Mr. Louis Castro reports

OROSUR MINING INC ANNOUNCES EXERCISE OF RSUS

Orosur Mining Inc. has issued 2.85 million common shares (representing 0.72 per cent of the company's current issued share capital) following the exercise of 2.85 million restricted stock units (RSUs) by directors, officers and consultants of the company. All of the directors will be retaining their shares and not selling after exercise, other than Thomas Masney, one of the company's non-executive directors, who will sell 75,000 shares to cover the tax due on the shares issued to him. A full table of directors and officers subsequent holdings and exercise RSUs is shown below.

The consultants have exercised a total of 1,175,000 RSUs resulting in the issue of 1,175,000 shares.

Application has been made for 2.85 million shares, which rank pari passu with the existing shares in issue, to be admitted to trading on AIM (Alternative Investment Market). It is expected that admission will become effective and dealings will occur at 8 a.m. United Kingdom time on or around May 22, 2026.

Following admission of these 2.85 million shares, for the purposes of the disclosure guidance and transparency rules, the company will have 398,799,074 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 19,865,000 RSUs outstanding.

About Orosur Mining Inc.

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

We seek Safe Harbor.