Perimeter Solutions (PRM) General Counsel gains 120,000 vested stock options

Rhea-AI Filing Summary

Perimeter Solutions, Inc. reported that General Counsel Noriko Yokozuka acquired 120,000 stock options through vesting of a previously granted award. These options relate to an option granted on November 8, 2021 to purchase 600,000 shares of common stock, which vests in five equal annual performance-based installments. The company states that its performance criteria for fiscal year 2025 were met, triggering vesting of the option with respect to 120,000 shares. Following this vesting event, Yokozuka now holds 360,000 stock options directly.

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
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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^*

Yokozuka Noriko

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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

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
Stock Option (right to buy)	$10	02/26/2026		A		120,000(1)		02/26/2026	11/08/2031	Common Stock	120,000	$0	360,000	D

Explanation of Responses:

1. On November 8, 2021, the reporting person was granted an option to purchase 600,000 shares of common stock. The option vests in five equal annual installments based on the Issuer's satisfaction of certain performance criteria for each of the fiscal years ending December 31, 2022, 2023, 2024, 2025 and 2026. The performance criteria for 2025 were met, resulting in the vesting of the option as to 120,000 shares of common stock.

Remarks:

	/s/ Noriko Yokozuka	03/02/2026
	** 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 for Noriko Yokozuka?

Perimeter Solutions reported that General Counsel Noriko Yokozuka acquired 120,000 stock options through vesting. These options are part of a larger 600,000-share option grant awarded in November 2021 and are tied to meeting specific annual performance criteria for the company.

How many Perimeter Solutions (PRM) stock options does Noriko Yokozuka hold after this Form 4?

After this transaction, Noriko Yokozuka directly holds 360,000 stock options in Perimeter Solutions. The latest 120,000 options vested when the company satisfied its 2025 performance criteria, adding to previously vested portions of the original 600,000-share option grant from November 2021.

What triggered the vesting of 120,000 PRM stock options for Noriko Yokozuka?

The vesting was triggered when Perimeter Solutions met its performance criteria for fiscal year 2025. Under the original November 8, 2021 grant, the 600,000-share option vests in five equal annual installments, each dependent on satisfying performance targets for specific fiscal years.

When was the original Perimeter Solutions (PRM) option grant to Noriko Yokozuka made?

The original stock option grant to Noriko Yokozuka was made on November 8, 2021. It covered options to purchase 600,000 shares of common stock, structured to vest in five equal annual installments based on the company meeting defined performance criteria for fiscal years 2022 through 2026.

How is Noriko Yokozuka’s PRM stock option grant structured over time?

The 600,000-share stock option grant is structured to vest in five equal annual installments of 120,000 shares each. Vesting for each tranche depends on Perimeter Solutions meeting specified performance criteria for fiscal years ending December 31, 2022, 2023, 2024, 2025 and 2026.

Does the latest PRM Form 4 involve an open-market stock purchase or sale?

The latest Form 4 does not report an open-market purchase or sale. It reflects the vesting and acquisition of 120,000 stock options from a 2021 performance-based grant, after Perimeter Solutions met its performance criteria for the fiscal year ending December 31, 2025.