# EDGAR Filing Document

**Accession Number:** 0001063259
**File Stem:** 0001654954-23-002015
**Filing Date:** 2023-2
**Character Count:** 5823
**Document Hash:** 393e91cf2e9196409214c776d8894945
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001654954-23-002015.hdr.sgml**: 20230223

**ACCESSION NUMBER**: 0001654954-23-002015

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230223

**FILED AS OF DATE**: 20230223

**DATE AS OF CHANGE**: 20230223

**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:** 23659045

**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: February 23, 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.

---

| | |
|:---|:---|
|  | **DENISON MINES CORP.** |
|  | */s/ Amanda Willett* |
| Date**:** February 23, 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 | [Notice of Meeting and Record Date](denisonminescorp_nmrd.htm) |

---

## Exhibit 99.1

**Exhibit 99.1**<br>

February 22, 2023 Computershare <br> 100 University Avenue, 8th floor Toronto ON, M5J 2Y1 www.computershare.com

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>

To: All Canadian Securities Regulatory Authorities

**Subject: DENISON MINES CORP.**

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Meeting Type : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Annual General Meeting |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Record Date for Notice of Meeting : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; March 27, 2023 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Record Date for Voting (if applicable) : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; March 27, 2023 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Beneficial Ownership Determination Date : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; March 27, 2023 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Meeting Date : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; May 15, 2023<br>|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Meeting Location (if available) : | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Toronto, ON |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuer sending proxy related materials directly to NOBO: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; No |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Issuer paying for delivery to OBO: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Yes |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Notice and Access (NAA) Requirements:** |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NAA for Beneficial Holders | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Yes |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Beneficial Holders Stratification Criteria: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not Applicable |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NAA for Registered Holders | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Yes |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Registered Holders Stratification Criteria: | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Not Applicable |

---

**Voting Security Details:**

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| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **Description** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **CUSIP Number** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; **ISIN** |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; COMMON SHARES <br>| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 248356107 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CA2483561072 |

---

Sincerely,

 **Computershare**

Agent for DENISON MINES CORP.