Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2023

Summary of Restricted Stock Unit and PSU Activity

The following table summarizes restricted stock awards activity for the nine months ended September 30, 2023:

	Time-Based					Market-Based
	Restricted Stock Awards					Restricted Stock Awards
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
Unvested shares of restricted stock outstanding at December 31, 2022		479.1		$	315.04		1,677.0		$	116.36
Granted		487.8		$	313.36		87.6		$	316.12
Vested		(131.5	)	$	293.48		—		$	—
Forfeited		(61.2	)	$	325.79		(15.7	)	$	298.67
Unvested shares of restricted stock outstanding at September 30, 2023		774.2		$	316.79		1,748.9		$	124.73

The following table summarizes PSU and RSU activity for the nine months ended September 30, 2023:

	Time RSUs					PSUs
	Units			Weighted Average Grant Date Fair Value Per Unit		Units			Weighted Average Grant Date Fair Value Per Unit
Unvested restricted stock units outstanding at December 31, 2022		0.5		$	377.01		77.8		$	409.13
Granted		8.8		$	297.49		39.1		$	244.39
Vested		(0.1	)	$	377.01		(5.2	)	$	526.66
Forfeited		—		$	—		(3.5	)	$	526.66
Unvested restricted stock units outstanding at September 30, 2023 (1)		9.2		$	300.74		108.2		$	340.08

(1)A maximum of 211,806 shares could be delivered upon settlement of PSUs based upon the Company’s achievement of the applicable performance goals over the applicable performance periods.

Summary of Unrecognized Compensation Cost and Related Weighted Average Recognition Period Associated with Unvested restricted Stock Awards and Unvested Restricted Stock Units

The following table presents the unrecognized compensation cost and the related weighted average recognition period associated with unvested restricted stock awards and unvested restricted stock units awards as of September 30, 2023.

	Restricted Stock		Restricted Stock
	Awards		Units
Unrecognized compensation cost	$	270,993	$	8,803
Weighted average period for recognition (years)		2.5		0.8