Perimeter Solutions

PRM · NYSE

$27.07+$0.72 (+2.73%)TodayMarket closed · Oct 20, 7:30 PM ET

Prev close $26.35

Who owns PRM

Largest institutional holders, from their latest 13F filings

The 10 largest institutions hold 49.4% of PRM’s shares.

The WindAcre Partnership LLC9.9%
Principal Global Investors (Equity)8.6%
BlackRock Institutional Trust Company, N.A.6.5%
Thorndike (William N. Jr.)5.6%
Next 6 largest institutions18.9%
All other shareholders50.6%

Top institutional holders of PRM
Holder	Shares	% of shares	Change, last filing	Filed
The WindAcre Partnership LLC	16.15M	9.90%	−5.71M	Jun 30, 2026
Principal Global Investors (Equity)	14.01M	8.59%	+1.49M	Jun 30, 2026
BlackRock Institutional Trust Company, N.A.	10.55M	6.46%	+1.26M	Jun 30, 2026
Thorndike (William N. Jr.)	9.13M	5.59%	+5.52M	Apr 7, 2026
Fidelity Management & Research Company LLC	7.89M	4.84%	+518.00K	Jun 30, 2026
Vanguard Capital Management, LLC	6.59M	4.04%	+411.66K	Jun 30, 2026
Dimensional Fund Advisors, L.P.	4.32M	2.65%	−447.72K	Jun 30, 2026
Geode Capital Management, L.L.C.	4.23M	2.59%	+433.92K	Jun 30, 2026
Janus Henderson Investors	4.13M	2.53%	+118.44K	Jun 30, 2026
State Street Investment Management (US)	3.61M	2.21%	+367.28K	Jun 30, 2026

Largest mutual fund holders

Top mutual fund holders of PRM
Holder	Shares	% of shares	Change, last filing	Filed
Principal MidCap Fund	9.39M	5.76%	+238.19K	Jul 31, 2026
Vanguard Total Stock Market Index Fund	4.68M	2.87%	+15.03K	Jul 31, 2026
iShares Russell 2000 ETF	3.91M	2.40%	+6.64K	Jul 31, 2026
Janus Henderson Venture Fund	2.22M	1.36%	+141.35K	Jun 30, 2026
Fidelity Low-Priced Stock Fund	2.21M	1.35%	−268.80K	Jun 30, 2026

Insider trades

Form 4 filings by officers, directors and large holders

Over the last 6 months, insiders sold $217.46M (19 trades) of PRM on the open market, with no buys.

Latest PRM insider transactions
Insider	Date	Type	Shares	Price	Value
WINDACRE PARTNERSHIP LLC	Jun 30, 2026	Sale	1.88M	$33.90	$63.56M
WINDACRE PARTNERSHIP LLC	Jun 29, 2026	Sale	437.50K	$33.00	$14.44M
WINDACRE PARTNERSHIP LLC	Jun 26, 2026	Sale	548.48K	$34.51	$18.93M
WINDACRE PARTNERSHIP LLC	Jun 26, 2026	Sale	20.00K	$36.25	$725.00K
WINDACRE PARTNERSHIP LLC	Jun 26, 2026	Sale	2.30M	$34.40	$79.00M
WINDACRE PARTNERSHIP LLC	Jun 26, 2026	Sale	150.00K	$34.98	$5.25M
WINDACRE PARTNERSHIP LLC	Jun 26, 2026	Sale	378.60K	$36.22	$13.71M
Khouri Haitham	May 22, 2026	Sale	117.51K	$31.19	$3.67M
Khouri Haitham	May 21, 2026	Sale	91.72K	$31.91	$2.93M
Khouri Haitham	May 20, 2026	Sale	20.30K	$34.09	$692.03K

Short interest

Settled Sep 30, 2026

Shares short: 6.54M
Days to cover: 4.30
% of shares outstanding: 4.01%
Average daily volume: 1.52M
Change since last report: −6.6%

Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.