Mr. Louis Castro reports

OROSUR MINING INC ANNOUNCES EXERCISE OF RSUS

Orosur Mining Inc. has issued 85,000 common shares, representing 0.02 per cent of the company's current issued share capital, following the exercise of 85,000 restricted stock units (RSUs) by non-executive director Thomas Masney.

Mr. Masney will retain 50,000 of these shares and 35,000 shares have been sold to pay the applicable withholding taxes.

After this exercise and including his current holding in the company, Mr. Masney will hold 260,000 shares.

Application has been made for 85,000 common shares, which rank pari passu with the existing common shares in issue, to be admitted to trading on the AIM (Alternative Investment Market) is expected that admission will become effective and dealings will occur at 8 a.m. United Kingdom time on or around March 2, 2026.

Following admission of these 85,000 shares, for the purposes of the disclosure guidance and transparency rules, the company will have 394,632,125 common shares in issue. Shareholders may use this figure as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the issued share capital of the company.

Following admission, the company will have 2,755,004 options outstanding and 9,065,000 RSUs outstanding.

About Orosur Mining Inc.

Orosur Mining is a minerals explorer and developer currently operating in Colombia and Argentina.