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Stockholders' Equity | 3 Months Ended
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Mar. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Stockholders' Equity |
7. Stockholders’ Equity
Share-Based Compensation Our share-based compensation expense is associated with RSUs, PSUs, and our Employee Stock Purchase Plan, or ESPP. The following table summarizes our share-based compensation expense included in our condensed consolidated statements of operations for the periods shown:
| Three Months Ended March 31, |  |
(In millions) | 2025 |  | 2024 |  |  |  |
Cost of sales | $ | 3.2 |  |  | $ | 3.7 |  |  |  |  |
Research and development | 12.8 |  |  | 11.5 |  |  |  |  |
Selling, general and administrative | 18.2 |  |  | 23.8 |  |  |  |  |
Total share-based compensation expense | $ | 34.2 |  |  | $ | 39.0 |  |  |  |  |
As of March 31, 2025, unrecognized estimated compensation costs related to RSUs and PSUs totaled $339.9 million and are expected to be recognized over a weighted-average period of approximately 2.3 years. Share Repurchase Program and Treasury Shares Repurchased shares of our common stock are held as treasury shares until they are reissued or retired. We have not yet determined the ultimate disposition of repurchased shares and consequently we continue to hold them as treasury shares rather than retiring them. Authorization of future stock repurchase programs is subject to the final determination of our Board of Directors. We did not repurchase or issue any treasury shares for the three months ended March 31, 2025.

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