Exhibit 99.1

Aris Mining Reports Q3 2025 RESULTS

Segovia Ramp-Up Driving Profitable Growth:
Record Revenue, Cash Flow, and Adjusted Earnings

Vancouver, Canada, October 29, 2025 – Aris Mining Corporation (Aris Mining or the Company) (TSX: ARIS; NYSE-A: ARMN) announces its financial and operating results for the three and nine months ended September 30, 2025 (Q3 2025 and 9M 2025). All amounts are in U.S. dollars unless otherwise indicated.

Q3 2025 Financial Performance

Neil Woodyer, CEO, commented “The production ramp-up at Segovia is progressing well, leading to record financial results and a cash balance of $418 million. This year, we have also delivered two major technical studies – the Soto Norte Prefeasibility Study and the Toroparu Preliminary Economic Assessment. These projects reinforce the strength of our growth pipeline beyond Segovia and Marmato, where construction of the Bulk Mining Zone remains on schedule for first gold in the second half of 2026. With record revenue, cash flow, and earnings in Q3, Aris Mining is financially strong and strategically positioned for continued growth into 2026 and beyond.”

Q3 2025 Operational Performance

Corporate and Project Development Highlights

Endnotes

1 All references to adjusted earnings, EBITDA, adjusted EBITDA, growth capital investment, cash flow after sustaining capital and income taxes, cash costs and AISC are non-GAAP financial measures in this document. These measures are intended to provide additional information to investors. They do not have any standardized meanings under IFRS, and therefore may not be comparable to other issuers and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS. Refer to the Non-GAAP Measures section in this document for a reconciliation of these measures to the most directly comparable financial measure disclosed in the Company’s financial statements.

2   Net earnings represents net earnings attributable to owners of the company, as presented in the annual and interim financial statements for the relevant period.

3  A $45.5 million non-cash loss was recognized in Q2 2025 from fair value adjustments to the Company's warrant liability, valued at $40.8 million as of June 30, 2025. The fair value of the liability is directly correlated to the Company's share price, which increased by 38% during Q2 2025 (year-to-date: 82% increase). In July 2025, the Company received an additional $60.5 million in cash proceeds from exercises of these warrants. With these exercises and the July 29, 2025 expiry of the remaining outstanding warrants, the liability has been fully extinguished, removing a source of non-cash earnings volatility from future results.

Q3 2025 Conference Call Details

Management will host a conference call on Thursday, October 30, 2025, at 9:00 a.m. New York / 6:00 a.m. Vancouver / 2:00 p.m. London / 3:00 p.m. Paris to discuss the results.

Participants may gain expedited access to the conference call by registering at Diamond Pass Registration (https://dpregister.com/DiamondPassRegistration/register?confirmationNumber=10202969&linkSecurityString=ffea2c7c50) . Once registered, call-in details will be displayed on screen which can be used to bypass the operator and avoid the call queue. Registration will remain open until the end of the live conference call.

Webcast

Conference Call

·         Toll-free North America: +1-833-821-0197

·         International: +1-647-846-2328

Audio Recording

·         After the call, an audio recording will be available via telephone until end of day November 5, 2025

·         Toll-free in the US and Canada: +1-855-669-9658

·         International: +1-412-317-0088; and using the access code: 2585542

A replay of the event will be archived at Events & Presentations - Aris Mining Corporation (https://aris-mining.com/investors/events-presentations/).

Aris Mining's Condensed Consolidated Interim Financial Statements for the three and nine months ended September 30, 2025 and 2024 and related MD&A are available on SEDAR+, in the Company’s filings with the U.S. Securities and Exchange Commission (the SEC) and in the Financials section of Aris Mining's website here. Hard copies of the financial statements are available free of charge upon written request to info@aris-mining.com.

About Aris Mining

Founded in September 2022, Aris Mining was established with a vision to build a leading South 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 complete and a Prefeasibility Study 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.

Aris Mining Contact

Cautionary Language

Non-GAAP Measures

EBITDA, adjusted EBITDA, adjusted earnings, cash cost, growth and expansion expenditures, cash flow after sustaining capital and income tax and AISC are non-GAAP financial measures. These financial measures do not have any standardized meaning prescribed under IFRS or by Generally Accepted Accounting Principles (GAAP) in the United States, and therefore may not be comparable to other issuers. For full details on these measures refer to the “Non-GAAP Financial Measures” sections of the Company’s Management’s Discussion and Analysis for the three and six months ended June 30, 2025 and 2024 and years ended December 31, 2024 and 2023 (MD&As). The MD&As are incorporated by reference into this news release and are available at www.aris-mining.com, on the Company’s profile on SEDAR+ at www.sedarplus.ca and in its filings with the SEC at www.sec.gov.

The tables below reconcile the non-GAAP financial measures contained in this news release for the current and comparative periods to the most directly comparable financial measure disclosed in the Company's interim financial statements for the three and six months ended June 30, 2025 and 2024; the three months ended March 31, 2025 and 2024, and Company’s annual financial statements for the three months and years ended December 31, 2024 and 2023.

Quarterly cash-flow summary¹

Segovia AISC Margin

Cash costs per ounce

Reconciliation of total cash costs by business unit at Segovia and Marmato to the cash costs as disclosed above.

Cash costs per ounce – Business Units (Segovia)

1 As presented in the Annual and Interim Financial Statements and notes thereto for the respective periods.

All-in sustaining costs (AISC)

Reconciliation of total AISC by business unit at Segovia and Marmato to the AISC as disclosed above.

1 As presented in the Annual and Interim Financial Statements and notes thereto for the respective periods.

All-in sustaining costs (AISC) – Segovia by Business Unit

1 As presented in the Annual and Interim Financial Statements and notes thereto for the respective periods.

Additions to mineral interests, plant and equipment

1 As presented in the Annual and Interim Financial Statements and notes for the respective periods.

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

1 As presented in the Annual and Interim Financial Statements and notes for the respective periods.

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

1 As presented in the Annual and Interim Financial Statements and notes for the respective periods.

Adjusted net earnings and adjusted net earnings per share

1 As presented in the Annual and Interim Financial Statements and notes for the respective periods.

Adjusted net earnings and adjusted net earnings per share

1 As presented in the Annual and Interim Financial Statements and notes for the respective periods.

Qualified Person and Technical Information

Pamela De Mark, P.Geo., Senior Vice President Geology and Exploration of Aris Mining, is a Qualified Person as defined by National Instrument 43-101 (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 Company’s ability to deliver on its 2025 objectives, the expected benefit from the Segovia expansion, the completion timeline and expected benefit from the Marmato Bulk Mining Zone construction, the expected completion date of the new pre-feasibility study for the Soto Norte Project, the completion date of the new preliminary economic assessment for the Toroparu Project 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.