As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Spartacus Acquisition Corp. II. The largest reported stake is Fort Baker Capital Management LP's, at 8.6%. 6 filings are on record since February 19, 2026 (Schedule 13G, August 14, 2026).
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Key facts
- · Reporting person: Fort Baker Capital Management LP · Sole voting: 0 · Shared voting: 1,970,838 · Sole dispositive: 0 · Shared dispositive: 1,970,838 · SCHEDULE 13G, 2026-08-14
- · Reporting person: Harraden Circle Investments, LLC · Sole voting: 0 · Shared voting: 726,100 · Sole dispositive: 0 · Shared dispositive: 726,100 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Linden Capital L.P. · Sole voting: 0 · Shared voting: 1,211,717 · Sole dispositive: 0 · Shared dispositive: 1,211,717 · SCHEDULE 13G, 2026-08-07
- · Reporting person: Adage Capital Management, L.P. · Sole voting: 0 · Shared voting: 1,800,000 · Sole dispositive: 0 · Shared dispositive: 1,800,000 · SCHEDULE 13G, 2026-05-13
- · Holder: RP Investment Advisors LP · Percent: 5.4% · SCHEDULE 13G
Spartacus Acquisition Corp. II has 6 Schedule 13D or 13G filings on record since 2026-02-19. 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 |
|---|---|---|---|---|
| Fort Baker Capital Management LP | 8.6% | 1,970,838 | SCHEDULE 13G, 2026-08-14 | 2026-06-30 |
| Adage Capital Management, L.P. | 7.83% | 1,800,000 | SCHEDULE 13G, 2026-05-13 | 2026-03-31 |
| Linden Advisors LP | 5.5% | 1,253,854 | SCHEDULE 13G, 2026-08-07 | 2026-08-03 |
| RP Investment Advisors LP | 5.4% | 1,250,000 | SCHEDULE 13G, 2026-02-20 | 2026-02-12 |
| Harraden Circle Investments, LLC | 3.16% | 726,100 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
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More on Spartacus Acquisition Corp. II and the records around it.
Companies that share a holder
- RP Investment Advisors LP also filed stake reports on 17 other companies: Yorkville International Capital Corp. (Sep 2026), Amanat Acquisition Corp. (Aug 2026), ProCap Acquisition Corp (Aug 2026)
- Fort Baker Capital Management LP also filed stake reports on 26 other companies: Agriculture & Natural Solutions Acquisition Corp (Aug 2026), Bleichroeder Acquisition Corp. II (Aug 2026), Cartesian Growth Corp III (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)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Fort Baker Capital Management LP | 0 | 1,970,838 | 0 | 1,970,838 | SCHEDULE 13G, 2026-08-14 |
| Steven Patrick Pigott | 0 | 1,970,838 | 0 | 1,970,838 | SCHEDULE 13G, 2026-08-14 |
| Fort Baker Capital, LLC | 0 | 1,970,838 | 0 | 1,970,838 | SCHEDULE 13G, 2026-08-14 |
| Adage Capital Management, L.P. | 0 | 1,800,000 | 0 | 1,800,000 | SCHEDULE 13G, 2026-05-13 |
| Robert Atchinson | 0 | 1,800,000 | 0 | 1,800,000 | SCHEDULE 13G, 2026-05-13 |
| Phillip Gross | 0 | 1,800,000 | 0 | 1,800,000 | SCHEDULE 13G, 2026-05-13 |
| Linden Capital L.P. | 0 | 1,211,717 | 0 | 1,211,717 | SCHEDULE 13G, 2026-08-07 |
| Linden GP LLC | 0 | 1,211,717 | 0 | 1,211,717 | SCHEDULE 13G, 2026-08-07 |
| Linden Advisors LP | 0 | 1,253,854 | 0 | 1,253,854 | SCHEDULE 13G, 2026-08-07 |
| Siu Min Wong | 0 | 1,253,854 | 0 | 1,253,854 | SCHEDULE 13G, 2026-08-07 |
| Harraden Circle Investments, LLC | 0 | 726,100 | 0 | 726,100 | SCHEDULE 13G/A, 2026-08-14 |
| Frederick V. Fortmiller, Jr. | 0 | 726,100 | 0 | 726,100 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Spartacus Acquisition Corp. II by CUSIP G8303R100 and gives its principal executive office as 3800 N LAMAR BLVD, SUITE 200, AUSTIN, TX 78756 (SCHEDULE 13G, 2026-08-14).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-02-19 | Harraden Circle Investments, LLC | 6.52% | SCHEDULE 13G |
| 2026-02-20 | RP Investment Advisors LP | 5.4% | SCHEDULE 13G |
| 2026-05-13 | Adage Capital Management, L.P. | 7.83% | SCHEDULE 13G |
| 2026-08-07 | Linden Advisors LP | 5.5% | SCHEDULE 13G |
| 2026-08-14 | Harraden Circle Investments, LLC | 3.16% | SCHEDULE 13G/A |
| 2026-08-14 | Fort Baker Capital Management LP | 8.6% | SCHEDULE 13G |
Questions about who owns Spartacus Acquisition Corp. II
Who owns Spartacus Acquisition Corp. II?
On this page, 4 holders' latest ownership filings report 5% or more of Spartacus Acquisition Corp. II: Fort Baker Capital Management LP (8.6%, Schedule 13G, filed 2026-08-14), Adage Capital Management, L.P. (7.83%, Schedule 13G, filed 2026-05-13), Linden Advisors LP (5.5%, Schedule 13G, filed 2026-08-07) and RP Investment Advisors LP (5.4%, Schedule 13G, filed 2026-02-20).
Who are the largest shareholders of Spartacus Acquisition Corp. II?
By the share each holder's latest filing reports, the largest holders of Spartacus Acquisition Corp. II on this page are Fort Baker Capital Management LP (8.6%), Adage Capital Management, L.P. (7.83%) and Linden Advisors LP (5.5%).
When did Fort Baker Capital Management LP buy into Spartacus Acquisition Corp. II?
The filings give report dates, not purchase dates. The earliest filing from Fort Baker Capital Management LP on this page is the Schedule 13G, filed 2026-08-14, reporting 8.6%.
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%); 6 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 Spartacus Acquisition Corp. II
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| February 11, 2026 | IPO filing, Form 424B4 | — | IPO filings | Source |
| January 28, 2026 | IPO filing, Form S-1/A | — | IPO filings | Source |
| December 23, 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.