v3.26.1
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule 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 six months ended June 30, 2026 and 2025 is as follows (RSUs in thousands):
20262025
RSUsWeighted Average
Grant Date Fair Value
(Per Unit)		RSUsWeighted Average
Grant Date Fair Value
(Per Unit)
Unvested at January 11,754 $226.392,024 $173.32
Granted380 $541.66506 $274.46
Vested(488)$217.38(516)$163.89
Forfeited(60)$207.43(61)$187.76
Unvested at June 30
1,586 $305.211,953 $201.57
A summary of the activity for PSUs to be settled in common stock for the six months ended June 30, 2026 and 2025 is as follows (PSUs in thousands):
20262025
PSUsWeighted Average
Grant Date Fair Value
(Per Unit)		PSUsWeighted Average
Grant Date Fair Value
(Per Unit)
Unvested at January 1348 $224.15425 $177.69
Granted193 $788.0092 $259.17
Vested(149)$174.50(165)$123.88
Unvested at June 30
392 $520.57352 $224.11
Grant Date Fair Value for Awards of Performance Units Inputs The Monte Carlo simulation valuation methodology applied the following key inputs:
20262025
Valuation date price based on closing stock prices of Quanta common stock on February 26, 2026 and April 10, 2026 for 2026 and February 27, 2025 for 2025
$565.05 and $585.36
$259.26
Expected volatility (1)
35%
34%
Risk-free interest rate
3.45% - 3.85%
4.05%
Term in years
2.85 to 4.73
2.84
(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.