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, Q1 2026
Institutional positions in Perimeter Acquisition Corp. I as of Mar 31, 2026. 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
- 52
- −1 vs. Q4 2025
- Shares held
- 21.9M
- +425.7K (+2.0%) vs. Q4 2025
- Total value
- $224.8M
- +$3.87M (+1.8%) vs. Q4 2025
- New holders
- 7
- 10 more added
- Sold out
- 8
- 11 more reduced
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Perimeter Acquisition Corp. I; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 2,440,298 | $25.0M | 5.02% | +139,800+6.1% | Added |
| Fort Baker Capital Management LP | 1,573,684 | $16.1M | 1.43% | +773,684+96.7% | Added |
| Linden Advisors LP | 1,500,000 | $15.4M | 0.09% | 00.0% | Unchanged |
| Magnetar Financial LLC | 1,500,000 | $15.4M | 0.16% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 1,500,000 | $15.4M | 0.09% | 00.0% | Unchanged |
| Moore Capital Management, LP | 1,200,000 | $12.3M | 0.45% | 00.0% | Unchanged |
| Governors Lane LP | 1,116,900 | $11.5M | 1.43% | 00.0% | Unchanged |
| Toronto Dominion Bank | 909,456 | $9.33M | 0.02% | −85,544−8.6% | Reduced |
| Saba Capital Management, L.P. | 804,878 | $8.26M | 0.26% | −250,992−23.8% | Reduced |
| Lineage Point Capital LP | 733,364 | $7.52M | 1.84% | +202,407+38.1% | Added |
| Meteora Capital, LLC | 698,202 | $7.16M | 0.53% | −23,516−3.3% | Reduced |
| Two Sigma Investments, LP | 537,309 | $5.51M | 0.00% | 00.0% | Unchanged |
| Sculptor Capital LP | 500,000 | $5.13M | 0.06% | 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 | 0.14% | 00.0% | Unchanged |
| Glazer Capital, LLC | 379,931 | $3.90M | 0.08% | +28,316+8.1% | Added |
| HBK Investments L P | 360,000 | $3.69M | 0.05% | 00.0% | Unchanged |
| Healthcare of Ontario Pension Plan Trust Fund | 350,000 | $3.59M | 0.01% | −100,000−22.2% | Reduced |
| Radcliffe Capital Management, L.P. | 338,534 | $3.47M | 0.26% | +61,561+22.2% | Added |
| Centiva Capital, LP | 338,000 | $3.46M | 0.16% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 325,000 | $3.33M | 0.03% | 00.0% | Unchanged |
| Periscope Capital Inc. | 323,103 | $3.32M | 0.58% | +200+0.1% | Added |
| Millennium Management LLC | 314,650 | $3.23M | 0.00% | +16,929+5.7% | Added |
| K2 Principal Fund, L.P. | 297,237 | $3.05M | 0.32% | 00.0% | Unchanged |
| CNH Partners LLC | 283,119 | $2.90M | 0.05% | −18,573−6.2% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 252,751 | $2.59M | 0.01% | −20,156−7.4% | Reduced |
| Shaolin Capital Management LLC | 250,256 | $2.57M | 0.11% | +20,000+8.7% | Added |
| Context Capital Management, LLC | 250,000 | $2.56M | 0.06% | 00.0% | Unchanged |
| DLD Asset Management, LP | 199,351 | $2.05M | 0.21% | 00.0% | Unchanged |
| Citigroup Inc | 181,946 | $1.86M | 0.00% | 00.0% | Unchanged |
| Aristeia Capital LLC | 150,000 | $1.54M | 0.04% | 00.0% | Unchanged |
| Westchester Capital Management, LLC | 150,000 | $1.54M | 0.07% | +150,000 | New |
| Berkley W R Corp | 148,830 | $1.53M | 0.08% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 140,000 | $1.44M | 0.01% | −2,507−1.8% | Reduced |
| Readystate Asset Management LP | 136,526 | $1.40M | 0.08% | +42,601+45.4% | Added |
| JPMorgan Chase & Co | 129,992 | $1.33M | 0.00% | +13,444+11.5% | Added |
| Tenor Capital Management Co., L.P. | 100,000 | $1.03M | 0.02% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 98,304 | $1.01M | 0.00% | 00.0% | Unchanged |
| Sona Asset Management (US) LLC | 82,991 | $851.5K | 0.03% | +82,991 | New |
| Heights Capital Management, Inc | 58,925 | $604.0K | 0.17% | 00.0% | Unchanged |
| StoneX Group Inc. | 49,321 | $506.0K | 0.03% | +49,321 | New |
| CSS LLC | 48,235 | $494.9K | 0.03% | −1,765−3.5% | Reduced |
| Virtu Financial LLC | 39,387 | $404.0K | 0.02% | +39,387 | New |
| Walleye Capital LLC | 34,882 | $357.5K | 0.00% | 00.0% | Unchanged |
| SIH Partners, LLLP | 27,145 | $278.2K | 0.01% | −6,933−20.3% | Reduced |
| Clear Street Group Inc. | 23,941 | $245.6K | 0.00% | −29,165−54.9% | Reduced |
| FNY Investment Advisers, LLC | 15,110 | $154.0K | 0.07% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 11,320 | $116.0K | 0.00% | +11,320 | New |
| Citadel Advisors LLC | 10,940 | $112.1K | 0.00% | +10,940 | New |
| PenderFund Capital Management Ltd. | 8,000 | $82.0K | 0.01% | 00.0% | Unchanged |
| UBS Group AG | 600 | $6.16K | 0.00% | +600 | New |
| Morgan Stanley | 69 | $708 | 0.00% | −18−20.7% | Reduced |
| HGC Investment Management Inc. | 0 | $0 | 0.00% | −238,400−100.0% | Sold out |
| Fifth Lane Capital, LP | 0 | $0 | 0.00% | −125,000−100.0% | Sold out |
| Mizuho Securities USA LLC | 0 | $0 | 0.00% | −99,465−100.0% | Sold out |
| Wealthspring Capital LLC | 0 | $0 | 0.00% | −97,900−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −84,057−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −13,800−100.0% | Sold out |
| Rangeley Capital, LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| BlueCrest Capital Management Ltd | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |