PRM affiliate files Form 144 to sell 53,537 shares

Jeffrey Emery submitted a Section 144 notice to sell 53,537 shares of common stock on 05/13/2026 pursuant to an exercise of options under a registered plan.

Rhea-AI Filing Summary

Jeffrey Emery submitted a Section 144 notice to sell 53,537 shares of common stock on 05/13/2026 pursuant to an exercise of options under a registered plan. The filing lists Morgan Stanley Smith Barney LLC as the broker. It also documents prior dispositions of 99,963 shares on 05/11/2026 for $3,291,601.66 and 46,500 shares on 05/08/2026 for $1,488,088.35.

Insights

Corporate Governance Specialist

Form 144 records an affiliate's planned sale after option exercise and recent prior dispositions.

The filing shows an intended sale of 53,537 shares on 05/13/2026 described as the exercise of options under a registered plan, with Morgan Stanley Smith Barney LLC listed as the broker. This is a routine SEC notice used by affiliates when selling restricted or control securities.

Recent reported sales include $3,291,601.66 for 99,963 shares on 05/11/2026 and $1,488,088.35 for 46,500 shares on 05/08/2026. Subsequent filings will show actual sale completion and resulting holdings.

Key Figures

Shares to be sold: 53,537 shares Prior sale — 05/11/2026: 99,963 shares Prior sale — 05/08/2026: 46,500 shares

3 metrics

Shares to be sold 53,537 shares to be sold on 05/13/2026 after option exercise

Prior sale — 05/11/2026 99,963 shares proceeds reported as $3,291,601.66 on 05/11/2026

Prior sale — 05/08/2026 46,500 shares proceeds reported as $1,488,088.35 on 05/08/2026

Key Terms

Form 144, exercise of options under a registered plan, broker-dealer

3 terms

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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.

exercise of options under a registered plan financial

"Exercise of options under a registered plan | Issuer"

broker-dealer financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the PRM Form 144 disclose about shares to be sold?

The notice discloses an intended sale of 53,537 shares on 05/13/2026 described as the exercise of options under a registered plan. The broker is listed as Morgan Stanley Smith Barney LLC.

Who is the seller named in the PRM filing?

The seller named is Jeffrey Emery, with addresses shown in the filing. The filing identifies transactions linked to Emery on 05/08/2026 and 05/11/2026.

What prior sales by the reporting person are listed in the PRM filing?

The filing lists two recent dispositions: 46,500 shares on 05/08/2026 for $1,488,088.35 and 99,963 shares on 05/11/2026 for $3,291,601.66.

Was the 05/13/2026 sale associated with an option exercise?

Yes. The 05/13/2026 entry is labeled as an exercise of options under a registered plan, indicating the shares to be sold arise from option exercise activity.

Which broker-dealer is handling the proposed sale in the PRM filing?

The broker-dealer listed for the transactions is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 8th Floor, New York, NY, per the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/13/2026 - 04:36 PM Learn about SEC filing dates

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	0001926809
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	PERIMETER SOLUTIONS, INC.
SEC File Number	001-41027
Address of Issuer	8000 Maryland Avenue, Suite 350 Clayton MISSOURI 63105
Phone	(314) 396-7343
Name of Person for Whose Account the Securities are To Be Sold	JEFFREY EMERY
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	Officer

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
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	53537	1790641.33	163127063	05/13/2026	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 *
Common	05/13/2026	Exercise of options under a registered plan	Issuer			53537	05/13/2026	Cash

* 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
JEFFREY EMERY 8000 Maryland Avenue, Suite 350 Clayton MO 63105	Common	05/11/2026	99963	3291601.66
JEFFREY EMERY 8000 Maryland Avenue, Suite 350 Clayton MO 63105	Common	05/08/2026	46500	1488088.35

144: Remarks and Signature

Remarks
Date of Notice	05/13/2026
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	/s/ Jeffrey Emery
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)