Latest Agreement with U.S. Cellulose Insulation Company Further Builds on Commercial Momentum and Supports Fort Cady's Path to Bankability

HESPERIA, CA / ACCESS Newswire / July 7, 2026 / 5E Advanced Materials, Inc. ("5E" or the "Company") (NASDAQ:FEAM), a company focused on becoming a vertically integrated global leader and supplier of refined borates and advanced boron derivative materials, today announced it has signed an offtake heads of agreement ("HOA") with a domestic cellulose insulation company for the purchase of boric acid and calcium sulphate products from the Company's Fort Cady Integrated Boron Facility in Southern California. Boric acid is a required fire-retardant additive in virtually all cellulose insulation, and the agreement signals a domestic manufacturer is moving to lock in a U.S.-based supply source ahead of Fort Cady's full-scale production.

This is the third commercial offtake milestone 5E Advanced Materials has announced in approximately 60 days, following an offtake HOA signed in May 2026 with a domestic industrial manufacturer and a non-binding indication of interest signed with a second domestic industrial end-user. Combined, the agreements and indications of interest signed to date span multiple market segments and end-use markets, supporting Fort Cady's project financing discussions.