As of November 10, 2026, 5 holders' latest Schedule 13D or 13G filings report owning 5% or more of Kochav Defense Acquisition Corp. The largest reported stake is Polar Asset Management Partners Inc.'s, at 8.3%. 11 filings are on record since July 31, 2025 (Schedule 13G, November 14, 2025).
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Key facts
- · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 2,103,124 · Sole dispositive: 0 · Shared dispositive: 2,103,124 · SCHEDULE 13G/A, 2026-11-09
- · Holder: W.R. Berkley Corporation · Percent: 6.5% · SCHEDULE 13G/A
- · Reporting person: Bank of Montreal · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-02-12
- · Holder: W. R. Berkley Corporation · Percent: 6.5% · SCHEDULE 13G/A
- · Reporting person: Polar Asset Management Partners Inc. · Sole voting: 2,150,000 · Shared voting: 0 · Sole dispositive: 2,150,000 · Shared dispositive: 0 · SCHEDULE 13G, 2025-11-14
Kochav Defense Acquisition Corp. has 11 Schedule 13D or 13G filings on record since 2025-07-31. 5 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 |
|---|---|---|---|---|
| Polar Asset Management Partners Inc. | 8.3% | 2,150,000 | SCHEDULE 13G, 2025-11-14 | 2025-09-30 |
| W. R. Berkley Corporation | 8.1% | 2,103,124 | SCHEDULE 13G/A, 2026-11-09 | 2026-09-30 |
| Magnetar Financial LLC | 7.35% | 1,900,000 | SCHEDULE 13G, 2025-08-08 | 2025-06-30 |
| AQR Capital Management, LLC | 5.54% | 1,429,380 | SCHEDULE 13G/A, 2025-11-12 | 2025-09-30 |
| Aristeia Capital, L.L.C. | 5.13% | 1,325,000 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Bank of Montreal | 0% | 0 | SCHEDULE 13G/A, 2026-02-12 | 2025-12-31 |
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More on Kochav Defense Acquisition Corp. and the records around it.
Companies that share a holder
- Bank of Montreal also filed stake reports on 49 other companies: Akari Therapeutics Plc (Aug 2026), Alarm.com Holdings, Inc. (Aug 2026), North American Construction Group Ltd. (Aug 2026)
- Aristeia Capital, L.L.C. also filed stake reports on 54 other companies: Apogee Acquisition Corp (Aug 2026), ARC Group Acquisition I Corp (Aug 2026), ClearThink 1 Acquisition Corp. (Aug 2026)
- Polar Asset Management Partners Inc. also filed stake reports on 69 other companies: Aeon Acquisition I Corp. (Aug 2026), Bitcoin Depot Inc. (Aug 2026), ACP Holdings Acquisition Corp. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Polar Asset Management Partners Inc. | 2,150,000 | 0 | 2,150,000 | 0 | SCHEDULE 13G, 2025-11-14 |
| W. R. Berkley Corporation | 0 | 2,103,124 | 0 | 2,103,124 | SCHEDULE 13G/A, 2026-11-09 |
| Berkley Insurance Company | 0 | 2,103,124 | 0 | 2,103,124 | SCHEDULE 13G/A, 2026-11-09 |
| Bank of Montreal | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-02-12 |
| Bank Of Montreal Holding Inc. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-02-12 |
| Bmo Nesbitt Burns Inc. | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-02-12 |
The latest filing identifies Kochav Defense Acquisition Corp. by CUSIP G5304D106 and gives its principal executive office as 575 Fifth Avenue, 14th Floor, New York, NY 10017 (SCHEDULE 13G/A, 2026-11-09).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-31 | Bank of Montreal | 8.33% | SCHEDULE 13G |
| 2025-08-08 | Magnetar Financial LLC | 7.35% | SCHEDULE 13G |
| 2025-08-12 | AQR Capital Management, LLC | 7.26% | SCHEDULE 13G |
| 2025-08-14 | Aristeia Capital, L.L.C. | 5.13% | SCHEDULE 13G |
| 2025-11-10 | W. R. Berkley Corporation | 5.6% | SCHEDULE 13G |
| 2025-11-12 | AQR Capital Management, LLC | 5.54% | SCHEDULE 13G/A |
| 2025-11-14 | Polar Asset Management Partners Inc. | 8.3% | SCHEDULE 13G |
| 2026-02-10 | W. R. Berkley Corporation | 6.5% | SCHEDULE 13G/A |
| 2026-02-12 | Bank of Montreal | 0% | SCHEDULE 13G/A |
| 2026-05-08 | W.R. Berkley Corporation | 6.5% | SCHEDULE 13G/A |
| 2026-11-09 | W. R. Berkley Corporation | 8.1% | SCHEDULE 13G/A |
Questions about who owns Kochav Defense Acquisition Corp.
Who owns Kochav Defense Acquisition Corp.?
On this page, 5 holders' latest ownership filings report 5% or more of Kochav Defense Acquisition Corp.: Polar Asset Management Partners Inc. (8.3%, Schedule 13G, filed 2025-11-14), W. R. Berkley Corporation (8.1%, Schedule 13G/A, filed 2026-11-09), Magnetar Financial LLC (7.35%, Schedule 13G, filed 2025-08-08), AQR Capital Management, LLC (5.54%, Schedule 13G/A, filed 2025-11-12) and Aristeia Capital, L.L.C. (5.13%, Schedule 13G, filed 2025-08-14).
Who are the largest shareholders of Kochav Defense Acquisition Corp.?
By the share each holder's latest filing reports, the largest holders of Kochav Defense Acquisition Corp. on this page are Polar Asset Management Partners Inc. (8.3%), W. R. Berkley Corporation (8.1%) and Magnetar Financial LLC (7.35%).
When did Polar Asset Management Partners Inc. buy into Kochav Defense Acquisition Corp.?
The filings give report dates, not purchase dates. The earliest filing from Polar Asset Management Partners Inc. on this page is the Schedule 13G, filed 2025-11-14, reporting 8.3%.
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%); 11 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 Kochav Defense Acquisition Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| May 28, 2025 | IPO filing, Form 424B4 | — | IPO filings | Source |
| May 23, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| May 16, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| May 6, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| April 25, 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.