6-K

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: May 9, 2024

Commission File Number: 001-33414

Denison Mines Corp.

(Name of registrant)

1100-40 University Avenue

Toronto Ontario

M5J 1T1 Canada

(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):  ☐

SIGNATURES

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.

FORM 6-K EXHIBIT INDEX

a2024reportofvotingresult

Exhibit 99.1

May 9, 2024

VIA SEDAR

Ontario Securities Commission

British Columbia Securities Commission

Alberta Securities Commission

Saskatchewan Financial Services Commission

The Manitoba Securities Commission

Authorité des marchés financiers (Québec)

Financial and Consumer Services Commission (New Brunswick)

Nova Scotia Securities Commission

Office of the Superintendent of Securities, Service Newfoundland and Labrador

Office of the Superintendent of Securities, Government of Prince Edward Island

Office of the Superintendent of Securities, Northwest Territories

Office of the Yukon Superintendent of Securities

Nunavut Securities Office

The Toronto Stock Exchange

Denison Mines Corp.

• Report of Voting Results

In accordance with Section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, we hereby advise of the results of the voting on the matters submitted to the annual general meeting (the “Meeting”) of the shareholders (the “Shareholders”) of Denison Mines Corp. (the “Corporation”) held on May 9, 2024.

The matters voted upon at the Meeting and the results of the voting were as follows:

Election of Directors

The seven nominees set forth in the Corporation’s Management Information Circular dated March 28, 2024 (the “Circular”) were elected as directors of the Corporation by a majority of votes cast by proxy or in person at the Meeting. If a ballot had been taken, based upon the scrutineer’s report on those in attendance or voting by proxy, the voting results would have been as follows:

Re-appointment of Auditors

By majority vote cast by proxy or in person at the Meeting, KPMG LLP was re-appointed auditor of the Corporation to hold office until the close of the next annual meeting of shareholders or until its successor is appointed, and the directors of the Corporation were authorized to fix the remuneration of the auditor. If a ballot had been taken, based upon the scrutineer’s report on those in attendance or voting by proxy, the voting results on the appointment of the auditors would have been as follows:

Advisory Vote on Executive Compensation

By majority vote cast by proxy or in person at the Meeting, a non-binding advisory resolution accepting the Corporation’s approach to executive compensation (the “Executive Compensation Resolution”) was approved. If a ballot had been taken, based upon the scrutineer’s report on those in attendance or voting by proxy, the voting results on the Executive Compensation Resolution would have been as follows: