23 institutions reported holding $54.1M of PLUTONIAN ACQUISITION CORP II (PLUNU) in SEC 13F filings for 2026-06-30. Largest institutional holders: Magnetar Financial LLC ($6.6M), Decagon Asset Management LLP ($5.9M), Polar Asset Management Partners Inc. ($5.1M), ARISTEIA CAPITAL, L.L.C. ($5.1M), AQR Arbitrage LLC ($5.0M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Magnetar Financial LLC | $6.6M | 650,000 | New |
| 2 | Decagon Asset Management LLP | $5.9M | 585,000 | New |
| 3 | Polar Asset Management Partners Inc. | $5.1M | 500,000 | New |
| 4 | ARISTEIA CAPITAL, L.L.C. | $5.1M | 500,000 | New |
| 5 | AQR Arbitrage LLC | $5.0M | 489,515 | New |
| 6 | MANGROVE PARTNERS IM, LLC | $4.6M | 450,000 | New |
| 7 | StoneX Group Inc. | $3.0M | 299,107 | New |
| 8 | Calamos Advisors LLC | $2.5M | 250,000 | New |
| 9 | LMR Partners LLP | $2.5M | 250,000 | New |
| 10 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $2.5M | 249,796 | New |
| 11 | Wealthspring Capital LLC | $2.0M | 200,000 | New |
| 12 | TWO SIGMA INVESTMENTS, LP | $1.8M | 181,250 | New |
| 13 | BNP PARIBAS FINANCIAL MARKETS | $1.6M | 160,485 | New |
| 14 | Radcliffe Capital Management, L.P. | $1.4M | 134,132 | New |
| 15 | TORONTO DOMINION BANK | $1.3M | 127,321 | New |
| 16 | Yakira Capital Management, Inc. | $1.0M | 100,000 | New |
| 17 | Lineage Point Capital LP | $524,096 | 51,686 | New |
| 18 | GABELLI & Co INVESTMENT ADVISERS, INC. | $481,650 | 47,500 | New |
| 19 | ABC ARBITRAGE SA | $304,200 | 30,000 | New |
| 20 | GLAZER CAPITAL, LLC | $304,000 | 30,000 | New |
| 21 | Clear Street Group Inc. | $283,879 | 27,996 | New |
| 22 | Schonfeld Strategic Advisors LLC | $220,403 | 21,736 | New |
| 23 | UBS Group AG | $335 | 33 | New |
Source: SEC Form 13F filings · as of 2026-06-30