Mr. Ian Fraser reports

FATHOM NICKEL ANNOUNCES FILING OF NI 43-101 TECHNICAL REPORT FOR PREVIOUSLY ANNOUNCED MAIDEN MINERAL RESOURCE ESTIMATE, GOCHAGER LAKE NI-CU-CO DEPOSIT, SASKATCHEWAN

Fathom Nickel Inc. has filed on SEDAR+ the independent technical report prepared in accordance with National Instrument 43-101 -- Standards of Disclosure for Mineral Projects, supporting the maiden mineral resource estimate (MRE) for its 100-per-cent-owned Gochager Lake Ni-Cu-Co (nickel-copper-cobalt) project located in Northern Saskatchewan. There are no material differences in the report from those results disclosed in the company's news release dated Sept. 10, 2026. The MRE, effective June 9, 2026, was prepared following the Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Definition Standards for Mineral Resources and Mineral Reserves (CIM, 2014) and CIM Estimation of Mineral Resources & Mineral Reserves Best Practice Guidelines (CIM, 2019).

The technical report, effective June 12, 2026, and issued Oct. 13, 2026, is titled, "National Instrument 43-101 Mineral Resource Estimate for the Gochager Lake Ni-Cu-Co Deposit and Technical Report for the Gochager Lake Ni-Cu-Co Project." The report was prepared for Fathom Nickel by Caracle Creek International Consulting Inc. and will be filed and available under the company's issuer profile at SEDAR+, and on the company's website by end of day Tuesday, Oct. 13, 2026.

Fathom is also pleased to announce that a comprehensive 3-D geological model of the Gochager Lake Ni-Cu-Co deposit is available for view at Mining Hub. The 3-D model is intended for illustrative and educational purposes and should be viewed in conjunction with the company's technical report, MRE and other disclosure documents filed on SEDAR+.

The mineral resource statement for the Gochager Lake Ni-Cu-Co project is provided in Table 1 (see company news release Sept. 10, 2026).

Qualified person

Ian Fraser, PGeo (APEGS No. 09910, APEGA No. 54846), chief executive officer, vice-president, exploration, and a director of the company and the qualified person as such term is defined by National Instrument 43-101, has verified the data disclosed in this news release, and has otherwise reviewed and approved the technical information in this news release on behalf of the company.

About Fathom Nickel Inc.

Fathom is an exploration company that is targeting magmatic nickel sulphide discoveries to secure the supply of North American critical minerals and to support the global green energy transition. The company now has a portfolio of two high-quality exploration projects located in the prolific Trans Hudson Corridor in Saskatchewan, Canada: 1) The Albert Lake project, a 90,000-plus-hectare project that hosts the historical Rottenstone Ni-Cu-Pd-Pt+Au (nickel-copper-palladium-platinum plus gold) mine; and 2) The 33,000-plus-hectare Gochager Lake project that hosts the Gochager Lake Ni-Cu-Co deposit.