United States Antimony Announces Shawn Winkler Appointed as Interim Chief Financial Officer

About this update from United States Antimony Corporation

"The Critical Minerals and ZEO Company" ~ Antimony, Cobalt, Tungsten, and Zeolite ~ DALLAS, TX / ACCESS Newswire / May 6, 2026 / United States Antimony Corporation ("USAC," "US Antimony," or the "Company"), (NYSE:UAMY)(NYSE Texas:UAMY), a leading producer and processor of antimony, zeolite, and other critical minerals, and the only fully integrated antimony company in the world outside of China and Russia, today announced that Richard Isaak, the Company's Senior Vice President and Chief Financial Officer, has commenced a temporary personal leave of absence effective May 4, 2026. The Board of Directors has appointed Shawn Winkler, the Company's prior Financial Consultant, to serve as Interim Chief Financial Officer during Mr. Isaak's absence, effective May 4, 2026. Mr. Isaak's leave is strictly personal related and has nothing to do with the Company's financial performance, accounting practices, internal controls, or any matter involving the Company's financial reporting. Mr. Isaak is expected to return to his role following the conclusion of the leave, currently anticipated for a minimum of two months. The Company confirms that it remains on track to release First Quarter ending March 31, 2026 financial results on May 14, 2026, as previously announced. Mr. Winkler has worked closely with Mr. Isaak throughout 2026 along with the other members of the finance team and is fully prepared to lead the Company's financial reporting process and upcoming earnings call. Shawn Winkler brings more than two decades of corporate finance, capital markets, and executive leadership experience to his role as Interim Chief Financial Officer. He most recently served as Chief Financial Officer of Burrow Global, a Texas-based full-service engineering, procurement, and construction firm serving the energy industry. Prior to his CFO tenure, Mr. Winkler spent 15 years as an investment banker at BMO Capital Markets and Deutsche Bank Securities, advising public and private clients in the natural resources sector on more than $10 billion of M&A transactions. He led capital raises across the full capital structure including IPOs, follow-on equity, high-yield and convertible notes, bank and institutional loans, and acquisition financing associated with clients of the banks were he was employed. Mr. Winkler holds an...

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