Perimeter Solutions, Inc.

10b5-1 Trading Plans

During the three months ended March 31, 2026, none of our officers (as defined in Rule 16a-1(f) of the Exchange Act) or directors adopted orterminated a "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement," as each term is defined in Item 408(a) of Regulation S-K.

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(e)

As previously disclosed, the Company and Edward Goldberg agreed that Mr. Goldberg would no longer serve as Vice Chairman of the Company.

Separation and Release Agreement

Effective March 31, 2026 (the "Separation Date"), the Company entered into a Separation and Release Agreement and a related Consulting Agreement with Mr. Goldberg in connection with his departure from the Vice Chairman role and his transition to a consulting arrangement. The Separation and Release Agreement supersedes the severance provisions contained in Mr. Goldberg's employment agreement and any amendments thereto.

Pursuant to the Separation and Release Agreement, Mr. Goldberg is entitled to receive a total severance amount consisting of the following components: (a) $768,750, representing 1.25 times his annual base salary; (b) $307,500, representing one-half of his target bonus for fiscal year 2026; and (c) approximately $41,322, representing the cost of 19 months of COBRA continuation coverage. The aggregate severance amount is payable in substantially equal installments over the 15-month period following the Separation Date.

The Separation and Release Agreement includes a general release of claims by Mr. Goldberg in favor of the Company. Mr. Goldberg's existing obligations relating to non-competition, non-solicitation, confidentiality, and non-disparagement remain in full force and effect in accordance with their terms.

With respect to Mr. Goldberg's outstanding equity awards, the Separation and Release Agreement provides as follows: (i) 2,487,500 previously vested stock options remained vested and exercisable in accordance with their terms; (ii) 150,000 unvested performance-based stock options are retained and remain eligible to vest on December 31, 2026, subject to Mr. Goldberg's continued service under the Consulting Agreement through that date; and (iii) all other unvested stock options held by Mr. Goldberg were forfeited as of the Separation Date.

Consulting Agreement

Effective April 1, 2026, Mr. Goldberg transitioned to an independent contractor role pursuant to the Consulting Agreement, under which he provides advisory and other services to the Company.