DNN · Denison Mines Corp.

This amendment modifies Denison's existing credit agreement first executed in 2015, extending the maturity date by approximately one year to January 31, 2027. The new Adjusted Tangible Net Worth definition adjusts covenant compliance calculations for the company's convertible unsecured notes, with a minimum required threshold of $131 million. The agreement will become effective once all conditions precedent are satisfied, including payment of the $25,000 extension fee, submission of officer certificates and board resolutions, delivery of a legal opinion from Obligors' counsel, and provision of required share certificates. The Obligors have confirmed no defaults are ongoing as of the agreement's effective date, and all existing security interests under the credit agreement remain in full force and effect.