Investments

3 Months Ended

Apr. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

As of April 30, 2022 and January 31, 2022, our marketable securities consisted of the following:


	As of April 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)





Commercial paper	$	34,881	$	—	$	—	$	34,881
Agency bonds	604,439		1		(10,043)		594,397
Corporate and other debt securities	288,312		1		(3,062)		285,251
U.S. government agency securities	3,192,672		43		(46,657)		3,146,058
Treasury bills	258,595		1		(209)		258,387
Marketable securities	$	4,378,899	$	46	$	(59,971)	$	4,318,974


	As of January 31, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value

	(in thousands)


Commercial paper	$	28,723	$	—	$	—	$	28,723
Agency bonds	632,935		2		(3,328)		629,609
Corporate and other debt securities	282,124		5		(1,202)		280,927
U.S. government agency securities	3,046,742		28		(19,261)		3,027,509
Treasury bills	389,826		—		(148)		389,678
Marketable securities	$	4,380,350	$	35	$	(23,939)	$	4,356,446

Unrealized losses for securities that have been in an unrealized loss position for less than 12 months were $58.2 million as of April 30, 2022 and $23.3 million as of January 31, 2022. Unrealized losses for securities that have been in an unrealized loss position for 12 months or longer were immaterial as of April 30, 2022 and January 31, 2022. We review the individual securities that have unrealized losses on a regular basis to evaluate whether or not any security has experienced, or is expected to experience, credit losses resulting in the decline in fair value. We evaluate, among other factors, whether we have the intention to sell any of these marketable securities and whether it is more likely than not that we will be required to sell any of them before recovery of the amortized cost basis. We have not recorded an allowance for credit losses, as we believe any such losses would be immaterial based on the high-grade credit rating for each of our marketable securities as of the end of each period. There were no material realized gains or losses from available-for-sale securities that were reclassified out of accumulated other comprehensive income (loss) for the three months ended April 30, 2022 and 2021.

The following table presents the contractual maturities of our marketable securities as of April 30, 2022 and January 31, 2022:


	As of
	April 30, 2022		January 31, 2022

	(in thousands)
Less than one year	$	2,624,024	$	2,387,139
Due in one to five years	1,694,950		1,969,307
Total	$	4,318,974	$	4,356,446

Strategic Investments

Strategic investments by form and measurement category as of April 30, 2022 were as follows:


	Measurement Category
	Fair Value		Measurement Alternative		Equity Method		Total

	(in thousands)
Equity securities	$	133,013	$	102,150	$	93,653	$	328,816
Debt securities	14,344		—		—		14,344
Strategic investments	$	147,357	$	102,150	$	93,653	$	343,160

Strategic investments by form and measurement category as of January 31, 2022 were as follows:


	Measurement Category
	Fair Value		Measurement Alternative		Equity Method		Total

	(in thousands)
Equity securities	$	168,784	$	91,399	$	93,400	$	353,583
Debt securities	14,231		—		—		14,231
Strategic investments	$	183,015	$	91,399	$	93,400	$	367,814