Comparable stake leader
Harraden Circle Investments, LLC
SEC ownership of Perimeter Acquisition Corp. I
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002061473.
Disclosed value leader
Exor N.V.
Comparable rows
28/50
Latest evidence
31 Mar 2026
- Public ticker
- PMTR, PMTRU, PMTRW on Nasdaq
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Harraden Circle Investments, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
28 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Harraden Circle Investments, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002061473
- Issuer location
- Dallas, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Perimeter Acquisition Corp. I (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Harraden Circle Investmen...
Disclosed value leader
Exor N.V.
Comparable rows
28/50
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 9.3%
22 rows are not safely comparable across share classes.
13D/G row: Harraden Circle Investments, LLC
Showing 1-8 of 50 holder rows.
Quick read
Harraden Circle Investments, LLC leads the comparable SEC ownership view at 9.3%.
28 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Harraden Circle Investments, LLC's linked filing trail.
Comparable ownership
Top 5
Harraden Circle Investments, LLC
9.3%
Fort Baker Capital Management LP
6.3%
Alberta Investment Management Corp
6.1%
Linden Capital L.P.
6.1%
Magnetar Financial LLC
6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Harraden Circle Investments, LLC |
13F
13D/G
Company
|
9.3%
from 13D/G
|
$25,839,065
3,602,049 shares
mixed-class rows
|
— | 31 Mar 2026 |
| Fort Baker Capital Management LP |
13F
13D/G
Company
|
6.3%
from 13D/G
|
$16,329,641
1,839,833 shares
mixed-class rows
|
— | 31 Mar 2026 |
| Alberta Investment Management Corp |
13F
13D/G
Company
|
6.1%
from 13D/G
|
$15,892,500
2,250,000 shares
mixed-class rows
|
— | 31 Mar 2026 |
| Linden Capital L.P. |
13D/G
Linden Advisors LP
|
6.1%
|
—
1,500,000 shares
|
$0 | 14 May 2025 |
| Magnetar Financial LLC |
13F
13D/G
Company
|
6%
from 13D/G
|
$15,825,000
2,250,000 shares
mixed-class rows
|
— | 31 Mar 2026 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND |
13D/G
13F
Company
|
1.8%
|
$4,626,000
450,000 shares
|
-$8,224,000 | 31 Dec 2025 |
| Exor N.V. |
13F
Company
|
575%
|
$5,001,704,778
182,543,970 shares
|
— | 31 Mar 2026 |
| ORBIMED ADVISORS LLC |
13F
Company
|
20%
|
$22,079,801
6,210,899 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 09 Aug 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-9 of 9 reporting-owner rows connected to Perimeter Acquisition Corp. I. Open a relationship link for the CIK-to-CIK filing trail.
Rows
9
Largest Forms 3/4/5 holder
Sean Averell Pybus
Net 12M change
$0
Latest report
12 May 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sean Averell Pybus | Director | Mixed | 12 May 2025 | |||
| Jordan Andrew Blashek | Executive Chairman, Director, 10%+ Owner | Mixed | 12 May 2025 | |||
| M. Scott Faris | Director | Mixed | 12 May 2025 | |||
| Todd Lemkin | Chief Investment Officer | Mixed | 12 May 2025 | |||
| A. Scott Letier | Director | Mixed | 12 May 2025 | |||
| Perimeter Acquisition Sponsor LLC | 10%+ Owner | Mixed | 12 May 2025 | |||
| Jack Selby | Director | Mixed | 12 May 2025 | |||
| Josef Meir Valdman | Chief Executive Officer | Mixed | 12 May 2025 | |||
| Richard John Berthy | Director | Mixed | 12 May 2025 |
Recent insider transactions for Perimeter Acquisition Corp. I
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.