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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021


		Eight Separate Adjusted EBITDA (CEO
Eight Separate Revenue Goals ⁽¹⁾		Performance Award) Goals
(in thousands)		(in thousands)
Goal #1, $710,058		Goal #9, $125,000
Goal #2, $860,058		Goal #10, $155,000
Goal #3, $1,010,058		Goal #11, $175,000
Goal #4, $1,210,058		Goal #12, $190,000
Goal #5, $1,410,058		Goal #13, $200,000
Goal #6, $1,610,058		Goal #14, $210,000
Goal #7, $1,810,058		Goal #15, $220,000
Goal #8, $2,010,058		Goal #16, $230,000

(1)	In connection with the business acquisition that was completed during the three months ended June 30, 2018, the revenue goals were adjusted for the acquiree’s Target Revenue, as defined in the CEO Performance Award agreement.

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the six months ended June 30, 2021 (number of units and aggregate intrinsic value in thousands):


	Number of	Weighted Average		Aggregate
	Units	Grant-Date Fair Value		Intrinsic Value
Units outstanding, beginning of year	1,107	$	76.10
Granted	98		149.92
Released	(276)		51.65
Forfeited	(64)		98.43
Units outstanding, end of period	865		90.59	$	152,892

Summary of Performance Stock Unit Activity

The following table summarizes PSU activity, inclusive of XSUs, for the six months ended June 30, 2021 (number of units and aggregate intrinsic value in thousands):


	Number of	Weighted Average		Aggregate
	Units	Grant-Date Fair Value		Intrinsic Value
Units outstanding, beginning of year	5,618	$	35.71
Granted	225		50.00
Released	(1,696)		41.20
Forfeited	(60)		35.80
Units outstanding, end of period	4,087		34.22	$	722,593

Summary of the Company's Stock Options Activity

The following table summarizes stock option activity for the six months ended June 30, 2021 (number of units and aggregate intrinsic value in thousands):


				Weighted
		Weighted		Average
	Number	Average		Remaining
	of	Exercise		Contractual	Aggregate
	Options	Price		Life (years)	Intrinsic Value
Options outstanding, beginning of year	6,366	$	28.58
Granted	—		—
Exercised	—		—
Expired / terminated	—		—
Options outstanding, end of period	6,366		28.58	6.66	$	943,547
Options exercisable, end of period	4,243		28.58	6.66		629,031

Reported Share-Based Compensation

The following table summarizes the composition of stock-based compensation expense for the three and six months ended June 30, 2021 and 2020 (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Cost of products sold and services delivered	$	1,838	$	836	$	3,327	$	1,426
Sales, general and administrative expenses		114,089		26,766		185,104		41,736
Research and development expenses		21,622		6,233		38,728		10,868
Total stock-based compensation expense	$	137,549	$	33,835	$	227,159	$	54,030