Stock-Based Compensation |
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| Stock-Based Compensation | (11) Stock-Based Compensation A summary of stock option activity for the six months ended June 30, 2026 is as follows:
The weighted average grant-date fair value of stock options granted during the three and six months ended June 30, 2026 was $20.96 and $20.90, respectively. The aggregate intrinsic value of stock options vested and expected to vest at June 30, 2026 was $107.2 million. The aggregate intrinsic value of stock options exercisable at June 30, 2026 was $72.5 million. As of June 30, 2026, total compensation cost related to non-vested employee, consultant and non-employee director stock options not yet recognized was approximately $98.5 million, net of estimated forfeitures, which is expected to be recognized as expense over a weighted average period of 3.0 years. Stock-based compensation expense for the three and six months ended June 30, 2026 and 2025 was recorded as follows:
The fair values of employee, consultant and non-employee director stock options granted during the three and six months ended June 30, 2026 and 2025 were valued using the Black-Scholes option pricing model with the following assumptions:
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