Denison Mines(DNN) - 2023 Q2 - Quarterly Report

Exhibit 99.1 FORM 51-102F3 MATERIAL CHANGE REPORT | Item | Name and Address of Company | | --- | --- | | 1: | | | | Denison Mines Corp. ("Denison" or the "Company") | | | 1100 – 40 University Avenue | | | Toronto, ON M5J 1T1 | | Item | Date of Material Change | | 2: | | | | June 26, 2023 | | Item | News Release | | 3: | | | | A news release announcing the material change was disseminated on June 26, 2023 through the facilities of CNW Group | | | (Cision), a copy of which have been filed under Denison's prof ...