Sec Form 4 Filing - Spring Valley Acquisition Sponsor II, LLC @ Eagle Nuclear Energy Corp. - 2026-04-24

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Spring Valley Acquisition Sponsor II, LLC 2. Issuer Name and Ticker or Trading Symbol Eagle Nuclear Energy Corp. [ NUCL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 4030 MAPLE AVENUE, SUITE 500 3. Date of Earliest Transaction (MM/DD/YY) 04/24/2026 (Street) DALLAS, TX75219 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/24/2026 J( 1 ) 695,810 D 1,712,525 D ( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Private Warrant $ 11.5 04/24/2026 J( 1 ) 2,722,216 03/26/2026 02/24/2031 Common Stock 2,722,216 ( 1 ) 6,699,917 ( 3 ) D ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Spring Valley Acquisition Sponsor II, LLC 4030 MAPLE AVENUE, SUITE 500 DALLAS, TX75219 X Sorrells Christopher Dixon 4030 MAPLE AVENUE, SUITE 500 DALLAS, TX75219 X Signatures Spring Valley Acquisition Sponsor II, LLC, By: /s/ Christopher Sorrells Name: Christopher Sorrells Title: Manager 04/28/2026 Signature of Reporting Person Date /s/ Christopher Sorrells 04/28/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On April 24, 2026, Spring Valley Acquisition Sponsor II, LLC (the "Sponsor") transferred all of its 2,408,335 shares of common stock and 9,422,133 warrants (the "Securities") of Eagle Nuclear Energy Corp. (the "Issuer") to its members for no consideration. Supercycle Holdings LLC ("Supercycle") received 1,712,525 shares and 6,699,917 warrants. ( 2 )The reported Securities were held directly by the Sponsor and are now held directly by Supercycle. The Sponsor and Supercycle are controlled by Mr. Christopher Sorrells. Accordingly, all of the securities held by the Sponsor and Supercycle may be deemed to be beneficially held by Mr. Sorrells. Each reporting person under this Form 4 disclaims beneficial ownership of the reported securities except to the extent of their respective pecuniary interest therein and the filing of this Form 4 shall not be construed as an admission that any such reporting person is the beneficial owner of any such securities. ( 3 )Supercycle elected to limit the number of shares of common stock that may be issued to a specified threshold of 9.8% of the issued and outstanding shares of common stock (the "Blocker"). As a result of the Blocker, as of the date hereof, any attempted exercise by Supercycle of warrants in excess of the specified threshold will not be effected.

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