Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Information for the Equity Awards Granted

The following table summarizes information for the equity awards granted in 2022:


						Options												Restricted Stock Units												Performance Stock Units												Warrants
												Weighted												Weighted												Weighted												Weighted
												average grant-						Number of						average grant-						Number of						average grant-												average grant-
						Number of						date fair value						restricted						date fair value						performance						date fair value						Number of						date fair value
						options						per unit						stock units						per unit						stock units						per unit						warrants						per unit
Beginning balance—January 1, 2022						292,533						$	9.22					1,481,992						$	22.76					410,357						$	28.52					31,519						$	18.00
Granted						—						—						557,253						27.52						316,705						28.17						—						—
Forfeited/ Canceled						(1,260)						10.09						(111,203)						26.83						(17,450)						34.89						—						—
Exercised						(10,691)						10.45						—						—						—						—						—						—
Vested						—						—						(827,712)						20.96						(297,000)						26.20						—						—
Balance—December 31, 2022						280,582						$	9.27					1,100,330						$	26.12					412,612						$	29.66					31,519						$	18.00

The fair value of the performance stock units granted was estimated as of the grant date using Monte Carlo simulations, which requires the input of subjective assumptions, including the expected volatility and the expected term.


						Performance Stock Units
						2022						2021						2020
Risk-free interest rate						1.44%						0.29%						0.85%
Dividend yield						N/A						N/A						N/A
Volatility						67%						70%						39%
Expected term						3 years						3 years						3 years

Summit Materials, LLC

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Information for the Equity Awards Granted

The following table summarizes information for the equity awards granted in 2022:


						Options												Restricted Stock Units												Performance Stock Units												Warrants
												Weighted												Weighted												Weighted												Weighted
												average grant-						Number of						average grant-						Number of						average grant-												average grant-
						Number of						date fair value						restricted						date fair value						performance						date fair value						Number of						date fair value
						options						per unit						stock units						per unit						stock units						per unit						warrants						per unit
Beginning balance—January 1, 2022						292,533						$	9.22					1,481,992						$	22.76					410,357						$	28.52					31,519						$	18.00
Granted						—						—						557,253						27.52						316,705						28.17						—						—
Forfeited/ Canceled						(1,260)						10.09						(111,203)						26.83						(17,450)						34.89						—						—
Exercised						(10,691)						10.45						—						—						—						—						—						—
Vested						—						—						(827,712)						20.96						(297,000)						26.20						—						—
Balance—December 31, 2022						280,582						$	9.27					1,100,330						$	26.12					412,612						$	29.66					31,519						$	18.00


						Performance Stock Units
						2022						2021						2020
Risk-free interest rate						1.44%						0.29%						0.85%
Dividend yield						N/A						N/A						N/A
Volatility						67%						70%						39%
Expected term						3 years						3 years						3 years