Perimeter Acquisition Corp. I
PMTR- 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; 56 institutions reported holding it in 13F filings for Q2 2026, worth $230.4M 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
- 43
- +19 vs. Q2 2025
- Shares held
- 21.8M
- +5.04M (+30.1%) vs. Q2 2025
- Total value
- $222.0M
- +$51.7M (+30.4%) vs. Q2 2025
- New holders
- 20
- 4 more added
- Sold out
- 1
- 6 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 PMTR 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 | 56 | $230.4M |
| Q1 2026 | 52 | $224.8M |
| Q4 2025 | 53 | $221.0M |
| Q3 2025 | 43 | $222.0M |
| Q2 2025 | 25 | $170.9M |
| 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 | 1,899,998 | $19.3M | 3.80% | 00.0% | Unchanged |
| Linden Advisors LP | 1,500,000 | $15.4M | 0.10% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 1,500,000 | $15.4M | 0.11% | 00.0% | Unchanged |
| Magnetar Financial LLC | 1,500,000 | $15.4M | 0.09% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 1,250,000 | $12.8M | 0.02% | −250,000−16.7% | Reduced |
| Toronto Dominion Bank | 1,206,314 | $12.3M | 0.02% | +1,206,314 | New |
| Meteora Capital, LLC | 1,202,619 | $12.2M | 1.30% | +157,596+15.1% | Added |
| Moore Capital Management, LP | 1,200,000 | $12.2M | 0.24% | +1,200,000 | New |
| Governors Lane LP | 1,167,000 | $11.9M | 1.64% | 00.0% | Unchanged |
| Saba Capital Management, L.P. | 1,055,870 | $10.7M | 0.35% | −2,822−0.3% | Reduced |
| Fort Baker Capital Management LP | 800,000 | $8.14M | 1.34% | 00.0% | Unchanged |
| Sculptor Capital LP | 660,249 | $6.71M | 0.09% | +160,249+32.0% | Added |
| Two Sigma Investments, LP | 537,309 | $5.46M | 0.01% | 00.0% | Unchanged |
| D. E. Shaw & Co., Inc. | 500,000 | $5.13M | 0.00% | 00.0% | Unchanged |
| Ghisallo Capital Management LLC | 500,000 | $5.13M | 0.17% | +500,000 | New |
| HBK Investments L P | 400,000 | $4.07M | 0.06% | +400,000 | New |
| Glazer Capital, LLC | 375,187 | $3.82M | 0.13% | −41,141−9.9% | Reduced |
| Periscope Capital Inc. | 365,000 | $3.71M | 0.90% | +160,600+78.6% | Added |
| Shaolin Capital Management LLC | 342,829 | $3.49M | 0.17% | −283,606−45.3% | Reduced |
| Picton Mahoney Asset Management | 325,000 | $3.31M | 0.04% | +325,000 | New |
| CNH Partners LLC | 301,692 | $3.09M | 0.08% | +301,692 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 300,000 | $3.05M | 0.02% | +300,000 | New |
| Millennium Management LLC | 298,000 | $3.03M | 0.00% | +298,000 | New |
| Centiva Capital, LP | 250,000 | $2.56M | 0.24% | +250,000 | New |
| K2 Principal Fund, L.P. | 247,237 | $2.51M | 0.26% | 00.0% | Unchanged |
| Radcliffe Capital Management, L.P. | 203,057 | $2.07M | 0.13% | +203,057 | New |
| Citigroup Inc | 200,000 | $2.05M | 0.00% | +200,000 | New |
| Context Capital Management, LLC | 200,000 | $2.03M | 0.06% | 00.0% | Unchanged |
| DLD Asset Management, LP | 199,150 | $2.03M | 0.26% | +199,150 | New |
| Aristeia Capital LLC | 150,000 | $1.53M | 0.05% | 00.0% | Unchanged |
| Berkley W R Corp | 148,830 | $1.51M | 0.10% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 126,825 | $1.29M | 0.01% | +126,825 | New |
| Mizuho Securities USA LLC | 122,530 | $1.24M | 0.03% | −4,404−3.5% | Reduced |
| Weiss Asset Management LP | 106,894 | $1.10M | 0.02% | −143,106−57.2% | Reduced |
| UBS Oconnor LLC | 100,000 | $1.02M | 0.03% | 00.0% | Unchanged |
| Tenor Capital Management Co., L.P. | 100,000 | $1.02M | 0.01% | +100,000 | New |
| Goldman Sachs Group Inc | 98,304 | $999.8K | 0.00% | +98,304 | New |
| Wealthspring Capital LLC | 97,900 | $995.6K | 0.24% | +97,900 | New |
| JPMorgan Chase & Co | 66,680 | $683.5K | 0.00% | +66,680 | New |
| Heights Capital Management, Inc | 58,925 | $604.0K | 0.19% | +58,925 | New |
| Clear Street Group Inc. | 55,806 | $567.5K | 0.00% | +55,806 | New |
| CSS LLC | 50,000 | $508.5K | 0.03% | +50,000 | New |
| Morgan Stanley | 71 | $722 | 0.00% | +15+26.8% | Added |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −750,000−100.0% | Sold out |
| Clear Street LLC | – | – | – | – | Not filed |