Who owns Perimeter Acquisition Corp. I Class A Ordinary Shares (PMTR)
Which tracked institutional funds hold PMTR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PMTR company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-14). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
7 tracked funds added or opened PMTR while 8 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
PMTR’s largest tracked holder by dollar value, Harraden Circle Investments, LLC, sizes it at 0.2% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in PMTR divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 50 tracked filers holding PMTR, 13 increased or opened the position and 18 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in PMTR between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 3
- Verition Fund Management LLC$2M
- BOOTHBAY FUND MANAGEMENT, LLC$1M
- Shay Capital LLC$518K
Full exits 4
- Harraden Circle Investments, LLC$25M
- METEORA CAPITAL, LLC$7M
- GLAZER CAPITAL, LLC$4M
- TENOR CAPITAL MANAGEMENT Co., L.P.$1M
Largest adds
- Radcliffe Capital Management, L.P.$2M
- Centiva Capital, LP$798K
- StoneX Group Inc.$316K
- Fort Baker Capital Management LP$252K
Largest trims
- TORONTO DOMINION BANK$3M
- Saba Capital Management, L.P.$1M
- JPMORGAN CHASE & CO$536K
- CSS LLC/IL$289K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Fort Baker Capital Management LP | 1,573,684 | $16M | 6.7% | 2026-Q2 |
| Alberta Investment Management Corp | 1,500,000 | $16M | 6.4% | 2026-Q2 |
| Magnetar Financial LLC | 1,500,000 | $16M | 6.4% | 2026-Q2 |
| Linden Advisors LP | 1,500,000 | $16M | 6.4% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP | 1,200,000 | $13M | 5.1% | 2026-Q2 |
| Governors Lane LP | 1,116,900 | $12M | 4.8% | 2026-Q2 |
| Lineage Point Capital LP trimmed | 700,000 | $7M | 3.0% | 2026-Q2 |
| Saba Capital Management, L.P. trimmed | 649,940 | $7M | 2.8% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 600,100 | $6M | 2.6% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP | 537,309 | $6M | 2.3% | 2026-Q2 |
| Radcliffe Capital Management, L.P. added | 521,525 | $5M | 2.2% | 2026-Q2 |
| Sculptor Capital LP | 500,000 | $5M | 2.1% | 2026-Q2 |
| Ghisallo Capital Management LLC | 500,000 | $5M | 2.1% | 2026-Q2 |
| D. E. Shaw & Co., Inc. | 500,000 | $5M | 2.1% | 2026-Q2 |
| Centiva Capital, LP added | 409,442 | $4M | 1.8% | 2026-Q2 |
| HBK INVESTMENTS L P | 360,000 | $4M | 1.5% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 350,000 | $4M | 1.5% | 2026-Q2 |
| Periscope Capital Inc. added | 327,836 | $3M | 1.4% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT | 325,000 | $3M | 1.4% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC | 314,650 | $3M | 1.3% | 2026-Q2 |
| K2 PRINCIPAL FUND, L.P. | 297,237 | $3M | 1.3% | 2026-Q2 |
| AQR Arbitrage LLC added | 285,795 | $3M | 1.2% | 2026-Q2 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 252,751 | $3M | 1.1% | 2026-Q2 |
| Context Capital Management, LLC | 250,000 | $3M | 1.1% | 2026-Q2 |
| Shaolin Capital Management LLC trimmed | 224,991 | $2M | 1.0% | 2026-Q2 |
| DLD Asset Management, LP | 199,351 | $2M | 0.9% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC added | 160,385 | $2M | 0.7% | 2026-Q2 |
| CITIGROUP INC trimmed | 160,000 | $2M | 0.7% | 2026-Q2 |
| Verition Fund Management LLC new | 159,004 | $2M | 0.7% | 2026-Q2 |
| ARISTEIA CAPITAL, L.L.C. | 150,000 | $2M | 0.6% | 2026-Q2 |
| Westchester Capital Management, LLC | 150,000 | $2M | 0.6% | 2026-Q2 |
| BERKLEY W R CORP | 148,830 | $2M | 0.6% | 2026-Q2 |
| READYSTATE ASSET MANAGEMENT LP added | 139,414 | $1M | 0.6% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 105,347 | $1M | 0.5% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC | 98,304 | $1M | 0.4% | 2026-Q2 |
| SONA ASSET MANAGEMENT (US) LLC | 82,991 | $865K | 0.4% | 2026-Q2 |
| StoneX Group Inc. added | 79,594 | $822K | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 76,566 | $796K | 0.3% | 2026-Q2 |
| HEIGHTS CAPITAL MANAGEMENT, INC | 58,925 | $613K | 0.3% | 2026-Q2 |
| Shay Capital LLC new | 49,800 | $518K | 0.2% | 2026-Q2 |
| Walleye Capital LLC | 34,882 | $363K | 0.1% | 2026-Q2 |
| Parallax Volatility Advisers, L.P. new | 25,000 | $260K | 0.1% | 2026-Q2 |
| SIH Partners, LLLP trimmed | 23,028 | $240K | 0.1% | 2026-Q2 |
| CSS LLC/IL trimmed | 19,791 | $206K | 0.1% | 2026-Q2 |
| Clear Street Group Inc. trimmed | 19,341 | $202K | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 13,792 | $144K | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 11,320 | $118K | 0.0% | 2026-Q2 |
| Rangeley Capital, LLC trimmed | 2,502 | $26K | 0.0% | 2026-Q2 |
| UBS Group AG trimmed | 177 | $2K | 0.0% | 2026-Q2 |
| MORGAN STANLEY trimmed | 47 | $490 | 0.0% | 2026-Q2 |
| Harraden Circle Investments, LLC added | 2,440,298 | $25M | 10.3% | 2026-Q1 stale (1 quarter behind) |
| METEORA CAPITAL, LLC trimmed | 698,202 | $7M | 2.9% | 2026-Q1 stale (1 quarter behind) |
| GLAZER CAPITAL, LLC added | 379,931 | $4M | 1.6% | 2026-Q1 stale (1 quarter behind) |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 100,000 | $1M | 0.4% | 2026-Q1 stale (1 quarter behind) |
| Virtu Financial LLC new | 39,387 | $404K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| FNY Investment Advisers, LLC | 15,110 | $154K | 0.1% | 2026-Q1 stale (1 quarter behind) |
| PenderFund Capital Management Ltd. | 8,000 | $82K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| HGC Investment Management Inc. new | 238,400 | $2M | 1.0% | 2025-Q4 stale (2 quarters behind) |
| FIFTH LANE CAPITAL, LP new | 125,000 | $1M | 0.5% | 2025-Q4 stale (2 quarters behind) |
| MIZUHO SECURITIES USA LLC trimmed | 99,465 | $1M | 0.4% | 2025-Q4 stale (2 quarters behind) |
| Wealthspring Capital LLC | 97,900 | $1M | 0.4% | 2025-Q4 stale (2 quarters behind) |
| Alpine Global Management, LLC new | 84,057 | $864K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| Marex Group plc new | 13,800 | $142K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| BlueCrest Capital Management Ltd new | 10,000 | $103K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Lighthouse Investment Partners, LLC new | 750,000 | $8M | 3.1% | 2025-Q2 stale (4 quarters behind) |
| CLEAR STREET LLC new | 56,306 | $573K | 0.2% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. new | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.