DENISON MINES CORP.

Additional information regarding the Company is available on the SEDAR+ website at www.sedarplus.ca. Further information concerning the Company, including directors’ and officers’ remuneration and indebtedness, principal holders of the Company’s securities, options to purchase securities and interests of insiders in material transactions, where applicable, is contained in the management information circular for the Company’s most recent meeting of shareholders. Additional financial information is provided in the Company’s audited consolidated financial statements and MD&A for the financial year ended December 31, 2024.

A copy of this AIF, as well as the Circular and such other information and documentation that the Company makes available via SEDAR+, can be found at www.sedarplus.ca. In addition, certain of this information is distributed to shareholders in connection with Denison’s Annual General Meeting of Shareholders. The Company will provide any of the foregoing documents subject to its rights to require people who are not security holders of the Company to pay a reasonable charge. Copies of these documents may be obtained by writing to:

Schedule A