Latest Period
Q1 2026
Security Snapshot
Perimeter Acquisition Corp. I - Class A Ordinary Shares, $0.0001 par value (PMTR) Institutional Ownership
CUSIP: G7010A129
13F Institutional Holders and Ownership History from Q2 2025 to Q1 2026
Institutions Reporting
52
Shares (Excl. Options)
21,922,487
Price
$10.26
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Class A Ordinary Shares, $0.0001 par value
- Symbol
- PMTR on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 21,922,487
- Total 13F value
- $224,848,032
- Portfolio coverage rank
- 0%
- Share change
- +414,390
- Value change
- +$4,249,968
- Number of holders
- 52
- Shares outstanding
- 24,979,111
- SEC-reported price per share
- $10.26
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- PMTR - Perimeter Acquisition Corp. I - Class A Ordinary Shares, $0.0001 par value is tracked under CUSIP G7010A129.
- 52 institutions reported positions in Q1 2026.
- 4 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 53 to 52 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $220,974,003 to $224,848,032.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 52 institutions filings for Q1 2026.
Security key
G7010A129
Latest holder period
Q1 2026
13F holders
52
13D/G owners
4
CIK / CUSIP context first
Open Q1 2026 holders
PMTR full holder history
Perimeter Acquisition Corp. I SEC filings
Perimeter Acquisition Corp. I company facts
Perimeter Acquisition Corp. I insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G7010A129:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
4
Security
PMTR
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 9.3% | $23,649,119 | 2,300,498 | Harraden Circle Investments, LLC | 31 Dec 2025 | |||
| Fort Baker Capital Management LP | 6.3% | $16,135,926 | 1,573,684 | Fort Baker Capital Management LP | 31 Mar 2026 | |||
| Magnetar Financial LLC | 6% | $15,195,000 | 1,500,000 | MAGNETAR FINANCIAL LLC | 30 Jun 2025 | |||
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.8% | -64% | $4,626,000 | -$8,224,000 | 450,000 | -64% | Healthcare of Ontario Pension Plan Trust Fund | 31 Dec 2025 |
As of 31 Mar 2026, 52 institutional investors reported holding 21,922,487 shares of Perimeter Acquisition Corp. I - Class A Ordinary Shares, $0.0001 par value (PMTR). This represents 88% of the company’s total 24,979,111 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
77%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC | 9.8% | 2,440,298 | +6.1% | 5% | $25,037,457 |
| Fort Baker Capital Management LP | 6.3% | 1,573,684 | +97% | 1.4% | $16,145,999 |
| Magnetar Financial LLC | 6% | 1,500,000 | 0% | 0.16% | $15,375,000 |
| Alberta Investment Management Corp | 6% | 1,500,000 | 0% | 0.09% | $15,375,000 |
| Linden Advisors LP | 6% | 1,500,000 | 0% | 0.09% | $15,375,000 |
| MOORE CAPITAL MANAGEMENT, LP | 4.8% | 1,200,000 | 0% | 0.45% | $12,312,000 |
| Governors Lane LP | 4.5% | 1,116,900 | 0% | 1.4% | $11,459,394 |
| TORONTO DOMINION BANK | 3.6% | 909,456 | -8.6% | 0.02% | $9,331,019 |
| Saba Capital Management, L.P. | 3.2% | 804,878 | -24% | 0.26% | $8,258,048 |
| Lineage Point Capital LP | 2.9% | 733,364 | +38% | 1.8% | $7,524,315 |
| METEORA CAPITAL, LLC | 2.8% | 698,202 | -3.3% | 0.53% | $7,163,553 |
| TWO SIGMA INVESTMENTS, LP | 2.2% | 537,309 | 0% | 0% | $5,512,790 |
| D. E. Shaw & Co., Inc. | 2% | 500,000 | 0% | 0% | $5,125,000 |
| Sculptor Capital LP | 2% | 500,000 | 0% | 0.06% | $5,130,000 |
| Ghisallo Capital Management LLC | 2% | 500,000 | 0% | 0.14% | $5,125,000 |
| GLAZER CAPITAL, LLC | 1.5% | 379,931 | +8.1% | 0.08% | $3,898,000 |
| HBK INVESTMENTS L P | 1.4% | 360,000 | 0% | 0.05% | $3,693,600 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 1.4% | 350,000 | -22% | 0.01% | $3,587,500 |
| Radcliffe Capital Management, L.P. | 1.4% | 338,534 | +22% | 0.26% | $3,473,359 |
| Centiva Capital, LP | 1.4% | 338,000 | 0% | 0.16% | $3,464,500 |
| PICTON MAHONEY ASSET MANAGEMENT | 1.3% | 325,000 | 0% | 0.03% | $3,331,250 |
| Periscope Capital Inc. | 1.3% | 323,103 | +0.06% | 0.58% | $3,315,037 |
| MILLENNIUM MANAGEMENT LLC | 1.3% | 314,650 | +5.7% | 0% | $3,228,309 |
| K2 PRINCIPAL FUND, L.P. | 1.2% | 297,237 | 0% | 0.46% | $3,049,652 |
| AQR Arbitrage LLC | 1.1% | 283,119 | -6.2% | 0.05% | $2,901,970 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
4
Latest
Q1 2026
Rows shown
1-4 of 4
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 21,922,487 | $224,848,032 | +$4,249,968 | $10.26 | 52 |
| 2025 Q4 | 21,496,777 | $220,974,003 | -$8,250,682 | $10.28 | 53 |
| 2025 Q3 | 21,828,201 | $222,622,902 | +$51,383,284 | $10.17 | 44 |
| 2025 Q2 | 16,784,548 | $170,864,471 | +$169,595,131 | $10.17 | 25 |