ARIS MINING ANNOUNCES STEADY RAMP-UP AT SEGOVIA FOLLOWING SECOND MILL COMMISSIONING IN LATE JUNE

Rhea-AI Summary

Aris Mining (NYSE-A: ARMN) reports successful ramp-up at its Segovia Operations following the commissioning of a second mill in June 2025. The expansion has increased processing capacity by 50% from 2,000 to 3,000 tonnes per day (tpd).

Key operational achievements include increased milling rates to 2,415 tpd in July and August, up from 1,971 tpd in H1 2025, with several days reaching the full 3,000 tpd capacity. Gold grades maintained strong at 10.02 g/t Au. Year-to-date gold production reached 161,168 ounces, with Segovia contributing 141,893 ounces and Marmato Narrow Vein adding 4,936 ounces in July-August.

The company remains on track to meet its 2025 production guidance of 230,000-275,000 ounces.

Positive

• Second mill commissioned on time and within budget, increasing processing capacity by 50%
• Strong operating performance reaching design capacity of 3,000 tpd on multiple days
• Maintained high gold grades at 10.02 g/t Au while increasing throughput
• On track to meet 2025 production guidance of 230,000-275,000 ounces

Negative

• None.

VANCOUVER, BC, Sept. 5, 2025 /PRNewswire/ - Aris Mining Corporation (Aris Mining or the Company) (TSX: ARIS) (NYSE-A: ARMN) reports strong progress with the ramp-up at its Segovia Operations following successful commissioning of a second mill in June 2025. The expanded processing capacity has already delivered a substantial increase in mill throughput and gold production.

Key highlights:

• The second mill was successfully commissioned in late June 2025, on time and within budget, increasing installed processing capacity by 50% from 2,000 tonnes per day (tpd) to 3,000 tpd.
  
  
• Milling rates increased sharply in July and August, averaging 2,415 tpd, compared to 1,971 tpd over the six months ended June 30, 2025. In August, throughput also reached approximately 3,000 tpd on several days, demonstrating strong operating performance at design capacity.
  
  
• Processed gold grades averaged 10.02 g/t Au in July and August, which reflects disciplined use of the additional processing capacity and production growth without compromising grade.
  
  
• Year-to-date gold production at Segovia to August 31, 2025 totals 141,893 ounces, including 42,817 ounces produced in July and August.

In addition, the Marmato Narrow Vein zone contributed 4,936 ounces in July and August, bringing consolidated year-to-date gold production to 161,168 ounces. Aris Mining remains on-track to achieve its full-year 2025 production guidance of 230,000 to 275,000 ounces.

About Aris Mining

Founded in September 2022, Aris Mining was established with a vision to build a leading Latin America-focused gold mining company. Our strategy blends current production and cashflow generation with transformational growth driven by expansions of our operating assets, exploration and development projects. Aris Mining intends to unlock value through scale and diversification. The Company is listed on the TSX (ARIS) and the NYSE-A (ARMN) and is led by an experienced team with a track record of value creation, operational excellence, financial discipline and good corporate governance in the gold mining industry.

Aris Mining operates two underground gold mines in Colombia: the Segovia Operations and the Marmato Complex, which together produced 210,955 ounces of gold in 2024. With expansions underway, Aris Mining is targeting an annual production rate of more than 500,000 ounces of gold, following the commissioning of the second mill at Segovia, completed in June and ramping up during H2 2025, and the construction of the Bulk Mining Zone at the Marmato Complex, expected to start ramping up production in H2 2026. In addition, Aris Mining operates the 51% owned Soto Norte joint venture, where a PFS study is complete on a new, smaller scale development plan which confirms Soto Norte as a high-quality, long-life project with robust economics and industry-leading environmental and social design features. In Guyana, Aris Mining owns the Toroparu gold/copper project, where a new Preliminary Economic Assessment (PEA) is underway.

Colombia is rich in high-grade gold deposits and Aris Mining is actively pursuing partnerships with the Country's dynamic small-scale mining sector. With these partnerships, we enable safe, legal, and environmentally responsible operations that benefit both local communities and the industry.

Additional information on Aris Mining can be found at www.aris-mining.com, www.sedarplus.ca, and on www.sec.gov.

Cautionary Language

Qualified Person

Pamela De Mark, P.Geo., Senior Vice President Geology and Exploration of Aris Mining, is a Qualified Person as defined by NI 43-101, and has reviewed and approved the technical information contained in this news release.

Forward-Looking Information

This news release contains "forward-looking information" or forward-looking statements" within the meaning of Canadian securities legislation. All statements included herein, other than statements of historical fact, including, without limitation, statements relating to the estimated milling rates at the Segovia Operations in 2025 and statements included in the "About Aris Mining" section of this news release relating to the Segovia Operations, Marmato Complex, Soto Norte Project and Toroparu Project are forward-looking. Generally, the forward-looking information and forward looking statements can be identified by the use of forward looking terminology such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", "will continue" or "believes", or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved". The material factors or assumptions used to develop forward looking information or statements are disclosed throughout this news release.

Forward looking information and forward looking statements, while based on management's best estimates and assumptions, are subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of Aris Mining to be materially different from those expressed or implied by such forward-looking information or forward looking statements, including but not limited to those factors discussed in the section entitled "Risk Factors" in Aris Mining's annual information form dated March 12, 2025 which is available on SEDAR+ at www.sedarplus.ca and included as part of the Company's Annual report on Form 40-F, filed with the SEC at www.sec.gov.

Although Aris Mining has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking information and forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that such information or statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such information or statements. The Company has and continues to disclose in its Management's Discussion and Analysis and other publicly filed documents, changes to material factors or assumptions underlying the forward-looking information and forward-looking statements and to the validity of the information, in the period the changes occur. The forward-looking statements and forward-looking information are made as of the date hereof and Aris Mining disclaims any obligation to update any such factors or to publicly announce the result of any revisions to any of the forward-looking statements or forward-looking information contained herein to reflect future results. Accordingly, readers should not place undue reliance on forward-looking statements and information.

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SOURCE Aris Mining Corporation

FAQ

What is the new processing capacity at Aris Mining's Segovia Operations after the second mill commissioning?

After the second mill commissioning in June 2025, Aris Mining's Segovia Operations increased its processing capacity by 50% from 2,000 to 3,000 tonnes per day (tpd).

How much gold has ARMN produced year-to-date through August 2025?

Aris Mining has produced 161,168 ounces of gold year-to-date through August 2025, with 141,893 ounces from Segovia and 4,936 ounces from the Marmato Narrow Vein zone in July-August.

What are the average gold grades at ARMN's Segovia Operations in July-August 2025?

The processed gold grades at Segovia Operations averaged 10.02 g/t Au in July and August 2025, maintaining high grades while increasing throughput.

What is Aris Mining's production guidance for 2025?

Aris Mining's full-year 2025 production guidance is 230,000 to 275,000 ounces of gold, which the company remains on track to achieve.

How has the mill throughput at ARMN's Segovia Operations improved after the second mill commissioning?

Milling rates increased to 2,415 tpd in July and August 2025, up from 1,971 tpd in H1 2025, with several days reaching the full capacity of 3,000 tpd.