Perimeter Solutions, Inc. — Director's Dealing 2026

Mar 2, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Perimeter Solutions, Inc. (PRM)
CIK: 0001880319
Period of Report: 2026-02-26

Reporting Person: Khouri Haitham (Director, Chief Executive Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-26	Stock Option (right to buy)	$11.80	A	88489	Acquired	2035-02-12	Common Stock (88489)	Direct
2026-02-26	Stock Option (right to buy)	$5.23	A	100000	Acquired	2034-02-14	Common Stock (100000)	Direct
2026-02-26	Stock Option (right to buy)	$8.26	A	400000	Acquired	2033-03-08	Common Stock (400000)	Direct

Footnotes

F1: On February 12, 2025, the reporting person was granted an option to purchase 500,000 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 88,489 shares of common stock.

F2: On February 14, 2024, the reporting person was granted an option to purchase 500,000 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, 2026, 2026, 2027 and 2028. The performance criteria for 2025 were met, resulting in the vesting of the option as to 100,000 shares of common stock.

F3: On March 8, 2023, the reporting person was granted an option to purchase 2,000,000 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 400,000 shares of common stock.