Mr. Scott Lendrum reports

GIGA METALS LAUNCHES SUMMER GEOPHYSICS PROGRAM TO ADVANCE ATTIC ZONE

Giga Metals Corp. has commenced a property-scale geophysical survey program at its Turnagain project, a joint venture with Mitsubishi Corp.

"This program expands on the company's exploration focus to include copper, platinum and palladium mineralization," said Scott Lendrum, chief executive officer of Giga Metals. "The Attic zone is a large, underexplored area adjacent to our nickel-cobalt resource. Given the scale of the system and the depths at which we are evaluating, a combined MT/EM approach is the next logical step to unlock the significant potential of the Attic zone."

Program highlights:

• Magnetotelluric survey: three lines and 17-kilometre total; continues 2025 MT work mapping the geometry of the Turnagain ultramafic intrusive complex at depth; MT is effective in this setting as it exploits the resistivity contrast between the ultramafic and surrounding graphitic country rocks;
• Electomagnetic survey: 504 line km of HeliSAM-EM, mapping subsurface conductivity to significantly greater depth than the 2004 AeroTEM survey; HeliSAM is a semi-airborne method capable of detecting conductors beyond the reach of conventional airborne EM;
• Property-scale coverage: approximately 6.5 km by 4.5 km of multilayered geophysical coverage across the intrusive complex, supporting a broader understanding of the system and more refined targeting.

This phase of work at Turnagain is fully financed and expected to be completed over the next several weeks, with results informing continued exploration of the Attic zone into the fall of 2026.

About Giga Metals Corp.

Giga Metals' core asset is the Turnagain project, located in Northern British Columbia, which contains one of the few significant undeveloped sulphide nickel and cobalt resources in the world. Turnagain is held in Hard Creek Nickel, a subsidiary owned jointly by Giga Metals and Mitsubishi. The prefeasibility study was released in October, 2023. The Turnagain ultramafic intrusive complex is also prospective for copper, platinum and palladium mineralization in the Attic zone, an area adjacent to the known nickel resource.

Qualified person

Technical information herein has been reviewed and approved by Greg Ross, PGeo. Mr. Ross is the project manager for Giga Metals and is a qualified person under National Instrument 43-101.

We seek Safe Harbor.