Stock-Based Compensation |
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| Stock-Based Compensation |
12.Stock-Based Compensation Our 2021 Equity Incentive Plan (the “2021 Plan”) allows for the grant of, among other types of awards, stock options; restricted stock; RSUs; and PSUs. Restricted Stock and Restricted Stock Units RSU activity during the period was as follows:
The RSUs granted during the nine months ended September 30, 2023 generally vest in the following installments: (i) at the first anniversary of the award date, (ii) at the second anniversary of the award date, and (iii) at the third anniversary of the award date. As of September 30, 2023, approximately $16.9 million of compensation cost related to unvested shares of restricted stock and RSUs remained to be recognized. The cost is expected to be recognized over a weighted-average period of 1.1 years. Performance-Based Restricted Stock Units PSU activity during the period was as follows:
The PSUs granted in 2023 were granted to management under the 2021 Plan and have the following performance criteria:
The vesting and payout of the PSUs occur when the related service condition is completed, which is approximately three years after the grant date regardless of the duration of the stipulated performance period. The PSUs can be paid out in either Class A common stock or cash, at our election. As of September 30, 2023, approximately $3.6 million of compensation cost related to unvested PSUs remained to be recognized. The cost is expected to be recognized over a weighted-average period of 2.0 years. The grant date fair value was determined using the Monte Carlo simulation method and is expensed ratably over the service period. Expected volatilities used in the fair value simulation were estimated using historical periods consistent with the remaining performance periods. The risk-free rate was based on the U.S. Treasury rate for a term commensurate with the expected life of the grant. We used the following assumptions to estimate the fair value of PSUs granted during the nine months ended September 30, 2023:
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