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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2024
Stock-Based Compensation |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ |
​ |  | ​ | ​ | ​ | ​ | Average | ​ | Aggregate |
​ |  | ​ | ​ | Weighted | ​ | Remaining | ​ | Intrinsic |
​ |  | ​ | ​ | Average | ​ | Contractual | ​ | Value | ​
​ |  | Options |  | Exercise Price |  | Term (in years) |  | (in millions) |
Options outstanding at January 1, 2024 |  | 120,780,324 | ​ | $ | 25.23 |  | 5.81 | ​ | $ | 2,939.5 | ​
Options granted |  | 116,062 | ​ |  | 45.36 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (6,312,850) | ​ |  | 18.64 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (86,274) | ​ |  | 32.51 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at March 31, 2024 |  | 114,497,262 | ​ | ​ | 25.61 | ​ | 5.69 | ​ | ​ | 3,671.9 | ​
Options granted |  | 7,700,731 | ​ |  | 65.95 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (5,567,231) | ​ |  | 20.95 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (289,042) | ​ |  | 33.73 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at June 30, 2024 |  | 116,341,720 | ​ | ​ | 28.48 |  | 5.81 | ​ | ​ | 4,524.7 | ​
Options granted |  | 182,038 | ​ |  | 66.74 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (4,235,151) | ​ |  | 20.11 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (174,730) | ​ |  | 37.34 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at September 30, 2024 |  | 112,113,877 | ​ | $ | 28.84 |  | 5.64 | ​ | $ | 4,078.1 | ​
Vested and non-vested options expected to vest at September 30, 2024 |  | 109,312,793 | ​ | $ | 28.48 |  | 5.57 | ​ | $ | 4,015.2 | ​
Exercisable options at September 30, 2024 |  | 76,480,116 | ​ | $ | 23.31 |  | 4.57 | ​ | $ | 3,200.8 | ​
Summary of status of non-vested options and changes during the year | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |
​ | ​ | ​ | ​ | Average | ​
​ | ​ | ​ | ​ | Fair Value at | ​
​ | ​ | Options | ​ | Grant Date |
Non-vested options at January 1, 2024 |  | 45,047,962 | ​ | $ | 7.28 | ​
Options granted |  | 116,062 | ​ |  | 13.18 | ​
Options vested |  | (293,452) | ​ |  | 7.89 | ​
Options forfeited |  | (73,050) | ​ |  | 8.86 | ​
Non-vested options at March 31, 2024 |  | 44,797,522 | ​ | ​ | 7.29 | ​
Options granted |  | 7,700,731 | ​ |  | 19.42 | ​
Options vested |  | (16,481,658) | ​ |  | 5.80 | ​
Options forfeited |  | (289,042) | ​ |  | 7.99 | ​
Non-vested options at June 30, 2024 |  | 35,727,553 | ​ | ​ | 10.59 | ​
Options granted |  | 182,038 | ​ |  | 19.64 | ​
Options vested |  | (101,100) | ​ |  | 9.12 | ​
Options forfeited |  | (174,730) | ​ |  | 9.59 | ​
Non-vested options at September 30, 2024 |  | 35,633,761 | ​ | $ | 10.64 | ​
Summary of activity in the option plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended |  | Nine Months Ended |
​ | ​ | September 30, | ​ | September 30, | ​
​ | ​ | 2024 | ​ | 2023 | ​ | 2024 | ​ | 2023 | ​
Total intrinsic value of stock options exercised | ​ | $ | 190.7 | ​ | $ | 208.4 | ​ | $ | 652.3 | ​ | $ | 447.9 | ​
Total fair value of stock options vested | ​ |  | 0.9 | ​ |  | 0.7 | ​ |  | 98.8 | ​ |  | 89.3 | ​
Schedule of restricted share activity | Restricted share activity for the three and nine months ended September 30, 2024 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted Average | ​
​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​
​ | ​ | Restricted | ​ | Fair Value at | ​ | Amortization | ​
​ |  | Shares |  | Grant Date |  | Term (in years) |
Restricted shares outstanding at January 1, 2024 |  | — | ​ | $ | — | ​ | ​ | ​
Restricted shares granted |  | — | ​ |  | — | ​ | ​ | ​
Restricted shares outstanding at March 31, 2024 |  | — | ​ | ​ | — |  | ​ | ​
Restricted shares granted |  | 21,840 | ​ |  | 65.96 | ​ | ​ | ​
Restricted shares outstanding at June 30, 2024 |  | 21,840 | ​ | ​ | 65.96 |  | 0.87 | ​
Restricted shares granted |  | — | ​ |  | — | ​ | ​ | ​
Restricted shares outstanding at September 30, 2024 |  | 21,840 |  | $ | 65.96 |  | 0.62 | ​

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