Perimeter Solutions, Inc.

12. FAIR VALUE MEASUREMENTS

Fair Value Measurement

The carrying value of cash and cash equivalents, short-term investments, accounts receivable, accounts payable, accrued expenses and other current liabilities approximates fair value due to the short-term nature of their maturities. Borrowings under the Company’s Amended and Restated Revolving Credit Facility accrue interest at a floating rate tied to a standard short-term borrowing index, selected at the Company’s option, plus an applicable margin. The carrying amount of this floating rate debt approximates fair value based upon the respective interest rates adjusting with market rate adjustments. The carrying amount of the Company's Preferred Stock equals the redemption price, which approximates fair value. At March 31, 2026 and December 31, 2025, the estimated fair value of the Company's 2029 Notes, calculated using Level 2 inputs, based on bid prices obtained from a broker was approximately $656.8 million and $669.4 million, respectively. At March 31, 2026, the estimated fair value of the Company’s 2034 Notes, calculated using Level 2 inputs, based on bid prices obtained from a broker was approximately $539.0 million.

The Company uses valuation approaches that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company determines fair value based on assumptions that market participants would use in pricing an asset or a liability in the principal or most advantageous market. When considering market participant assumptions in fair value measurements, the following fair value hierarchy distinguishes between observable and unobservable inputs, which are categorized in one of the following levels:

•Level 1 inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

•Level 2 inputs: Other than quoted prices in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

•Level 3 inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.

Liabilities by Hierarchy Level

The following table sets forth the Company’s liabilities that were measured at fair value on a recurring basis, by level, within the fair value hierarchy as of March 31, 2026 and December 31, 2025 (in thousands):

The fair value of the founders advisory fees payable - related party is based on the appreciation of the market price of shares if such market price exceeds certain trading price minimums at the end of each reporting period and is valued using a Monte Carlo simulation model, which requires the input of subjective assumptions, including the fair value of the underlying Common Stock, the risk-free interest rate, the expected equity volatility, and the expected term of the Founder Advisory Agreement. See Note 11, “Stock-Based Compensation” for discussion of the fair value estimation on the founders advisory fees payable - related party.

Changes in Level 3 Liabilities

The reconciliation for the portion of founders advisory fees payable - related party which is measured at fair value on a recurring basis using significant unobservable inputs (Level 3) is as follows (in thousands):