9. Debt

As of December 31, 2023 and 2022, unamortized debt issuance costs was $4,030 and $5,729, respectively, and accumulated amortization of debt issuance costs was $6,145 and $4,446, respectively.

For the years ended December 31, 2023, 2022 and 2021, the amortization of debt issuance costs in interest expense, net in the consolidated statements of operations and comprehensive income (loss) was approximately $1,698, $1,698 and $1,155, respectively.

Credit Agreement

On August 21, 2014, we entered into a Credit Agreement (“Credit Agreement”) which was originally comprised of a term loan (“First Lien Term Loan”) and a revolving commitment (“Revolving Commitment”). The Credit Agreement was collateralized by substantially all personal property (including cash, inventory, property and equipment, and intangible assets), real property, and equity interests owned by us.

Under the First Lien Term Loan under the Credit Agreement, we had the option of selecting either (i) a Base Rate interest rate plus fixed margin of 2.25% or (ii) a Eurodollar (LIBOR) interest rate for one, two, three or six months plus a fixed margin of 3.25%.

Under the Revolving Commitment under the Credit Agreement, we had the option of selecting either (i) a Base Rate interest rate plus a variable margin of 2.50% to 3.00%, based on our First Lien Net Debt Leverage Ratio, or (ii) a Eurodollar (LIBOR) interest rate for one, two, three or six months plus a variable margin of 3.50% to 4.00%, based on our First Lien Net Leverage Ratio.

First Lien Term Loan

In February 2020, we entered into Amendment No. 1 to Amended and Restated First Lien Credit Agreement (“Amended First Lien Credit Agreement”) which amended and restated the Amended and Restated First Lien Credit Agreement entered into in May 2019 ("First Lien Credit Agreement"). The Amended First Lien Credit Agreement changed the interest rate spreads associated with the First Lien Credit Agreement where (i) the variable margin associated with the Base Rate interest rate plus a variable margin based on our First Lien Net Leverage Ratio changed from 2.25% to 2.50% to 2.00% to 2.25% and (ii) the variable margin associated with the Eurodollar Rate interest rate for one, two, three or six months plus a variable margin based on our First Lien Net Leverage Ratio changed from 3.25% to 3.50% to 3.00% to 3.25%.

In February 2020 and March 2020, we borrowed $30,000 and $10,000, respectively, under the delayed draw facility under the First Lien Term Loan, utilizing the full $40,000 available under the delayed draw facility. As a result of the additional borrowings under the delayed draw facility, the quarterly principal payments associated with the First Lien Term Loan increased from $2,000 to $2,100.

In June 2021, we made a voluntary prepayment of $190,400 of outstanding principal under the First Lien Term Loan funded by the net proceeds from the IPO. In connection with the voluntary prepayment, we expensed $1,037 of previously unamortized debt issuance costs as a loss on extinguishment of debt in the consolidated statements of operations and comprehensive income (loss). The early prepayment resulted in the elimination of required quarterly amortization principal payments through 2026.

In December 2021, in connection with the Clean Streak Ventures acquisition, we entered into Amendment No. 3 to the Amended and Restated First Lien Credit Agreement which amended and restated the Amended and Restated First Lien Credit Agreement entered into in May 2019. Under the terms of the Amended First Lien Credit

Agreement, the previous First Lien Term Loan was increased by $290,000 to $903,301 with the balance due on May 14, 2026. The incremental increase in aggregate principal of $290,000 resulted in $285,962 of proceeds net of discount and deferred debt issuance costs. In connection with the Amendment No. 3 to Amended and Restated First Lien Credit Agreement, we expensed $21 of previously unamortized debt issuance costs as a loss on extinguishment of debt in the consolidated statements of operations and comprehensive income (loss).

In December 2022, we entered into Amendment No. 4 to the Amended and Restated First Lien Credit Agreement with the lenders party thereto, and Jeffries Finance LLC, as administrative agent, to transition from LIBOR to Eurocurrency rate SOFR spread, whereas all revolver borrowings and term loan borrowings under the existing credit agreement will be SOFR based. All other terms governing this term loan facility remained substantially the same.

As of December 31, 2023 and 2022, the amount outstanding under the First Lien Term Loan was $901,201. As of December 31, 2023 and 2022, the interest rate on the First Lien Term Loan was 8.46% and 7.42%, respectively.

The Amended and Restated First Lien Credit Agreement requires us to maintain compliance with a First Lien Net Leverage Ratio. As of December 31, 2023, we were in compliance with the First Lien Net Leverage Ratio financial covenant of the Amended and Restated First Lien Credit Agreement.

Revolving Commitment

In June 2021, we entered into Amendment No. 2 to Amended and Restated First Lien Credit Agreement that (i) increased the maximum available borrowing capacity under the Revolving Commitment from $75,000 to $150,000 and (ii) extended the maturity date of the Revolving Commitment to the earliest to occur of (a) June 4, 2026, (b) the date that is six months prior to the maturity date of the First Lien Term Loan (provided that clause (b) shall not apply if the maturity date for the First Lien Term Loan is extended to a date that is at least six months after June 4, 2026, the First Lien Term Loan is refinanced having a maturity date at least six months after June 4, 2026, or the First Lien Term Loan is paid in full), (c) the date that commitments under the Revolving Commitment are permanently reduced to zero, and (d) the date of the termination of the commitments under the Revolving Commitment. The increase to the maximum available borrowing capacity was effected on the close of the IPO in June 2021.

As of December 31, 2023 and 2022, there were no amounts outstanding under the Revolving Commitment.

The maximum available borrowing capacity under the Revolving Commitment is reduced by outstanding letters of credit under the Revolving Commitment. As of December 31, 2023 and 2022, the available borrowing capacity under the Revolving Commitment was $149,193 and $148,581, respectively.

In addition, an unused commitment fee based on our First Lien Net Leverage Ratio is payable on the average of the unused borrowing capacity under the Revolving Commitment. As of December 31, 2023 and 2022, the unused commitment fee was 0.25%.

Standby Letters of Credit

As of December 31, 2023, we have a letter of credit sublimit of $10,000 under the Revolving Commitment, provided that the total utilization of revolving commitments under the Revolving Commitment does not exceed $150,000 subsequent to the First Lien Credit Agreement. Any letter of credit issued under the Credit Agreement has an expiration date which is the earlier of (i) no later than 12 months from the date of issuance or (ii) five business days prior to the maturity date of the Revolving Commitment, as amended under Amendment No. 2 to Amended and Restated First Lien Credit Agreement. Letters of credit under the Revolving Commitment reduce the maximum available borrowing capacity under the Revolving Commitment. As of December 31, 2023 and 2022, the amounts associated with outstanding letters of credit were $807 and $1,419, respectively, and unused letters of credit under the Revolving Commitment were $9,193 and $8,581, respectively.