Perimeter Solutions (PRM) director reports gift of 673,685 shares to 501(c)(3)

Rhea-AI Filing Summary

Perimeter Solutions, Inc. director reported a charitable stock transfer. On 12/09/2025, the reporting person gifted 673,685 shares of Perimeter Solutions common stock to a 501(c)(3) nonprofit organization in an exempt transaction under Rule 16b-5 of the Securities Exchange Act of 1934. The transaction price is listed as $0 because it was a gift, not a sale. Following this transaction, the director beneficially owns 3,603,164 shares of Perimeter Solutions common stock directly.

Insider Trade Summary

673,685 shares gifted

Mixed 1 txn

Insider Thorndike William N Jr

Role Director

Type	Security	Shares	Price	Value
Gift	Common Stock	673,685	$0.00	--

Holdings After Transaction: Common Stock — 3,603,164 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Thorndike William N Jr

(Last) (First) (Middle)

C/O PERIMETER SOLUTIONS, INC.

8000 MARYLAND AVE., SUITE 350

(Street)

CLAYTON MO 63105

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Perimeter Solutions, Inc. [ PRM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/09/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/09/2025		G(1)		673,685	D	$0	3,603,164	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The Reporting Person gifted these shares to a 501(c)(3) nonprofit organization in an exempt transaction pursuant to Rule 16b-5 of the Securities Exchange Act of 1934, as amended.

Remarks:

	/s/ Noriko Yokozuka, as Attorney-in-Fact	12/11/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Perimeter Solutions (PRM) report in this Form 4?

A Perimeter Solutions, Inc. director reported gifting 673,685 shares of common stock on 12/09/2025 to a 501(c)(3) nonprofit organization.

Was the Perimeter Solutions (PRM) insider stock transfer a sale or a gift?

The filing states that the reporting person gifted 673,685 shares of Perimeter Solutions common stock to a 501(c)(3) nonprofit organization, and the transaction price is shown as $0.

How many Perimeter Solutions (PRM) shares does the insider own after the reported transaction?

After the reported gift, the director beneficially owns 3,603,164 shares of Perimeter Solutions common stock, held directly.

What exemption applies to the Perimeter Solutions (PRM) insider gift transaction?

The transaction is described as an exempt transaction under Rule 16b-5 of the Securities Exchange Act of 1934, relating to gifts of securities.

What is the relationship of the reporting person to Perimeter Solutions (PRM)?

The reporting person is identified as a Director of Perimeter Solutions, Inc.

Is the Perimeter Solutions (PRM) Form 4 filed by one or multiple reporting persons?

The form is marked as filed by one reporting person, not a group filing.