v3.25.4
STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Summary of RSUs and PSUs to be Settled in Common Stock Activity
A summary of the activity for RSUs to be settled in common stock for the years ended December 31, 2025, 2024 and 2023 is as follows (RSUs in thousands):
202520242023
RSUsWeighted Average
Grant Date Fair Value
(Per Unit)		RSUsWeighted Average
Grant Date Fair Value
(Per Unit)		RSUsWeighted Average
Grant Date Fair Value
(Per Unit)
Unvested at January 12,024 $173.322,548 $104.763,263 $78.74
Granted638 $302.14857 $246.34684 $161.81
Vested(759)$154.01(1,216)$82.86(1,268)$68.06
Forfeited(149)$192.97(165)$165.14(131)$116.29
Unvested at December 311,754 $226.392,024 $173.322,548 $104.76
A summary of the activity for PSUs to be settled in common stock for the years ended December 31, 2025, 2024 and 2023 is as follows (PSUs in thousands):
202520242023
PSUsWeighted Average
Grant Date Fair Value
(Per Unit)		PSUsWeighted Average
Grant Date Fair Value
(Per Unit)		PSUs
Weighted Average
Grant Date Fair Value
(Per Unit)
Unvested at January 1425 $177.69491 $129.70733 $65.39
Granted92 $259.17109 $263.34177 $174.50
Vested(165)$123.88(175)$96.45(413)$35.12
Forfeited(4)$222.94— N/A(6)$101.66
Unvested at December 31348 $224.15425 $177.69491 $129.70
Grant Date Fair Value for Awards of Performance Units Inputs
The Monte Carlo simulation valuation methodology applied the following key inputs:
202520242023
Valuation date price based on February 27, 2025, March 4, 2024 and March 9, 2023 closing stock prices of Quanta common stock$259.26$243.34$160.55
Expected volatility (1)
34 %33 %35 %
Risk-free interest rate4.05 %4.43 %4.62 %
Term in years2.842.832.81
(1)    The expected volatility inputs for Quanta are based on historical volatility, which is based on Quanta’s dividend-adjusted closing prices over a period equivalent to the performance period.