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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1. Name and Address of Reporting Person * Twelve Seas Sponsor LLC 2. Issuer Name and Ticker or Trading Symbol Twelve Seas Investment Co III/Cayman [TWLV] 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) 2685 NOTTINGHAM AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 12/15/2025 (Street) LOS ANGELES, CA 90027 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 Class A Ordinary Shares(1) 12/15/2025 12/15/2025 P 300,000(1) A $10 300,000(1) I(2) See footnote(2)

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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

Rights to receive Class A ordinary shares

(3)

12/15/2025

P

300,000(3)

(3)

(3)

Class A ordinary shares

30,000(3)

(3)

5,992,500(4)

D(3)

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Twelve Seas Sponsor LLC 2685 NOTTINGHAM AVENUE LOS ANGELES, CA 90027		X
Elkin Dimitri 2685 NOTTINGHAM AVENUE LOS ANGELES, CA 90027	X	X	Chief Executive Officer

Signatures

/s/ Dimitri Elkin, as managing member of Twelve Seas Holdings LLC, the managing member of Twelve Seas Sponsor LLC		12/15/2025
**Signature of Reporting Person		Date
/s/ Dimitri Elkin		12/15/2025
**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)	Reflects the 300,000 Class A ordinary shares of Twelve Seas Investment Company III (the "Issuer") that are included in the 300,000 private placement units of the Issuer purchased by Twelve Seas Sponsor LLC ("Sponsor") on December 15, 2025. Each private placement unit was purchased for $10 per unit and consists of one Class A ordinary share and one right to receive one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination, as described in the registration statement on Form S-1 (File No. 333-286408).
(2)	Twelve Seas Sponsor LLC is the record holder of such shares. Dimitri Elkin, one of our directors and Chief Executive Officer, is the managing member of Twelve Seas Holdings LLC, the managing member of Twelve Seas Sponsor LLC and holds sole voting and investment discretion with respect to the ordinary shares held of record by the sponsor. Mr. Elkin disclaims any beneficial ownership of the securities held by the sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
(3)	Represents the 30,000 Class A ordinary shares, which may be acquired by Sponsor upon the conversion of 300,000 rights (included in the Sponsor's private placement units) upon consummation of the registrant's initial business combination. As described in the Registration Statement under the heading "Description of Securities-Share Rights," each right will automatically convert into one-tenth (1/10) of one Class A ordinary share upon consummation of the Issuer's initial business combination, subject to certain adjustments described therein and have no expiration date. No fractional Class A ordinary shares will be issued upon conversion of such rights.
(4)	Represents (i) the 300,000 rights referred to in footnotes 1 and 3 and (ii) 5,692,500 Class B ordinary shares held by the Sponsor acquired pursuant to a subscription agreement by and between the Issuer and the Sponsor.

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