NXE / NexGen Energy Ltd. - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

NexGen Energy Ltd.
US ˙ NYSE ˙ CA65340P1062

Statistik Asas
LEI 529900N0IXNXB3IP7F06
CIK 1698535
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to NexGen Energy Ltd.
SEC Filings (Chronological Order)
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August 28, 2025 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 For the month of August 2025 Commission File Number: 001-380

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 For the month of August 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princ

August 28, 2025 EX-99.1

NexGen Announces New Off-Scale Mineralization Intersected at Patterson Corridor East (PCE) and Continued Expansion of High-Grade Sub Domain RK-25-254 and RK-25-256 (both intersecting 2.0 and 2.1 m of off-scale (>61,000 cps)) are located 51 m and 119

NexGen Announces New Off-Scale Mineralization Intersected at Patterson Corridor East (PCE) and Continued Expansion of High-Grade Sub Domain RK-25-254 and RK-25-256 (both intersecting 2.

August 6, 2025 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd.

August 6, 2025 EX-99.1

Condensed Interim Consolidated Financial Statements June 30, 2025 and 2024 (expressed in thousands of Canadian dollars) - Unaudited

Condensed Interim Consolidated Financial Statements June 30, 2025 and 2024 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd.

August 6, 2025 EX-99.1

NexGen Announces Doubling of Contracted Sales Volumes with 5 Million Pound Uranium Offtake Contract with Major US Utility

NexGen Announces Doubling of Contracted Sales Volumes with 5 Million Pound Uranium Offtake Contract with Major US Utility Contracted volumes double to more than 10 million pounds.

August 6, 2025 EX-99.2

Management's Discussion and Analysis For the three and six months ended June 30, 2025 (expressed in thousands of Canadian dollars, except as noted)

Management's Discussion and Analysis For the three and six months ended June 30, 2025 (expressed in thousands of Canadian dollars, except as noted) CONTENTS CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION AND STATEMENTS 3 BUSINESS OVERVIEW 5 Q2 2025 and Year to Date 2025 Highlights 5 ROOK I PROJECT OVERVIEW 7 OPERATIONS OUTLOOK 10 HEALTH, SAFETY, AND ENVIRONMENT 10 FINANCIAL RESULTS 11 Finan

August 6, 2025 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 For the month of August, 2025 Commission File Number: 001-38

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 For the month of August, 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of prin

August 6, 2025 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number 001-38072 N

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 6, 2025 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd.

August 1, 2025 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 For the month of August 2025 Commission File Number: 001-380

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 For the month of August 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princ

August 1, 2025 EX-99.1

NexGen Energy to Host Q2 2025 Conference Call on Rook I Project Developments

NexGen Energy to Host Q2 2025 Conference Call on Rook I Project Developments Vancouver, BC, Aug 1stth - NexGen Energy Ltd.

July 29, 2025 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 For the month of July 2025 Commission File Number: 001-38072

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 For the month of July 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

July 29, 2025 EX-99.1

NexGen Announces Final 2024 and New 2025 Assay Results at Rapidly Growing Patterson Corridor East (PCE)

NexGen Announces Final 2024 and New 2025 Assay Results at Rapidly Growing Patterson Corridor East (PCE) New assays from RK-25-227 return 12.

July 24, 2025 EX-99.1

NexGen Solidifies 100% Ownership of its Entire Land Package

NexGen Solidifies 100% Ownership of its Entire Land Package NexGen acquires Rio Tinto's 10% production carried interest over 39 NexGen-owned mineral claims in the Southwest Athabasca Basin, including those hosting the Patterson Corridor East (PCE) discovery.

July 24, 2025 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 For the month of July 2025 Commission File Number: 001-38072

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 For the month of July 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

June 20, 2025 EX-2

EXHIBIT 2

Extractive Sector Transparency Measures Act - Annual Report Reporting Entity Name NexGen Energy Ltd.

June 20, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NEXGEN ENERGY LTD. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NEXGEN ENERGY LTD. (Exact name of registrant as specified in its charter) British Columbia, Canada 001-38072 Not applicable (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) Suite 3150, 1021 - West Hastings Street Vanc

June 18, 2025 EX-99.1

June 18, 2025

June 18, 2025 VIA SEDAR+ The Canadian Securities Administrators in each province and territory The Toronto Stock Exchange NexGen Energy Ltd.

June 18, 2025 EX-99.1

NexGen Announces Voting Results for Election of Directors and Appoints Sharon Birkett to Its Board of Directors

NexGen Announces Voting Results for Election of Directors and Appoints Sharon Birkett to Its Board of Directors Vancouver, BC, June 18, 2025 - NexGen Energy Ltd.

June 18, 2025 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 For the month of June, 2025 Commission File Number: 001-3807

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 For the month of June, 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princi

June 18, 2025 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 For the month of June 2025 Commission File Number: 001-38072

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 For the month of June 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

June 16, 2025 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 For the month of June 2025 Commission File Number: 001-38072

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 For the month of June 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

June 16, 2025 EX-99.1

NexGen Releases 2024 Sustainability Report

NexGen Releases 2024 Sustainability Report Vancouver, BC, June 16, 2025 - NexGen Energy Ltd.

June 12, 2025 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 For the month of June 2025 Commission File Number: 001-38072

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 For the month of June 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

June 12, 2025 EX-99.1

NexGen Announces Regulatory Approval of 2025 Site Program at Rook I Property • 2025 Program includes a temporary exploration airstrip, expansion of exploration camp facilities and site access road improvements. • Patterson Corridor East ("PCE") disco

NexGen Announces Regulatory Approval of 2025 Site Program at Rook I Property • 2025 Program includes a temporary exploration airstrip, expansion of exploration camp facilities and site access road improvements.

May 27, 2025 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 For the month of May, 2025 Commission File Number: 001-38072

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 For the month of May, 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of princip

May 27, 2025 EX-99.1

NexGen Announces Best Assays from Patterson Corridor East in Hole RK-25-232

NexGen Announces Best Assays from Patterson Corridor East in Hole RK-25-232 RK-25-232 assays returned NexGen's best discovery phase intercept to date: 15.

May 13, 2025 EX-99.1

Condensed Interim Consolidated Financial Statements March 31, 2025 and 2024 (expressed in thousands of Canadian dollars) - Unaudited

Condensed Interim Consolidated Financial Statements March 31, 2025 and 2024 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd.

May 13, 2025 EX-99.2

Management's Discussion and Analysis For the three months ended March 31, 2025 (expressed in thousands of Canadian dollars, except as noted)

Management's Discussion and Analysis For the three months ended March 31, 2025 (expressed in thousands of Canadian dollars, except as noted) CONTENTS CAUTIONARY NOTE REGARDING FORWARD-LOOKING INFORMATION AND STATEMENTS 3 BUSINESS OVERVIEW 5 Q1 2025 HIGHLIGHTS 6 ROOK I PROJECT OVERVIEW 6 OPERATIONS OUTLOOK 9 HEALTH, SAFETY, AND ENVIRONMENT 10 FINANCIAL RESULTS 10 Financial Position Summary 12 Liqui

May 13, 2025 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd.

May 13, 2025 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd.

May 13, 2025 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 For the month of May, 2025 Commission File Number: 001-38072

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 For the month of May, 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of principal exe

May 12, 2025 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 For the month of May 2025 Commission File Number: 001-38072

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 For the month of May 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of principa

May 12, 2025 EX-99.1

NexGen Energy to Host Q1 2025 Conference Call on Rook I Project Developments

NexGen Energy to Host Q1 2025 Conference Call on Rook I Project Developments Vancouver, BC, May 12th - NexGen Energy Ltd.

May 9, 2025 EX-99.1

Salary, Short Term Incentive ("STI") and Long Term Incentive ("LTI")

Management Information Circular Summary This summary highlights important information about NexGen Energy Ltd.

May 9, 2025 EX-99.3

EXHIBIT 99.3

May 9, 2025 EX-99.4

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS WHEN: WHERE Tuesday, June 17, 2025 2.

May 9, 2025 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 For the month of May, 2025 Commission File Number: 001-38072

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 For the month of May, 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) 3150 - 1021 West Hastings Street, Vancouver, BC, V6E 0C3 (Address of principal exe

May 9, 2025 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 For the month of May 2025 Commission File Number: 001-38072

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 For the month of May 2025 Commission File Number: 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

May 9, 2025 EX-99.1

NexGen Files Management Information Circular in Connection with Annual General and Special Meeting of Shareholders

NexGen Files Management Information Circular in Connection with Annual General and Special Meeting of Shareholders Vancouver, BC, May 9, 2025 - NexGen Energy Ltd.

May 9, 2025 EX-99.2

ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS

ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS NexGen Energy Ltd.

March 24, 2025 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

March 24, 2025 EX-99.1

NexGen Announces Best Ever Discovery-Phase Intercept At Rook I Property

Exhibit 99.1 NexGen Announces Best Ever Discovery-Phase Intercept At Rook I Property • RK-25-232 intersects broad zone of intense mineralization including 3.9 m of >61,000 cps • High-grade subdomain doubles in size to 210 m strike and 335 m vertical extent • Represents best hole drilled at any NexGen property, including Arrow, during the discovery-phase of exploration Vancouver, BC, March 24, 2025

March 12, 2025 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

March 12, 2025 EX-99.1

NexGen Receives CNSC Commission Hearing Dates for the Rook I Project

Exhibit 99.1 NexGen Receives CNSC Commission Hearing Dates for the Rook I Project Vancouver, BC, March 11, 2025 – NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX: NXE) (NYSE: NXE) (ASX: NXG) announces that the Canadian Nuclear Safety Commission (“CNSC”) has proposed the Commission Hearing dates for NexGen’s 100% owned Rook I Project (the “Project”) to be conducted on November 19, 2025 and Febr

March 5, 2025 EX-99.8

Consent of Independent Registered Public Accounting Firm

EX-99.8 Exhibit 99.8 Consent of Independent Registered Public Accounting Firm The Board of Directors NexGen Energy Ltd. We consent to the use of our report dated March 3, 2025, on the consolidated financial statements of NexGen Energy Ltd., which comprise the consolidated statements of financial position as at December 31, 2024 and December 31, 2023, the related consolidated statements net income

March 5, 2025 40-F/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F/A (Amendment No. 1) (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F/A (Amendment No. 1) (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2024 Commission file number 001-38072 NexGen Energy Ltd. (Exact nam

March 5, 2025 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Leigh R. Curyer, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of

March 5, 2025 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Benjamin Salter, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of

March 5, 2025 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Leigh R. Curyer, Chief Executive Officer of the Com

March 5, 2025 EX-99.3

Consolidated Financial Statements December 31, 2024 and 2023 (expressed in thousands of Canadian dollars)

Exhibit 99.3 Consolidated Financial Statements December 31, 2024 and 2023 (expressed in thousands of Canadian dollars) Management’s Responsibility for Financial Reporting The accompanying audited consolidated financial statements, related note disclosures, and other financial information contained in the management’s discussion and analysis of NexGen Energy Ltd. (the “Company”) were prepared by ma

March 5, 2025 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Benjamin Salter, Chief Financial Officer of the Com

March 4, 2025 EX-99.1

ANNUAL INFORMATION FORM FOR THE FINANCIAL YEAR ENDED DECEMBER 31, 2024 March 3, 2025

EX-99.1 Exhibit 99.1 ANNUAL INFORMATION FORM FOR THE FINANCIAL YEAR ENDED DECEMBER 31, 2024 March 3, 2025 Table of Contents  ABOUT THIS ANNUAL INFORMATION FORM 1 ABOUT NEXGEN 3 GENERAL DEVELOPMENT OF THE BUSINESS 3 DESCRIPTION OF THE BUSINESS 9 DETAILS OF THE ROOK I PROJECT 10 RISK FACTORS 27 DIVIDENDS 35 DESCRIPTION OF CAPITAL STRUCTURE 35 MARKET FOR SECURITIES AND TRADING PRICE AND VOLUME 35 PRI

March 4, 2025 EX-99.11

To: NexGen Energy Ltd.

EX-99.11 Exhibit 99.11 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2024, I, Mark Hatton, P. Eng., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to my name and to the inc

March 4, 2025 40-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 15(d) of the Securiti

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2024 Commission file number 001-38072 NexGen Energy Ltd. (Exact name of registrant as s

March 4, 2025 EX-99.13

To: NexGen Energy Ltd.

EX-99.13 Exhibit 99.13 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2024, I, Mark B. Mathisen, C.P.G., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to my name and to the

March 4, 2025 EX-99.10

NexGen Energy Ltd.

EX-99.10 Exhibit 99.10 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2024, I, Jason Craven, P.Geo., Vice President

March 4, 2025 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EX-99.5 EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Benjamin Salter, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in

March 4, 2025 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Leigh R. Curyer, Chief Executive Officer of the Com

March 4, 2025 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EX-99.7 Exhibit 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2024, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Benjamin Salter, Chief Financial Officer of

March 4, 2025 EX-99.12

To: NexGen Energy Ltd.

EX-99.12 Exhibit 99.12 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2024, we hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to our firm’s name and to the inclusion and inc

March 4, 2025 EX-99.2

Management’s Discussion and Analysis For the year ended December 31, 2024 (expressed in thousands of Canadian dollars, except as noted)

EX-99.2 Exhibit 99.2 Management’s Discussion and Analysis For the year ended December 31, 2024 (expressed in thousands of Canadian dollars, except as noted) CONTENTS Cautionary Note Regarding Forward-Looking Information And Statements 3 Business Overview 4 2024 Highlights 5 Rook I Project Overview 7 Operations Outlook 10 Health, Safety, and Environment 11 Financial Results 11 Financial Position Su

March 4, 2025 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EX-99.4 EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Leigh R. Curyer, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in

March 4, 2025 EX-99.3

Consolidated Financial Statements December 31, 2024 and 2023 (expressed in thousands of Canadian dollars)

Exhibit 99.3 Consolidated Financial Statements December 31, 2024 and 2023 (expressed in thousands of Canadian dollars) Management’s Responsibility for Financial Reporting The accompanying audited consolidated financial statements, related note disclosures, and other financial information contained in the management’s discussion and analysis of NexGen Energy Ltd. (the “Company”) were prepared by ma

March 4, 2025 EX-99.8

Consent of Independent Registered Public Accounting Firm

Exhibit 99.8 KPMG LLP 777 Dunsmuir Street Vancouver, BC V7Y 1K3 Canada Tel 604-691-3000 Fax 604-691-3031 www.kpmg.ca Consent of Independent Registered Public Accounting Firm The Board of Directors NexGen Energy Ltd. We consent to the use of our report dated March 3, 2025, on the consolidated financial statements of NexGen Energy Ltd., which comprise the consolidated statements of financial positio

March 4, 2025 EX-99.14

Code of Ethics NexGen’s Commitment

EX-99.14 Exhibit 99.14 Code of Ethics NexGen’s Commitment REPUTATION AND VALUES The reputation of NexGen Energy Ltd. (the “Corporation”) and all its affiliated entities, other than those controlled entities that have securities listed on a securities exchange and are subject to their own corporate governance standards and policies, (collectively, “NexGen”) is one of its most important assets. The

March 4, 2025 EX-99.9

NexGen Energy Ltd.

Exhibit 99.9 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2024, I, Kevin Small, P.Eng., Senior Vice President of E

March 3, 2025 EX-99.1

NexGen Energy to Host 2024 Year End Conference Call

Exhibit 99.1 NexGen Energy to Host 2024 Year End Conference Call VANCOUVER, BC, March 3, 2025 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the Company will host its 2024 year-end and forth quarter conference call on Wednesday, March 5, 2025, at 8:30 am Eastern Standard Time. During the call, NexGen's President and Chief Executive O

March 3, 2025 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

January 30, 2025 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

January 30, 2025 EX-99.1

NexGen Commences Expanded 43,000 Meter Drill Program at Patterson Corridor East

Exhibit 99.1 NexGen Commences Expanded 43,000 Meter Drill Program at Patterson Corridor East VANCOUVER, BC, Jan. 30, 2025 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is excited to announce the commencement of a 43,000 meter (m) exploration drill program to continue to test the extents and growth of mineralization discovered in early 2024 at Patterson Co

December 4, 2024 EX-99.1

NexGen Announces First Uranium Sales Contracts for 5 Million Pounds with Major US Utilities

Exhibit 99.1 NexGen Announces First Uranium Sales Contracts for 5 Million Pounds with Major US Utilities Contracts feature market-related pricing mechanisms at time of delivery aligned with NexGen's stated marketing strategy Strategic short-term agreements position NexGen to maximize value in strengthening uranium market VANCOUVER, BC, Dec. 4, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Comp

December 4, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 19, 2024 EX-99.1

NexGen Achieves Major Permitting Milestone

Exhibit 99.1 NexGen Achieves Major Permitting Milestone · The Canadian Nuclear Safety Commission (“CNSC”) has notified NexGen of successful completion of final Federal technical review. · This is the key requirement to scheduling a Federal Commission Hearing date and subsequent Federal Project approval decision. · The Federal Environmental Assessment (“EA”) and License represent the final major ap

November 19, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 14, 2024 SC 13G

NXE / NexGen Energy Ltd. / Global X Management CO LLC - SC 13G Passive Investment

SC 13G 1 ef20038666sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION STATEMENT TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b) (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (b) NexGen Energy Ltd. (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 65340P106 (CUSIP Number) Septem

November 12, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 12, 2024 EX-99.1

NexGen Announces Best Hole to Date (RK-24-222) and High-Grade Expansion at Patterson Corridor East Concluding a Successful 2024 Drilling Program

Exhibit 99.1 NexGen Announces Best Hole to Date (RK-24-222) and High-Grade Expansion at Patterson Corridor East Concluding a Successful 2024 Drilling Program NexGen's 2024 exploration campaign delivered a new discovery on Rook I at Patterson Corridor East ("PCE") 3.5km east of Arrow. Subsequent drilling has materially expanded the mineralized zone to 600 m strike length and 600 m vertical extent w

November 8, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 8, 2024 EX-99.2

Management’s Discussion and Analysis For the three and nine months ended September 30, 2024 (expressed in thousands of Canadian dollars, except as noted)

EXHIBIT 99.2 Management’s Discussion and Analysis For the three and nine months ended September 30, 2024 (expressed in thousands of Canadian dollars, except as noted) Contents Cautionary Note Regarding Forward-Looking Information And Statements 3 Business Overview 4 Q3 2024 and Year to Date 2024 Highlights 5 Rook I Project Overview 7 Operations Outlook 9 Health, Safety, and Environment 9 Financial

November 8, 2024 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

EXHIBIT 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended September 30, 2024. 2. No misrepresentations: Based on my kn

November 8, 2024 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

EXHIBIT 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended September 30, 2024. 2. No misrepresentations: Based on my knowl

November 8, 2024 EX-99.1

Condensed Interim Consolidated Financial Statements September 30, 2024 and 2023 (expressed in thousands of Canadian dollars) - Unaudited

EXHIBIT 99.1 Condensed Interim Consolidated Financial Statements September 30, 2024 and 2023 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited September 30, 2024 December 31, 2023 January 1, 2023 Assets Restated - Note 3(d) Restated - Note 3(d) Current

October 31, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number 001-38072

6-K 1 nexgen6k.htm FORM 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C.

October 31, 2024 EX-99.1

NexGen Energy to Host Q3 2024 Conference Call on Rook I Project Developments

EX-99.1 2 ex991.htm NEWS RELEASE DATED OCTOBER 31, 2024 Exhibit 99.1 NexGen Energy to Host Q3 2024 Conference Call on Rook I Project Developments VANCOUVER, BC, Oct. 31, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the Company will host its 2024 third quarter conference call on Tuesday, November 12, 2024, at 8:30 am Eastern St

August 8, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 N

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 8, 2024 EX-99.1

Figure 1: Schematic plan view of mineralized footprint at Arrow and PCE at the same stage of drilling; gravity as background with low values in blue (CNW Group/NexGen Energy Ltd.) Figure 2: Schematic long section of mineralized footprint at Arrow and

Exhibit 99.1 NexGen Announces Best Hole (RK-24-207) to Date and Material Expansion of Mineralized Zone at Patterson Corridor East VANCOUVER, BC, Aug. 8, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the mineralized zone at Patterson Corridor East (PCE) has materially expanded since the original discovery in the 2024 Winter Prog

August 7, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 7, 2024 EX-99.1

Condensed Interim Consolidated Financial Statements June 30, 2024 and 2023 (expressed in thousands of Canadian dollars) - Unaudited

Exhibit 99.1 Condensed Interim Consolidated Financial Statements June 30, 2024 and 2023 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited June 30, 2024 December 31, 2023 January 1, 2023 Assets Restated - Note 3(d) Restated - Note 3(d) Current assets Cas

August 7, 2024 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended June 30, 2024. 2. No misrepresentations: Based on my knowled

August 7, 2024 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended June 30, 2024. 2. No misrepresentations: Based on my knowledge,

August 7, 2024 EX-99.2

Management’s Discussion and Analysis For the three and six months ended June 30, 2024 (expressed in thousands of Canadian dollars, except as noted)

Exhibit 99.2 Management’s Discussion and Analysis For the three and six months ended June 30, 2024 (expressed in thousands of Canadian dollars, except as noted) CONTENTS Cautionary Note Regarding Forward-Looking Information And Statements 3 Business Overview 4 Q2 2024 and Year to Date 2024 Highlights 5 Rook I Project Overview 6 Operations Outlook 11 Health, Safety, and Environment 12 Financial Res

August 2, 2024 EX-99.1

NexGen Energy to Host Q2 2024 Conference Call on Rook I Project Developments

Exhibit 99.1 NexGen Energy to Host Q2 2024 Conference Call on Rook I Project Developments VANCOUVER, BC, Aug. 2, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the Company will host its 2024 second quarter conference call on Thursday, August 8, 2024, at 8:30 am Eastern Standard Time. During the call, NexGen's President and Chief

August 2, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 N

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 1, 2024 EX-99.1

Average Free Cash Flow (Y1 – 5) (C$ billion)

Exhibit 99.1 NexGen Provides Updated Economics for the Rook I Project Revised Capital Cost C$2.2 Billion /USD$1.58 Billion (C$/US$ 0.72) Average Annual After-Tax Net Cash Flow (Years 1-5) of C$1.93 Billion (at US$95/lb U3O8) Consistent Mine Life and Production Capability up to 30 Million Pounds U3O8 Annually Elite Environmental Plan Incorporates Reclamation during Operations resulting in minimal C

August 1, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 N

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

July 5, 2024 EX-2.01.INS

XBRL INSTANCE DOCUMENT

0001698535 2023-01-01 2023-12-31 0001698535 nxe:CanadaProjectsMember nxe:RookIMember 2023-01-01 2023-12-31 0001698535 country:CA nxe:GovernmentOfBritishColumbiaDepartmentOfMinistryOfFinanceMember 2023-01-01 2023-12-31 0001698535 country:CA nxe:NorthernHamletOfStGeorgesHillMember 2023-01-01 2023-12-31 0001698535 country:CA nxe:NorthernVillageOfLaLocheAndCommunityMember 2023-01-01 2023-12-31 0001698

July 5, 2024 EX-2.01.SCH

XBRL TAXONOMY EXTENSION SCHEMA

CANADA Birch Narrows Dene Nation [Member] Buffalo River Dene Nation [Member] Clearwater Clearlake Metis Economic Development Corporation [Member] Clearwater River Dene Nation [Member] English River First Nation [Member] Government of British Columbia Department of Ministry of Finance [Member] Government of Canada Department of Canadian Nuclear Safety Commission [Member] Government of Canada Depart

July 5, 2024 EX-2

NexGen Energy Ltd.

Exhibit 2.01 Extractive Sector Transparency Measures Act - Annual Report          Reporting Entity Name NexGen Energy Ltd. Reporting Year From  1/1/2023    To:  12/31/2023  Date submitted  6/6/2024  Reporting Entity ESTMA Identification Number E186014 Original Submission Amended Report Other Subsidiaries Included (optional field) Not Consolidated Not Substituted Attestation by Reporting Entity In

July 5, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NEXGEN ENERGY LTD. (Exact name of registrant as specified in its charter) British Columbia, Canada 001-38072 Not applicable (State or other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report NEXGEN ENERGY LTD. (Exact name of registrant as specified in its charter) British Columbia, Canada 001-38072 Not applicable (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) Suite 3150, 1021 - West Hastings Street Vanc

June 24, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 Nex

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 24, 2024 EX-99.1

NexGen Advances Through Completeness Check for the Final Federal Environmental Assessment Process

Exhibit 99.1 NexGen Advances Through Completeness Check for the Final Federal Environmental Assessment Process VANCOUVER, BC, June 24, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that on June 21, 2024 the Canadian Nuclear Safety Commission ("CNSC") concluded their 30-day completeness check of NexGen's May 21, 2024 submission

June 18, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 Nex

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 18, 2024 EX-99.1

June 18, 2024

Exhibit 99.1 June 18, 2024 VIA SEDAR+ The Canadian Securities Administrators in each province and territory The Toronto Stock Exchange NexGen Energy Ltd. - Report of Voting Results Pursuant to Section 11.3 of National Instrument 51-102 - Continuous Disclosure Obligations, this report briefly describes the matters voted upon and the outcome of the votes at the 2023 Annual General Meeting (the “Meet

June 18, 2024 EX-99.1

NexGen Announces Voting Results from its 2024 Annual Meeting of Shareholders

Exhibit 99.1 NexGen Announces Voting Results from its 2024 Annual Meeting of Shareholders VANCOUVER, BC, June 17, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the voting results from its Annual General Meeting of Shareholders ("Meeting") held on June 17, 2024. Shareholders voted in favour of all matters of business before the

June 18, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 Nex

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 18, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 Nex

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 18, 2024 EX-99.1

NexGen Announces the Appointment of Susannah Pierce to its Board of Directors

Exhibit 99.1 NexGen Announces the Appointment of Susannah Pierce to its Board of Directors VANCOUVER, BC, June 18, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the appointment of Susannah Pierce to the Company Board to Directors following the Company's 2024 Annual General Meeting that took place Monday, June 17th, 2024. Susann

May 29, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 29, 2024 EX-99.1

NexGen Announces Closing of Strategic Purchase of 2.7 Million Pounds of Uranium

Exhibit 99.1 NexGen Announces Closing of Strategic Purchase of 2.7 Million Pounds of Uranium VANCOUVER, BC, May 28, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has closed its previously announced purchase (the "Purchase") of 2,702,410 pounds natural uranium concentrate ("U3O8") for an aggregate purchase price of US$25

May 29, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 29, 2024 EX-99.1

NexGen Announces Additional Mineralization Discovered at Patterson Corridor East, Assays from RK-24-183 and Commencement of Expanded Summer Exploration Program

Exhibit 99.1 NexGen Announces Additional Mineralization Discovered at Patterson Corridor East, Assays from RK-24-183 and Commencement of Expanded Summer Exploration Program VANCOUVER, BC, May 29, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce drilling at Patterson Corridor East ("PCE") has intersected mineralization in RK-24-193

May 29, 2024 EX-99.1

NEXGEN ENERGY LTD. COMPUTERSHARE TRUST COMPANY OF CANADA TRUST INDENTURE Providing for the Issue of 9.0% 2024 Unsecured Convertible Debentures May 28, 2024 TABLE OF CONTENTS

Exhibit 99.1 NEXGEN ENERGY LTD. AND COMPUTERSHARE TRUST COMPANY OF CANADA TRUST INDENTURE Providing for the Issue of 9.0% 2024 Unsecured Convertible Debentures May 28, 2024 TABLE OF CONTENTS ARTICLE 1 INTERPRETATION - 1 - 1.1 Definitions - 1 - 1.2 Meaning of “Outstanding” - 8 - 1.3 Interpretation - 8 - 1.4 Headings, Etc. - 9 - 1.5 Time of Essence - 9 - 1.6 Day not a Business Day - 9 - 1.7 Applicab

May 29, 2024 EX-99.2

Form 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.2 Form 51-102F3 MATERIAL CHANGE REPORT Item 1 Name and Address of Company NexGen Energy Ltd. (the “Company” or “NexGen”) Suite 3150, 1021 West Hastings Street Vancouver, BC V6E 0C3 Item 2 Date of Material Change May 28, 2024 Item 3 News Release On May 28, 2024, the Company issued a news release reporting the material change through CNW (Canada NewsWire). Item 4 Summary of Material Chang

May 29, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 22, 2024 EX-99.1

NexGen Releases 2023 Sustainability Report

Exhibit 99.1 NexGen Releases 2023 Sustainability Report VANCOUVER, BC, May 22, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the release of its 2023 Sustainability Report ("the Report") that covers the period January 1, 2023 to December 31, 2023. The Report marks the fourth year that NexGen has reported on the Company's robust

May 22, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 21, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 21, 2024 EX-99.1

NexGen Advances Federal Environmental Assessment Process Through Submission of Responses to Remaining Information Requests

Exhibit 99.1 NexGen Advances Federal Environmental Assessment Process Through Submission of Responses to Remaining Information Requests VANCOUVER, BC, May 21, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that on May 21st, the Company is submitting to the Federal regulator – the Canadian Nuclear Safety Commission ("CNSC") – res

May 14, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 14, 2024 EX-99.1

NexGen Closes C$224 Million CDI Offering in Australia

Exhibit 99.1 NexGen Closes C$224 Million CDI Offering in Australia VANCOUVER, BC, May 14, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that the Company has closed its previously announced offering (the "Offering") of 20,161,290 common shares, settled in the form of CHESS Depository Interests ("CDIs"), at a price of C$11.11 per

May 9, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 9, 2024 EX-99.1

NexGen Energy to Host Q1 2024 Conference Call on Rook I Project Developments

Exhibit 99.1 NexGen Energy to Host Q1 2024 Conference Call on Rook I Project Developments VANCOUVER, BC, May 9, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the Company will host its 2024 first quarter conference call on Tuesday, May 14, 2024, at 8:30 am Eastern Standard Time. During the call, NexGen's President and Chief Exec

May 9, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 9, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 9, 2024 EX-99.1

Form 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.1 Form 51-102F3 MATERIAL CHANGE REPORT Item 1 Name and Address of Company NexGen Energy Ltd. (the “Corporation” or “NexGen”) Suite 3150, 1021 West Hastings Street Vancouver, BC V6E 0C3 Item 2 Date of Material Change May 8, 2024 Item 3 News Release On May 8, 2024, the Corporation issued a news release reporting the material change through CNW (Canada NewsWire). Item 4 Summary of Material

May 9, 2024 EX-99.1

Your vote is important - please vote today.

Exhibit 99.1 NexGen Files Management Information Circular in Connection with Annual General Meeting of Shareholders VANCOUVER, BC, May 8, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE MKT: NXE) (ASX: NXG) is pleased to announce it has mailed a Notice of Meeting and Management Information Circular to shareholders of record as of May 1 2024 in connection with the Annua

May 8, 2024 EX-99.4

NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS

Exhibit 99.4 NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS WHEN: WHERE Monday, June 17, 2024 2.00 p.m. (Pacific time) The Offices of NexGen Energy Ltd. Suite 3150 - 1021 West Hasting Street Vancouver, BC, V6E 0C3 Shareholders will also be able to access but not participate in the formal aspect of the Meeting by webcast or teleconference using the details below: WEBCAST URL: https://app.webinar.

May 8, 2024 EX-99.1

NexGen Announces Strategic Purchase of 2.7 Million Pounds of Uranium with Issuance of US$250 Million Convertible Debenture

Exhibit 99.1 NexGen Announces Strategic Purchase of 2.7 Million Pounds of Uranium with Issuance of US$250 Million Convertible Debenture VANCOUVER, BC, May 8, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has entered into a binding term sheet with MMCap International Inc. SPC ("MMCap") for the purchase (the "Purchase") o

May 8, 2024 EX-99.1

NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS

Exhibit 99.1 Message from the Chair of the Board chris mcfadden Dear Valued Shareholders, You are invited to attend the Annual General Meeting of Shareholders (the “Meeting”) of NexGen Energy Ltd. (“NexGen” or the “Company”), which will be held on June 17, 2024, at 2:00 p.m. (Pacific Time) at the offices of NexGen located at 1021 West Hastings Street, Suite 3150, Vancouver, British Columbia. I, as

May 8, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 8, 2024 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended March 31, 2024. 2. No misrepresentations: Based on my knowledge

May 8, 2024 EX-99.2

ANNUAL GENERAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS

Exhibit 99.2 ANNUAL GENERAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS NexGen Energy Ltd. ("NexGen") has chosen to use the notice and access model for delivery of meeting materials to its shareholders. Under notice and access, shareholders still receive a proxy or voting instruction form enabling them to vote at the shareholders' meeting. However, instead of receiving a

May 8, 2024 EX-99.3

EX-99.3

Exhibit 99.3

May 8, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexG

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 8, 2024 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended March 31, 2024. 2. No misrepresentations: Based on my knowle

May 8, 2024 EX-99.1

Condensed Interim Consolidated Financial Statements For the three months ended March 31, 2024 (expressed in thousands of Canadian dollars) - Unaudited

Exhibit 99.1 Condensed Interim Consolidated Financial Statements For the three months ended March 31, 2024 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited As at March 31, 2024 December 31, 2023 January 1, 2023 Assets Restated - Note 3(c) Restated - No

May 8, 2024 EX-99.2

Management’s Discussion and Analysis For the three months ended March 31, 2024 (expressed in thousands of Canadian dollars, except as noted)

Exhibit 99.2 Management’s Discussion and Analysis For the three months ended March 31, 2024 (expressed in thousands of Canadian dollars, except as noted) Contents Cautionary Note Regarding Forward-Looking Information And Statements 3 Business Overview 4 Q1 2024 Highlights 5 Operations Outlook 10 Health, Safety, and Environment 10 Financial Results 11 Financial Position Summary 13 Liquidity and Cap

May 8, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 2, 2024 EX-99.2

NEXGEN ENERGY LTD. Common Shares AMENDMENT NO. 2 TO EQUITY DISTRIBUTION AGREEMENT

Exhibit 99.2 NEXGEN ENERGY LTD. Common Shares AMENDMENT NO. 2 TO EQUITY DISTRIBUTION AGREEMENT April 30, 2024 Virtu Canada Corp. 1720 - 222 Bay Street Toronto, ON M5K 1B7 Virtu Americas, LLC 41st Floor - 1633 Broadway New York, NY 10019 United States Ladies and Gentlemen: NexGen Energy Ltd., a corporation governed by the Business Corporations Act (British Columbia) (the “Company”), entered into an

May 2, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 2, 2024 EX-99.1

NEXGEN ENERGY LTD. Common Shares AMENDMENT NO. 1 TO EQUITY DISTRIBUTION AGREEMENT

Exhibit 99.1 NEXGEN ENERGY LTD. Common Shares AMENDMENT NO. 1 TO EQUITY DISTRIBUTION AGREEMENT April 29, 2024 Virtu Canada Corp. 1720 - 222 Bay Street Toronto, ON M5K 1B7 Virtu Americas, LLC 41st Floor - 1633 Broadway New York, NY 10019 United States Ladies and Gentlemen: NexGen Energy Ltd., a corporation governed by the Business Corporations Act (British Columbia) (the “Company”), entered into an

May 1, 2024 EX-99.1

Form 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.1 Form 51-102F3 MATERIAL CHANGE REPORT Item 1 Name and Address of Company NexGen Energy Ltd. (the “Company”) Suite 3150, 1021 West Hastings Street Vancouver, BC V6E 0C3 Item 2 Date of Material Change April 30, 2024 Item 3 News Releases On April 30, 2024, the Company issued two news releases disclosing the material change through CNW (Canada NewsWire). Item 4 Summary of Material Change O

May 1, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

April 30, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

April 30, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

April 30, 2024 EX-99.1

NexGen Announces Upsized C$224 Million CDI Offering in Australia

Exhibit 99.1 NexGen Announces Upsized C$224 Million CDI Offering in Australia VANCOUVER, BC, April 30, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has entered into an amended and restated placement agreement dated April 30, 2024 (the "Placement Agreement") with a lead manager and bookrunner in Australia, Aitken Mount

April 30, 2024 EX-99.1

NexGen Announces C$180 Million CDI Offering in Australia

Exhibit 99.1 NexGen Announces C$180 Million CDI Offering in Australia VANCOUVER, BC, April 30, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has entered into a placement agreement dated April 30, 2024 (the "Placement Agreement") with a lead manager and bookrunner in Australia, Aitken Mount Capital Partners (the "Lead Ma

March 11, 2024 EX-99.1

NexGen Announces Discovery of New Intense Mineralization in Greenfields Discovery 3.5 Kilometers from Arrow

Exhibit 99.1 NexGen Announces Discovery of New Intense Mineralization in Greenfields Discovery 3.5 Kilometers from Arrow Vancouver, BC, March 11, 2024 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the discovery of new intense uranium mineralization on its 100% owned SW2 Property, 3.5 kilometers (km) east of NexGen’s world-class Arrow Depo

March 11, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-38072 Ne

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

March 7, 2024 EX-99.13

To: NexGen Energy Ltd.

Exhibit 99.13 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2023, I, Mark B. Mathisen, C.P.G., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to my name and to the inclusio

March 7, 2024 EX-99.5

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EX-99.5 EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Benjamin Salter, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in

March 7, 2024 EX-99.1

ANNUAL INFORMATION FORM FOR THE FINANCIAL YEAR ENDED DECEMBER 31, 2023 March 6, 2024

EX-99.1 Exhibit 99.1 ANNUAL INFORMATION FORM FOR THE FINANCIAL YEAR ENDED DECEMBER 31, 2023 March 6, 2024 Table of Contents ABOUT THIS ANNUAL INFORMATION FORM 3 ABOUT NEXGEN 5 GENERAL DEVELOPMENT OF THE BUSINESS 5 DESCRIPTION OF THE BUSINESS 11 DETAILS OF THE ROOK I PROJECT 12 RISK FACTORS 34 DIVIDENDS 40 DESCRIPTION OF CAPITAL STRUCTURE 40 MARKET FOR SECURITIES AND TRADING PRICE AND VOLUME 41 PRI

March 7, 2024 40-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 15(d) of the Securiti

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 40-F (Check One) ☐ Registration statement pursuant to Section 12 of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31 , 2023 Commission file number 001-38072 NexGen Energy Ltd. (Exact name of registrant as

March 7, 2024 EX-99.7

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EX-99.7 Exhibit 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Benjamin Salter, Chief Financial Officer of

March 7, 2024 EX-99.14

Code of Ethics NexGen’s Commitment

EX-99.14 Exhibit 99.14 Code of Ethics NexGen’s Commitment REPUTATION AND VALUES The reputation of NexGen Energy Ltd. (the “Corporation”) and all its affiliated entities, other than those controlled entities that have securities listed on a securities exchange and are subject to their own corporate governance standards and policies, (collectively, “NexGen”) is one of its most important assets. The

March 7, 2024 EX-97

INCENTIVE COMPENSATION RECOVERY POLICY

EX-97 Exhibit 97 INCENTIVE COMPENSATION RECOVERY POLICY 1.  INTRODUCTION The Board of Directors of NexGen Energy Ltd. (the “Company”) believes that it is in the best interests of the Company and its shareholders to create and maintain a culture that emphasizes integrity and accountability and that reinforces the Company’s compensation philosophy. The Board has therefore adopted this policy, which

March 7, 2024 EX-99.2

Management’s Discussion and Analysis For the year ended December 31, 2023 (expressed in thousands of Canadian dollars, except as noted)

EX-99.2 Exhibit 99.2 Management’s Discussion and Analysis For the year ended December 31, 2023 (expressed in thousands of Canadian dollars, except as noted) CONTENTS Cautionary Note Regarding Forward-Looking Information And Statements 3 Business Overview 4 2023 Highlights 5 Operations Outlook 12 Health, Safety, and Environment 13 Financial Results 13 Financial Position Summary 16 Liquidity and Cap

March 7, 2024 EX-99.11

To: NexGen Energy Ltd.

EX-99.11 Exhibit 99.11 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2023, I, Mark Hatton, P. Eng., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to my name and to the inc

March 7, 2024 EX-99.12

To: NexGen Energy Ltd.

Exhibit 99.12 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2023, I, Paul O’Hara, P.Eng., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-275839) (the “Registration Statement”), to my name and to the inclusion and

March 7, 2024 EX-99.4

CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

EX-99.4 EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Leigh R. Curyer, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in

March 7, 2024 EX-99.9

NexGen Energy Ltd

EX-99.9 Exhibit 99.9 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2023, I, Kevin Small, P.Eng., Senior Vice Presid

March 7, 2024 EX-99.6

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

EX-99.6 Exhibit 99.6 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Leigh R. Curyer, Chief Executive Officer of

March 7, 2024 EX-99.3

Consolidated Financial Statements December 31, 2023 and 2022 (expressed in thousands of Canadian dollars) The accompanying notes are an integral part of these consolidated financial statements.

Exhibit 99.3 Consolidated Financial Statements December 31, 2023 and 2022 (expressed in thousands of Canadian dollars) The accompanying notes are an integral part of these consolidated financial statements. Management’s Responsibility for Financial Reporting The accompanying audited consolidated financial statements, related note disclosures, and other financial information contained in the manage

March 7, 2024 EX-99.10

NexGen Energy Ltd

EX-99.10 Exhibit 99.10 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2023, I, Jason Craven, P.Geo., Exploration Man

March 7, 2024 EX-99.8

Consent of Independent Registered Public Accounting Firm

Exhibit 99.8 Consent of Independent Registered Public Accounting Firm The Board of Directors NexGen Energy Ltd. We consent to the use of: ● our report dated March 6, 2024 on the consolidated financial statements of NexGen Energy Ltd. (the “Entity”) which comprise the consolidated statements of financial position as at December 31, 2023 and December 31, 2022, the related consolidated statements of

February 9, 2024 EX-99.1

NexGen Initiates 30,000 Meter 2024 Uranium Exploration Program

Exhibit 99.1 NexGen Initiates 30,000 Meter 2024 Uranium Exploration Program VANCOUVER, BC, Feb. 7, 2024 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) announces the commencement of a 30,000-meter exploration drill program that will test priority targets on NexGen's 100% owned properties that dominate the boundary of the proven high-grade uranium district o

February 9, 2024 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2024 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

January 16, 2024 SC 13D/A

CA:NXE / NexGen Energy Ltd. / Li Ka Shing Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.3)* NexGen Energy Ltd. (Name of Issuer) Common Stock, no Par Value (Title of Class of Securities) 65340P106 (CUSIP Number of Class of Securities) Andrew J. Bond Sheppard Mullin Richter & Hampton LLP 1901 Avenue of the Stars, Suite 1600 Los Angeles, CA 90067-6

December 12, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2023 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant’s name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

December 12, 2023 SUPPL

PROSPECTUS SUPPLEMENT TO THE SHORT FORM BASE SHELF PROSPECTUS DATED DECEMBER 8, 2023 New Issue December 11, 2023 NEXGEN ENERGY LTD. Up to $500,000,000 of Common Shares

Table of Contents Filed pursuant to General Instruction II.L. of Form F-10; File No. 333-275839 No securities regulatory authority has expressed an opinion about these securities and it is an offence to claim otherwise. This prospectus supplement (this “Prospectus Supplement”), together with the accompanying short form base shelf prospectus dated December 8, 2023, (the “Prospectus”) to which it re

December 12, 2023 EX-99.2

NexGen Updates At-the-Market Equity Program

Exhibit 99.2 NexGen Updates At-the-Market Equity Program Vancouver, BC, December 11, 2023 - NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX: NXE) (NYSE: NXE) (ASX: NXG) announced today that it has updated its at-the-market equity program (the “ATM Program”) to offer and sell up to C$500 million of common shares from treasury (“Common Shares”). Sales of Common Shares, if any, will be made pursu

December 12, 2023 EX-99.1

NEXGEN ENERGY LTD. Common Shares EQUITY DISTRIBUTION AGREEMENT

Exhibit 99.1 NEXGEN ENERGY LTD. Common Shares EQUITY DISTRIBUTION AGREEMENT December 11, 2023 Virtu ITG Canada Corp. 1720 - 222 Bay Street Toronto, ON M5K 1B7 Virtu Americas, LLC 41st Floor – 1633 Broadway New York, NY 10019 United States Ladies and Gentlemen: NexGen Energy Ltd., a corporation governed by the Business Corporations Act (British Columbia) (the “Company”), confirms its agreement (thi

December 8, 2023 F-10/A

As filed with the Securities and Exchange Commission on December 8, 2023

F-10/A Table of Contents As filed with the Securities and Exchange Commission on December 8, 2023 Registration No.

December 1, 2023 F-X

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM F-X APPOINTMENT OF AGENT FOR SERVICE OF PROCESS AND UNDERTAKING A. Name of issuer or person filing (“Filer”): NexGen Energy Ltd. B. (1) This is (check one): ☒ An original filing for the Filer. ☐ An amended filing for the Filer. (2) Check the following box if you are filing the Form F-X in paper in accordance with Regulati

December 1, 2023 EX-FILING FEES

Calculation of Filing Fee Tables FORM F-10 (Form Type) NEXGEN ENERGY LTD. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title(1)(2) Fee Calculation or Carry

Exhibit 107 EX-FILING FEES Calculation of Filing Fee Tables FORM F-10 (Form Type) NEXGEN ENERGY LTD.

December 1, 2023 F-10

As filed with the Securities and Exchange Commission on December 1, 2023

Table of Contents As filed with the Securities and Exchange Commission on December 1, 2023 Registration No.

December 1, 2023 EX-5.6

CONSENT OF QUALIFIED PERSON

EX-5.6 Exhibit 5.6 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 CONSENT OF QUALIFIED PERSON I, Jason Craven, P.Geo, Exploration Manager for NexGen Energy Ltd., consent to the use of and reference to my name, and the inclusion and incorporat

December 1, 2023 EX-5.4

CONSENT OF QUALIFIED PERSON

EX-5.4 Exhibit 5.4 CONSENT OF QUALIFIED PERSON To: NexGen Energy Ltd. In connection with the Registration Statement on Form F-10 of NexGen Energy Ltd. (the “Registration Statement”), I, Mark Hatton, P.Eng., hereby consent to the references in the Registration Statement to my name and to the inclusion or incorporation by reference in the Registration Statement of extracts from or summaries of secti

December 1, 2023 EX-5.3

CONSENT OF QUALIFIED PERSON

EX-5.3 Exhibit 5.3 CONSENT OF QUALIFIED PERSON To: NexGen Energy Ltd. In connection with the Registration Statement on Form F-10 of NexGen Energy Ltd. (the “Registration Statement”), I, Mark B. Mathisen, C.P.G., hereby consent to the references in the Registration Statement to my name and to the inclusion or incorporation by reference in the Registration Statement of extracts from or summaries of

December 1, 2023 EX-5.5

CONSENT OF QUALIFIED PERSON

EX-5.5 Exhibit 5.5 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 CONSENT OF QUALIFIED PERSON I, Kevin Small, P.Eng., Senior Vice President of Operations and Engineering for NexGen Energy Ltd., consent to the use of and reference to my name,

December 1, 2023 EX-7.1

NEXGEN ENERGY LTD. as Issuer [ ] as U.S. Trustee [ ] as Canadian Trustee Dated as of [ ]

Exhibit 7.1 NEXGEN ENERGY LTD. as Issuer and [ ] as U.S. Trustee and [ ] as Canadian Trustee Indenture Dated as of [ ] TABLE OF CONTENTS ARTICLE ONE DEFINITIONS AND OTHER PROVISIONS OF GENERAL APPLICATION 1 SECTION 1.01 Definitions 1 SECTION 1.02 Rules of Construction 10 SECTION 1.03 Compliance Certificates and Opinions 10 SECTION 1.04 Form of Documents Delivered to Trustees 11 SECTION 1.05 Acts o

November 20, 2023 EX-99.1

NexGen Energy to Host Q3 Conference Call on Rook I Project Developments

Exhibit 99.1 NexGen Energy to Host Q3 Conference Call on Rook I Project Developments VANCOUVER, BC, Nov. 20, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it will be hosting its third quarter conference call on Wednesday, November 22, 2023, at 10:00 am Eastern Standard Time. During the call, NexGen's President and Chief Ex

November 20, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 9, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 9, 2023 EX-99.1

NexGen Receives Provincial Environmental Assessment Approval for the Rook I Project

NexGen Receives Provincial Environmental Assessment Approval for the Rook I Project Vancouver, BC, November 9, 2023 - NexGen Energy Ltd.

November 3, 2023 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended September 30, 2023. 2. No misrepresentations: Based on my knowl

November 3, 2023 EX-99.1

Condensed Interim Consolidated Financial Statements For the three and nine months ended September 30, 2023 (expressed in thousands of Canadian dollars) - Unaudited

Exhibit 99.1 Condensed Interim Consolidated Financial Statements For the three and nine months ended September 30, 2023 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited As at September 30, 2023 As at December 31, 2022 Assets Current assets Cash $ 370,4

November 3, 2023 EX-99.2

Management’s Discussion and Analysis For the three and nine months ended September 30, 2023 (expressed in thousands of Canadian dollars, except as noted)

Exhibit 99.2 Management’s Discussion and Analysis For the three and nine months ended September 30, 2023 (expressed in thousands of Canadian dollars, except as noted) Contents Cautionary Note Regarding Forward-Looking Information 3 Business Overview 4 Q3 2023 and Year To Date 2023 Highlights 5 Operations Outlook 11 Health, Safety, and Environment 11 Financial Results 12 Financial Position Summary

November 3, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address o

November 3, 2023 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended September 30, 2023. 2. No misrepresentations: Based on my kn

September 29, 2023 SC 13D/A

CA:NXE / NexGen Energy Ltd / Li Ka Shing Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.2)* NexGen Energy Ltd. (Name of Issuer) Common Stock, no Par Value (Title of Class of Securities) 65340P106 (CUSIP Number of Class of Securities) Andrew J. Bond Sheppard Mullin Richter & Hampton LLP 1901 Avenue of the Stars, Suite 1600 Los Angeles, CA 90067-6

September 25, 2023 EX-99.3

Article 1 INTERPRETATION

Exhibit 99.3 THIS INVESTOR RIGHTS AGREEMENT is made as of the 22nd day of September, 2023. BETWEEN: NexGEN ENERGY LTD. a corporation existing under the laws of the Province of British Columbia (the “Company”) - and - WASHINGTON H. SOUL PATTINSON AND COMPANY LIMITED (ACN 000 002 728) a corporation existing under the laws of the Commonwealth of Australia (the “Investor”) WHEREAS the Company has ente

September 25, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address

September 25, 2023 EX-99.4

NEXGEN ENERGY LTD. Computershare Trust Company of canada TRUST INDENTURE Providing for the Issue of 9.0% 2023 Unsecured Convertible Debentures September 22, 2023

Exhibit 99.4 NEXGEN ENERGY LTD. AND Computershare Trust Company of canada TRUST INDENTURE Providing for the Issue of 9.0% 2023 Unsecured Convertible Debentures September 22, 2023 TABLE OF CONTENTS ARTICLE 1 INTERPRETATION - 1 - 1.1 Definitions - 1 - 1.2 Meaning of “Outstanding” - 8 - 1.3 Interpretation - 9 - 1.4 Headings, Etc. - 9 - 1.5 Time of Essence - 9 - 1.6 Day not a Business Day - 10 - 1.7 A

September 25, 2023 EX-99.1

NexGen Closes US$110 Million Strategic Convertible Debenture Financing

Exhibit 99.1 NexGen Closes US$110 Million Strategic Convertible Debenture Financing Vancouver, BC, September 22, 2023 - NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has closed its previously announced non-brokered private placement (the “Offering”) of US$110 million aggregate principal amount of unsecured convertible debentures (th

September 25, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address

September 25, 2023 EX-99.2

Article 1 INTERPRETATION

Exhibit 99.2 THIS AMENDED AND RESTATED INVESTOR RIGHTS AGREEMENT is made as of the 22nd day of September, 2023. BETWEEN: NexGEN ENERGY LTD. a corporation existing under the laws of the Province of British Columbia (the “Company”) - and - QUEEN’S ROAD CAPITAL INVESTMENT LTD. a corporation existing under the laws of the Cayman Islands (the “Investor”) WHEREAS the Company entered into an investor rig

September 25, 2023 EX-99.5

Form 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.5 Form 51-102F3 MATERIAL CHANGE REPORT Item 1 Name and Address of Company NexGen Energy Ltd. (the “Company”) Suite 3150, 1021 West Hastings Street Vancouver, BC V6E 0C3 Item 2 Date of Material Change September 22, 2023 Item 3 News Release On September 22, 2023, the Company issued a news release disclosing the material change through CNW (Canada NewsWire). Item 4 Summary of Material Chan

September 25, 2023 EX-99.1

SHAREHOLDER RIGHTS PLAN April 24, 2023 NEXGEN ENERGY LTD. COMPUTERSHARE INVESTOR SERVICES INC. as Rights Agent

Exhibit 99.1 SHAREHOLDER RIGHTS PLAN April 24, 2023 between NEXGEN ENERGY LTD. and COMPUTERSHARE INVESTOR SERVICES INC. as Rights Agent Table of Contents Page ARTICLE 1 INTERPRETATION 1.1 Certain Definitions 5 1.2 Holder 16 1.3 Acting Jointly or in Concert 16 1.4 Application of Statutes, Regulations and Rules 16 1.5 Currency 16 1.6 Headings and References 17 1.7 Singular, Plural, etc 17 1.8 Genera

September 1, 2023 EX-99.2

Form 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.2 Form 51-102F3 MATERIAL CHANGE REPORT Item 1 Name and Address of Company NexGen Energy Ltd. (the “Corporation” or “NexGen”) Suite 3150, 1021 West Hastings Street Vancouver, BC V6E 0C3 Item 2 Date of Material Change August 31, 2023 Item 3 News Release On August 31, 2023, the Corporation issued a news release reporting the material change through CNW (Canada NewsWire). Item 4 Summary of

September 1, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

September 1, 2023 EX-99.1

NexGen Announces US$110 Million Convertible Debenture Financing and Strategic Purchase of Common Shares

Exhibit 99.1 NexGen Announces US$110 Million Convertible Debenture Financing and Strategic Purchase of Common Shares Vancouver, BC, August 31, 2023 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has entered into binding term sheets with Queen’s Road Capital Investment Ltd. (“QRC”) and Washington H Soul Pattinson and Company Limited

August 29, 2023 EX-99.1

NexGen Announces the Appointment of Ben Salter as Chief Financial Officer & Tracy Primeau as Special Advisor

Exhibit 99.1 NexGen Announces the Appointment of Ben Salter as Chief Financial Officer & Tracy Primeau as Special Advisor Vancouver, BC, August 29, 2023 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the appointment of Ben Salter as Chief Financial Officer (“CFO”), effective September 1, 2023. Mr. Salter commenced with NexGen in June 2021

August 29, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 21, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 21, 2023 EX-99.1

NexGen Announces the Completion of the Provincial Environmental Assessment Technical Review and Submission of the Final Environmental Impact Statement

Exhibit 99.1 NexGen Announces the Completion of the Provincial Environmental Assessment Technical Review and Submission of the Final Environmental Impact Statement VANCOUVER, BC, Aug. 21, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce a major milestone in the advancement of regulatory approvals for the 100% owned Rook I Project

August 9, 2023 EX-99.1

Condensed Interim Consolidated Financial Statements For the three and six months ended June 30, 2023 (expressed in thousands of Canadian dollars) - Unaudited

Exhibit 99.1 Condensed Interim Consolidated Financial Statements For the three and six months ended June 30, 2023 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited As at June 30, 2023 As at December 31, 2022 Assets Current assets Cash $ 100,571 $ 134,44

August 9, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 N

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

August 9, 2023 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended June 30, 2023. 2. No misrepresentations: Based on my knowledge,

August 9, 2023 EX-99.2

Management’s Discussion and Analysis For the three and six months ended June 30, 2023 (expressed in thousands of Canadian dollars, except as noted)

Exhibit 99.2 Management’s Discussion and Analysis For the three and six months ended June 30, 2023 (expressed in thousands of Canadian dollars, except as noted) Contents Cautionary Note Regarding Forward-Looking Information 4 Business Overview 5 Q2 2023 and Year To Date 2023 Highlights 5 Operations Outlook 11 Health, Safety, and Environment 11 Financial Results 12 Financial Position Summary 14 Liq

August 9, 2023 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Benjamin Salter, Acting Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended June 30, 2023. 2. No misrepresentations: Based on my

August 3, 2023 EX-99.1

NexGen to Host 2023 Second Quarter Results and Conference Call

Exhibit 99.1 NexGen to Host 2023 Second Quarter Results and Conference Call VANCOUVER, BC, Aug. 3, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE MKT: NXE) (ASX: NXG) is pleased to announce the release of its second quarter 2023 Financial Statements and Management Discussion & Analysis before market open on Wednesday, August 9, 2023. NexGen will host its 2023 Second Q

August 3, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of

June 16, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 16, 2023 EX-99.2

June 16, 2023

Exhibit 99.2 June 16, 2023 VIA SEDAR The Canadian Securities Administrators in each province and territory The Toronto Stock Exchange NexGen Energy Ltd. - Report of Voting Results Pursuant to Section 11.3 of National Instrument 51-102 - Continuous Disclosure Obligations, this report briefly describes the matters voted upon and the outcome of the votes at the 2023 Annual General and Special Meeting

June 16, 2023 EX-99.1

NexGen Announces Voting Results from its 2023 Annual Meeting of Shareholders

Exhibit 99.1 NexGen Announces Voting Results from its 2023 Annual Meeting of Shareholders VANCOUVER, BC, June 16, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the voting results from its Annual General and Special Meeting of Shareholders ("Meeting"), held on June 15, 2023. Shareholders voted in favour of all matters of busines

June 15, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 15, 2023 EX-99.1

NexGen Signs Industry-Leading Impact Benefit Agreement with the Métis Nation - Saskatchewan Northern Region 2 and the Métis Nation - Saskatchewan.

Exhibit 99.1 NexGen Signs Industry-Leading Impact Benefit Agreement with the Métis Nation - Saskatchewan Northern Region 2 and the Métis Nation - Saskatchewan. This is a designated news release. VANCOUVER, BC, June 15, 2023 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the signing of an Impact Benefit Agreement ("IBA" or the “Agreement”)

June 12, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pr

June 12, 2023 EX-99.1

NexGen Summer Drilling Commences - 17,000m

Exhibit 99.1 NexGen Summer Drilling Commences - 17,000m VANCOUVER, BC, June 12, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce commencement of the summer exploration drill program comprised of 17,000 metres on its 100% owned SW2 and SW1 properties in the southwest Athabasca Basin, Saskatchewan. Geophysical surveys and historical

May 11, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 11, 2023 EX-99.1

NexGen Announces Provincial Approval and Commencement of 2023 Site Infrastructure and Confirmation Program: Enhancing Safety and Creating Jobs for Local Communities

Exhibit 99.1 NexGen Announces Provincial Approval and Commencement of 2023 Site Infrastructure and Confirmation Program: Enhancing Safety and Creating Jobs for Local Communities VANCOUVER, BC, May 11, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the Saskatchewan Ministry of Environment has approved the commencement of the 2023

May 8, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

6-K 1 nexgen6k.htm FORM 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Ca

May 8, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 8, 2023 EX-99.1

Your vote is important - please vote today.

EX-99.1 2 ex991.htm NEWS RELEASE DATED MAY 8, 2023 Exhibit 99.1 NexGen Files Management Information Circular in Connection with Annual General and Special Meeting of Shareholders VANCOUVER, BC, May 8, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE MKT: NXE) (ASX: NXG) is pleased to announce it has mailed a Notice of Meeting and Management Information Circular to share

May 8, 2023 EX-99.3

Form of Proxy

Exhibit 99.3

May 8, 2023 EX-99.2

ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS

Exhibit 99.2 ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE AND ACCESS NOTIFICATION TO SHAREHOLDERS NexGen Energy Ltd. ("NexGen") has chosen to use the notice and access model for delivery of meeting materials to its shareholders. Under notice and access, shareholders still receive a proxy or voting instruction form enabling them to vote at the shareholders' meeting. However, instead of

May 8, 2023 EX-99.4

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

Exhibit 99.4 NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS WHEN: WHERE Thursday, June 15, 2023 2.00 p.m. (Pacific time) The Offices of NexGen Energy Ltd. Suite 3150 - 1021 West Hasting Street Vancouver, BC, V6E 0C3 Shareholders will also be able to access but not participate in the formal aspect of the Meeting by webcast or teleconference using the details below: WEBCAST URL: https:

May 8, 2023 EX-99.1

NOTICE OF ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

Exhibit 99.1 Message from the Chairman of the Board chris mcfadden Dear Fellow Shareholders, You are invited to attend the Annual General and Special Meeting of Shareholders (the “Meeting”) of NexGen Energy Ltd. (“NexGen” or the “Company”), which will be held on June 15, 2023, at 2:00 p.m. (Pacific Time) at the offices of NexGen located at 1021 West Hastings Street, Suite 3150, Vancouver, British

May 4, 2023 EX-99.1

Condensed Interim Consolidated Financial Statements For the three months ended March 31, 2023 (expressed in thousands of Canadian dollars) - Unaudited

Exhibit 99.1 Condensed Interim Consolidated Financial Statements For the three months ended March 31, 2023 (expressed in thousands of Canadian dollars) - Unaudited NexGen Energy Ltd. Condensed Interim Consolidated Statements of Financial Position (expressed in thousands of Canadian Dollars) - Unaudited As at March 31, 2023 As at December 31, 2022 Assets Current assets Cash $ 135,909 $ 134,447 Mark

May 4, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

6-K 1 nexgen6k.htm FORM 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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Ca

May 4, 2023 EX-99.2

Management’s Discussion and Analysis For the three months ended March 31, 2023 (expressed in thousands of Canadian dollars, except as noted)

Exhibit 99.2 Management’s Discussion and Analysis For the three months ended March 31, 2023 (expressed in thousands of Canadian dollars, except as noted) CONTENTS Cautionary Note Regarding Forward-Looking Information 4 Business Overview 5 Q1 2023 Highlights 5 Operations Review - Rook I Project 6 Operations Outlook 10 Health, Safety and Environment 10 Financial Results 11 Financial Position Summary

May 4, 2023 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Harpreet Dhaliwal, Chief Financial Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended March 31, 2023. 2. No misrepresentations: Based on my know

May 4, 2023 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Leigh Curyer, Chief Executive Officer of NexGen Energy Ltd., certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of NexGen Energy Ltd. (the “issuer”) for the interim period ended March 31, 2023. 2. No misrepresentations: Based on my knowledge

May 1, 2023 EX-99.1

NexGen to Host First Quarter 2023 Company Update and Results Conference Call on May 4, 2023

Exhibit 99.1 NexGen to Host First Quarter 2023 Company Update and Results Conference Call on May 4, 2023 VANCOUVER, BC, May 1, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the release of its 2023 Q1 Financial Statements and Management Discussion & Analysis before market open on Thursday, May 4, 2023. Given the advanced stage o

May 1, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

May 1, 2023 EX-99.1

NexGen Receives Strong Support for Rook I Project Financing in Excess of US$1 Billion

Exhibit 99.1 NexGen Receives Strong Support for Rook I Project Financing in Excess of US$1 Billion Vancouver, BC, May 1, 2023 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce that it has received significant initial interest from prospective financial institutions, including commercial lenders and export credit agencies, for providing projec

May 1, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of pri

April 26, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

April 26, 2023 EX-99.1

NexGen Releases 2022 Sustainability Report

Exhibit 99.1 NexGen Releases 2022 Sustainability Report VANCOUVER, BC, April 26, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) is pleased to announce the release of its 2022 Sustainability Report ("the Report") that covers the period January 1 to December 31, 2022. The Report marks the third year that NexGen has reported on the Company's robust Envir

April 18, 2023 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 OF THE SECURITIES EXCHANGE ACT OF 1934

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 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2023 Commission File Number 001-38072 NexGen Energy Ltd. (Translation of registrant's name into English) Suite 3150, 1021 - West Hastings Street Vancouver, B.C., Canada V6E 0C3 (Address of p

April 18, 2023 EX-99.1

NexGen Energy, in Partnership with Clearwater River Dene Nation, Launches Member-Owned Business Slated to Create More than $36M in Revenue in its First Three Years

Exhibit 99.1 NexGen Energy, in Partnership with Clearwater River Dene Nation, Launches Member-Owned Business Slated to Create More than $36M in Revenue in its First Three Years VANCOUVER, BC, April 18, 2023 /CNW/ - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) in partnership with the Clearwater River Dene Nation ("CRDN") is pleased to announce the establishment o

March 16, 2023 SC 13G/A

CA:NXE / NexGen Energy Ltd / Queen's Road Capital Investment Ltd. - AMENDMENT NO. 1 TO SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 ) NexGen Energy Ltd. (Name of Issuer) Common Shares (Title of Class of Securities) 65340P106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed

February 24, 2023 EX-99.14

Code of Ethics

EX-99.14 Exhibit 99.14 Code of Ethics NexGen’s Commitment REPUTATION AND VALUES The reputation of NexGen Energy Ltd. (the “Corporation”) and all its affiliated entities, other than those controlled entities that have securities listed on a securities exchange and are subject to their own corporate governance standards and policies, (collectively, “NexGen”) is one of its most important assets. The

February 24, 2023 EX-99.5

Certification of Chief Financial Officer pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934

EXHIBIT 99.5 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Harpreet Dhaliwal, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light

February 24, 2023 EX-99.7

Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350

Exhibit 99.7 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of NexGen Energy Ltd. (the “Company”) on Form 40-F for the year ended December 31, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Harpreet Dhaliwal, Chief Financial Officer of the C

February 24, 2023 EX-99.10

Consent of Jason Craven, P. Geo.

EX-99.10 Exhibit 99.10 NexGen Energy Ltd. Head Office 3150 – 1021 West Hastings Street Vancouver, BC, V6E 0C3 Tel: 604.428.4112 Fax: 604.259.0321 Saskatoon Office Suite 200, 475-2nd Ave S Saskatoon SK, S7K 1P4 Tel: 306 954 2275 In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2022, I, Jason Craven, P.Geo., Exploration Man

February 24, 2023 EX-99.4

Certification of Chief Executive Officer pursuant to Rule 13a-14 or 15d-14 of the Securities Exchange Act of 1934

EX-99.4 EXHIBIT 99.4 CERTIFICATION REQUIRED BY RULE 13a-14(a) OR RULE 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934 I, Leigh R. Curyer, certify that: 1. I have reviewed this annual report on Form 40-F of NexGen Energy Ltd.; 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in

February 24, 2023 EX-99.11

Consent of Mark Hatton

Exhibit 99.11 To: NexGen Energy Ltd. In connection with the Annual Report on Form 40-F of NexGen Energy Ltd. (the “Annual Report”) for the year ended December 31, 2022, I, Mark Hatton, P. Eng., hereby consent to the references in the Annual Report and in NexGen Energy Ltd.’s Registration Statement on Form F-10 (File No. 333-266575) (the “Registration Statement”), to my name and to the inclusion an

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