Perimeter Acquisition Corp. I (PMTR) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

32,796,943Shares Outstanding

10,364,905Shares held by institutions

$107,484,065Value of institutional holdings

65.69%Institutional ownership %

0.80%Shares Changed QoQ

52No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 52 institutions have reported a stake in Perimeter Acquisition Corp. I (NASDAQ:PMTR) as of December 2025, according to recent 13F filings with the SEC.

These investors collectively held 65.7% of the company's total shares outstanding in December 2025, down from 66.6% in September 2025.
Institutional share ownership changed by 0.80% QoQ, while the number of institutional owners saw an unavailable change YoY.
Of these 52 institutional investors, 20 increased their holdings in Perimeter Acquisition Corp. I, while 15 of them reduced positions, and 17 investors maintained their exposure.
This class of investors increased its holdings in Perimeter Acquisition Corp. I to 21.54Mn shares for the 13F-cycle ending December 2025, up by 170.49K shares quarter on quarter, and down N/A shares year over year.
As of December 31, 2025, Harraden Circle Investments, LLC held Perimeter Acquisition Corp. I's largest shareholding position with over 2.30Mn shares, representing 7.01% of total outstanding shares.
Among the most significant buyers of Perimeter Acquisition Corp. I during December 2025 were Lineage Point Capital LP (875.98K), Harraden Circle Investments, LLC (400.50K), HGC Investment Management Inc. (238.40K), FIFTH LANE CAPITAL, LP (125.00K), READYSTATE ASSET MANAGEMENT LP (93.92K).
Leading sellers of Perimeter Acquisition Corp. I stock in December 2025 included HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (800.00K), METEORA CAPITAL, LLC (480.90K), TORONTO DOMINION BANK (211.31K), Sculptor Capital LP (160.25K), Shaolin Capital Management LLC (112.57K).
The top 10 institutional holders of Perimeter Acquisition Corp. I for the quarter ending December 2025 included Harraden Circle Investments, LLC (2.30Mn), LINDEN ADVISORS LP (1.50Mn), Magnetar Financial LLC (1.50Mn), Alberta Investment Management Corp (1.50Mn), MOORE CAPITAL MANAGEMENT, LP (1.20Mn), Governors Lane LP (1.12Mn), Saba Capital Management, L.P. (1.06Mn), TORONTO DOMINION BANK (995.00K), Lineage Point Capital LP (875.98K), Fort Baker Capital Management LP (800.00K).

52 Institutional Holders

10,364,905 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Harraden Circle Investments, LLC	31 Dec, 2025	2,300,498	400,500	21.08%	$23,649,119.00
LINDEN ADVISORS LP	31 Dec, 2025	1,500,000	0	0.00%	$15,420,000.00
Magnetar Financial LLC	31 Dec, 2025	1,500,000	0	0.00%	$15,420,000.00
Alberta Investment Management Corp	31 Dec, 2025	1,500,000	0	0.00%	$15,420,000.00
MOORE CAPITAL MANAGEMENT, LP	31 Dec, 2025	1,200,000	0	0.00%	$12,336,000.00
Governors Lane LP	31 Dec, 2025	1,116,900	-50,100	-4.29%	$11,481,732.00
Saba Capital Management, L.P.	31 Dec, 2025	1,055,870	0	0.00%	$10,854,344.00
TORONTO DOMINION BANK	31 Dec, 2025	995,000	-211,314	-17.52%	$10,228,600.00
Lineage Point Capital LP	31 Dec, 2025	875,977	875,977	0.00%	$9,005,044.00
Fort Baker Capital Management LP	31 Dec, 2025	800,000	0	0.00%	$8,224,000.00
METEORA CAPITAL, LLC	31 Dec, 2025	721,718	-480,901	-39.99%	$7,419,261.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	537,309	0	0.00%	$5,523,537.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	500,000	0	0.00%	$5,140,000.00
Sculptor Capital LP	31 Dec, 2025	500,000	-160,249	-24.27%	$5,140,000.00
Ghisallo Capital Management LLC	31 Dec, 2025	500,000	0	0.00%	$5,140,000.00
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	31 Dec, 2025	450,000	-800,000	-64.00%	$4,626,000.00
HBK INVESTMENTS L P	31 Dec, 2025	360,000	-40,000	-10.00%	$3,700,800.00
GLAZER CAPITAL, LLC	31 Dec, 2025	351,615	-23,572	-6.28%	$3,615.00
Centiva Capital, LP	31 Dec, 2025	338,000	88,000	35.20%	$3,474,640.00
PICTON MAHONEY ASSET MANAGEMENT	31 Dec, 2025	325,000	0	0.00%	$3,341,000.00

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