GP-Act III Acquisition Corp. has 11 Schedule 13D or 13G filings on record since 2025-08-12. 3 holders' latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share ("ordinary shares"). Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Polar Asset Management Partners Inc. | 11.1% | 1,800,000 | SCHEDULE 13G, 2026-06-04 | 2026-05-31 |
| AQR Capital Management, LLC | 8.66% | 1,400,000 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Meteora Capital, LLC | 6.7% | 1,926,999 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Picton Mahoney Asset Management | 4.78% | 1,375,000 | SCHEDULE 13G/A, 2026-04-27 | 2026-03-31 |
| MMCAP International Inc. SPC | 4.44% | 1,275,000 | SCHEDULE 13G/A, 2025-08-12 | 2025-06-30 |
| Karpus Management, Inc. | 0% | 0 | SCHEDULE 13G/A, 2026-06-05 | 2026-05-29 |
| Bank of Montreal | 0% | 0 | SCHEDULE 13G/A, 2026-02-12 | 2025-12-31 |
| First Trust Merger Arbitrage Fund | 0% | 0 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | MMCAP International Inc. SPC | 4.44% | SCHEDULE 13G/A |
| 2025-08-14 | Karpus Management, Inc. | 6.51% | SCHEDULE 13G/A |
| 2025-08-14 | Polar Asset Management Partners Inc. | 4.1% | SCHEDULE 13G/A |
| 2025-08-14 | Meteora Capital, LLC | 6.7% | SCHEDULE 13G |
| 2025-11-13 | Bank of Montreal | 5.14% | SCHEDULE 13G |
| 2026-02-12 | Bank of Montreal | 0% | SCHEDULE 13G/A |
| 2026-04-27 | Picton Mahoney Asset Management | 4.78% | SCHEDULE 13G/A |
| 2026-06-04 | Polar Asset Management Partners Inc. | 11.1% | SCHEDULE 13G |
| 2026-06-05 | Karpus Management, Inc. | 0% | SCHEDULE 13G/A |
| 2026-08-14 | AQR Capital Management, LLC | 8.66% | SCHEDULE 13G/A |
| 2026-08-14 | First Trust Merger Arbitrage Fund | 0% | SCHEDULE 13G/A |
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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.