Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.21.2
Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2021
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 nine months ended September 30, 2021 and 2020 is set forth below (shares in thousands):
2021 2020
RSUs Weighted Average
Grant Date Fair Value
(Per share)		 RSUs Weighted Average
Grant Date Fair Value
(Per share)
Unvested at January 1 3,869  $37.57 3,265  $35.34
Granted 945  $82.75 2,008  $39.65
Vested (1,442) $36.92 (1,228) $35.68
Forfeited (119) $47.23 (114) $36.26
Unvested at period ended September 30
 3,253  $50.71 3,931  $37.41
A summary of the activity for PSUs to be settled in common stock for the nine months ended September 30, 2021 and 2020 is set forth below (shares in thousands):
2021 2020
PSUs Weighted Average
Grant Date Fair Value
(Per share)		 PSUs Weighted Average
Grant Date Fair Value
(Per share)
Unvested at January 1 1,047  $37.65 848  $33.20
Granted 174  $90.44 436  $34.59
Vested (268) $38.28 (238) $17.48
Forfeited (11) $36.90 —  N/A
Unvested at September 30
 942  $47.27 1,046  $37.35
Grant Date Fair Value for Awards of Performance Units Inputs The Monte Carlo simulation valuation methodology applied the following key inputs:
2021 2020
Valuation date price based on March 25, 2021 and March 26, 2020 closing stock prices of Quanta common stock $83.48 $31.49
Expected volatility 36  % 34  %
Risk-free interest rate 0.26  % 0.35  %
Term in years 2.77 2.76