As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Bain Capital GSS Investment Corp. The largest reported stake is Bain Capital GSS Investment Sponsor LLC's, at 21.18%. 6 filings are on record since October 15, 2025 (Schedule 13G, October 15, 2025).
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Key facts
- · Reporting person: Empyrean Capital Partners, LP · Sole voting: 0 · Shared voting: 4,340,641 · Sole dispositive: 0 · Shared dispositive: 4,340,641 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: Fort Baker Capital Management LP · Sole voting: 0 · Shared voting: 3,981,252 · Sole dispositive: 0 · Shared dispositive: 3,981,252 · SCHEDULE 13G/A, 2026-05-15
- · Holder: Empyrean Capital Partners, LP · Percent: 8.5% · SCHEDULE 13G
- · Holder: Fort Baker Capital Management LP · Percent: 5.9% · SCHEDULE 13G
- · Holder: Adage Capital Management, L.P. · Percent: 6.4% · SCHEDULE 13G
Bain Capital GSS Investment Corp. has 6 Schedule 13D or 13G filings on record since 2025-10-15. 4 holders' latest filing reports 5% or more of class a ordinary shares, $0.0001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Bain Capital GSS Investment Sponsor LLC | 21.18% | 12,370,000 | SCHEDULE 13G, 2025-10-15 | 2025-10-01 |
| Empyrean Capital Partners, LP | 9.26% | 4,340,641 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Fort Baker Capital Management LP | 8.5% | 3,981,252 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Adage Capital Management, L.P. | 6.4% | 3,000,000 | SCHEDULE 13G, 2026-02-12 | 2025-12-31 |
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More on Bain Capital GSS Investment Corp. and the records around it.
Companies that share a holder
- Empyrean Capital Partners, LP also filed stake reports on 9 other companies: Churchill Capital Corp XI (Aug 2026), Churchill Capital Corp. XII (Aug 2026), Altice USA, Inc. (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)
- 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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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Empyrean Capital Partners, LP | 0 | 4,340,641 | 0 | 4,340,641 | SCHEDULE 13G/A, 2026-05-15 |
| Amos Meron | 0 | 4,340,641 | 0 | 4,340,641 | SCHEDULE 13G/A, 2026-05-15 |
| Fort Baker Capital Management LP | 0 | 3,981,252 | 0 | 3,981,252 | SCHEDULE 13G/A, 2026-05-15 |
| Steven Patrick Pigott | 0 | 3,981,252 | 0 | 3,981,252 | SCHEDULE 13G/A, 2026-05-15 |
| Fort Baker Capital, LLC | 0 | 3,981,252 | 0 | 3,981,252 | SCHEDULE 13G/A, 2026-05-15 |
The latest filing identifies Bain Capital GSS Investment Corp. by CUSIP G0R78B106 and gives its principal executive office as 200 Clarendon Street, Boston, MA 02116 (SCHEDULE 13G/A, 2026-05-15).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-10-15 | Bain Capital GSS Investment Sponsor LLC | 21.18% | SCHEDULE 13G |
| 2026-02-12 | Adage Capital Management, L.P. | 6.4% | SCHEDULE 13G |
| 2026-02-17 | Empyrean Capital Partners, LP | 8.5% | SCHEDULE 13G |
| 2026-02-17 | Fort Baker Capital Management LP | 5.9% | SCHEDULE 13G |
| 2026-05-15 | Empyrean Capital Partners, LP | 9.26% | SCHEDULE 13G/A |
| 2026-05-15 | Fort Baker Capital Management LP | 8.5% | SCHEDULE 13G/A |
Questions about who owns Bain Capital GSS Investment Corp.
Who owns Bain Capital GSS Investment Corp.?
On this page, 4 holders' latest ownership filings report 5% or more of Bain Capital GSS Investment Corp.: Bain Capital GSS Investment Sponsor LLC (21.18%, Schedule 13G, filed 2025-10-15), Empyrean Capital Partners, LP (9.26%, Schedule 13G/A, filed 2026-05-15), Fort Baker Capital Management LP (8.5%, Schedule 13G/A, filed 2026-05-15) and Adage Capital Management, L.P. (6.4%, Schedule 13G, filed 2026-02-12).
Who are the largest shareholders of Bain Capital GSS Investment Corp.?
By the share each holder's latest filing reports, the largest holders of Bain Capital GSS Investment Corp. on this page are Bain Capital GSS Investment Sponsor LLC (21.18%), Empyrean Capital Partners, LP (9.26%) and Fort Baker Capital Management LP (8.5%).
When did Bain Capital GSS Investment Sponsor LLC buy into Bain Capital GSS Investment Corp.?
The filings give report dates, not purchase dates. The earliest filing from Bain Capital GSS Investment Sponsor LLC on this page is the Schedule 13G, filed 2025-10-15, reporting 21.18%.
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 Bain Capital GSS Investment Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 30, 2025 | IPO filing, Form 424B4 | $10 a share | IPO filings | Source |
| September 17, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| September 9, 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.