Twelve Seas Sponsor LLC - 15 Dec 2025 SCHEDULE 13D Report for Twelve Seas Investment Co III/Cayman Class A Ordinary Shares, $0.0001 par value

Filing manager: Twelve Seas Sponsor LLC
Reporting owner: Twelve Seas Sponsor LLC
Security: Twelve Seas Investment Co III/Cayman Class A Ordinary Shares, $0.0001 par value
Beneficially owned shares: 5,992,500 shares
Large-stake signal: Form
SCHEDULE 13D
Active or control-oriented beneficial ownership filing.
Ownership
26%
Beneficial ownership of this reported class.
Shares
5,992,500 shares
Shares beneficially owned as disclosed.
Event date
15 Dec 2025
Date tied to the ownership event or amendment.
Accepted by SEC
22 Dec 2025
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Class ownership: 26%
Shares outstanding: 23,408,203 shares
SEC form: SCHEDULE 13D
Accepted by SEC: 22 Dec 2025, 11:32:16 UTC
Event date: 15 Dec 2025
Source filing: View source filing

Key filing fact

Twelve Seas Sponsor LLC disclosed 26% ownership in Twelve Seas Investment Co III/Cayman Class A Ordinary Shares, $0.0001 par value on 15 Dec 2025.

Key facts

Twelve Seas Sponsor LLC filed SCHEDULE 13D for Twelve Seas Investment Co III/Cayman Class A Ordinary Shares, $0.0001 par value.
Disclosed ownership: 26%.
Date of event: 15 Dec 2025.

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
Twelve Seas Sponsor LLC	26%	5,992,500	5,992,500	0	/s/ Dimitri Elkin	Dimitri Elkin as mgn. mbr. of Twelve Seas Holdings LLC, the mgn. mbr. of Twelve Seas Sponsor LLC	0002096061
Twelve Seas Holdings LLC	26%	5,992,500	0	5,992,500	/s/ Dimitri Elkin	Dimitri Elkin, as managing member
Dimitri Elkin	26%	5,992,500	0	5,992,500	/s/ Dimitri Elkin	Dimitri Elkin

CIK / CUSIP context first

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