Denison Announces Filing of Annual Report ON Form 40-F

Denison Mines Corp.

1100 – 40 University Ave

Toronto, ON  M5J 1T1 

www.denisonmines.com 

@DenisonMinesCo

PRESS RELEASE

DENISON ANNOUNCES FILING OF ANNUAL REPORT ON FORM 40-F

Toronto, ON – March 13, 2020 Denison Mines Corp. (“Denison” o r the “Company”) (DML: TSX; DNN :

NYSE American) is pleased to announce that it has filed its 2019 annual report on Form 40-F with the U.S.

Securities and Exchange Commission ("SEC"). Denison’s Form 40-F includes its management discussion

and analysis and audited financial statements for the year ende d December 31, 2019. The Form 40-F is

available on Denison's website at www.denisonmines.com, and on the SEC's website at

www.sec.gov/edgar.shtml.

Filed concurrently with the f iling of the Form 40-F is Denison’ s Annual Information Form, which has been

filed with Canadian regulatory authorities and is available on Denison's website at www.denisonmines.com

and under the Company's profile on SEDAR at www.sedar.com.

Holders of Denison's securities may receive a free printed copy of the Company's most recent Form 40-F

and Annual Report, including the audited financial statements, by sending an email request to

[email protected], by submitting a request online at www.de nisonmines.com, or by writing to

Denison Mines Corp., 1100 - 40 University Avenue, Toronto, Ontario, Canada M5J 1T1.

About Denison

Denison is a uranium exploration and development company with interests focused in the Athabasca Basin

region of northern Saskatchewan, Canada. The Com pany’s flagship project is the 90% owned Wheeler

River Uranium Project. Denison's interests in Saskatchewan also include a 22.5% ownership interest in the

McClean Lake Joint Venture (‘MLJV’), which includes several uranium deposits and the McClean Lake

uranium mill, which is currently processing ore fr om the Cigar Lake mine under a toll milling agreement,

plus a 25.17% interest in the Midwest deposits and a 66.57% interest in the J Zone and Huskie deposits

on the Waterbury Lake property. The Midwest, J Zone and Huskie deposits are located within 20 kilometres

of the McClean Lake mill. In addition, Denison has an extensive portfolio of exploration projects in the

Athabasca Basin region.

Denison is engaged in mine decommissioning and environmental services through its Closed Mines group

(formerly Denison Environmental Services), which manages Denison’s Elliot Lake reclamation projects and

provides post-closure mine and maintenance services to a variety of industry and government clients.

Denison is also the manager of Uranium Participation Corporation (‘UPC’), a publicly traded company listed

on the TSX under the symbol ‘U’, which invests in uranium oxide in concentrates (‘U3O8’) and uranium

hexafluoride (‘UF6’).

For more information, please contact

David Cates (416) 979-1991 ext. 362

President and Chief Executive Officer

Sophia Shane (604) 689-7842

Investor Relations

Follow Denison on Twitter @DenisonMinesCo