Insider sale notice — Perimeter Solutions (NYSE: PRM) reports 20,300-share disposition

Rhea-AI Filing Summary

Perimeter Solutions filed a Form 144 notice reporting a proposed sale of 20,300 shares of Class A Common stock by Haitham Khouri. The shares were recorded as sold on 05/20/2026; the holding shows an acquisition from the issuer in a private transaction on 03/02/2026.

Insights

Securities Compliance Counsel

Form 144 notice for an insider sale of 20,300 Class A shares.

The filing lists a proposed disposition of 20,300 shares by Haitham Khouri with a sale date shown as 05/20/2026. It also records the shares as acquired from the issuer in a private transaction on 03/02/2026.

The notice is procedural: it signals a planned resale under Section 144 requirements. Cash‑flow treatment and method of sale are not stated in the excerpt; subsequent transaction-level filings (e.g., Form 4) or broker reports would show execution details.

Key Figures

Shares reported sold: 20,300 shares Acquisition date: 03/02/2026 Security identifier: 91724

3 metrics

Shares reported sold 20,300 shares Sale date listed as 05/20/2026

Acquisition date 03/02/2026 Acquired from issuer in private transaction

Security identifier 91724 Identifier listed with Class A Common entry

Key Terms

Form 144, private transaction, Class A Common

3 terms

Form 144 regulatory

"filed a Form 144 notice reporting a proposed sale of 20,300 shares"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

private transaction financial

"Acquired from issuer in private transaction"

A private transaction is the sale or transfer of securities, assets, or ownership stakes carried out directly between a small number of parties rather than on a public exchange. For investors it matters because these deals are less visible and often less liquid than public trades, so pricing can be harder to verify, the investment can be harder to sell quickly, and buyers or sellers may gain strategic advantages not available in open markets — like negotiated terms similar to a private garage sale versus a crowded marketplace.

Class A Common financial

"Class A Common | 03/02/2026 | Acquired from issuer in private transaction"

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A Common	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	91724	2880133.6	163127063	05/21/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A Common	03/02/2026	Acquired from issuer in private transaction	PERIMETER SOLUTIONS, INC. CMN			91724	03/02/2026	None

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Haitham Khouri 8000 Maryland Avenue Suite 350 Clayton MO 63105	Class A Common	05/20/2026	20300	692067.6

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Perimeter Solutions' Form 144 (PRM) disclose?

The filing discloses a proposed sale of 20,300 shares of Class A Common by Haitham Khouri, with a sale date shown as 05/20/2026. It notes the shares were acquired in a private transaction on 03/02/2026.

Who is the reporting person on the Form 144 for PRM?

The reporting person is listed as Haitham Khouri, with an address at 8000 Maryland Avenue, Suite 350, Clayton, MO. The form shows his proposed disposition of 20,300 shares.

Does the Form 144 state how the shares were acquired?

Yes. The filing states the Class A Common shares were "Acquired from issuer in private transaction" on 03/02/2026. No purchase price is provided in the excerpt.

Is the sale on Form 144 already executed?

Form 144 is a notice of a proposed sale; the excerpt shows a sale date of 05/20/2026 but does not confirm execution. Completion details would appear in subsequent transaction filings or broker records.

What identifier appears for the security on this Form 144?

The excerpt lists a numeric identifier 91724 alongside the Class A Common entry. The filing also references the exchange as NYSE and a date 05/21/2026.