Perimeter Acquisition Corp. I
PMTRU- 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; 8 institutions reported holding it in 13F filings for Q2 2026, worth $7.51M 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
- 10
- −14 vs. Q2 2025
- Shares held
- 1.29M
- −4.86M (−79.0%) vs. Q2 2025
- Total value
- $13.4M
- −$51.1M (−79.3%) vs. Q2 2025
- New holders
- 2
- 0 more added
- Sold out
- 16
- 4 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 PMTRU 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 | 8 | $7.51M |
| Q1 2026 | 8 | $7.42M |
| Q4 2025 | 9 | $9.47M |
| Q3 2025 | 10 | $13.4M |
| Q2 2025 | 25 | $64.6M |
| 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 |
|---|---|---|---|---|---|
| HGC Investment Management Inc. | 388,400 | $4.00M | 0.97% | −38,000−8.9% | Reduced |
| LMR Partners LLP | 250,000 | $2.57M | 0.03% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 150,000 | $1.57M | 0.00% | −66,680−30.8% | Reduced |
| Westchester Capital Management, LLC | 150,000 | $1.57M | 0.08% | 00.0% | Unchanged |
| Millennium Management LLC | 149,357 | $1.54M | 0.00% | −460,643−75.5% | Reduced |
| Toronto Dominion Bank | 148,200 | $1.52M | 0.00% | +148,200 | New |
| Readystate Asset Management LP | 26,045 | $273.5K | 0.01% | −15,330−37.1% | Reduced |
| Parallax Volatility Advisers, L.P. | 15,478 | $159.3K | 0.00% | 00.0% | Unchanged |
| PenderFund Capital Management Ltd. | 10,000 | $105.0K | 0.02% | 00.0% | Unchanged |
| Clear Street Group Inc. | 4,527 | $46.6K | 0.00% | +4,527 | New |
| Moore Capital Management, LP | 0 | $0 | 0.00% | −1,200,000−100.0% | Sold out |
| Ghisallo Capital Management LLC | 0 | $0 | 0.00% | −500,000−100.0% | Sold out |
| HBK Investments L P | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| CNH Partners LLC | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| Picton Mahoney Asset Management | 0 | $0 | 0.00% | −325,000−100.0% | Sold out |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 0 | $0 | 0.00% | −300,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −250,000−100.0% | Sold out |
| DLD Asset Management, LP | 0 | $0 | 0.00% | −199,150−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Periscope Capital Inc. | 0 | $0 | 0.00% | −125,800−100.0% | Sold out |
| Radcliffe Capital Management, L.P. | 0 | $0 | 0.00% | −112,600−100.0% | Sold out |
| Tenor Capital Management Co., L.P. | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Bluefin Capital Management, LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Wealthspring Capital LLC | 0 | $0 | 0.00% | −97,900−100.0% | Sold out |
| Heights Capital Management, Inc | 0 | $0 | 0.00% | −71,307−100.0% | Sold out |
| CSS LLC | 0 | $0 | 0.00% | −50,000−100.0% | Sold out |
| Clear Street LLC | – | – | – | – | Not filed |