Perimeter Solutions SA

Evaluation of Disclosure Controls and Procedures

As required by Rule 13a-15(b) under the Exchange Act, PSSA has evaluated, under the supervision and with the participation of the Company’s management, including PSSA’s principal executive officer and principal financial officer, the effectiveness of the design and operation of its disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the fiscal year covered by this Annual Report. Based on such evaluation, PSSA’s principal executive officer and principal financial officer have concluded that the design and operation of our disclosure controls and procedures were effective as of December 31, 2023.

Management’s Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rule 13a‑15(f) under the Exchange Act. Under the supervision of our principal executive officer and principal financial officer, management conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2023, based on the guidelines established in Internal Control — Integrated Framework (2013 Framework) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2023.

BDO USA, P.C. the independent registered public accounting firm that audited the financial statements included in this Annual Report on Form 10-K, has provided an attestation report on PSSA’s internal control over financial reporting which is included in Part II, Item 8. “Financial Statements and Supplementary Data” in this Annual Report.

Remediation of Previously Reported Material Weaknesses

In connection with the evaluation of the Company’s internal control over financial reporting as described above, management disclosed the following material weakness in our control environment as of December 31, 2022:

•Failure to design and implement review controls at a sufficient level of precision over the consideration of key terms and conditions affecting grant date in accordance with ASC 718, Compensation — Stock Compensation, when accounting for performance-based stock.

•Failure to design and implement review controls at a sufficient level of precision around complex accounting areas and related disclosures, including business combinations and goodwill impairment assessment, specifically related to the determination of carrying value and review of valuation assumptions.

•Failure to design and implement controls over the business combination and its effects on the presentation of the statement of cash flows, equity issuance costs, and transaction costs and the judgments made in the determination of purchase consideration.

In response to the material weaknesses, and as previously disclosed in Item 9A of our annual report on Form 10-K for the year ended December 31, 2022, we implemented a remediation plan which included, but was not limited to, enhancing the precision of certain review controls as well as maintaining continuous oversight and driving accountability related to the execution of internal controls over financial reporting. The enhancements made to our control environment were in place as of December 31, 2023, and based on the evaluation of relevant internal controls, management has concluded that the material weaknesses previously identified have been remediated as of December 31, 2023.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended December 31, 2023 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting other than as described above.