Company · Ownership research

Perimeter Solutions, Inc. PRM

CIK 0001880319

Form 4 transactions dated Sep 1, 2023 to Sep 23, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 64 rows; the complete set is available through the API.

Insider filings on file run through 2026-06-30.

Insider purchases & sales

Purchased: $3.86M
Sold: $258.59M

Sep 1, 2023 – Jun 30, 2026
Available records · partial months are marked ·

202610 of 19 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-06-30	WINDACRE PARTNERSHIP LLC 10% owner	Sale	$63.56M 1,875,000 shares sold	10.40% sold Direct holding	▾
2026-06-29	WINDACRE PARTNERSHIP LLC 10% owner	Sale	$14.44M 437,500 shares sold	2.37% sold Direct holding	▾
2026-06-26	WINDACRE PARTNERSHIP LLC 10% owner	Sale	$117.61M 3,393,479 shares sold	15.53% sold Direct holding	▾
2026-05-22	Khouri Haitham Chief Executive Officer · Director	Sale	$3.67M 117,511 shares sold	5.90% sold Direct holding	▾
2026-05-21	Khouri Haitham Chief Executive Officer · Director	Sale	$2.93M 91,724 shares sold	4.40% sold Direct holding	▾
2026-05-20	Khouri Haitham Chief Executive Officer · Director	Sale	$692.03K 20,300 shares sold	0.96% sold Direct holding	▾
2026-05-13	Sable Kyle Chief Financial Officer	Sale	$1.64M 49,540 shares sold	100.00% sold Direct holding	▾
2026-05-13	Emery Jeffrey President - Global Fire Safety	Sale	$1.79M 53,537 shares sold	100.00% sold Direct holding	▾
2026-05-12	Sable Kyle Chief Financial Officer	Sale	$952.50K 30,000 shares sold	100.00% sold Direct holding	▾
2026-05-11	Sable Kyle Chief Financial Officer	Sale	$672.93K 20,460 shares sold	100.00% sold Direct holding	▾

Showing 19 / 19 record groups in 2026. The complete set is available through the API.

Perimeter Solutions, Inc. · PRM

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 19 of 19 purchase / sale groups and 30 of 64 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"PRM","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.