Mr. Frank Guillemette, an investor, reports

EARLY WARNING PRESS RELEASE - FRANK GUILLEMETTE ANNOUNCES COMPLETION OF ACQUISITION OF COMMON SHARES OF CAPROCK MINING CORP.

Frank Guillemette, on March 18, 2026, acquired an aggregate of 957,000 common shares in the capital of Caprock Mining Corp. through the facilities of the Canadian Securities Exchange for total consideration of $105,476.97.

Immediately prior to the acquisition, the acquiror held 11,043,366 common shares and 4,633,333 common share purchase warrants of the issuer, representing approximately 12.14 per cent of Caprock's issued and outstanding common shares, assuming exercise of the common share purchase warrants held by the acquiror. As of the acquiror's early warning report dated Oct. 6, 2025, the acquiror held 8,266,666 common shares and 4,133,333 common share purchase warrants of the issuer, representing approximately 10.62 per cent of Caprock's issued and outstanding common shares, assuming exercise of the common share purchase warrants then held by the acquiror.

After giving effect to the acquisition, the acquiror now holds 12,000,666 common shares and 4,633,333 common share purchase warrants of the issuer, representing approximately 12.88 per cent of Caprock's issued and outstanding common shares, assuming exercise of the common share purchase warrants held by the acquiror. This represents an increase of approximately 1.39 per cent in the acquiror's shareholdings in Caprock and an increase of approximately 2.26 per cent in the acquiror's holdings in Caprock since the acquiror's early warning report dated Oct. 6, 2025. The securities were acquired for investment purposes only. The acquiror may from time to time increase or decrease ownership or control of securities of Caprock depending on market conditions and/or other relevant factors. A copy of the early warning report has been filed on SEDAR+.

The head office of the issuer is located at 36 Toronto St., Suite 701, Toronto, Ont., M5C 2C5. The acquiror is a resident of Chicoutimi, Que.