For immediate release

Sandfire Resources America Inc. & The Meagher County Stewardship Council Achieves Framework for a Community Benefits Agreement

WHITE SULPHUR SPRINGS, MT, March 17th, 2026 — Sandfire Resources America Inc. (“Sandfire America” or the “Company”) and the Meagher County Stewardship Council (“MCSC”) have advanced a Memorandum of Understanding (MOU) establishing a framework for a binding Community Benefits Agreement (“CBA”) associated with the proposed Black Butte Copper Project (“BBC”). Since 2019, Sandfire America and the MCSC have worked collaboratively to develop a CBA to ensure that the Meagher County community realizes long-lasting benefits from the operation of the proposed underground copper mine. Through the CBA, this partnership formalizes the Company's commitment to Meagher County while establishing a framework for ongoing engagement between the Company and the community.

This MOU is guided by three core objectives:

• Ensuring that the mine operation delivers significant and long-term socioeconomic benefits within Meagher County;
• Protect and enhance the natural environment of the region; and
• Promote transparency and ongoing communication between the Company and the community.

“This CBA framework reflects the priorities voiced by our community and a shared commitment to long-term viability. It ensures the benefits of developing the mine are shared with the great people of Meagher County.”— Andrea Massey-Farrell, Board Chair, MCSC

“This agreement reflects years of collaboration with the Meagher County community in creating multiple levels of benefits. Our collaboration represents a meaningful step forward for both the Black Butte Copper Project and the Meagher County community.”— Lincoln Greenidge, CEO, Sandfire America

Community priorities were identified through extensive public engagement, including focus groups, committee meetings, and a community-wide town hall.

These priorities include:

• Establishing a Long-Term Community Investment Fund, supported through annual contributions associated with project operations;
• Supporting educational programs and youth initiatives for local students;
• Establishing an Economic Development Revolving Loan Fund dedicated to Meagher County;
• Environmental stewardship and transparency, including Smith River watershed resilience, weed management, and independent water/environmental technical review.

“Signing the MOU represents a landmark voluntary partnership demonstrating how responsible underground mining can work in concert with local communities,” said Nancy Schlepp, VP of Communications and Government Relations for Sandfire America.

A binding decision remains subject to final CBA approval by both parties. More at https://meaghercountystewardshipcouncil.org/.