20 institutions reported holding $29.4M of RIBBON ACQUISITION CORP (RIBB) in SEC 13F filings for 2026-06-30. Largest institutional holders: RIVERNORTH CAPITAL MANAGEMENT, LLC ($4.3M), Westchester Capital Management, LLC ($3.9M), WOLVERINE ASSET MANAGEMENT LLC ($3.2M), BERKLEY W R CORP ($3.1M), Hudson Bay Capital Management LP ($2.7M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $4.3M | 400,000 | Hold |
| 2 | Westchester Capital Management, LLC | $3.9M | 375,734 | Hold |
| 3 | WOLVERINE ASSET MANAGEMENT LLC | $3.2M | 295,983 | Trimmed |
| 4 | BERKLEY W R CORP | $3.1M | 297,592 | Added |
| 5 | Hudson Bay Capital Management LP | $2.7M | 250,000 | Hold |
| 6 | Karpus Management, Inc. | $2.3M | 218,287 | Hold |
| 7 | AQR Arbitrage LLC | $2.0M | 185,283 | Hold |
| 8 | D. E. Shaw & Co., Inc. | $1.6M | 150,000 | Hold |
| 9 | GABELLI & Co INVESTMENT ADVISERS, INC. | $1.5M | 139,200 | Hold |
| 10 | Shaolin Capital Management LLC | $1.1M | 105,000 | Trimmed |
| 11 | GABELLI FUNDS LLC | $869,376 | 80,797 | Trimmed |
| 12 | Clear Street Group Inc. | $736,802 | 68,476 | Added |
| 13 | GOLDMAN SACHS GROUP INC | $646,730 | 60,105 | Hold |
| 14 | Centiva Capital, LP | $430,400 | 40,000 | Hold |
| 15 | Dakota Wealth Management | $315,624 | 29,333 | Hold |
| 16 | Warberg Asset Management LLC | $234,848 | 21,826 | Hold |
| 17 | TORONTO DOMINION BANK | $220,397 | 20,483 | Added |
| 18 | MIZUHO SECURITIES USA LLC | $161,400 | 15,000 | New |
| 19 | UBS Group AG | $24,597 | 2,286 | Added |
| 20 | MORGAN STANLEY | $506 | 47 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30