UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 40-F

(Check One)

o		Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934

þ		Annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934

For the twelve months ended: December 31, 2007

Commission file number: 000-24443

DENISON MINES CORP.

(Exact name of registrant as specified in its charter)

Ontario, Canada
(Province or other jurisdiction of incorporation or organization)

1090
(Primary standard industrial classification code number)

Not Applicable
(I.R.S. employer identification number)

Atrium on Bay, 595 Bay Street, Suite 402, Toronto, Ontario M5G 2C2; Phone number: 416-979-1991
(Address and telephone number of registrant’s principal executive offices)

Denison Mines (USA) Corp.
1050 17^th Street, Suite 950
Denver, CO 80265
Phone: 303-628-7798
(Name, address and telephone number of agent for service in the United States)

Securities registered pursuant to Section 12(b) of the Act: Not applicable.

Securities registered pursuant to Section 12(g) of the Act: Common Stock without par value.

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: Not applicable.

For annual reports, indicate by check mark the information filed with this form:

þ Annual Information Form       þ Audited Annual Financial Statements

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report: 189,731,635 Common Shares

Indicate by check mark whether the registrant by filing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934 (the “Exchange Act”). If “Yes” is marked, indicate the file number assigned to the registrant in connection with such rule.

Yes o       No þ

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13(d) or 15(d) of the Exchange Act during the proceeding 12 months (or for such shorter period that the registrant has been required to file such reports); and (2) has been subject to such filing requirements in the past 90 days.

Yes þ       No o

 

 

TABLE OF CONTENTS

DISCLOSURE CONTROLS AND PROCEDURES			3
AUDIT COMMITTEE FINANCIAL EXPERT			4
CODE OF ETHICS			5
PRINCIPAL ACCOUNTANT FEES AND SERVICES			5
OFF-BALANCE SHEET ARRANGEMENTS			5
TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS			5
IDENTIFICATION OF THE AUDIT COMMITTEE			6
UNDERTAKING AND CONSENT TO SERVICE OF PROCESS			6
SIGNATURES			7
EXHIBIT INDEX			8
Annual Information Form for the Year Ended December 31, 2007
Management’s Discussion and Analysis from the 2007 Annual Report to Shareholders
Audited Financial Statements for the Year Ended December 31, 2007 including Report of the Independent Auditors, PricewaterhouseCoopers LLP
Consent Letter from PricewaterhouseCoopers LLP
Officers’ Certifications Required by Rule 13a-14(a) or Rule 15d-14(a)
Officers’ Certifications Required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code

INTRODUCTION

On December 1, 2006, International Uranium Corporation (“IUC”) and Denison Mines Inc. (“DMI”) combined their business operations by way of arrangement under the Ontario Business Corporations Act (the “Denison Arrangement”). Pursuant to the Denison Arrangement, DMI amalgamated with a subsidiary of IUC. The amalgamated companies continued as “Denison Mines Inc.” Under the Denison Arrangement, IUC acquired all of the shares of the newly amalgamated DMI in exchange for IUC shares on the basis of 2.88 IUC shares for each DMI share. Effective December 1, 2006, IUC’s articles were amended to change its name to “Denison Mines Corp.” In this Form 40-F, Denison Mines Corp. formerly known as International Uranium Corporation, is referred to as the Company.

DISCLOSURE CONTROLS AND PROCEDURES

A. Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures to ensure that information required to be disclosed in the Company’s filings under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) is recorded, processed, summarized and reported in accordance with the requirements specified in the rules and forms of the Securities and Exchange Commission (the “SEC”). The Company carried out an evaluation, under the supervision and with the participation of its management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the Company’s “disclosure controls and procedures” (as defined in the Exchange Act Rule 13a-15(e)) as of the end of the period covered by this report. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures as of December 31, 2007, are effective to ensure that information required to be disclosed by the Registrant in reports it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and is accumulated and communicated to the Registrant’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely required disclosure.

The Company’s disclosure controls and procedures are designed to provide reasonable assurance of achieving their objectives and, as indicated in the preceding paragraph, the CEO and CFO believe that the Company’s disclosure controls and procedures are effective at that reasonable assurance level, although the CEO and CFO do not expect that the disclosure controls and procedures or internal control over financial reporting will prevent or detect all errors and all fraud. A control system, no matter how well conceived or operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. The Company will continue to periodically review its disclosure controls and procedures and may make such modifications from time to time as it considers necessary.

B. Management’s Annual Report on Internal Control Over Financial Reporting

The Company’s management is responsible for establishing and maintaining an adequate system of internal control over financial reporting. Internal control over financial reporting is a process to provide reasonable assurance regarding the reliability of the Company’s financial reporting for external purposes in accordance with accounting principles generally accepted in Canada and the United States of America. Management conducted an assessment of the Company’s internal control over financial reporting based on the framework established by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control — Integrated Framework. Based on this assessment, management concluded that, as of December 31, 2007, the Company’s internal control over financial reporting is effective.

C. Report of the Independent Auditors, PricewaterhouseCoopers LLC

The report of the Company’s independent auditors regarding internal control over financial reporting is included as an Exhibit to this Form 40-F.

D. Changes in Internal Control Over Financial Reporting

There was no change in the Company’s internal control over financial reporting that occurred during the twelve month period covered by this annual report that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

AUDIT COMMITTEE FINANCIAL EXPERT

The Company’s Board of Directors has determined that all three members of its Audit Committee (Mr. Paul F. Little, Ms. Catherine Stefan, and Mr. William A. Rand), are audit committee financial experts, within the meaning of the note to paragraph 8(a) of General Instruction B of Form 40-F, and are also independent within the meaning of United States and Canadian securities regulations. A description of the education and experience of these persons is set forth in the table below:

Member Name		Education & experience relevant to performance of audit committee duties
Paul F. Little		•   Chartered Accountant (ICAO)
		•   M.B.A. (Finance)
		•   Held position of Chief Financial Officer of one public company and two private companies.
Catherine J.G. Stefan,		•   Chartered Accountant (ICAO)
Chair of the Audit		•   B.Comm
Committee		•   Held position of Chief Operating Officer of O&Y Properties Inc., President of Stefan & Associates and Executive Vice-President of Bramalea Group, Chair, Tax Committee of the Canadian Institute of Public Real Estate Companies (CIPREC).
William R. Rand		•   B.Comm (Accounting)
		•   LLB, LLM, with extensive corporate finance experience
		•   Has served on audit committees of a number of public companies

Through such education and experience, each of these three members has experience overseeing and assessing the performance of companies and public accountants with respect to the preparation, auditing and evaluation of financial statements, and has: (1) an understanding of generally accepted accounting principles and financial statements; (2) the ability to assess the general application of such principles in connection with the accounting for estimates, accruals and reserves; (3) experience analyzing and evaluating financial statements that present a breadth and level of complexity of accounting issues that are generally comparable to the breadth and complexity of issues that can reasonably be expected to be raised by the Company’s financial statements; (4) an understanding of internal controls over financial reporting; and (5) an understanding of audit committee functions.

The SEC has provided that the designation of an audit committee financial expert does not make him or her an “expert” for any purpose, impose on him or her any duties, obligations or liability that are greater than the duties, obligations or liability imposed on him or her as a member of the Audit Committee and the Board of Directors in the absence of such designation, or affect the duties, obligations or liability of any other member of the Audit Committee or Board of Directors.

CODE OF ETHICS

The Company has adopted a code of ethics that applies to the Company’s directors, officers and employees, including the chief executive officer, principal financial officer, principal accounting officer or controller, persons performing similar functions and other officers, directors and employees of the Company. A current copy of the code of ethics is available on the Company’s website at http://www.denisonmines.com.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

The following table discloses the fees billed to the Company by its external auditor during the financial year ended December 31, 2007 and the fifteen month period ended December 31, 2006. Services were billed and paid in Canadian dollars and have been translated into U.S. dollars using an average annual exchange rate of: 1.0749 for 2007, and 1.134 for 2006. The Company’s external auditor was also the auditor for DMI prior to the Denison Arrangement. Fees billed to DMI by the external auditor for the fifteen month period ended December 31, 2006 are also noted below.

Periods Ending		Audit Fees(1)				Audit Related Fees(2)				Tax Fees(3)				All Other Fees(4)
December 31, 2006		$	79,075			$	93,821			$	33,183			$	37,504
December 31, 2007		$	301,882			$	247,832			$	108,889			$	29,710

The Company’s audit committee mandate provides “All auditing services and non-audit services provided to the Corporation by the Corporation’s auditors shall, to the extent and in the manner required by applicable law or regulation, be pre-approved by the Audit Committee of the Corporation. In no circumstances shall the Corporation’s auditors provide any non-audit services to the Corporation that are prohibited by applicable law or regulation.”

The following sets forth the percentage of services described above that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X:

		2006				2007
Audit Related Fees:			100	%			100	%
Tax Fees:			100	%			100	%
All Other Fees:			100	%			100	%

OFF-BALANCE SHEET ARRANGEMENTS

The Company does not have any off-balance sheet arrangements.

TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS

At December 31, 2007, the Company had a reclamation liability of $20,389,000, the timing of which will depend upon the Company’s business objectives.

In addition, the Company’s contractual obligations as of December 31, 2007, were as follows:

						Less Than												After
		Total				One Year				1-3 Years				4-5 Years				5 Years
Operating lease obligations		$	2,753,000			$	767,000			$	974,000			$	643,000			$	369,000

IDENTIFICATION OF THE AUDIT COMMITTEE

The Company has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act. The committee members are Mr. Paul F. Little, Ms. Catherine Stefan, and Mr. William A. Rand. For further information on these members, see discussion above under “Audit Committee Financial Experts.”

UNDERTAKING AND CONSENT TO SERVICE OF PROCESS

A. Undertaking

The Company undertakes to make available, in person or by telephone, representatives to respond to inquiries made by the staff of the SEC, and to furnish promptly, when requested to do so by the SEC staff, information relating to the securities in relation to which the obligation to file an annual report on Form 40-F arises; or transactions in said securities.

B. Consent to Service of Process

The Company has previously filed with the SEC a Form F-X in connection with its common stock. Any change to the name or address of the Company’s agent for service shall be communicated promptly to the SEC by amendment to the Form F-X referencing the file number of the Company.

SIGNATURES

Pursuant to the requirements of the Exchange Act, the Company certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this annual report to be signed on its behalf by the undersigned, thereto duly authorized.

Date: March 28, 2008

EXHIBIT INDEX

99.1		Annual Information Form for the Year Ended December 31, 2007
99.2		Management’s Discussion and Analysis
99.3		Audited Annual Financial Statements for the Year ended December 31, 2007 including Report from PricewaterhouseCoopers LLP, Independent Auditors
99.4		Consent of PricewaterhouseCoopers LLP
99.5		Officers’ Certifications Required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934
99.6		Officers’ Certifications Required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code