Perimeter Solutions (PRM) director reports multiple 2025 performance-based option vestings

Rhea-AI Filing Summary

Perimeter Solutions director Bernt G. Iversen II reported multiple stock option acquisitions related to performance-based vesting. On February 26, 2026, he acquired several tranches of stock options with rights to buy shares of common stock at a stated price of $0.00 per option in the table.

Footnotes explain these entries reflect vesting from prior option grants made between May 3, 2022 and December 23, 2025. Each grant vests in five equal annual installments based on the company meeting specified performance criteria for the relevant fiscal years, with 2025 performance either met or partially met, triggering vesting of portions ranging from 2,655 to 7,000 options per grant.

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^*

Iversen Bernt G II

(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)
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)	$27.84	02/26/2026		A		2,655(1)		02/26/2026	12/23/2035	Common Stock	2,655	$0	2,655	D
Stock Option (right to buy)	$11.8	02/26/2026		A		6,194(2)		02/26/2026	02/12/2035	Common Stock	6,194	$0	6,194	D
Stock Option (right to buy)	$5.23	02/26/2026		A		7,000(3)		02/26/2026	02/14/2034	Common Stock	7,000	$0	14,000	D
Stock Option (right to buy)	$8.88	02/26/2026		A		7,000(4)		02/26/2026	02/15/2033	Common Stock	7,000	$0	21,000	D
Stock Option (right to buy)	$5.5	02/26/2026		A		7,000(5)		02/26/2026	09/06/2033	Common Stock	7,000	$0	21,000	D
Stock Option (right to buy)	$10.13	02/26/2026		A		5,833(6)		02/26/2026	05/03/2032	Common Stock	5,833	$0	23,333	D

Explanation of Responses:

1. On December 23, 2025, the reporting person was granted an option to purchase 15,000 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, 2025, 2026, 2027, 2028 and 2029. The performance criteria for 2025 were partially met, resulting in the vesting of the option as to 2,655 shares of common stock.

2. On February 12, 2025, the reporting person was granted an option to purchase 35,000 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, 2025, 2026, 2027, 2028 and 2029. The performance criteria for 2025 were partially met, resulting in the vesting of the option as to 6,194 shares of common stock.

3. On February 14, 2024, the reporting person was granted an option to purchase 35,000 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, 2024, 2025, 2026, 2027 and 2028. The performance criteria for 2025 were met, resulting in the vesting of the option as to 7,000 shares of common stock.

4. On February 15, 2023, the reporting person was granted an option to purchase 35,000 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, 2023, 2024, 2025, 2026 and 2027. The performance criteria for 2025 were met, resulting in the vesting of the option as to 7,000 shares of common stock.

5. On September 6, 2023, the reporting person was granted an option to purchase 35,000 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, 2023, 2024, 2025, 2026 and 2027. The performance criteria for 2025 were met, resulting in the vesting of the option as to 7,000 shares of common stock.

6. On May 3, 2022, the reporting person was granted an option to purchase 29,167 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 5,833 shares of common stock.

Remarks:

	/s/ Noriko Yokozuka, as Attorney-in-Fact	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 transactions did Perimeter Solutions (PRM) report for Bernt G. Iversen II?

Perimeter Solutions reported that director Bernt G. Iversen II acquired several tranches of stock options on February 26, 2026. These derivative awards reflect vesting of earlier performance-based option grants tied to the company’s fiscal 2025 performance criteria across multiple grant dates.

Are the PRM Form 4 transactions insider buys or option vesting events?

The PRM Form 4 transactions represent stock option vesting, not open-market share purchases. Transaction code A and footnotes show portions of prior performance-based option grants became exercisable after fiscal 2025 criteria were met or partially met, resulting in option acquisition entries.

Which prior option grants to Bernt G. Iversen II are referenced in the PRM Form 4?

The Form 4 references option grants dated May 3, 2022; February 15, 2023; September 6, 2023; February 14, 2024; February 12, 2025; and December 23, 2025. Each grant covers tens of thousands of shares and vests in five annual installments based on performance.

How are the Perimeter Solutions (PRM) director’s options structured in this filing?

Each grant vests in five equal annual installments contingent on meeting performance criteria for specified fiscal years. For fiscal 2025, those criteria were either fully met or partially met, causing vesting of option portions such as 2,655, 5,833, 6,194, and 7,000 shares per grant.

What performance period triggered the stock option vesting in the PRM Form 4?

The vesting reported on February 26, 2026 is tied to fiscal year 2025 performance. Footnotes state that the issuer’s 2025 performance criteria were met or partially met for the various grants, causing specific numbers of options to vest under the multi-year schedules.

Does the PRM Form 4 show direct or indirect ownership for these options?

The Form 4 classifies all reported stock option holdings as direct ownership. Each transaction entry lists ownership as direct, with no indication in the footnotes of separate entities or indirect holding structures for these particular awards.