PLUTONIAN ACQUISITION CORP I PLUN
ORD CL A · Common Stock · CUSIP G71382108
- SectorBlank check (SPAC)
- IndustryBlank Checks
- HeadquartersNew York, NY
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 14.1m as of 2026-07-15, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $9.95.
Biggest buyers
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | New | +992.1k |
| TORONTO DOMINION BANK | New | +646.3k |
| Crossingbridge Advisors, LLC | New | +500.0k |
| MIZUHO SECURITIES USA LLC | New | +318.1k |
| D. E. Shaw & Co., Inc. | New | +318.0k |
| Shaolin Capital Management LLC | New | +314.5k |
| WHITEBOX ADVISORS LLC | New | +250.0k |
| WOLVERINE ASSET MANAGEMENT LLC | New | +245.2k |
| BERKLEY W R CORP | New | +198.6k |
| StoneX Group Inc. | New | +187.0k |
Biggest sellers
| None |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| HIGHBRIDGE CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-08-14 | 8.7% |
| Magnetar Financial LLC 13G · institution new · filed 2026-08-13 | 5.7% |
Fell to 5% or below in the last year: Feis Equities LLC (3.3%, 2026-07-27)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| HIGHBRIDGE CAPITAL MANAGEMENT LLC 0.34% of their portfolio | 992.1k $9.9m | New |
| TORONTO DOMINION BANK 0.01% of their portfolio | 646.3k $6.4m | New |
| Crossingbridge Advisors, LLC 0.88% of their portfolio | 500.0k $5.0m | New |
| MIZUHO SECURITIES USA LLC 0.03% of their portfolio | 318.1k $3.1m | New |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 318.0k $3.2m | New |
| Shaolin Capital Management LLC 0.18% of their portfolio | 314.5k $3.1m | New |
| WHITEBOX ADVISORS LLC 0.04% of their portfolio | 250.0k $2.5m | New |
| WOLVERINE ASSET MANAGEMENT LLC 0.03% of their portfolio | 245.2k $2.4m | New |
| BERKLEY W R CORP 0.10% of their portfolio | 198.6k $2.0m | New |
| StoneX Group Inc. 0.07% of their portfolio | 187.0k $1.9m | New |
| Periscope Capital Inc. 0.28% of their portfolio | 177.5k $1.8m | New |
| Clear Street Group Inc. 0.00% of their portfolio | 136.0k $1.4m | New |
| BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio | 100.9k $1.0m | New |
| HEIGHTS CAPITAL MANAGEMENT, INC 0.23% of their portfolio | 100.0k $995.0k | New |
| Hudson Bay Capital Management LP 0.00% of their portfolio | 100.0k $995.0k | New |
| RLH Capital LLC 0.48% of their portfolio | 100.0k $995.0k | New |
| L1 Global Manager Pty Ltd 0.40% of their portfolio | 50.0k $497.5k | New |
| Quarry LP 0.08% of their portfolio | 50.0k $497.5k | New |
| SHP Wealth Management 0.00% of their portfolio | 50 $498 | New |