Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders' Equity

Schedule of option activity under the 2010 Stock Plan

Option activity under the 2010 Stock Plan was as follows:

	Shares Subject to
	Outstanding Options
		Weighted Average
	Shares	Exercise Price
Balance at December 31, 2020	12,115,288	$	88.31
Options granted	2,540,313	$	84.92
Options exercised	(622,944)	$	66.44
Options cancelled	(1,269,197)	$	91.44
Balance at December 31, 2021	12,763,460	$	88.39

Schedule of stock options outstanding and exercisable by exercise price range

The following table summarizes information about stock options outstanding as of December 31, 2021 under the 2010 Stock Plan:

	Options Outstanding				Options Exercisable
		Weighted Average	Weighted			Weighted
		Remaining	Average			Average
	Number	Contractual Life	Exercise		Number	Exercise
Range of Exercise Prices	Outstanding	(in years)	Price		Exercisable	Price
$22.05 - $68.62	1,304,595	6.05	$	64.71	1,048,050	$	64.04
$68.82 - $69.35	89,030	8.35		69.15	31,252		68.95
$72.27 - $72.27	1,470,150	6.88		72.27	770,726		72.27
$72.58 - $80.50	1,614,398	5.77		77.49	1,131,015		76.77
$80.56 - $83.58	1,338,974	9.26		83.34	72,885		81.68
$83.83 - $85.01	1,371,805	6.14		84.52	1,008,722		84.42
$85.34 - $94.63	1,655,056	7.63		91.18	927,332		92.12
$95.34 - $101.79	1,293,897	3.88		96.28	876,609		96.33
$102.65 - $113.64	1,853,430	6.11		109.99	1,386,235		111.21
$115.19 - $138.52	772,125	4.93		128.71	772,125		128.71
	12,763,460				8,024,951

Schedule of activity summarized under all stock plans other than options

RSU and PSU award activity under the 2010 Stock Plan was as follows:

	Shares Subject to
	Outstanding Awards
	Shares	Grant Date Value
Balance at December 31, 2020	3,284,583	$	87.42
RSUs granted	2,102,386	$	82.39
PSUs granted	214,449	$	74.26
RSUs released	(857,367)	$	87.82
PSUs released	(200,353)	$	68.08
RSUs cancelled	(409,333)	$	89.17
PSUs cancelled	(167,477)	$	72.48
Balance at December 31, 2021	3,966,888	$	84.91

Schedule of share activity

The following table summarizes our shares available for grant under the 2010 Plan. Each RSU and PSU grant reduces the available share pool by 2 shares.

	Shares Available
	for Grant
Balance at December 31, 2020	5,515,182
Additional authorization	9,500,000
Options, RSUs and PSUs granted	(7,174,371)
Options, RSUs and PSUs cancelled	2,272,487
Balance at December 31, 2021	10,113,298