Marketable Securities

A summary of the Company’s cash, cash equivalents and marketable securities is shown below:



	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
As of June 30, 2017
Cash and cash equivalents:
Cash and money market funds	$	1,217,134	$	—	$	—		$	1,217,134
Commercial paper	5,996		—		—			5,996
Total cash and cash equivalents	$	1,223,130	$	—	$	—		$	1,223,130
Marketable securities:
Corporate equity securities	43,213		7,836		—			51,049
Commercial paper (matures within 1 year)	103,386		1		(40		)	103,347
Corporate debt securities (matures within 1 year)	218,216		4		(143		)	218,077
Corporate debt securities (matures after 1 year)	73,115		2		(70		)	73,047
Total marketable securities	$	437,930	$	7,843	$	(253	)	$	445,520
Total cash, cash equivalents and marketable securities	$	1,661,060	$	7,843	$	(253	)	$	1,668,650

As of December 31, 2016
Cash and cash equivalents:
Cash and money market funds	$	1,183,945	$	—	$	—		$	1,183,945
Total cash and cash equivalents	$	1,183,945	$	—	$	—		$	1,183,945
Marketable securities:
Government-sponsored enterprise securities (matures within 1 year)	$	15,506	$	2	$	—		$	15,508
Corporate equity securities	43,213		21,347		—			64,560
Commercial paper (matures within 1 year)	59,331		73		—			59,404
Corporate debt securities (matures within 1 year)	111,225		—		(85		)	111,140
Total marketable securities	$	229,275	$	21,422	$	(85	)	$	250,612
Total cash, cash equivalents and marketable securities	$	1,413,220	$	21,422	$	(85	)	$	1,434,557

The Company has a limited number of marketable securities in insignificant loss positions as of June 30, 2017, which the Company does not intend to sell and has concluded it will not be required to sell before recovery of the amortized costs of the investment at maturity. There were no charges recorded for other-than-temporary declines in fair value of marketable securities nor gross realized gains or losses recognized in the three and six months ended June 30, 2017 and 2016.