Perimeter Acquisition Corp. I
PMTRW- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002061473
No open-market purchases or sales by Perimeter Acquisition Corp. I insiders were filed in the last 90 days; 38 institutions reported holding it in 13F filings for Q2 2026, worth $9.39M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in Perimeter Acquisition Corp. I as of Sep 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 37
- +15 vs. Q2 2025
- Shares held
- 10.1M
- +1.94M (+23.9%) vs. Q2 2025
- Total value
- $6.06M
- +$790.3K (+15.0%) vs. Q2 2025
- New holders
- 16
- 5 more added
- Sold out
- 1
- 3 more reduced
1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting PMTRW on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 38 | $9.39M |
| Q1 2026 | 35 | $6.94M |
| Q4 2025 | 35 | $7.59M |
| Q3 2025 | 37 | $6.06M |
| Q2 2025 | 23 | $5.29M |
| Q1 2025 | 0 | $0 |
| Q4 2024 | 0 | $0 |
| Q3 2024 | 0 | $0 |
| Q2 2024 | 0 | $0 |
| Q1 2024 | 0 | $0 |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding Perimeter Acquisition Corp. I; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 1,156,083 | $693.6K | 0.14% | +163,243+16.4% | Added |
| Linden Advisors LP | 850,000 | $505.8K | 0.00% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 750,000 | $472.5K | 0.00% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 750,000 | $450.0K | 0.00% | 00.0% | Unchanged |
| Magnetar Financial LLC | 750,000 | $446.3K | 0.00% | 00.0% | Unchanged |
| Moore Capital Management, LP | 600,000 | $360.0K | 0.01% | +600,000 | New |
| Saba Capital Management, L.P. | 554,845 | $332.9K | 0.01% | 00.0% | Unchanged |
| Toronto Dominion Bank | 504,752 | $302.9K | 0.00% | +236,091+87.9% | Added |
| Governors Lane LP | 452,528 | $271.5K | 0.04% | 00.0% | Unchanged |
| Walleye Capital LLC | 410,128 | $246.1K | 0.00% | +124,074+43.4% | Added |
| Fort Baker Capital Management LP | 399,999 | $240.0K | 0.04% | 00.0% | Unchanged |
| Lighthouse Investment Partners, LLC | 375,000 | $225.0K | 0.01% | 00.0% | Unchanged |
| Shaolin Capital Management LLC | 317,217 | $190.3K | 0.01% | +4,716+1.5% | Added |
| D. E. Shaw & Co., Inc. | 250,000 | $160.2K | 0.00% | 00.0% | Unchanged |
| Weiss Asset Management LP | 201,445 | $120.9K | 0.00% | +201,445 | New |
| HBK Investments L P | 200,000 | $120.0K | 0.00% | +200,000 | New |
| Meteora Capital, LLC | 166,269 | $99.8K | 0.01% | −91,879−35.6% | Reduced |
| Periscope Capital Inc. | 165,100 | $99.1K | 0.02% | +62,900+61.5% | Added |
| Picton Mahoney Asset Management | 162,500 | $97.0K | 0.00% | +162,500 | New |
| CNH Partners LLC | 150,846 | $90.5K | 0.00% | +150,846 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 138,871 | $83.3K | 0.00% | +138,871 | New |
| K2 Principal Fund, L.P. | 123,618 | $74.2K | 0.01% | 00.0% | Unchanged |
| Context Capital Management, LLC | 100,000 | $60.0K | 0.00% | 00.0% | Unchanged |
| Aristeia Capital LLC | 75,000 | $45.0K | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 69,600 | $41.8K | 0.00% | +69,600 | New |
| Glazer Capital, LLC | 61,172 | $37.0K | 0.00% | −137,428−69.2% | Reduced |
| Radcliffe Capital Management, L.P. | 56,300 | $33.8K | 0.00% | +56,300 | New |
| Tenor Capital Management Co., L.P. | 50,000 | $30.0K | 0.00% | +50,000 | New |
| BNP Paribas Arbitrage, SA | 49,152 | $29.5K | 0.00% | +49,152 | New |
| Wealthspring Capital LLC | 48,950 | $29.4K | 0.01% | +48,950 | New |
| Hudson Bay Capital Management LP | 32,312 | $19.4K | 0.00% | +32,312 | New |
| Heights Capital Management, Inc | 29,462 | $17.7K | 0.01% | +29,462 | New |
| CSS LLC | 25,000 | $15.0K | 0.00% | +25,000 | New |
| Clear Street Group Inc. | 23,672 | $14.2K | 0.00% | +23,672 | New |
| Parallax Volatility Advisers, L.P. | 15,000 | $9.00K | 0.00% | −10,000−40.0% | Reduced |
| Highbridge Capital Management LLC | – | $320 | 0.00% | – | – |
| UBS Group AG | 7 | $4 | 0.00% | +7 | New |
| Sculptor Capital LP | 0 | $0 | 0.00% | −250,000−100.0% | Sold out |
| Clear Street LLC | – | – | – | – | Not filed |