Perimeter Acquisition Corp. I Class A Ordinary Shares
Perimeter Acquisition Corp. I Class A Ordinary Shares (PMTR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PMTR · as of Sep 30, 2025
Ownership Breakdown
44
Institutional Holders
▲ 19 vs Q2
$222.02M
Total Inst. Value
▲ $51.15M vs Q2
24.79M
Shares Outstanding
freeFloat 97.68%
21.77M
13F Shares Held
▲ 4.98M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PMTR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ALBERTA INVESTMENT MANAGEMENT CORP blank checks | 1.50M | 8.06% | 8.06% | $15.38B | Feb 17, 2026 | — held |
HARRADEN CIRCLE INVESTMENTS, LLC blank checks | 1.90M | 7.67% | 7.67% | $19.32B | Nov 13, 2025 | — held |
MAGNETAR FINANCIAL LLC blank checks | 1.50M | 6.05% | 6.05% | $15.38B | Nov 13, 2025 | — held |
LINDEN ADVISORS LP blank checks | 1.50M | 6.05% | 6.05% | $15.38B | Nov 14, 2025 | — held |
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND blank checks | 1.25M | 5.04% | 5.04% | $12.81B | Nov 13, 2025 | ▼ 250.0K |
TORONTO DOMINION BANK blank checks | 1.21M | 4.87% | 4.87% | $12.27B | Nov 14, 2025 | NEW |
METEORA CAPITAL, LLC blank checks | 1.20M | 4.85% | 4.85% | $12.23B | Nov 17, 2025 | ▲ 157.6K |
MOORE CAPITAL MANAGEMENT, LP blank checks | 1.20M | 4.84% | 4.84% | $12.20B | Nov 14, 2025 | NEW |
GOVERNORS LANE LP blank checks | 1.17M | 4.71% | 4.71% | $11.87B | Nov 14, 2025 | — held |
SABA CAPITAL MANAGEMENT, L.P. blank checks | 1.06M | 4.26% | 4.26% | $10.74B | Nov 14, 2025 | ▼ 2.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
4
Increased
+478.5K shares21
New Positions
first time holders6
Decreased
−725.1K shares1
Sold Out
fully exitedNet shares change (top 50)
246.6K
+478.5K / −725.1K
Net new holders
+18
21 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PMTR insider trading · insider activity
Source: SEC Form 4
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
LEA GREGORY S EVP-Chief Financial Officer | Nov 3, 2005 | Award | 25,000 | $1.20 | $30.0K | 25.0K | Form 4 ↗ |
BOUTSIKARIS JOHN C Executive Vice President | Dec 15, 2004 | Award | 50,000 | $1.68 | $84.0K | 50.0K | Form 4 ↗ |
LEA GREGORY S EVP-Chief Financial Officer | Dec 15, 2004 | Award | 50,000 | $1.68 | $84.0K | 50.0K | Form 4 ↗ |
BOUTSIKARIS JOHN C Executive Vice President | Jul 12, 2004 | Award | 50,000 | $2.15 | $107.5K | 50.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Perimeter Acquisition Corp. I Class A Ordinary Shares (PMTR) is primarily owned by institutional investors, who hold approximately 87.8% of total shares outstanding. Company insiders own approximately 2.32%, while retail and public investors account for the remaining 9.86%.
The largest institutional shareholder of Perimeter Acquisition Corp. I Class A Ordinary Shares is ALBERTA INVESTMENT MANAGEMENT CORP, holding approximately 1.50 million shares — equal to 8.06% of outstanding shares — as of September 30, 2025.
A total of 44 institutional investors currently hold PMTR stock, with a combined institutional value of approximately $222,018,921 as of the most recent 13F filing period.
Frequently asked questions
PMTR ownershipPerimeter Acquisition Corp. I Class A Ordinary Shares (PMTR) is primarily owned by institutional investors, who hold approximately 87.8% of shares. The largest shareholder is ALBERTA INVESTMENT MANAGEMENT CORP with a 8.06% stake. Company insiders hold 2.32%. Data sourced from SEC Form 13F as of September 30, 2025.