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 |
|---|---|---|---|---|---|
| Morgan Stanley | 71 | $722 | 0.00% | +15+26.8% | Added |
| CSS LLC | 50,000 | $508.5K | 0.03% | +50,000 | New |
| Clear Street Group Inc. | 55,806 | $567.5K | 0.00% | +55,806 | New |
| Heights Capital Management, Inc | 58,925 | $604.0K | 0.19% | +58,925 | New |
| JPMorgan Chase & Co | 66,680 | $683.5K | 0.00% | +66,680 | New |
| Wealthspring Capital LLC | 97,900 | $995.6K | 0.24% | +97,900 | New |
| Goldman Sachs Group Inc | 98,304 | $999.8K | 0.00% | +98,304 | New |
| Tenor Capital Management Co., L.P. | 100,000 | $1.02M | 0.01% | +100,000 | New |
| UBS Oconnor LLC | 100,000 | $1.02M | 0.03% | 00.0% | Unchanged |
| Weiss Asset Management LP | 106,894 | $1.10M | 0.02% | −143,106−57.2% | Reduced |
| Mizuho Securities USA LLC | 122,530 | $1.24M | 0.03% | −4,404−3.5% | Reduced |
| Schonfeld Strategic Advisors LLC | 126,825 | $1.29M | 0.01% | +126,825 | New |
| Berkley W R Corp | 148,830 | $1.51M | 0.10% | 00.0% | Unchanged |
| Aristeia Capital LLC | 150,000 | $1.53M | 0.05% | 00.0% | Unchanged |
| DLD Asset Management, LP | 199,150 | $2.03M | 0.26% | +199,150 | New |
| Context Capital Management, LLC | 200,000 | $2.03M | 0.06% | 00.0% | Unchanged |
| Citigroup Inc | 200,000 | $2.05M | 0.00% | +200,000 | New |
| Radcliffe Capital Management, L.P. | 203,057 | $2.07M | 0.13% | +203,057 | New |
| K2 Principal Fund, L.P. | 247,237 | $2.51M | 0.26% | 00.0% | Unchanged |
| Centiva Capital, LP | 250,000 | $2.56M | 0.24% | +250,000 | New |
| Millennium Management LLC | 298,000 | $3.03M | 0.00% | +298,000 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 300,000 | $3.05M | 0.02% | +300,000 | New |
| CNH Partners LLC | 301,692 | $3.09M | 0.08% | +301,692 | New |
| Picton Mahoney Asset Management | 325,000 | $3.31M | 0.04% | +325,000 | New |
| Shaolin Capital Management LLC | 342,829 | $3.49M | 0.17% | −283,606−45.3% | Reduced |
| Periscope Capital Inc. | 365,000 | $3.71M | 0.90% | +160,600+78.6% | Added |
| Glazer Capital, LLC | 375,187 | $3.82M | 0.13% | −41,141−9.9% | Reduced |
| HBK Investments L P | 400,000 | $4.07M | 0.06% | +400,000 | New |
| 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 |
| Two Sigma Investments, LP | 537,309 | $5.46M | 0.01% | 00.0% | Unchanged |
| Sculptor Capital LP | 660,249 | $6.71M | 0.09% | +160,249+32.0% | Added |
| Fort Baker Capital Management LP | 800,000 | $8.14M | 1.34% | 00.0% | Unchanged |
| Saba Capital Management, L.P. | 1,055,870 | $10.7M | 0.35% | −2,822−0.3% | Reduced |
| Governors Lane LP | 1,167,000 | $11.9M | 1.64% | 00.0% | Unchanged |
| Moore Capital Management, LP | 1,200,000 | $12.2M | 0.24% | +1,200,000 | New |
| Meteora Capital, LLC | 1,202,619 | $12.2M | 1.30% | +157,596+15.1% | Added |
| Toronto Dominion Bank | 1,206,314 | $12.3M | 0.02% | +1,206,314 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 1,250,000 | $12.8M | 0.02% | −250,000−16.7% | Reduced |
| 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 |
| Harraden Circle Investments, LLC | 1,899,998 | $19.3M | 3.80% | 00.0% | Unchanged |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −750,000−100.0% | Sold out |
| Clear Street LLC | – | – | – | – | Not filed |