During the three months ended March 31, 2024 and 2023, we granted restricted stock units (which we refer to as “RSUs”) covering 0.2 million and 0.2 million shares of common stock, respectively, with a grant date fair value of $85.84 and $62.61 per share, respectively, that vest over a three year period.

During the three months ended March 31, 2024, we granted performance share units (which we refer to as “PSUs”) covering up to 0.3 million shares of common stock assuming maximum level of performance with a grant date fair value of $82.23 per share that are subject

to both service and performance vesting conditions. During the three months ended March 31, 2023, we did not grant any PSUs. The quantity of shares that will ultimately vest and be issued upon settlement of the PSUs ranges from 0% to 250% of a targeted number of shares and will be determined based on an achievement of a three year adjusted pre-tax income performance goal. During the three months ended March 31, 2024 and 2023, we issued 0.2 million and 0.3 million shares of common stock, respectively, upon the vesting and settlement of PSUs that were granted in previous periods. Approximately 1.1 million shares will vest from 2025 to 2027 if the defined maximum performance targets are met, and no shares will vest if the defined minimum performance targets are not met.

A summary of our outstanding PSUs, assuming the current estimated level of performance achievement, and RSUs are as follows (in thousands, except years):


	March 31, 2024
Unvested units		1,248
Unrecognized compensation cost	$	45,077
Weighted-average years to recognize compensation cost		1.83

During the three months ended March 31, 2024 and 2023, we recognized stock-based compensation expense of $2.8 million and $5.4 million, respectively. Stock-based compensation expense is included in selling, general, and administrative expense on our condensed consolidated statements of operations. Stock-based compensation expense for PSUs is initially estimated based on target performance achievement and adjusted as appropriate throughout the performance period. Accordingly, future compensation cost associated with outstanding PSUs may increase or decrease based on the probability and extent of achievement with respect to the applicable performance measures.