Golden Minerals signs deal to sell Minera William

Mr. Pablo Castanos reports GOLDEN MINERALS ANNOUNCES SALE OF MINERA WILLIAM, S.A. DE C.V. AND EQUITY FINANCING Two of Golden Minerals Company's wholly owned subsidiaries have entered into a definitive agreement to sell 100 per cent of the issued and outstanding shares of Minera William SA de CV for $1.2-million. The company has entered into a private placement equity financing arrangement for gross proceeds of $856,463 (U.S.). On May 14, 2026, Golden and two of its wholly owned subsidiaries, ECU Silver Mining Inc. (ESM) and Golden Minerals Services Corp. (GMSC), entered into a share purchase agreement with Streamline Metals Capital Ltd. and Horizon Silver Resources Ltd., pursuant to which ESM and GMSC sold on the date hereof 100 per cent of the issued and outstanding shares of Minera William to the purchasers for an aggregate purchase price of $1.2-million (U.S.). Minera William principally held tax losses and a royalty interest in the San Diego project in Mexico. Separately, the company announces that it has entered into a subscription agreement with Streamline, pursuant to which Streamline has agreed to purchase 3.74 million common shares of Golden, in a private placement transaction, at a price of 22.9 U.S. cents per purchased share for gross proceeds of $856,463 (U.S.). Upon completion of the offering, Streamline will hold approximately 19.9 per cent of issued and outstanding shares of the company. The offering is expected to close on or around May 20, 2026, and is subject to the company receiving all required regulatory approvals. Streamline and Horizon are privately held firms based in Vancouver, B.C., that invest in mining projects. The net proceeds of the sale transaction and the offering are expected to be used by the company: (i) for working capital purposes; (ii) to advance joint venture processes in relation to the company's Sand Canyon project in Nevada and Sarita/Desierto project in Salta, Argentina; (iii) to evaluate new project opportunities, including opportunities in Bolivia; and (iv) for other general working capital and corporate purposes. "This transaction represents another important milestone in Golden's ongoing strategic repositioning," said Pablo Castanos, president and chief executive officer of Golden Minerals. "The sale of Minera William strengthens our balance sheet and provides additional flexibility as we continue to focus our resources on opportunities with stronger long-term potential. Together with the financing, these transactions improve our working capital position and support our efforts to unlock value from the company's asset portfolio. We are also very optimistic about welcoming Streamline as a significant shareholder and strategic partner, and we believe its involvement further validates the long-term potential of the company. Over the last two years, we have taken decisive steps to simplify the business, reduce liabilities and position Golden for future growth. We believe these transactions represent another important step forward in that process." We seek Safe Harbor.