# EDGAR Filing Document

**Accession Number:** 0001063259
**File Stem:** 0001654954-23-003777
**Filing Date:** 2023-3
**Character Count:** 6090
**Document Hash:** 45516b43327d603894a136f19a978802
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001654954-23-003777.hdr.sgml**: 20230329

**ACCESSION NUMBER**: 0001654954-23-003777

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20230329

**FILED AS OF DATE**: 20230329

**DATE AS OF CHANGE**: 20230329

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DENISON MINES CORP.
- **CENTRAL INDEX KEY:** 0001063259
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS METAL ORES [1090]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33414
- **FILM NUMBER:** 23772627

**BUSINESS ADDRESS:**
- **STREET 1:** 40 UNIVERSITY AVE., SUITE 1100
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5J 1T1
- **BUSINESS PHONE:** (416) 979-1991

**MAIL ADDRESS:**
- **STREET 1:** 40 UNIVERSITY AVE., SUITE 1100
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5J 1T1

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** INTERNATIONAL URANIUM CORP
- **DATE OF NAME CHANGE:** 19980603

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 6-K**

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16**

**UNDER THE SECURITIES EXCHANGE ACT OF 1934**

**Date: March 29, 2023**

Commission File Number: **001-33414**

**Denison Mines Corp.** <br>

(Name of registrant)

**1100-40 University Avenue** <br>

**Toronto Ontario**

 **M5J 1T1 Canada** <br>

(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 ☐ Form 40-F ☒

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): ☐

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): ☐

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**SIGNATURES**

<br> Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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| | |
|:---|:---|
|  | **DENISON MINES CORP.** |
|  | */s/ Amanda Willett* |
| Date**:** March 29, 2023 | Amanda Willett |
|  | Vice President Legal and Corporate Secretary |

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FORM 6-K EXHIBIT INDEX

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| | |
|:---|:---|
| Exhibit Number | Description |
| 99.1 | <u>[Press release dated March 28, 2023](dml20230328-pressreleasef.htm)</u> |

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## Exhibit 99.1

**Exhibit 99.1** <br>

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| | |
|:---|:---|
| ![](denisonlogo-med.jpg) | Denison Mines Corp.<br> 1100 – 40 University Ave<br> Toronto, ON M5J 1T1<br> www.denisonmines.com<br> @DenisonMinesCo<br>|

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PRESS RELEASE

Denison Announces Filing of Annual Report on Form 40-F

**Toronto, ON – March 28, 2023** Denison Mines Corp. ('Denison' or the 'Company') (TSX: DML; NYSE American: DNN) is pleased to announce that it has filed its 2022 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 ended December 31, 2022. The Form 40-F will be available on Denison's website at <u>www.denisonmines.com</u>, and on the SEC's website at <u>www.sec.gov/edgar.shtml</u>.

Denison's Annual Information Form has also been filed with Canadian regulatory authorities and will be available on Denison's website at <u>www.denisonmines.com</u> and under the Company's profile on SEDAR at <u>www.sedar.com</u>.

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 <u>info@denisonmines.com</u> 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 Company has an effective 95% 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. A Pre-Feasibility Study was completed for Wheeler River in late 2018, considering the potential economic merit of developing Phoenix as an in-situ recovery ('ISR') operation and the Gryphon deposit as a conventional underground mining operation. Denison's interests in Saskatchewan also include a 22.5% ownership interest in the McClean Lake Joint Venture, which includes several uranium deposits and the McClean Lake uranium mill, which is contracted to process the ore from the Cigar Lake mine under a toll milling agreement, plus a 25.17% interest in the Midwest Main and Midwest A deposits and a 67.41% interest in the Tthe Heldeth Túé ('THT', formerly J Zone) and Huskie deposits on the Waterbury Lake property. The Midwest Main, Midwest A, THT and Huskie deposits are located within 20 kilometres of the McClean Lake mill.*

 *Through its 50% ownership of JCU, Denison holds additional interests in various uranium project joint ventures in Canada, including the Millennium project (JCU, 30.099%), the Kiggavik project (JCU, 33.8118%) and Christie Lake (JCU, 34.4508%).*

 *Denison's exploration portfolio includes further interests in properties covering ~300,000 hectares in the Athabasca Basin region.*

 *Denison is also engaged in post-closure 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.*

 **For more information, please contact**

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| | |
|:---|:---|
| David Cates | (416) 979-1991 ext. 362 |
| President & Chief Executive Officer |  |
| Mac McDonald | (416) 979-1991 ext. 242 |
| Executive Vice President & Chief Financial Officer |  |
| Follow Denison on Twitter | @DenisonMinesCo |

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