Leading Independent Proxy Advisory Firms ISS and Glass Lewis Recommend Calibre Mining Securityholders Vote FOR the Proposed Arrangement with Equinox Gold

• Your vote is important, regardless of the number of Calibre shares you hold.
• Securityholders are encouraged to vote in advance of the deadline on Tuesday, 29 April at 10:00 a.m. (Vancouver time).
• For assistance in voting, please contact Laurel Hill Advisory Group by phone at 1-877-452-7184 (North American toll-free) or 1-416-304-0211 (outside North America), or by email at assistance@laurelhill.com

VANCOUVER, British Columbia, April 25, 2025  — Calibre Mining Corp. (TSX: CXB; OTCQX: CXBMF) (the “Company” or “Calibre”) is pleased to announce that both Institutional Shareholder Services Inc. (“ISS”) and Glass Lewis & Co. (“Glass Lewis”), two leading independent proxy advisory firms, have recommended that Calibre Securityholders (“Securityholders”) vote FOR the resolution approving the proposed business combination between Calibre and Equinox Gold Corp. (“Equinox”) at the upcoming Special Meeting of Securityholders (the “Meeting”) scheduled for Thursday, May 1, 2025.

The Board of Directors of Calibre unanimously recommends that Securityholders vote FOR the Arrangement Resolution.

Independent Proxy Advisory Firm Recommendations

Following the announcement of the amended terms for the proposed merger between Calibre and Equinox (see news release dated April 23, 2025), Glass Lewis has updated its recommendation. Glass Lewis now recommends that Calibre Securityholders vote FOR the Arrangement Resolution, noting that the improved exchange ratio aligns with broader market expectations and offers greater downside protection while preserving the long-term upside potential of the combined company.

YOUR VOTE IS IMPORTANT – PLEASE VOTE TODAY
The proxy voting deadline is 10:00 a.m. (Vancouver time) on Tuesday, April 29, 2025.

Meeting Details

The Meeting will be held on Thursday, May 1, 2025, at 10:00 a.m. (Vancouver time) at the offices of Cassels Brock & Blackwell LLP, Suite 2200, RBC Place, 885 West Georgia Street, Vancouver, British Columbia. For complete details and access to all relevant documents related to the Meeting, please visit the Calibre Mining website here.

Securityholder Questions & Voting Assistance

Securityholders who have previously voted AGAINST the Arrangement Resolution and who wish to change their vote can simply revote in favor. For further assistance, Securityholders may contact the Company’s proxy solicitation agent:

Laurel Hill Advisory Group
Toll Free: 1-877-452-7184 (for Securityholders in North America)
International: +1 416-304-0211 (for Securityholders outside Canada and USA)
By Email: assistance@laurelhill.com

About Calibre

Calibre (TSX: CXB) is a Canadian-listed, Americas focused, growing mid-tier gold producer with a strong pipeline of development and exploration opportunities across Newfoundland & Labrador in Canada, Nevada and Washington in the USA, and Nicaragua. Calibre is focused on delivering sustainable value for Securityholders, local communities and all stakeholders through responsible operations and a disciplined approach to growth. With a strong balance sheet, a proven management team, strong operating cash flow, accretive development projects and district-scale exploration opportunities Calibre will unlock significant value.

ON BEHALF OF THE BOARD

“Darren Hall”

Darren Hall, President & Chief Executive Officer

For further information, please contact:

Ryan King
SVP Corporate Development & IR
T: 604.628.1012
E: calibre@calibremining.com
W: www.calibremining.com

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