FORM 6-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934
Date: December 21, 2010
Commission File Number: 001-33414
Denison Mines Corp.
(Translation of registrant’s name into English)
Atrium on Bay, 595 Bay Street, Suite 402, Toronto, Ontario M5G 2C2
(Address of principal executive offices)
Indicate by check mark whether the registrant files or will file annual reports under cover Form
20-F or Form 40-F.
Form 20-F o Form 40-F þ
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by
Regulation S-T Rule 101(b)(1): o
Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K
if submitted solely to provide an attached annual report to security holders.
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by
Regulation S-T Rule 101(b)(7): o
Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K
if submitted to furnish a report or other document that the registrant foreign private
issuer must furnish and make public under the laws of the jurisdiction in which the
registrant is incorporated, domiciled or legally organized (the registrant’s “home
country”), or under the rules of the home country exchange on which the registrant’s
securities are traded, as long as the report or other document is not a press release, is
not required to be and has not been distributed to the registrant’s security holders, and,
if discussing a material event, has already been the subject of a Form 6-K submission or
other Commission filing on EDGAR.
Indicate by check mark whether by furnishing the information contained in this Form, the
registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b)
under the Securities Exchange Act of 1934.
Yes o No þ
If “Yes” is marked, indicate below the file number assigned to the registrant in connection with
Rule 12g3-2(b): 82- _____