Unvested RSUs as of June 30, 2026 were composed of 0.8 million RSUs with only service conditions and 0.1 million performance share units ("PSUs") with both service conditions and performance conditions. RSUs granted with only service conditions generally vest over a four-year period, assuming continued employment through the applicable vesting date. The number of PSUs granted, as included in the above table, assumes achievement of the performance metrics at 100% of the performance target. The unvested PSUs as of June 30, 2026, are subject to vesting based on the achievement of pre-established performance metrics for the year ending December 31, 2026 and will vest over a three-year period, assuming continued employment through each applicable vesting date. The actual number of shares to be granted at the end of the performance period will range from 0% to 150% of the target number of shares depending on achievement relative to the performance metrics over the applicable period; however, performance-based compensation expense is included in calculating achievement of the performance metrics, resulting in an effective maximum payout of approximately 135% of target.

We recognized stock-based compensation expense for the RSUs and PSUs of $20.1 million and $17.9 million for the three months ended June 30, 2026 and 2025, respectively and $37.8 million and $33.9 million for the six months ended June 30, 2026 and 2025, respectively. As of June 30, 2026, the total estimated remaining stock-based compensation expense for the aforementioned RSUs and PSUs was $143.3 million, which is expected to be recognized over a weighted average period of 2.5 years.