Mr. Russell Starr reports

GREENRIDGE EXPLORATION ANNOUNCES WINTER 2026 DRILLING PROGRAM AT THE HOOK-CARTER URANIUM PROJECT IN THE ATHABASCA BASIN, SASKATCHEWAN IN PARTNERSHIP WITH DENISON MINES

Greenridge Exploration Inc. has established plans for a winter 2026 drilling program at the Hook-Carter uranium project located in the southwestern Athabasca basin region of Saskatchewan, Canada. The project is owned 20 per cent by Greenridge and 80 per cent by Denison Mines Corp., with Denison acting as operator of exploration. Hook-Carter is interpreted to host the northeastern strike extension of the prolific Patterson Lake corridor, a fertile structural trend where multiple uranium deposits and showings have been discovered to the southwest of the project.

Highlights of the Hook-Carter 2026 drilling program:

• An exploration permit was received in early December, 2025, that will allow for geophysical surveying and up to 40 drill holes, valid to Dec. 31, 2027.
• Denison and Greenridge plan to complete up to eight diamond drill holes totalling approximately 4,600 metres, beginning in January, 2026.
• The 2026 targets were generated from the integration of high-resolution 2025 ground geophysical work with past exploration results that showed the hallmarks of a potential mineralizing system.

Russell Starr, chief executive officer of Greenridge, stated: "We are very pleased that Denison is initiating this program at Hook-Carter, being the first drilling on the project since 2019. During that hiatus, the exploration momentum along the PLC for high-grade uranium has been growing, and Greenridge is eager to see what the 2026 drilling reveals at Hook-Carter."

The 2026 drilling Program will be carried out from a temporary work camp located on the project and is expected to be completed by the end of March, 2026. Denison is committed to collaborating with indigenous peoples and communities to build long-term, respectful, trusting and mutually beneficial relationships, and aspires to avoid any adverse impacts of Denison's activities and operations, which intentions are expressed in Denison's indigenous peoples policy.

About Hook-Carter

Hook-Carter consists of 11 claims covering 25,115 hectares, and is located in the southwestern corner of the Athabasca basin approximately 147 kilometres northeast of La Loche, Sask. Hook-Carter is interpreted to host the northeastern strike extension of the PLC, which hosts NexGen Energy's Arrow uranium deposit (and a potential expansion of the width of the PLC with the recently discovered Patterson corridor East zone), Paladin Energy Ltd.'s Triple R uranium deposit, and Purepoint Uranium Group's Spitfire, Hornet and Dragon zones in a joint venture with Cameco Corp. and Orano Canada.

The project also overlies the interpreted strike extension of the Carter and Derksen corridors, each of which represent highly prospective and underexplored structural corridors.

Details of the Hook-Carter joint venture agreement

In October, 2016, ALX Resources Corp. and Denison entered into a purchase agreement whereby ALX sold an 80-per-cent interest in the project in exchange for 7.5 million common shares of Denison. ALX retained a 20-per-cent interest in Hook-Carter, and Denison agreed to finance ALX's share of the first $12.0-million of expenditures. On Nov. 15, 2019, ALX and Denison executed a written acknowledgment with respect to the deemed formation of a joint venture between them upon Denison's completion of a requirement to solely finance a minimum of $3.0-million of project expenditures within an initial 36-month financing period. From 2016 to 2023, Denison's exploration expenditures at Hook-Carter totalled approximately $7.08-million, including the completion of surface and airborne geophysical programs, as well as nearly 12,000 metres of diamond drilling.

In May, 2024, the Hook-Carter joint venture was amended whereby ALX could increase its ownership interest in the project from 20 per cent to 25 per cent by financing the next $3.0-million of exploration at the project by November, 2026. On Dec. 30, 2024, ALX was acquired by Greenridge by way of a plan of arrangement, and Greenridge beneficially assumed ALX's ownership interest and its financing obligations in the amended Hook-Carter joint venture.

Statement of qualified person

The scientific and technical information contained in this news release has been reviewed and approved by Sean Hillacre, MSc, PGeo, a geological consultant to the company, a qualified person for Greenridge as defined in National Instrument 43-101 (Standards of Disclosure for Mineral Projects). Mr. Hillacre has examined information regarding the historical and current exploration at Hook-Carter, which includes a high-level review of the historical sampling, analysis and procedures underlying the information and opinions contained herein. Management cautions that historical results collected and reported by operators unrelated to Greenridge have not been verified nor confirmed by its qualified person; however, the historical results create a scientific basis for continuing work at Hook-Carter. Management further cautions that historical results, discoveries and published resource estimates on adjacent or nearby mineral properties, or other properties located within the Athabasca basin, whether in reference to stated current resource estimates or historical resource estimates, are not necessarily indicative of the results that may be achieved on the project.

About Greenridge Exploration Inc.

Greenridge is a mineral exploration company dedicated to creating shareholder value through the acquisition, exploration and development of critical mineral projects in Canada. The company owns or has interests in 21 projects and additional claims covering approximately 274,420 hectares with considerable exposure to potential uranium, lithium, nickel, copper and gold discoveries. The company is led by an experienced management team and board of directors with significant expertise in capital raising and advancing mining projects.

Greenridge has one of the largest uranium property portfolios in Canada consisting of 13 projects and additional prospective claims covering approximately 193,200 hectares. The company has opportunities to realize value in a further eight strategic metals projects which include lithium, nickel, gold and copper exploration properties totalling approximately 81,200 hectares. Project highlights include:

• The Black Lake property, located in the northeastern Athabasca basin (40 per cent Greenridge, 50.43 per cent UEC and 8.57 per cent Orano Canada), saw a 2004 discovery hole (BL-18) return 0.69 per cent triuranium octoxide over 4.4 metres.
• The Hook-Carter property (20 per cent Greenridge and 80 per cent Denison Mines Corp.) is strategically located in the southwestern margin of the Athabasca basin, sitting approximately 13 kilometres from NexGen Energy Ltd.'s Arrow deposit and approximately 20 km from Paladin Energy's Triple R deposit.
• The Gibbons Creek property hosts high-grade uraniferous boulders located in 2013, with grades of up to 4.28 per cent U3O8, and the McKenzie Lake project saw a 2023 prospecting program return three samples which included 844 parts per million uranium total (0.101 per cent U3O8), 273 ppm U total and 259 ppm U total.
• The Nut Lake property located in the Thelon basin includes historical drilling, which intersected up to nine feet of 0.69 per cent U3O8, including 4.90 per cent U3O8 over a one-foot from eight-foot depth. In 2024, Greenridge's prospecting program located a float sample that returned 31.13 per cent U3O8, sourced from the Tundra showing.
• The Firebird nickel property has seen two drill programs (seven holes totalling 1,339 metres), where hole FN20-002 intersected 23.8 m of 0.36 per cent nickel and 0.09 per cent copper, including 10.6 m of 0.55 per cent Ni and 0.14 per cent Cu.
• The Electra nickel project 2022 drill program included results of 2,040 ppm Ni over one m and 1,260 ppm Ni over 3.5 m.

The company has strategic partnerships which include properties being operated and advanced by Denison and Uranium Energy Corp. The company's management team, board of directors and technical team bring significant expertise in capital raising and advancing mining projects, and are poised to attract new investors and raise future capital.

We seek Safe Harbor.