Twelve Seas Sponsor LLC - 15 Dec 2025 Form 4 Insider Report for Twelve Seas Investment Co III/Cayman

Reporting relationship: 10%+ Owner
Issuer ticker: TWLV, TWLVR, TWLVU on Nasdaq
Reported as of: 15 Dec 2025
Net transaction value: +$3,000,000
SEC form: 4
Accepted by SEC: 15 Dec 2025, 16:00:30 UTC
Prior SEC filing: 11 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Dimitri Elkin, as managing member of Twelve Seas Holdings LLC, the managing member of Twelve Seas Sponsor LLC

Key filing fact

Twelve Seas Sponsor LLC filed Form 4 for Twelve Seas Investment Co III/Cayman on 15 Dec 2025.

Key facts

This page summarizes Twelve Seas Sponsor LLC's Form 4 filing for Twelve Seas Investment Co III/Cayman.
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 15 Dec 2025, 16:00.

Change

Previous filing in this sequence was filed on 11 Dec 2025.
Current net transaction value: +$3,000,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0002096061 Primary reporting owner

Twelve Seas Sponsor LLC

Relationship: 10%+ Owner
Address: 2685 NOTTINGHAM AVENUE, LOS ANGELES
Signature: /s/ Dimitri Elkin, as managing member of Twelve Seas Holdings LLC, the managing member of Twelve Seas Sponsor LLC
Signature date: 15 Dec 2025

CIK 0001744019

Elkin Dimitri

Relationship: Chief Executive Officer, Director, 10%+ Owner
Address: 2685 NOTTINGHAM AVENUE, LOS ANGELES
Signature: /s/ Dimitri Elkin
Signature date: 15 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

TWLV transaction

Class A Ordinary Shares

Purchase

Transaction value: $3,000,000
Shares: +300,000
Change %
Price: $10.00
Shares after: 300,000
Date: 15 Dec 2025
Ownership: See footnote
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

TWLV transaction Derivative

Rights to receive Class A ordinary shares

Purchase

Transaction value
Shares: +300,000
Change %: +5.3%
Price
Shares after: 5,992,500
Date: 15 Dec 2025
Ownership: Direct
Underlying class: Class A ordinary shares
Underlying amount: 30,000
Exercise price
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

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).

Footnote F2

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.

Footnote F3

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.

Footnote F4

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.