Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G Amendment No. 10 dated August 13, 2025 relating to the Common Shares, no par value, of Galiano Gold Inc. shall be filed on behalf of the undersigned.

SUN VALLEY GOLD LLC

By: /s/ Peter F. Palmedo

Name: Peter F. Palmedo

Title:   Managing Member

PALMEDO HOLDINGS LLLP

By: /s/ Peter F. Palmedo

Name: Peter F. Palmedo

Title:   General Partner

PETER F. PALMEDO

By: /s/ Peter F. Palmedo