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Equity Incentive Awards (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The following weighted-average
assumptions were used for stock options granted in the nine months ended September 30, 2024 and 2023:
 Expected VolatilityRisk-free Interest RateExpected TermDividend
Rate
September 30, 2024    
Employees96 %4.4 %4— %
Officers and non-employee directors104 %4.2 %6— %
September 30, 2023
Employees93 %3.9 %4— %
Officers and non-employee directors100 %3.9 %6— %
Share-based Payment Arrangement, Option, Activity
The following is a summary of stock option activity under Lexicon’s stock-based compensation plans for the nine months ended September 30, 2024:
 Stock OptionsWeighted Average Exercise Price
 (in thousands) 
Outstanding at December 31, 202318,705 $3.93 
Granted6,998 1.96 
Exercised(51)1.72 
Expired(296)11.79 
Forfeited(4,163)2.56 
Outstanding at September 30, 202421,193 3.44 
Exercisable at September 30, 202410,968 $4.63 
Schedule of Nonvested Restricted Stock Units Activity
The following is a summary of restricted stock unit activity under Lexicon’s stock-based compensation plans for the nine months ended September 30, 2024:
 RSU’sWeighted Average Grant Date
Fair Value
 (in thousands) 
Outstanding at December 31, 20235,015 $2.78 
Granted8,527 2.14 
Vested(1,970)3.10 
Forfeited(3,010)2.25 
Outstanding at September 30, 20248,562 $2.25