Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

A summary of Sangamo’s stock option activity is as follows:

				Weighted-
				Average		Weighted-Average		Aggregate
	Number of			Exercise per		Remaining		Intrinsic
	Shares			Share Price		Contractual Term		Value
						(In years)		(In thousands)
Options outstanding at December 31, 2017		8,287,456		$	7.77
Options granted		3,115,078		$	17.78
Options exercised		(2,028,328	)	$	7.12
Options canceled		(648,114	)	$	11.15
Options outstanding at December 31, 2018		8,726,092		$	11.23		7.35	$	24,468
Options vested and expected to vest at December 31, 2018		8,726,092		$	11.23		7.35	$	24,468
Options exercisable at December 31, 2018		3,699,150		$	8.91		5.39	$	12,702

The following table summarizes information with respect to stock options outstanding at December 31, 2018:

	Options Outstanding and Exercisable				Options Exercisable
	Number of				Number of
	Shares of				Shares of
	Common Stock		Weighted-Average		Common Stock
	subject to		Remaining		subject to		Weighted-Average
Range of Exercise Price	options		Contractual Life		options		Exercise Price
			(In years)
$2.55 - $3.20		352,920	7.56			91,772	$	3
$3.50 - $3.50		1,171,546		8.00		520,209	$	4
$3.55 - $5.70		894,224	5.06			589,511	$	5
$5.72 - $7.20		915,176	7.42			610,840	$	7
$7.70 - $9.99		897,995	6.18			566,601	$	9
$10.16 - $12.72		936,327	6.91			403,714	$	12
$12.80 - $15.00		1,213,226	6.37			694,173	$	14
$15.11 -$19.80		758,250	8.74			216,830	$	16
$20.05 - $20.05		1,003,728	9.06			—	$	-
$20.85 - $24.95		582,700	9.08			5,500	$	21
		8,726,092		7.35		3,699,150	$	9

A summary of Sangamo’s RSU activity is as follows:

	Number			Weighted-Average
	of			Remaining		Aggregate Intrinsic
	Shares			Contractual Term		Value
				(In years)		(In thousands)
RSUs outstanding at December 31, 2017		80,172
RSUs awarded		346,055
RSUs released		(55,592	)
RSUs forfeited		(47,934	)
RSUs outstanding at December 31, 2018		322,701			1.25		3,705
RSUs vested and expected to vest at December 31, 2018		322,701			1.25	$	3,705