Aura Signed the Agreement to Relocate Road at Borborema Mine, Unlocking an additional 670 Koz of gold in Mineral Reserves, totaling 1.5 Moz

Rhea-AI Summary

Aura Minerals (Nasdaq: AUGO) signed an agreement to relocate a federal road at Borborema, enabling conversion of Indicated resources to Probable Mineral Reserves and raising reserves by 82% to ~1.5 Moz Au.

The updated feasibility study shows a 20.5-year LOM, average annual production ~65 koz, NPV US$612.5M and after-tax IRR 42.8%.

Positive

• Mineral Reserves +82% to ~1.5 Moz Au
• NPV US$612.5M (weighted average gold price basis)
• After-tax IRR 42.8%
• Life of mine 20.5 years with ~65 koz average annual production

Negative

• Stripping ratio 5.13:1 waste to ore
• Average mining cost US$2.78/t mined (LOM)
• Pit expansion limited north by a high-voltage transmission line

Key Figures

Reserve increase: 82% Probable reserves: 40.7 Mt @ 1.13 g/t Au (1,479 koz) Total reserves: 1.5 Moz gold +5 more

8 metrics

Reserve increase 82% Increase in Mineral Reserve base vs previous feasibility study

Probable reserves 40.7 Mt @ 1.13 g/t Au (1,479 koz) Probable Mineral Reserves in Borborema Feasibility Study

Total reserves 1.5 Moz gold Total Mineral Reserves at Borborema after update

Project NPV US$612.5 million Updated Borborema NPV vs US$182 million in previous FS

After-tax IRR 42.8% After-tax IRR for Borborema using US$2,274/oz gold price

Mine life 20.5 years Life of Mine based on Mineral Reserves under S-K 1300

Annual production 65 koz gold Weighted average annual gold production estimate over LOM

Stripping ratio 5.13:1 Waste to ore stripping ratio at 0.9 revenue factor

Market Reality Check

Price: $89.63 Vol: Volume 0.85M is 25% below...

normal vol

$89.63 Last Close

Volume Volume 0.85M is 25% below 20-day average 1.14M (relative volume 0.75x). normal

Technical Price 89.63 is above 200-day MA 42.19 and 0.62% below 52-week high 90.19, up 302.96% from 52-week low.

Peers on Argus

AUGO gained 5.99% while key gold peers FSM (+4.69%), NG (+7.01%), SSRM (+6.35%) ...

AUGO gained 5.99% while key gold peers FSM (+4.69%), NG (+7.01%), SSRM (+6.35%) and NGD (+8.96%) also advanced; SAND lagged at -5.16%, suggesting mainly sector-supportive backdrop with one notable underperformer.

Historical Context

5 past events · Latest: Jan 12 (Positive)

Pattern 5 events

Date	Event	Sentiment	Move	Catalyst
Jan 12	Record production	Positive	+7.7%	Record Q4 2025 and full-year GEO production with Borborema ramp-up.
Jan 6	License & early works	Positive	+1.5%	Construction license and start of early works at Era Dorada project.
Dec 8	Growth outlook update	Positive	-2.0%	Raised multi-year GEO outlook above prior 450,000 GEO projection.
Dec 8	Era Dorada FS	Positive	-2.0%	Feasibility Study with 16.8-year LOM and 1.75M GEO reserves.
Dec 1	MSG acquisition close	Positive	-1.0%	Closing MSG mine acquisition with US$72.8M payment and NSR.

Pattern Detected

Recent news has been largely positive operationally, with a mix of reactions: some production and licensing updates saw gains, while several growth and feasibility announcements were followed by modest declines.

Recent Company History

Over the past six months, Aura reported record Q4 2025 production and solid full-year results, progress at Borborema, and growth via the MSG acquisition. It also advanced the Era Dorada project with a detailed Feasibility Study and updated multi-year growth outlook. Some expansion-focused announcements on Dec 8 saw negative price reactions, while operational and licensing updates in Jan 2026 were met with gains. Today’s Borborema reserve and economics upgrade fits this ongoing growth narrative.

Market Pulse Summary

This announcement details a major upgrade at Borborema, lifting reserves to 1.5 Moz with Probable Re...

Analysis

This announcement details a major upgrade at Borborema, lifting reserves to 1.5 Moz with Probable Reserves of 40.7 Mt at 1.13 g/t and an after-tax NPV of US$612.5M. It follows recent record production and expansion steps across Aura’s portfolio. Investors may focus on execution of the 20.5-year mine plan, adherence to cost and recovery assumptions, and how Borborema complements Era Dorada and MSG in the broader growth strategy.

Key Terms

probable mineral reserves, net present value, irr, ordinary kriging, +4 more

8 terms

probable mineral reserves technical

"conversion of a significant portion of the existing Indicated Mineral Resources into Probable Mineral Reserves."

Probable mineral reserves are estimates of the amount of a mineral that can reasonably be expected to be economically extracted based on geological data and preliminary mine plans, but with less certainty than the highest-probability category. For investors they signal the likely recoverable material that can generate revenue, shaping production forecasts, capital needs and risk assessments—akin to items on a menu that are expected to be available but not guaranteed.

net present value financial

"Robust Project Economics: Net present value (“NPV”) of US$612.5 million"

Net present value is a way to measure the value of a future amount of money today. It considers how money available in the future is worth less than money now because of potential earning opportunities or inflation. Investors use it to decide whether an investment is worthwhile, aiming for projects with positive net present value, meaning they are expected to generate more value than they cost.

irr financial

"after-tax IRR of 42.8% when using the weighted average gold price"

IRR (Internal Rate of Return) is the annualized percentage return an investment is expected to produce based on its projected series of cash outflows and inflows; mathematically, it’s the rate that makes the present value of those cash flows balance to zero. Investors use IRR to compare and rank projects or investments—similar to comparing the interest rates on savings accounts—to judge which offers the best return for the time and risk involved.

ordinary kriging technical

"gold grade was modelled by SRK using Ordinary Kriging (OK) methodology"

Ordinary kriging is a statistical method for estimating an unknown value at a location by combining nearby measured values, giving more weight to closer and more closely related samples and producing a best-fit estimate plus a measure of uncertainty. Think of it as asking neighboring sensors or samples for their opinion and averaging them intelligently based on how correlated they are; investors use it to estimate quantities like mineral grades, oil reservoir properties, soil contamination, or spatially varying financial exposure and to gauge the reliability of those estimates.

cut-off grade technical

"SRK applied an economic cut-off grade (CoG) to blocks constrained"

The cut-off grade is the minimum concentration of a mineral in rock that makes extraction and processing economically worthwhile; material below that level is treated as waste. It sets the boundary between ore and waste and directly affects reported reserves, projected mine life, and expected profits. Think of it like deciding which fruit on a tree is worth picking after accounting for the time and cost to harvest — raising or lowering that threshold can change how much “good” product a project appears to have.

metallurgical recovery technical

"Probable | 40.7 | 1.13 | 1,479 | 92.1"

Metallurgical recovery is the percentage of a desired metal that is actually extracted from mined ore during processing and sent to saleable product, like how much juice you get from squeezing fruit. It matters to investors because higher recovery means more metal produced from the same amount of ore, improving revenue and lowering unit costs, while lower recovery reduces expected output, shortens mine life and can change a project’s economic value.

net smelter returns financial

"deferred payments via a 3% net smelter returns participation payable quarterly"

A net smelter returns (NSR) royalty is a payment to a rights holder equal to a fixed percentage of the money received from selling mined metals after they have been processed and sold by a smelter or refiner, with standard processing costs deducted. Think of it like a landlord taking a percentage of a tenant’s rent after utilities are paid; for investors, an NSR affects a mine owner’s cash flow, project value, and the amount of profit available to shareholders because it reduces revenue from mineral sales.

qa/qc technical

"Crusader QA/QC program comprised submitting sample blanks, standard reference samples"

QA/QC stands for Quality Assurance and Quality Control, processes used to ensure products or services meet certain standards. Think of it as a way to check that a product is safe and works properly before reaching consumers, similar to how a chef tastes food before serving it. For investors, strong QA/QC practices indicate a company's commitment to delivering reliable, high-quality offerings, reducing risks and building trust.

AI-generated analysis. Not financial advice.

ROAD TOWN, British Virgin Islands, Feb. 26, 2026 (GLOBE NEWSWIRE) -- Aura Minerals Inc. (Nasdaq: AUGO) (B3: AURA33) (“Aura” or the “Company”) is pleased to announce that it has signed the agreement of cooperation with DNIT (Departamento Nacional de Infraestrutura Terrestre) to relocate the federal road, which crosses a portion of the Borborema mine in Rio Grande do Norte, Brazil. Also, the Company is pleased to announce an updated Technical Report of Borborema, which is already available on www.sec.gov and SEDAR+.

This agreement allows the Company to immediately advance the conversion of a significant portion of the existing Indicated Mineral Resources into Probable Mineral Reserves. Following the completion of this Technical Report, Aura increased the Mineral Reserve base by 82% for approximately 1.5 million ounces of gold.

Highlights of the Updated Feasibility Study and the Project:

• Strong Reserve Base: The Feasibility Study includes updated Mineral Resource and Reserve estimates under “SEC S-K 1300 definitions” for the comprising Probable Reserves of 40.7Mt at 1.13g/t Au containing approximately 1,479Koz. gold.
• Life of Mine 20 Years and 5 months: Weighted average annual gold production is estimated at 65 koz, with an estimated LOM of 20.5 years, based on Mineral Reserves estimated in accordance with S-K 1300 guidelines.
• Robust Project Economics: Net present value (“NPV”) of US$612.5 million (from 182 million of the previous FS) and after-tax IRR of 42.8% when using the weighted average gold price of USD 2,274/Oz considering all the operational years and the exchange rate used was BRL 5.70 for USD 1.00 in 2025 onwards.
• Exploration Potential Remains: The ore body of the Borborema deposit remains open along strike and down dip. Aura believes the project will benefit from additional drilling both to extend the Mineral Resource’s footprint and also to add more contained ounces within the current envelope of mineralization.

Rodrigo Barbosa, President and CEO of Aura, comments, "This agreement is a major milestone that significantly accelerates value creation at Borborema. Since acquiring the project, we recognized its substantial upside potential — exactly why we designed and built a fully expandable plant from the outset. With the updated reserve now at 1.5 million ounces — 82% larger than our previous feasibility study — we are immediately advancing engineering and water-access solutions to increase capacity, while progressing the road relocation. Borborema perfectly demonstrates our strategy: start production as quickly as possible, generate positive cash flow in a de-risked environment, and then unlock further upside. Looking ahead, we continue to explore additional opportunities, including a review of the mine plan with new cut-off grades based on higher gold prices, which should further improve our reserves. A new Resources & Reserves report is expected by the end of Q1, concurrent with the publication of our 20F. We remain committed to executing the project responsibly and in full alignment with our Aura 360° Mining philosophy."

Updated Mineral Resource and Mineral Reserve Estimates

The updated resource block model gold grade was modelled by SRK using Ordinary Kriging (OK) methodology constrained within nested grade shells at 0.2 g/t, 0.5 g/t, and 1.0 g/t indicatory grade shells.

SRK used a nested, soft-boundary grade shell technique with shells at 0.2, 0.5, and 1.0 g/t Au to limit the influence of variable Au grades in the broader mineralized volume which displays general lower grade attributes. Raw drilling data was composted to 2 m lengths with upper capping applied at 20 g/t Au. Kriging neighborhoods and variography were determined for each nested grade shell. The Feasibility Study block model showed acceptable validation against composited and raw data with acceptable smoothing and is considered suitable for use in reporting of Mineral Resources.

Longitudinal View of Au Grade Shells, Viewing West (Source: SRK)

SRK utilized an oxidation boundary surface constructed in 2012 by Crusader (Cascar) to discriminate oxide from sulfide mineralization as the logging data was considered too variable and of lower confidence to construct this surface. The oxidation model is utilized to code bulk density as well.

Mineral Resources are classified in accordance with S-K 1300 definitions into Indicated and Inferred categories based on identified uncertainty and risks.

In order to establish reasonable prospects for economic extraction (RPEE) as per S-K 1300 definitions of Mineral Resources, SRK applied an economic cut-off grade (CoG) to blocks constrained within an economic pit shell on the Borborema property. This shell utilizes a 1.0 revenue factor, 37-degree slope on the west and 60-degree slope on the east, 2 million tonnes per annum (Mtpa) mining rate, and 5% discount rate. A long section of the resource pit shell is shown in figure below.

Long Section, Looking West of the Economic Pit Shell. Inset Image Shows Cross Section, Looking North (Source; SRK)

Below is a cross section show the Mineral Resource pit vs. the Mineral Reserve pit shell.

A Cross Section (Local Grid) of Reserve and Resource Pit Shell (Source: SRK)

The Feasibility Study includes Mineral Resource and Reserve estimates for the Borborema deposit under S-K 1300 guidelines. Only Indicated Mineral Resources was considered for purpose of the Feasibility Study. A summary of the Borborema Mineral Resources estimates which are used in the Feasibility Study are shown in table below.

Borborema Mineral Resource Estimate* as of January 31, 2023

CLASS	Au Cut off Grade	OXIDATION	MASS (Mt)	AVERAGE GRADE (Au g/t)	TOTAL METAL (Au koz)
INDICATED	0.33 g/t	OXIDE	0.3	0.69	6.9
		SULFIDE	16.4	0.80	419.2
		TOTAL	16.7	0.80	426.1
INFERRED	0.33 g/t	OXIDE	0.1	0.83	1.9
		SULFIDE	10.7	1.12	387.3
		TOTAL	10.8	1.12	389.4

* Notes:
	1.	Mineral Resources are reported exclusive of Mineral Reserves. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.
	2.	Mineral Resources have been categorized classified as Indicated or Inferred subject to the opinion of a Qualified Person based on the quality of informing data for the estimate, consistency of geological/grade distribution, data quality, and have been validated using visual and statistical analyses.
	3.	Tonnage and contained metal have been rounded to reflect the accuracy of the estimate, and numbers may not be added due to rounding.
	4.	100% metal recovery assumption is applied for the Mineral Resources statement.
	5.	The economic CoG for Mineral Resources is based on the long-term outlook sale price of US$1,800/troy ounce of gold, 5% mine dilution, 92.1% recovery, average mining costs of US$2.00/t, processing costs of US$14.82/t, G&A of US$1.38, and sustaining capital costs of US$0.62/t.
	6.	An overall 61° (east side) and 37° (west side) pit slope angle, 0% mining dilution, and 100% mining recovery.
	7.	Mineral Resources were reported above the economic 0.33 g/t Au CoG and are constrained by an optimized pit shell.
	8.	The Qualified Person for Mineral Resources is Erik Ronald, P. Geo. (PGO #3050), Principal Consultant with SRK Consulting (U.S.), Inc. based in Denver, USA.

Mineral Reserves suitable for open pit mining methods were estimated through a comprehensive optimization exercise, utilizing Indicated Mineral Resources from the block model provided by SRK Consulting. These Mineral Reserves are defined within detailed engineered pit designs and life-of-mine (LOM) plans that are based on the optimized pit shells. Mineral Reserves within these engineered pit designs were calculated using cut-off grades (COG) specific to each rock type, considering a gold price of US$ 1,472/oz with an exchange rate of R$ 5.2/US$ 1.0, with refining costs included. The Mineral Reserves are contained within two pits. A high-voltage transmission line (HVTL) limits the pit expansion to the north. However, the previously constraining paved highway (BR-226), as indicated in the prior Technical Report (TR), no longer restricts the pit to the south. A summary of the Borborema Mineral Reserves estimates included in the Feasibility Study are shown in table below.

Borborema Mineral Reserves Estimates* (P&P) as of July 31, 2023*
BORBOREMA PROVEN AND PROBABLE (P&P) MINERAL RESERVES
Reserves Classification	Tonnage (kt)	Au (g/t)	Au (koz)	Metallurgical Recovery (%)
Proven	-	-	-	-
Probable	40.7	1.13	1,479	92.1
Proven + Probable	40.7	1.13	1,479	92.1

Notes:
	9.	CIM (2014) definitions were followed for Mineral Reserves. These definitions are consistent with the definitions in S-K 1300.
	10.	Mineral Reserves have an effective date of October 1st, 2024. The Qualified Person for the estimate is Bruno Yoshida Tomaselli, B.Sc., FAusIMM, an employee of Deswik.
	11.	Mineral Reserves are confined within an optimized pit shell that uses the following parameters: gold price including refining costs US$ 1,472/oz; mining costs US$ 2.40/t weathered material, US$ 2.80/t waste fresh rock, US$ 3.20/t ore fresh rock; processing costs US$ 14.82/t processed; general and administrative costs US$ 2.8 M/a; sustaining costs US$ 0.62/t processed; process recovery of 92.1%; mining dilution of 5%; ore recovery of 95%; pit inter-ramp angles that range from 36 – 64°. Average bulk density of 2.7 t/m³.
	12.	The point of reference for Mineral Reserves is the point of feed into the processing facility.
	13.	Tonnages and grades have been rounded in accordance with reporting guidelines. Totals may not sum due to rounding.

Mine Plan

The current open pit mine life is twenty years and five months, not including the pre-stripping period. The envisaged site layout plan is shown in Figure below including all pits, waste rock storage facilities and the following limits: current road, road bypass (BR-226 road) and high voltage transmission line (HVTL).

Site General Layout (Source: Deswik)

At Borborema Project, the orebody lies near the surface and extends to greater depths. The 20 year and 5 months LOM is planned for open pit mining.

The proposed mining operations will employ hydraulic excavators and a fleet of haul trucks with conventional open-pit methods. Excavated material will be loaded into trucks and transported either the Run of Mine (ROM) pad, the low-grade stockpile, oxide ore stockpile or the Waste Rock Storage Facilities (WRSF). Weathered material is considered to be free dig with transitional material to be lightly blasted to loosen it for digging. Fresh rock will be typically blasted on 5 m benches for ore domain and 10 m benches for the waste domain. Mine scheduling assumptions are as follows:

• Plant capacity: 2.0 Mtpy
• The maximum proportion of oxidized material in the plant is 10%
• Total material movement: approximately 16 Mtpy
• Sink rate: 100 meters (5 benches of 20 meters)
• Maximum capacity of sulfide stockpile: 5.0 Mt
• Maximum capacity of oxidized stockpile: 1.0 Mt

The stripping ratio is 5.13:1 waste to ore at 0.9=RF(revenue factor). The mine production schedule delivers 40.69 Mt of ore grading 1.13 g/t gold to the mill over the LOM. Waste tonnage totaling 224.7 Mt will be placed in the waste rock dumps.

Mining costs, including the mining contractor charges, stockpile re-handling and grade control, are estimated to average US$2.78/t mined over the LOM.

Qualified Persons

The technical content of this press release has been reviewed and approved by the QPs who were involved with preparation of the Borborema study: Homero Delboni Jr., SRK (U.S,), Inc., Farshid Ghazanfari and Bruno Yoshida Tomaselli.

The QPs are not aware of any known political, legal, environmental or other risks that could materially affect the project development.

Quality Assurance and Quality Control

Analytical work was carried out by two Certified Brazilian laboratories were contracted by Crusader for sample analyses: Bureau Veritas Laboratory (BV) and ALS Laboratory. In addition, check sampling was undertaken at Acme Analytical Laboratories Ltd (Acme) in Santiago, Chile and by Bureau Veritas’ Ultratrace Laboratory in Perth, Western Australia. Big River used SGS GEOSOL Laboratórios Ltda (Rodovia MG010, Km 24,5, bairro Angicos, CEP: 33206-240. Vespasiano/MG.) for 2021-2022 drilling campaign.

Crusader QA/QC program comprised submitting sample blanks, standard reference samples, sample duplicates, and inter‐laboratory check samples. The rate of sample submissions for blanks and reference materials was 1 in 20 samples, duplicates 1 in 25 samples (only for RC holes) and interlaboratory check assays 1 in 10 samples.

The Big River QA/QC program included submittal of both blind and non-blind control samples into the sample stream being analyzed by the SGS laboratory. Big River maintained Internal quality control by inserting minimum of one blank sample in each batch and mainly after each mineralized zone, two standards (one high grade and one low grade in each analytical batch of 40 samples (5%) and a minimum of two core duplicates in each analytical batch of 40 samples (5%); (Duplicate samples analysis were requested to the lab after received the original results - average of 5 samples per hole).

The control sample assay results of the internal QA/QC program were monitored, including the CRMs, Blanks, and coarse duplicates. Additionally, systematic checks of the digital database were conducted against the original signed Certificates of Analysis from the laboratory.

Mr. Ghazanfari has reviewed the sampling and QA/QC procedures and results thereof as verification of the sampling data disclosed above and approved the information contained in this news release.

About Aura 360° Mining

Aura is focused on mining in complete terms – thinking holistically about how its business impacts and benefits every one of our stakeholders: our company, our shareholders, our employees, and the countries and communities we serve. We call this 360° Mining.

Aura is a company focused on the development and operation of gold and base metal projects in the Americas. The Company's six operating assets include Minosa gold mine in Honduras; Almas, Apoena, Borborema and MSG gold mines in Brazil; and Aranzazu, a copper, gold, and silver mine in Mexico. Additionally, the Company owns Era Dorada, a gold project in Guatemala; Tolda Fria, a gold project in Colombia; and three projects in Brazil: Matupá, which is under development; São Francisco, which is in care and maintenance; and the Carajás copper project in the Carajás region, in the exploration phase.

Rodrigo Barbosa
President & CEO
305-239-9332

Caution Regarding Mineral Resource and Mineral Reserve Estimates

The figures for mineral resources and reserves contained herein are estimates only and no assurance can be given that the anticipated tonnages and grades will be achieved, that the indicated level of recovery will be realized or that the mineral resources and reserves could be mined or processed profitably. Actual reserves, if any, may not conform to geological, metallurgical or other expectations, and the volume and grade of ore recovered may be below the estimated levels. There are numerous uncertainties inherent in estimating mineral resources and reserves, including many factors beyond the Company’s control. Such estimation is a subjective process, and the accuracy of any reserve or resource estimate is a function of the quantity and quality of available data and of the assumptions made and judgments used in engineering and geological interpretation. Short-term operating factors relating to the mineral resources and reserves, such as the need for orderly development of the ore bodies or the processing of new or different ore grades, may cause the mining operation to be unprofitable in any particular accounting period. In addition, there can be no assurance that metal recoveries in small scale laboratory tests will be duplicated in larger scale tests under on-site conditions or during production. Lower market prices, increased production costs, the presence of deleterious elements, reduced recovery rates and other factors may result in revision of its resource and reserve estimates from time to time or may render the Company’s resources and reserves uneconomic to exploit. Resource and reserve data is not indicative of future results of operations. If the Company’s actual mineral resources and reserves are less than current estimates or if the Company fails to develop its resource base through the realization of identified mineralized potential, its results of operations or financial condition may be materially and adversely affected.

All forward-looking statements herein are qualified by this cautionary statement. Accordingly, readers should not place undue reliance on forward-looking statements. The Company undertakes no obligation to update publicly or otherwise revise any forward-looking statements whether as a result of new information or future events or otherwise, except as may be required by law. If the Company does update one or more forward-looking statements, no inference should be drawn that it will make additional updates with respect to those or other forward-looking statements.

Forward-Looking Information

This press release contains “forward-looking information” and “forward-looking statements”, as defined in applicable securities laws (collectively, “forward-looking statements”) which include, without limitation, mineral resources and mineral reserve estimates and the economic analysis resulting from the Feasibility Study (including NPV, IRR and payback periods); expected production from, and the further potential of the Company’s properties; the ability of the Company to achieve its longer-term outlook; the amount of future production over any period and LOM, capital expenditure, AISC and mine production costs, the Company’s target leverage ratio for the Project; and the completion of the conversion of Dundee’s equity interest in the Project into a net smelter returns royalty.

Known and unknown risks, uncertainties and other factors, many of which are beyond the Company’s ability to predict or control, could cause actual results to differ materially from those contained in the forward-looking statements if such risks, uncertainties or factors materialize. The Company has made numerous assumptions with respect to forward-looking information contain herein, including among other things, assumptions from the Feasibility Study, which may include assumptions on gold prices and exchange rates, which could also cause actual results to differ materially from those contained in the forward-looking statements if such assumptions prove wrong. Specific reference is made to the Company’s most recent AIF on file with certain Canadian provincial securities regulatory authorities and the Technical Reports for a discussion of some of the risk factors underlying forward-looking statements, which include, without limitation the ability of the Company to achieve its longer-term outlook and the anticipated timing and results thereof, the ability to lower costs and increase production, the ability of the Company to successfully achieve business objectives, copper and gold or certain other commodity price volatility, changes in debt and equity markets, the uncertainties involved in interpreting geological data, increases in costs, environmental compliance and changes in environmental legislation and regulation, interest rate and exchange rate fluctuations, general economic conditions and other risks involved in the mineral exploration and development industry. Readers are cautioned that the foregoing list of factors is not exhaustive of the factors that may affect the forward-looking statements.

Photos accompanying this announcement are available at

https://www.globenewswire.com/NewsRoom/AttachmentNg/ea6c6f86-614e-4249-83f2-4092fe0bbce7

https://www.globenewswire.com/NewsRoom/AttachmentNg/bf4d2d7c-c360-410b-b7a9-f2d63299dbc8

https://www.globenewswire.com/NewsRoom/AttachmentNg/8dd6b8eb-a73b-49c2-93c8-28b9b7d3de45

https://www.globenewswire.com/NewsRoom/AttachmentNg/ea225e3d-837f-4e3f-8fc7-c3d4990c868a

FAQ

How much did Aura (AUGO) increase Borborema Mineral Reserves on Feb 26, 2026?

Aura increased Borborema Mineral Reserves by 82%, bringing total Probable Reserves to ~1.5 million ounces of gold. According to the company, the road-relocation agreement enabled conversion of Indicated resources into Probable reserves.

What are the Borborema project economics reported by Aura (AUGO) on Feb 26, 2026?

The updated study shows an NPV of US$612.5M and an after-tax IRR of 42.8%. According to the company, the NPV uses a weighted average gold price of US$2,274/oz and BRL 5.70/USD exchange rate.

What is the Borborema life-of-mine and production profile in Aura's Feb 26, 2026 update?

The feasibility study estimates a 20 years, 5 months life-of-mine with weighted average annual production of about 65 koz of gold. According to the company, the schedule is based on a 2.0 Mtpa plant capacity.

What operational constraints did Aura (AUGO) disclose for Borborema on Feb 26, 2026?

Pit expansion is limited to the north by a high-voltage transmission line, and the stripping ratio is 5.13:1 waste to ore. According to the company, the existing HVTL constrains northern pit growth.

How did Aura (AUGO) model and validate Borborema mineral resources in the updated study?

SRK modelled gold using Ordinary Kriging within nested grade shells (0.2/0.5/1.0 g/t) with 2 m composites and top-cut at 20 g/t. According to the company, the block model showed acceptable validation for Resource reporting.