Ms. Nancy Schlepp reports

SANDFIRE RESOURCES AMERICA FILES BLACK BUTTE COPPER PROJECT PRELIMINARY FEASIBILITY STUDY

Further to the news release dated July 8, 2026, Sandfire Resources America Inc. has filed an independent preliminary feasibility study in respect of the Black Butte copper project. The PFS, titled "Sandfire Resources America Inc., Black Butte Copper Project, Preliminary Feasibility Study Update (Johnny Lee and Lowry Deposits) -- Technical Report NI 43-101," is dated July 28, 2026, and was prepared by Deepak Malhotra, PhD, SME-RM of DM Consulting LLC, Berkley Tracy, PGeo, of SRK Consulting (U.S.) Inc., Shane McLeay, FAusIMM of Entech Pty. Ltd., Patrick Williamson, qualified person of Intera Inc., and Tom Parrott, FIEAust, CPEng, NER, RPEQ, of Entech.

A copy of the PFS is available on the company's website and on SEDAR+ under Sandfire America's issuer profile.

Sandfire Resources is a mineral exploration and development company focused on advancing the Black Butte copper project, a high-grade underground copper project located in Meagher county, Montana, United States. The company's vision is to develop a modern, environmentally responsible underground copper mine that delivers long-term benefits to its shareholders, local communities and the State of Montana.