Mr. Andy Rendle reports

COSIGO RESOURCES COMPLETES DRILLING CAMPAIGN AT TARAIRA AND ANNOUNCES NON-BROKERED CONVERTIBLE DEBENTURE FINANCING

Cosigo Resources Ltd. has demobilized its 100-per-cent-owned drill rig and support equipment from the ridge crest to its base camp on the eastern slope of the Taraira ridge, where it is being prepared for the next drilling campaign, targeted for 2027. Diamond drill core from the recently completed campaign is now being processed and prepared for dispatch to independent laboratories for analysis, as described below.

Operational update

The current drilling campaign included holes No. 26 through No. 30 along the Taraira ridge, which hosts gold mineralization within a sequence of quartz-pebble conglomerates, sandstones and iron-formation units.

The campaign extended Cosigo's cumulative drill coverage to 5.5 kilometres of the 27-kilometre Taraira ridge system -- the farthest linear extent drilled by Cosigo to date along the ridge. Two holes from the campaign -- hole No. 26 (139.83 metres) and hole No. 27 (141.5 metres) -- reached the greatest depths drilled on the property to date.

These figures describe the extent and depth of drilling completed to date. They are not an indication of the presence, continuity or grade of gold mineralization at these depths or along this length of the ridge, which can only be determined through laboratory assay results and geological interpretation of the drilled material.

The recently drilled core from the program is now being transported to Cosigo's core-cutting facility for sawing, geological logging and sample preparation ahead of dispatch to independent, ISO/IEC 17025-accredited laboratories for analysis. Cosigo continues to adopt and interpret historical airborne geophysical survey data acquired from the Colombian Geological Survey, which included its Taraira land package. This information is expected to enable optimum positioning of future drill campaigns along the broader 27-kilometre ridge system.

Diamond core and RC (reverse circulation) chips from the recently completed campaign are expected to be fully processed and dispatched to independent analytical laboratories. Depending on availability of personnel and various logistics issues, this may require as much as six weeks.

Multimethod assay testing program

Gold mineralization at Taraira is characterized by coarse, heterogeneously distributed (nugget-effect) gold, a common feature of conglomerate-hosted, placer-related and numerous other types of gold systems that can cause standard assay methods to understate or produce inconsistent grade results. To address this, Cosigo is continuing a multimethod analytical testing program across its sample set.

All analytical laboratories utilized by Cosigo are independent commercial testing laboratories accredited to ISO/IEC 17025 standards. Each laboratory has no relationship to Cosigo and acts as an independent, arm's-length service provider.

Cosigo's early results from testing programs compare original assay values to Chrysos PhotonAssay reanalyses of split material from the same sample intervals, from holes No. 21 and No. 22 (drilled in 2024).

Sample No. 70 was analyzed using a reduced sample mass due to limited available material; this result should be treated as preliminary pending confirmation with a full sample charge. These early results are broadly consistent with the nugget-effect pattern under investigation.

Hole No. 25 -- a short collar hole drilled ahead of hole No. 26 -- will also be included in this multimethod program. Its previously disclosed near-surface values (per Cosigo's news release dated Aug. 24, 2026) remain at background levels.

Conventional fire assay, which uses a small (30-to-50-gram) sample charge, has shown variability inconsistent with the coarse gold distribution observed at Taraira. Review of metallic screen analyses (Au-SCR), which process larger sample masses specifically to capture coarse gold particles, has produced more consistent results. Cosigo is also evaluating Chrysos PhotonAssay technology, a non-destructive, high-throughput method that has shown results comparable with metallic screen analysis at a lower per-sample cost. Testing across all three methods is continuing, and Cosigo will release results as they are received and reviewed by its qualified person.

Financing

Cosigo today announces a non-brokered financing of unsecured convertible debentures for aggregate gross proceeds of up to $115,500. The offering is subject to regulatory approval.

Terms of the debentures:

• Interest: 15 per cent per annum, payable at maturity;
• Term: six months from the date of issuance;
• Conversion: Prior to the maturity date, the principal amount outstanding under the debentures will automatically convert into units of Cosigo at a conversion price equal to five cents;
• Units: each unit will comprise one common share and one common share purchase warrant, with each warrant exercisable into one additional common share at a price of five cents for a period of one year.

Proceeds of the offering will be used for additional assay costs pursuant to Cosigo's new coarse-gold testing plan, for general working capital purposes and to finance Cosigo's continuing exploration program at its Taraira property.

Insider participation

Certain directors and officers of Cosigo -- Robert Collawn (chief executive officer), Ian Gibson and Andy Rendle (president and chief operating officer) and/or a company controlled by him -- are expected to participate in the offering. Participation by these individuals will constitute a related party transaction for purposes of Multilateral Instrument 61-101, Protection of Minority Security Holders in Special Transactions. The company relies upon the "Issuer Not Listed on Specified Markets" and "Fair Market Value Not More Than $2,500,000" exemptions from the formal valuation and minority shareholder approval requirements, respectively, under MI 61-101.

Regulatory

The offering and the terms described above remain subject to the receipt of all necessary regulatory approvals, including the acceptance of the TSX Venture Exchange. All securities issued pursuant to the offering will be subject to a hold period of four months and one day from the date of issuance, in accordance with applicable Canadian securities laws.

About Cosigo Resources Ltd.

Cosigo Resources is a junior exploration company trading on the TSX Venture Exchange (symbol: CSG.V). The company is focused on exploring and developing the gold potential of its properties in the Taraira district in southeastern Colombia near the border of Brazil. The company also holds a 100-per-cent interest in the Willow Creek property, located in the northern sierras of Nevada near Winnemucca, and a 100-per-cent interest in the Damian property in the Cordillera region of Colombia. It also owns 13.23 per cent of DHK Diamonds Inc., a company exploring for diamonds in the DO27 region of the Northwest Territories of Canada.

Qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Erik Ostensoe, PGeo, a geological consultant to the company and a qualified person as defined by National Instrument 43-101, Standards of Disclosure for Mineral Projects.

This qualified person review pertains solely to the scientific and technical information set out above and does not extend to the financing matters described elsewhere in this release.

We seek Safe Harbor.