As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Twelve Seas Investment Co III. The largest reported stake is Twelve Seas Sponsor LLC's, at 25.6%. 4 filings are on record since December 19, 2025 (Schedule 13D, December 22, 2025).
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Key facts
- · Holder: Adage Capital Management, L.P. · Percent: 7.61% · SCHEDULE 13G
- · Holder: Twelve Seas Sponsor LLC · Percent: 25.6% · SCHEDULE 13D
- · Holder: Linden Advisors LP · Percent: 5.1% · SCHEDULE 13G
- · Holder: Tenor Capital Management Company, L.P. · Percent: 5.2% · SCHEDULE 13G
Twelve Seas Investment Co III has 4 Schedule 13D or 13G filings on record since 2025-12-19. 4 holders' latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Twelve Seas Sponsor LLC | 25.6% | 5,992,500 | SCHEDULE 13D, 2025-12-22 | 2025-12-15 |
| Adage Capital Management, L.P. | 7.61% | 1,350,000 | SCHEDULE 13G, 2026-02-12 | 2025-12-31 |
| Tenor Capital Management Company, L.P. | 5.2% | 800,000 | SCHEDULE 13G, 2025-12-19 | 2025-12-12 |
| Linden Advisors LP | 5.1% | 900,000 | SCHEDULE 13G, 2025-12-19 | 2025-12-15 |
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More on Twelve Seas Investment Co III and the records around it.
Companies that share a holder
- Tenor Capital Management Company, L.P. also filed stake reports on 41 other companies: Archimedes Tech SPAC Partners II Co. (Aug 2026), Armada Acquisition Corp. II (Aug 2026), Blue Acquisition Corp. (Aug 2026)
- Linden Capital L.P. also filed stake reports on 73 other companies: Southport Acquisition Corp. II (Oct 2026), NewHold Investment Corp IV (Sep 2026), Haymaker Acquisition Corp V (Sep 2026)
- Adage Capital Management, L.P. also filed stake reports on 136 other companies: ACP Holdings Acquisition Corp. (Aug 2026), AmperCap Acquisition Company (Aug 2026), Aura Biosciences, Inc. (Aug 2026)
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Purpose of Transaction (Item 4)
Twelve Seas Sponsor LLC
In connection with the organization of the Issuer, in December 2024, 5,692,500 Class B Ordinary Shares, of which up 742,500 were subject to forfeiture if the underwriter's over-allotment option was not exercised in full (the "Founder Shares") were purchased by the Sponsor for the amount of $25,000, pursuant to a Securities Subscription Agreement, dated as of December 4, 2024 by and between the Sponsor and the Issuer (the "Founder Share Purchase Agreement"), as more fully described in Item 6 of this Schedule 13D which information is incorporated herein by reference. On December 15, 2025, simultaneously with the consummation of the Issuer's Initial Public Offering (the "IPO"), the Sponsor purchased 300,000 Private Placement Units of the Issuer at $10.00 per Private Placement Unit, pursuant to a Private Placement Units Purchase Agreement, dated as of December 11, 2025, by and between the Issuer and the Sponsor (the "Private Placement Units Purchase Agreement"), as more fully described in Item 6 of this Schedule 13D, which information is incorporated herein by reference. Each Private Placement Unit consists of one Class A Ordinary Share and one right to receive one tenth (1/10) of a Class A Ordinary Share upon the consummation of an initial business combination ("Private Placement Rights") (as described more fully in the Issuer's Final Prospectus dated December 11, 2025). The Ordinary Shares owned by the Reporting Persons have been acquired for investment purposes. The Reporting …The first part of Item 4 of the SCHEDULE 13D filed 2025-12-22; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-12-19 | Linden Advisors LP | 5.1% | SCHEDULE 13G |
| 2025-12-19 | Tenor Capital Management Company, L.P. | 5.2% | SCHEDULE 13G |
| 2025-12-22 | Twelve Seas Sponsor LLC | 25.6% | SCHEDULE 13D |
| 2026-02-12 | Adage Capital Management, L.P. | 7.61% | SCHEDULE 13G |
Questions about who owns Twelve Seas Investment Co III
Who owns Twelve Seas Investment Co III?
On this page, 4 holders' latest ownership filings report 5% or more of Twelve Seas Investment Co III: Twelve Seas Sponsor LLC (25.6%, Schedule 13D, filed 2025-12-22), Adage Capital Management, L.P. (7.61%, Schedule 13G, filed 2026-02-12), Tenor Capital Management Company, L.P. (5.2%, Schedule 13G, filed 2025-12-19) and Linden Advisors LP (5.1%, Schedule 13G, filed 2025-12-19).
Who are the largest shareholders of Twelve Seas Investment Co III?
By the share each holder's latest filing reports, the largest holders of Twelve Seas Investment Co III on this page are Twelve Seas Sponsor LLC (25.6%), Adage Capital Management, L.P. (7.61%) and Tenor Capital Management Company, L.P. (5.2%).
When did Twelve Seas Sponsor LLC buy into Twelve Seas Investment Co III?
The filings give report dates, not purchase dates. The earliest filing from Twelve Seas Sponsor LLC on this page is the Schedule 13D, filed 2025-12-22, reporting 25.6%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Twelve Seas Investment Co III
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| December 12, 2025 | IPO filing, Form 424B4 | — | IPO filings | Source |
| November 21, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| November 12, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| September 12, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| May 27, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| April 7, 2025 | IPO filing, Form S-1 | — | IPO filings | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.