22 institutions reported holding $16.9M of EUREKA ACQUISITION CORP (EURK) in SEC 13F filings for 2026-06-30. Largest institutional holders: BERKLEY W R CORP ($3.6M), MIZUHO SECURITIES USA LLC ($3.3M), AQR Arbitrage LLC ($2.1M), Quarry LP ($1.8M), RLH Capital LLC ($1.8M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | BERKLEY W R CORP | $3.6M | 315,488 | Hold |
| 2 | MIZUHO SECURITIES USA LLC | $3.3M | 300,455 | Hold |
| 3 | AQR Arbitrage LLC | $2.1M | 171,422 | Added |
| 4 | Quarry LP | $1.8M | 155,400 | Hold |
| 5 | RLH Capital LLC | $1.8M | 155,400 | Trimmed |
| 6 | Cable Car Capital, LP | $1.2M | 100,000 | Hold |
| 7 | Crossingbridge Advisors, LLC | $842,431 | 73,768 | Trimmed |
| 8 | Yakira Capital Management, Inc. | $834,559 | 72,951 | Hold |
| 9 | Westchester Capital Management, LLC | $571,000 | 50,000 | Hold |
| 10 | Clear Street Group Inc. | $523,148 | 43,632 | Trimmed |
| 11 | GOLDMAN SACHS GROUP INC | $250,087 | 20,858 | Hold |
| 12 | Warberg Asset Management LLC | $115,052 | 10,057 | Trimmed |
| 13 | UBS Group AG | $1,019 | 85 | Trimmed |
| 14 | MORGAN STANLEY | $588 | 49 | Trimmed |
| 15 | Karpus Management, Inc. | $0 | 0 | Exited |
| 16 | HEIGHTS CAPITAL MANAGEMENT, INC | $0 | 0 | Exited |
| 17 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
| 18 | Polar Asset Management Partners Inc. | $0 | 0 | Exited |
| 19 | HRT FINANCIAL LP | $0 | 0 | Exited |
| 20 | Logan Stone Capital, LLC | $0 | 0 | Exited |
| 21 | METEORA CAPITAL, LLC | $0 | 0 | Exited |
| 22 | TORONTO DOMINION BANK | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30