(via TheNewswire)

Vancouver, British Columbia – September 18, 2026 – TheNewswire - Bighorn Metals Corp. (CSE: HRNY) (the “Company ”) announces the results of its annual general and special meeting of shareholders held on September 17, 2026 (the “Meeting ”), provides an update on its use of available funds and confirms payment of the initial lease payment for the Marietta Project.

Annual General and Special Meeting Results

At the Meeting, shareholders approved all matters submitted for approval, including:

• fixing the number of directors at four; 

• electing Kevin O’Mahony, Jessa Patterson, Reno J. Calabrigo and Kosta Tsoutsis as directors of the Company to hold office until the next annual meeting of shareholders or until their successors are duly elected or appointed; 

• appointing Charlton & Company, Chartered Professional Accountants, as auditor of the Company for the ensuing year and authorizing the board of directors to fix the auditor’s remuneration; 

• approving, by special resolution, an amendment to the Company’s Articles to change the quorum requirement for meetings of shareholders, as described in the Company’s management information circular dated August 7, 2026 (the “Circular”); and 

• approving and ratifying the Company’s new omnibus long-term incentive plan, as described in the Circular. 

Kosta Tsoutsis, who was appointed to the board on August 27, 2026, after the Meeting materials had been distributed, was subsequently nominated and elected as a director at the Meeting. The resolution fixing the number of directors was amended at the Meeting from three to four and approved by shareholders.

The Company’s audited financial statements for the fiscal years ended September 30, 2025 and 2024, together with the auditor’s reports thereon, were also presented at the Meeting.

Further details regarding the matters approved at the Meeting are set out in the Circular, which is available under the Company’s profile on SEDAR+ at www.sedarplus.ca.

Update on Use of Available Funds

The Company provides an update to the use of available funds disclosure in its prospectus dated June 16, 2026 (the “Prospectus ”). The Prospectus anticipated unallocated working capital of $63,437 and stated that the Company did not intend to use any unallocated working capital for investor relations or promotional activities.

During the period ended June 30, 2026, the Company recovered a loan receivable, increasing its unallocated working capital. The Company has since allocated approximately $150,000 toward investor relations and promotional activities. This amount represents approximately 15% of the Company’s cash balance of $860,000 as at August 31, 2026. The allocation represents a change from the intended use of unallocated working capital disclosed in the Prospectus. All amounts in this section are expressed in Canadian dollars.

Management considers this allocation reasonable in light of the Company’s current financial position and anticipated operating requirements. Based on its current budget, management expects the Company to have sufficient capital to fund this commitment and meet its other anticipated obligations over the next 18 months.

The Company continues to pursue exploration of the Loljuh Property, its listing property.

Marietta Project

The Company also announces that it has made the initial lease payment of US$100,000 to MSM Resources LLC pursuant to the lease and option agreement effective September 3, 2026 (the “Agreement ”).

Under the Agreement, the Company has the exclusive right to explore, and an option to acquire a 100% undivided interest in, the fee land and patented mining claims comprising the Marietta property (the “Marietta Project ”), located in the Silver Star Mining District in the Excelsior Mountains, Mineral County, Nevada.

The option is exercisable for a cash purchase price of US$2,500,000, subject to the terms of the Agreement. The initial lease payment is not creditable against the purchase price payable upon exercise of the option.

About Bighorn Metals Corp.

Bighorn Metals Corp. is an exploration-stage natural resource company engaged in the evaluation, acquisition and exploration of mineral properties in North America.

The Company holds an option to acquire the Loljuh Property, comprising one mineral claim covering approximately 1,656.73 hectares in the Omineca Mining Division of central British Columbia, approximately 40 kilometres south of Smithers and 32 kilometres west of Houston. The Loljuh Property is prospective for porphyry copper-gold mineralization.

The Company also holds exclusive exploration rights and an option to acquire a 100% undivided interest in the fee land and patented mining claims comprising the Marietta Project, located in the Silver Star Mining District in the Excelsior Mountains, Mineral County, Nevada.

On behalf of the Board of Directors of:

Bighorn Metals Corp.

“Reno J. Calabrigo”

Reno J. Calabrigo

Chief Executive Officer

Phone: 1-877 913-1912

Neither the Canadian Securities Exchange nor its regulation services provider accepts responsibility for the adequacy or accuracy of this release.

Forward-Looking Information

This news release contains “forward-looking information” within the meaning of applicable Canadian securities laws. Forward-looking information includes statements regarding the Company’s intended allocation of funds to investor relations and promotional activities; anticipated operating requirements and the expectation that available capital will be sufficient to fund the Company’s commitments and other anticipated obligations over the next 18 months; planned exploration activities, the mineral potential of the Loljuh Property; and any potential exercise of the Company’s options to acquire interests in the Loljuh Property and the Marietta Project.

Forward-looking information is based on assumptions that management considers reasonable as of the date of this news release, including that actual expenditures and the timing of payments will be consistent with the Company’s current budget; that no material unanticipated costs or liabilities will arise; that the Company will be able to satisfy its obligations under the applicable property agreements and maintain its exploration and option rights; that any additional financing required will be available on acceptable terms; that required permits and approvals will be obtained; and that qualified personnel and contractors will be available. Statements regarding mineral potential and exploration activities also assume the reliability of existing geological and exploration information.

Forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those expressed or implied. These include actual expenditures exceeding budgeted amounts; changes in the allocation or timing of expenditures; unanticipated costs, liabilities or contractual obligations; fluctuations in exchange rates, commodity prices and exploration costs; the inability to obtain financing when required; exploration results differing from expectations; permitting delays; title, environmental and regulatory risks; and failure to satisfy payment, expenditure or other obligations under the applicable property agreements. These factors could cause the Company to require additional financing sooner than anticipated, revise its planned activities or lose property rights. There can be no assurance that the Company will exercise either property option or that exploration will result in the discovery of an economically viable mineral deposit.

Although the Company believes that the assumptions and expectations reflected in such forward-looking information are reasonable, there can be no assurance that they will prove to be accurate. Readers should not place undue reliance on forward-looking information. Forward-looking information is provided as of the date of this news release, and the Company undertakes no obligation to update or revise it, except as required by applicable law.

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