PERIMETER ACQUISITION CORP I PMTR
COM CL A · Common Stock · CUSIP G7010A129
- SectorBlank check (SPAC)
- IndustryBlank Checks
- HeadquartersDallas, TX
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $10.42.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2025 | 26 |
| Q3 2025 | 43 |
| Q4 2025 | 53 |
| Q1 2026 | 52 |
| Q2 2026 | 56 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2025 | 22 | 7 |
| Q4 2025 | 19 | 15 |
| Q1 2026 | 17 | 19 |
| Q2 2026 | 14 | 13 |
Biggest buyers
| Meteora Capital, LLC | Added | +207.2k |
| Radcliffe Capital Management, L.P. | Added | +183.0k |
| Verition Fund Management LLC | New | +159.0k |
| BOOTHBAY FUND MANAGEMENT, LLC | New | +105.3k |
| Centiva Capital, LP | Added | +71.4k |
| Shay Capital LLC | New | +49.8k |
| StoneX Group Inc. | Added | +30.3k |
| Parallax Volatility Advisers, L.P. | New | +25.0k |
| Schonfeld Strategic Advisors LLC | Added | +20.4k |
| Periscope Capital Inc. | Added | +4.7k |
Biggest sellers
| TORONTO DOMINION BANK | Reduced | -309.4k |
| Saba Capital Management, L.P. | Reduced | -154.9k |
| JPMORGAN CHASE & CO | Reduced | -53.4k |
| Lineage Point Capital LP | Reduced | -33.4k |
| CSS LLC/IL | Reduced | -28.4k |
| Shaolin Capital Management LLC | Reduced | -25.3k |
| Virtu Financial LLC | Reduced | -24.9k |
| CITIGROUP INC | Reduced | -21.9k |
| PenderFund Capital Management Ltd. | Sold out | -8.0k |
| Clear Street Group Inc. | Reduced | -4.6k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Harraden Circle Investments, LLC 13G · institution +0.6 pts · filed 2026-08-14 | 9.8% |
| Fort Baker Capital Management LP 13G · institution new · filed 2026-05-15 | 6.3% |
| Alberta Investment Management Corp 13G · passive investor new · filed 2025-05-19 | 6.1% |
| Magnetar Financial LLC 13G · institution new · filed 2025-08-08 | 6.0% |
Fell to 5% or below in the last year: HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (1.8%, 2026-02-13)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Harraden Circle Investments, LLC 3.24% of their portfolio | 2.4m $25.4m | Unchanged |
| Fort Baker Capital Management LP 1.30% of their portfolio | 1.6m $16.4m | Unchanged |
| Linden Advisors LP 0.08% of their portfolio | 1.5m $15.6m | Unchanged |
| Magnetar Financial LLC 0.14% of their portfolio | 1.5m $15.6m | Unchanged |
| Alberta Investment Management Corp 0.09% of their portfolio | 1.5m $15.6m | Unchanged |
| MOORE CAPITAL MANAGEMENT, LP 0.28% of their portfolio | 1.2m $12.5m | Unchanged |
| Governors Lane LP 1.17% of their portfolio | 1.1m $11.6m | Unchanged |
| Meteora Capital, LLC 0.78% of their portfolio | 905.4k $9.4m | Added +207.2k |
| Lineage Point Capital LP 1.50% of their portfolio | 700.0k $7.3m | Reduced -33.4k |
| Saba Capital Management, L.P. 0.21% of their portfolio | 649.9k $6.8m | Reduced -154.9k |
| TORONTO DOMINION BANK 0.01% of their portfolio | 600.1k $6.3m | Reduced -309.4k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 537.3k $5.6m | Unchanged |
| Radcliffe Capital Management, L.P. 0.41% of their portfolio | 521.5k $5.4m | Added +183.0k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 500.0k $5.2m | Unchanged |
| Sculptor Capital LP 0.05% of their portfolio | 500.0k $5.2m | Unchanged |
| Ghisallo Capital Management LLC 0.10% of their portfolio | 500.0k $5.2m | Unchanged |
| Centiva Capital, LP 0.14% of their portfolio | 409.4k $4.3m | Added +71.4k |
| GLAZER CAPITAL, LLC 0.10% of their portfolio | 379.9k $4.0m | Unchanged |
| HBK INVESTMENTS L P 0.04% of their portfolio | 360.0k $3.8m | Unchanged |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio | 350.0k $3.6m | Unchanged |
| Periscope Capital Inc. 0.54% of their portfolio | 327.8k $3.4m | Added +4.7k |
| PICTON MAHONEY ASSET MANAGEMENT 0.03% of their portfolio | 325.0k $3.4m | Unchanged |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 314.6k $3.3m | Unchanged |
| K2 PRINCIPAL FUND, L.P. 0.28% of their portfolio | 297.2k $3.1m | Unchanged |
| AQR Arbitrage LLC 0.04% of their portfolio | 285.8k $3.0m | Added +2.7k |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.01% of their portfolio | 252.8k $2.6m | Unchanged |
| Context Capital Management, LLC 0.05% of their portfolio | 250.0k $2.6m | Unchanged |
| Shaolin Capital Management LLC 0.13% of their portfolio | 225.0k $2.3m | Reduced -25.3k |
| DLD Asset Management, LP 0.17% of their portfolio | 199.4k $2.1m | Unchanged |
| Schonfeld Strategic Advisors LLC 0.01% of their portfolio | 160.4k $1.7m | Added +20.4k |
| CITIGROUP INC 0.00% of their portfolio | 160.0k $1.7m | Reduced -21.9k |
| Verition Fund Management LLC 0.01% of their portfolio | 159.0k $1.7m | New |
| ARISTEIA CAPITAL, L.L.C. 0.02% of their portfolio | 150.0k $1.6m | Unchanged |
| Westchester Capital Management, LLC 0.08% of their portfolio | 150.0k $1.6m | Unchanged |
| BERKLEY W R CORP 0.08% of their portfolio | 148.8k $1.5m | Unchanged |
| READYSTATE ASSET MANAGEMENT LP 0.06% of their portfolio | 139.4k $1.5m | Added +2.9k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio | 105.3k $1.1m | New |
| TENOR CAPITAL MANAGEMENT Co., L.P. 0.01% of their portfolio | 100.0k $1.0m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 98.3k $1.0m | Unchanged |
| SONA ASSET MANAGEMENT (US) LLC 0.03% of their portfolio | 83.0k $864.8k | Unchanged |
| StoneX Group Inc. 0.03% of their portfolio | 79.6k $821.8k | Added +30.3k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 76.6k $796.3k | Reduced -53.4k |
| HEIGHTS CAPITAL MANAGEMENT, INC 0.14% of their portfolio | 58.9k $613.4k | Unchanged |
| Shay Capital LLC 0.06% of their portfolio | 49.8k $518.4k | New |
| Walleye Capital LLC 0.00% of their portfolio | 34.9k $363.1k | Unchanged |
| Parallax Volatility Advisers, L.P. 0.01% of their portfolio | 25.0k $260.2k | New |
| SIH Partners, LLLP 0.01% of their portfolio | 23.0k $239.7k | Reduced -4.1k |
| CSS LLC/IL 0.01% of their portfolio | 19.8k $206.2k | Reduced -28.4k |
| Clear Street Group Inc. 0.00% of their portfolio | 19.3k $201.5k | Reduced -4.6k |
| FNY Investment Advisers, LLC 0.06% of their portfolio | 15.1k $157.0k | Unchanged |
| Virtu Financial LLC 0.00% of their portfolio | 14.5k $151.0k | Reduced -24.9k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 13.8k $143.6k | Added +2.9k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 11.3k $117.8k | Unchanged |
| Rangeley Capital, LLC 0.02% of their portfolio | 2.5k $26.1k | New |
| UBS Group AG 0.00% of their portfolio | 177 $1.8k | Reduced -423 |
| MORGAN STANLEY 0.00% of their portfolio | 47 $490 | Reduced -22 |