Mr. Brian Edgar reports

DENISON ANNOUNCES RESULTS OF SHAREHOLDER MEETING

The nominees listed in Denison Mines Corp.'s management proxy circular dated April 3, 2023, for the annual general meeting of shareholders held in Toronto today were elected as directors of the company.

The company is also pleased to report that all other items of business presented to its shareholders at the meeting, as more particularly described in the circular, were approved.

Detailed results of the vote by proxy for the election of directors are set out in the attached table.

The company has provided more details on the results of all matters considered at the meeting in its report of voting results which has been filed under its profile on SEDAR and will be filed on EDGAR.

About Denison Mines Corp.

Denison is a uranium exploration and development company with interests focused in the Athabasca basin region of Northern Saskatchewan, Canada. The company has an effective 95-per-cent interest in its flagship Wheeler River uranium project, which is the largest undeveloped uranium project in the infrastructure-rich eastern portion of the Athabasca basin region of Northern Saskatchewan. Denison's interests in Saskatchewan also include a 22.5-per-cent ownership interest in the McClean Lake joint venture, which includes several uranium deposits and the McClean Lake uranium mill that is contracted to process the ore from the Cigar Lake mine under a toll milling agreement, plus a 25.17-per-cent interest in the Midwest Main and Midwest A deposits, and a 67.41-per-cent interest in the Tthe Heldeth Tue (THT, formerly J zone) and Huskie deposits on the Waterbury Lake property. The Midwest Main, Midwest A, THT and Huskie deposits are each located within 20 kilometres of the McClean Lake mill.

Through its 50-per-cent ownership of JCU, Denison holds additional interests in various uranium project joint ventures in Canada, including the Millennium project (JCU: 30.099 per cent), the Kiggavik project (JCU: 33.8118 per cent) and Christie Lake (JCU: 34.4508 per cent). Denison's exploration portfolio includes further interests in properties covering approximately 300,000 hectares in the Athabasca basin region.

Denison is also engaged in postclosure mine care and maintenance services through its Closed Mines group, which manages Denison's reclaimed mine sites in the Elliot Lake region and provides related services to certain third party projects.

We seek Safe Harbor.