SilverBox Corp IV has 16 Schedule 13D or 13G filings on record since 2025-08-12. 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 |
|---|---|---|---|---|
| W. R. Berkley Corporation | 9.4% | 1,923,442 | SCHEDULE 13G/A, 2026-08-06 | 2026-06-30 |
| Mizuho Financial Group, Inc. | 8% | 1,645,673 | SCHEDULE 13G, 2026-02-12 | 2025-12-31 |
| Polar Asset Management Partners Inc. | 7.2% | 1,480,000 | SCHEDULE 13G/A, 2025-08-14 | 2025-06-30 |
| Barclays PLC | 7% | 1,431,850 | SCHEDULE 13G, 2026-05-14 | 2026-03-31 |
| Aqr Capital Management LLC | 4.95% | 1,012,401 | SCHEDULE 13G/A, 2026-08-12 | 2026-06-30 |
| The Goldman Sachs Group, Inc. | 3.2% | 654,022 | SCHEDULE 13G/A, 2025-11-10 | 2025-09-30 |
| Highbridge Capital Management LLC | 1.4% | 280,000 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Healthcare of Ontario Pension Plan Trust Fund | 0.5% | 100,000 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
| Sculptor Capital LP | 0% | 0 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | Barclays PLC | 4.74% | SCHEDULE 13G/A |
| 2025-08-13 | The Goldman Sachs Group, Inc. | 7.9% | SCHEDULE 13G/A |
| 2025-08-13 | Healthcare of Ontario Pension Plan Trust Fund | 0.5% | SCHEDULE 13G/A |
| 2025-08-14 | Highbridge Capital Management, LLC | 5.9% | SCHEDULE 13G |
| 2025-08-14 | Sculptor Capital LP | 5.87% | SCHEDULE 13G/A |
| 2025-08-14 | AQR Capital Management, LLC | 6.59% | SCHEDULE 13G/A |
| 2025-08-14 | Polar Asset Management Partners Inc. | 7.2% | SCHEDULE 13G/A |
| 2025-11-10 | The Goldman Sachs Group, Inc. | 3.2% | SCHEDULE 13G/A |
| 2025-11-14 | Highbridge Capital Management LLC | 1.4% | SCHEDULE 13G/A |
| 2026-02-11 | W. R. Berkley Corporation | 5.9% | SCHEDULE 13G |
| 2026-02-12 | Mizuho Financial Group, Inc. | 8% | SCHEDULE 13G |
| 2026-02-13 | Sculptor Capital LP | 0% | SCHEDULE 13G/A |
| 2026-05-08 | W. R. Berkley Corporation | 7.4% | SCHEDULE 13G/A |
| 2026-05-14 | Barclays PLC | 7% | SCHEDULE 13G |
| 2026-08-06 | W. R. Berkley Corporation | 9.4% | SCHEDULE 13G/A |
| 2026-08-12 | Aqr Capital Management LLC | 4.95% | 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.