Company: PRTA
Filing Date: 2025-02-27
Form Type: 10-K
Source: 0001559053-25-000009
Chunk: 193

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-02-27
Form: 10-K
Item: Item 8
Chunk 193
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 Company recognized tax benefits from share-based awards of $8.3 million, $7.2 million, and $5.8 million, for the years ended December 31, 2024, 2023 and 2022, respectively. The fair value of the options granted to employees and non-employee directors during the years ended December 31, 2024, 2023 and 2022 was estimated as of the grant date using the Black-Scholes option-pricing model using the key assumptions listed in the following table.Year Ended December 31,202420232022Expected volatility*74.5% -78.6%76.4% -90.1%82.1% -86.0%Risk-free interest rate*3.5% -4.7%3.5% -4.8%1.5% -4.2%Expected dividend yield—%—%—%Expected life (in years)*4.6 -5.74.4 -5.46.0 -6.0Weighted average grant date fair value$18.69$37.32$23.43_____________*The presentation of the expected volatility, risk-free interest rate, and expected life for 2023 and 2022 has been revised to present as range of values to conform to the current year presentation.The fair value of employee stock options is amortized on a straight-line basis over the requisite service period for each award. Each of the inputs discussed above is subjective and generally requires management judgment to determine.

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The following table summarizes the Company’s stock option activity during the year ended December 31, 2024:OptionsWeightedAverageExercisePriceWeightedAverageRemainingContractualTerm (years)AggregateIntrinsicValue(in thousands)Outstanding at December 31, 20239,866,337 $29.06 6.60$118,447 Granted2,288,450 28.69 Exercised(125,615)15.19 Forfeited(524,505)36.44 Expired(397,294)31.70 Outstanding at December 31, 202411,107,373 $28.70 6.16$3,401 Vested and expected to vest at December 31, 202410,827,212 $28.52 6.09$3,401 Exercisable at December