Pure Storage (PSTG) 10-Q 7 Dec 21 2022 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Oct. 31, 2021	Dec. 01, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Oct. 31, 2021
Document Transition Report	false
Entity File Number	001-37570
Entity Registrant Name	Pure Storage, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-1069557
Entity Address, Address Line One	650 Castro Street,
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041
City Area Code	800
Local Phone Number	379-7873
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	PSTG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		289,947,104
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001474432
Current Fiscal Year End Date	--02-06

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Current assets:
Cash and cash equivalents	$ 404,692	$ 337,147
Marketable securities	958,180	916,388
Accounts receivable, net of allowance of $1,033 and $965	354,179	460,879
Inventory	44,036	46,733
Deferred commissions, current	63,422	57,183
Prepaid expenses and other current assets	102,117	89,836
Total current assets	1,926,626	1,908,166
Property and equipment, net	193,141	163,041
Operating lease right-of-use assets	115,731	134,668
Deferred commissions, non-current	144,898	130,741
Intangible assets, net	66,992	76,648
Goodwill	358,736	358,736
Restricted cash	10,544	10,544
Other assets, non-current	39,088	36,896
Total assets	2,855,756	2,819,440
Current liabilities:
Accounts payable	48,708	67,530
Accrued compensation and benefits	122,969	160,817
Accrued expenses and other liabilities	73,884	61,754
Operating lease liabilities, current	35,061	32,231
Deferred revenue, current	499,176	438,321
Total current liabilities	779,798	760,653
Long-term debt	778,366	755,814
Operating lease liabilities, non-current	99,031	120,361
Deferred revenue, non-current	450,574	405,376
Other liabilities, non-current	23,563	27,230
Total liabilities	2,131,332	2,069,434
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, par value of $0.0001 per share— 20,000 shares authorized; no shares issued and outstanding	0	0
Class A and Class B common stock, par value of $0.0001 per share— 2,250,000 (Class A 2,000,000, Class B 250,000) shares authorized; 278,363 and 290,081 Class A shares issued and outstanding	29	28
Additional paid-in capital	2,447,916	2,307,580
Accumulated other comprehensive income (loss)	(307)	7,410
Accumulated deficit	(1,723,214)	(1,565,012)
Total stockholders’ equity	724,424	750,006
Total liabilities and stockholders’ equity	$ 2,855,756	$ 2,819,440

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Accounts receivable, allowance	$ 965	$ 1,033
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Shares authorized (in shares)	20,000,000	20,000,000
Shares issued (in shares)	0	0
Shares outstanding (in shares)	0	0
Common stock
Shares authorized (in shares)	2,250,000,000	2,250,000,000
Class A
Common stock
Par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Shares authorized (in shares)	2,000,000,000	2,000,000,000
Shares issued (in shares)	290,081,069	278,363,000
Shares outstanding (in shares)	290,081,069	278,363,000
Class B
Common stock
Par value per share (in dollars per share)	$ 0.0001	$ 0.0001
Shares authorized (in shares)	250,000,000	250,000,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Revenue	$ 562,740	$ 410,619	$ 1,472,278	$ 1,181,461
Cost of revenue	187,948	134,103	475,593	373,394
Gross profit	374,792	276,516	996,685	808,067
Operating expenses:
Research and development	147,808	122,981	419,296	350,079
Sales and marketing	193,172	172,282	567,054	517,149
General and administrative	51,890	46,467	138,500	132,063
Restructuring and other	0	0	0	22,990
Total operating expenses	392,870	341,730	1,124,850	1,022,281
Loss from operations	(18,078)	(65,214)	(128,165)	(214,214)
Other income (expense), net	(7,953)	(4,887)	(20,090)	(6,700)
Loss before provision for income taxes	(26,031)	(70,101)	(148,255)	(220,914)
Provision for income taxes	2,700	4,121	9,947	8,869
Net loss	$ (28,731)	$ (74,222)	$ (158,202)	$ (229,783)
Net loss per share attributable to common stockholders, basic (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)
Net loss per share attributable to common stockholders, diluted (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	287,462	269,144	283,918	265,626
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	287,462	269,144	283,918	265,626
Product
Revenue	$ 374,913	$ 274,470	$ 949,736	$ 793,718
Cost of revenue	129,721	86,661	309,935	240,677
Subscription services
Revenue	187,827	136,149	522,542	387,743
Cost of revenue	$ 58,227	$ 47,442	$ 165,658	$ 132,717

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (28,731)	$ (74,222)	$ (158,202)	$ (229,783)
Other comprehensive income (loss):
Unrealized net (losses) gains on available-for-sale securities	(3,710)	(2,869)	(7,121)	4,736
Less: reclassification adjustment for net gains on available-for-sale securities included in net loss	(78)	(257)	(596)	(1,126)
Change in unrealized net (losses) gains on available-for-sale securities	(3,788)	(3,126)	(7,717)	3,610
Comprehensive loss	$ (32,519)	$ (77,348)	$ (165,919)	$ (226,173)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Stockholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Restricted Stock UnitsCommon Stock	Restricted Stock UnitsAdditional Paid-in Capital	Restricted Stock	Restricted StockCommon Stock
Beginning balance (in shares) at Feb. 02, 2020		264,008
Beginning balance at Feb. 02, 2020	$ 830,118	$ 26	$ 2,107,579	$ 5,449	$ (1,282,936)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		4,991
Issuance of common stock upon exercise of stock options	25,645	$ 1	25,644
Stock-based compensation expense	179,884		179,884
Vesting of restricted stock units (in shares)						8,445
Vesting of restricted stock units	0					$ 1	$ (1)
Tax withholding on vesting of restricted stock (in shares)		(305)
Tax withholding on vesting of restricted stock	4,080		4,080
Tax withholding on vesting of equity awards (in shares)		(305)
Tax withholding on vesting of equity awards	(4,080)		(4,080)
Common stock issued under employee stock purchase plan (in shares)		3,714
Common stock issued under employee stock purchase plan	32,439		32,439
Repurchases of common stock (in shares)		(8,496)
Repurchases of common stock	(111,554)	$ (1)	(111,553)
Equity awards assumed in an acquisition	8,802		8,802
Other comprehensive income (loss)	3,610			3,610
Cancellation and forfeiture of restricted stock (in shares)		(317)
Cancellation and forfeiture of restricted stock	0
Net loss	(229,783)				(229,783)
Ending balance (in shares) at Nov. 01, 2020		272,040
Ending balance at Nov. 01, 2020	735,081	$ 27	2,238,714	9,059	(1,512,719)
Beginning balance (in shares) at Aug. 02, 2020		267,776
Beginning balance at Aug. 02, 2020	746,106	$ 27	2,172,391	12,185	(1,438,497)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		678
Issuance of common stock upon exercise of stock options	4,019		4,019
Stock-based compensation expense	59,734		59,734
Vesting of restricted stock units (in shares)						2,990
Vesting of restricted stock units	0		0
Tax withholding on vesting of restricted stock (in shares)		(86)
Tax withholding on vesting of restricted stock	1,239		1,239
Tax withholding on vesting of equity awards (in shares)		(86)
Tax withholding on vesting of equity awards	(1,239)		(1,239)
Forfeiture of restricted stock (in shares)									(87)
Forfeiture of restricted stock								$ 0
Common stock issued under employee stock purchase plan (in shares)		2,129
Common stock issued under employee stock purchase plan	16,418		16,418
Repurchases of common stock (in shares)		(1,360)
Repurchases of common stock	(21,411)		(21,411)
Equity awards assumed in an acquisition	8,802		8,802
Other comprehensive income (loss)	(3,126)			(3,126)
Net loss	(74,222)				(74,222)
Ending balance (in shares) at Nov. 01, 2020		272,040
Ending balance at Nov. 01, 2020	735,081	$ 27	2,238,714	9,059	(1,512,719)
Beginning balance (in shares) at Jan. 31, 2021		278,363
Beginning balance at Jan. 31, 2021	750,006	$ 28	2,307,580	7,410	(1,565,012)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		3,983
Issuance of common stock upon exercise of stock options	33,573		33,573
Stock-based compensation expense	209,401		209,401
Vesting of restricted stock units (in shares)						9,875
Vesting of restricted stock units	0					$ 1	(1)
Tax withholding on vesting of restricted stock (in shares)		(386)
Tax withholding on vesting of restricted stock	8,670		8,670
Tax withholding on vesting of equity awards (in shares)		(386)
Tax withholding on vesting of equity awards	(8,670)		(8,670)
Forfeiture of restricted stock (in shares)		(62)
Forfeiture of restricted stock	0
Common stock issued under employee stock purchase plan (in shares)		4,365
Common stock issued under employee stock purchase plan	36,641		36,641
Repurchases of common stock (in shares)		(6,057)
Repurchases of common stock	(130,608)		(130,608)
Other comprehensive income (loss)	(7,717)			(7,717)
Net loss	(158,202)				(158,202)
Ending balance (in shares) at Oct. 31, 2021		290,081
Ending balance at Oct. 31, 2021	724,424	$ 29	2,447,916	(307)	(1,723,214)
Beginning balance (in shares) at Aug. 01, 2021		284,734
Beginning balance at Aug. 01, 2021	697,444	$ 28	2,388,418	3,481	(1,694,483)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		2,086
Issuance of common stock upon exercise of stock options	22,289		22,289
Stock-based compensation expense	76,616		76,616
Vesting of restricted stock units (in shares)						3,548
Vesting of restricted stock units	0					$ 1	$ (1)
Tax withholding on vesting of restricted stock (in shares)		(81)
Tax withholding on vesting of restricted stock	2,106		2,106
Tax withholding on vesting of equity awards (in shares)		(81)
Tax withholding on vesting of equity awards	(2,106)		(2,106)
Forfeiture of restricted stock (in shares)									(25)
Forfeiture of restricted stock								$ 0
Common stock issued under employee stock purchase plan (in shares)		2,180
Common stock issued under employee stock purchase plan	18,915		18,915
Repurchases of common stock (in shares)		(2,361)
Repurchases of common stock	(56,215)		(56,215)
Other comprehensive income (loss)	(3,788)			(3,788)
Net loss	(28,731)				(28,731)
Ending balance (in shares) at Oct. 31, 2021		290,081
Ending balance at Oct. 31, 2021	$ 724,424	$ 29	$ 2,447,916	$ (307)	$ (1,723,214)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (158,202)	$ (229,783)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	59,605	49,811
Amortization of debt discount and debt issuance costs	23,011	21,525
Stock-based compensation expense	207,763	179,755
Impairment of long-lived assets	471	7,505
Other	8,576	4,111
Changes in operating assets and liabilities, net of effects of acquisition:
Accounts receivable, net	106,788	83,220
Inventory	38	(4,724)
Deferred commissions	(20,395)	(12,885)
Prepaid expenses and other assets	(12,283)	(37,606)
Operating lease right-of-use assets	22,061	21,434
Accounts payable	(14,256)	8,566
Accrued compensation and other liabilities	(35,251)	(9,737)
Operating lease liabilities	(22,094)	(20,444)
Deferred revenue	106,054	57,860
Net cash provided by operating activities	271,886	118,608
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(81,217)	(73,643)
Acquisition, net of cash acquired	0	(339,806)
Purchases of marketable securities	(502,438)	(454,391)
Sales of marketable securities	146,934	132,207
Maturities of marketable securities	303,158	324,780
Other	(600)	(5,000)
Net cash used in investing activities	(134,163)	(415,853)
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from exercise of stock options	33,743	25,677
Proceeds from issuance of common stock under employee stock purchase plan	36,641	32,439
Proceeds from borrowings, net of issuance costs	0	251,892
Repayments of borrowing	(870)	0
Principal payments on finance lease obligations	(414)	0
Tax withholding on vesting of equity awards	(8,670)	(4,080)
Repurchases of common stock	(130,608)	(111,554)
Net cash provided by (used in) financing activities	(70,178)	194,374
Net (decrease) increase in cash, cash equivalents and restricted cash	67,545	(102,871)
Cash, cash equivalents and restricted cash, beginning of period	347,691	377,922
Cash, cash equivalents and restricted cash, end of period	415,236	275,051
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD
Cash and cash equivalents	404,692	263,702
Restricted cash	10,544	11,349
Cash, cash equivalents and restricted cash, end of period	415,236	275,051
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest	3,932	1,062
Cash paid for income taxes	10,051	8,911
Cash paid for amounts included in the measurement of operating lease liabilities	27,379	27,336
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION
Property and equipment purchased but not yet paid	6,413	10,644
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	3,594	53,289
Fair value of equity awards assumed in an acquisition	$ 0	$ 8,802

Business Overview

Business Overview	9 Months Ended
	Oct. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Overview	Business Overview Organization and Description of Business Pure Storage, Inc. (the Company, we, us, or other similar pronouns) was originally incorporated in the state of Delaware in October 2009 under the name OS76, Inc. In January 2010, we changed our name to Pure Storage, Inc. We are headquartered in Mountain View, California and have wholly owned subsidiaries throughout the world. Data is foundational to our customers' digital transformation and we deliver innovative and disruptive technology and data storage solutions that enable customers to maximize the value of their data.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Oct. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation In September 2019, we adopted a 52/53 week fiscal year consisting of four 13-week quarters ending on the first Sunday after January 30, which for fiscal 2021 was January 31, 2021 and for fiscal 2022 will be February 6, 2022. The third quarter of fiscal 2021 and 2022 ended on November 1, 2020 and October 31, 2021. Unless otherwise stated, all dates refer to our fiscal year and fiscal periods. The condensed consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. There were no material changes in the third quarter of fiscal 2022 to our significant accounting policies as described in our Annual Report on Form 10-K for fiscal 2021. Unaudited Interim Consolidated Financial Information The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for fiscal 2021. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2022 or any future period. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates and assumptions due to risks and uncertainties, including uncertainty in the current economic environment from the ongoing COVID-19 pandemic. Such estimates include, but are not limited to, the determination of standalone selling price for revenue arrangements with multiple performance obligations, useful lives of intangible assets and property and equipment, the period of benefit for deferred contract costs for commissions, stock-based compensation, provision for income taxes including related reserves, and the fair value of equity assumed, intangible and tangible assets acquired and liabilities assumed for business combinations. Management bases its estimates on historical experience and on various other assumptions which management believes to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Restricted Cash Restricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program. At the end of fiscal 2021 and the third quarter of fiscal 2022, we had restricted cash of $10.5 million. Recent Accounting Pronouncements Not Yet Adopted In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by the reference rate reform if certain criteria are met. The amendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) which refines the scope of Topic 848 and clarifies some of its guidance. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain convertible instruments, amends guidance on derivative scope exceptions for contracts in an entity's own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. The standard will be effective for us beginning February 7, 2022 and can be applied on either a fully retrospective or modified retrospective basis. We are currently evaluating the impact of this standard on our condensed consolidated financial statements.

Financial Instruments

Financial Instruments	9 Months Ended
	Oct. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Financial Instruments	Financial Instruments Fair Value Measurements We define fair value as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value: • Level 1 - Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities; • Level 2 - Observable inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments; and • Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on our own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation. Cash Equivalents, Marketable Securities and Restricted Cash We measure our cash equivalents, marketable securities, and restricted cash at fair value on a recurring basis. We classify our cash equivalents, marketable securities and restricted cash within Level 1 or Level 2 because they are valued using either quoted market prices or inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. Our fixed income available-for-sale securities consist of high quality, investment grade securities from diverse issuers. The valuation techniques used to measure the fair value of our marketable securities were derived from non-binding market consensus prices that are corroborated by observable market data or quoted market prices for similar instruments. The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories and their classification within the valuation hierarchy at the end of fiscal 2021 and the third quarter of fiscal 2022 (in thousands): At the End of Fiscal 2021 Amortized Gross Unrealized Gross Unrealized Fair Cash Equivalents Marketable Securities Restricted Cash Level 1 Money market accounts $ — $ — $ — $ 49,984 $ 39,440 $ — $ 10,544 Level 2 U.S. government treasury notes 339,253 3,241 (1) 342,493 15,340 327,153 — U.S. government agencies 56,729 516 — 57,245 — 57,245 — Corporate debt securities 425,115 4,176 (33) 429,258 — 429,258 — Foreign government bonds 21,486 307 — 21,793 — 21,793 — Asset-backed securities 79,924 1,015 — 80,939 — 80,939 — Total $ 922,507 $ 9,255 $ (34) $ 981,712 $ 54,780 $ 916,388 $ 10,544 At the End of the Third Quarter of Fiscal 2022 Amortized Gross Unrealized Gross Unrealized Fair Cash Equivalents Marketable Restricted Cash Level 1 Money market accounts $ — $ — $ — $ 24,339 $ 13,795 $ — $ 10,544 Level 2 U.S. government treasury notes 335,607 1,250 (417) 336,440 — 336,440 — U.S. government agencies 50,147 170 (21) 50,296 — 50,296 — Corporate debt securities 484,325 1,263 (950) 484,638 — 484,638 — Foreign government bonds 14,885 112 (6) 14,991 — 14,991 — Asset-backed securities 69,273 277 (160) 69,390 — 69,390 — Municipal bonds 2,440 — (15) 2,425 — 2,425 — Total $ 956,677 $ 3,072 $ (1,569) $ 982,519 $ 13,795 $ 958,180 $ 10,544 The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands): At the End of the Third Quarter of Fiscal 2022 Amortized Cost Fair Value Due within one year $ 386,849 $ 388,804 Due in one to five years 565,898 565,486 Due in five to ten years 3,930 3,890 Total $ 956,677 $ 958,180 Unrealized losses on our debt securities have not been recorded into income because we do not intend to sell nor is it more likely than not that we will be required to sell these investments prior to recovery of their amortized cost basis. The decline in fair value of our debt securities is largely due to changes in credit spreads as a result of market conditions. The credit ratings associated with our debt securities are mostly unchanged, are highly rated and the issuers continue to make timely principal and interest payments. As a result, there were no credit losses in the third quarter and the first three quarters of fiscal 2021 and 2022. The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position at the end of fiscal 2021 and the third quarter of fiscal 2022, aggregated by investment category (in thousands): At the End of Fiscal 2021 Less than 12 months Greater than 12 months Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. government treasury notes $ 8,301 $ (1) $ — $ — $ 8,301 $ (1) Corporate debt securities 32,996 (33) — — 32,996 (33) Total $ 41,297 $ (34) $ — $ — $ 41,297 $ (34) At the End of the Third Quarter of Fiscal 2022 Less than 12 months Greater than 12 months Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. government treasury notes $ 206,574 $ (417) $ — $ — $ 206,574 $ (417) U.S. government agencies 14,559 (21) — — 14,559 (21) Corporate debt securities 271,555 (950) — — 271,555 (950) Foreign government bonds 1,823 (6) — — 1,823 (6) Asset-backed securities 26,718 (160) — — 26,718 (160) Municipal bonds 2,425 (15) — — 2,425 (15) Total $ 523,654 $ (1,569) $ — $ — $ 523,654 $ (1,569) Realized gains or losses on sale of marketable securities were not significant for all periods presented. Fair Value Measurements of Other Financial Instruments We measure the fair value of our convertible senior notes (the Notes) on a quarterly basis for disclosure purposes. We consider the fair value of the Notes at the end of the third quarter of fiscal 2022 to be a Level 2 measurement due to its limited trading activity. Refer to Note 6 for the carrying amount and estimated fair value of our Notes at the end of the third quarter of fiscal 2022.

Balance Sheet Components

Balance Sheet Components	9 Months Ended
	Oct. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Balance Sheet Components	Balance Sheet Components Inventory Inventory consists of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Raw materials $ 4,991 $ 10,609 Finished goods 41,742 33,427 Inventory $ 46,733 $ 44,036 Property and Equipment, Net Property and equipment, net consists of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Test equipment $ 238,069 $ 265,005 Computer equipment and software 184,518 210,503 Furniture and fixtures 8,484 8,534 Leasehold improvements 44,444 46,536 Total property and equipment 475,515 530,578 Less: accumulated depreciation and amortization (312,474) (337,437) Property and equipment, net $ 163,041 $ 193,141 Depreciation and amortization expense related to property and equipment was $14.9 million and $17.5 million for the third quarter of fiscal 2021 and 2022, and $41.1 million and $47.2 million for the first three quarters of fiscal 2021 and 2022. The amount of internal-use software development costs capitalized and related amortization expense during the third quarter and first three quarters of fiscal 2021 and 2022 were not material. Intangible Assets, Net Intangible assets, net consist of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Gross Carrying Value Accumulated Amortization Net Carrying Amount Gross Carrying Value Accumulated Amortization Net Carrying Amount Technology patents $ 19,125 $ (11,722) $ 7,403 $ 19,125 $ (13,232) $ 5,893 Developed technology 77,373 (17,499) 59,874 80,166 (26,841) 53,325 Customer relationships 6,459 (308) 6,151 6,459 (1,000) 5,459 Trade name 3,623 (403) 3,220 3,623 (1,308) 2,315 Intangible assets, net $ 106,580 $ (29,932) $ 76,648 $ 109,373 $ (42,381) $ 66,992 Intangible assets amortization expense was $3.3 million and $4.0 million for the third quarter of fiscal 2021 and 2022, and $8.7 million and $12.4 million for the first three quarters of fiscal 2021 and 2022. At the end of the third quarter of fiscal 2022, the weighted-average remaining amortization period was 2.2 years for technology patents, 4.2 years for developed technology, 5.9 years for customer relationships, and 1.9 years for trade name. We recorded amortization of technology patents in general and administrative expenses due to their defensive nature, developed technology in cost of product revenue, and customer relationships and trade name in sales and marketing expenses in the condensed consolidated statements of operations. At the end of the third quarter of fiscal 2022, future expected amortization expense for intangible assets is as follows (in thousands): Fiscal Years Ending Estimated Future Remainder of 2022 $ 4,061 2023 16,244 2024 15,841 2025 15,036 2026 12,483 Thereafter 3,327 Total $ 66,992 Goodwill As of the end of fiscal 2021 and the third quarter of fiscal 2022, goodwill was $358.7 million. There were no impairments to goodwill during the third quarter and first three quarters of fiscal 2021 and 2022. Accrued Expenses and Other Liabilities Accrued expenses and other liabilities consist of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Taxes payable $ 4,097 $ 2,339 Accrued marketing 15,638 10,072 Accrued travel and entertainment expenses 866 1,609 Acquisition consideration 9,600 3,465 Contract liabilities from contracts with customers — 18,802 Other accrued liabilities 31,553 37,597 Total accrued expenses and other liabilities $ 61,754 $ 73,884

Deferred Revenue and Commission

Deferred Revenue and Commissions	9 Months Ended
	Oct. 31, 2021
Revenue from Contract with Customer [Abstract]
Deferred Revenue and Commissions	Deferred Revenue and Commissions Deferred Commissions Deferred commissions consist of incremental costs paid to our sales force to obtain customer contracts. Changes in total deferred commissions during the periods presented are as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Beginning balance $ 144,687 $ 195,965 $ 139,204 $ 187,924 Additions 36,234 49,822 96,530 121,802 Recognition of deferred commissions (28,832) (37,467) (83,645) (101,406) Ending balance $ 152,089 $ 208,320 $ 152,089 $ 208,320 Of the $208.3 million total deferred commissions balance at the end of the third quarter of fiscal 2022, we expect to recognize approximately 30% as commission expense over the next 12 months and the remainder thereafter. There was no impairment related to capitalized commissions for the third quarter and first three quarters of fiscal 2021 and 2022. Deferred Revenue Deferred revenue primarily consists of amounts that have been invoiced but have not yet been recognized as revenue including performance obligations pertaining to subscription services. Changes in total deferred revenue during the periods presented are as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Beginning balance $ 724,751 $ 909,814 $ 697,288 $ 843,697 Additions 180,285 208,542 467,454 611,006 Recognition of deferred revenue (142,272) (168,606) (401,978) (504,953) Ending balance $ 762,764 $ 949,750 $ 762,764 $ 949,750 Revenue recognized during the third quarter of fiscal 2021 and 2022 from deferred revenue at the beginning of each respective period was $121.9 million and $163.2 million. Revenue recognized during the first three quarters of fiscal 2021 and 2022 from deferred revenue at the beginning of each respective period was $285.0 million and $356.2 million. Remaining Performance Obligations Total remaining performance obligations (RPO) which is contracted but not recognized revenue was $1.25 billion at the end of the third quarter of fiscal 2022. RPO consists of both deferred revenue and non-cancelable amounts that are expected to be invoiced and recognized as revenue in future periods. Product orders are generally cancelable until delivery has occurred, and as such unfulfilled product orders are excluded from RPO. Of the $1.25 billion contracted but not recognized revenue at the end of the third quarter of fiscal 2022, we expect to recognize approximately 45% over the next 12 months, and the remainder thereafter.

Debt

Debt	9 Months Ended
	Oct. 31, 2021
Debt Disclosure [Abstract]
Debt	Debt Convertible Senior Notes In April 2018, we issued $575.0 million in principal amount of 0.125% convertible senior notes due 2023, in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act and received proceeds of $562.1 million, after deducting the underwriters’ discounts and commissions. The Notes are governed by an indenture (the Indenture) between us, as the issuer, and U.S. Bank National Association, as trustee. The Notes are our senior unsecured obligations. The Indenture does not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by us or any of our subsidiaries. The Notes mature on April 15, 2023 unless repurchased or redeemed by us or converted in accordance with their terms prior to the maturity date. Interest is payable semi-annually in arrears on April 15 and October 15 of each year. The Notes are convertible for up to 21,884,155 shares of our common stock at an initial conversion rate of approximately 38.0594 shares of common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $26.27 per share of common stock, subject to adjustment. Holders of the Notes may surrender their Notes for conversion at their option at any time prior to the close of business on the business day immediately preceding October 15, 2022, only under the following circumstances: • during any fiscal quarter commencing after the fiscal quarter ended on July 31, 2018 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the Notes on each applicable trading day; • during the five business day period after any five consecutive trading day period (the measurement period), in which the trading price per $1,000 principal amount of Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate for the Notes on each such trading day; • if we call any or all of the Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or • upon the occurrence of specified corporate events. On or after October 15, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes at any time regardless of the foregoing circumstances. Upon conversion, holders will receive cash, shares of our common stock, or a combination of cash and shares of our common stock, at our election. We intend to settle the principal of the Notes in cash. The conversion price will be subject to adjustment in some events. Following certain corporate events that occur prior to the maturity date or following our issuance of a notice of redemption, we will increase the conversion rate for a holder who elects to convert its Notes in connection with such corporate event or during the related redemption period in certain circumstances. Additionally, upon the occurrence of a corporate event that constitutes a “fundamental change” per the Indenture, holders of the Notes may require us to repurchase for cash all or a portion of the Notes at a purchase price equal to 100% of the principal amount of the Notes plus accrued and unpaid contingent interest. Subsequent to April 19, 2021, we may redeem for cash all or any portion of the Notes, at our option, if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending not more than two trading days immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Notes. Upon the issuance of the Notes, we recorded total debt issuance costs of $12.9 million, of which $9.8 million was allocated to the Notes and $3.1 million was allocated to additional paid-in capital. The Notes consisted of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Liability: Principal $ 575,000 $ 575,000 Less: debt discount, net of amortization (64,515) (43,486) Less: debt issuance costs, net of amortization (4,671) (3,148) Net carrying amount of the Notes $ 505,814 $ 528,366 Stockholders' equity recorded at issuance: Allocated value of the conversion feature $ 136,333 Less: debt issuance costs (3,068) Additional paid-in capital $ 133,265 The total estimated fair value of the Notes at the end of the third quarter of fiscal 2022 was $686.5 million. The fair value was determined based on the closing trading price per $100 of the Notes as of the last day of trading for the period. The fair value of the Notes is primarily affected by the trading price of our common stock and market interest rates. Based on the closing price of our common stock of $26.86 on the last day of the third quarter of fiscal 2022, the if-converted value of the Notes of $587.8 million was greater than its principal amount. At the end of the third quarter of fiscal 2022, the remaining term of the Notes is approximately 17 months. The following table sets forth total interest expense recognized related to the Notes for the third quarter and first three quarters of fiscal 2021 and 2022 (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Amortization of debt discount $ 6,799 $ 7,184 $ 19,970 $ 21,029 Amortization of debt issuance costs 491 520 1,445 1,523 Total amortization of debt discount and debt issuance costs 7,290 7,704 21,415 22,552 Contractual interest expense 181 181 539 537 Total interest expense related to the Notes $ 7,471 $ 7,885 $ 21,954 $ 23,089 Effective interest rate of the liability component 5.6 % 5.6 % 5.6 % 5.6 % In connection with the offering of the Notes, we paid $64.6 million to enter into capped call transactions with certain of the underwriters and their affiliates (the Capped Calls), whereby we have the option to purchase a total of 21,884,155 shares of our common stock upon any conversion of Notes and/or offset any cash payments we are required to make in excess of the principal amount of the Notes, as the case may be, with such reduction or offset subject to a cap initially equal to $39.66 per share (which represents a premium of 100% over the last reported sales price of our common stock on April 4, 2018), subject to certain adjustments (the Cap Price). The cost of the Capped Calls was accounted for as a reduction to additional paid-in capital on the condensed consolidated balance sheet. The Capped Calls are intended to reduce or offset potential dilution of our common stock upon any conversion of the Notes, subject to a cap based on the Cap Price. Impact on Earnings Per Share The Notes will not impact our diluted earnings per share until the average market price of our common stock exceeds the conversion price of $26.27 per share, as we intend to settle the principal amount of the Notes in cash upon conversion. We are required under the treasury stock method to compute the potentially dilutive shares of common stock related to the Notes for periods we report net income. However, upon conversion, there will be no economic dilution from the Notes until the average market price of our common stock exceeds the Cap Price of $39.66 per share, as exercise of the Capped Calls offsets any dilution from the Notes from the conversion price up to the Cap Price. Capped Calls are excluded from the calculation of diluted earnings per share, as they would be anti-dilutive under the treasury stock method. Revolving Credit Facility On August 24, 2020, we entered into a Credit Agreement with a consortium of financial institutions and lenders that provides for a five-year, senior secured revolving credit facility of $300.0 million (Credit Facility). Proceeds from the Credit Facility may be used for general corporate purposes and working capital. The Credit Facility expires, absent default or early termination by us, on the earlier of (i) August 24, 2025 or (ii) 91 days prior to the stated maturity of the Notes unless, on such date and each subsequent day until the Notes are paid in full, the sum of our cash, cash equivalents and marketable securities and the aggregate unused commitments then available to us exceed $625.0 million. The annual interest rates applicable to loans under the Credit Facility are, at our option, equal to either a base rate plus a margin ranging from 0.50% to 1.25% or LIBOR (based on one, three or six-month interest periods), subject to a floor of 0%, plus a margin ranging from 1.50% to 2.25%. Interest on revolving loans is payable quarterly in arrears with respect to loans based on the base rate and at the end of an interest period in the case of loans based on LIBOR (or at each three-month interval if the interest period is longer than three months). We are also required to pay a commitment fee on the unused portion of the commitments ranging from 0.25% to 0.40% per annum, payable quarterly in arrears. In September 2020, we drew down $250.0 million under the Credit Facility which remained outstanding at the end of the third quarter of fiscal 2022. The outstanding loan bore weighted-average interest at the one-month LIBOR of approximately 1.65% and 1.59% resulting in interest expense of $0.3 million and $1.0 million during the third quarter of fiscal 2021 and 2022 and 1.60% resulting in interest expense of $3.0 million during the first three quarters of fiscal 2022. Loans under the Credit Facility are collateralized by substantially all of our assets and subject to certain restrictions and two financial ratios measured as of the last day of each fiscal quarter: a Consolidated Leverage Ratio not to exceed 4.5:1 and an Interest Coverage Ratio not to be less than 3:1. We were in compliance with all covenants under the Credit Facility at the end of the third quarter of fiscal 2022.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit At the end of fiscal 2021 and the third quarter of fiscal 2022, we had outstanding letters of credit in the aggregate amount of $6.7 million in connection with our facility leases. The letters of credit are collateralized by restricted cash and mature on various dates through August 2029. Legal Matters From time to time, we have become involved in claims and other legal matters arising in the normal course of business. We investigate these claims as they arise. Although claims are inherently unpredictable, we currently are not aware of any matters that we expect to have a material adverse effect on our business, financial position, results of operations or cash flows. Accordingly, we have not recorded any loss contingency on our condensed consolidated balance sheet at the end of the third quarter of fiscal 2022. Indemnification Our arrangements generally include certain provisions for indemnifying customers against liabilities if our products or services infringe a third party’s intellectual property rights. Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities. It is not possible to determine the maximum potential amount under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. To date, we have not incurred any material costs as a result of such obligations and have not accrued any liabilities related to such obligations in the condensed consolidated financial statements. In addition, we indemnify our officers, directors and certain key employees while they are serving in good faith in their respective capacities. To date, there have been no claims under any indemnification provisions.

Leases

Leases	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Leases	Leases We lease office facilities under non-cancelable operating lease agreements expiring through July 2032. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. The components of lease costs related to our operating leases during the periods presented were as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Fixed operating lease cost $ 9,494 $ 9,652 $ 27,775 $ 28,717 Variable lease cost (1) 2,455 2,851 7,397 6,499 Short-term lease cost (12 months or less) 1,502 851 4,568 2,984 Total lease cost $ 13,451 $ 13,354 $ 39,740 $ 38,200 ____________________________________ (1) Variable lease cost predominantly included common area maintenance charges. At the end of the third quarter of fiscal 2022, the weighted-average remaining lease term for our operating leases was 4.7 years and the weighted-average discount rate for our operating leases was 5.75%. Future lease payments under our non-cancelable operating leases at the end of the third quarter of fiscal 2022 were as follows (in thousands): Fiscal Years Ending Operating Leases The remainder of 2022 $ 13,125 2023 38,213 2024 32,616 2025 27,859 2026 19,322 Thereafter 24,371 Total future lease payments 155,506 Less: imputed interest (21,414) Present value of lease liabilities $ 134,092

Restructuring and Other

Restructuring and Other	9 Months Ended
	Oct. 31, 2021
Restructuring and Related Activities [Abstract]
Restructuring and Other	Restructuring and Other During the first three quarters of fiscal 2021, we ceased use of certain leased facilities. The unamortized costs of $7.5 million relating to operating lease right-of-use assets and leasehold improvements for these leases were expensed. During the first three quarters of fiscal 2021, we effected workforce realignment plans to streamline our operations and recognized $6.6 million of restructuring costs related to involuntary termination benefit costs. The restructuring charges are included in restructuring and other expenses in our condensed consolidated statement of operations. During the first three quarters of fiscal 2021, we incurred incremental costs of $9.8 million directly related to the COVID-19 pandemic. These costs primarily included the write-off of marketing commitments no longer deemed to have value for the remainder of fiscal 2021, estimated non-recoverable costs for internal events that could not be held, and hazard related premiums to support manufacturing operations. Of these costs, $8.9 million is included in restructuring and other expenses and $0.9 million is included in cost of revenue in our condensed consolidated statements of operations for the first three quarters of fiscal 2021.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Oct. 31, 2021
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity Preferred Stock We have 20,000,000 authorized shares of undesignated preferred stock, the rights, preferences and privileges of which may be designated from time to time by our board of directors. At the end of the third quarter of fiscal 2022, there were no shares of preferred stock issued or outstanding. Class A and Class B Common Stock We have two classes of authorized common stock, Class A common stock, which we refer to as our "common stock", and Class B common stock. At the end of the third quarter of fiscal 2022, we had 2,000,000,000 authorized shares of Class A common stock and 250,000,000 authorized shares of Class B common stock, with each class having a par value of $0.0001 per share. At the end of the third quarter of fiscal 2022, 290,081,069 shares of Class A common stock were issued and outstanding. Share Repurchase Program In February 2021, our board of directors authorized the repurchase of up to an additional $200.0 million of our common stock. During the third quarter of fiscal 2022, we repurchased and retired 2,361,318 shares of common stock at an average purchase price of $23.79 per share for an aggregate repurchase price of $56.2 million. During the first three quarters of fiscal 2022, we repurchased and retired 6,057,084 shares of common stock at an average purchase price of $21.54 per share for an aggregate repurchase price of $130.5 million. At the end of the third quarter of fiscal 2022, $69.5 million remained available for future share repurchases under our current repurchase authorization.

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Oct. 31, 2021
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans	Equity Incentive Plans Equity Incentive Plans We maintain two equity incentive plans: the 2009 Equity Incentive Plan (the 2009 Plan) and the 2015 Equity Incentive Plan (the 2015 Plan). The 2015 Plan serves as the successor to our 2009 Plan and provides for grants of incentive stock options to our employees and non-statutory stock options, stock appreciation rights, restricted stock, restricted stock units (RSUs), performance stock awards, performance cash awards, and other forms of stock awards to our employees, directors and consultants. Our equity awards generally vest over a two We net-share settle equity awards held by certain employees by withholding shares upon vesting to satisfy tax withholding obligations. The shares withheld to satisfy employee tax withholding obligations are returned to our 2015 Plan and will be available for future issuance. Payments for employees’ tax obligations to the tax authorities are recognized as a reduction to additional paid-in capital and reflected as a financing activity in our condensed consolidated statements of cash flows. 2015 Amended and Restated Employee Stock Purchase Plan Under our Amended and Restated 2015 Employee Stock Purchase Plan (2015 ESPP), our board of directors (or a committee thereof) has the authority to establish the length and terms of the offering periods and purchase periods and the purchase price of the shares of common stock which may be purchased under the plan. The current offering terms allow eligible employees to purchase shares of our common stock at a discount through payroll deductions of up to 30% of their eligible compensation, subject to a cap of 3,000 shares on any purchase date, a dollar cap of $7,500 per purchase period, or $25,000 in any calendar year (as determined under applicable tax rules). The current terms also allow for a 24-month offering period beginning March 16th and September 16th of each year, with each offering period consisting of four 6-month purchase periods, subject to a reset provision. Further, currently, on each purchase date, eligible employees may purchase our common stock at a price per share equal to 85% of the lesser of the fair market value of our common stock (1) on the first trading day of the applicable offering period or (2) the purchase date. Under the reset provision currently authorized, if the closing stock price on the offering date of a new offering falls below the closing stock price on the offering date of an ongoing offering, the ongoing offering would terminate immediately following the purchase of ESPP shares on the purchase date immediately preceding the new offering and participants in the terminated ongoing offering would automatically be enrolled in the new offering (ESPP reset), resulting in a modification charge to be recognized over the new offering period. During the first quarter of fiscal 2021, there was an ESPP reset that resulted in a modification charge of $23.8 million, which is being recognized over an offering period ending March 15, 2022. There was no ESPP reset during the first three quarters of fiscal 2022. Stock-based compensation expense related to our 2015 ESPP was $6.8 million and $8.9 million during the third quarter of fiscal 2021 and 2022, and $18.8 million and $25.3 million during the first three quarters of fiscal 2021 and 2022. At the end of the third quarter of fiscal 2022, total unrecognized stock-based compensation cost related to our 2015 ESPP was $21.0 million, which is expected to be recognized over a weighted-average period of 0.8 years. Stock Options A summary of the stock option activity under our equity incentive plans and related information is as follows: Options Outstanding Number of Weighted- Weighted- Aggregate Balance at the end of fiscal 2021 18,558,974 $ 9.60 4.3 $ 251,503 Options exercised (3,983,273) 8.42 Options forfeited (286,550) 11.24 Balance at the end of the third quarter of fiscal 2022 14,289,151 $ 9.90 3.6 $ 242,811 Vested and exercisable at the end of the third quarter of fiscal 2022 13,250,654 $ 10.32 3.4 $ 219,225 The aggregate intrinsic value of options vested and exercisable at the end of the third quarter of fiscal 2022 is calculated based on the difference between the exercise price and the closing price of $26.86 of our common stock on the last day of the third quarter of fiscal 2022. Stock-based compensation expense recognized related to stock options was $1.6 million and $1.7 million during the third quarter of fiscal 2021 and 2022, and $5.7 million and $6.0 million during the first three quarters of fiscal 2021 and 2022. At the end of the third quarter of fiscal 2022, total unrecognized employee stock-based compensation cost related to outstanding options was $9.3 million, which is expected to be recognized over a weighted-average period of 1.8 years. RSUs A summary of the RSU activity under our equity incentive plans and related information is as follows: Number of Weighted- Aggregate Unvested balance at the end of fiscal 2021 30,830,082 $ 15.77 $ 712,657 Granted 14,808,923 22.11 Vested (9,875,551) 16.77 Forfeited (4,845,679) 16.25 Unvested balance at the end of the third quarter of fiscal 2022 30,917,775 $ 18.36 $ 830,451 RSUs granted during the third quarter and first three quarters of fiscal 2022 include 263,995 and 1,500,000 shares of performance RSUs, at a target percentage of 100%, with both performance and service vesting conditions payable in common stock, from 0% to 150% of the target number granted, contingent upon the degree to which the performance condition is met. Any portion of shares that are not earned will be canceled. Stock-based compensation expense recognized related to RSUs was $50.4 million and $65.0 million during the third quarter of fiscal 2021 and 2022, and $147.4 million and $174.9 million during the first three quarters of fiscal 2021 and 2022. At the end of the third quarter of fiscal 2022, total unrecognized employee stock-based compensation cost related to unvested RSUs was $521.9 million, which is expected to be recognized over a weighted-average period of 2.7 years. Restricted Stock A summary of the restricted stock activity under our 2015 Plan and related information is as follows: Number of Weighted- Aggregate Unvested balance at the end of fiscal 2021 557,836 $ 19.06 $ 12,903 Vested (385,711) 18.60 Forfeited (62,172) 20.22 Unvested balance at the end of the third quarter of fiscal 2022 109,953 $ 20.04 $ 2,953 All unvested shares of restricted stock are subject to cancellation to the extent vesting conditions are not met. Stock-based compensation expense recognized related to restricted stock was $0.8 million and $0.4 million during the third quarter of fiscal 2021 and 2022, and $7.9 million and $1.6 million during the first three quarters of fiscal 2021 and 2022. At the end of the third quarter of fiscal 2022, total unrecognized employee compensation cost related to unvested restricted stock was $0.2 million, which is expected to be recognized over a weighted-average period of 0.4 years. Stock-Based Compensation Expense The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Cost of revenue—product $ 1,027 $ 1,634 $ 3,013 $ 4,547 Cost of revenue—subscription services 3,883 5,555 10,961 15,098 Research and development 29,220 36,797 87,770 102,343 Sales and marketing 14,898 19,151 48,018 54,317 General and administrative 10,581 12,863 29,993 31,458 Total stock-based compensation expense $ 59,609 $ 76,000 $ 179,755 $ 207,763 The tax benefit related to stock-based compensation expense for all periods presented was not material.

Net Loss per Share Attributable

Net Loss per Share Attributable to Common Stockholders	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Net Loss per Share Attributable to Common Stockholders	Net Loss per Share Attributable to Common StockholdersBasic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. Basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share attributable to common stockholders is computed by giving effect to all potentially dilutive common stock equivalents, including our outstanding stock options, common stock related to unvested RSUs, unvested restricted stock, our Notes to the extent dilutive, and common stock issuable pursuant to the ESPP. These potentially dilutive common stock equivalents have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive. The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Net loss $ (74,222) $ (28,731) $ (229,783) $ (158,202) Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted 269,144 287,462 265,626 283,918 Net loss per share attributable to common stockholders, basic and diluted $ (0.28) $ (0.10) $ (0.87) $ (0.56) The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Stock options to purchase common stock 22,687 15,194 23,884 16,623 Unvested restricted stock units 32,802 32,937 31,743 33,541 Unvested restricted stock 964 176 1,301 319 Shares related to convertible senior notes 21,884 21,884 21,884 21,884 Shares issuable pursuant to the ESPP 1,080 1,121 1,080 1,121 Total 79,417 71,312 79,892 73,488

Other Income (Expense), Net

Other Income (Expense), Net	9 Months Ended
	Oct. 31, 2021
Other Income and Expenses [Abstract]
Other Income (Expense), Net	Other Income (Expense), Net Other income (expense), net consists of the following (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Interest income (1) $ 3,728 $ 2,082 $ 14,383 $ 7,186 Interest expense (2) (7,989) (9,103) (22,573) (26,767) Foreign currency transactions gains (losses) (699) (1,729) (277) (2,927) Other income 73 797 1,767 2,418 Total other income (expense), net $ (4,887) $ (7,953) $ (6,700) $ (20,090) ____________________________________ (1) Interest income includes interest income related to our cash, cash equivalents and marketable securities and non-cash interest income (expense) related to accretion (amortization) of the discount (premium) on marketable securities. (2) Interest expense includes non-cash interest expense related to amortization of the debt discount and debt issuance costs and the contractual interest expense related to our debt.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our provision for income tax primarily reflects taxes on international operations and state income taxes. The difference between the income tax provision that would be derived by applying the statutory rate to our loss before income taxes and the income tax provision recorded was primarily attributable to changes in our valuation allowance, U.S. taxes on foreign income and research and development credits. At the end of the third quarter of fiscal 2022, there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for fiscal 2021.

Segment Information

Segment Information	9 Months Ended
	Oct. 31, 2021
Segment Reporting [Abstract]
Segment Information	Segment Information Our chief operating decision maker is our Chief Executive Officer . Our chief operating decision maker reviews financial information presented on a consolidated basis fo r purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations or operating results. Accordingly, we have a single reportable segment. Disaggregation of Revenue The following table depicts the disaggregation of revenue by geographic area based on the billing address of our customers and is consistent with how we evaluate our financial performance (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 United States $ 302,091 $ 408,732 $ 847,916 $ 1,057,015 Rest of the world 108,528 154,008 333,545 415,263 Total revenue $ 410,619 $ 562,740 $ 1,181,461 $ 1,472,278 Long-Lived Assets by Geographic Area Long-lived assets, which are comprised of property and equipment, net, by geographic area are summarized as follows (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 United States $ 152,859 $ 185,282 Rest of the world 10,182 7,859 Total long-lived assets $ 163,041 $ 193,141

Basis of Presentation and Sum_2

Basis of Presentation and Summary of Significant Accounting Policies - (Policies)	9 Months Ended
	Oct. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation In September 2019, we adopted a 52/53 week fiscal year consisting of four 13-week quarters ending on the first Sunday after January 30, which for fiscal 2021 was January 31, 2021 and for fiscal 2022 will be February 6, 2022. The third quarter of fiscal 2021 and 2022 ended on November 1, 2020 and October 31, 2021. Unless otherwise stated, all dates refer to our fiscal year and fiscal periods. The condensed consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. There were no material changes in the third quarter of fiscal 2022 to our significant accounting policies as described in our Annual Report on Form 10-K for fiscal 2021.
Unaudited Interim Consolidated Financial Information	Unaudited Interim Consolidated Financial Information The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for fiscal 2021. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2022 or any future period.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates and assumptions due to risks and uncertainties, including uncertainty in the current economic environment from the ongoing COVID-19 pandemic. Such estimates include, but are not limited to, the determination of standalone selling price for revenue arrangements with multiple performance obligations, useful lives of intangible assets and property and equipment, the period of benefit for deferred contract costs for commissions, stock-based compensation, provision for income taxes including related reserves, and the fair value of equity assumed, intangible and tangible assets acquired and liabilities assumed for business combinations. Management bases its estimates on historical experience and on various other assumptions which management believes to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Restricted Cash	Restricted CashRestricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program.
Recent Accounting Pronouncements Adopted and Not Yet Adopted	Recent Accounting Pronouncements Not Yet Adopted In March 2020, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting , which provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships, and other transactions affected by the reference rate reform if certain criteria are met. The amendments apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. In January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848) which refines the scope of Topic 848 and clarifies some of its guidance. The amendments are effective for all entities as of March 12, 2020 through December 31, 2022. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In August 2020, the FASB issued ASU 2020-06, Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain convertible instruments, amends guidance on derivative scope exceptions for contracts in an entity's own equity, and modifies the guidance on diluted earnings per share calculations as a result of these changes. The standard will be effective for us beginning February 7, 2022 and can be applied on either a fully retrospective or modified retrospective basis. We are currently evaluating the impact of this standard on our condensed consolidated financial statements.
Fair Value Measurements	Fair Value Measurements We define fair value as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value: • Level 1 - Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities; • Level 2 - Observable inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments; and • Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on our own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation.

Financial Instruments - (Tables

Financial Instruments - (Tables)	9 Months Ended
	Oct. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Cash Equivalents, Marketable Securities and Restricted Cash	The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories and their classification within the valuation hierarchy at the end of fiscal 2021 and the third quarter of fiscal 2022 (in thousands): At the End of Fiscal 2021 Amortized Gross Unrealized Gross Unrealized Fair Cash Equivalents Marketable Securities Restricted Cash Level 1 Money market accounts $ — $ — $ — $ 49,984 $ 39,440 $ — $ 10,544 Level 2 U.S. government treasury notes 339,253 3,241 (1) 342,493 15,340 327,153 — U.S. government agencies 56,729 516 — 57,245 — 57,245 — Corporate debt securities 425,115 4,176 (33) 429,258 — 429,258 — Foreign government bonds 21,486 307 — 21,793 — 21,793 — Asset-backed securities 79,924 1,015 — 80,939 — 80,939 — Total $ 922,507 $ 9,255 $ (34) $ 981,712 $ 54,780 $ 916,388 $ 10,544 At the End of the Third Quarter of Fiscal 2022 Amortized Gross Unrealized Gross Unrealized Fair Cash Equivalents Marketable Restricted Cash Level 1 Money market accounts $ — $ — $ — $ 24,339 $ 13,795 $ — $ 10,544 Level 2 U.S. government treasury notes 335,607 1,250 (417) 336,440 — 336,440 — U.S. government agencies 50,147 170 (21) 50,296 — 50,296 — Corporate debt securities 484,325 1,263 (950) 484,638 — 484,638 — Foreign government bonds 14,885 112 (6) 14,991 — 14,991 — Asset-backed securities 69,273 277 (160) 69,390 — 69,390 — Municipal bonds 2,440 — (15) 2,425 — 2,425 — Total $ 956,677 $ 3,072 $ (1,569) $ 982,519 $ 13,795 $ 958,180 $ 10,544
Amortized Cost and Estimated Fair Value	The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands): At the End of the Third Quarter of Fiscal 2022 Amortized Cost Fair Value Due within one year $ 386,849 $ 388,804 Due in one to five years 565,898 565,486 Due in five to ten years 3,930 3,890 Total $ 956,677 $ 958,180
Gross Unrealized Losses and Fair Values	The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position at the end of fiscal 2021 and the third quarter of fiscal 2022, aggregated by investment category (in thousands): At the End of Fiscal 2021 Less than 12 months Greater than 12 months Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. government treasury notes $ 8,301 $ (1) $ — $ — $ 8,301 $ (1) Corporate debt securities 32,996 (33) — — 32,996 (33) Total $ 41,297 $ (34) $ — $ — $ 41,297 $ (34) At the End of the Third Quarter of Fiscal 2022 Less than 12 months Greater than 12 months Total Fair Unrealized Fair Unrealized Fair Unrealized U.S. government treasury notes $ 206,574 $ (417) $ — $ — $ 206,574 $ (417) U.S. government agencies 14,559 (21) — — 14,559 (21) Corporate debt securities 271,555 (950) — — 271,555 (950) Foreign government bonds 1,823 (6) — — 1,823 (6) Asset-backed securities 26,718 (160) — — 26,718 (160) Municipal bonds 2,425 (15) — — 2,425 (15) Total $ 523,654 $ (1,569) $ — $ — $ 523,654 $ (1,569)

Balance Sheet Components - (Tab

Balance Sheet Components - (Tables)	9 Months Ended
	Oct. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Inventory	Inventory consists of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Raw materials $ 4,991 $ 10,609 Finished goods 41,742 33,427 Inventory $ 46,733 $ 44,036
Property and Equipment, Net	Property and equipment, net consists of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Test equipment $ 238,069 $ 265,005 Computer equipment and software 184,518 210,503 Furniture and fixtures 8,484 8,534 Leasehold improvements 44,444 46,536 Total property and equipment 475,515 530,578 Less: accumulated depreciation and amortization (312,474) (337,437) Property and equipment, net $ 163,041 $ 193,141
Intangible Assets, Net	Intangible assets, net consist of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Gross Carrying Value Accumulated Amortization Net Carrying Amount Gross Carrying Value Accumulated Amortization Net Carrying Amount Technology patents $ 19,125 $ (11,722) $ 7,403 $ 19,125 $ (13,232) $ 5,893 Developed technology 77,373 (17,499) 59,874 80,166 (26,841) 53,325 Customer relationships 6,459 (308) 6,151 6,459 (1,000) 5,459 Trade name 3,623 (403) 3,220 3,623 (1,308) 2,315 Intangible assets, net $ 106,580 $ (29,932) $ 76,648 $ 109,373 $ (42,381) $ 66,992
Expected Amortization Expenses for Intangible Assets	At the end of the third quarter of fiscal 2022, future expected amortization expense for intangible assets is as follows (in thousands): Fiscal Years Ending Estimated Future Remainder of 2022 $ 4,061 2023 16,244 2024 15,841 2025 15,036 2026 12,483 Thereafter 3,327 Total $ 66,992
Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities consist of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Taxes payable $ 4,097 $ 2,339 Accrued marketing 15,638 10,072 Accrued travel and entertainment expenses 866 1,609 Acquisition consideration 9,600 3,465 Contract liabilities from contracts with customers — 18,802 Other accrued liabilities 31,553 37,597 Total accrued expenses and other liabilities $ 61,754 $ 73,884

Deferred Revenue and Commissi_2

Deferred Revenue and Commissions - (Tables)	9 Months Ended
	Oct. 31, 2021
Revenue from Contract with Customer [Abstract]
Deferred Commissions	Changes in total deferred commissions during the periods presented are as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Beginning balance $ 144,687 $ 195,965 $ 139,204 $ 187,924 Additions 36,234 49,822 96,530 121,802 Recognition of deferred commissions (28,832) (37,467) (83,645) (101,406) Ending balance $ 152,089 $ 208,320 $ 152,089 $ 208,320
Deferred Revenue	Changes in total deferred revenue during the periods presented are as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Beginning balance $ 724,751 $ 909,814 $ 697,288 $ 843,697 Additions 180,285 208,542 467,454 611,006 Recognition of deferred revenue (142,272) (168,606) (401,978) (504,953) Ending balance $ 762,764 $ 949,750 $ 762,764 $ 949,750

Debt - (Tables)

Debt - (Tables)	9 Months Ended
	Oct. 31, 2021
Debt Disclosure [Abstract]
Convertible Debt	The Notes consisted of the following (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 Liability: Principal $ 575,000 $ 575,000 Less: debt discount, net of amortization (64,515) (43,486) Less: debt issuance costs, net of amortization (4,671) (3,148) Net carrying amount of the Notes $ 505,814 $ 528,366 Stockholders' equity recorded at issuance: Allocated value of the conversion feature $ 136,333 Less: debt issuance costs (3,068) Additional paid-in capital $ 133,265
Interest Expense	The following table sets forth total interest expense recognized related to the Notes for the third quarter and first three quarters of fiscal 2021 and 2022 (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Amortization of debt discount $ 6,799 $ 7,184 $ 19,970 $ 21,029 Amortization of debt issuance costs 491 520 1,445 1,523 Total amortization of debt discount and debt issuance costs 7,290 7,704 21,415 22,552 Contractual interest expense 181 181 539 537 Total interest expense related to the Notes $ 7,471 $ 7,885 $ 21,954 $ 23,089 Effective interest rate of the liability component 5.6 % 5.6 % 5.6 % 5.6 %

Leases - (Tables)

Leases - (Tables)	9 Months Ended
	Oct. 31, 2021
Leases [Abstract]
Lease costs	The components of lease costs related to our operating leases during the periods presented were as follows (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Fixed operating lease cost $ 9,494 $ 9,652 $ 27,775 $ 28,717 Variable lease cost (1) 2,455 2,851 7,397 6,499 Short-term lease cost (12 months or less) 1,502 851 4,568 2,984 Total lease cost $ 13,451 $ 13,354 $ 39,740 $ 38,200 ____________________________________ (1) Variable lease cost predominantly included common area maintenance charges.
Future minimum lease payments	Future lease payments under our non-cancelable operating leases at the end of the third quarter of fiscal 2022 were as follows (in thousands): Fiscal Years Ending Operating Leases The remainder of 2022 $ 13,125 2023 38,213 2024 32,616 2025 27,859 2026 19,322 Thereafter 24,371 Total future lease payments 155,506 Less: imputed interest (21,414) Present value of lease liabilities $ 134,092

Equity Incentive Plans - (Table

Equity Incentive Plans - (Tables)	9 Months Ended
	Oct. 31, 2021
Share-based Payment Arrangement [Abstract]
Equity Incentive Plans	A summary of the stock option activity under our equity incentive plans and related information is as follows: Options Outstanding Number of Weighted- Weighted- Aggregate Balance at the end of fiscal 2021 18,558,974 $ 9.60 4.3 $ 251,503 Options exercised (3,983,273) 8.42 Options forfeited (286,550) 11.24 Balance at the end of the third quarter of fiscal 2022 14,289,151 $ 9.90 3.6 $ 242,811 Vested and exercisable at the end of the third quarter of fiscal 2022 13,250,654 $ 10.32 3.4 $ 219,225
Restricted Stock Units and Performance Restricted Stock Units	A summary of the RSU activity under our equity incentive plans and related information is as follows: Number of Weighted- Aggregate Unvested balance at the end of fiscal 2021 30,830,082 $ 15.77 $ 712,657 Granted 14,808,923 22.11 Vested (9,875,551) 16.77 Forfeited (4,845,679) 16.25 Unvested balance at the end of the third quarter of fiscal 2022 30,917,775 $ 18.36 $ 830,451
Restricted Stock	A summary of the restricted stock activity under our 2015 Plan and related information is as follows: Number of Weighted- Aggregate Unvested balance at the end of fiscal 2021 557,836 $ 19.06 $ 12,903 Vested (385,711) 18.60 Forfeited (62,172) 20.22 Unvested balance at the end of the third quarter of fiscal 2022 109,953 $ 20.04 $ 2,953
Stock-Based Compensation	The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Cost of revenue—product $ 1,027 $ 1,634 $ 3,013 $ 4,547 Cost of revenue—subscription services 3,883 5,555 10,961 15,098 Research and development 29,220 36,797 87,770 102,343 Sales and marketing 14,898 19,151 48,018 54,317 General and administrative 10,581 12,863 29,993 31,458 Total stock-based compensation expense $ 59,609 $ 76,000 $ 179,755 $ 207,763

Net Loss per Share Attributab_2

Net Loss per Share Attributable to Common Stockholders - (Tables)	9 Months Ended
	Oct. 31, 2021
Earnings Per Share [Abstract]
Net Loss per Share	The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Net loss $ (74,222) $ (28,731) $ (229,783) $ (158,202) Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted 269,144 287,462 265,626 283,918 Net loss per share attributable to common stockholders, basic and diluted $ (0.28) $ (0.10) $ (0.87) $ (0.56)
Shares Excluded	The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Stock options to purchase common stock 22,687 15,194 23,884 16,623 Unvested restricted stock units 32,802 32,937 31,743 33,541 Unvested restricted stock 964 176 1,301 319 Shares related to convertible senior notes 21,884 21,884 21,884 21,884 Shares issuable pursuant to the ESPP 1,080 1,121 1,080 1,121 Total 79,417 71,312 79,892 73,488

Other Income (Expense), Net - (

Other Income (Expense), Net - (Tables)	9 Months Ended
	Oct. 31, 2021
Other Income and Expenses [Abstract]
Summary of Other Income (Expense)	Other income (expense), net consists of the following (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 Interest income (1) $ 3,728 $ 2,082 $ 14,383 $ 7,186 Interest expense (2) (7,989) (9,103) (22,573) (26,767) Foreign currency transactions gains (losses) (699) (1,729) (277) (2,927) Other income 73 797 1,767 2,418 Total other income (expense), net $ (4,887) $ (7,953) $ (6,700) $ (20,090) ____________________________________ (1) Interest income includes interest income related to our cash, cash equivalents and marketable securities and non-cash interest income (expense) related to accretion (amortization) of the discount (premium) on marketable securities. (2) Interest expense includes non-cash interest expense related to amortization of the debt discount and debt issuance costs and the contractual interest expense related to our debt.

Segment Information - (Tables)

Segment Information - (Tables)	9 Months Ended
	Oct. 31, 2021
Segment Reporting [Abstract]
Revenue by Geographic Area	The following table depicts the disaggregation of revenue by geographic area based on the billing address of our customers and is consistent with how we evaluate our financial performance (in thousands): Third Quarter of Fiscal First Three Quarters of Fiscal 2021 2022 2021 2022 United States $ 302,091 $ 408,732 $ 847,916 $ 1,057,015 Rest of the world 108,528 154,008 333,545 415,263 Total revenue $ 410,619 $ 562,740 $ 1,181,461 $ 1,472,278
Long-Lived Assets by Geographic Area	Long-lived assets, which are comprised of property and equipment, net, by geographic area are summarized as follows (in thousands): At the End of Fiscal 2021 Third Quarter of Fiscal 2022 United States $ 152,859 $ 185,282 Rest of the world 10,182 7,859 Total long-lived assets $ 163,041 $ 193,141

Basis of Presentation and Sum_3

Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021	Nov. 01, 2020
Accounting Policies [Abstract]
Restricted cash	$ 10,544	$ 10,544	$ 11,349

Financial Instruments - Cash Eq

Financial Instruments - Cash Equivalents, Marketable Securities and Restricted Cash (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 958,180
Cash Equivalents	13,795	$ 54,780
Marketable securities	958,180	916,388
Restricted Cash	10,544	10,544
Amortized Cost	956,677	922,507
Total gross unrealized gains	3,072	9,255
Total gross unrealized losses	(1,569)	(34)
Total fair value	982,519	981,712
Level 1 | Money market accounts
Debt Securities, Available-for-sale [Line Items]
Fair Value	24,339	49,984
Cash Equivalents	13,795	39,440
Marketable securities	0	0
Restricted Cash	10,544	10,544
Level 2 | U.S. government treasury notes
Debt Securities, Available-for-sale [Line Items]
Total	335,607	339,253
Gross Unrealized Gains	1,250	3,241
Gross Unrealized Losses	(417)	(1)
Fair Value	336,440	342,493
Cash Equivalents	0	15,340
Marketable securities	336,440	327,153
Restricted Cash	0	0
Level 2 | U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Total	50,147	56,729
Gross Unrealized Gains	170	516
Gross Unrealized Losses	(21)	0
Fair Value	50,296	57,245
Cash Equivalents	0	0
Marketable securities	50,296	57,245
Restricted Cash	0	0
Level 2 | Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Total	484,325	425,115
Gross Unrealized Gains	1,263	4,176
Gross Unrealized Losses	(950)	(33)
Fair Value	484,638	429,258
Cash Equivalents	0	0
Marketable securities	484,638	429,258
Restricted Cash	0	0
Level 2 | Foreign government bonds
Debt Securities, Available-for-sale [Line Items]
Total	14,885	21,486
Gross Unrealized Gains	112	307
Gross Unrealized Losses	(6)	0
Fair Value	14,991	21,793
Cash Equivalents	0	0
Marketable securities	14,991	21,793
Restricted Cash	0	0
Level 2 | Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Total	69,273	79,924
Gross Unrealized Gains	277	1,015
Gross Unrealized Losses	(160)	0
Fair Value	69,390	80,939
Cash Equivalents	0	0
Marketable securities	69,390	80,939
Restricted Cash	0	$ 0
Level 2 | Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total	2,440
Gross Unrealized Gains	0
Gross Unrealized Losses	(15)
Fair Value	2,425
Cash Equivalents	0
Marketable securities	2,425
Restricted Cash	$ 0

Financial Instruments - Amortiz

Financial Instruments - Amortized Cost and Estimated Fair Value (Details) - USD ($)	Oct. 31, 2021	Nov. 01, 2020
Amortized Cost
Due within one year	$ 386,849,000
Due in one to five years	565,898,000
Due in five to ten years	3,930,000
Total	956,677,000
Fair Value
Due within one year	388,804,000
Due in one to five years	565,486,000
Due in five to ten years	3,890,000
Total	958,180,000
Impairment charge for unrealized losses	$ 0	$ 0

Financial Instruments - Gross U

Financial Instruments - Gross Unrealized Losses and Fair Values (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	$ 523,654	$ 41,297
Unrealized Loss, Less than 12 Months	(1,569)	(34)
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Fair Value, Total	523,654	41,297
Unrealized Loss, Total	(1,569)	(34)
U.S. government treasury notes
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	206,574	8,301
Unrealized Loss, Less than 12 Months	(417)	(1)
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Fair Value, Total	206,574	8,301
Unrealized Loss, Total	(417)	(1)
U.S. government agencies
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	14,559
Unrealized Loss, Less than 12 Months	(21)
Fair Value, Greater than 12 months	0
Unrealized Loss, Greater than 12 months	0
Fair Value, Total	14,559
Unrealized Loss, Total	(21)
Corporate debt securities
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	271,555	32,996
Unrealized Loss, Less than 12 Months	(950)	(33)
Fair Value, Greater than 12 months	0	0
Unrealized Loss, Greater than 12 months	0	0
Fair Value, Total	271,555	32,996
Unrealized Loss, Total	(950)	$ (33)
Foreign government bonds
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	1,823
Unrealized Loss, Less than 12 Months	(6)
Fair Value, Greater than 12 months	0
Unrealized Loss, Greater than 12 months	0
Fair Value, Total	1,823
Unrealized Loss, Total	(6)
Asset-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	26,718
Unrealized Loss, Less than 12 Months	(160)
Fair Value, Greater than 12 months	0
Unrealized Loss, Greater than 12 months	0
Fair Value, Total	26,718
Unrealized Loss, Total	(160)
Municipal bonds
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Fair Value, Less than 12 months	2,425
Unrealized Loss, Less than 12 Months	(15)
Fair Value, Greater than 12 months	0
Unrealized Loss, Greater than 12 months	0
Fair Value, Total	2,425
Unrealized Loss, Total	$ (15)

Balance Sheet Components - Inve

Balance Sheet Components - Inventory (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Raw materials	$ 10,609	$ 4,991
Finished goods	33,427	41,742
Inventory	$ 44,036	$ 46,733

Balance Sheet Components - Prop

Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Property Plant And Equipment [Line Items]
Total property and equipment	$ 530,578	$ 475,515
Less: accumulated depreciation and amortization	(337,437)	(312,474)
Property and equipment, net	193,141	163,041
Test equipment
Property Plant And Equipment [Line Items]
Total property and equipment	265,005	238,069
Computer equipment and software
Property Plant And Equipment [Line Items]
Total property and equipment	210,503	184,518
Furniture and fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	8,534	8,484
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment	$ 46,536	$ 44,444

Balance Sheet Components - Narr

Balance Sheet Components - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Finite-Lived Intangible Assets [Line Items]
Depreciation and amortization	$ 17.5	$ 14.9	$ 47.2	$ 41.1
Intangible assets amortization expense	$ 4	$ 3.3	$ 12.4	$ 8.7
Technology patents
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)			2 years 2 months 12 days
Developed technology
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)			4 years 2 months 12 days
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)			5 years 10 months 24 days
Trade name
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)			1 year 10 months 24 days

Balance Sheet Components - Inta

Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 109,373	$ 106,580
Accumulated Amortization	(42,381)	(29,932)
Net Carrying Amount	66,992	76,648
Technology patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	19,125	19,125
Accumulated Amortization	(13,232)	(11,722)
Net Carrying Amount	5,893	7,403
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	80,166	77,373
Accumulated Amortization	(26,841)	(17,499)
Net Carrying Amount	53,325	59,874
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,459	6,459
Accumulated Amortization	(1,000)	(308)
Net Carrying Amount	5,459	6,151
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3,623	3,623
Accumulated Amortization	(1,308)	(403)
Net Carrying Amount	$ 2,315	$ 3,220

Balance Sheet Components - Expe

Balance Sheet Components - Expected Amortization Expenses for Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Remainder of 2022	$ 4,061
2023	16,244
2024	15,841
2025	15,036
2026	12,483
Thereafter	3,327
Net Carrying Amount	$ 66,992	$ 76,648

Balance Sheet Components - Good

Balance Sheet Components - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020	Jan. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Goodwill	$ 358,736		$ 358,736		$ 358,736
Impairments to goodwill	$ 0	$ 0	$ 0	$ 0

Balance Sheet Components - Accr

Balance Sheet Components - Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Balance Sheet Components Disclosure [Abstract]
Taxes payable	$ 2,339	$ 4,097
Accrued marketing	10,072	15,638
Accrued travel and entertainment expenses	1,609	866
Acquisition consideration	3,465	9,600
Contract liabilities from contracts with customers	18,802	0
Other accrued liabilities	37,597	31,553
Total accrued expenses and other liabilities	$ 73,884	$ 61,754

Deferred Revenue and Commissi_3

Deferred Revenue and Commissions - Deferred Commissions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Deferred Commissions [Roll Forward]
Beginning balance	$ 195,965,000	$ 144,687,000	$ 187,924,000	$ 139,204,000
Additions	49,822,000	36,234,000	121,802,000	96,530,000
Recognition of deferred commissions	(37,467,000)	(28,832,000)	(101,406,000)	(83,645,000)
Ending balance	$ 208,320,000	152,089,000	$ 208,320,000	152,089,000
Commission expected to be recognized over the next 12 months (percent)	30.00%		30.00%
Impairment of capitalized commissions	$ 0	$ 0	$ 0	$ 0

Deferred Revenue and Commissi_4

Deferred Revenue and Commissions - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Contract Liability
Additions	$ 49,822	$ 36,234	$ 121,802	$ 96,530
Recognition of deferred revenue	(37,467)	(28,832)	(101,406)	(83,645)
Product Revenue and Support Subscription Revenue
Contract Liability
Beginning balance	909,814	724,751	843,697	697,288
Additions	208,542	180,285	611,006	467,454
Recognition of deferred revenue	(168,606)	(142,272)	(504,953)	(401,978)
Ending balance	$ 949,750	$ 762,764	$ 949,750	$ 762,764

Deferred Revenue and Commissi_5

Deferred Revenue and Commissions - Remaining Performance Obligation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue recognized	$ 163.2	$ 121.9	$ 356.2	$ 285
Contracted but not recognized revenue	$ 1,250		$ 1,250
Contracted but not recognized revenue expected to be recognized in the next 12 months (percent)	45.00%		45.00%

Deferred Revenue and Commissi_6

Deferred Revenue and Commissions - Remaining Performance Obligation Period (Details)	Oct. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-02
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized term (in months)	12 months

Debt - Narrative (Details)

Debt - Narrative (Details)	Aug. 24, 2020USD ($)financial_ratio	Apr. 30, 2018USD ($)dayshares$ / shares	Oct. 31, 2021USD ($)$ / shares	Nov. 01, 2020USD ($)	Oct. 31, 2021USD ($)$ / shares	Nov. 01, 2020USD ($)	Sep. 30, 2020USD ($)	Apr. 04, 2018
Debt Instrument [Line Items]
Proceeds from borrowings, net of issuance costs					$ 0	$ 251,892,000
Debt issuance costs, net of amortization		$ 12,900,000
Closing price of stock (in dollars per share) | $ / shares			$ 26.86		$ 26.86
Revolving Credit Facility
Debt Instrument [Line Items]
Term of credit facility	5 years
Senior secured revolving credit facility maximum capacity	$ 300,000,000
Credit facility maturity period prior to stated maturity if out of compliance with liquidity threshold	91 days
Credit facility, daily minimum sum of cash and cash equivalents and aggregate unused commitments to prevent maturity prior to stated maturity	$ 625,000,000
Credit facility, amount borrowed							$ 250,000,000
Interest during the period (percent)			1.59%	1.65%	1.60%
Interest expense			$ 1,000,000	$ 300,000	$ 3,000,000
Number of financial ratios | financial_ratio	2
Consolidated leverage ratio, maximum			4.5
Interest coverage ratio, minimum			3
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment Fee (percent)	0.25%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment Fee (percent)	0.40%
Revolving Credit Facility | Base Rate | Minimum
Debt Instrument [Line Items]
Margin rate (percent)	0.50%
Revolving Credit Facility | Base Rate | Maximum
Debt Instrument [Line Items]
Margin rate (percent)	1.25%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Interest Rate Floor
Debt Instrument [Line Items]
Effective interest rate (percent)	0.00%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Margin rate (percent)	1.50%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Margin rate (percent)	2.25%
Capped Call
Debt Instrument [Line Items]
Payment for purchase of capped calls		64,600,000
Convertible Senior Notes
Debt Instrument [Line Items]
Debt issuance costs, net of amortization		9,800,000	$ 3,148,000	4,671,000	$ 3,148,000	4,671,000
Additional Paid-in Capital
Debt Instrument [Line Items]
Debt issuance costs, net of amortization		$ 3,068,000
Class A
Debt Instrument [Line Items]
Conversion price (in dollars per share) | $ / shares		$ 26.27
Closing price of stock (in dollars per share) | $ / shares			$ 26.86		$ 26.86
Class A | Capped Call
Debt Instrument [Line Items]
Exercise price (in dollars per share) | $ / shares		$ 39.66
Exercise price premium percentage over last reported sales price								100.00%
Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount		$ 575,000,000
Interest rate (as a percent)		0.125%
Proceeds from borrowings, net of issuance costs		$ 562,100,000
Conversion percentage of principal amount plus accrued and unpaid contingent interest		100.00%
Convertible debt, fair value based on the closing trading price per $100 of the Notes			$ 686,500,000		$ 686,500,000
If-converted value			587,800,000		$ 587,800,000
Remaining term of the notes					17 months
Interest expense			$ 7,885,000	$ 7,471,000	$ 23,089,000	$ 21,954,000
Convertible Senior Notes | Class A
Debt Instrument [Line Items]
Number of convertible shares at initial conversion rate (in shares) | shares		21,884,155
Conversion ratio (in shares)		38.0594
Conversion price (in dollars per share) | $ / shares		$ 26.27
Redemption percentage of principal amount of Notes to be redeemed		100.00%
Convertible Senior Notes | Class A | Any Fiscal Quarter Commencing After the Fiscal Quarter Ending on July 31, 2018
Debt Instrument [Line Items]
Threshold trading days | day		20
Threshold consecutive trading days | day		30
Threshold percentage of stock price trigger		130.00%
Convertible Senior Notes | Class A | Five Business Day Period After any Five Consecutive Trading Day Period
Debt Instrument [Line Items]
Threshold consecutive trading days | day		5
Threshold percentage of stock price trigger		98.00%
Threshold business days | day		5
Convertible Senior Notes | Class A | Immediately Preceding the Date on Which We Provide Notice of Redemption
Debt Instrument [Line Items]
Threshold trading days | day		2

Debt - Convertible Debt (Detail

Debt - Convertible Debt (Details) - USD ($) $ in Thousands	1 Months Ended
	Apr. 30, 2018	Oct. 31, 2021	Nov. 01, 2020
Liability:
Less: debt issuance costs, net of amortization	$ (12,900)
Stockholders' equity recorded at issuance:
Less: debt issuance costs	(12,900)
Convertible Senior Notes
Liability:
Principal		$ 575,000	$ 575,000
Less: debt discount, net of amortization		(43,486)	(64,515)
Less: debt issuance costs, net of amortization	(9,800)	(3,148)	(4,671)
Net carrying amount of the Notes		528,366	505,814
Stockholders' equity recorded at issuance:
Less: debt issuance costs	(9,800)	$ (3,148)	$ (4,671)
Additional Paid-in Capital
Liability:
Less: debt issuance costs, net of amortization	(3,068)
Stockholders' equity recorded at issuance:
Allocated value of the conversion feature	136,333
Less: debt issuance costs	(3,068)
Additional paid-in capital	$ 133,265

Debt - Interest Expense (Detail

Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Debt Instrument [Line Items]
Total amortization of debt discount and debt issuance costs			$ 23,011	$ 21,525
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt discount	$ 7,184	$ 6,799	21,029	19,970
Amortization of debt issuance costs	520	491	1,523	1,445
Total amortization of debt discount and debt issuance costs	7,704	7,290	22,552	21,415
Contractual interest expense	181	181	537	539
Total interest expense related to the Notes	$ 7,885	$ 7,471	$ 23,089	$ 21,954
Effective interest rate of the liability component	5.60%	5.60%	5.60%	5.60%

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Oct. 31, 2021	Jan. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit	$ 6.7	$ 6.7

Leases - Lease costs (Details)

Leases - Lease costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Leases [Abstract]
Fixed operating lease cost	$ 9,652	$ 9,494	$ 28,717	$ 27,775
Variable lease cost	2,851	2,455	6,499	7,397
Short-term lease cost (12 months or less)	851	1,502	2,984	4,568
Total lease cost	$ 13,354	$ 13,451	$ 38,200	$ 39,740

Leases - Narrative (Details)

Leases - Narrative (Details)	Oct. 31, 2021
Leases [Abstract]
Operating lease, weighted average remaining lease term	4 years 8 months 12 days
Weighted-average discount rate (as a percent)	5.75%

Leases - Future minimum lease p

Leases - Future minimum lease payments (Details) $ in Thousands	Oct. 31, 2021USD ($)
Leases [Abstract]
The remainder of 2022	$ 13,125
2023	38,213
2024	32,616
2025	27,859
2026	19,322
Thereafter	24,371
Total future lease payments	155,506
Less: imputed interest	(21,414)
Present value of lease liabilities	$ 134,092

Restructuring and Related Activ

Restructuring and Related Activities (Details) $ in Millions	9 Months Ended
	Nov. 01, 2020USD ($)
COVID-19 Pandemic Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 9.8
COVID-19 Pandemic Costs | Restructuring and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	8.9
COVID-19 Pandemic Costs | Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.9
Ceased Use of Certain Leased Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7.5
One-time Involuntary Termination Benefit Costs | Restructuring and Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6.6

Stockholders' Equity - Narrativ

Stockholders' Equity - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
	Oct. 31, 2021USD ($)stock_class$ / sharesshares	Oct. 31, 2021USD ($)stock_class$ / sharesshares	Feb. 28, 2021USD ($)	Jan. 31, 2021$ / sharesshares
Class of Stock [Line Items]
Shares authorized (in shares)	20,000,000	20,000,000		20,000,000
Shares issued (in shares)	0	0		0
Shares outstanding (in shares)	0	0		0
Number of classes of stock | stock_class	2	2
Shares authorized (in shares)	2,250,000,000	2,250,000,000		2,250,000,000
Additional value approved for repurchase | $			$ 200
Stock repurchased and retired (in shares)	2,361,318	6,057,084
Shares repurchased and retired, average purchase price (in dollars per share) | $ / shares	$ 23.79	$ 21.54
Stock repurchased and retired during period, value | $	$ 56.2	$ 130.5
Authorized amount remaining under stock repurchase program | $	$ 69.5	$ 69.5
Class A
Class of Stock [Line Items]
Shares authorized (in shares)	2,000,000,000	2,000,000,000		2,000,000,000
Par value per share (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001		$ 0.0001
Shares issued (in shares)	290,081,069	290,081,069		278,363,000
Shares outstanding (in shares)	290,081,069	290,081,069		278,363,000
Class B
Class of Stock [Line Items]
Shares authorized (in shares)	250,000,000	250,000,000		250,000,000
Par value per share (in dollars per share) | $ / shares	$ 0.0001	$ 0.0001		$ 0.0001

Equity Incentive Plans - Narrat

Equity Incentive Plans - Narrative (Details)	3 Months Ended		9 Months Ended
	Oct. 31, 2021USD ($)periodshares	Nov. 01, 2020USD ($)	Oct. 31, 2021USD ($)periodplanshares	Nov. 01, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans | plan			2
Equity awards expiration period (no later than)			10 years
Total stock-based compensation expense	$ 76,000,000	$ 59,609,000	$ 207,763,000	$ 179,755,000
2015 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan offering period			24 months
Number of purchase periods | period	4		4
Purchase period, term			6 months
Reset charges		23,800,000	$ 0
Total stock-based compensation expense	$ 8,900,000	$ 6,800,000	25,300,000	$ 18,800,000
Unrecognized stock-based compensation expense	$ 21,000,000		$ 21,000,000
Compensation cost (in years)			9 months 18 days
2015 Employee Stock Purchase Plan | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payroll deductions percentage	30.00%		30.00%
Share cap for ESPP at purchase date (in shares) | shares	3,000		3,000
Dollar cap per purchase period			$ 7,500
Calendar year gap for ESPP contribution amount			$ 25,000
Purchase price as percentage of fair market value of common stock			85.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)			4 years

Equity Incentive Plans - Equity

Equity Incentive Plans - Equity Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020	Jan. 31, 2021
Options Outstanding, Number of Shares
Beginning balance (in shares)			18,558,974
Options exercised (in shares)			(3,983,273)
Options forfeited (in shares)			(286,550)
Ending balance (in shares)	14,289,151		14,289,151		18,558,974
Vested and exercisable (in shares)	13,250,654		13,250,654
Options Outstanding, Weighted Average Exercise Price
Beginning balance (in dollars per share)			$ 9.60
Options exercised (in dollars per share)			8.42
Options forfeited/canceled (in dollars per share)			11.24
Ending balance (in dollars per share)	$ 9.90		9.90		$ 9.60
Weighted Average Exercise Price, Vested and exercisable (in dollars per share)	$ 10.32		$ 10.32
Weighted- Average Remaining Contractual Life
Weighted Average Remaining Contractual Life (in years)			3 years 7 months 6 days		4 years 3 months 18 days
Weighted Average Remaining Contractual Life, Vested and exercisable (in years)			3 years 4 months 24 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$ 242,811		$ 242,811		$ 251,503
Aggregate Intrinsic Value, Vested and exercisable	$ 219,225		$ 219,225
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of stock (in dollars per share)	$ 26.86		$ 26.86
Total stock-based compensation expense	$ 76,000	$ 59,609	$ 207,763	$ 179,755
Unrecognized compensation cost, stock options	9,300		9,300
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 1,700	$ 1,600	$ 6,000	$ 5,700
Compensation cost (in years)			1 year 9 months 18 days
Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of stock (in dollars per share)	$ 26.86		$ 26.86

Equity Incentive Plans - Restri

Equity Incentive Plans - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020	Jan. 31, 2021
Unvested restricted stock units
Number of Restricted Stock Units Outstanding
Unvested, Beginning balance (in shares)			30,830,082
Granted (in shares)			14,808,923
Vested (in shares)			(9,875,551)
Forfeited (in shares)			(4,845,679)
Unvested, Ending balance (in shares)	30,917,775		30,917,775
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)			$ 15.77
Granted (in dollars per share)			22.11
Vested (in dollars per share)			16.77
Forfeited (in dollars per share)			16.25
Ending balance (in dollars per share)	$ 18.36		$ 18.36
Aggregate Intrinsic Value	$ 830,451		$ 830,451		$ 712,657
Share-based compensation expense	65,000	$ 50,400	174,900	$ 147,400
Compensation not yet recognized	$ 521,900		$ 521,900
Compensation cost (in years)			2 years 8 months 12 days
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)	100.00%
Number of Restricted Stock Units Outstanding
Granted (in shares)	263,995		1,500,000
PRSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)	0.00%
PRSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, target (as a percent)	150.00%

Equity Incentive Plans - Rest_2

Equity Incentive Plans - Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020	Jan. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 76,000	$ 59,609	$ 207,763	$ 179,755
Unvested restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	400	$ 800	1,600	$ 7,900
Unrecognized stock-based compensation expense	$ 200		$ 200
Compensation cost (in years)			4 months 24 days
Number of Restricted Stock Outstanding
Unvested, Beginning balance (in shares)			557,836
Vested (in shares)			(385,711)
Forfeited/canceled (in shares)			(62,172)
Unvested, Ending balance (in shares)	109,953		109,953
Weighted-Average Grant Date Fair Value
Beginning balance (in dollars per share)			$ 19.06
Vested (in dollars per share)			18.60
Forfeited/canceled (in dollars per share)			20.22
Ending balance (in dollars per share)	$ 20.04		$ 20.04
Aggregate Intrinsic Value	$ 2,953		$ 2,953		$ 12,903

Equity Incentive Plans - Stock-

Equity Incentive Plans - Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 76,000	$ 59,609	$ 207,763	$ 179,755
Cost of revenue—product
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	1,634	1,027	4,547	3,013
Cost of revenue—subscription services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	5,555	3,883	15,098	10,961
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	36,797	29,220	102,343	87,770
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	19,151	14,898	54,317	48,018
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense	$ 12,863	$ 10,581	$ 31,458	$ 29,993

Net Loss per Share Attributab_3

Net Loss per Share Attributable to Common Stockholders - Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Earnings Per Share [Abstract]
Net loss	$ (28,731)	$ (74,222)	$ (158,202)	$ (229,783)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	287,462	269,144	283,918	265,626
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	287,462	269,144	283,918	265,626
Net loss per share attributable to common stockholders, basic (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)
Net loss per share attributable to common stockholders, diluted (in USD per share)	$ (0.10)	$ (0.28)	$ (0.56)	$ (0.87)

Net Loss per Share Attributab_4

Net Loss per Share Attributable to Common Stockholders - Shares Excluded (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	71,312	79,417	73,488	79,892
Stock options to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	15,194	22,687	16,623	23,884
Unvested restricted stock units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	32,937	32,802	33,541	31,743
Unvested restricted stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	176	964	319	1,301
Shares related to convertible senior notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	21,884	21,884	21,884	21,884
Shares issuable pursuant to the ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)	1,121	1,080	1,121	1,080

Other Income (Expense), Net - O

Other Income (Expense), Net - Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Other Income and Expenses [Abstract]
Interest income	$ 2,082	$ 3,728	$ 7,186	$ 14,383
Interest expense	(9,103)	(7,989)	(26,767)	(22,573)
Foreign currency transactions gains (losses)	(1,729)	(699)	(2,927)	(277)
Other income	797	73	2,418	1,767
Total other income (expense), net	$ (7,953)	$ (4,887)	$ (20,090)	$ (6,700)

Segment Information - Narrative

Segment Information - Narrative (Details)	9 Months Ended
	Oct. 31, 2021segmentmanager
Segment Reporting [Abstract]
Number of business activities	1
Number of reportable segments	1
Number of segment managers held accountable for operations or operating results | manager	0

Segment Information - Revenue b

Segment Information - Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Nov. 01, 2020	Oct. 31, 2021	Nov. 01, 2020
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 562,740	$ 410,619	$ 1,472,278	$ 1,181,461
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	408,732	302,091	1,057,015	847,916
Rest of the world
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 154,008	$ 108,528	$ 415,263	$ 333,545

Segment Information - Long-Live

Segment Information - Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Oct. 31, 2021	Jan. 31, 2021
Revenues From External Customers And Long Lived Assets [Line Items]
Total long-lived assets	$ 193,141	$ 163,041
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total long-lived assets	185,282	152,859
Rest of the world
Revenues From External Customers And Long Lived Assets [Line Items]
Total long-lived assets	$ 7,859	$ 10,182