Khouri Haitham 4

4 · Perimeter Solutions, Inc. · Filed Mar 2, 2026

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Updated Mar 2, 2026

Perimeter Solutions (PRM) CEO Haitham Khouri Receives Awarded Shares

What Happened

Haitham Khouri, CEO of Perimeter Solutions (PRM), reported the vesting/acquisition of 588,489 shares of common stock on February 26, 2026. The filing shows three derivative awards converted to common shares: 88,489; 100,000; and 400,000 shares. Each acquisition is reported at $0.00 per share (award/vesting of previously granted options), so no cash purchase was reported on the Form 4.

Key Details

Transaction date: 2026-02-26; Transaction code: A (award/grant/acquisition of derivative securities); Reported price: $0.00 per share.
Total shares acquired: 588,489 common shares (88,489 + 100,000 + 400,000).
Filing date: 2026-03-02 — filed within the SEC’s two-business-day window (timely).
Post-transaction beneficial ownership: not specified in the provided data.
Footnotes (summary):
- F1: 2/12/2025 grant of 500,000-option award; 2025 performance partially met → 88,489 shares vested.
- F2: 2/14/2024 grant of 500,000-option award; 2025 performance met → 100,000 shares vested.
- F3: 3/8/2023 grant of 2,000,000-option award; 2025 performance met → 400,000 shares vested.

Context

These were performance-based option vestings (derivative securities converting to common stock) tied to multi-year performance criteria from prior grants; the Form 4 reports the vesting/acquisition rather than a cash purchase or market sale.
Vesting/awards reported at $0.00 do not mean no market value — they reflect that shares resulted from option vesting/awards rather than an open-market transaction. This type of filing documents compensation-related equity accruals rather than a directional insider buy or sell.

Form 4

Period: 2026-02-26

DirectorChief Executive Officer

Transactions

Award
Stock Option (right to buy)
[F1]
2026-02-26+88,489→ 88,489 total
Exercise: $11.80From: 2026-02-26Exp: 2035-02-12→ Common Stock (88,489 underlying)
Award
Stock Option (right to buy)
[F2]
2026-02-26+100,000→ 200,000 total
Exercise: $5.23From: 2026-02-26Exp: 2034-02-14→ Common Stock (100,000 underlying)
Award
Stock Option (right to buy)
[F3]
2026-02-26+400,000→ 1,200,000 total
Exercise: $8.26From: 2026-02-26Exp: 2033-03-08→ Common Stock (400,000 underlying)

Footnotes (3)

[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.

Signature

/s/ Noriko Yokozuka, as Attorney-in-Fact|2026-03-02

1 file