[6-K] Ero Copper Corp. Current Report (Foreign Issuer)

Q: How did Ero Copper (ERO) perform financially in Q1 2026?

Ero Copper reported strong Q1 2026 results with revenue of $263.2 million and net income of $109.3 million . Diluted earnings were $1.04 per share , supported by solid copper operations, foreign-exchange gains and higher realized copper and gold prices across its Brazilian assets.

Q: What were Ero Copper’s Q1 2026 production and cost metrics?

Consolidated copper production was 17,287 tonnes in Q1 2026 at C1 cash costs of $2.39 per pound . Caraíba produced 8,826 tonnes at $2.79/lb , Tucumã 8,461 tonnes at $1.97/lb , and Xavantina produced 5,495 oz of gold at C1 cash costs of $2,120/oz .

Q: What are Ero Copper’s 2026 cost and capex guidance ranges?

The company guides consolidated copper C1 cash costs to $2.15–$2.35/lb , with Caraíba at $2.30–$2.50/lb and Tucumã at $1.95–$2.15/lb . Xavantina’s 2026 gold C1 cash costs are $1,000–$1,250/oz , AISC $2,000–$2,500/oz , and total capital expenditures are forecast at $275–$320 million .

Q: What is Ero Copper’s liquidity and debt position after Q1 2026?

At March 31, 2026, Ero Copper held $91.2 million in cash and cash equivalents and had total available liquidity of $146.2 million , including undrawn credit. Net debt was $490.7 million , down from $561.8 million a year earlier, reflecting continued deleveraging.

Q: How did foreign exchange and derivatives affect Ero Copper in Q1 2026?

Foreign exchange movements were significant, with a $53.7 million foreign-exchange gain in Q1 2026. The company also recorded a $16.5 million gain on foreign-exchange derivatives and a $7.3 million realized gain on settled currency collars, partly offset by losses on gold price derivatives.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

6-K

Rhea-AI Filing Summary

Ero Copper Corp. reported solid Q1 2026 results, driven by strong copper operations, higher metal prices and foreign-exchange gains, while reaffirming full-year 2026 guidance. Revenue reached $263.2 million and net income was $109.3 million, or $1.04 per diluted share.

Consolidated copper production was 17,287 tonnes at C1 cash costs of $2.39/lb, with Caraíba at 8,826 tonnes and Tucumã at 8,461 tonnes. Xavantina produced 5,495 oz of gold at higher unit costs while ventilation and cooling upgrades were completed.

Adjusted EBITDA was $125.2 million, operating cash flow was $92.8 million, and net debt declined to $490.7 million. Available liquidity totaled $146.2 million. The company maintained 2026 copper production guidance of 67,500–77,500 tonnes, gold guidance of 40,000–50,000 oz, and capital expenditure guidance of $275–$320 million, while advancing the Furnas Copper-Gold Project, which has a PEA outlining an after-tax NPV(8%) of $2.0 billion and a 27.0% after-tax IRR.

Insights

Ero Copper delivered strong Q1 2026 cash generation, kept guidance intact, and continued deleveraging.

Ero Copper generated Q1 2026 revenue of $263.2 million and net income of $109.3 million, supported by consolidated copper output of 17,287 tonnes at C1 costs of $2.39/lb. Tucumã showed low-cost performance at $1.97/lb, while Caraíba costs were higher at $2.79/lb on lower grades.

Operating cash flow of $92.8 million funded $60.1 million of investing outflows and $42.5 million of financing outflows, including loan repayments. Net debt eased to $490.7 million and available liquidity was $146.2 million, indicating adequate coverage for the $275–$320 million 2026 capex plan.

Guidance was reaffirmed: copper production of 67,500–77,500 tonnes, consolidated copper C1 costs of $2.15–$2.35/lb, and Xavantina gold output of 40,000–50,000 ounces with AISC of $2,000–$2,500/oz. The Furnas PEA, with an after-tax NPV(8%) of $2.0 billion and 27.0% IRR based on specified metal prices, provides long-term growth optionality, though it remains a preliminary study.

Form 6-K: How Foreign Companies Report to the SEC →

05/04/2026 - 05:06 PM

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of May 2026

Commission File Number 001-40459

ERO COPPER CORP.

(Translation of registrant's name into English)

625 Howe Street, Suite 1050

Vancouver, British Columbia V6C 2T6

Canada

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☐ Form 40-F ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1).

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7).

Exhibits 99.1, 99.2 and 99.3 of this Form 6-K is incorporated by reference as an additional exhibit to the registrant’s Registration Statement on Form S-8 (File NO. 333-264821) and Registration Statement on Form F-10 (File NO. 333-289969).

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


	Ero Copper Corp.

	By:	/s/ Deepk Hundal
		Name: Deepk Hundal
		Title: EVP, General Counsel and Corporate Secretary
Date: May 4, 2026

Exhibit Index


Exhibit Number						Description of Document

99.1						Management’s Discussion and Analysis for the three months ended March 31, 2026
99.2						Condensed Consolidated Interim Financial Statements for the three months ended March 31, 2026 and 2025
99.3						Press Release dated May 4, 2026

MANAGEMENT’S DISCUSSION

AND ANALYSIS

FOR THE THREE MONTHS ENDED

MARCH 31, 2026

1050 – 625 Howe Street, Vancouver, B.C., Canada V6C 2T6

Phone: 604-449-9244 | Website: www.ero.com | Email: info@ero.com


TABLE OF CONTENTS

BUSINESS OVERVIEW			1
HIGHLIGHTS			2
REVIEW OF OPERATIONS
The Caraíba Operations			6
The Tucumã Operation			7
The Xavantina Operations			8
2026 GUIDANCE			9
REVIEW OF FINANCIAL RESULTS
Review of quarterly results			11

Summary of quarterly results for most recent eight quarters			13
OTHER DISCLOSURES
Liquidity, Capital Resources, and Contractual Obligations			14
Management of Risks and Uncertainties			16
Other Financial Information			19
Accounting Policies, Judgments and Estimates			19
Capital Expenditures			21
Alternative Performance (NON-IFRS) Measures			22
Disclosure Controls and Procedures and Internal Control over Financial Reporting			32
Notes and Cautionary Statements			32

Ero Copper Corp. March 31, 2026 MD&A

MANAGEMENT’S DISCUSSION AND ANALYSIS

This Management’s Discussion and Analysis (“MD&A”) has been prepared as at May 4, 2026 and should be read in conjunction with the unaudited condensed consolidated interim financial statements of Ero Copper Corp. (“Ero”, the “Company”, or “we”) as at, and for the three months ended March 31, 2026, and related notes thereto, which are prepared in accordance with International Accounting Standards (“IAS”) 34, Interim Financial Reporting as permitted by the International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (the “IASB”). All references in this MD&A to “Q1 2026” and “Q1 2025” are to the three months ended March 31, 2026 and March 31, 2025, respectively. As well, this MD&A should be read in conjunction with the Company’s December 31, 2025 audited consolidated financial statements and MD&A. All dollar amounts are expressed in United States (“US”) dollars and tabular amounts are expressed in thousands of US dollars, unless otherwise indicated. References to “$”, “US$”, “dollars”, or “USD” are to US dollars, references to “C$” are to Canadian dollars, and references to “R$” or “BRL” are to Brazilian Reais.

This MD&A refers to various alternative performance (Non-IFRS) measures, including copper C1 cash cost, realized copper price, gold C1 cash cost, gold all-in sustaining cost (“AISC”), realized gold price, EBITDA, adjusted EBITDA, adjusted net income attributable to owners of the Company, adjusted net income per share attributable to owners of the Company, net (cash) debt, working capital and available liquidity. Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" for a discussion of non-IFRS measures.

This MD&A contains “forward‐looking statements” that are subject to risk factors set out in a cautionary note contained at the end of this MD&A. The Company cannot assure investors that such statements will prove to be accurate, and actual results and future events may differ materially from those anticipated in such statements. The results for the periods presented are not necessarily indicative of the results that may be expected for any future period. Investors are cautioned not to place undue reliance on such forward-looking statements. All information contained in this MD&A is current and has been approved by the Board of Directors of the Company (the “Board”) as of May 4, 2026, unless otherwise stated.

BUSINESS OVERVIEW

Ero is a Brazil-focused, growth-oriented mining company with a diversified portfolio of copper and gold assets, headquartered in Vancouver, B.C. The Company operates two copper mines – the Caraíba Operations in Bahia State and the Tucumã Operation in Pará State – as well as the Xavantina Operations, a producing gold mine in Mato Grosso State. In addition to its operating assets, Ero is advancing the Furnas Copper-Gold Project, located in the mineral-rich Carajás Province in Pará State, through a definitive earn-in agreement with Vale Base Metals to acquire a 60% interest in the project.

Ero’s operating philosophy is grounded in a commitment to safety, operational excellence, and the responsible production of minerals essential for a better tomorrow. The Company’s shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol “ERO.” Additional information, including technical reports on the Company’s operations and projects, is available on the Company’s website (www.ero.com), SEDAR+ (www.sedarplus.ca), and on EDGAR (www.sec.gov).

Ero Copper Corp. March 31, 2026 MD&A | Page 1

HIGHLIGHTS

Operating Highlights


	2026 - Q1		2025 - Q4		2025 - Q1
Copper (Caraíba Operations)
Ore Processed (tonnes)	1,072,209		1,174,732		692,901
Grade (% Cu)	0.93		1.00		1.18
Cu Production (tonnes)	8,826		10,431		7,357
Cu Production (lbs)	19,458,721		22,995,437		16,219,125
Cu Sold in Concentrate (tonnes)	9,205		10,404		6,949
Cu Sold in Concentrate (lbs)	20,293,558		22,938,017		15,318,111

Cu C1 Cash Cost(1)	$	2.79	$	2.27	$	2.22

Copper (Tucumã Operation)
Ore Processed (tonnes)	563,717		517,246		294,314
Grade (% Cu)	1.66		1.93		2.18
Cu Production (tonnes)	8,461		9,275		5,067
Cu Production (lbs)	18,652,405		20,448,756		11,170,823
Cu Sold in Concentrate (tonnes)	8,751		9,729		5,168
Cu Sold in Concentrate (lbs)	19,292,160		21,449,509		11,393,490
Cu C1 Cash Cost(1)(2)	$	1.97	$	1.75	$	—

Total Copper
Cu Production (tonnes)	17,287		19,706		12,424
Cu Production (lbs)	38,111,126		43,444,193		27,389,948
Cu Sold in Concentrate (tonnes)	17,956		20,133		12,117
Cu Sold in Concentrate (lbs)	39,585,718		44,387,526		26,711,601
Realized copper price(1)	$	5.53	$	5.07	$	4.07
Cu C1 Cash Cost(1)(2)	$	2.39	$	2.03	$	2.22

Gold (Xavantina Operations)
Ore Processed (tonnes)	37,128		53,256		33,228
Grade (g / tonne)	5.66		9.98		6.87
Au Production (oz)	5,495		13,837		6,638
Au Sold in Dore (oz)	6,019		13,401		5,834
Au Sold in Concentrate (oz)(3)	4,311		12,754		—

Au C1 Cash Cost(1)	$	2,120	$	766	$	1,100
Au AISC(1)	$	4,441	$	1,702	$	2,228

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

(2) The Company declared commercial production at the Tucumã Operation effective July 1, 2025. As such, 2025 copper C1 cash cost for the Tucumã Operation and consolidated copper operations reflect only Tucumã Operation's costs from Q3 2025 onward.

(3) Gold sold in concentrate includes gold ounces produced from the CIL circuit and the pond.

Ero Copper Corp. March 31, 2026 MD&A | Page 2

Financial Highlights

($ in millions, except per share amounts)


	2026 - Q1		2025 - Q4		2025 - Q1
Revenues	$	263.2	$	320.2	$	125.1
Gross profit	105.9		164.4		55.5
EBITDA(1)	175.5		151.8		117.9
Adjusted EBITDA(1)	125.2		186.7		63.2
Cash flow from operations	92.8		129.1		65.4
Net income	109.3		78.7		80.6
Net income attributable to owners of the Company	108.8		77.0		80.2
- Per share (basic)	1.04		0.74		0.77
- Per share (diluted)	1.04		0.74		0.77
Adjusted net income attributable to owners of the Company(1)	72.4		108.4		35.8
- Per share (basic)	0.69		1.04		0.35
- Per share (diluted)	0.69		1.04		0.35

Cash, cash equivalents, and short-term investments	91.2		105.4		80.6
Working capital(1)	66.2		15.5		10.2
Available liquidity(1)	146.2		150.4		115.6
Net debt(1)	490.7		501.7		561.8

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

Q1 2026 Highlights

Strong performance from copper operations drove solid quarterly financial results and cash flow generation that contributed to continued deleveraging during the period.

•Consolidated copper production totaled 17,287 tonnes in concentrate at C1 cash costs(1) of $2.39 per pound produced.

◦The Caraíba Operations produced 8,826 tonnes of copper in concentrate, reflecting strong throughput rates and the continued benefit of the 2025 plant debottlenecking initiative. Planned stope sequencing at the Pilar Mine drove lower mined copper grades during the period, resulting in C1 cash costs(1) of $2.79 per pound produced.

◦The Tucumã Operation produced 8,461 tonnes of copper in concentrate at C1 cash costs(1) of $1.97 per pound produced, reflecting higher plant throughput supported by the early completion in Q4 2025 of planned mill liner replacement maintenance originally scheduled for Q1 2026, and lower planned processed copper grades.

•The Xavantina Operations undertook an important, and necessary, ventilation project during the quarter resulting in production of 5,495 ounces during the quarter at C1 cash costs(1) and AISC(1) of $2,120 and $4,441 per ounce, respectively. Gold sales in the period totaled 10,330 ounces, including contributions from Xavantina's gold concentrate sales program.

Ero Copper Corp. March 31, 2026 MD&A | Page 3

•Quarterly financial performance benefitted from solid operating results at the Caraíba and Tucumã Operations along with strong metal prices.

◦Net income attributable to the owners of the Company was $108.8 million ($1.04 per share on a diluted basis).

◦Adjusted net income attributable to the owners of the Company(1) was $72.4 million ($0.69 per share on a diluted basis).

◦Cash flow from operations was $92.8 million.

◦Adjusted EBITDA(1) was $125.2 million.

•Available liquidity(1) at quarter-end was $146.2 million, including $91.2 million in cash and cash equivalents and $55.0 million of undrawn availability under the Company's senior secured revolving credit facility ("Senior Credit Facility"). During the quarter, a $10.0 million repayment on the Senior Credit Facility contributed to a reduction in total balance sheet debt of over $25 million to $581.9 million, from $607.1 million at year-end 2025.

The Company is reaffirming 2026 production, operating cost and capital expenditure guidance.

•Consolidated copper production guidance of 67,500 to 77,500 tonnes is expected to be second-half weighted, reflecting increasing projected throughput volumes and copper grades at the Caraíba Operations in H2 2026 and higher mill throughput at the Tucumã Operation over the remaining quarters of the year, partially offset by a planned decline in copper grades.

•At the Xavantina Operations, the installation and tie-in of ventilation and cooling infrastructure undertaken during Q1 was substantially complete at the end of April. As a result, mining rates, mill throughput and processed grades are expected to increase sequentially over the remaining quarters of the year, with full-year gold production of 40,000 to 50,000 ounces projected to be second-half weighted. Gold concentrate sales are expected to benefit meaningfully from dryer conditions as the rainy season ends, with average quarterly rainfall at Xavantina typically declining from approximately 650 to 700 millimeters in Q1 to approximately 60 millimeters in Q2 and Q3, significantly reducing drying times and supporting higher concentrate sales volumes through the remainder of the year.

•Consolidated copper C1 cash cost guidance is maintained at $2.15 to $2.35 per pound produced, with unit costs expected to decrease in H2 2026 when processed grades at the Caraíba Operations are projected to increase. Full-year gold C1 cash cost(1) and AISC(1) guidance for the Xavantina Operations is maintained at $1,000 to $1,250 and $2,000 to $2,500 per ounce, respectively, with unit costs expected to improve with the ventilation and cooling system supporting higher mine production levels.

•Full-year capital expenditure guidance is maintained at $275 to $320 million.

Ero Copper Corp. March 31, 2026 MD&A | Page 4

The Company continues to advance the Furnas Copper-Gold Project, publishing an inaugural Preliminary Economic Assessment on March 30, 2026.(2)

•The Preliminary Economic Assessment ("PEA") for the Furnas Copper-Gold Project ("Furnas" or the "Project") was filed on SEDAR+ on March 30, 2026. The PEA outlines a large-scale, long-life operation with compelling economics, including an after-tax net present value (8%) of $2.0 billion and a 27.0% after-tax internal rate of return based on long-term copper, gold and silver prices of $4.60 per pound, $3,300 per ounce, and $40.00 per ounce, respectively.

•During Q1 2026, the Company completed over 12,000 meters of drilling at Furnas as part of the 50,000-meter 2026 drill program. The program is focused on two primary objectives: (i) upgrading inferred mineral resources to higher confidence categories ahead of future technical studies and (ii) extending mineralization along strike within the high-grade zones adjacent to planned infrastructure. Additional site activities during the quarter included advancement of engineering, environmental and permitting work.

The PEA is preliminary in nature and includes inferred mineral resources, which are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves, and there is no certainty that the PEA will be realized. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

(2) For more information on the Furnas PEA, please see the Company's press release dated March 30, 2026.

Ero Copper Corp. March 31, 2026 MD&A | Page 5

REVIEW OF OPERATIONS

The Caraíba Operations


	2026 - Q1		2025 - Q4		2025 - Q1
Ore mined (tonnes)	985,577		1,225,017		696,239
Ore processed (tonnes)	1,072,209		1,174,732		692,901
Grade (% Cu)	0.93		1.00		1.18
Recovery (%)	88.3		88.7		90.2

Cu Production (tonnes)	8,826		10,431		7,357
Cu Production (lbs)	19,458,721		22,995,437		16,219,125

Concentrate grade (% Cu)	32.3		33.0		32.3
Concentrate sales (tonnes)	28,662		31,220		21,622
Cu Sold in Concentrate (tonnes)	9,205		10,404		6,949
Cu Sold in Concentrate (lbs)	20,293,558		22,938,017		15,318,111


Copper C1 cash cost(1)	$	2.79	$	2.27	$	2.22

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

The Caraíba Operations produced 8,826 tonnes of copper in concentrate during the quarter at a C1 cash cost(1) of $2.79 per pound of copper produced.

Copper production declined approximately 15% from the prior quarter, reflecting lower processed grades due to planned stope sequencing at the Pilar Mine and reduced contributions from the Surubim pit during the quarter due to seasonal rainfall.

Copper production from the Caraíba Operations is expected to total between 35,000 to 40,000 tonnes in 2026, with processed tonnage and grades expected to be similar in Q2 before increasing in H2 2026. Full-year 2026 copper C1 cash cost(1) guidance of $2.30 to $2.50 per pound produced is maintained, with unit costs expected to be above the guidance range in H1 2026 and decline sequentially through the third and fourth quarters.

Ero Copper Corp. March 31, 2026 MD&A | Page 6

The Tucumã Operation


	2026 - Q1		2025 - Q4		2025 - Q1
Ore mined (tonnes)	456,684		1,199,067		328,291
Ore processed (tonnes)	563,717		517,246		294,314
Grade (% Cu)	1.66		1.93		2.18
Recovery (%)	88.3		90.5		89.4

Cu Production (tonnes)	8,461		9,275		5,067
Cu Production (lbs)	18,652,405		20,448,756		11,170,823

Concentrate grade (% Cu)	28.5		29.4		30.3
Concentrate sales (tonnes)	30,518		34,111		16,279
Cu Sold in Concentrate (tonnes)	8,751		9,729		5,168
Cu Sold in Concentrate (lbs)	19,292,160		21,449,509		11,393,490


Copper C1 cash cost(1)(2)	$	1.97	$	1.75	$	—

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

The Tucumã Operation produced 8,461 tonnes of copper in concentrate during Q1 2026 at a C1 cash cost(1) of $1.97 per pound of copper produced.

Mill throughput showed steady performance increasing by more than 9% quarter-on-quarter and approximately 90% when compared to Q1 2025. Copper production decreased approximately 9% quarter-on-quarter, reflecting lower processed copper grades, partially offset by higher plant throughput.

Copper production from the Tucumã Operation is expected to total between 32,500 to 37,500 tonnes in 2026, modestly weighted to the second half of the year on higher plant throughput. Full-year C1 cash cost(1) guidance for Tucumã is maintained at $1.95 to $2.15 per pound produced.

In Q1 2026, the Company ordered modular tailings filters to augment Tucumã's tailings filtration circuit. The additional filters are expected to be installed and commissioned in H2 2026 and, accordingly, any incremental filtration capacity and associated plant throughput benefits have not been incorporated into full-year operational guidance.

Ero Copper Corp. March 31, 2026 MD&A | Page 7

The Xavantina Operations


	2026 - Q1		2025 - Q4		2025 - Q1
Ore mined (tonnes)	32,820		55,655		33,228
Ore processed (tonnes)	37,128		53,256		33,228
Head grade (grams per tonne Au)	5.66		9.98		6.87
Recovery (%)	81.3		79.6		90.8



Gold ounces produced (oz)	5,495		13,837		6,638
Silver ounces produced (oz)	2,562		8,264		3,996

Gold sold in doré (oz)	6,019		13,401		5,834
Gold sold in concentrate (oz)	4,311		12,754		—
Gold sold (oz)	10,330		26,155		5,834
Silver sold in doré (oz)	3,208		8,295		3,761

Realized gold price(1)	$	4,195	$	3,885	$	2,705
Gold C1 cash cost(1)	$	2,120	$	766	$	1,100
Gold AISC(1)	$	4,441	$	1,702	$	2,228

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

The Xavantina Operations produced 5,495 ounces of gold during the quarter at C1 cash costs(1) and AISC(1) of $2,120 and $4,441 per ounce, respectively.

As expected, gold production declined from the previous quarter as mining activity was impacted during Q1 by the installation and tie-in of ventilation and cooling infrastructure and the installation of additional ground support, both of which are expected to support higher development and mining rates beginning in the second quarter.

Gold production from the Xavantina Operations is expected to total between 40,000 to 50,000 ounces in 2026 at full-year C1 cash costs(1) of $1,000 to $1,250 per ounce and AISC(1) of $2,000 to $2,500 per ounce. The installation and tie-in of the ventilation and cooling infrastructure was advanced during Q1 and was substantially complete at the end of April. As a result, mining rates, mill throughput and processed grades are expected to increase through the remainder of the year, with full-year production projected to be significantly second-half weighted and unit costs expected to decline in conjunction with higher production levels.

Quarterly gold sales totaled 10,330 ounces, including contributions from Xavantina's gold concentrate sales program, which declined as expected relative to the prior quarter due to seasonal rainfall that extends drying time. Gold concentrate sales are expected to benefit from dryer seasonal conditions throughout the remainder of the year.

Ero Copper Corp. March 31, 2026 MD&A | Page 8

2026 GUIDANCE

Consolidated copper production guidance is maintained in the range of 67,500 to 77,500 tonnes. Full-year copper production is expected to be second-half weighted at both the Caraíba and Tucumã Operations. Production at Caraíba in Q2 is expected to be broadly similar to Q1 before increasing in H2 2026, driven by higher processed grades from planned mine sequencing along with higher throughput levels. Production at Tucumã is expected to be modestly higher in H2 2026 on higher plant throughput, partially offset by lower planned copper grades.

Full-year consolidated copper C1 cash cost(1) guidance is maintained at $2.15 to $2.35 per pound produced, with costs expected to be above the guidance range in H1 2026 and to decrease sequentially through H2 2026 as processed grades at the Caraíba Operations increase.

At the Xavantina Operations, gold production from mining and processing operations is expected to total between 40,000 to 50,000 ounces in 2026. Gold production is expected to be lowest in Q1, with mining rates, mill throughput and processed grades expected to increase sequentially through the remainder of the year with work on the ventilation and cooling system tie-in substantially complete at the end of April. As a result, production at Xavantina is expected to be weighted towards H2 2026.

Full-year gold C1 cash cost(1) and AISC(1) guidance for the Xavantina Operations is maintained at $1,000 to $1,250 and $2,000 to $2,500 per ounce, respectively. Unit costs are expected to be highest in Q1 and to decline over the remaining quarters of the year as production volumes increase.

Gold concentrate sales volumes are expected to be lowest in Q1 due to the impact of heavy seasonal rainfall on concentrate drying times and are expected to benefit from dryer conditions through the remainder of 2026. Gold concentrate sales from historic stockpiles are not included in Xavantina's guidance ranges, which capture only production from mining and processing operations.

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

Ero Copper Corp. March 31, 2026 MD&A | Page 9

2026 Production and Cost Guidance



Consolidated Copper Production (tonnes)
Caraíba Operations																								35,000 - 40,000
Tucumã Operation																								32,500 - 37,500
Total Copper																								67,500 - 77,500

Consolidated Copper C1 Cash Cost ($/lb)(1)
Caraíba Operations																								$2.30 - $2.50
Tucumã Operation																								$1.95 - $2.15
Consolidated Copper Operations																								$2.15 - $2.35

The Xavantina Operations
Au Production (ounces)																								40,000 - 50,000
Gold C1 Cash Cost(1) ($/oz)																								$1,000 - $1,250
Gold AISC(1) ($/oz)																								$2,000 - $2,500

Note: Guidance is based on estimates and assumptions including, but not limited to, mineral reserve estimates, grade and continuity of interpreted geological formations and metallurgical recovery performance. Please refer to the Company’s SEDAR+ and EDGAR filings, including the most recent Annual Information Form ("AIF"), for a detailed summary of risk factors.

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this MD&A.

2026 Capital Expenditure Guidance

Total capital expenditures guidance remains unchanged at a range between $275 to $320 million.

Figures presented in the table below are in USD millions.



Caraíba Operations						$170 - $185




Tucumã Operation						$35 - $45





Xavantina Operations						$40 - $50











Furnas Copper-Gold Project, Other Exploration & Corporate						$30 - $40
Total						$275 - $320

Ero Copper Corp. March 31, 2026 MD&A | Page 10

REVIEW OF FINANCIAL RESULTS

The following table provides a summary of the financial results of the Company for Q1 2026 and Q1 2025. Tabular amounts are in thousands of US dollars, except share and per share amounts.


		Three months ended March 31,
	Notes	2026		2025

Revenue	1	$	263,170	$	125,088
Cost of sales	2	(157,256)		(69,566)
Gross profit		105,914		55,522
Expenses
General and administrative		(11,058)		(11,371)
Share-based compensation		(2,640)		(1,173)

Operating Income		92,216		42,978
Finance income		1,121		838
Finance expense	3	(11,064)		(4,723)
Foreign exchange gain	4	53,655		58,400
Other expenses		(8,732)		(2,125)
Income before income taxes		127,196		95,368
Income tax expense
Current		(7,197)		(3,718)
Deferred		(10,688)		(11,023)
	5	(17,885)		(14,741)
Net income for the period		$	109,311	$	80,627

Other comprehensive gain
Foreign currency translation gain	6	51,881		45,775
Comprehensive income		$	161,192	$	126,402









Net income per share attributable to owners of the Company
Basic		$	1.04	$	0.77
Diluted		$	1.04	$	0.77
Weighted average number of common shares outstanding
Basic		104,262,136		103,564,654
Diluted		105,023,869		103,904,737

Ero Copper Corp. March 31, 2026 MD&A | Page 11

Notes:

1. Revenues from copper sales in Q1 2026 was $220.7 million (Q1 2025 - $109.5 million) on sale of 39.6 million lbs of copper (Q1 2025 - 26.7 million lbs). The increase in copper revenues was primarily attributed to a 48% increase in copper sold and a 36% higher average realized price against the comparative period.

Revenues from gold sales in Q1 2026 was $42.5 million (Q1 2025 - $15.6 million) on sale of 6,019 ounces of gold in dore (Q1 2025 - 5,834 ounces) and 4,311 ounces of gold in concentrate (Q1 2025 - nil ounces) at an average realized price of $4,195 per ounce (Q1 2025 - $2,705 per ounce). The increase in gold revenues was primarily driven by 55% higher realized gold price and 77% higher sales volumes.

2. Cost of sales for Q1 2026 from copper sales was $136.2 million (Q1 2025 - $59.5 million). Cost of sales includes production costs which primarily consist of $33.0 million (Q1 2025 - $14.7 million) in depreciation and depletion, $25.8 million (Q1 2025 - $6.3 million) in contracted services, $23.0 million (Q1 2025 - $16.0 million) in salaries and benefits, $17.5 million (Q1 2025 - $10.2 million) in materials and consumables, $15.8 million (Q1 2025 - $8.8 million) in maintenance costs, $11.1 million (Q1 2025 - $3.6 million) in sales expenses, $5.3 million (Q1 2025 - $3.6 million) in utilities, and $3.8 million decrease (Q1 2025 - $4.1 million increase) in inventories. The increase in cost of sales in Q1 2026 compared to Q1 2025 was primarily attributed to a $41.8 million increase in cost of sales at the Tucumã Operation upon achieving commercial production in Q3 2025, as well as a $34.9 million increase at the Caraíba Operations reflecting higher mining and processing costs due to increased ore processed to offset lower head grades.

Cost of sales for Q1 2026 from gold sales was $21.1 million (Q1 2025 - $10.1 million). Cost of sales includes production costs which primarily consist of $5.0 million (Q1 2025 - $3.6 million) in depreciation and depletion, $4.5 million (Q1 2025 - $2.9 million) in salaries and benefits, $2.4 million (Q1 2025 - $1.5 million) in materials and consumables, $3.0 million (Q1 2025 - $1.9 million) in contracted services, $1.3 million (Q1 2025 - $0.7 million) in maintenance costs, $0.9 million (Q1 2025 - $0.5 million) in utilities, and $1.7 million decrease (Q1 2025 - $1.3 million increase) in inventories. The increase in cost of sales as compared to Q1 2025 reflects higher mining costs as the operation transitioned to mechanized mining, as well as increase in tonnes processed to offset lower head grades.

3. Finance expense for Q1 2026 was $11.1 million (Q1 2025 - $4.7 million) and was primarily comprised of interest on loans and borrowings of $5.4 million (Q1 2025 - nil), other finance expense of $2.3 million (Q1 2025 - $2.7 million), accretion of deferred revenue of $1.9 million (Q1 2025 - $0.6 million), accretion of asset retirement obligations of $0.8 million (Q1 2025 - $0.8 million), and lease interest of $0.7 million (Q1 2025 - $0.6 million). The increase in finance expense from Q1 2025 was primarily due to a decrease in capitalization of borrowing costs after commercial production was achieved at the Tucumã Operation effective July 1, 2025. During the quarter, $4.9 million (Q1 2025 - $11.0 million) in borrowing costs were capitalized to projects in progress primarily related to Deepening project.

4. Foreign exchange gain for Q1 2026 was $53.7 million (Q1 2025 - $58.4 million gain). This amount is primarily comprised of $34.6 million (Q1 2025 - $45.1 million gain) in foreign exchange gain on USD denominated debt at MCSA for which the functional currency is the BRL, $16.5 million (Q1 2025 - $16.8 million gain) of unrealized foreign exchange gain on derivative contracts, and $7.3 million (Q1 2025 - $2.2 million loss) of realized foreign exchange gain on derivative contracts, partially offset by other foreign exchange losses of $4.8 million (Q1 2025 - $1.3 million losses). The unrealized foreign exchange gain on USD denominated debt and on derivative contracts was a result of a 5% strengthening of the BRL against the USD during the period.

5. In Q1 2026, the Company recognized $17.9 million in income tax expense (Q1 2025 $14.7 million expense). The increase in income tax expense was primarily a result of an increase in income before taxes as compared to the same quarter of the prior year.

6. The foreign currency translation gain is a result of a fluctuation of the BRL against the USD during Q1 2026, which strengthened from approximately 5.50 BRL per US dollar at the beginning of Q1 2026 to approximately 5.22 BRL per US dollar by the end of the quarter, when translating the net assets of the Company’s Brazilian subsidiaries to USD for presentation in the Company’s condensed consolidated interim financial statements.

Ero Copper Corp. March 31, 2026 MD&A | Page 12

SUMMARY OF QUARTERLY RESULTS

The following table presents selected financial information for each of the most recent eight quarters. Tabular amounts are in millions of US Dollars, except share and per share amounts.


Selected Financial Information	Mar. 31,(1)		Dec. 31,(2)		Sep. 30,(3)		Jun. 30,(4)		Mar. 31,(5)		Dec. 31,(6)		Sep. 30,(7)		Jun. 30,(8)
	2026		2025		2025		2025		2025		2024		2024		2024
Revenue	$	263.2	$	320.2	$	177.1	$	163.5	$	125.1	$	122.5	$	124.8	$	117.1
Cost of sales	$	(157.3)	$	(155.7)	$	(119.7)	$	(96.2)	$	(69.6)	$	(70.2)	$	(71.1)	$	(73.8)
Gross profit	$	105.9	$	164.4	$	57.4	$	67.3	$	55.5	$	52.4	$	53.7	$	43.3
Net income (loss) for period	$	109.3	$	78.7	$	36.5	$	71.0	$	80.6	$	(48.9)	$	41.4	$	(53.4)
Income (loss) per share attributable to owners of the Company
- Basic	$	1.04	$	0.74	$	0.35	$	0.68	$	0.77	$	(0.47)	$	0.40	$	(0.52)
- Diluted	$	1.04	$	0.74	$	0.35	$	0.68	$	0.77	$	(0.47)	$	0.39	$	(0.52)
Weighted average number of common shares outstanding
- Basic	104,262,136		103,961,272		103,621,631		103,582,082		103,564,654		103,345,064		103,239,881		103,082,363
- Diluted	105,023,869		104,693,751		104,044,755		103,905,561		103,904,737		103,345,064		103,973,827		103,082,363

Notes:

1.During Q1 2026, the Company recognized net income of $109.3 million compared to net income of $78.7 million in the preceding quarter. The increase in net income compared to the prior quarter was primarily attributable to a $77.0 million increase in foreign exchange gains ($53.7 million gain compared to $23.3 million loss in the prior quarter), a $6.3 million decrease in share-based compensation, a $5.6 million decrease in income tax expense, partially offset by a $58.5 million decrease in gross profit and a $1.8 million increase in other expenses.

2.During Q4 2025, the Company recognized net income of $78.7 million compared to net income of $36.5 million in the preceding quarter. The increase in net income compared to the prior quarter was primarily attributable to a $107.0 million higher gross profit, partially offset by $45.4 million lower foreign exchange gain ($23.3 million loss compared to $22.1 million gain in the prior quarter), $10.7 million increase in income tax expense, $6.2 million increase in other expenses, and $2.2 million increase in share-based compensation from mark-to-market revaluation of share-based compensation liability.

3.During Q3 2025, the Company recognized net income of $36.5 million compared to net income of $71.0 million in the preceding quarter. The decrease in net income compared to the prior quarter was primarily attributable to a $16.5 million lower foreign exchange gain, $9.9 million lower gross profit and $5.4 million higher finance expense from the cessation of capitalization of borrowing costs at the Tucumã Operation following the declaration of commercial production on July 1, 2025.

4.During Q2 2025, the Company recognized net income of $71.0 million compared to net income of $80.6 million in the preceding quarter. The decrease in net income was primarily attributable to a lower foreign exchange gain of $38.6 million in the current quarter compared to $58.4 million in the preceding quarter, partially offset by a higher gross profit of $67.3 million in the current quarter compared to $55.5 million in the preceding quarter.

Ero Copper Corp. March 31, 2026 MD&A | Page 13

5.During Q1 2025, the Company recognized net income of $80.6 million compared to net loss of $48.9 million in the preceding quarter. The increase in net income was primarily attributable to foreign exchange gains of $58.4 million compared to foreign exchange losses of $92.8 million in the preceding quarter, partially offset by an income tax expense of $14.7 million compared to an income tax recovery of $5.9 million in the preceding quarter.

6.During Q4 2024, the Company recognized net loss of $48.9 million compared to net income of $41.4 million in the preceding quarter. The decrease in net income was primarily attributable to foreign exchange losses of $92.8 million compared to foreign exchange gains of $17.2 million in the preceding quarter, partially offset by income tax recovery of $5.9 million compared to income tax expense of $8.3 million in the preceding quarter.

7.During Q3 2024, the Company recognized net income of $41.4 million compared to net loss of $53.4 million in the preceding quarter. The increase in net income was primarily attributable to higher revenues, as well as foreign exchange gains of $17.2 million compared to foreign exchange losses of $70.5 million in the preceding quarter, as well as a $10.7 million write-down in exploration and evaluation assets recognized in the preceding quarter.

8.During Q2 2024, the Company recognized net loss of $53.4 million compared to net loss of $6.8 million in the preceding quarter. The increase in loss was primarily attributable to foreign exchange losses of $70.5 million compared to $19.0 million in the preceding quarter. The change in foreign exchange gain or loss was primarily driven by volatility of the Brazilian Real against the US Dollar during the respective periods. In addition, during the quarter, the Company terminated the Fides option agreement, resulting in a write-down in exploration and evaluation assets of $10.7 million.

LIQUIDITY, CAPITAL RESOURCES, AND CONTRACTUAL OBLIGATIONS

Liquidity

As at March 31, 2026, the Company had cash and cash equivalents of $91.2 million and available liquidity of $146.2 million. Cash and cash equivalents were primarily comprised of cash held with reputable financial institutions and are invested in highly liquid short-term investments with maturities of three months or less. The funds are not exposed to liquidity risk and there are no restrictions on the ability of the Company to use these funds to meet its obligations.

Cash and cash equivalents decreased by $14.2 million from December 31, 2025. The Company’s cash flows from operating, investing, and financing activities for the three months ended March 31, 2026, are summarized as follows:

•Cash from operating activities of $92.8 million, primarily consists of:

◦$125.2 million of adjusted EBITDA (see Non-IFRS Measures);

net of:

◦$24.1 million of net change in non-cash working capital items;

◦$5.3 million of amortization of non-cash deferred revenues; and

◦$2.4 million of derivative contract settlements.

Partially offset by:

•Cash used in investing activities of $60.1 million, including:

◦$55.8 million of additions to mineral property, plant and equipment; and

Ero Copper Corp. March 31, 2026 MD&A | Page 14

◦$5.0 million of additions to exploration and evaluation assets;

net of:

◦$0.7 million in interest received.

•Cash used in financing activities of $42.5 million, primarily consists of:

◦$21.4 million of principal repayments on loans and borrowings;

◦$16.8 million of interest paid on loans and borrowings; and

◦$5.2 million of lease payments;

net of:

◦$2.7 million of new loans and borrowings; and

◦$1.1 million of proceeds from exercise of stock options.

As at March 31, 2026, the Company had working capital of $66.2 million.

Capital Resources

The Company’s primary sources of capital are comprised of cash from operations, and cash and cash equivalents on hand. The Company continuously monitors its liquidity position and capital structure and, based on changes in operations and economic conditions, may adjust such structure by issuing new common shares or new debt as necessary. Taking into consideration expected cash flow from existing operations and available liquidity, management believes that the Company has sufficient capital to fund its planned operations and activities, and other initiatives, for the foreseeable future.

At March 31, 2026, the Company had available liquidity of $146.2 million, including $91.2 million in cash and cash equivalents and $55.0 million of undrawn availability under its Senior Credit Facility.

The Company has a senior revolving credit facility (the "Senior Revolving Credit Facility") which has a borrowing limit of $200 million and matures in December 2028. The applicable interest margin is based on sliding scales of SOFR plus 2.00% to 4.25% and commitment fee ranges from 0.45% to 0.96%, based on the Company's net leverage ratio, with lower leverage ratios resulting in lower pricing.

In relation to its loans and borrowings, the Company is required to comply with certain financial covenants. As of the date of the condensed consolidated interim financial statements, the Company is in compliance with these covenants. The loan agreements also contain covenants that could restrict the ability of the Company and its subsidiaries, including MCSA, Ero Gold, and NX Gold, to, among other things, incur additional indebtedness needed to fund its respective operations, pay dividends or make other distributions, make investments, create liens, sell or transfer assets or enter into transactions with affiliates. There are no other restrictions or externally imposed capital requirements of the Company.

Ero Copper Corp. March 31, 2026 MD&A | Page 15

On March 28, 2025, the Company extended the terms of the Original Xavantina Stream with Royal Gold to expand the area of influence from which production is subjected to the arrangement to include additional tenements acquired by the Company since the Original Xavantina Stream was completed, and extend the gold delivery threshold milestone from 93,000 ounces of gold to 160,000 ounces of gold, before decreasing to 10% of gold produced over the remaining life of the mine. In exchange, the Company received additional upfront cash consideration of $50.0 million. The delivery of additional ounces under the amended stream is expected to commence in 2028.

Contractual Obligations and Commitments

The Company has a precious metals purchase agreement (the "Xavantina Gold Stream") with RGLD Gold AG ("Royal Gold"), a wholly-owned subsidiary of Royal Gold, Inc., whereby the Company is obligated to sell a portion of its gold production from the Xavantina Operations at contract prices.

Refer to the "Liquidity Risk" section for further information on the Company's contractual obligations and commitments.

MANAGEMENT OF RISKS AND UNCERTAINTIES

The Company examines the various financial instruments and risks to which it is exposed and assesses the impact and likelihood of those risks. These risks may include credit risk, liquidity risk, currency risk, commodity price risk and interest rate risk. Where material, these risks are reviewed and monitored by the Board.

Credit risk

Credit risk is the risk of financial loss to the Company if a customer or counterparty to a financial instrument fails to meet its contractual obligations and arises principally from the Company’s receivables from customers. The carrying amount of the financial assets below represents the maximum credit risk exposure as at March 31, 2026 and December 31, 2025:


	March 31, 2026		December 31, 2025
Cash and cash equivalents	91,207		$	105,442

Trade receivables	48,064		41,061
Derivatives	23,586		4,701
Note receivables	14,564		13,403
Deposits and other assets	3,545		3,577
	$	180,966	$	168,184

The Company invests cash and cash equivalents with financial institutions that are financially sound based on their credit rating.

The Company’s exposure to credit risk associated with accounts receivable is influenced mainly by the individual characteristics of each customer.

Ero Copper Corp. March 31, 2026 MD&A | Page 16

In 2022, one of the Company's customers in Brazil, Paranapanema S/A ("PMA"), filed for bankruptcy protection. As a preferred supplier to PMA, the Company had a note receivable arrangement with PMA, which was excluded from the judicial recovery process and provides the Company with certain judicial guarantees. According to the note receivable arrangement, repayment was structured over 24 monthly installments beginning in March 2024, with an annual interest rate equivalent to Brazil's CDI rate of approximately 11.65%.

At March 31, 2026, PMA continued to be in default of the agreement and the gross amount of accounts and note receivable from PMA was $26.1 million (December 31, 2025 - $24.4 million). Accordingly, the note receivable is considered credit impaired, and the Company recorded a credit loss provision and present value discount of $15.7 million (December 31, 2025 - $14.9 million). The carrying value of the PMA note receivable at March 31, 2026 was $10.4 million (December 31, 2025 - $9.5 million), entirely included in deposits and other non-current assets. No provision was recorded on the credit loss provision in the three months ended March 31, 2026 (nil for the three months ended March 31, 2025).

Liquidity risk

Liquidity risk is the risk associated with the difficulties that the Company may have meeting the obligations associated with financial liabilities that are settled with cash payments or with another financial asset. The Company's approach to liquidity management is to ensure as much as possible that sufficient liquidity exists to meet their maturity obligations on the expiration dates, under normal and stressful conditions, without causing unacceptable losses or with risk of undermining the normal operation of the Company.

The table below shows the Company's maturity of non-derivative financial liabilities on March 31, 2026:


Non-derivative financial liabilities	Carrying value		Contractual cash flows		Up to 12 months		1 - 2 years		3 - 5 years		More than 5 years
Loans and borrowings (including interest)	$	581,893	$	716,738	$	72,547	$	217,969	$	426,222	$	—
Accounts payable and accrued liabilities	144,364		147,624		147,624		—		—		—
Other non-current liabilities	16,739		31,165		—		29,947		831		387
Leases	21,544		23,510		16,400		7,001		106		3
Total	$	764,540	$	919,037	$	236,571	$	254,917	$	427,159	$	390

The Company also has a derivative financial asset for foreign exchange collar contracts whose notional amounts and maturity information are disclosed below under foreign exchange currency risk.

Foreign exchange currency risk

Ero Copper Corp. March 31, 2026 MD&A | Page 17

future sales expectations indexed to US dollar variation in relation to the cash requirement to settle the existing financings.

The Company's exposure to foreign exchange currency risk at March 31, 2026 relates to $37.7 million (December 31, 2025 – $46.6 million) in loans and borrowings of MCSA denominated in US dollars and Euros. In addition, the Company is also exposed to foreign exchange currency risk at March 31, 2026 on $595.9 million of intercompany loan balances (December 31, 2025 - $604.6 million) which have contractual repayment terms. Strengthening (weakening) in the Brazilian Real against the US dollar at March 31, 2026 by 10% and 20%, would have decreased (increased) pre-tax net loss by $63.1 million and $126.2 million, respectively. This analysis is based on the foreign currency exchange variation rate that the Company considered to be reasonably possible at the end of the period and excluding the impact of the derivatives below. The analysis assumes that all other variables, especially interest rates, are held constant.

The Company may use certain foreign exchange derivatives, including collars and forward contracts, to manage its foreign exchange risks. A summary of the Company's foreign exchange derivatives at March 31, 2026 is summarized as follows:

Notional Amount

Denomination

Weighted average floor

Weighted average cap / forward price

Maturities

$403.5 million

USD/BRL

5.54

6.34

April 2026 - December 2026

The aggregate fair value of the Company's foreign exchange derivatives was a net asset of $23.6 million (December 31, 2025 - net asset of $4.4 million).The fair values of foreign exchange contracts were determined based on option pricing models, forward foreign exchange rates, and information provided by the counter party.

The change in fair value of foreign exchange derivatives was a gain of $16.5 million for the three months ended March 31, 2026 (a gain of $16.8 million for the three months ended March 31, 2025), which has been recognized in foreign exchange gain.

In addition, during the three months ended March 31, 2026, the Company recognized a realized gain of $7.3 million (realized loss of $2.2 million for the three months ended March 31, 2025) related to the settlement of foreign currency forward collar contracts.

Interest rate risk

The Company is principally exposed to the variation in interest rates on loans and borrowings with variable rates of interest. Management reduces interest rate risk exposure by entering into loans and borrowings with fixed rates of interest or by entering into derivative instruments that fix the ultimate interest rate paid.

The Company is principally exposed to interest rate risk through its Senior Credit Facility and Brazilian Real denominated bank loans. Based on the Company’s net exposure at March 31, 2026, a 1% change in the variable rates would not materially impact its pre-tax annual net income.

Ero Copper Corp. March 31, 2026 MD&A | Page 18

Price risk

The Company may use derivatives, including forward contracts, collars and swap contracts, to manage commodity price risks.

At March 31, 2026, the Company had gold collar contracts on 5,000 ounces of gold per month from April 2026 to June 2026. These gold derivative contracts establish an average floor price of $3,800 per ounce of gold and an average cap price of $4,350 per ounce. As of March 31, 2026, the fair value of these contracts was a net liability of $8.3 million (December 31, 2025 - liability of $6.8 million). The fair value of gold collar contracts was determined based on option pricing models, forward gold price, and information provided by counter party.

During the three months ended March 31, 2026, the Company recognized an unrealized loss of $0.8 million (unrealized loss of $2.1 million for the three months ended March 31, 2025) and a $7.9 million realized loss (nil for the three months ended March 31, 2025) in relation to its commodity derivatives in other income or loss.

At March 31, 2026, the Company had provisionally priced sales that are exposed to commodity price changes. Based on the Company’s net exposure at March 31, 2026, a 10% change in the price of copper and gold would have changed pre-tax net income (loss) by $8.6 million.

For a discussion of additional risks applicable to the Company and its business and operations, including risks related to the Company’s foreign operations, the environment and legal proceedings, see “Risk Factors” in the Company’s AIF.

OTHER FINANCIAL INFORMATION

Off-Balance Sheet Arrangements

As at March 31, 2026, the Company had no material off-balance sheet arrangements.

Outstanding Share Data

As of May 4, 2026, the Company had 104,277,968 common shares issued and outstanding.

ACCOUNTING POLICIES, JUDGMENTS AND ESTIMATES

Critical Accounting Judgments and Estimates

The preparation of condensed consolidated interim financial statements in conformity with IFRS requires management to make judgments, estimates and assumptions about future events that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Although these estimates are based on management’s best knowledge of the amount, events or actions, actual results may differ from these estimates.

Ero Copper Corp. March 31, 2026 MD&A | Page 19

The Company’s material accounting policies and accounting estimates are contained in the Company’s consolidated financial statements for the year ended December 31, 2025. Judgements have been made in the determination of the functional currency of the Company and its subsidiaries, assessment of the probability of cash outflow related to legal claims and contingent liabilities and income taxes. Critical accounting estimates represent estimates that are uncertain and for which changes in those estimates could materially impact the consolidated financial statements. Key sources of estimation uncertainty, including those the Company believes to be critical accounting estimates, include derivative instruments, deferred revenue, carrying amounts of mineral properties, provision for mine closure and reclamation costs, expected credit losses and realization of value-added tax receivable. Certain of these estimates are dependent on mineral reserves and resource information. Changes in mineral reserves and resources could impact depreciation and depletion rates, asset carrying amounts and the timing of mine closure and reclamation costs. The Company determines its mineral reserves and resources based on information compiled by competent individuals. Information regarding mineral reserves and resources is used in the calculation of depreciation, depletion and determination, when applicable, of the recoverable amount of CGUs, and for forecasting the timing of reclamation and closure cost expenditures. There are numerous uncertainties inherent in the determination of mineral reserves, and assumptions that are valid at the time of determination may change significantly when new information becomes available. Changes in the methodology, forecasted prices of commodities, exchange rates, production costs or recovery rates may change the economic status of mineral reserves and may, ultimately, result in changes in the mineral reserves.

Management continuously reviews its estimates, judgments and assumptions on an ongoing basis using the most current information available. Revisions to estimates are recognized prospectively.

Ero Copper Corp. March 31, 2026 MD&A | Page 20

CAPITAL EXPENDITURES

The following table presents capital expenditures at the Company’s operations on an accrual basis.



	2026 - Q1		2025 - Q1
Caraíba Operations
Growth	$	11,142	$	11,149
Sustaining	24,804		21,436
Exploration	1,683		2,434
Deposit on Projects	621		(615)
Total, Caraíba Operations	$	38,250	$	34,404

Tucumã Operation
Growth	—		1,160
Sustaining	5,180		1,597
Capitalized ramp-up costs	—		12,005
Exploration	155		904
Deposit on Projects	485		(214)
Total, Tucumã Operation	$	5,820	$	15,452

Xavantina Operations
Growth	917		—
Sustaining	8,123		3,904
Exploration	1,405		845
Deposit on Projects	3,392		69
Total, Xavantina Operations	$	13,837	$	4,818

Corporate and Other
Growth	29		293
Sustaining	866		—
Exploration	5,474		2,642
Deposit on Projects	17		(8)
Total, Corporate and Other	$	6,386	$	2,927

Consolidated
Growth	12,088		12,602
Sustaining	38,973		26,937
Capitalized ramp-up costs	—		12,005
Exploration	8,717		6,825
Deposit on Projects	4,515		(768)
Total, Consolidated Capital Expenditures	$	64,293	$	57,601

Ero Copper Corp. March 31, 2026 MD&A | Page 21


	2026 - Q1		2025 - Q1
Total, Consolidated Capital Expenditures	$	64,293	$	57,601
Add (less):
Additions to exploration and evaluation assets	(5,682)		(3,109)
Additions to right-of-use assets	1,599		7,175
Capitalized depreciation	224		94

Total, additions per Mineral Properties, Plant and Equipment note	$	60,434	$	61,761

ALTERNATIVE PERFORMANCE (NON-IFRS) MEASURES

The Company utilizes certain alternative performance (non-IFRS) measures to monitor its performance, including copper C1 cash cost, realized copper price, gold C1 cash cost, gold AISC, realized gold price, EBITDA, adjusted EBITDA, adjusted net income attributable to owners of the Company, adjusted net income per share, net (cash) debt, working capital and available liquidity. These performance measures have no standardized meaning prescribed within generally accepted accounting principles under IFRS and, therefore, amounts presented may not be comparable to similar measures presented by other mining companies. These non-IFRS measures are intended to provide supplemental information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS. The tables below provide reconciliations of these non-IFRS measures to the most directly comparable IFRS measures as contained in the Company’s financial statements.

Unless otherwise noted, the non-IFRS measures presented below have been calculated on a consistent basis for the periods presented.

Copper C1 Cash Cost

Copper C1 cash cost is a non-IFRS performance measure used by the Company to manage and evaluate the performance of its copper mining operations.

Copper C1 cash cost is calculated as C1 cash costs divided by total pounds of copper produced during the period. C1 cash costs comprise the total cost of production, including expenses related to transportation, and treatment and refining charges. These costs are net of by-product credits and incentive payments.

While copper C1 cash cost is widely reported in the mining industry as a performance benchmark, it does not have a standardized meaning and is disclosed as a supplement to IFRS measures.

The following table provides a reconciliation of copper C1 cash cost to cost of production, its most directly comparable IFRS measure.

Ero Copper Corp. March 31, 2026 MD&A | Page 22

The Caraíba Operations


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Cost of production	$	62,352	$	55,895	$	35,719
Add (less):
Transportation costs & other	2,896		1,904		1,322
Treatment, refining, and other	2,164		3,328		2,410
By-product credits	(10,077)		(7,614)		(4,699)
Incentive payments	(1,534)		(1,516)		(1,289)
Net change in inventory	(1,483)		266		2,659
Foreign exchange translation and other	(87)		110		(147)
C1 cash costs	$	54,231	$	52,373	$	35,975


	2026 - Q1		2025 - Q4		2025 - Q1
Costs
Mining	$	42,411	$	38,482	$	25,796
Processing	9,102		8,867		6,352
Indirect	7,735		7,406		4,794
Production costs	59,248		54,755		36,942
By-product credits	(10,077)		(7,614)		(4,699)
Treatment, refining and other	5,060		5,232		3,732
C1 cash costs	$	54,231	$	52,373	$	35,975


	2026 - Q1		2025 - Q4		2025 - Q1











Costs per pound
Total copper produced (lbs, 000)	19,459		22,995		16,219

Mining	$	2.18	$	1.67	$	1.59
Processing	$	0.47	$	0.39	$	0.39
Indirect	$	0.40	$	0.32	$	0.30
By-product credits	$	(0.52)	$	(0.33)	$	(0.29)
Treatment, refining and other	$	0.26	$	0.22	$	0.23
Copper C1 cash costs	$	2.79	$	2.27	$	2.22

Ero Copper Corp. March 31, 2026 MD&A | Page 23

The Tucumã Operation(1)


Reconciliation:	2026 - Q1		2025 - Q4
Cost of production	$	29,738	$	29,689
Add (less):
Transportation costs & other	6,391		8,376
Treatment, refining, and other	2,471		—
By-product credits	(701)		—
Incentive payments	(546)		(396)
Net change in inventory	(556)		(1,970)

Foreign exchange translation and other	(4)		—
C1 cash costs	$	36,793	$	35,699

(1) The Company declared commercial production at the Tucumã Operation effective July 1, 2025. Tucumã Operation reflects costs from Q3 2025 onward only.


	2026 - Q1		2025 - Q4
Costs
Mining	$	6,538	$	6,110
Processing	17,976		17,253
Indirect	4,118		3,945
Production costs	28,632		27,308
By-product credits	(701)		—
Treatment, refining and other	8,862		8,391
C1 cash costs	$	36,793	$	35,699


	2026 - Q1		2025 - Q4











Costs per pound
Total copper produced (lbs, 000)	18,652		20,449

Mining	$	0.35	$	0.30
Processing	$	0.96	$	0.84
Indirect	$	0.22	$	0.19
By-product credits	$	(0.04)	$	—
Treatment, refining and other	$	0.48	$	0.42
Copper C1 cash costs	$	1.97	$	1.75

Ero Copper Corp. March 31, 2026 MD&A | Page 24

Total Copper Operations(1)


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Cost of production	$	92,090	$	85,584	$	35,719
Add (less):
Transportation costs & other	9,287		10,280		1,322
Treatment, refining, and other	4,635		3,328		2,410
By-product credits	(10,778)		(7,614)		(4,699)
Incentive payments	(2,080)		(1,912)		(1,289)
Net change in inventory	(2,039)		(1,704)		2,659

Foreign exchange translation and other	(91)		110		(147)
C1 cash costs	$	91,024	$	88,072	$	35,975


	2026 - Q1		2025 - Q4		2025 - Q1
Costs
Mining	$	48,949	$	44,592	$	25,796
Processing	27,078		26,120		6,352
Indirect	11,853		11,351		4,794
Production costs	87,880		82,063		36,942
By-product credits	(10,778)		(7,614)		(4,699)
Treatment, refining and other	13,922		13,623		3,732
C1 cash costs	$	91,024	$	88,072	$	35,975

(1) Total Copper Operations include Caraíba and Tucumã. C1 cash costs for periods prior to Q3 2025 exclude the Tucumã Operation, which achieved commercial production effective July 1, 2025


	2026 - Q1		2025 - Q4		2025 - Q1











Costs per pound
Total copper produced (lbs, 000)	38,111		43,444		16,219

Mining	$	1.28	$	1.03	$	1.59
Processing	$	0.71	$	0.60	$	0.39
Indirect	$	0.31	$	0.26	$	0.30
By-product credits	$	(0.28)	$	(0.18)	$	(0.29)
Treatment, refining and other	$	0.37	$	0.32	$	0.23
Copper C1 cash costs	$	2.39	$	2.03	$	2.22

Ero Copper Corp. March 31, 2026 MD&A | Page 25

Realized Copper Price

Realized copper price is a non-IFRS ratio which is calculated as gross copper revenue divided by pounds of copper sold during the period. Management believes measuring realized copper price enables investors to better understand performance based on realized copper sales in each reporting period.

The following tables provide a calculation of realized copper price and a reconciliation to copper segment.


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Copper revenue(1)	$	220,704	$	222,454	$	109,502
less: by-product credits	(10,778)		(7,614)		(5,252)
Net copper revenue	209,926		214,840		104,250
add: treatment, refining and other	4,635		5,586		2,489
add: royalty taxes	4,278		4,621		1,992
Gross copper revenue	218,839		225,047		108,731
Total copper sold in concentrate (lbs, 000)	39,586		44,388		26,712
Realized copper price	$	5.53	$	5.07	$	4.07

(1) Copper revenue includes provisional price and volume adjustments

Gold C1 Cash Cost and Gold AISC

Gold C1 cash cost is a non-IFRS performance measure used by the Company to manage and evaluate the operating performance of its gold mining segment and is calculated as C1 cash costs divided by total ounces of gold produced during the period. C1 cash cost includes total cost of production, net of by-product credits and incentive payments. Gold C1 cash cost is widely reported in the mining industry as benchmarks for performance but does not have a standardized meaning and is disclosed in supplemental to IFRS measures.

Gold AISC is an extension of gold C1 cash cost discussed above and is also a key performance measure used by management to evaluate operating performance of its gold mining segment. Gold AISC is calculated as AISC divided by total ounces of gold produced during the period. AISC includes C1 cash costs, site general and administrative costs, accretion of mine closure and rehabilitation provision, sustaining capital expenditures, sustaining leases, and royalties and production taxes. Gold AISC is widely reported in the mining industry as benchmarks for performance but does not have a standardized meaning and is disclosed in supplement to IFRS measures.

The following table provides a reconciliation of gold C1 cash cost and gold AISC to cost of production, its most directly comparable IFRS measure.

Ero Copper Corp. March 31, 2026 MD&A | Page 26


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Cost of production	$	13,877	$	12,882	$	6,225
Add (less):
Incentive payments	(320)		(442)		(269)
Net change in inventory	(807)		(208)		1,339
By-product credits	(189)		(459)		(111)
Smelting and refining and selling expenses	769		320		146
Gold concentrate re-handling cost	(1,641)		(1,444)		—
Foreign exchange translation and other	(38)		(44)		(29)
C1 cash costs	$	11,651	$	10,605	$	7,301
Site general and administrative	1,409		1,628		1,077
Accretion of mine closure and rehabilitation provision	145		152		141
Sustaining capital expenditure	8,136		7,091		3,909
Sustaining lease payments	2,623		3,073		2,021
Royalties and production taxes	434		995		338
AISC	$	24,398	$	23,544	$	14,787


	2026 - Q1		2025 - Q4		2025 - Q1
Costs
Mining	$	5,820	$	5,619	$	3,760
Processing	2,940		3,138		2,206
Indirect	2,311		1,987		1,300
Production costs	11,071		10,744		7,266
Smelting and refining costs	769		320		146
By-product credits	(189)		(459)		(111)
C1 cash costs	$	11,651	$	10,605	$	7,301
Site general and administrative	1,409		1,628		1,077
Accretion of mine closure and rehabilitation provision	145		152		141
Sustaining capital expenditure	8,136		7,091		3,909
Sustaining leases payments	2,623		3,073		2,021
Royalties and production taxes	434		995		338
AISC	$	24,398	$	23,544	$	14,787

Ero Copper Corp. March 31, 2026 MD&A | Page 27


Costs per ounce
Total gold produced (ounces)	5,495		13,837		6,638

Mining	$	1,059	$	406	$	566
Processing	$	535	$	227	$	332
Indirect	$	420	$	143	$	195
Smelting and refining	$	140	$	23	$	22
By-product credits	$	(34)	$	(33)	$	(16)
Gold C1 cash cost	$	2,120	$	766	$	1,100
Gold AISC	$	4,441	$	1,702	$	2,228

Realized Gold Price

Realized gold price is a non-IFRS ratio that is calculated as gross gold revenue divided by ounces of gold sold during the period. Management believes measuring realized gold price enables investors to better understand performance based on the realized gold sales in each reporting period. The following table provides a calculation of realized gold price and a reconciliation to gold segment revenues, its most directly comparable IFRS measure.


(in '000s except for ounces and price per ounce)	2026 - Q1		2025 - Q4		2025 - Q1
Xavantina revenue	$	42,466	$	97,699	$	15,586
less: by-product credits	(189)		(459)		(111)
Gold revenue, net	$	42,277	$	97,240	$	15,475
add: smelting, refining, and other charges	1,054		4,384		304

Gold revenue, gross	$	43,331	$	101,624	$	15,779
Spot (cash)	$	30,627	$	88,868	$	12,754
Stream (cash)	$	7,375	$	7,373	$	779
Stream (amortization of deferred revenue)	$	5,329	$	5,383	$	2,246

Total gold ounces sold	10,330		26,155		5,834
Spot	6,316		21,712		4,467
Stream	4,014		4,443		1,367

Realized gold price (per ounce)	$	4,195	$	3,885	$	2,705
Spot (cash)	$	4,849	$	4,093	$	2,855
Stream (cash)	$	1,837	$	1,659	$	570
Stream (amortization of deferred revenue)	$	1,328	$	1,212	$	1,643

Ero Copper Corp. March 31, 2026 MD&A | Page 28

Earnings before interest, taxes, depreciation, and amortization (“EBITDA”) and Adjusted EBITDA

EBITDA and adjusted EBITDA are non-IFRS performance measures used by management to evaluate its debt service capacity and performance of its operations. EBITDA represents earnings before finance expense, finance income, income taxes, depreciation and amortization. Adjusted EBITDA is EBITDA before the pre-tax effect of adjustments for non-cash and/or non-recurring items.

The following table provides a reconciliation of EBITDA and Adjusted EBITDA to net income, its most directly comparable IFRS measure.


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Net Income	$	109,311	$	78,738	$	80,627
Adjustments:
Finance expense	11,064		11,330		4,723
Finance income	(1,121)		(2,201)		(838)
Income tax expense	17,885		23,453		14,741
Amortization and depreciation	38,319		40,503		18,620
EBITDA	$	175,458	$	151,823	$	117,873
Foreign exchange (gain) loss	(53,655)		23,352		(58,400)
Share based compensation	2,640		8,909		1,173
Unrealized loss on commodity derivatives	751		1,597		2,102
Change in rehabilitation and closure provision(1)	—		556		—


Others	—		507		458
Adjusted EBITDA	$	125,194	$	186,744	$	63,206

(1) Change in rehabilitation and closure provision relates to revisions to rehabilitation and closure plans and cost estimates at the Company’s historic mining operations that have entered the closure phase, and for which there are no substantive future economic value. Such costs are reflected within other expenses on the Company's Consolidated Statements of Operations and Comprehensive (Loss) Income.

Adjusted net income attributable to owners of the Company and Adjusted net income per share attributable to owners of the Company

“Adjusted net income attributable to owners of the Company” is net income attributed to shareholders as reported, adjusted for certain types of transactions that, in management's judgment, are not indicative of our normal operating activities or do not necessarily occur on a recurring basis. “Adjusted net income per share attributable to owners of the Company” (“Adjusted EPS”) is calculated as "adjusted net income attributable to owners of the Company" divided by weighted average number of outstanding common shares in the period. The Company believes that, in addition to conventional measures prepared in accordance with IFRS, the Company and certain investor and analysts use these supplemental non-IFRS performance measures to evaluate the normalized performance of the Company. The presentation of Adjusted EPS is not meant to substitute the net income (loss) per share

Ero Copper Corp. March 31, 2026 MD&A | Page 29

attributable to owners of the Company (“EPS”) presented in accordance with IFRS, but rather it should be evaluated in conjunction with such IFRS measures.

The following table provides a reconciliation of Adjusted net income attributable to owners of the Company and Adjusted EPS to net income attributable to the owners of the Company, its most directly comparable IFRS measure.


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Net income as reported attributable to the owners of the Company	$	108,771	$	76,970	$	80,227
Adjustments:
Share based compensation	2,640		8,909		1,173
Unrealized foreign exchange (gain) loss on USD denominated balances in MCSA	(30,260)		19,289		(39,628)
Unrealized foreign exchange (gain) loss on foreign exchange derivative contracts	(16,464)		4,723		(16,739)
Unrealized loss on commodity derivatives	733		1,559		2,079

Change in rehabilitation and closure provision(1)	—		554		—

Others	—		504		458
Tax effect on the above adjustments	7,014		(4,061)		8,279
Adjusted net income attributable to owners of the Company	$	72,434	$	108,447	$	35,849

Weighted average number of common shares
Basic	104,262,136		103,961,272		103,564,654
Diluted	105,023,869		104,693,751		103,904,737

Adjusted EPS
Basic	$	0.69	$	1.04	$	0.35
Diluted	$	0.69	$	1.04	$	0.35

Net Debt

Net debt is a performance measure used by the Company to assess its financial position and ability to pay down its debt. Net debt is determined based on cash and cash equivalents, short-term investments, net of loans and borrowings as reported in the Company’s condensed consolidated interim financial statements. The following table provides a calculation of net (cash) debt based on amounts presented in the Company’s condensed consolidated interim financial statements as at the periods presented.

Ero Copper Corp. March 31, 2026 MD&A | Page 30


	March 31, 2026		December 31, 2025		March 31, 2025
Current portion of loans and borrowings	$	39,202	$	55,711	$	52,479
Long-term portion of loans and borrowings	542,691		551,403		589,860
Less:
Cash and cash equivalents	(91,207)		(105,442)		(80,573)


Net debt (cash)	$	490,686	$	501,672	$	561,766

Working Capital and Available Liquidity

Working capital is calculated as current assets less current liabilities as reported in the Company’s condensed consolidated interim financial statements. The Company uses working capital as a measure of the Company’s short-term financial health and ability to meet its current obligations using its current assets. Available liquidity is calculated as the sum of cash and cash equivalents, short-term investments and the undrawn amount available on its revolving credit facilities. The Company uses this information to evaluate the liquid assets available. The following table provides a calculation for these based on amounts presented in the Company’s condensed consolidated interim financial statements as at the periods presented.


	March 31, 2026		December 31, 2025		March 31, 2025
Current assets	$	290,299	$	276,212	$	232,292
Less: Current liabilities	(224,064)		(260,718)		(222,048)
Working capital	$	66,235	$	15,494	$	10,244

Cash and cash equivalents	91,207		105,442		80,573

Available undrawn revolving credit facilities(1)	55,000		45,000		35,000

Available liquidity	$	146,207	$	150,442	$	115,573

(1) In January 2025, the Company amended its Senior Credit Facility to increase the limit from $150.0 million to $200.0 million and extended the maturity from December 2026 to December 2028.

Ero Copper Corp. March 31, 2026 MD&A | Page 31

DISCLOSURE CONTROLS AND PROCEDURES AND INTERNAL CONTROL OVER FINANCIAL REPORTING

The Company’s management, with the participation of the President and CEO and Executive Vice President and CFO, is responsible for establishing and maintaining adequate disclosure controls and procedures (“DC&P”) and internal control over financial reporting (“ICFR”) using Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission ("COSO") as its internal control framework.

The Company’s DC&P are designed to provide reasonable assurance that material information related to the Company is identified and communicated on a timely basis.

The Company’s ICFR is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with IFRS. Any system of ICFR, no matter how well designed, has inherent limitations and cannot provide absolute assurance that all misstatements and instances of fraud, if any, within the Company have been prevented or detected. The Company’s ICFR is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with IFRS.

There were no changes in the Company’s DC&P and ICFR that materially affected, or are reasonably likely to materially affect, ICFR during the three months ended March 31, 2026.

NOTE REGARDING SCIENTIFIC AND TECHNICAL INFORMATION

Unless otherwise indicated, scientific and technical information in this MD&A relating to Ero’s properties (“Technical Information”) is based on information contained in the following:

The report prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI 43-101”) and entitled “2022 Mineral Resources and Mineral Reserves of the Caraíba Operations, Curaçá Valley, Bahia, Brazil”, dated December 22, 2022 with an effective date of September 30, 2022, prepared by Porfirio Cabaleiro Rodriguez, FAIG, Bernardo Horta de Cerqueira Viana, FAIG, Fábio Valério Câmara Xavier, MAIG and Ednie Rafael Moreira de Carvalho Fernandes, MAIG all of GE21 Consultoria Mineral Ltda. (“GE21”), Dr. Beck Nader, FAIG of BNA Mining Solutions (“BNA”) and Alejandro Sepulveda, Registered Member (#0293) (Chilean Mining Commission) of NCL Ingeniería y Construcción SpA (“NCL”) (the “Caraíba Operations Technical Report”). Each a “qualified person” and “independent” of the Company within the meanings of NI 43-101.

The report prepared in accordance with NI-43-101 and entitled "Technical Report on the Xavantina Operations, Mato Grosso, Brazil", dated December 19, 2025 with an effective date of June 30, 2025, prepared by Branca Horta de Almeida Abrantes, MAIG, Hugo Ribeiro de Andrade Filho, FAusIMM (CP), Leonardo de Moraes Soares, MAIG, Paulo Roberto Bergmann Moreira, FAusIMM and Porfirio Cabaleiro Rodriguez, FAIG, all of GE21. Each a "qualified person" and "independent" of the Company within the meanings of NI 43-101.

The report prepared in accordance with NI 43-101 and entitled “Boa Esperança Project NI 43-101 Technical Report on Feasibility Study Update”, dated November 12, 2021 with an effective date of August 31, 2021, prepared by Kevin Murray, P. Eng., Scott C. Elfen, P.E. (each of Ausenco Engineering Canada Inc.), Erin L. Patterson, P.E. (formerly employed by its affiliate Ausenco Engineering USA South Inc. and together with Ausenco Engineering Canada Inc., referred to as “Ausenco”), Carlos

Ero Copper Corp. March 31, 2026 MD&A | Page 32

Guzmán, FAusIMM RM CMC of NCL, and Emerson Ricardo Re, MSc, MBA, MAusIMM (CP) (No. 305892), Registered Member (No. 0138) (Chilean Mining Commission) and Resource Manager of the Company on the date of the report (now of HCM Consultoria Geologica Eireli (“HCM”)) (the “Tucumã Project Technical Report”). Each of Kevin Murray, P. Eng., Erin L. Patterson, P.E., Scott C. Elfen, P.E., Carlos Guzmán, FAusIMM RM CMC and Emerson Ricardo Re, MAusIMM (CP), is a “qualified person” of the Company within the meanings of NI 43-101 or, in the case of Erin L. Patterson, P.E., who is no longer employed by Ausenco, was a "qualified person" of the Company within the meanings of NI 43-101 on the date of the report. Each of Kevin Murray, P. Eng., Erin L. Patterson, P.E., Scott C. Elfen, P.E., and Carlos Guzmán, FAusIMM RM CMC is “independent” of the Company within the meanings of NI 43-101 or, in the case of Erin L. Patterson, P.E., was "independent" of the Company on the date of the report. Emerson Ricardo Re, MAusIMM (CP), as Resource Manager of the Company (on the date of the report and now of HCM), was not “independent” of the Company on the date of the report, within the meaning of NI 43-101.

The report prepared in accordance with NI 43-101 and entitled "Preliminary Economic Assessment for the Furnas Project, Para State, Brazil", dated March 30, 2026 with an effective date of February 23, 2026, prepared by João Estevão Jr., MAIG of SDPM Mining Consulting ("SDPM"), Enrique Alfonso Rubio Esquivel, Registered Member (No. 255) (Chilean Mining Commission), Luis Bernal Venegas, Registered Member (No. 415) (Chilean Mining Commission), and Ricardo Martín Miranda Díaz, Registered Member (No. 145) (Chilean Mining Commission), all of Redco Mining Consultants ("Redco"), and Cid Gonçalves Monteiro Filho, SME RM (04317974), MAIG (No. 8444), FAusIMM (No. 329148) Reserve and Resource Manager of the Company (the “Furnas Project Technical Report”). Each of João Estevão Jr., MAIG, Enrique Alfonso Rubio Esquivel, Registered Member (No. 255) (Chilean Mining Commission), Luis Bernal Venegas, Registered Member (No. 415) Chilean Mining Commission), Ricardo Martín Miranda Díaz, Registered Member (No. 145) (Chilean Mining Commission) and Cid Gonçalves Monteiro Filho, RM SME, FAusIMM, MAIG, is a “qualified person” of the Company within the meaning of NI 43-101. Each of Joao Estevao Jr., MAIG, Enrique Alfonso Rubio Esquivel, Registered Member (No. 255) (Chilean Mining Commission), Luis Bernal Venegas, Registered Member (No. 415) Chilean Mining Commission), Ricardo Martín Miranda Díaz, Registered Member (No. 145) (Chilean Mining Commission) is “independent” of the Company within the meaning of NI 43-101. Cid Gonçalves Monteiro Filho, RM SME, FAusIMM, MAIG, being the Resource and Reserve Manager of the Company, is not “independent” of the Company within the meaning of NI 43-101.

Reference should be made to the full text of the Caraíba Operations Technical Report, the Xavantina Operations Technical Report, the Tucumã Project Technical Report, and the Furnas Project Technical Report, each of which is available for review on the Company's website at www.ero.com and under the Company’s profile on SEDAR+ at www.sedarplus.ca, and EDGAR at www.sec.gov.

The disclosure of Technical Information in this MD&A has been reviewed and approved by Cid Gonçalves Monteiro Filho, SME RM (04317974), MAIG (No. 8444), FAusIMM (No. 329148) and Mineral Resources and Reserves Manager of the Company who is a “qualified person” within the meanings of NI 43-101.

Cautionary Note Regarding Forward-Looking Statements

This MD&A contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation (collectively, “forward-looking statements”). Forward-

Ero Copper Corp. March 31, 2026 MD&A | Page 33

looking statements include statements that use forward-looking terminology such as “may”, “could”, “would”, “will”, “should”, “intend”, “target”, “plan”, “expect”, “budget”, “estimate”, “forecast”, “schedule”, “anticipate”, “believe”, “continue”, “potential”, “view” or the negative or grammatical variation thereof or other variations thereof or comparable terminology. Forward-looking statements may include, but are not limited to, statements with respect to the Company’s production, operating cost and capital expenditure guidance; targeting additional mineral resources and expansion of deposits; capital and operating cost estimates and economic analyses (including cash flow projections), including those from the Caraíba Operations Technical Report, the Xavantina Operations Technical Report the Tucumã Project Technical Report and the Furnas Project Technical Report; the Company’s expectations, strategies and plans for the Caraíba Operations, the Xavantina Operations and the Tucumã Operation, including the Company’s planned exploration, development, construction and production activities; the Company's plans for the Furnas Project; the results of future exploration and drilling; estimated completion dates for certain milestones; successfully adding or upgrading mineral resources (including the Company's expectations associated with the stockpiled gold concentrates at the Xavantina Operations) and successfully developing new deposits; the Company's ability to monetize gold concentrates produced at the Xavantina Operations, including the expected tonnes of gold concentrate to be sold and associated grade per tonne; the costs and timing of future exploration, development and construction; the timing and amount of future production at the Caraíba Operations, the Xavantina Operations and the Tucumã Operation; expectations regarding the Company's ability to manage risks related to future copper and gold price fluctuations and volatility; future financial or operating performance and condition of the Company and its business, operations and properties, including expectations regarding liquidity, capital structure, competitive position and payment of dividends; expectations regarding future currency exchange rates; expected concentrate treatment and refining charges; gold by-product credits and USD to BRL exchange rate; and any other statement that may predict, forecast, indicate or imply future plans, intentions, levels of activity, results, performance or achievements.

Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual results, actions, events, conditions, performance or achievements to materially differ from those expressed or implied by the forward-looking statements, including, without limitation, risks discussed in this MD&A and in the AIF under the heading “Risk Factors”. The risks discussed in this MD&A and in the AIF are not exhaustive of the factors that may affect any of the Company’s forward-looking statements. Although the Company has attempted to identify important factors that could cause actual results, actions, events, conditions, performance or achievements to differ materially from those contained in forward-looking statements, there may be other factors that cause results, actions, events, conditions, performance or achievements to differ from those anticipated, estimated or intended.

Forward-looking statements are not a guarantee of future performance. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Forward-looking statements involve statements about the future and are inherently uncertain, and the Company’s actual results, achievements or other future events or conditions may differ materially from those reflected in the forward-looking statements due to a variety of risks, uncertainties and other factors, including, without limitation, those referred to herein and in the AIF under the heading “Risk Factors”.

Ero Copper Corp. March 31, 2026 MD&A | Page 34

other things: favourable equity and debt capital markets; the ability to raise any necessary additional capital on reasonable terms to advance the production, development and exploration of the Company’s properties and assets; future prices of copper, gold and other metal prices; the timing and results of exploration and drilling programs; the accuracy of any mineral reserve and mineral resource estimates; the geology of the Caraíba Operations, the Xavantina Operations and the Tucumã Operation being as described in the respective technical report for each property; production costs; the accuracy of budgeted exploration, development and construction costs and expenditures; the price of other commodities such as fuel; future currency exchange rates, interest rates and tariff rates; operating conditions being favourable such that the Company is able to operate in a safe, efficient and effective manner; work force continuing to remain healthy in the face of prevailing epidemics, pandemics or other health risks, political and regulatory stability; the receipt of governmental, regulatory and third party approvals, licenses and permits on favourable terms; obtaining required renewals for existing approvals, licenses and permits on favourable terms; requirements under applicable laws; sustained labour stability; stability in financial and capital goods markets; availability of equipment; positive relations with local groups and the Company’s ability to meet its obligations under its agreements with such groups; and satisfying the terms and conditions of the Company’s current loan arrangements. Although the Company believes that the assumptions inherent in forward-looking statements are reasonable as of the date of this MD&A, these assumptions are subject to significant business, social, economic, political, regulatory, competitive and other risks and uncertainties, contingencies and other factors that could cause actual actions, events, conditions, results, performance or achievements to be materially different from those projected in the forward-looking statements. The Company cautions that the foregoing list of assumptions is not exhaustive. Other events or circumstances could cause actual results to differ materially from those estimated or projected and expressed in, or implied by, the forward-looking statements contained in this MD&A.

Forward-looking statements contained herein are made as of the date of this MD&A and the Company disclaims any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or results or otherwise, except as and to the extent required by applicable securities laws.

Cautionary Notes Regarding Mineral Resource and Reserve Estimates

Unless otherwise indicated, all reserve and resource estimates included in this MD&A and the documents incorporated by reference herein have been prepared in accordance with Canadian NI 43-101 and the Canadian Institute of Mining, Metallurgy and Petroleum (the “CIM”) — CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the CIM Council, as amended (the “CIM Standards”). NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. Canadian standards, including NI 43-101, differ significantly from the requirements of the United States Securities and Exchange Commission (the “SEC”), and reserve and resource information included herein may not be comparable to similar information disclosed by U.S. companies.

ADDITIONAL INFORMATION

Additional information about Ero and its business activities, including the AIF, is available is available on the Company’s website at www.ero.com, and under the Company’s profile at www.sedarplus.ca and www.sec.gov.

Ero Copper Corp. March 31, 2026 MD&A | Page 35

CONDENSED CONSOLIDATED INTERIM

FINANCIAL STATEMENTS

FOR THE THREE MONTHS ENDED

MARCH 31, 2026 AND 2025


Ero Copper Corp.
Table of Contents


CONSOLIDATED FINANCIAL STATEMENTS

Condensed Consolidated Statements of Financial Position			1
Condensed Consolidated Statements of Operations and Comprehensive Income			2
Condensed Consolidated Statements of Cash Flow			3
Condensed Consolidated Statements of Changes in Shareholders' Equity			4

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

General
Note 1. Nature of Operations			5
Note 2. Basis of Preparation			5

Note 3. Segment Disclosure			6

Statements of Financial Position
Note 4. Inventories			9
Note 5. Other Current Assets			9
Note 6. Mineral Properties, Plant and Equipment			10
Note 7. Exploration and Evaluation Assets			11
Note 8. Deposits and Other Non-current Assets			11
Note 9. Accounts Payable and Accrued Liabilities			12
Note 10. Loans and Borrowings			12
Note 11. Deferred Revenue			14

Note 12. Other Non-current Liabilities			15
Note 13. Share Capital			16

Statements of Earnings
Note 14. Revenue			20
Note 15. Cost of Sales			21
Note 16. General and Administrative Expenses			21
Note 17. Finance Expense			22
Note 18. Foreign Exchange Gain			22


Other Items

Note 19. Financial Instruments			22

Note 20. Supplemental Cash Flow Information			24


Ero Copper Corp.
Condensed Consolidated Statements of Financial Position
(Unaudited, Amounts in thousands of US Dollars)


	Notes	March 31, 2026		December 31, 2025
ASSETS
Current
Cash and cash equivalents		$	91,207	$	105,442

Trade receivables		48,064		41,061
Inventories	4	107,741		107,111

Other current assets	5	43,287		22,598
		290,299		276,212
Non-Current
Mineral properties, plant and equipment	6	1,682,324		1,574,054
Exploration and evaluation assets	7	41,368		33,869
Deferred income tax assets		2,725		3,047
Deposits and other non-current assets	8	38,354		36,696
		1,764,771		1,647,666
Total Assets		$	2,055,070	$	1,923,878

LIABILITIES
Current
Accounts payable and accrued liabilities	9	$	147,694	$	154,124
Current portion of loans and borrowings	10	39,202		55,711
Current portion of deferred revenue	11	10,917		12,800
Income taxes payable		2,861		14,675
Current portion of derivatives	19	8,345		7,125
Current portion of lease liabilities		15,045		16,283
		224,064		260,718
Non-Current
Loans and borrowings	10	542,691		551,403
Deferred revenue	11	91,446		92,950
Provision for rehabilitation and closure costs		23,958		21,978
Deferred income tax liabilities		22,183		10,729
Lease liabilities		6,499		8,950
Other non-current liabilities	12	42,847		39,288
		729,624		725,298
Total Liabilities		953,688		986,016

SHAREHOLDERS’ EQUITY
Share capital	13	300,160		298,490
Equity reserves		(55,694)		(107,735)
Retained earnings		853,549		744,778
Equity attributable to owners of the Company		1,098,015		935,533
Non-controlling interests		3,367		2,329
		1,101,382		937,862
Total Liabilities and Equity		$	2,055,070	$	1,923,878

Commitments (Notes 7 and 11)

APPROVED ON BEHALF OF THE BOARD:

"Makko DeFilippo"

, President, CEO and Director

"Jill Angevine"

, Director

The accompanying notes are an integral part of these condensed consolidated interim financial statements Page 1


Ero Copper Corp.
Condensed Consolidated Statements of Operations and Comprehensive Income
(Unaudited, Amounts in thousands of US Dollars, except share and per share amounts)



		Three months ended March 31,
	Notes		2026		2025

Revenue	14		$	263,170	$	125,088
Cost of sales	15		(157,256)		(69,566)
Gross profit			105,914		55,522

Expenses
General and administrative	16		(11,058)		(11,371)
Share-based compensation	13 (e)		(2,640)		(1,173)

Operating Income			92,216		42,978
Finance income			1,121		838
Finance expense	17		(11,064)		(4,723)
Foreign exchange gain	18		53,655		58,400

Other expenses			(8,732)		(2,125)
Income before income taxes			127,196		95,368

Current income tax expense			(7,197)		(3,718)
Deferred income tax expense			(10,688)		(11,023)
Income tax expense			(17,885)		(14,741)
Net income for the period			$	109,311	$	80,627

Other comprehensive gain
Foreign currency translation gain			51,881		45,775
Comprehensive income			$	161,192	$	126,402

Net income attributable to:
Owners of the Company			108,771		80,227
Non-controlling interests			540		400
			$	109,311	$	80,627

Comprehensive income attributable to:
Owners of the Company			160,154		125,555
Non-controlling interests			1,038		847
			$	161,192	$	126,402

Net income per share attributable to owners of the Company
Basic	13 (f)		$	1.04	$	0.77
Diluted	13 (f)		$	1.04	$	0.77

Weighted average number of common shares outstanding
Basic	13 (f)		104,262,136		103,564,654
Diluted	13 (f)		105,023,869		103,904,737

The accompanying notes are an integral part of these condensed consolidated interim financial statements Page 2


Ero Copper Corp.
Condensed Consolidated Statements of Cash Flow
(Unaudited, Amounts in thousands of US Dollars)



		Three months ended March 31,
	Notes		2026		2025
Cash Flows from Operating Activities
Net income for the period			$	109,311	$	80,627
Adjustments for:
Amortization and depreciation			38,319		18,620
Income tax expense			17,885		14,741
Amortization of deferred revenue	11		(5,329)		(2,246)

Share-based compensation	13 (e)		2,640		1,173
Finance income			(1,121)		(838)
Finance expenses	17		11,064		4,723
Foreign exchange gain			(48,353)		(57,464)

Other			9,193		2,192
Changes in non-cash working capital items	20		(24,131)		(42,766)






			109,478		18,762
Advances from customers	11		—		50,000
Derivative contract settlements			(2,411)		(2,216)
Provision settlements			(643)		(742)
Income taxes paid			(13,667)		(364)
			92,757		65,440

Cash Flows used in Investing Activities
Additions to mineral properties, plant and equipment			(55,777)		(56,430)
Additions to exploration and evaluation assets			(5,036)		(3,109)
Interest received			695		517

			(60,118)		(59,022)

Cash Flows used in Financing Activities


Lease liability payments			(5,178)		(4,003)
New loans and borrowings, net of transaction costs	10		2,730		55,266
Loans and borrowings repaid	10		(21,431)		(9,502)
Interest paid on loans and borrowings	10		(16,841)		(16,927)
Other finance expenses paid			(2,965)		(2,050)
Proceeds from exercise of stock options			1,138		207
			(42,547)		22,991

Effect of exchange rate changes on cash and cash equivalents			(4,327)		762
Net (decrease) increase in cash and cash equivalents			(14,235)		30,171
Cash and cash equivalents - beginning of period			105,442		50,402
Cash and cash equivalents - end of period			$	91,207	$	80,573

Supplemental cash flow information (note 20)

The accompanying notes are an integral part of these condensed consolidated interim financial statements Page 3


Ero Copper Corp.
Condensed Consolidated Statements of Changes in Shareholders' Equity
(Unaudited, Amounts in thousands of US Dollars, except share and per share amounts)


		Share Capital			Equity Reserves
	Notes	Number of shares	Amount		Contributed Surplus		Foreign Exchange		Retained Earnings		Total		Non-controlling interest		Total equity

Balance, December 31, 2024		103,555,211	$	286,548	$	8,181	$	(188,653)	$	481,055	$	587,131	$	3,943	$	591,074
Income for the period		—	—		—		—		80,227		80,227		400		80,627
Other comprehensive income for the period		—	—		—		45,328		—		45,328		447		45,775
Total comprehensive income for the period		—	—		—		45,328		80,227		125,555		847		126,402
Shares issued for:

Exercise of options		16,296	316		(109)		—		—		207		—		207
Settlement of restricted share units		559	10		(22)		—		—		(12)		—		(12)

Share-based compensation	13 (e)	—	—		1,009		—		—		1,009		—		1,009


Balance, March 31, 2025		103,572,066	$	286,874	$	9,059	$	(143,325)	$	561,282	$	713,890	$	4,790	$	718,680


Balance, December 31, 2025		104,192,288	$	298,490	$	7,335	$	(115,070)	$	744,778	$	935,533	$	2,329	$	937,862
Income for the period		—	—		—		—		108,771		108,771		540		109,311
Other comprehensive income for the period		—	—		—		51,383		—		51,383		498		51,881
Total comprehensive income for the period		—	—		—		51,383		108,771		160,154		1,038		161,192
Shares issued for:

Exercise of options		84,178	1,648		(510)		—		—		1,138		—		1,138
Settlement of restricted share units		1,502	22		(33)		—		—		(11)		—		(11)

Share-based compensation	13 (e)	—	—		1,201		—		—		1,201		—		1,201

Balance, March 31, 2026		104,277,968	$	300,160	$	7,993	$	(63,687)	$	853,549	$	1,098,015	$	3,367	$	1,101,382

The accompanying notes are an integral part of these condensed consolidated interim financial statements Page 4


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

1. Nature of Operations

Ero Copper Corp. (“Ero" or the "Company") was incorporated on May 16, 2016 under the Business Corporations Act (British Columbia) and maintains its head office at Suite 1050, 625 Howe Street, Vancouver, British Columbia, Canada, V6C 2T6. The Company’s shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol “ERO”.

The Company’s primary asset is its 99.6% ownership interest in Mineração Caraíba S.A. (“MCSA”), held indirectly through its wholly-owned subsidiary, Ero Brasil Participações Ltda. The Company also currently owns a 97.6% ownership interest in NX Gold S.A. (“NX Gold”) indirectly through its wholly-owned subsidiary, Ero Gold Corp. (“Ero Gold”).

MCSA is a Brazilian copper company which holds a 100% interest in the Caraíba Operations, located in the State of Bahia, and the Tucumã Operation, located in the southeastern part of the State of Pará. MCSA’s predominant activity is the production and sale of copper concentrates, with gold and silver produced and sold as by-products.

NX Gold is a Brazilian gold mining company which holds a 100% interest in the Xavantina Operations and is focused on the production and sale of gold dore and concentrate as its main product and silver as its by-product. The Xavantina Operations are located approximately 18 kilometers west of the town of Nova Xavantina, in southeastern State of Mato Grosso, Brazil.

2. Basis of Preparation

(a) Statement of Compliance

These condensed consolidated interim financial statements have been prepared in accordance with International Accounting Standards (“IAS”) 34, Interim Financial Reporting and follow the same accounting policies and methods of application as the Company’s most recent annual consolidated financial statements for the year ended December 31, 2025.

These condensed consolidated interim financial statements do not include all of the information required for full consolidated annual financial statements and should be read in conjunction with the consolidated financial statements of the Company as at and for the year ended December 31, 2025, prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

These condensed consolidated interim financial statements were authorized for issue by the Board of Directors of the Company (the “Board”) on May 4, 2026.

(b) Use of Estimates and Judgments

In preparing these condensed consolidated interim financial statements, management has made judgments, estimates and assumptions that affect the application of the Company’s accounting policies and the reported amounts of assets, liabilities, income and expense. Actual results may differ. Significant judgments made by management in applying the Company’s accounting policies and key sources of estimation uncertainty were the same as those applied in the most recent annual audited consolidated financial statements for the year ended December 31, 2025.

Notes to Financial Statements | Page 5


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

On January 1, 2026, the Company adopted the amendments to the classification and measurement requirements for financial instrument in IFRS 9 Financial Instrument ("IFRS 9"), which was published in May 2024 by IASB. The amendments clarify that a financial assets is derecognized on the date on which the contractual rights to the cash flows expire or the asset is transferred. A financial liability is derecognized on the settlement date, which is the date on which the liability is extinguished. The amendments to IFRS 9 introduced an election that permits the Company, when settling a financial liability or part of a financial liability in cash using an electronic payment system, to deem the financial liability, or part of it, to be discharged before the settlement date if the Company has initiated a payment instruction that resulted in: (a) the Company having no practical ability to withdraw, stop or cancel the payment instruction; (b) the Company having no practical ability to access the cash to be used for settlement as a result of the payment instruction; and (c) the settlement risk associated with the electronic payment system being insignificant. The amendments clarify that unless the above election applies, a financial liability is derecognized on the settlement date, which is the date on which the liability is extinguished because the obligation specified in the contract is discharged or cancelled or expires. The adoption of the amendments did not have a material impact on the Company's condensed consolidated interim financial statements.

3. Segment Disclosure

Operating segments are determined by the way information is reported and used by the Company's Chief Operating Decision Maker ("CODM") to review operating performance. The Company monitors the operating results of its operating segments independently for the purpose of making decisions about resource allocation and performance assessment.

The Company’s reporting segments include its three operating mines in Brazil, the Caraíba Operations, the Tucumã Operation, and the Xavantina Operations, and its corporate head office in Canada. Significant information relating to the Company's reportable segments is summarized in the tables below:

Notes to Financial Statements | Page 6


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)


Three months ended March 31, 2026	Caraíba (Brazil)		Tucumã (Brazil)		Xavantina (Brazil)		Corporate and Other		Consolidated

Revenue	$	118,526	$	102,178	$	42,466	$	—	$	263,170

Cost of production	(62,352)		(29,738)		(13,877)		—		(105,967)
Depreciation and depletion	(20,981)		(11,985)		(5,001)		—		(37,967)
Sales expense	(3,338)		(7,811)		(2,173)		—		(13,322)

Cost of sales	(86,671)		(49,534)		(21,051)		—		(157,256)

Gross profit	31,855		52,644		21,415		—		105,914

Expenses
General and administrative	(4,519)		(2,136)		(1,543)		(2,860)		(11,058)
Share-based compensation	—		—		—		(2,640)		(2,640)

Operating income (loss)	$	27,336	$	50,508	$	19,872	$	(5,500)	$	92,216










Capital expenditures(1)	38,250		5,820		13,837		6,386		64,293

Assets
Current	$	109,499	$	122,655	$	38,042	$	20,103	290,299
Non-current	1,090,486		496,799		134,379		43,107		1,764,771
Total Assets	$	1,199,985	$	619,454	$	172,421	$	63,210	$	2,055,070
Total Liabilities	$	151,149	$	40,566	$	157,252	$	604,721	$	953,688

(1) Capital expenditures include additions to mineral properties, plant and equipment and additions to exploration and evaluation asset, net of non-cash additions such as change in estimates to mine closure costs, capitalized depreciation expense, capitalized borrowing costs, and additions of right-of-use assets.

During the three months ended March 31, 2026, the Company had seven significant customers (March 31, 2025 - five), including four copper customers (March 31, 2025 - three) and three gold customers (March 31, 2025 - two).

Notes to Financial Statements | Page 7


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)


Three months ended March 31, 2025	Caraíba (Brazil)		Tucumã (Brazil)		Xavantina (Brazil)		Corporate and Other		Consolidated

Revenue	$	63,270	$	46,232	$	15,586	$	—	$	125,088

Cost of production	(35,719)		(5,522)		(6,225)		—		(47,466)
Depreciation and depletion	(14,646)		(45)		(3,555)		—		(18,246)
Sales expense	(1,376)		(2,203)		(275)		—		(3,854)

Cost of sales	(51,741)		(7,770)		(10,055)		—		(69,566)

Gross profit	11,529		38,462		5,531		—		55,522

Expenses
General and administrative	(4,622)		(1,423)		(1,687)		(3,639)		(11,371)
Share-based compensation	—		—		—		(1,173)		(1,173)

Operating income (loss)	$	6,907	$	37,039	$	3,844	$	(4,812)	$	42,978









Capital expenditures(1)	34,404		15,452		4,818		2,927		57,601

Assets
Current	$	69,500	$	90,080	$	66,547	$	6,165	232,292
Non-current	893,825		450,363		93,496		15,720		1,453,404
Total Assets	$	963,325	$	540,443	$	160,043	$	21,885	$	1,685,696
Total Liabilities	$	171,637	$	64,136	$	134,277	$	596,966	967,016

Notes to Financial Statements | Page 8


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

4. Inventories


	March 31, 2026		December 31, 2025
Supplies and consumables	$	59,803	$	54,504
Stockpiles	33,030		33,925
Work in progress	4,234		5,197

Finished goods	10,674		13,485
	$	107,741	$	107,111

5. Other Current Assets


	March 31, 2026		December 31, 2025
Advances to suppliers	$	4,648	$	3,643
Prepaid expenses and other	8,794		5,845
Derivatives (Note 19)	23,586		4,701
Note receivable (Note 19)	570		405
Value added taxes recoverable	5,689		8,004

	$	43,287	$	22,598

Notes to Financial Statements | Page 9


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

6. Mineral Properties, Plant and Equipment


	Buildings		Mining Equipment		Mineral Properties(1)		Projects in Progress(2)		Equipment & Other Assets		Deposit on Projects		Mine Closure Costs		Right-of-Use Assets		Total
Cost:







Balance, December 31, 2025	94,382		496,976		1,012,282		338,705		34,956		2,773		19,071		76,505		2,075,650
Additions	495		4,346		28,082		20,182		78		5,652		—		1,599		60,434
Capitalized borrowing costs	—		—		—		4,913		—		—		—		—		4,913

Disposals	—		(1,205)		—		—		(5)		(3)		—		(2,129)		(3,342)		1
Transfers	7,618		3,211		32,361		(42,108)		47		(1,129)		—		—		—
Foreign exchange	5,202		27,125		54,882		14,376		1,813		185		1,039		4,086		108,708
Balance, March 31, 2026	$	107,697	$	530,453	$	1,127,607	$	336,068	$	36,889	$	7,478	$	20,110	$	80,061	$	2,246,363

Accumulated depreciation:




Balance, December 31, 2025	(13,112)		(121,910)		(293,864)		—		(12,579)		—		(7,461)		(52,670)		(501,596)
Depreciation expense	(1,968)		(13,184)		(15,436)		—		(703)		—		(297)		(4,740)		(36,328)
Disposals	—		607		—		—		1		—		—		751		1,359
Foreign exchange	(729)		(6,735)		(16,127)		—		(624)		—		(409)		(2,850)		(27,474)
Balance, March 31, 2026	$	(15,809)	$	(141,222)	$	(325,427)	$	—	$	(13,905)	$	—	$	(8,167)	$	(59,509)	$	(564,039)

Net book value, December 31, 2025	$	81,270	$	375,066	$	718,418	$	338,705	$	22,377	$	2,773	$	11,610	$	23,835	$	1,574,054
Net book value, March 31, 2026	$	91,888	$	389,231	$	802,180	$	336,068	$	22,984	$	7,478	$	11,943	$	20,552	$	1,682,324

(1) Mineral properties as at March 31, 2026 include $71.5 million (December 31, 2025 - $64.7 million) of costs on expansion of near-mine resource potential which are not currently being depreciated.

Notes to Financial Statements | Page 10


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

7. Exploration and Evaluation Assets

As at March 31, 2026, the Company had $41.4 million (December 31, 2025 - $33.9 million) in exploration and evaluation assets, which include several property option agreements.

In July 2024, the Company signed a definitive earn-in agreement (the "Agreement") with Salobo Metais S.A, a subsidiary of Vale Base Metals ("VBM"), for the Furnas Copper-Gold Project ("Furnas Project") located in the Carajás Mineral Province in Pará State, Brazil. The Agreement contemplates the Company earning a 60% interest in the Project upon completion of three phases of work:

•Phase 1: Ero to conduct a minimum of 28,000 meters of exploration drilling (completed) and produce a scoping study within 18 months of signing the Agreement (completed)

•Phase 2: Ero to conduct an additional minimum of 17,000 meters of exploration drilling (completed) and produce a pre-feasibility study within 18 months of completing Phase 1

•Phase 3: Ero to conduct an additional minimum of 45,000 meters of exploration drilling, unless otherwise mutually agreed, and produce a definitive feasibility study ("DFS") within 24 months of completing Phase 2

Following the completion of a DFS, subject to customary technical review periods, and with Ero positive investment approval, the parties will enter into a joint venture agreement whereby VBM will transfer 60% of the equity interest in the Furnas Project to Ero, and Ero will grant VBM a "free carry" on certain capital expenditures related to development of the Furnas Project.

Prior to a positive Ero investment decision and the formation of a joint venture, VBM will retain 100% ownership of the Furnas Project with Ero solely responsible for funding the phased exploration and engineering work programs as well as ongoing payments to maintain the property in good standing.

As at March 31, 2026, exploration and evaluation assets include $30.5 million (December 31, 2025 - $24.1 million) in expenditures associated with the Furnas Project.

8. Deposits and Other Non-current Assets


	March 31, 2026		December 31, 2025
Value added taxes recoverable	$	22,011	$	21,015
Note receivable (Note 19)	13,994		12,998
Deposits and others	2,349		2,683
	$	38,354	$	36,696

Notes to Financial Statements | Page 11


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

9. Accounts Payable and Accrued Liabilities


	March 31, 2026		December 31, 2025
Trade suppliers	$	92,900	$	92,283
Payroll and labour related liabilities	18,105		25,688
Value added tax, royalty and other tax payable	12,267		10,692
Cash-settled equity awards (Note 13(b) and (c))	20,119		20,615

Provision for rehabilitation and closure costs	3,330		3,768
Other accrued liabilities	973		1,078
	$	147,694	$	154,124

10. Loans and Borrowings


							Carrying value, including accrued interest
Description	Currency	Security	Maturity (Months)	Coupon rate	Principal to be repaid		March 31, 2026		December 31, 2025
Senior Notes	USD	Unsecured	46	6.50%	$	400,000	$	398,839	$	405,092
Senior credit facility	USD	Secured	33	SOFR + 2.00% to 4.25%	145,000		144,784		154,706
Copper Prepayment Facility	USD	Secured	9	8.66%	27,381		29,619		39,087
Equipment finance loans	USD	Secured	10 - 39	6.90% - 8.35%	5,481		5,542		7,319
Equipment finance loans	EUR	Secured	3 - 38	5.25% - 7.70%	2,568		2,568		168
Equipment finance loans	BRL	Unsecured	2	16.63%	29		36		84
Bank loan	BRL	Unsecured	8	CDI + 0.50%	501		505		658
Total					$	580,960	$	581,893	$	607,114

Current portion							$	39,202	$	55,711
Non-current portion							$	542,691	$	551,403

Notes to Financial Statements | Page 12


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

The movements in loans and borrowings are comprised of the following:


	Three months ended March 31, 2026										Year ended December 31, 2025
	Senior Notes		Senior Credit Facility		Copper Prepayment Facility		Other		Consolidated		Consolidated
Balance, beginning of period	$	405,092	$	154,706	$	39,087	$	8,229	$	607,114	$	602,189
Proceeds from loans and borrowings			—		—		2,730		2,730		57,404
Principal payments	—		(10,000)		(9,127)		(2,304)		(21,431)		(54,740)
Interest payments	(13,000)		(2,537)		(1,106)		(198)		(16,841)		(42,736)
Interest costs, including interest capitalized	6,747		2,615		765		161		10,288		44,487


Foreign exchange	—		—		—		33		33		510
Balance, end of period	$	398,839	$	144,784	$	29,619	$	8,651	$	581,893	$	607,114

(a) Senior Notes

In February 2022, the Company issued $400 million aggregate principal amount of senior unsecured notes (the “Senior Notes”). The Company received net proceeds of $392.0 million after transaction costs of $8.0 million. The Senior Notes mature on February 15, 2030 and bear annual interest at 6.5%, payable semi-annually in February and August of each year.

MCSA and Ero Brasil Participações have provided a guarantee of the Senior Notes on a senior unsecured basis. The Senior Notes are direct, senior obligations of the Company and MCSA, and are not secured by any mortgage, pledge or charge.

The Company has the option to redeem, in whole or in part, the Senior Notes at a price ranging from 103.25% to 100% of the principal amount together with accrued and unpaid interest, if any, to the date of redemption, with the rate decreasing based on the length of time the Senior Notes are outstanding.

Upon the occurrence of specific kinds of changes of control triggering events, each holder of the Senior Notes will have the right to cause the Company to repurchase some or all of its Senior Notes at 101% of their principal amount, plus accrued and unpaid interest to, but not including, the repurchase date.

The Senior Notes are recognized as financial liabilities, net of unamortized transaction costs, and measured at amortized cost using an effective interest rate of 6.7%.

(b) Senior Revolving Credit Facility

The Company has a senior revolving credit facility (the "Senior Revolving Credit Facility") which has a borrowing limit of $200 million and matures in December 2028. The applicable interest margin is based on sliding scales of SOFR plus 2.00% to 4.25%, and commitment fee ranges from 0.45% to 0.96%, based on the Company's net leverage ratio, with lower leverage ratios resulting in lower pricing.

As at March 31, 2026, the Senior Revolving Credit Facility bears a weighted average interest rate of 6.77% on its drawn balance and a commitment fee of 0.68% on its undrawn balance.

Notes to Financial Statements | Page 13


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

The Senior Revolving Credit Facility is secured by the shares of MCSA, NX Gold and Ero Gold. The Company is required to comply with certain financial covenants, which are required to be tested at each quarter end. These covenants include (a) a net leverage ratio based on net indebtedness to rolling four quarters adjusted earnings before interest, taxes, depreciation and amortization ("Rolling EBITDA"); (b) a net leverage ratio based on net senior indebtedness to Rolling EBITDA; and (c) an interest coverage ratio based on Rolling EBITDA. The Amended Senior Credit Facility provides for negative covenants customary for this type of facilities and permits additional equipment debt and finance leases of up to $50.0 million. As at March 31, 2026, the Company is in compliance with these financial covenants.

In May 2024, the Company entered into a non-priced copper prepayment facility with a bank syndicate. Under this facility, the Company received net proceeds of $49.6 million, representing gross proceeds of $50.0 million less transaction costs of $0.4 million. The Company had the option to increase the size of the non-priced copper prepayment facility from $50.0 million to $75.0 million until March 31, 2025.

In exchange, the Company is obligated to repay the $50.0 million facility over 27 equal monthly installments, beginning in October 2024, through the delivery of a minimum of 272 tonnes of copper each month. The copper to be delivered by the Company will be in the form of LME Copper Warrants. Each monthly delivery's value will be determined based on prevailing market copper prices at the time of delivery. Should the value of any delivery exceed the amount of the monthly installment payment of $2.1 million, the excess value will be repaid to the Company.

In March 2025, the Company exercised its option to increase the size of the non-priced copper prepayment facility by an additional $25.0 million. The Company is obligated to repay the $25.0 million additional facility over 21 equal monthly installments, beginning in April 2025, through the delivery of a minimum of 161 tonnes of copper each month. The copper to be delivered by the Company will be in the form of LME Copper Warrants. Each monthly delivery's value will be determined based on prevailing market copper prices at the time of delivery. Should the value of any delivery exceed the amount of the monthly installment payment of $1.3 million, the excess value will be repaid to the Company.

As the contractual obligation of the facility will be settled in the form of financial assets, the facility is accounted for as a financial liability measured at amortized cost using the effective interest rate method. Transaction costs are included in the initial measurement of the liability and amortized over the term of the facility.

The facility is secured by the shares of MCSA, NX Gold and Ero Gold.

11. Deferred Revenue

The Company entered into a precious metals purchase agreement (the “Original Xavantina Stream”) with RGLD Gold AG ("Royal Gold"), a wholly-owned subsidiary of Royal Gold, Inc., in relation to gold production from the Xavantina Operations. The Company received upfront cash consideration of $150.0 million for the purchase of 25% of an equivalent amount of gold to be produced from the Xavantina mine until 160,000 ounces of gold have been delivered and thereafter decreasing to 10% of gold produced over the remaining life of the mine. The contract will be settled by the Company delivering gold to Royal Gold. Royal Gold will make ongoing payments equal to 40% of the prevailing spot gold price for each ounce of gold delivered thereafter. Additional advances may be made by Royal Gold based on the Company achieving certain milestones as set out in the Original Xavantina Stream.

Notes to Financial Statements | Page 14


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

The movements in Xavantina Gold Stream deferred revenue during the three months ended March 31, 2026 and the year ended December 31, 2025 are comprised of the following:


	March 31, 2026		December 31, 2025
Gold ounces delivered in the period(1)	3,937		9,692


Balance, beginning of period	$	105,750	$	62,989
Advances	—		50,000
Accretion expense	1,942		6,764
Amortization of deferred revenue	(5,329)		(14,003)

Balance, end of period	$	102,363	$	105,750

Current portion	$	10,917	$	12,800
Non-current portion	91,446		92,950

(1) During the three months ended March 31, 2026, the Company delivered 3,937 payable ounces of gold (year ended December 31, 2025 - 9,692 ounces) to Royal Gold for average consideration of $1,873 per ounce (December 31, 2025 - $1,213 per ounce). At March 31, 2026, a cumulative 58,806 ounces (December 31, 2025 - 54,869 ounces) of gold have been delivered under the Xavantina Gold Stream.

As part of the Xavantina Gold Stream, the Company pledged its equity interest in Ero Gold and NX Gold to Royal Gold as collateral and provided unsecured limited recourse guarantees from Ero and NX Gold.

12. Other Non-current Liabilities


	March 31, 2026		December 31, 2025
Cash-settled equity awards (Note 13(b))	$	6,668	$	5,470
Withholding, value added tax, and other taxes payable	24,044		22,286
Provision	2,064		1,856

Dividends payable to non-controlling interest	5,800		5,503
Other liabilities	4,271		4,173
	$	42,847	$	39,288

Notes to Financial Statements | Page 15


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

13. Share Capital

As at March 31, 2026, the Company’s authorized share capital consists of an unlimited number of common

shares without par value.

(a) Options

A continuity of the issued and outstanding options is as follows:


	Three Months Ended March 31,
	2026			2025
	Number of Stock Options	Weighted Average Exercise Price (CAD)		Number of Stock Options	Weighted Average Exercise Price (CAD)
Outstanding stock options, beginning of period	1,340,563	$	22.41	1,734,607	$	19.07

Exercised	(84,178)	18.61		(16,296)	18.12
Forfeited	(2,776)	19.53		(59,256)	20.38
Outstanding stock options, end of period	1,253,609	$	22.67	1,659,055	$	19.03

The weighted average share price on the date of exercise for options exercised during the three months ended March 31, 2026 was CAD$43.16 (three months ended March 31, 2025 - CAD$19.64).

As at March 31, 2026, the following stock options were outstanding:


Weighted Average Exercise Prices	Number of Stock Options	Vested and Exercisable Number of Stock Options	Weighted Average Remaining Life in Years

$10.01 to $20.00 CAD	579,507	436,313	2.20
$20.01 to $30.00 CAD	396,358	123,109	3.67
$30.01 to $34.58 CAD	277,744	19,464	4.70
$22.67 CAD ($16.26 USD)	1,253,609	578,886	3.22

(b) Performance Share Unit Plan

The Company has a performance share unit ("PSU") plan pursuant to which the Compensation Committee may grant PSUs to employees and consultants, including directors and officers ("Eligible Persons") of the Company or its subsidiaries. Each PSU entitles the holder thereof to receive one common share, its equivalent cash value, or a combination of both, on the redemption date at the discretion of the Compensation Committee.

Notes to Financial Statements | Page 16


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

The continuity of PSUs issued and outstanding is as follows:


	Three Months Ended March 31,
	2026	2025
Outstanding balance, beginning of period	879,703	1,014,505


Forfeited	(4,535)	(38,218)
Outstanding balance, end of period	875,168	976,287

These PSUs will vest three years from the date of grant and the number of PSUs that will vest may range from 0% to 200% of the number granted, subject to the satisfaction of certain market and non-market performance conditions. Each vested PSU entitles the holder thereof to receive on or about the applicable date of vesting of such share unit (i) one common share; (ii) a cash amount equal to the fair market value of one common share as at the applicable date of vesting; or (iii) a combination of (i) and (ii), as determined by the Compensation Committee in its sole discretion. The Company has elected to settle its PSUs using a combination of cash and common shares in the past. As such, based on its history of past settlements, PSUs are classified as liabilities.

For PSUs with non-market performance conditions, the fair value of the share units granted was initially recognized at the fair value using the share price at the date of grant, and subsequently remeasured at fair value on each balance sheet date. For PSUs with market performance conditions, the fair value was determined using a Geometric Brownian Motion model. As at March 31, 2026, the fair value of the PSU liability was $17.2 million (December 31, 2025 - $16.0 million) of which $10.6 million (December 31, 2025 - $10.5 million) was recognized in accounts payable and accrued liabilities and the remainder in other non-current liabilities.

The Deferred Share Unit ("DSU") plan was established by the Board as a component of compensation for the Company's independent directors. Pursuant to the DSU Plan, DSUs may only be settled by way of cash payment. A participant is not entitled to payment in respect of the DSUs until his or her death, retirement or removal from the Board. The settlement amount of each DSU is based on the fair market value of a common share on the DSU redemption date multiplied by the number of DSUs being redeemed.

The continuity of DSUs issued and outstanding is as follows:


	Three months ended March 31,
	2026	2025
Outstanding balance, beginning of period	356,799	325,111
Issued	2,778	6,101


Outstanding balance, end of period	359,577	331,212

At March 31, 2026, DSU liabilities had a fair value of $9.6 million (December 31, 2025 - $10.1 million) which has been recognized in accounts payable and accrued liabilities.

Notes to Financial Statements | Page 17


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

(d) Restricted Share Unit Plan

The Company has a restricted share unit ("RSU") plan pursuant to which the Compensation Committee may grant share units to Eligible Persons of the Company or its subsidiaries. The fair value of these restricted share units is determined on the date of grant using the market price of the Company’s shares. Each RSU entitles the holder thereof to receive one common share, its equivalent cash value, or a combination of both, on the redemption date at the discretion of the Compensation Committee. The RSUs are equity classified based on the history of past settlements.

The continuity of RSUs issued and outstanding is as follows:


	Three months ended March 31,
	2026	2025
Outstanding balance, beginning of period	270,886	328,180

Settled	(2,147)	(1,204)
Forfeited	(1,041)	(12,259)
Outstanding balance, end of period	267,698	314,717

(e) Share-based compensation


	Three months ended March 31,
		2026		2025
Stock options		$	589	$	491
Performance share unit plan		1,809		532
Deferred share unit plan		(377)		(368)
Restricted share unit plan		619		518
Share-based compensation(1)		$	2,640	$	1,173

(1) For the three months ended March 31, 2026, the Company recorded $1.2 million (three months ended March 31, 2025 - $1.0 million) of share-based compensation in contributed surplus, and the remaining share-based compensation was recorded in liabilities.

Notes to Financial Statements | Page 18


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

(f) Net Income per Share


	Three months ended March 31,
		2026		2025
Weighted average number of common shares outstanding		104,262,136		103,564,654
Dilutive effects of:
Stock options		494,035		25,366
Share units		267,698		314,717
Weighted average number of diluted common shares outstanding(1)		105,023,869		103,904,737

Net income attributable to owners of the Company		$	108,771	$	80,227
Basic net income per share		$	1.04	$	0.77
Diluted net income per share		$	1.04	$	0.77

(1) Weighted average number of diluted common shares outstanding for the three months ended March 31, 2026 excluded 258,280 (three months ended March 31, 2025 - 949,663) stock options.

Notes to Financial Statements | Page 19


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

14. Revenue


	Three months ended March 31,
		2026		2025
Copper
Concentrate sales		$	221,364	$	108,639

Adjustments on provisional sales(1)		(660)		863
		220,704		109,502
Gold
Dore Sales		22,374		13,340
Concentrate sales		14,738		—
Adjustments on provisional sales(1)		25		—
Amortization of deferred revenue(2)		5,329		2,246
		$	42,466	$	15,586
		$	263,170	$	125,088

(1) Adjustments on provisional sales include pricing adjustments on the Company's concentrate sales, which are provisionally priced to the Company's international customers and are settled with a final sales price between zero to four months (March 31, 2025 - zero to six month) after shipment takes place and, therefore, are exposed to commodity price changes.

(2) During the three months ended March 31, 2026, the Company delivered 3,937 ounces of gold (three months ended March 31, 2025 - 1,367 ounces of gold) under a precious metals purchase agreement with Royal Gold (note 11) for average cash consideration of $1,873 per ounce (three months ended March 31, 2025 - $570 per ounces) and recognized $5.3 million in amortization of deferred revenue (three months ended March 31, 2025 - $2.2 million).

Notes to Financial Statements | Page 20


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

15. Cost of Sales


	Three months ended March 31,
		2026		2025
Materials		$	19,955	$	11,690
Salaries and benefits		27,476		18,903
Contracted services		28,806		8,216
Maintenance costs		17,044		9,523
Utilities		6,158		4,146
Other costs		1,036		404
Change in inventory (excluding depreciation and depletion)		5,492		(5,416)
Cost of production		105,967		47,466
Sales expense		13,322		3,854

Depreciation and depletion		35,752		20,374
Change in inventory (depreciation and depletion)		2,215		(2,128)
		$	157,256	$	69,566

16. General and Administrative Expenses


	Three months ended March 31,
		2026		2025
Accounting and legal		$	494	$	378
Amortization and depreciation		352		374
Office and administration		2,240		2,272
Salaries and consulting fees		5,975		6,537
Incentive payments		1,341		1,098
Other		656		712
		$	11,058	$	11,371

Notes to Financial Statements | Page 21


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

17. Finance Expense


	Three months ended March 31,
		2026		2025
Interest on loans and borrowings(2)		$	5,375	$	—
Accretion of deferred revenue		$	1,942	$	579
Accretion of provision for rehabilitation and closure costs		782		841
Interest on lease liabilities		672		563
Other finance expenses(1)		2,293		2,740
		$	11,064	$	4,723

(1) Other finance expenses during the three months ended March 31, 2026 included nil (three months ended 2025 - $1.3 million) credit loss on certain notes receivable (see Note 19).

(2) During the three months ended March 31, 2026, the Company capitalized $4.9 million (three months ended 2025 - $11.0 million) of borrowing costs to projects in progress.

18. Foreign Exchange Gain

The following foreign exchange gains (losses) arise as a result of balances and transactions in the Company’s Brazilian subsidiaries that are denominated in currencies other than the Brazilian Reals (BRL$), which is their functional currency.


	Three months ended March 31,
		2026		2025
Foreign exchange gain (loss) on USD denominated debt in Brazil		$	34,648	$	45,103
Realized foreign exchange gain (loss) on derivative contracts (note 19)		7,260		(2,216)
Unrealized foreign exchange gain (loss) on derivative contracts (note 19)		16,530		16,806
Foreign exchange (loss) gain on other financial assets and liabilities		(4,783)		(1,293)
		$	53,655	$	58,400

19. Financial Instruments

Fair value

Fair values of financial assets and liabilities are determined based on available market information and valuation methodologies appropriate to each situation.

As at March 31, 2026, derivatives were measured at fair value based on Level 2 inputs.

The carrying values of cash and cash equivalents, accounts receivable, deposits, and accounts payable and accrued liabilities approximate their fair values due to their short terms to maturity or the discount rate used approximates to the contractual interest rate. At March 31, 2026, the carrying value of loans and borrowings, including accrued interest, was $581.9 million while the fair value is approximately $578.3 million. At March 31,

Notes to Financial Statements | Page 22


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

2026, the carrying value of notes receivable, including accrued interest, was $14.6 million which approximates its fair value.

Market risk

Market risk is the risk of loss that may arise from changes in market factors such as interest rates, foreign exchange rates, and commodity prices. The purpose of market risk management is to manage and control exposures to market risks, within acceptable parameters, while optimizing return.

The Company may use derivatives, including options, forwards and swap contracts, to manage market risks.

The Company's outstanding derivative instruments as of March 31, 2026 are as follows:

Contract Description

Notional Amount

Denomination

Weighted average floor

Weighted average cap / forward price

Maturities

Foreign exchange collar (i)

$403.5 million

USD/BRL

5.54

6.34

April 2026 - December 2026

Gold collar (iii)

15,000 ounces

$ / oz

3,800

4,350

April 2026 - June 2026

(i) Foreign exchange currency risk

The Company’s subsidiaries in Brazil are exposed to exchange risks primarily related to the US dollar. In order to minimize currency mismatches, the Company monitors its cash flow projections considering future sales expectations indexed to US dollar variation in relation to the cash requirement to settle the existing financings.

The Company may use certain foreign exchange derivatives, including collars and forward contracts, to manage its foreign exchange risks. At March 31, 2026, the aggregate fair value of the Company's foreign exchange derivatives was a net asset of $23.6 million (December 31, 2025 - net asset of $4.4 million). The fair values of foreign exchange contracts were determined based on option pricing models, forward foreign exchange rates, and information provided by the counter party.

The change in fair value of foreign exchange derivatives was an unrealized gain of $16.5 million for the three months ended March 31, 2026 (an unrealized gain of $16.8 million for the three months ended March 31, 2025) and has been recognized in foreign exchange (loss) gain. In addition, during the three months ended March 31, 2026, the Company recognized a realized gain of $7.3 million (realized loss of $2.2 million for the three months ended March 31, 2025) related to the settlement of foreign currency forward collar contracts.

Notes to Financial Statements | Page 23


Ero Copper Corp.
Notes to Condensed Consolidated Interim Financial Statements
(Unaudited, Tabular amounts in thousands of US Dollars, except share and per share amounts)

(ii) Price risk

The Company may use derivatives, including forward contracts, collars and swap contracts, to manage commodity price risks.

At March 31, 2026, the Company had provisionally priced sales that are exposed to commodity price changes (note 14). Based on the Company’s net exposure at March 31, 2026, a 10% change in the price of copper and gold would have changed pre-tax net income (loss) by $8.6 million.

20. Supplemental Cash Flow Information


	Three months ended March 31,
Net change in non-cash working capital items:		2026		2025
Accounts receivable		$	(6,684)	$	(45,062)
Inventories		2,888		(8,008)
Other assets		(4,211)		(1,674)
Accounts payable and accrued liabilities		(16,124)		11,978


		$	(24,131)	$	(42,766)

Non-cash investing and financing activities:

Additions to property, plant and equipment by leases		$	1,599	$	7,175
Non-cash increase (decrease) in accounts payable in relation to additions of property, plant and equipment and exploration and evaluation assets		3,480		(1,938)



Non-cash operating activities:
Settlement of income taxes payable via VAT recoverable		$	(4,076)	$	(2,048)

Notes to Financial Statements | Page 24


			TSX: ERO
			NYSE: ERO

May 4, 2026

Ero Copper Reports First Quarter 2026 Operating and Financial Results

(all amounts in US dollars, unless otherwise noted)

Vancouver, British Columbia – Ero Copper Corp. (TSX: ERO, NYSE: ERO) (“Ero” or the “Company”) is pleased to announce its operating and financial results for the three months ended March 31, 2026. Management will host a conference call tomorrow, Tuesday, May 5, 2026, at 11:30 a.m. Eastern time to discuss the results. Dial-in details for the call can be found near the end of this press release.

HIGHLIGHTS

•Consolidated Q1 copper production totaled 17,287 tonnes in concentrate at C1 cash costs(1) of $2.39 per pound produced.

•Quarterly gold production was 5,495 ounces at C1 cash costs(1) and All-in Sustaining Costs ("AISC")(1) of $2,120 and $4,441 per ounce, respectively. Gold sales in the period totaled 10,330 ounces, including 4,311 ounces sold in gold concentrate.

•Quarterly financial results reflect solid operating performance across the Company's copper operations and necessary ventilation circuit and cooling upgrades that were undertaken at the Xavantina Operation during the period.

◦Net income attributable to the owners of the Company for the quarter was $108.8 million ($1.04 per share on a diluted basis).

◦Adjusted net income attributable to the owners of the Company(1) for the quarter was $72.4 million ($0.69 per share on a diluted basis).

◦Cash flow from operations for the first quarter was $92.8 million.

◦Adjusted EBITDA(1) was $125.2 million.

•Net debt(1) at quarter-end was $490.7 million, a reduction of approximately $11.0 million from year-end 2025 and approximately $71.1 million from March 31, 2025. This contributed to a further reduction in the Company's net leverage ratio to approximately 1.0x(2) at quarter-end, demonstrating continued progress against deleveraging priorities.

(1) These are non-IFRS measures and do not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its Management’s Discussion and Analysis for the three months ended March 31, 2026 and the Reconciliation of Non-IFRS Measures section at the end of this press release.

(2) The Company's net debt leverage ratio as of March 31, 2026 of 1.0x was calculated as net debt of $490.7 million divided by trailing 12-month adjusted EBITDA of $471.7 million.



1			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

•The Company is reaffirming its 2026 production, operating cost, and capital expenditure guidance.

◦At the Caraíba Operations, full-year production is expected to be H2 weighted on higher processed grades from planned mine sequencing and higher plant throughput relative to H1 2026 with unit operating costs expected to decline with higher production levels.

◦At the Tucumã Operation, higher mill throughput is expected through the balance of the year relative to Q1 2026, partially offset a planned moderation in mined and processed copper grades with unit costs expected to remain within the full-year guidance range.

◦At the Xavantina Operations, completion of necessary upgrades to the mine's ventilation and cooling infrastructure is expected to support increased mining rates at improved grades through the remainder of the year. Full-year production is expected to be H2 weighted, and consequently unit costs are expected to decline in conjunction with higher production levels. Gold concentrate sales are expected to benefit meaningfully from dryer conditions as the rainy season ends, with average quarterly rainfall at Xavantina typically declining from approximately 650 to 700 millimeters in Q1 to approximately 60 millimeters in Q2 and Q3, significantly reducing drying times and supporting higher concentrate sales volumes through the remainder of the year.

◦Full-year capital expenditure guidance is maintained at $275 to $320 million.

•At the Furnas Copper-Gold Project ("Furnas" or the "Project"), the Company completed over 12,000 meters of drilling during the quarter as part of the planned 50,000-meter 2026 drill program. Site activities during the quarter also included the continued advancement of engineering, environmental, and permitting workstreams. The Company expects to issue a project update on Furnas in mid-2026 covering, among others, exploration drill results since the completion of an inaugural Preliminary Economic Analysis ("PEA") on the Project.

"Our copper operations delivered a solid start to the year, and our Xavantina Operation undertook necessary ventilation and cooling circuit upgrades and subsequent tie-in that, together with the mechanization work completed in 2025, we expect will allow Xavantina to continue to deliver well into the future, particularly since the deposit remains completely open at depth,” said Makko DeFilippo, President and Chief Executive Officer. “Since this time last year, we have made considerable progress on our transformation objectives across the business, and I am pleased with our Q1 performance. While we are not immune from industry-wide cost pressures, our operations are performing well, metal prices remain constructive and our balance sheet continues to strengthen with net debt down meaningfully year-over-year. During Q1, we published the PEA on Furnas, outlining the Company's next significant phase of growth. As we continue to drive Furnas forward, we are translating years of investment into cash flow generation resulting in meaningful deleveraging - our highest capital-allocation priority."



2			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

FIRST QUARTER REVIEW

The Caraíba Operations

•The Caraíba Operations produced 8,826 tonnes of copper in concentrate during the quarter at a C1 cash cost(1) of $2.79 per pound produced.

•Quarterly production reflected lower processed grades due to stope sequencing at the Pilar Mine and reduced contribution from the Surubim open pit, where mined volumes during the quarter were affected by seasonal rainfall during January and February.

The Tucumã Operation

•The Tucumã Operation produced 8,461 tonnes of copper in concentrate during the period at a C1 cash cost(1) of $1.97 per pound produced.

•Production during the period reflected a planned moderation in processed copper grades, partially offset by higher plant throughput following the completion in Q4 2025 of planned mill liner replacement maintenance originally scheduled for Q1 2026.

•The Company is advancing an expansion of tailings filtration capacity at the Tucumã Operation. The associated capacity and plant throughput benefits, which remain on-track for Q4 2026, have not been incorporated into full-year 2026 guidance.

The Xavantina Operations

•The Xavantina Operations produced 5,495 ounces of gold at a C1 cash cost(1) of $2,120 per ounce and AISC(1) of $4,441 per ounce. Unit costs during the quarter reflected the lower production levels associated with the scheduled ventilation and cooling infrastructure work.

•Gold production during the period reflected necessary ventilation and cooling infrastructure upgrades and tie-in to the existing infrastructure. This investment, substantially complete at the end of April, will enable higher development and mining rates going forward as the mine continues to advance to depth, where the deposit remains open.

•Quarterly gold sales totaled 10,330 ounces, including 4,311 ounces sold in gold concentrate. Concentrate drying times during the quarter were extended by heavy seasonal rainfall. With dryer conditions following the end of the rainy season, gold concentrate sales volumes are expected to be higher over the remainder of the year.



3			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

OPERATING HIGHLIGHTS


	2026 - Q1		2025 - Q4		2025 - Q1
Copper (Caraíba Operations)
Ore Mined (tonnes)	985,577		1,225,017		696,239
Ore Processed (tonnes)	1,072,209		1,174,732		692,901
Grade (% Cu)	0.93		1.00		1.18
Recovery (%)	88.3		88.7		90.2
Cu Production (tonnes)	8,826		10,431		7,357
Cu Production (000 lbs)	19,459		22,995		16,219
Cu Sold in Concentrate (tonnes)	9,205		10,404		6,949
Cu Sold in Concentrate (000 lbs)	20,294		22,938		15,318
Cu C1 cash cost(1)	$	2.79	$	2.27	$	2.22

Copper (Tucumã Operation)
Ore Mined (tonnes)	456,684		1,199,067		328,291
Ore Processed (tonnes)	563,717		517,246		294,314
Grade (% Cu)	1.66		1.93		2.18
Recovery (%)	88.3		90.5		89.40
Cu Production (tonnes)	8,461		9,275		5,067
Cu Production (000 lbs)	18,652		20,449		11,171
Cu Sold in Concentrate (tonnes)	8,751		9,729		5,168
Cu Sold in Concentrate (000 lbs)	19,292		21,450		11,393
Cu C1 cash cost(1)(2)	$	1.97	$	1.75	$	—

Gold (Xavantina Operations)
Ore Mined (tonnes)	32,820		55,655		33,228
Ore Processed (tonnes)	37,128		53,256		33,228
Grade (g / tonne)	5.66		9.98		6.87
Recovery (%)	81.3		79.6		90.8
Au Production (oz)	5,495		13,837		6,638
Au Sold in doré (oz)	6,019		13,401		5,834
Gold Sold in Concentrate (oz)(3)	4,311		12,754		—
Gold Sold (oz)	10,330		26,155		5,834
Au C1 cash cost(1)	2,120		766		1,100
Au AISC(1)	4,441		1,702		2,228

(1) Please refer to the Company’s discussion of Non-IFRS measures in its Management’s Discussion and Analysis for the three months ended March 31, 2026 and the Reconciliation of Non-IFRS Measures section at the end of this press release.

(2) The Company declared commercial production at the Tucumã Operation effective July 1, 2025. As such, YTD 2025 copper C1 cash cost for the Tucumã Operation reflects costs from Q3 2025 onward only.

(3) Gold sold in concentrate includes gold ounces produced from the CIL circuit and the pond.



4			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

FINANCIAL HIGHLIGHTS

($ in millions, except per share amounts)


	2026 - Q1		2025 - Q4		2025 - Q1
Revenues	$	263.2	$	320.2	$	125.1
Gross profit	105.9		164.4		55.5
EBITDA(1)	175.5		151.8		117.9
Adjusted EBITDA(1)	125.2		186.7		63.2
Cash flow from operations	92.8		129.1		65.4
Net income	109.3		78.7		80.6
Net income attributable to owners of the Company	108.8		77.0		80.2
Per share (basic)	1.04		0.74		0.77
Per share (diluted)	1.04		0.74		0.77
Adjusted net income attributable to owners of the Company(1)	72.4		108.4		35.8
Per share (basic)	0.69		1.04		0.35
Per share (diluted)	0.69		1.04		0.35

Cash, cash equivalents, and short-term investments	91.2		105.4		80.6
Working capital(1)	66.2		15.5		10.2
Net debt(1)	490.7		501.7		561.8



5			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

2026 PRODUCTION AND COST GUIDANCE

Consolidated copper production guidance is maintained at 67,500 to 77,500 tonnes. Full-year copper production is expected to be second-half weighted at both the Caraíba and Tucumã Operations. Production at Caraíba in Q2 is expected to be broadly similar to Q1 before increasing in H2 2026, driven by higher processed grades from planned mine sequencing along with higher throughput levels. Production at Tucumã is expected to be modestly higher in H2 2026 on higher plant throughput, partially offset by lower planned copper grades.

Consolidated copper C1 cash cost(1) guidance is maintained at $2.15 to $2.35 per pound produced, with costs expected to be above the guidance range in H1 2026 and to decrease sequentially through H2 2026 as processed grades at the Caraíba Operations increase.

At the Xavantina Operations, gold production from mining and processing operations is expected to total 40,000 to 50,000 ounces in 2026, with mining rates, mill throughput and processed grades projected to improve as the ventilation and cooling infrastructure becomes fully operational (substantially complete at the end of April). As a result, production at Xavantina is expected to be weighted towards H2 2026.

Gold C1 cash cost(1) and AISC(1) guidance is maintained at $1,000 to $1,250 and $2,000 to $2,500 per ounce, respectively. Unit costs are expected to be highest in Q1 and to decline over the remaining quarters of the year as Xavantina's production volumes increase.



Consolidated Copper Production (tonnes)
Caraíba Operations																								35,000 - 40,000
Tucumã Operation																								32,500 - 37,500
Total Copper																								67,500 - 77,500

Consolidated Copper C1 Cash Cost(1)
Caraíba Operations																								$2.30 - $2.50
Tucumã Operation																								$1.95 - $2.15
Consolidated Copper Operations																								$2.15 - $2.35

The Xavantina Operations
Au Production (ounces)																								40,000 - 50,000
Gold C1 Cash Cost(1) ($/oz)																								$1,000 - $1,250
Gold AISC(1) ($/oz)																								$2,000 - $2,500

(1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within this Press Release.



6			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

2026 CAPITAL EXPENDITURE GUIDANCE

Total capital expenditures guidance remains unchanged at a range of $275 to $320 million.

Figures presented in the table below are in USD millions.



Caraíba Operations						$170 - $185
Tucumã Operation						$35 - $45
Xavantina Operations						$40 - $50
Furnas Copper-Gold Project, Other Exploration & Corporate						$30 - $40
Total						$275 - $320

Note: Guidance is based on certain estimates and assumptions, including but not limited to, mineral reserve estimates, grade and continuity of interpreted geological formations and metallurgical performance. Please refer to the Company’s most recent AIF and Management of Risks and Uncertainties in the MD&A for complete risk factors.



7			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

CONFERENCE CALL DETAILS

The Company will hold a conference call on Tuesday, May 5, 2026 at 11:30 am Eastern time (8:30 am Pacific time) to discuss these results. A results presentation will be available for download via the webcast link and in the Presentations section of the Company's website on the day of the conference call.


Date:			Tuesday, May 5, 2026
Time:			11:30 am Eastern time (8:30 am Pacific time)
Dial in:			Canada/USA Toll Free: 1-833-752-3380 International: +1-647-846-2821 Please dial in 5-10 minutes prior to the start of the call or pre-register using this link to bypass the live operator queue. (https://dpregister.com/sreg/10207291/1037ecd0ca7)
Webcast:			To access the webcast, click here. (https://event.choruscall.com/mediaframe/webcast.html?webcastid=A9tf7UE9)
Replay:			Canada/USA: 1-855-669-9658, International: +1-412-317-0088 For country-specific dial-in numbers, click here. (https://services.choruscall.com/ccforms/replay.html)
Replay Passcode:			2860523



8			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Reconciliation of Non-IFRS Measures

Financial results of the Company are presented in accordance with IFRS. The Company utilizes certain alternative performance (non-IFRS) measures to monitor its performance, including copper C1 cash cost, gold C1 cash cost, gold AISC, EBITDA, adjusted EBITDA, adjusted net income attributable to owners of the Company, adjusted net income per share, net (cash) debt, working capital and available liquidity. These performance measures have no standardized meaning prescribed within generally accepted accounting principles under IFRS and, therefore, amounts presented may not be comparable to similar measures presented by other mining companies. These non-IFRS measures are intended to provide supplemental information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS.

For additional details please refer to the Company’s discussion of non-IFRS and other performance measures in its Management’s Discussion and Analysis for the three months ended March 31, 2026 which is available on SEDAR+ at www.sedarplus.ca, and on EDGAR at www.sec.gov.



9			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Copper C1 cash cost

The following table provides a reconciliation of copper C1 cash cost to cost of production, its most directly comparable IFRS measure.

The Caraíba Operations


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Cost of production	$	62,352	$	55,895	$	35,719
Add (less):
Transportation costs & other	2,896		1,904		1,322
Treatment, refining, and other	2,164		3,328		2,410
By-product credits	(10,077)		(7,614)		(4,699)
Incentive payments	(1,534)		(1,516)		(1,289)
Net change in inventory	(1,483)		266		2,659
Foreign exchange translation and other	(87)		110		(147)
C1 cash costs(1)	$	54,231	$	52,373	$	35,975




Mining	$	42,411	$	38,482	$	25,796
Processing	9,102		8,867		6,352
Indirect	7,735		7,406		4,794
Production costs	59,248		54,755		36,942
By-product credits	(10,077)		(7,614)		(4,699)
Treatment, refining and other	5,060		5,232		3,732
C1 cash costs(1)	$	54,231	$	52,373	$	35,975


	2026 - Q1		2025 - Q4		2025 - Q1
Costs per pound
Total copper produced (lbs, 000)	19,459		22,995		16,219

Mining	$	2.18	$	1.67	$	1.59
Processing	$	0.47	$	0.39	$	0.39
Indirect	$	0.40	$	0.32	$	0.30
By-product credits	$	(0.52)	$	(0.33)	$	(0.29)
Treatment, refining and other	$	0.26	$	0.22	$	0.23
Copper C1 cash costs(1)	$	2.79	$	2.27	$	2.22



10			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

The Tucumã Operation


Reconciliation:	2026 - Q1		2025 - Q4
Cost of production	$	29,738	$	29,689
Add (less):
Transportation costs & other	6,391		8,376
Treatment, refining, and other	2,471		—
By-product credits	(701)		—
Incentive payments	(546)		(396)
Net change in inventory	(556)		(1,970)

Foreign exchange translation and other	(4)		—
C1 cash costs(1)	$	36,793	$	35,699




Mining	$	6,538	$	6,110
Processing	17,976		17,253
Indirect	4,118		3,945
Production costs	28,632		27,308
By-product credits	(701)		—
Treatment, refining and other	8,862		8,391
C1 cash costs(1)	$	36,793	$	35,699


	2026 - Q1		2025 - Q4
Costs per pound
Total copper produced (lbs, 000)	18,652		20,449

Mining	$	0.35	$	0.30
Processing	$	0.96	$	0.84
Indirect	$	0.22	$	0.19
By-product credits	$	(0.04)	$	—
Treatment, refining and other	$	0.48	$	0.42
Copper C1 cash costs(1)	$	1.97	$	1.75



11			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Gold C1 cash cost and gold AISC

The following table provides a reconciliation of gold C1 cash cost and gold AISC to cost of production, its most directly comparable IFRS measure.


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Cost of production	$	13,877	$	12,882	$	6,225
Add (less):
Incentive payments	(320)		(442)		(269)
Net change in inventory	(807)		(208)		1,339
By-product credits	(189)		(459)		(111)
Smelting and refining	769		320		146
Gold concentrate re-handling cost	(1,641)		(1,444)		—
Foreign exchange translation, transportation and other	(38)		(44)		(29)
C1 cash costs	$	11,651	$	10,605	$	7,301
Site general and administrative	1,409		1,628		1,077
Accretion of mine closure and rehabilitation provision	145		152		141
Sustaining capital expenditure	8,136		7,091		3,909
Sustaining lease payments	2,623		3,073		2,021
Royalties and production taxes	434		995		338
AISC	$	24,398	$	23,544	$	14,787



12			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO


	2026 - Q1		2025 - Q4		2025 - Q1
Costs
Mining	$	5,820	$	5,619	$	3,760
Processing	2,940		3,138		2,206
Indirect	2,311		1,987		1,300
Production costs	11,071		10,744		7,266
Smelting and refining costs	769		320		146
By-product credits	(189)		(459)		(111)
C1 cash costs	$	11,651	$	10,605	$	7,301
Site general and administrative	1,409		1,628		1,077
Accretion of mine closure and rehabilitation provision	145		152		141
Sustaining capital expenditure	8,136		7,091		3,909
Sustaining leases payments	2,623		3,073		2,021
Royalties and production taxes	434		995		338
AISC	$	24,398	$	23,544	$	14,787

Costs per ounce
Total gold produced (ounces)	5,495		13,837		6,638

Mining	$	1,059	$	406	$	566
Processing	$	535	$	227	$	332
Indirect	$	420	$	143	$	195
Smelting and refining	$	140	$	23	$	22
By-product credits	$	(34)	$	(33)	$	(16)
Gold C1 cash cost	$	2,120	$	766	$	1,100
Gold AISC	$	4,441	$	1,702	$	2,228



13			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Earnings before interest, taxes, depreciation and amortization (EBITDA) and Adjusted EBITDA

The following table provides a reconciliation of EBITDA and Adjusted EBITDA to net income, its most directly comparable IFRS measure.


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Net Income	$	109,311	$	78,738	$	80,627
Adjustments:
Finance expense	11,064		11,330		4,723
Finance income	(1,121)		(2,201)		(838)
Income tax expense	17,885		23,453		14,741
Amortization and depreciation	38,319		40,503		18,620
EBITDA	$	175,458	$	151,823	$	117,873
Foreign exchange (gain) loss	(53,655)		23,352		(58,400)
Share based compensation	2,640		8,909		1,173
Unrealized loss on commodity derivatives	751		1,597		2,102
Change in rehabilitation and closure provision(1)	—		556		—
Write-down of mineral properties and exploration and evaluation asset	—		—		—

Others	—		507		458
Adjusted EBITDA	$	125,194	$	186,744	$	63,206



14			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Adjusted net income attributable to owners of the Company and Adjusted net income per share attributable to owners of the Company


Reconciliation:	2026 - Q1		2025 - Q4		2025 - Q1
Net income as reported attributable to the owners of the Company	$	108,771	$	76,970	$	80,227
Adjustments:
Share based compensation	2,640		8,909		1,173
Unrealized foreign exchange (gain) loss on USD denominated balances in MCSA	(30,260)		19,289		(39,628)
Unrealized foreign exchange (gain) loss on foreign exchange derivative contracts	(16,464)		4,723		(16,739)
Unrealized loss on commodity derivatives	733		1,559		2,079

Change in rehabilitation and closure provision(1)	—		554		—
Write-down of mineral properties and exploration and evaluation asset	—		—		—
Others	—		504		458
Tax effect on the above adjustments	7,014		(4,061)		8,279
Adjusted net income attributable to owners of the Company	$	72,434	$	108,447	$	35,849

Weighted average number of common shares
Basic	104,262,136		103,961,272		103,564,654
Diluted	105,023,869		104,693,751		103,904,737

Adjusted EPS
Basic	$	0.69	$	1.04	$	0.35
Diluted	$	0.69	$	1.04	$	0.35



15			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

Net Debt (Cash)

The following table provides a calculation of net debt (cash) based on amounts presented in the Company’s condensed consolidated interim financial statements as at the periods presented.


	March 31, 2026		December 31, 2025		March 31, 2025
Current portion of loans and borrowings	$	39,202	$	55,711	$	52,479
Long-term portion of loans and borrowings	542,691		551,403		589,860
Less:
Cash and cash equivalents	(91,207)		(105,442)		(80,573)


Net debt (cash)	$	490,686	$	501,672	$	561,766

Working Capital and Available Liquidity

The following table provides a calculation for these based on amounts presented in the Company’s condensed consolidated interim financial statements as at the periods presented.


	March 31, 2026		December 31, 2025		March 31, 2025
Current assets	$	290,299	$	276,212	$	232,292
Less: Current liabilities	(224,064)		(260,718)		(222,048)
Working capital	$	66,235	$	15,494	$	10,244

Cash and cash equivalents	91,207		105,442		80,573

Available undrawn revolving credit facilities(1)	55,000		45,000		35,000
Available undrawn prepayment facilities(2)	—		—		—
Available liquidity	$	146,207	$	150,442	$	115,573

(1) In January 2025, the Company amended its Senior Credit Facility to increase the limit from $150.0 million to $200.0 million and extended the maturity from December 2026 to December 2028.



16			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

ABOUT ERO

Ero is a Brazil-focused, growth-oriented mining company with a diversified portfolio of copper and gold assets. Headquartered in Vancouver, B.C., the Company operates two copper mines – the Caraíba Operations in Bahia State and the Tucumã Operation in Pará State – as well as the Xavantina Operations, a producing gold mine in Mato Grosso State. In addition to its operating assets, Ero is advancing the Furnas Copper-Gold Project, located in the mineral-rich Carajás Province in Pará State, through a definitive earn-in agreement with Vale Base Metals to acquire a 60% interest in the project.

FOR MORE INFORMATION, PLEASE CONTACT

Farooq Hamed, VP, Investor Relations

info@ero.com



17			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada


			TSX: ERO
			NYSE: ERO

CAUTION REGARDING FORWARD LOOKING INFORMATION AND STATEMENTS

This press release contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation (collectively, “forward-looking statements”). Forward-looking statements include statements that use forward-looking terminology such as “may”, “could”, “would”, “will”, “should”, “intend”, “target”, “plan”, “expect”, “budget”, “estimate”, “forecast”, “schedule”, “anticipate”, “believe”, “continue”, “potential”, “view” or the negative or grammatical variation thereof or other variations thereof or comparable terminology. Forward-looking statements may include, but are not limited to, statements with respect to the Company’s expected production, operating costs, and capital expenditures at the Caraíba Operations, the Tucumã Operation, and the Xavantina Operations; the estimation of mineral reserves and mineral resources; estimated completion dates for certain milestones, including the completion of the Pilar Mine’s new external shaft at the Caraíba Operations; the ability of the Company to maintain improved performance at the Caraíba mill or realize the benefits associated with the Pilar Mine’s new external shaft; the expected timing of delivery, installation, and commissioning of additional tailings filtration capacity at the Tucumã Operation, including the three new tailings filters and the addition of plates to each of the three existing filter presses, and the expected impact on plant throughput; the expected completion of the ventilation and cooling infrastructure tie-in at the Xavantina Operations and the expected impact of that tie-in on mining rates, mill throughput, and processed grades; the Company’s ability to advance work programs under the Furnas earn-in agreement, estimated timing for certain project milestones, the ability to further enhance the value of the Project’s economics, extend the known limits of mineralization and/or increase its production profile, the ability to advance license and permitting processes, produce and publish additional engineering studies (including the Company’s plans to appoint an engineering firm to lead, and subsequently to complete, a pre-feasibility study at the Furnas Copper-Gold Project), the expected timing of the related Furnas update press release, the results of the Phase 2 and Phase 3 drill programs, upgrade mineral resources to mineral reserves, and to ultimately achieve expected production, operating cost, capital expenditure forecasts, and economic value at the Furnas Project; the discovery of additional mineralization and the potential for positive impacts on production rates from the mines or processing facilities; the significance of any particular exploration program or result, including the Company’s expectations associated with historic gold concentrate stockpiles at the Xavantina Operations, and the successful development of new deposits; the Company’s ability to monetize gold concentrates produced at the Xavantina Operations, including expectations for operating costs, payability, the actual grades of gold concentrates sold, statements with respect to total volume or tonnes of gold concentrate to be sold, and the timing therein; the Company’s capital allocation priorities, including continued deleveraging of the balance sheet; as well as the Company’s expectations for current and future exploration plans including, but not limited to, planned areas of additional exploration and the potential to convert any portion of the inferred mineral resource base to economically viable mineral reserves; and any other statement that may predict, forecast, indicate or imply future plans, intentions, levels of activity, results, performance or achievements.

Forward-looking statements are subject to a variety of known and unknown risks, uncertainties and other factors that could cause actual results, actions, events, conditions, performance or achievements to materially differ from those expressed or implied by the forward-looking statements, including, without limitation, risks discussed in this press release and in the Company’s most recent Annual Information Form (“AIF”) under the heading “Risk Factors”. The risks discussed in this press release and in the AIF are not exhaustive of the factors that may affect any of the Company’s forward-looking statements. Although the Company has attempted to identify important factors that could cause actual results, actions, events, conditions, performance or achievements to differ materially from those contained in forward-looking statements, there may be other factors that cause results, actions, events, conditions, performance or achievements to differ from those anticipated, estimated or intended.

The Company’s forward-looking statements are based on the assumptions, beliefs, expectations and opinions of management on the date the statements are made, many of which may be difficult to predict and beyond the Company’s control. In connection with the forward-looking statements contained in this press release and in the AIF, the Company has made certain assumptions about, among other things: favourable equity and debt capital markets; the ability to raise any necessary additional capital on reasonable terms to advance the production, development and exploration of the Company’s properties and assets; future prices of copper, gold and other metal prices; the timing and results of exploration and drilling programs; the accuracy of any mineral reserve and mineral resource estimates; the geology of the Caraíba Operations, the Xavantina Operations, the Tucumã Operation and the Furnas Copper-Gold Project being as described in the respective technical report for each property; production costs; the accuracy of budgeted exploration, development and construction costs and expenditures; the price of other commodities such as fuel; future currency exchange rates, interest rates and tariff rates; operating conditions being favourable such that the Company is able to operate in a safe, efficient and effective manner; work force continuing to remain healthy in the face of prevailing epidemics, pandemics or other health risks, political and regulatory stability; the receipt of governmental, regulatory and third party approvals, licenses and permits on favourable terms; obtaining required renewals for existing approvals, licenses and permits on favourable terms; requirements under applicable laws; sustained labour stability; stability in financial and capital goods markets; availability of equipment; positive relations with local groups and the Company’s ability to meet its obligations under its agreements with such groups; and satisfying the terms and conditions of the Company’s current loan arrangements. Although the Company believes that the assumptions inherent in forward-looking statements are reasonable as of the date of this press release, these assumptions are subject to significant business, social, economic, political, regulatory, competitive and other risks and uncertainties, contingencies and other factors that could cause actual actions, events, conditions, results, performance or achievements to be materially different from those projected in the forward-looking statements. The Company cautions that the foregoing list of assumptions is not exhaustive. Other events or circumstances could cause actual results to differ materially from those estimated or projected and expressed in, or implied by, the forward-looking statements contained in this press release. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

Forward-looking statements contained herein are made as of the date of this press release and the Company disclaims any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or results or otherwise, except as and to the extent required by applicable securities laws.

CAUTIONARY NOTES REGARDING MINERAL RESOURCE AND MINERAL RESERVE ESTIMATES

Unless otherwise indicated, all reserve and resource estimates included in this press release and the documents incorporated by reference herein have been prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI 43-101") and the Canadian Institute of Mining, Metallurgy and Petroleum (the “CIM”) — CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the CIM Council, as amended (the “CIM Standards”). NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. Canadian standards, including NI 43-101, differ significantly from the requirements of the United States Securities and Exchange Commission (the “SEC”), and reserve and resource information included herein may not be comparable to similar information disclosed by U.S. companies. In particular, and without limiting the generality of the foregoing, this presentation and the documents incorporated by reference herein use the terms “measured resources,” “indicated resources” and “inferred resources” as defined in accordance with NI 43-101 and the CIM Standards.

Further to recent amendments, mineral property disclosure requirements in the United States (the “U.S. Rules”) are governed by subpart 1300 of Regulation S-K of the U.S. Securities Act of 1933, as amended (the “U.S. Securities Act”) which differ from the CIM Standards. As a foreign private issuer that is eligible to file reports with the SEC pursuant to the multi-jurisdictional disclosure system (the “MJDS”), Ero is not required to provide disclosure on its mineral properties under the U.S. Rules and will continue to provide disclosure under NI 43-101 and the CIM Standards. If Ero ceases to be a foreign private issuer or loses its eligibility to file its annual report on Form 40-F pursuant to the MJDS, then Ero will be subject to the U.S. Rules, which differ from the requirements of NI 43-101 and the CIM Standards.

Pursuant to the new U.S. Rules, the SEC recognizes estimates of “measured mineral resources”, “indicated mineral resources” and “inferred mineral resources.” In addition, the definitions of “proven mineral reserves” and “probable mineral reserves” under the U.S. Rules are now “substantially similar” to the corresponding standards under NI 43-101. Mineralization described using these terms has a greater amount of uncertainty as to its existence and feasibility than mineralization that has been characterized as reserves. Accordingly, U.S. investors are cautioned not to assume that any measured mineral resources, indicated mineral resources, or inferred mineral resources that Ero reports are or will be economically or legally mineable. Further, “inferred mineral resources” have a greater amount of uncertainty as to their existence and as to whether they can be mined legally or economically. Under Canadian securities laws, estimates of “inferred mineral resources” may not form the basis of feasibility or pre-feasibility studies, except in rare cases. While the above terms under the U.S. Rules are “substantially similar” to the standards under NI 43-101 and CIM Standards, there are differences in the definitions under the U.S. Rules and CIM Standards. Accordingly, there is no assurance any mineral reserves or mineral resources that Ero may report as “proven mineral reserves”, “probable mineral reserves”, “measured mineral resources”, “indicated mineral resources” and “inferred mineral resources” under NI 43-101 would be the same had Ero prepared the reserve or resource estimates under the standards adopted under the U.S. Rules.



18			Ero
			625 Howe Street \| Suite 1050 \| Vancouver \| BC \| V6C 2T6 \| Canada

Source: View Original Filing on SEC EDGAR

FAQ

How did Ero Copper (ERO) perform financially in Q1 2026?

Ero Copper reported strong Q1 2026 results with revenue of $263.2 million and net income of $109.3 million. Diluted earnings were $1.04 per share, supported by solid copper operations, foreign-exchange gains and higher realized copper and gold prices across its Brazilian assets.

What were Ero Copper’s Q1 2026 production and cost metrics?

Consolidated copper production was 17,287 tonnes in Q1 2026 at C1 cash costs of $2.39 per pound. Caraíba produced 8,826 tonnes at $2.79/lb, Tucumã 8,461 tonnes at $1.97/lb, and Xavantina produced 5,495 oz of gold at C1 cash costs of $2,120/oz.

What is Ero Copper’s 2026 production guidance for copper and gold?

For 2026, Ero Copper maintains consolidated copper guidance of 67,500–77,500 tonnes, with Caraíba at 35,000–40,000 tonnes and Tucumã at 32,500–37,500 tonnes. Xavantina’s gold production is guided to 40,000–50,000 ounces, expected to be second-half weighted as mine conditions improve.

What are Ero Copper’s 2026 cost and capex guidance ranges?

The company guides consolidated copper C1 cash costs to $2.15–$2.35/lb, with Caraíba at $2.30–$2.50/lb and Tucumã at $1.95–$2.15/lb. Xavantina’s 2026 gold C1 cash costs are $1,000–$1,250/oz, AISC $2,000–$2,500/oz, and total capital expenditures are forecast at $275–$320 million.

What is Ero Copper’s liquidity and debt position after Q1 2026?

At March 31, 2026, Ero Copper held $91.2 million in cash and cash equivalents and had total available liquidity of $146.2 million, including undrawn credit. Net debt was $490.7 million, down from $561.8 million a year earlier, reflecting continued deleveraging.

What does the Furnas Copper-Gold Project PEA show for Ero Copper?

The Furnas Preliminary Economic Assessment outlines a large-scale, long-life copper-gold operation with an after-tax NPV(8%) of $2.0 billion and a 27.0% after-tax IRR, using long-term prices of $4.60/lb copper, $3,300/oz gold and $40/oz silver. The study is preliminary and includes inferred resources.

How did foreign exchange and derivatives affect Ero Copper in Q1 2026?

Foreign exchange movements were significant, with a $53.7 million foreign-exchange gain in Q1 2026. The company also recorded a $16.5 million gain on foreign-exchange derivatives and a $7.3 million realized gain on settled currency collars, partly offset by losses on gold price derivatives.

Filing Exhibits & Attachments

3 documents

[6-K] Ero Copper Corp. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Positive

Negative

Insights

FAQ

How did Ero Copper (ERO) perform financially in Q1 2026?

What were Ero Copper’s Q1 2026 production and cost metrics?

What is Ero Copper’s 2026 production guidance for copper and gold?

What are Ero Copper’s 2026 cost and capex guidance ranges?

What is Ero Copper’s liquidity and debt position after Q1 2026?

What does the Furnas Copper-Gold Project PEA show for Ero Copper?

How did foreign exchange and derivatives affect Ero Copper in Q1 2026?

Filing Exhibits & Attachments

Press Releases

[6-K] Ero Copper Corp. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Positive

Negative

Insights

Mining equity analyst neutral

FAQ

How did Ero Copper (ERO) perform financially in Q1 2026?

What were Ero Copper’s Q1 2026 production and cost metrics?

What is Ero Copper’s 2026 production guidance for copper and gold?

What are Ero Copper’s 2026 cost and capex guidance ranges?

What is Ero Copper’s liquidity and debt position after Q1 2026?

What does the Furnas Copper-Gold Project PEA show for Ero Copper?

How did foreign exchange and derivatives affect Ero Copper in Q1 2026?

Filing Exhibits & Attachments

Press Releases