Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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

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(Print or Type Responses)

1. Name and Address of Reporting Person * Climate Transition Special Opportunities SPAC I LP 2. Issuer Name and Ticker or Trading Symbol Energy Transition Special Opportunities [ETSS] 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) C/O ENERGY TRANSITION SPECIAL, OPPORTUNITIES 71 ORCHARD PL, UNIT 1 3. Date of Earliest Transaction (Month/Day/Year) 05/18/2026 (Street) GREENWICH, CT 06830 4. If Amendment, Date Original Filed (Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Warrants(1)

$11.50

05/18/2026

P

3,500,000

(3)

(4)

Class A Ordinary Shares

3,500,000

(1)

3,500,000

D(2)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Climate Transition Special Opportunities SPAC I LP C/O ENERGY TRANSITION SPECIAL OPPORTUNITIES 71 ORCHARD PL, UNIT 1 GREENWICH, CT 06830		X
ZULKOSKI ROBERT JOSEPH C/O ENERGY TRANSITION SPECIAL OPPORTUNITIES 71 ORCHARD PL, UNIT 1 GREENWICH, CT 06830	X	X	Chief Executive Officer

Signatures

/s/ Tricia Branker, Attorney-in-Fact		05/20/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Simultaneously with the consummation of the Issuer's initial public offering, Climate Transition Special Opportunities SPAC I LP (the "Sponsor") acquired, at a price of $1.00 per warrant, 3,500,000 (the "Private Placement Warrants") in a private placement for an aggregate purchase price of $3,500,000. Each whole private placement warrant is exercisable to purchase one Class A ordinary share at a price of $11.50 per share, subject to adjustment, terms and limitations, as described in the Registration Statement on Form S-1 (File No. 333-290458) related to the Issuer's initial public offering.
(2)	The general partner of our sponsor is Climate Transition Special Opportunities SPAC I GP LLC, which is controlled indirectly by Robert Zulkoski. Accordingly, Mr. Zulkoski may be deemed to have beneficial ownership of the Class B ordinary shares held directly by our sponsor. Mr. Zulkoski disclaims such beneficial ownership other than to the extent of his pecuniary interest.
(3)	The Private Placement Warrants will become exercisable at any time commencing 30 days after the completion of the Company's initial business combination.
(4)	The Private Placement Warrants will expire five years after the completion of the Company's initial business combination, at 5:00 p.m., New York City time, or earlier upon redemption or liquidation.

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