10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2020

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from              to             

Commission File Number 000-26041

F5 NETWORKS, INC.

(Exact name of registrant as specified in its charter)

Washington	91-1714307
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

801 5th Avenue

Seattle, Washington 98104

(Address of principal executive offices and zip code)

(206) 272-5555

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, no par value	FFIV	NASDAQ Global Select Market

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☑    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☑    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large Accelerated Filer	☑	Accelerated Filer	☐
Non-accelerated Filer	☐  (Do not check if a smaller reporting company)	Smaller Reporting Company	☐
		Emerging Growth Company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☑

The number of shares outstanding of the registrant’s common stock as of July 31, 2020 was 61,173,109.

F5 NETWORKS, INC.

QUARTERLY REPORT ON FORM 10-Q

For the Quarter Ended June 30, 2020

Table of Contents

	Page
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements (unaudited)	4
Consolidated Balance Sheets — June 30, 2020 and September 30, 2019	4
Consolidated Income Statements — Three and nine months ended June 30, 2020 and 2019	5
Consolidated Statements of Comprehensive Income — Three and nine months ended June 30, 2020 and 2019	6
Consolidated Statements of Shareholders' Equity — Three and nine months ended June 30, 2020 and 2019	7
Consolidated Statements of Cash Flows — Nine months ended June 30, 2020 and 2019	9
Notes to Consolidated Financial Statements	10
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	26
Item 3. Quantitative and Qualitative Disclosures About Market Risk	32
Item 4. Controls and Procedures	33
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	33
Item 1A. Risk Factors	33
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 4. Mine Safety Disclosures	34
Item 5. Other Information	34
Item 6. Exhibits	34
SIGNATURES	35

PART I. FINANCIAL INFORMATION

Item 1.Financial Statements

F5 NETWORKS, INC.

CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands)

	June 30, 2020		September 30, 2019
ASSETS
Current assets
Cash and cash equivalents	$	714,268	$	599,219
Short-term investments	379,303		373,063
Accounts receivable, net of allowances of $3,343 and $3,259	304,874		322,029
Inventories	28,826		34,401
Other current assets	238,163		182,874
Total current assets	1,665,434		1,511,586
Property and equipment, net	228,293		223,426
Operating lease right-of-use assets	316,761		—
Long-term investments	112,928		358,402
Deferred tax assets	47,919		27,701
Goodwill	1,858,966		1,065,379
Other assets, net	343,056		203,781
Total assets	$	4,573,357	$	3,390,275
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities
Accounts payable	$	54,389	$	62,627
Accrued liabilities	301,038		235,869
Deferred revenue	888,614		807,030
Current portion of long-term debt	19,275		—
Total current liabilities	1,263,316		1,105,526
Deferred tax liabilities	444		313
Deferred revenue, long-term	386,438		391,086
Operating lease liabilities, long-term	345,577		—
Long-term debt	373,866		—
Other long-term liabilities	49,817		131,853
Total long-term liabilities	1,156,142		523,252
Commitments and contingencies (Note 9)
Shareholders' equity
Preferred stock, no par value; 10,000 shares authorized, no shares outstanding	—		—
Common stock, no par value; 200,000 shares authorized, 61,164 and 60,367 shares issued and outstanding	304,526		142,597
Accumulated other comprehensive loss	(18,495)		(19,190)
Retained earnings	1,867,868		1,638,090
Total shareholders' equity	2,153,899		1,761,497
Total liabilities and shareholders' equity	$	4,573,357	$	3,390,275

The accompanying notes are an integral part of these consolidated financial statements.

4

F5 NETWORKS, INC.

CONSOLIDATED INCOME STATEMENTS

(unaudited, in thousands, except per share data)

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Net revenues
Products	$	253,331	$	248,929	$	747,405	$	720,665
Services	329,921		314,465		988,601		931,394
Total	583,252		563,394		1,736,006		1,652,059
Cost of net revenues
Products	57,437		44,336		152,641		130,293
Services	48,603		46,431		143,279		135,366
Total	106,040		90,767		295,920		265,659
Gross profit	477,212		472,627		1,440,086		1,386,400
Operating expenses
Sales and marketing	211,808		195,852		622,799		531,065
Research and development	115,991		116,894		321,024		305,246
General and administrative	61,792		57,141		194,809		146,340
Restructuring charges	—		—		7,800		—
Total	389,591		369,887		1,146,432		982,651
Income from operations	87,621		102,740		293,654		403,749
Other income, net	141		4,722		5,220		19,251
Income before income taxes	87,762		107,462		298,874		423,000
Provision for income taxes	17,890		21,557		69,096		90,103
Net income	$	69,872	$	85,905	$	229,778	$	332,897
Net income per share — basic	$	1.15	$	1.43	$	3.78	$	5.55
Weighted average shares — basic	60,978		59,981		60,831		59,963
Net income per share — diluted	$	1.14	$	1.43	$	3.76	$	5.51
Weighted average shares — diluted	61,415		60,196		61,182		60,372

The accompanying notes are an integral part of these consolidated financial statements.

5

F5 NETWORKS, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(unaudited, in thousands)

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Net income	$	69,872	$	85,905	$	229,778	$	332,897
Other comprehensive income:
Foreign currency translation adjustment	184		118		(768)		61
Available-for-sale securities:
Unrealized gains on securities, net of taxes of $490 and $197 for the three months ended June 30, 2020 and 2019, respectively, and $146 and $940 for the nine months ended June 30, 2020 and 2019, respectively	4,061		918		1,230		3,811
Reclassification adjustment for realized losses included in net income, net of taxes of $(47) and $(35) for the three months ended June 30, 2020 and 2019, respectively, and $(65) and $(35) for the nine months ended June 30, 2020 and 2019, respectively	163		112		233		113
Net change in unrealized gains on available-for-sale securities, net of tax	4,224		1,030		1,463		3,924
Total other comprehensive income	4,408		1,148		695		3,985
Comprehensive income	$	74,280	$	87,053	$	230,473	$	336,882

The accompanying notes are an integral part of these consolidated financial statements.

6

F5 NETWORKS, INC.

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(unaudited, in thousands)

	Common Stock			Accumulated Other Comprehensive Loss		Retained Earnings		Total Shareholders’ Equity
	Shares	Amount
	(In thousands)
	Three months ended June 30, 2019
Balances, March 31, 2019	59,695	$	29,401	$	(19,341)	$	1,457,348	$	1,467,408
Exercise of employee stock options	1	16		—		—		16
Issuance of stock under employee stock purchase plan	199	26,539		—		—		26,539
Issuance of restricted stock	234	—		—		—		—
Stock-based compensation	—	42,766		—		—		42,766
Net income	—	—		—		85,905		85,905
Other comprehensive income	—	—		1,148		—		1,148
Balances, June 30, 2019	60,129	$	98,722	$	(18,193)	$	1,543,253	$	1,623,782
	Three months ended June 30, 2020
Balances, March 31, 2020	60,629	$	223,101	$	(22,903)	$	1,797,996	$	1,998,194
Exercise of employee stock options	41	987		—		—		987
Issuance of stock under employee stock purchase plan	250	29,570		—		—		29,570
Issuance of restricted stock	244	—		—		—		—
Stock-based compensation	—	50,868		—		—		50,868
Net income	—	—		—		69,872		69,872
Other comprehensive income	—	—		4,408		—		4,408
Balances, June 30, 2020	61,164	$	304,526	$	(18,495)	$	1,867,868	$	2,153,899

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	Nine months ended June 30, 2019
Balances, September 30, 2018	60,215	$	20,427	$	(22,178)	$	1,287,243	$	1,285,492
Cumulative effect adjustment from adoption of ASC 606	—	—		—		36,048		36,048
Exercise of employee stock options	1	16		—		—		16
Issuance of stock under employee stock purchase plan	334	45,439		—		—		45,439
Issuance of restricted stock	765	—		—		—		—
Repurchase of common stock	(1,186)	(88,110)		—		(112,935)		(201,045)
Stock-based compensation	—	120,950		—		—		120,950
Net income	—	—		—		332,897		332,897
Other comprehensive income	—	—		3,985		—		3,985
Balances, June 30, 2019	60,129	$	98,722	$	(18,193)	$	1,543,253	$	1,623,782
	Nine months ended June 30, 2020
Balances, September 30, 2019	60,367	$	142,597	$	(19,190)	$	1,638,090	$	1,761,497
Exercise of employee stock options	72	1,760		—		—		1,760
Issuance of stock under employee stock purchase plan	419	50,239		—		—		50,239
Issuance of restricted stock	748	—		—		—		—
Repurchase of common stock	(442)	(50,009)		—		—		(50,009)
Stock-based compensation	—	159,939		—		—		159,939
Net income	—	—		—		229,778		229,778
Other comprehensive income	—	—		695		—		695
Balances, June 30, 2020	61,164	$	304,526	$	(18,495)	$	1,867,868	$	2,153,899

The accompanying notes are an integral part of these consolidated financial statements.

8

F5 NETWORKS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Nine months ended June 30,
	2020		2019
Operating activities
Net income	$	229,778	$	332,897
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	149,315		119,182
Depreciation and amortization	69,337		46,645
Non-cash operating lease costs	29,731		—
Other	168		671
Deferred income taxes	4,357		10,171
Changes in operating assets and liabilities (excluding effects of the acquisition of businesses):
Accounts receivable	38,024		(16,249)
Inventories	5,575		(5,441)
Other current assets	(33,572)		(54,381)
Other assets	(5,659)		(8,785)
Accounts payable and accrued liabilities	(1,538)		37,932
Deferred revenue	37,934		79,113
Lease liabilities	(38,456)		—
Net cash provided by operating activities	484,994		541,755
Investing activities
Purchases of investments	(390,696)		(210,109)
Maturities of investments	322,271		507,804
Sales of investments	309,040		276,278
Acquisition of businesses, net of cash acquired	(955,574)		(611,550)
Purchases of property and equipment	(47,857)		(83,008)
Net cash used in investing activities	(762,816)		(120,585)
Financing activities
Proceeds from the exercise of stock options and purchases of stock under employee stock purchase plan	51,999		45,455
Repurchase of common stock	(50,009)		(201,045)
Proceeds from term debt agreement	400,000		—
Payments on term debt agreement	(5,000)		—
Payments for debt issuance costs	(3,040)		—
Net cash provided by (used in) financing activities	393,950		(155,590)
Net increase in cash, cash equivalents and restricted cash	116,128		265,580
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(856)		(111)
Cash, cash equivalents and restricted cash, beginning of period	602,254		425,894
Cash, cash equivalents and restricted cash, end of period	$	717,526	$	691,363
Supplemental disclosures of cash flow information
Cash paid for amounts included in the measurement of operating lease liabilities	$	45,399	$	—
Cash paid for interest on long-term debt	$	4,330	$	—
Supplemental disclosures of non-cash activities
Right-of-use assets obtained in exchange for lease obligations	$	399,203	$	—
Capitalized leasehold improvements paid directly by landlord	$	—	$	34,487

The accompanying notes are an integral part of these consolidated financial statements.

9

F5 NETWORKS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (unaudited)

1. Summary of Significant Accounting Policies

Description of Business

F5 Networks, Inc. (the "Company") is a leading provider of multi-cloud application services which enable its customers to develop, deploy, operate, secure, and govern applications in any architecture, from on-premises to the public cloud. The Company's cloud, software, and hardware solutions enable its customers to deliver digital experiences to their customers faster, reliably, and at scale. The Company's enterprise-grade application services are available as cloud-based, software-as-a-service, and software-only solutions optimized for multi-cloud environments, with modules that can run independently, or as part of an integrated solution on its high-performance appliances. In connection with its solutions, the Company offers a broad range of professional services, including consulting, training, installation, maintenance, and other technical support services. On January 24, 2020, the Company completed the acquisition of Shape Security, Inc. ("Shape"), a leader in online fraud and abuse prevention, adding protection from automated attacks, botnets, and targeted fraud to F5's world-class portfolio of application services.

Basis of Presentation

The year-end consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, necessary for their fair statement in conformity with accounting principles generally accepted in the United States of America. Certain information and footnote disclosures normally included in annual financial statements have been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC"). The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2019.

Certain prior year amounts have been reclassified to conform to the current year presentation in the Consolidated Statements of Cash Flows. The reclassified amounts are considered immaterial and there was no change to total cash from operating, investing or financing activities as a result.

There have been no material changes to the Company's significant accounting policies as of and for the three and nine months ended June 30, 2020, except for the accounting policy for leases that was updated as a result of adopting Accounting Standards Update 2016-02, Leases (Topic 842) (ASU 2016-02) and related standards. For more information, refer to the "Recently Adopted Accounting Standards" section of Note 1 and Note 8 - Leases.

In December 2019, a novel strain of coronavirus (“COVID-19“) was first identified, and in March 2020, the World Health Organization categorized COVID-19 as a pandemic. The Company assessed the impact that COVID-19 had on its results of operations, including, but not limited to an assessment of its allowance for doubtful accounts, the carrying value of short-term and long-term investments, the carrying value of goodwill and other long-lived assets, and the impact to revenue recognition and cost of revenues. The Company is actively monitoring the impact to the results of its business operations, and may make decisions required by federal, state or local authorities, or that are determined to be in the best interests of its employees, customers, partners, suppliers and stockholders. As of the filing date, the extent to which the COVID-19 pandemic may impact the Company’s financial condition or results of operations remains uncertain.

Recently Adopted Accounting Standards

In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02), which requires lessees to recognize on the balance sheet a right-of-use asset, representing its right to use the underlying asset for the lease term, and a corresponding lease liability for all leases with terms greater than twelve months. The Company's leases consist primarily of operating leases for its offices and lab spaces. The Company does not have finance leases. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing and uncertainty of cash flows arising from leases. The Company adopted this standard on October 1, 2019 on a modified retrospective basis by applying the new standard to its lease portfolio as of October 1, 2019, while continuing to apply legacy guidance in the comparative periods. The adoption of this standard had no impact on the consolidated income statements and consolidated statements of cash flows. Refer to Note 8 - Leases for further discussion.

Upon adoption of the standard, the Company elected the package of three expedients for existing and expired contracts to not reassess: the existence of additional leases, lease classification, or the treatment of initial direct costs. The Company also

10

applies the short-term lease exemption for leases with an original expected term of 12 months or less and expenses such leases month-to-month and does not record a right-of-use asset or lease liability. Short-term lease activity under the exception is not significant. Additionally, the Company does not separate lease and non-lease components in the allocation of minimum lease payments for its office space and equipment leases, as such separation is not significant.

The Company includes in minimum lease payments, fixed and variable payments based on a rate or index, but excludes variable payments based on satisfying future benchmarks or actual future costs incurred; such amounts are expensed as incurred. To calculate the net present value, the Company applied an incremental borrowing rate. This incremental borrowing rate is determined using a portfolio approach based on the rate of interest the Company would pay to borrow an amount equal to the lease payments on a collateralized basis over a similar term. Renewal options to extend lease terms are excluded from the minimum lease term at lease commencement.

Recently Issued Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), which replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) (ASU 2018-15), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software, and hosting arrangements that include an internal use software license. The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

2. Revenue from Contracts with Customers

Capitalized Contract Acquisition Costs

The table below shows significant movements in capitalized contract acquisition costs (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	59,446
Additional capitalized contract acquisition costs deferred	31,759
Amortization of capitalized contract acquisition costs	(24,768)
Balances, June 30, 2020	$	66,437

Amortization of capitalized contract acquisition costs was $7.8 million and $6.9 million for the three months ended June 30, 2020 and 2019, respectively, and $24.8 million and $21.3 million for the nine months ended June 30, 2020 and 2019, respectively, and is recorded in Sales and Marketing expense in the accompanying consolidated income statements. There was no impairment of any capitalized contract acquisition costs during any period presented.

Contract Balances

Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to the Company's contracts with customers. The Company records assets for amounts related to performance obligations that are satisfied but not yet billed and/or collected, in addition to contracts that have started, but not yet been fully billed. These assets are recorded as contract assets rather than receivables when receipt of the consideration is conditional on something other than the passage of time. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations. These liabilities are classified as current and non-current deferred revenue.

11

The table below shows significant movements in contract assets (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	132,492
Revenue recognized during period but not yet billed	22,213
Contract asset additions	80,243
Contract assets acquired through the purchase of Shape	6,045
Contract assets reclassified to accounts receivable	(62,523)
Balances, June 30, 2020	$	178,470

As of June 30, 2020, contract assets that are expected to be reclassified to receivables within the next 12 months are included in other current assets, with those expected to be transferred to receivables in more than 12 months included in other assets. There were no impairments of contract assets during the nine months ended June 30, 2020 and 2019.

The table below shows significant movements in the deferred revenue balances (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	1,198,116
Amounts billed but not recognized as revenues	740,050
Amounts acquired through the purchase of Shape	39,000
Revenues recognized related to the opening balance of deferred revenue	(702,114)
Balances, June 30, 2020	$	1,275,052

The Company's contract assets and liabilities are reported in a net position on a contract by contract basis at the end of each reporting period.

Remaining Performance Obligations

Remaining performance obligations represent the amount of the transaction price under contracts with customers that are attributable to performance obligations that are unsatisfied or partially satisfied at the reporting date. As of June 30, 2020, the total non-cancelable remaining performance obligations under the Company's contracts with customers was approximately $1.3 billion and the Company expects to recognize revenues on approximately 69.7% of these remaining performance obligations over the next 12 months, 18.9% in year two, and the remaining balance thereafter.

See Note 12, Segment Information, for disaggregated revenue by significant customer and geographic region.

3. Fair Value Measurements

In accordance with the authoritative guidance on fair value measurements and disclosure under GAAP, the Company determines fair value using a fair value hierarchy that distinguishes between market participant assumptions developed based on market data obtained from sources independent of the reporting entity, and the reporting entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances and expands disclosure about fair value measurements.

Fair value is the price that would be received to sell 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 at the measurement date, essentially the exit price.

The levels of fair value hierarchy are:

Level 1: Quoted prices in active markets for identical assets and liabilities at the measurement date that the Company has the ability to access.

Level 2: Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Unobservable inputs for which there is little or no market data available. These inputs reflect management's assumptions of what market participants would use in pricing the asset or liability.

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Level 1 investments are valued based on quoted market prices in active markets and include the Company's cash equivalent investments. Level 2 investments, which include investments that are valued based on quoted prices in markets that are not active, broker or dealer quotations, actual trade data, benchmark yields or alternative pricing sources with reasonable levels of price transparency, include the Company's certificates of deposit, corporate bonds and notes, municipal bonds and notes, U.S. government securities, U.S. government agency securities and international government securities. Fair values for the Company's level 2 investments are based on similar assets without applying significant judgments. In addition, all of the Company's level 2 investments have a sufficient level of trading volume to demonstrate that the fair values used are appropriate for these investments.

A financial instrument's level within the fair value hierarchy is based upon the lowest level of any input that is significant to the fair value measurement. However, the determination of what constitutes "observable" requires significant judgment by the Company. The Company considers observable data to be market data which is readily available, regularly distributed or updated, reliable and verifiable, not proprietary, and provided by independent sources that are actively involved in the relevant market.

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at June 30, 2020, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at June 30, 2020
Cash equivalents	$	60,488	$	8,258	$	—	$	68,746
Short-term investments
Available-for-sale securities — corporate bonds and notes	—		203,851		—		203,851
Available-for-sale securities — municipal bonds and notes	—		7,040		—		7,040
Available-for-sale securities — U.S. government securities	—		161,417		—		161,417
Available-for-sale securities — U.S. government agency securities	—		6,995		—		6,995
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		97,677		—		97,677
Available-for-sale securities — U.S. government securities	—		3,982		—		3,982
Available-for-sale securities — U.S. government agency securities	—		11,269		—		11,269
Total	$	60,488	$	500,489	$	—	$	560,977

13

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2019, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at September 30, 2019
Cash equivalents	$	140,238	$	153,404	$	—	$	293,642
Short-term investments
Available-for-sale securities — certificates of deposits	—		249		—		249
Available-for-sale securities — corporate bonds and notes	—		259,547		—		259,547
Available-for-sale securities — municipal bonds and notes	—		12,129		—		12,129
Available-for-sale securities — U.S. government securities	—		78,992		—		78,992
Available-for-sale securities — U.S. government agency securities	—		22,146		—		22,146
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		298,916		—		298,916
Available-for-sale securities — municipal bonds and notes	—		2,524		—		2,524
Available-for-sale securities — U.S. government securities	—		5,515		—		5,515
Available-for-sale securities — U.S. government agency securities	—		51,447		—		51,447
Total	$	140,238	$	884,869	$	—	$	1,025,107

The Company uses the fair value hierarchy for financial assets and liabilities. The fair value of the Company's borrowings under its Term Loan Facility approximate the carrying value based on the borrowing rates currently available to the Company for loans with similar terms using Level 2 inputs. The carrying amounts of other current financial assets and other current financial liabilities approximate fair value due to their short-term nature.

The Company's non-financial assets and liabilities, which include goodwill, intangible assets, and long-lived assets, are not required to be carried at fair value on a recurring basis. These non-financial assets and liabilities are measured at fair value on a non-recurring basis when there is an indicator of impairment, and they are recorded at fair value only when impairment is recognized. The Company reviews goodwill and intangible assets for impairment annually, during the second quarter of each fiscal year, or as circumstances indicate the possibility of impairment. The Company monitors the carrying value of long-lived assets for impairment whenever events or changes in circumstances indicate its carrying amount may not be recoverable. Included in the Company’s impairment considerations for non-financial assets and liabilities in the current quarter were the potential impacts of the COVID-19 pandemic. During the three and nine months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to goodwill, intangible assets, or long-lived assets.

4. Short-Term and Long-Term Investments

Short-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	202,968	$	900	$	(17)	$	203,851
Municipal bonds and notes	7,018		22		—		7,040
U.S. government securities	161,414		38		(35)		161,417
U.S. government agency securities	6,987		10		(2)		6,995
	$	378,387	$	970	$	(54)	$	379,303

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September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposits	$	249	$	—	$	—	$	249
Corporate bonds and notes	259,242		402		(97)		259,547
Municipal bonds and notes	12,128		6		(5)		12,129
U.S. government securities	78,988		18		(14)		78,992
U.S. government agency securities	22,138		9		(1)		22,146
	$	372,745	$	435	$	(117)	$	373,063

Long-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	96,645	$	1,112	$	(80)	$	97,677
U.S. government securities	3,984		—		(2)		3,982
U.S. government agency securities	11,250		23		(4)		11,269
	$	111,879	$	1,135	$	(86)	$	112,928

September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	298,888	$	469	$	(441)	$	298,916
Municipal bonds and notes	2,528		2		(6)		2,524
U.S. government securities	5,515		3		(3)		5,515
U.S. government agency securities	51,463		5		(21)		51,447
	$	358,394	$	479	$	(471)	$	358,402

Interest income from investments was $2.2 million and $5.8 million for the three months ended June 30, 2020 and 2019, respectively, and $11.1 million and $20.2 million for the nine months ended June 30, 2020 and 2019, respectively. Interest income is included in other income, net on the Company's consolidated income statements.

The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of June 30, 2020 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
June 30, 2020	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	71,355	$	(92)	$	5,005	$	(5)	$	76,360	$	(97)
U.S. government securities	152,646		(37)		—		—		152,646		(37)
U.S. government agency securities	9,789		(6)		—		—		9,789		(6)
Total	$	233,790	$	(135)	$	5,005	$	(5)	$	238,795	$	(140)

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The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of September 30, 2019 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
September 30, 2019	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	237,747	$	(434)	$	109,613	$	(104)	$	347,360	$	(538)
Municipal bonds and notes	864		—		7,800		(11)		8,664		(11)
U.S. government securities	27,095		(12)		9,991		(5)		37,086		(17)
U.S. government agency securities	30,946		(22)		—		—		30,946		(22)
Total	$	296,652	$	(468)	$	127,404	$	(120)	$	424,056	$	(588)

The Company invests in securities that are rated investment grade. The Company reviews the individual securities in its portfolio to determine whether a decline in a security's fair value below the amortized cost basis is other-than-temporary. Gross unrealized losses were not deemed material as of June 30, 2020 and were primarily caused by global market disruptions resulting from the COVID-19 pandemic rather than credit risks associated with the respective issuers of the debt securities. The Company determined that as of June 30, 2020, there were no investments in its portfolio that were other-than-temporarily impaired as a result of the COVID-19 pandemic or other market conditions.

5. Business Combinations

Fiscal Year 2020 Acquisition of Shape Security, Inc.

On December 19, 2019, the Company entered into a Merger Agreement (the "Merger Agreement") with Shape Security, Inc. ("Shape"), a provider of fraud and abuse prevention solutions. The transaction closed on January 24, 2020 with Shape becoming a wholly-owned subsidiary of F5.

Pursuant to the Merger Agreement, at the effective time of the acquisition, the capital stock of Shape and the vested outstanding and unexercised stock options in Shape were cancelled and converted to the right to receive approximately $1.0 billion in cash, subject to certain adjustments and conditions set forth in the Merger Agreement, and the unvested stock options and restricted stock units in Shape held by continuing employees of Shape were assumed by F5, on the terms and conditions set forth in the Merger Agreement. Included in cash consideration was $23.2 million of transaction costs paid by F5 on behalf of Shape. In addition, the Company incurred $15.3 million of transaction costs associated with the acquisition which was included in General and Administrative expenses in the first and second fiscal quarters of 2020.

Shape is a leader in online fraud and abuse prevention, adding protection from automated attacks, botnets, and targeted fraud to F5's world-class portfolio of application services. As a result of the acquisition, the Company acquired all the assets and assumed all the liabilities of Shape. The goodwill related to the Shape acquisition is comprised primarily of expected synergies from combining operations and the acquired intangible assets that do not qualify for separate recognition. Goodwill related to the Shape acquisition is not expected to be deductible for tax purposes. The results of operations of Shape have been included in the Company's consolidated financial statements from the date of acquisition.

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The preliminary purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash, cash equivalents, and restricted cash	$	53,934
Fair value of tangible assets:
Accounts receivable	21,077
Deferred tax assets	24,619
Operating lease right-of-use assets	29,644
Other tangible assets	22,571
Identifiable intangible assets:
Developed technologies	120,000		7 years
Customer relationships	21,000		4 years
Trade name	9,500		5 years
Goodwill	799,611
Total assets acquired	$	1,101,956
Liabilities assumed
Deferred revenue	$	(39,000)
Operating lease liabilities	(30,773)
Other assumed liabilities	(18,571)
Total liabilities assumed	$	(88,344)
Net assets acquired	$	1,013,612

The initial allocation of the purchase price was based on preliminary valuations and assumptions and is subject to change within the measurement period. The Company expects to finalize the allocation of the purchase price as soon as practicable and no later than one year from the acquisition date.

The developed technology intangible asset will be amortized on a straight-line basis over its estimated useful life of seven years and included in cost of net product revenues. The trade names and customer relationships intangible assets will be amortized on a straight-line basis over their estimated useful lives of five years and four years, respectively, and included in sales and marketing expenses. The weighted average life of the amortizable intangible assets recognized from the Shape acquisition was 6.5 years as of January 24, 2020, the date the transaction closed. The estimated useful lives for the acquired intangible assets were based on the expected future cash flows associated with the respective asset.

Since the Shape acquisition was completed on January 24, 2020, the F5 and Shape teams have been executing a plan to integrate ongoing operations. The pro forma financial information, as well as the revenue and earnings generated by Shape, were not considered material to the Company's operations.

Fiscal Year 2019 Acquisition of Nginx, Inc.

On March 9, 2019, the Company entered into a Merger Agreement (the "Merger Agreement") with Nginx, Inc. ("NGINX"), a provider of open source web server software and application delivery solutions. The transaction closed on May 8, 2019 with NGINX becoming a wholly-owned subsidiary of F5.

Pursuant to the Merger Agreement, at the effective time of the acquisition, the capital stock of NGINX and the vested outstanding and unexercised stock options in NGINX were cancelled and converted to the right to receive approximately $643.2 million in cash, subject to certain adjustments and conditions set forth in the Merger Agreement, and the unvested stock options and restricted stock units in NGINX held by continuing employees of NGINX were assumed by F5, on the terms and conditions set forth in the Merger Agreement. Included in cash consideration was $19.0 million of transaction costs paid by F5 on behalf of NGINX. In addition, the Company incurred $1.0 million of transaction costs associated with the acquisition which was included in General and Administrative expenses for fiscal 2019.

NGINX is an open source leader in application delivery. The combined company will enable multi-cloud application services across all environments, providing the ease-of-use and flexibility developers require while also delivering the scale, security, reliability and enterprise readiness network operations teams demand. As a result of the acquisition, the Company

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acquired all the assets and assumed all the liabilities of NGINX. The goodwill related to the NGINX acquisition is comprised primarily of expected synergies from combining operations and the acquired intangible assets that do not qualify for separate recognition. The results of operations of NGINX have been included in the Company's consolidated financial statements from the date of acquisition.

The purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash and cash equivalents	$	29,911
Fair value of tangible assets:
Other tangible assets	23,699
Identifiable intangible assets:
Developed technologies	62,500		7 years
Customer relationships	12,000		15 years
Trade name	14,500		7 years
Non-competition agreements	300		2 years
Goodwill	503,414
Total assets acquired	$	646,324
Liabilities assumed
Other assumed liabilities	$	(9,116)
Total liabilities assumed	$	(9,116)
Net assets acquired	$	637,208

The measurement period for the NGINX acquisition lapsed during the third quarter of fiscal 2020. The Company reduced the carrying amount of goodwill by $6.0 million to reflect an adjustment to consideration exchanged for the purchase of NGINX within the post-close measurement period. No other financial statement amounts were affected by this adjustment. The adjustment was not material to the current period or any of the previous period financial statements.

The developed technology intangible asset will be amortized on a straight-line basis over its estimated useful life of seven years and included in cost of net product revenues. The trade names and customer relationships intangible assets will be amortized on a straight-line basis over their estimated useful lives of seven years and fifteen years, respectively, and included in sales and marketing expenses. The weighted average life of the amortizable intangible assets recognized from the NGINX acquisition was 8.1 years as of May 8, 2019, the date the transaction closed. The estimated useful lives for the acquired intangible assets were based on the expected future cash flows associated with the respective asset. Tax deductible goodwill based on the Company's preliminary calculation is $490.3 million.

Since the NGINX acquisition was completed on May 8, 2019, the F5 and NGINX teams have been executing a plan to integrate ongoing operations.

6. Balance Sheet Details

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of the Company's cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company's consolidated statements of cash flows for the periods presented (in thousands):

	June 30, 2020		September 30, 2019
Cash and cash equivalents	$	714,268	$	599,219
Restricted cash included in other assets, net	3,258		3,035
Total cash, cash equivalents and restricted cash	$	717,526	$	602,254

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Inventories

Inventories consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Finished goods	$	18,250	$	22,441
Raw materials	10,576		11,960
	$	28,826	$	34,401

Other Current Assets

Other current assets consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Contract assets	$	123,947	$	79,407
Prepaid expenses	50,914		49,051
Capitalized contract acquisition costs	28,111		28,228
Other	35,191		26,188
	$	238,163	$	182,874

Other Assets

Other assets, net consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Intangible assets	$	236,371	$	108,903
Contract assets	54,523		53,085
Capitalized contract acquisition costs	38,325		31,218
Other	13,837		10,575
	$	343,056	$	203,781

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Payroll and benefits	$	139,167	$	138,453
Operating lease liabilities, current	46,490		—
Income and other tax accruals	35,855		31,801
Other	79,526		65,615
	$	301,038	$	235,869

Other Long-term Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Income taxes payable	$	39,784	$	42,324
Deferred rent	—		66,103
Other	10,033		23,426
	$	49,817	$	131,853

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7. Debt Facilities

Term Credit Agreement

In connection with the acquisition of Shape, on January 24, 2020, the Company entered into a Term Credit Agreement ("Term Credit Agreement") with certain institutional lenders that provides for a senior unsecured term loan facility in an aggregate principal amount of $400.0 million (the "Term Loan Facility"). The proceeds from the Term Loan Facility were primarily used to finance the acquisition of Shape and related expenses. In connection with the Term Loan Facility, the Company incurred $2.2 million in debt issuance costs, which are recorded as a reduction to the carrying value of the principal amount of the debt.

Borrowings under the Term Loan Facility bear interest at a rate equal to, at the Company's option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Term Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. Interest on the outstanding principal of borrowings is currently due quarterly in arrears. As of June 30, 2020, the margin for LIBOR-based loans was 1.125% and the margin for alternate base rate loans was 0.125%.

The Term Loan Facility matures on January 24, 2023 with quarterly installments (commencing with the first full fiscal quarter ended after January 24, 2020) equal to 1.25% of the original principal amount of the Term Loan Facility. The remaining outstanding principal of borrowings under the Term Loan Facility is due upon maturity on January 24, 2023. Borrowings under the Term Loan Facility may be voluntarily prepaid, in whole or in part, without penalty or premium. Borrowings repaid or prepaid under the Term Loan Facility may not be reborrowed.

 Among certain affirmative and negative covenants provided in the Term Credit Agreement, there is a financial covenant that requires the Company to maintain a leverage ratio, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. This covenant may result in a higher interest rate on its outstanding principal borrowings on the Term Loan Facility in future periods, depending on the Company's performance. As of June 30, 2020, the Company was in compliance with all covenants.

As of June 30, 2020, $395.0 million of principal amount under the Term Loan Facility was outstanding, excluding unamortized debt issuance costs of $1.9 million. The weighted average interest rate on the principal amount under the Term Loan Facility outstanding balance was 2.452% for the period ending June 30, 2020. The following table presents the scheduled principal maturities as of June 30, 2020 (in thousands):

Fiscal Years Ending September 30:	Amount
2020 (remainder)	$	—
2021	20,000
2022	20,000
2023	355,000
Total	$	395,000

Revolving Credit Agreement

On January 31, 2020, the Company entered into a Revolving Credit Agreement (the "Revolving Credit Agreement") that provides for a senior unsecured revolving credit facility in an aggregate principal amount of $350.0 million (the "Revolving Credit Facility"). The Company has the option to increase commitments under the Revolving Credit Facility from time to time, subject to certain conditions, by up to $150.0 million. Borrowings under the Revolving Credit Facility bear interest at a rate equal to, at the Company's option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Revolving Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. The Revolving Credit Agreement also requires payment of a commitment fee calculated at a rate per annum of 0.125% to 0.300% depending on the Company's leverage ratio on the undrawn portion of the Revolving Credit Facility. Amounts incurred during the three months ended June 30, 2020 were not material.

The Revolving Credit Facility matures on January 31, 2025, upon which any remaining outstanding principal of borrowings under the Revolving Credit Facility is due. The Company has the option to request up to two extensions of the maturity date in each case for an additional period of one year. Among certain affirmative and negative covenants provided in the Revolving Credit Agreement, there is a financial covenant that requires the Company to maintain a leverage ratio, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. As of June 30, 2020, the Company was in compliance with all covenants. As of June 30, 2020, there were no outstanding borrowings under the Revolving Credit Facility, and the Company had available borrowing capacity of $350.0 million.

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8. Leases

During the first quarter of fiscal 2020, the Company adopted ASU 2016-02, Leases (Topic 842) (the "Leasing Standard") using the transition method provided in ASU 2018-11, Leases (Topic 842): Targeted Improvements. The impact of adopting the Leasing Standard resulted in the recognition of right-of-use assets and lease liabilities of $304.8 million and $386.4 million, respectively, on October 1, 2019, the date of adoption.

The majority of the Company's operating lease payments relate to its corporate headquarters in Seattle, Washington, which includes approximately 515,000 square feet of office space. The lease commenced in April 2019 and expires in 2033 with an option for renewal. The Company has concluded that the renewal option is not yet likely to be exercised. The Company also leases additional office and lab space for product development and sales and support personnel in the United States and internationally. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.

The components of the Company's operating lease expenses for the three and nine months ended June 30, 2020 were as follows (in thousands):

	Three months ended June 30, 2020		Nine months ended June 30, 2020
Operating lease expense	$	13,431	$	37,724
Short-term lease expense	878		2,505
Variable lease expense	6,062		16,163
Total lease expense	$	20,371	$	56,392

Variable lease expense primarily consists of common area maintenance and parking expenses. The Company executed two sublease contracts that commenced during the first quarter of fiscal year 2020. Lease income payments commenced in the second fiscal quarter. The Company has three additional subleases through the Q2 2020 acquisition of Shape Security.

Supplemental balance sheet information related to the Company's operating leases was as follows (in thousands, except lease term and discount rate):

	June 30, 2020
Operating lease right-of-use assets, net	$	316,761
Operating lease liabilities, current1	46,490
Operating lease liabilities, long-term	345,577
Total operating lease liabilities	$	392,067
Weighted average remaining lease term (in years)	10.4
Weighted average discount rate	2.61		%

(1)Current portion of operating lease liabilities is included in accrued liabilities on the Company's consolidated balance sheet.

Maturities of lease liabilities as of June 30, 2020 were as follows (in thousands):

Fiscal Years Ending September 30:	Operating Lease Payments
2020 (remainder)	$	11,613
2021	59,308
2022	56,111
2023	43,060
2024	38,340
2025	32,132
Thereafter	215,954
Total lease payments	456,518
Less: imputed interest	(64,451)
Total lease liabilities	$	392,067

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Operating lease liabilities above do not include sublease income. As of June 30, 2020, the Company expects to receive sublease income of approximately $11.4 million, which consists of $1.1 million to be received for the remainder of fiscal 2020 and $10.3 million to be received over the three fiscal years thereafter.

As of June 30, 2020, the Company had no significant operating leases that were executed but not yet commenced.

ASC 840 - Leases

As a result of adopting the Leasing Standard, reporting periods beginning in the first quarter of fiscal 2020 are presented under the new standard while prior period amounts are not adjusted and continue to be reported in accordance with ASC 840 - Leases.

Prior to the adoption of the Leasing Standard, future minimum operating lease payments, net of sublease income, were as follows as of September 30, 2019 (in thousands):

Fiscal Year	Gross Lease Payments		Sublease Income		Net Lease Payments
2020	$	54,046	$	683	$	53,363
2021	50,712		1,051		49,661
2022	47,550		1,082		46,468
2023	36,514		368		36,146
2024	33,971		—		33,971
Thereafter	242,826		—		242,826
	$	465,619	$	3,184	$	462,435

9. Commitments and Contingencies

Guarantees and Product Warranties

In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, resellers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company has entered into indemnification agreements with its officers and directors and certain other employees, and the Company's bylaws contain similar indemnification obligations to the Company's agents. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement.

The Company generally offers warranties of one year for hardware for those customers without service contracts, with the option of purchasing additional warranty coverage in yearly increments. The Company accrues for warranty costs as part of its cost of sales based on associated material product costs and technical support labor costs. Accrued warranty costs as of June 30, 2020 and September 30, 2019 were not material.

Commitments

As of June 30, 2020, the Company's principal commitments consisted of borrowings under the Term Loan Facility and obligations outstanding under operating leases. Refer to Note 7 for the scheduled principal maturities of the Term Loan Facility as of June 30, 2020.

The Company leases its facilities under operating leases that expire at various dates through 2033. There have been no material changes in the Company's lease obligations compared to those discussed in Note 11 to its annual consolidated financial statements.

The Company currently has arrangements with contract manufacturers and other suppliers for the manufacturing of its products. The arrangement with the primary contract manufacturer allows them to procure component inventory on the Company's behalf based on a rolling production forecast provided by the Company. The Company is obligated to the purchase of component inventory that the contract manufacturer procures in accordance with the forecast, unless it gives notice of order cancellation in advance of applicable lead times. There have been no material changes in the Company's inventory purchase obligations compared to those discussed in Note 11 to its annual consolidated financial statements.

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Legal Proceedings

On June 8, 2020, Lynwood Investment CY Limited (“Lynwood”) filed a lawsuit in the United States District Court for the Northern District of California against the Company along with several other named defendants, including NGINX, Inc. (BVI), NGINX Software, Inc., NGINX, Inc. (DE), and BV NGINX, LLC. In its complaint, Lynwood claims to be the assignee of all rights and interests of Rambler Internet Holding LLC (“Rambler”), and alleges that the intellectual property in the NGINX software originally released by the co-founder of NGINX in 2004 belongs to Rambler (and therefore Lynwood, by assignment) because the software was created and developed while the co-founder was employed by Rambler. Lynwood asserts various causes of action, including copyright infringement, violation of trademark law, tortious interference, and fraud. The complaint seeks damages, disgorgement of profits, fees and costs, declarations of copyright and trademark ownership, trademark cancellations, and injunctive relief.

In addition to the above matter, the Company is subject to a variety of legal proceedings, claims, investigations, and litigation arising in the ordinary course of business, including intellectual property litigation. Management believes that the Company has meritorious defenses to the allegations made in its pending cases and intends to vigorously defend these lawsuits; however, the Company is unable currently to determine the ultimate outcome of these or similar matters or the potential exposure to loss, if any. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause it to incur costly litigation and/or substantial settlement charges that could have a material adverse effect on the Company's business, financial condition, results of operations, and cash flows.

The Company records an accrual for loss contingencies for legal proceedings when it believes that an unfavorable outcome is both (a) probable and (b) the amount or range of any possible loss is reasonably estimable. The Company has not recorded any accrual for loss contingencies associated with such legal proceedings or the investigations discussed above.

10. Income Taxes

The Company's tax provision for interim periods is determined using an estimated annual effective tax rate, adjusted for discrete items in the related period.

The effective tax rate was 20.4% and 23.1% for the three and nine months ended June 30, 2020, respectively, compared to 20.1% and 21.3% for the three and nine months ended June 30, 2019, respectively. The increase in the effective tax rate for the three and nine months ended June 30, 2020 as compared to the three and nine months ended June 30, 2019 is primarily due to the tax impact from stock-based compensation and other non-deductible expenses related to the acquisition of Shape Security, Inc., partially offset by a change in unrecognized tax benefits.

At June 30, 2020, the Company had $41.1 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. It is anticipated that the Company’s existing liabilities for unrecognized tax benefits will change within the next twelve months due to audit settlements or the expiration of statutes of limitations. The Company does not expect these changes to be material to the consolidated financial statements. The Company recognizes interest and, if applicable, penalties for any uncertain tax positions as a component of income tax expense.

The Company and its subsidiaries are subject to U.S. federal income tax as well as the income tax of multiple state and foreign jurisdictions. The Company has concluded all U.S. federal income tax matters for fiscal years through September 30, 2016. Major jurisdictions where there are wholly owned subsidiaries of F5 Networks, Inc. which require income tax filings include the United Kingdom, Japan, Singapore, Australia, and Israel. The earliest periods open for review by local taxing authorities are fiscal years 2018 for the United Kingdom, 2014 for Japan, 2015 for Singapore, 2016 for Australia, and 2013 for Israel. The Company is currently under audit by various states for fiscal years 2015 through 2018 and by Israel for fiscal years 2013 to 2017. Within the next four fiscal quarters, the statute of limitations will begin to close on fiscal years 2015 and 2016 state income tax returns and fiscal years 2014 to 2018 foreign income tax returns.

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11. Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common stock equivalent shares outstanding during the period. The Company's nonvested restricted units do not have nonforfeitable rights to dividends or dividend equivalents and are not considered participating securities that should be included in the computation of earnings per share under the two-class method.

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Numerator
Net income	$	69,872	$	85,905	$	229,778	$	332,897
Denominator
Weighted average shares outstanding — basic	60,978		59,981		60,831		59,963
Dilutive effect of common shares from stock options and restricted stock units	437		215		351		409
Weighted average shares outstanding — diluted	61,415		60,196		61,182		60,372
Basic net income per share	$	1.15	$	1.43	$	3.78	$	5.55
Diluted net income per share	$	1.14	$	1.43	$	3.76	$	5.51

Anti-dilutive stock-based awards excluded from the calculations of diluted earnings per share were immaterial for the three and nine months ended June 30, 2020 and 2019.

12. Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker, or decision-making group, in deciding how to allocate resources and in assessing performance. Management has determined that the Company is organized as, and operates in, one reportable operating segment: the development, marketing and sale of application services that optimize the security, performance and availability of network applications, servers and storage systems.

Revenues by Geographic Location and Other Information

The Company does business in three main geographic regions: the Americas (primarily the United States); Europe, the Middle East, and Africa (EMEA); and the Asia Pacific region (APAC). The Company's chief operating decision-maker reviews financial information presented on a consolidated basis accompanied by information about revenues by geographic region. The Company's foreign offices conduct sales, marketing and support activities. Revenues are attributed by geographic location based on the location of the customer.

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The following presents revenues by geographic region (in thousands):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Americas:
United States	$	309,645	$	273,273	$	887,336	$	820,061
Other	22,155		27,429		71,312		79,697
Total Americas	331,800		300,702		958,648		899,758
EMEA	141,249		132,806		445,186		418,339
Asia Pacific	110,203		129,886		332,172		333,962
	$	583,252	$	563,394	$	1,736,006	$	1,652,059

The following distributors of the Company's products accounted for more than 10% of total net revenue:

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Ingram Micro, Inc.	16.0	%	17.8	%	16.6	%	18.2	%
Westcon Group, Inc.	—		10.0	%	—		10.3	%
Arrow ECS	11.1	%	—		10.3	%	10.3	%
Tech Data	—		10.8	%	—		10.2	%

The Company tracks assets by physical location. Long-lived assets consist of property and equipment, net, and are shown below (in thousands):

	June 30, 2020		September 30, 2019
United States	$	195,261	$	194,176
EMEA	17,223		13,451
Other countries	15,809		15,799
	$	228,293	$	223,426

13. Restructuring Charges

In December 2019, the Company initiated a restructuring plan to match strategic and financial objectives and optimize resources for long term growth, including a reduction in force program affecting approximately 75 employees. The Company recorded a restructuring charge of $7.8 million in the first quarter of fiscal 2020. The Company does not expect to record any significant future charges related to the restructuring plan.

During the nine months ended June 30, 2020, the following activity was recorded (in thousands):

	Employee Severance, Benefits and Related Costs
Accrued expenses, October 1, 2019	$	—
Restructuring charges	7,800
Cash payments	(7,613)
Non-cash items	—
Accrued expenses, June 30, 2020	$	187

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Item 2.Management's Discussion and Analysis of Financial Condition and Results of Operations

The following discussion of our financial condition and results of operations contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 and Section 27A of the Securities Act of 1933. These statements include, but are not limited to, statements about our plans, objectives, expectations, strategies, intentions or other characterizations of future events or circumstances and are generally identified by the words "expects," "anticipates," "intends," "plans," "believes," "seeks," "estimates," and similar expressions. These forward-looking statements are based on current information and expectations and are subject to a number of risks and uncertainties. Our actual results could differ materially from those expressed or implied by these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in Part II, Item 1A. "Risk Factors" herein and in other documents we file from time to time with the Securities and Exchange Commission. We assume no obligation to revise or update any such forward-looking statements.

Overview

F5 is a leading provider of multi-cloud application services which enable our customers to develop, deploy, operate, secure, and govern applications in any architecture, from on-premises to the public cloud. Our enterprise-grade application services are available as cloud-based, software-as-a-service, and software-only solutions optimized for multi-cloud environments, with modules that can run independently, or as part of an integrated solution on our high-performance appliances. We market and sell our products primarily through multiple indirect sales channels in the Americas (primarily the United States); Europe, the Middle East, and Africa (EMEA); and the Asia Pacific region (APAC). Enterprise customers (Fortune 1000 or Business Week Global 1000 companies) in the technology, telecommunications, financial services, transportation, education, manufacturing and healthcare industries, along with government customers, continue to make up the largest percentage of our customer base.

Our management team monitors and analyzes a number of key performance indicators in order to manage our business and evaluate our financial and operating performance on a consolidated basis. Those indicators include:

•Revenues. The majority of our revenues are derived from sales of our application delivery controller (ADC) products including our BIG-IP appliances and VIPRION chassis and related software modules and our software-only Virtual Editions; Local Traffic Manager (LTM), DNS Services (formerly Global Traffic Manager); Advanced Firewall Manager (AFM) and Policy Enforcement Manager (PEM), that leverage the unique performance characteristics of our hardware and software architecture; and products that incorporate acquired technology, including Application Security Manager (ASM) and Access Policy Manager (APM); NGINX Plus and NGINX Controller; Shape Defense and Enterprise Defense; and the Secure Web Gateway and Silverline DDoS and Application security offerings which are sold to customers on a subscription basis. We also derive revenues from the sales of services including annual maintenance contracts, training and consulting services. We carefully monitor the sales mix of our revenues within each reporting period. We believe customer acceptance rates of our new products and feature enhancements are indicators of future trends. We also consider overall revenue concentration by customer and by geographic region as additional indicators of current and future trends. We are also monitoring the uncertainty related to the impacts that the COVID-19 pandemic has on the global economy and our customer base.

•Cost of revenues and gross margins. We strive to control our cost of revenues and thereby maintain our gross margins. Significant items impacting cost of revenues are hardware costs paid to our contract manufacturers, third-party software license fees, software-as-a-service infrastructure, amortization of developed technology and personnel and overhead expenses. Our margins have remained relatively stable; however, factors such as sales price, product and services mix, inventory obsolescence, returns, component price increases, warranty costs, and the uncertainty surrounding the COVID-19 pandemic and its potential impacts to our supply chain could significantly impact our gross margins from quarter to quarter and represent significant indicators we monitor on a regular basis.

•Operating expenses. Operating expenses are substantially driven by personnel and related overhead expenses. Existing headcount and future hiring plans are the predominant factors in analyzing and forecasting future operating expense trends. Other significant operating expenses that we monitor include marketing and promotions, travel, professional fees, computer costs related to the development of new products and provision of services, facilities and depreciation expenses.

•Liquidity and cash flows. Our financial condition remains strong with significant cash and investments. The decrease in cash and investments for the first nine months of fiscal year 2020 was primarily due to $955.6 million in cash paid for the acquisition of Shape in the second quarter of fiscal 2020, partially offset by cash provided by operating activities of $485.0 million. Going forward, we believe the primary driver of cash flows will be net income from operations. Capital expenditures of $47.9 million for the first nine months of fiscal year 2020 were primarily related to the expansion of our facilities to support our operations worldwide as well as investments in information technology

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infrastructure and equipment purchases to support our core business activities. We will continue to evaluate possible acquisitions of, or investments in businesses, products, or technologies that we believe are strategic, which may require the use of cash. Additionally, on January 31, 2020, we entered into a Revolving Credit Agreement (the "Revolving Credit Agreement") that provides for a senior unsecured revolving credit facility in an aggregate principal amount of $350.0 million (the "Revolving Credit Facility"). We have the option to increase commitments under the Revolving Credit Facility from time to time, subject to certain conditions, by up to $150.0 million. As of June 30, 2020, there were no outstanding borrowings under the Revolving Credit Facility, and we had available borrowing capacity of $350.0 million.

•Balance sheet. We view cash, short-term and long-term investments, deferred revenue, accounts receivable balances and days sales outstanding as important indicators of our financial health. Deferred revenues remained relatively flat in the third quarter of fiscal year 2020 from the prior quarter. Our days sales outstanding at the end of the third quarter of fiscal year 2020 was 47. Days sales outstanding is calculated by dividing ending accounts receivable by revenue per day for a given quarter.

Summary of Critical Accounting Policies and Estimates

The preparation of our financial condition and results of operations requires us to make judgments and estimates that may have a significant impact upon our financial results. We believe that, of our significant accounting policies, the following require estimates and assumptions that require complex, subjective judgments by management, which can materially impact reported results: revenue recognition, accounting for business combinations and accounting for leases. Actual results may differ from these estimates under different assumptions or conditions.

Except for the accounting policies for leases that were updated as a result of adopting ASC Topic 842, there were no material changes to our critical accounting policies and estimates compared to the critical accounting policies and estimates described in "Management's Discussion and Analysis of Financial Condition and Results of Operations" in the Form 10-K for the fiscal year ended September 30, 2019. Refer to the "Recently Adopted Accounting Standards" section of Note 1 and Note 8 - Leases in this Quarterly Report on Form 10-Q for a summary of the new accounting policies under ASC Topic 842.

COVID-19 Update

Management has prioritized a human-first approach to the COVID-19 pandemic. For F5, this means ensuring the health and safety of employees, their families and our communities. Further, this approach extends to our customers as we look for ways that we can support their operations during this crisis.

While our analysis shows COVID-19 did not have a significant impact on our results of operations for the quarter ended June 30, 2020, the impacts of the global pandemic on our business and financial outlook are currently unknown. We are conducting business with substantial modifications to employee travel, employee work locations, and virtualization or cancellation of certain sales and marketing events, among other modifications. We will continue to actively monitor the situation and may take further actions that alter our business operations as may be required by federal, state or local authorities, or that we determine are in the best interests of our employees, customers, partners, suppliers and stockholders. It is not clear what the potential effects any such alterations or modifications may have on our business, including the effects on our customers and prospects, or on our financial results.

Results of Operations

The following discussion and analysis should be read in conjunction with our consolidated financial statements, related notes and risk factors included elsewhere in this Quarterly Report on Form 10-Q.

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	Three months ended June 30,						Nine months ended June 30,
	2020			2019			2020			2019
	(in thousands, except percentages)
Net Revenues
Products	$	253,331		$	248,929		$	747,405		$	720,665
Services	329,921			314,465			988,601			931,394
Total	$	583,252		$	563,394		$	1,736,006		$	1,652,059
Percentage of net revenues
Products	43.4		%	44.2		%	43.1		%	43.6		%
Services	56.6			55.8			56.9			56.4
Total	100.0		%	100.0		%	100.0		%	100.0		%

Net revenues. Total net revenues increased 3.5% and 5.1% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. Overall revenue growth for the three and nine months ended June 30, 2020, was primarily due to increased software product revenue including our subscription-based software products and increased service revenues as a result of our increased installed base of products. International revenues represented 46.9% and 48.9% of total net revenues for the three and nine months ended June 30, 2020, respectively, compared to 51.5% and 50.4% for the same periods in the prior year, respectively.

Net product revenues increased 1.8% and 3.7% for the three and nine months ended June 30, 2020, respectively, from the comparable periods on the prior year. The increase in net product revenues for the three and nine months ended June 30, 2020 was primarily due to an increase in software product sales compared to the same periods in the prior year.

Net service revenues increased 4.9% and 6.1% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. The increase in net service revenues was primarily due to increases in the purchase or renewal of maintenance contracts driven by additions to our installed base of products.

The following distributors of our products accounted for more than 10% of total net revenue:

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Ingram Micro, Inc.	16.0	%	17.8	%	16.6	%	18.2	%
Westcon Group, Inc.	—		10.0	%	—		10.3	%
Arrow ECS	11.1	%	—		10.3	%	10.3	%
Tech Data	—		10.8	%	—		10.2	%

The following distributors of our products accounted for more than 10% of total receivables:

	June 30, 2020		September 30, 2019
Ingram Micro, Inc.	—		12.4	%
Arrow ECS	15.3	%	—
Carahsoft Technology	—		11.5	%
Synnex Corporation	12.8	%	12.9	%

No other distributors accounted for more than 10% of total net revenue or receivables. 

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	Three months ended June 30,						Nine months ended June 30,
	2020			2019			2020			2019
	(in thousands, except percentages)
Cost of net revenues and gross profit
Products	$	57,437		$	44,336		$	152,641		$	130,293
Services	48,603			46,431			143,279			135,366
Total	106,040			90,767			295,920			265,659
Gross profit	$	477,212		$	472,627		$	1,440,086		$	1,386,400
Percentage of net revenues and gross profit (as a percentage of related net revenue)
Products	22.7		%	17.8		%	20.4		%	18.1		%
Services	14.7			14.8			14.5			14.5
Total	18.2			16.1			17.0			16.1
Gross profit	81.8		%	83.9		%	83.0		%	83.9		%

Cost of net product revenues. Cost of net product revenues consist of finished products purchased from our contract manufacturers, manufacturing overhead, freight, warranty, provisions for excess and obsolete inventory and amortization expenses in connection with developed technology from acquisitions. Cost of net product revenues increased $13.1 million and $22.3 million, or 29.5% and 17.2% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. The increase in cost of net product revenues was primarily due to software product revenue growth for the three and nine months ended June 30, 2020 from the comparable periods in the prior year.

Cost of net service revenues. Cost of net service revenues consist of the salaries and related benefits of our professional services staff, travel, facilities and depreciation expenses. For the three and nine months ended June 30, 2020, cost of net service revenues as a percentage of net service revenues was 14.7% and 14.5%, respectively, compared to 14.8% and 14.5% for the comparable periods in the prior year, respectively. Professional services headcount at the end of June 2020 increased to 950 from 926 at the end of June 2019.

	Three months ended June 30,						Nine months ended June 30,
	2020			2019			2020			2019
	(in thousands, except percentages)
Operating expenses
Sales and marketing	$	211,808		$	195,852		$	622,799		$	531,065
Research and development	115,991			116,894			321,024			305,246
General and administrative	61,792			57,141			194,809			146,340
Restructuring charges	—			—			7,800			—
Total	$	389,591		$	369,887		$	1,146,432		$	982,651
Operating expenses (as a percentage of net revenue)
Sales and marketing	36.3		%	34.8		%	35.9		%	32.1		%
Research and development	19.9			20.7			18.5			18.5
General and administrative	10.6			10.2			11.2			8.9
Restructuring charges	—			—			0.4			—
Total	66.8		%	65.7		%	66.0		%	59.5		%

Sales and marketing. Sales and marketing expenses consist of salaries, commissions and related benefits of our sales and marketing staff, the costs of our marketing programs, including public relations, advertising and trade shows, travel, facilities, and depreciation expenses. Sales and marketing expenses increased $16.0 million and $91.7 million, or 8.1% and 17.3% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. The increase in sales and marketing expense was primarily due to an increase of $15.8 million and $53.5 million in personnel costs for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. Sales and marketing for the nine months ended June 30, 2020 also included an increase in commissions of $11.6 million from the comparable period in the prior year. The increase in sales and marketing expenses for the three and nine months ended June 30, 2020 was partially offset by a decrease in travel and entertainment expenses primarily due to company-wide travel restrictions as a result of the COVID-19 pandemic. Sales and marketing headcount at the end of June 2020 increased to 2,386 from 2,092 at the end of June 2019. Sales and marketing expenses included stock-based compensation expense of $21.8 million and $66.2 million for the three and nine

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months ended June 30, 2020, respectively, compared to $17.8 million and $49.6 million for the same periods in the prior year, respectively.

Research and development. Research and development expenses consist of the salaries and related benefits of our product development personnel, prototype materials and other expenses related to the development of new and improved products, facilities and depreciation expenses. Research and development expenses decreased $0.9 million and increased $15.8 million, or decreased 0.8% and increased 5.2% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. The change in research and development expense was primarily due to a decrease of $5.3 million and an increase of $6.3 million in personnel costs for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. Research and development expenses for the nine months ended June 30, 2020 also included an increase of $3.4 million in facilities costs from the comparable period in the prior year, primarily due to the move of our corporate headquarters which began in April 2019. Research and development headcount at the end of June 2020 increased to 1,771 from 1,492 at the end of June 2019. Research and development expenses included stock-based compensation expense of $13.1 million and $36.9 million for the three and nine months ended June 30, 2020, respectively, compared to $10.0 million and $30.6 million for the same periods in the prior year, respectively.

General and administrative. General and administrative expenses consist of the salaries, benefits and related costs of our executive, finance, information technology, human resource and legal personnel, third-party professional service fees, facilities and depreciation expenses. General and administrative expenses increased $4.7 million and $48.5 million, or 8.1% and 33.1% for the three and nine months ended June 30, 2020, respectively, from the comparable periods in the prior year. The increase in general and administrative expenses for the nine months ended June 30, 2020 was primarily due to an increase of $19.7 million in fees paid to outside consultants for legal, accounting and tax services, from the comparable period in the prior year. For the three and nine months ended June 30, 2020, personnel costs increased $3.4 million and $13.7 million, respectively, from the comparable periods in the prior year due to growth in general and administrative headcount, including employees from the acquisitions of NGINX and Shape. General and administrative expenses for the nine months ended June 30, 2020 also included an increase in facilities cost of $3.0 million from the comparable period in the prior year, primarily due to the move of our corporate headquarters which began in April 2019. General and administrative headcount at the end of June 2020 increased to 679 from 581 at the end of June 2019. General and administrative expenses included stock-based compensation expense of $9.2 million and $28.0 million for the three and nine months ended June 30, 2020, respectively, compared to $8.1 million and $23.8 million for the same periods in the prior year, respectively.

Restructuring charges. In the first fiscal quarter of 2020, we completed a restructuring plan to align strategic and financial objectives and optimize resources for long term growth. As a result of these initiatives, we recorded a restructuring charge of $7.8 million related to a reduction in workforce that is reflected in our results for the nine months ended June 30, 2020. There were no restructuring expenses recorded in fiscal 2019.

	Three months ended June 30,						Nine months ended June 30,
	2020			2019			2020			2019
	(in thousands, except percentages)
Other income and income taxes
Income from operations	$	87,621		$	102,740		$	293,654		$	403,749
Other income, net	141			4,722			5,220			19,251
Income before income taxes	87,762			107,462			298,874			423,000
Provision for income taxes	17,890			21,557			69,096			90,103
Net income	$	69,872		$	85,905		$	229,778		$	332,897
Other income and income taxes (as percentage of net revenue)
Income from operations	15.0		%	18.2		%	16.9		%	24.4		%
Other income, net	—			0.8			0.3			1.2
Income before income taxes	15.0			19.0			17.2			25.6
Provision for income taxes	3.0			3.8			4.0			5.5
Net income	12.0		%	15.2		%	13.2		%	20.1		%

Other income, net. Other income, net consists primarily of interest income and expense and foreign currency transaction gains and losses. The decrease in other income, net for the three and nine months ended June 30, 2020 was primarily due to a decrease in interest income of $3.6 million and $9.1 million, respectively, from our investments compared to the same periods in the prior year. In addition, interest expense increased $2.6 million and $4.9 million for the three and nine months ended June 30, 2020 compared to the same periods in the prior year.

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Provision for income taxes. The effective tax rate was 20.4% and 23.1% for the three and nine months ended June 30, 2020, respectively, compared to 20.1% and 21.3% for the three and nine months ended June 30, 2019, respectively. The increase in the effective tax rate for the three and nine months ended June 30, 2020 as compared to the three and nine months ended June 30, 2019 is primarily due to the tax impact from stock-based compensation and other non-deductible expenses related to the acquisition of Shape Security, Inc., partially offset by a change in unrecognized tax benefits.

We record a valuation allowance to reduce our deferred tax assets to the amount we believe is more likely than not to be realized. In making these determinations we consider historical and projected taxable income, and ongoing prudent and feasible tax planning strategies in assessing the appropriateness of a valuation allowance. Our net deferred tax assets at June 30, 2020 and September 30, 2019 were $47.5 million and $27.4 million, respectively. The net deferred tax assets include valuation allowances of $31.0 million and $23.5 million as of June 30, 2020 and September 30, 2019, respectively, which are primarily related to certain state and foreign net operating losses and tax credit carryforwards.

Our worldwide effective tax rate may fluctuate based on a number of factors, including variations in projected taxable income in the various geographic locations in which we operate, changes in the valuation of our net deferred tax assets, resolution of potential exposures, tax positions taken on tax returns filed in the various geographic locations in which we operate, and the introduction of new accounting standards or changes in tax laws or interpretations thereof in the various geographic locations in which we operate. We have recorded liabilities to address potential tax exposures related to business and income tax positions we have taken that could be challenged by taxing authorities. The ultimate resolution of these potential exposures may be greater or less than the liabilities recorded which could result in an adjustment to our future tax expense.

Liquidity and Capital Resources

Cash and cash equivalents, short-term investments and long-term investments totaled $1,206.5 million as of June 30, 2020, compared to $1,330.7 million as of September 30, 2019, representing a decrease of $124.2 million. The decrease was primarily due to $955.6 million in cash paid for the acquisition of Shape in the second quarter of fiscal 2020, partially offset by cash provided by operating activities of $485.0 million for the nine months ended June 30, 2020. Cash provided by operating activities for the first nine months of fiscal year 2020 resulted from net income of $229.8 million combined with changes in operating assets and liabilities, as adjusted for various non-cash items including stock-based compensation, deferred revenue, depreciation and amortization charges.

Cash from operations could be affected by various risks and uncertainties, including, but not limited to, the effects of the COVID-19 pandemic and other risks detailed in Part II, Item 1A titled “Risk Factors”. However, we anticipate our current cash, cash equivalents and investment balances, anticipated cash flows generated from operations, and available borrowing capacity on the Revolver Credit Facility will be sufficient to meet our liquidity needs.

Cash used in investing activities was $762.8 million for the nine months ended June 30, 2020, compared to cash used in investing activities of $120.6 million for the same period in the prior year. Investing activities include purchases, sales and maturities of available-for-sale securities, business acquisitions and capital expenditures. The amount of cash used in investing activities for the nine months ended June 30, 2020 was primarily the result of $955.6 million in cash paid for the acquisition of Shape, along with capital expenditures related to the build-out of our new corporate headquarters and the purchase of investments, partially offset by the maturity and sale of investments.

Cash provided by financing activities was $394.0 million for the nine months ended June 30, 2020, compared to cash used in financing activities of $155.6 million for the same period in the prior year. Our financing activities for the nine months ended June 30, 2020 primarily consisted of $400.0 million in cash proceeds from a term loan as well as cash received from the exercise of employee stock options and stock purchases under our employee stock purchase plan of $52.0 million, partially offset by $50.0 million in cash used to repurchase common stock under our share repurchase program and $5.0 million in cash used to make a principal payment on our term loan.

On January 31, 2020, we entered into a Revolving Credit Agreement (the "Revolving Credit Agreement") that provides for a senior unsecured revolving credit facility in an aggregate principal amount of $350.0 million (the "Revolving Credit Facility"). We have the option to increase commitments under the Revolving Credit Facility from time to time, subject to certain conditions, by up to $150.0 million. As of June 30, 2020, there were no outstanding borrowings under the Revolving Credit Facility, and we had available borrowing capacity of $350.0 million.

Obligations and Commitments

As of June 30, 2020, our principal commitments consisted of borrowings under the Term Loan Facility and obligations outstanding under operating leases.

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In connection with the acquisition of Shape, on January 24, 2020, we entered into a Term Credit Agreement ("Term Credit Agreement") with certain institutional lenders that provides for a senior unsecured term loan facility in an aggregate principal amount of $400.0 million (the "Term Loan Facility"). The proceeds from the Term Loan Facility were primarily used to finance the acquisition of Shape and related expenses. As of June 30, 2020, $395.0 million of principal amount under the Term Loan Facility was outstanding. There is a financial covenant that requires us to maintain a leverage ratio, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. This covenant may result in a higher interest rate on our outstanding principal borrowings on the Term Loan Facility in future periods, depending on the Company's performance. We will monitor the effect that the COVID-19 pandemic may have on our leverage ratio calculation but do not believe there will be a material impact to the interest payable on our borrowings under the Term Loan Facility. Refer to Note 7 for the scheduled principal maturities of the Term Loan Facility as of June 30, 2020.

We lease our facilities under operating leases that expire at various dates through 2033. There have been no material changes in our principal lease commitments compared to those discussed in Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019.

We outsource the manufacturing of our pre-configured hardware platforms to contract manufacturers who assemble each product to our specifications. Our agreement with our largest contract manufacturer allows them to procure component inventory on our behalf based upon a rolling production forecast. We are contractually obligated to purchase the component inventory in accordance with the forecast, unless we give notice of order cancellation in advance of applicable lead times.

Recent Accounting Pronouncements

The anticipated impact of recent accounting pronouncements is discussed in Note 1 to the accompanying Notes to Consolidated Financial Statements of this Quarterly Report on Form 10-Q.

Item 3.Quantitative and Qualitative Disclosures About Market Risk

Interest Rate Risk. We maintain an investment portfolio of various holdings, types, and maturities. Our primary objective for holding fixed income securities is to achieve an appropriate investment return consistent with preserving principal and managing risk. At any time, a sharp rise in market interest rates could have a material adverse impact on the fair value of our fixed income investment portfolio. Conversely, declines in interest rates, including the impact from lower credit spreads, could have a material adverse impact on interest income for our investment portfolio. Our fixed income investments are held for purposes other than trading. Our fixed income investments were not leveraged as of June 30, 2020. We monitor our interest rate and credit risks, including our credit exposures to specific rating categories and to individual issuers. As of June 30, 2020, 37.3% of our fixed income securities balance consisted of U.S. government and U.S. government agency securities. We believe the overall credit quality of our portfolio is strong.

Refer to Note 7 for information on our recent borrowings under the Term Loan Facility. Borrowings under the Term Loan Facility bear interest at a rate equal to, at our option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on our leverage ratio, or (b) an alternate base rate determined in accordance with the Term Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on our leverage ratio.

The Term Loan Facility requires us to maintain a leverage ratio financial covenant, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. This covenant may result in a higher interest rate on our outstanding principal borrowings on the Term Loan Facility in future periods, depending on the Company's performance. At any time, a sharp rise in market interest rates could have a material adverse impact on the interest payable on outstanding principal borrowings on our Term Loan Facility. We monitor our interest rate and credit risks, which include the effect that the COVID-19 pandemic may have on interest rates on principal borrowings under the Term Loan Facility. As of June 30, 2020, we have not noted any adverse impacts to interest rates that would have a material impact to interest owed on principal borrowings.

Foreign Currency Risk. The majority of our sales and expenses are denominated in U.S. dollars and as a result, we have not experienced significant foreign currency transaction gains and losses to date.

Management believes there have been no material changes to our quantitative and qualitative disclosures about market risk during the nine month period ended June 30, 2020, compared to those discussed in our Annual Report on Form 10-K for the year ended September 30, 2019, other than market risk that is created by the global market disruptions and uncertainties resulting from the COVID-19 pandemic. See the section “Risk Factors” for further discussion of the possible impact to our business.

32

Item 4.Controls and Procedures

Our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) are designed to ensure that required information is properly recorded, processed, summarized and reported within the required timeframe, as specified in the rules set forth by the SEC. Our disclosure controls and procedures are also designed to ensure that information required to be disclosed is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosures.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2020. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that our disclosure controls and procedures were effective as of June 30, 2020.

Changes in Internal Control over Financial Reporting

During the third quarter of fiscal 2020, there were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) or 15d-15(f) of the Exchange Act) that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Although the entire global F5 workforce is working remotely as a result of the COVID-19 pandemic, there were no material changes to our existing internal controls over financial reporting as a result of this.

PART II — OTHER INFORMATION

Item 1.Legal Proceedings

See Note 9 - Commitments and Contingencies of the Notes to Financial Statements (Part I, Item 1 of this Form 10-Q) for information regarding legal proceedings in which we are involved.

Item 1A.Risk Factors

The following information updates, and should be read in conjunction with, the information discussed in Part I, Item 1A. "Risk Factors" in our Annual Report on Form 10-K for the fiscal year ended September 30, 2019. The risks discussed below and in our Annual Report on Form 10-K could materially affect our business, financial condition and future results. These are not the only risks facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be insignificant also may materially and adversely affect our business, financial condition or operating results in the future.

The effects of a pandemic or widespread health epidemic such as the coronavirus outbreak could have a material adverse effect on our business and results of operations

In March 2020, the World Health Organization declared COVID-19 a global pandemic. The impact on the global population and the duration of the COVID-19 pandemic is difficult to assess or predict and depends on numerous evolving factors that we may not be able to accurately predict or effectively respond to, including, without limitation: the duration and scope of the outbreak; actions taken by governments, businesses, and individuals in response to the outbreak; the effect on economic activity and actions taken in response.

The impact of the COVID-19 pandemic on our operations is not yet certain, which may or may not adversely disrupt or impact, and is not limited to the following areas: customer demand for our products and services, reductions in customer spend, delayed or the inability to collect from our customers, disruptions to our supply chain that could result in delays, shortages or increased costs of our products, disruptions to our operations in servicing our customers as a result of working remotely or business location closures, which all may adversely impact our business, results of operations and overall financial performance in future periods.

Item 2.Unregistered Sales of Equity Securities and Use of Proceeds

On October 31, 2018, the Company announced that its Board of Directors authorized an additional $1.0 billion for its common stock share repurchase program. This new authorization is incremental to the existing $4.4 billion program, initially approved in October 2010 and expanded in each fiscal year. Acquisitions for the share repurchase programs will be made from time to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. The Company did not repurchase and retire any shares during the three months ended June 30, 2020.

33

Item 4.Mine Safety Disclosures

Not applicable.

Item 5.Other Information

None.

Item 6.Exhibits

Exhibit Number		Exhibit Description
31.1*	—	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2*	—	Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	—	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS*	—	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH*	—	Inline XBRL Taxonomy Extension Schema Document
101.CAL*	—	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*	—	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*	—	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*	—	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104*	—	Cover Page Interactive Data File (embedded within the Inline XBRL document)

*  Filed herewith.

34

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on this 5th day of August, 2020.

F5 NETWORKS, INC.
By:	/s/ FRANCIS J. PELZER
	Francis J. Pelzer
	Executive Vice President,
	Chief Financial Officer
	(principal financial officer and principal accounting officer)

35

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, François Locoh-Donou, certify that:

1)I have reviewed this Quarterly Report on Form 10-Q of F5 Networks, Inc.;

2)Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3)Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4)The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal controls over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controls over financial reporting; and

5)The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting, which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 5, 2020
/s/ FRANÇOIS LOCOH-DONOU
François Locoh-Donou
Chief Executive Officer and President

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Francis J. Pelzer, certify that:

1)I have reviewed this Quarterly Report on Form 10-Q of F5 Networks, Inc.;

2)Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3)Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4)The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant’s internal controls over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controls over financial reporting; and

5)The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting, which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	August 5, 2020
/s/ FRANCIS J. PELZER
Francis J. Pelzer
Executive Vice President,
Chief Financial Officer
(principal financial officer and principal accounting officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of F5 Networks, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2020 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), we, François Locoh-Donou, President and Chief Executive Officer and Francis J. Pelzer, Executive Vice President and Chief Financial Officer (principal financial officer and principal accounting officer) of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	August 5, 2020
/s/ FRANÇOIS LOCOH-DONOU
François Locoh-Donou
Chief Executive Officer and President
/s/ FRANCIS J. PELZER
Francis J. Pelzer
Executive Vice President and Chief Financial Officer
(principal financial officer and principal accounting officer)

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to F5 Networks, Inc., and will be retained by F5 Networks, Inc., and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover Page - shares	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Jul. 31, 2020
Cover [Abstract]
Document Type		10-Q
Document Quarterly Report		true
Document Period End Date		Jun. 30, 2020
Document Transition Report		false
Entity File Number		000-26041
Entity Registrant Name		F5 NETWORKS, INC.
Entity Incorporation, State or Country Code		WA
Entity Tax Identification Number		91-1714307
Entity Address, Address Line One		801 5th Avenue
Entity Address, City or Town		Seattle
Entity Address, State or Province		WA
Entity Address, Postal Zip Code		98104
City Area Code		206
Local Phone Number		272-5555
Title of 12(b) Security		Common stock, no par value
Trading Symbol		FFIV
Security Exchange Name		NASDAQ
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			61,173,109
Entity Central Index Key		0001048695
Current Fiscal Year End Date		--09-30
Document Fiscal Year Focus		2020
Document Fiscal Period Focus	Q3
Amendment Flag		false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Current assets
Cash and cash equivalents	$ 714,268	$ 599,219
Short-term investments	379,303	373,063
Accounts receivable, net of allowances of $3,343 and $3,259	304,874	322,029
Inventories	28,826	34,401
Other current assets	238,163	182,874
Total current assets	1,665,434	1,511,586
Property and equipment, net	228,293	223,426
Operating lease right-of-use assets	316,761	0
Long-term investments	112,928	358,402
Deferred tax assets	47,919	27,701
Goodwill	1,858,966	1,065,379
Other assets, net	343,056	203,781
Total assets	4,573,357	3,390,275
Current liabilities
Accounts payable	54,389	62,627
Accrued liabilities	301,038	235,869
Deferred revenue	888,614	807,030
Current portion of long-term debt	19,275	0
Total current liabilities	1,263,316	1,105,526
Deferred tax liabilities	444	313
Deferred revenue, long-term	386,438	391,086
Operating lease liabilities, long-term	345,577	0
Long-term debt	373,866	0
Other long-term liabilities	49,817	131,853
Total long-term liabilities	1,156,142	523,252
Commitments and contingencies (Note 9)
Shareholders' equity
Preferred stock, no par value; 10,000 shares authorized, no shares outstanding	0	0
Common stock, no par value; 200,000 shares authorized, 61,164 and 60,367 shares issued and outstanding	304,526	142,597
Accumulated other comprehensive loss	(18,495)	(19,190)
Retained earnings	1,867,868	1,638,090
Total shareholders' equity	2,153,899	1,761,497
Total liabilities and shareholders' equity	$ 4,573,357	$ 3,390,275

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 3,343	$ 3,259
Preferred stock, par value (dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (dollars per share)	$ 0	$ 0
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	61,164,000	60,367,000

XML

Consolidated Income Statements - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net revenues
Revenue from contract with customer, excluding assessed tax	$ 583,252	$ 563,394	$ 1,736,006	$ 1,652,059
Cost of net revenues
Cost of net revenues	106,040	90,767	295,920	265,659
Gross profit	477,212	472,627	1,440,086	1,386,400
Operating expenses
Sales and marketing	211,808	195,852	622,799	531,065
Research and development	115,991	116,894	321,024	305,246
General and administrative	61,792	57,141	194,809	146,340
Restructuring charges	0	0	7,800	0
Total	389,591	369,887	1,146,432	982,651
Income from operations	87,621	102,740	293,654	403,749
Other income, net	141	4,722	5,220	19,251
Income before income taxes	87,762	107,462	298,874	423,000
Provision for income taxes	17,890	21,557	69,096	90,103
Net income	$ 69,872	$ 85,905	$ 229,778	$ 332,897
Net income per share — basic (dollars per share)	$ 1.15	$ 1.43	$ 3.78	$ 5.55
Weighted average shares — basic (shares)	60,978	59,981	60,831	59,963
Net income per share — diluted (dollars per share)	$ 1.14	$ 1.43	$ 3.76	$ 5.51
Weighted average shares — diluted (shares)	61,415	60,196	61,182	60,372
Product
Net revenues
Revenue from contract with customer, excluding assessed tax	$ 253,331	$ 248,929	$ 747,405	$ 720,665
Cost of net revenues
Cost of net revenues	57,437	44,336	152,641	130,293
Service
Net revenues
Revenue from contract with customer, excluding assessed tax	329,921	314,465	988,601	931,394
Cost of net revenues
Cost of net revenues	$ 48,603	$ 46,431	$ 143,279	$ 135,366

XML

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 69,872	$ 85,905	$ 229,778	$ 332,897
Other comprehensive income:
Foreign currency translation adjustment	184	118	(768)	61
Available-for-sale securities:
Unrealized gains on securities, net of taxes of $490 and $197 for the three months ended June 30, 2020 and 2019, respectively, and $146 and $940 for the nine months ended June 30, 2020 and 2019, respectively	4,061	918	1,230	3,811
Reclassification adjustment for realized losses included in net income, net of taxes of $(47) and $(35) for the three months ended June 30, 2020 and 2019, respectively, and $(65) and $(35) for the nine months ended June 30, 2020 and 2019, respectively	163	112	233	113
Net change in unrealized gains on available-for-sale securities, net of tax	4,224	1,030	1,463	3,924
Total other comprehensive income	4,408	1,148	695	3,985
Comprehensive income	$ 74,280	$ 87,053	$ 230,473	$ 336,882

XML

Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Tax effect of unrealized gain (loss) on securities	$ 490	$ 197	$ 146	$ 940
Tax effect of reclassification adjustment for realized (gains) losses	$ (47)	$ (35)	$ (65)	$ (35)

XML

Consolidated Statements of Shareholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	AOCI Attributable to Parent	Retained Earnings
Beginning Balance (in shares) at Sep. 30, 2018		60,215
Beginning Balance at Sep. 30, 2018	$ 1,285,492	$ 20,427	$ (22,178)	$ 1,287,243
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options (in shares)		1
Exercise of employee stock options	16	$ 16
Issuance of stock under employee stock purchase plan (in shares)		334
Issuance of stock under employee stock purchase plan	45,439	$ 45,439
Issuance of restricted stock (in shares)		765
Issuance of restricted stock	0
Repurchase of common stock (in shares)		(1,186)
Repurchase of common stock	(201,045)	$ (88,110)		(112,935)
Stock-based compensation	120,950	$ 120,950
Net income	332,897			332,897
Other comprehensive income	3,985		3,985
Ending Balance ( in shares) at Jun. 30, 2019		60,129
Ending Balance at Jun. 30, 2019	1,623,782	$ 98,722	(18,193)	1,543,253
Beginning Balance (in shares) at Mar. 31, 2019		59,695
Beginning Balance at Mar. 31, 2019	1,467,408	$ 29,401	(19,341)	1,457,348
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options (in shares)		1
Exercise of employee stock options	16	$ 16
Issuance of stock under employee stock purchase plan (in shares)		199
Issuance of stock under employee stock purchase plan	26,539	$ 26,539
Issuance of restricted stock (in shares)		234
Issuance of restricted stock	0
Stock-based compensation	42,766	$ 42,766
Net income	85,905			85,905
Other comprehensive income	1,148		1,148
Ending Balance ( in shares) at Jun. 30, 2019		60,129
Ending Balance at Jun. 30, 2019	$ 1,623,782	$ 98,722	(18,193)	1,543,253
Beginning Balance (in shares) at Sep. 30, 2019	60,367	60,367
Beginning Balance at Sep. 30, 2019	$ 1,761,497	$ 142,597	(19,190)	1,638,090
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options (in shares)		72
Exercise of employee stock options	1,760	$ 1,760
Issuance of stock under employee stock purchase plan (in shares)		419
Issuance of stock under employee stock purchase plan	50,239	$ 50,239
Issuance of restricted stock (in shares)		748
Issuance of restricted stock	0
Repurchase of common stock (in shares)		(442)
Repurchase of common stock	(50,009)	$ (50,009)
Stock-based compensation	159,939	$ 159,939
Net income	229,778			229,778
Other comprehensive income	$ 695		695
Ending Balance ( in shares) at Jun. 30, 2020	61,164	61,164
Ending Balance at Jun. 30, 2020	$ 2,153,899	$ 304,526	(18,495)	1,867,868
Beginning Balance (in shares) at Mar. 31, 2020		60,629
Beginning Balance at Mar. 31, 2020	1,998,194	$ 223,101	(22,903)	1,797,996
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of employee stock options (in shares)		41
Exercise of employee stock options	987	$ 987
Issuance of stock under employee stock purchase plan (in shares)		250
Issuance of stock under employee stock purchase plan	29,570	$ 29,570
Issuance of restricted stock (in shares)		244
Issuance of restricted stock	0
Stock-based compensation	50,868	$ 50,868
Net income	69,872			69,872
Other comprehensive income	$ 4,408		4,408
Ending Balance ( in shares) at Jun. 30, 2020	61,164	61,164
Ending Balance at Jun. 30, 2020	$ 2,153,899	$ 304,526	$ (18,495)	$ 1,867,868

XML

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities
Net income	$ 229,778	$ 332,897
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	149,315	119,182
Depreciation and amortization	69,337	46,645
Non-cash operating lease costs	29,731
Other	168	671
Deferred income taxes	4,357	10,171
Changes in operating assets and liabilities (excluding effects of the acquisition of businesses):
Accounts receivable	38,024	(16,249)
Inventories	5,575	(5,441)
Other current assets	(33,572)	(54,381)
Other assets	(5,659)	(8,785)
Accounts payable and accrued liabilities	(1,538)	37,932
Deferred revenue	37,934	79,113
Lease liabilities	(38,456)
Net cash provided by operating activities	484,994	541,755
Investing activities
Purchases of investments	(390,696)	(210,109)
Maturities of investments	322,271	507,804
Sales of investments	309,040	276,278
Acquisition of businesses, net of cash acquired	(955,574)	(611,550)
Purchases of property and equipment	(47,857)	(83,008)
Net cash used in investing activities	(762,816)	(120,585)
Financing activities
Proceeds from the exercise of stock options and purchases of stock under employee stock purchase plan	51,999	45,455
Repurchase of common stock	(50,009)	(201,045)
Proceeds from term debt agreement	400,000	0
Payments on term debt agreement	(5,000)	0
Payments for debt issuance costs	(3,040)	0
Net cash provided by (used in) financing activities	393,950	(155,590)
Net increase in cash, cash equivalents and restricted cash	116,128	265,580
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(856)	(111)
Cash, cash equivalents and restricted cash, beginning of period	602,254	425,894
Cash, cash equivalents and restricted cash, end of period	717,526	691,363
Supplemental disclosures of cash flow information
Cash paid for amounts included in the measurement of operating lease liabilities	45,399
Cash paid for interest on long-term debt	4,330
Supplemental disclosures of non-cash activities
Right-of-use assets obtained in exchange for lease obligations	399,203
Capitalized leasehold improvements paid directly by landlord	$ 0	$ 34,487

XML

Summary of Significant Accounting Policies

9 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Description of Business

F5 Networks, Inc. (the "Company") is a leading provider of multi-cloud application services which enable its customers to develop, deploy, operate, secure, and govern applications in any architecture, from on-premises to the public cloud. The Company's cloud, software, and hardware solutions enable its customers to deliver digital experiences to their customers faster, reliably, and at scale. The Company's enterprise-grade application services are available as cloud-based, software-as-a-service, and software-only solutions optimized for multi-cloud environments, with modules that can run independently, or as part of an integrated solution on its high-performance appliances. In connection with its solutions, the Company offers a broad range of professional services, including consulting, training, installation, maintenance, and other technical support services. On January 24, 2020, the Company completed the acquisition of Shape Security, Inc. ("Shape"), a leader in online fraud and abuse prevention, adding protection from automated attacks, botnets, and targeted fraud to F5's world-class portfolio of application services.

Basis of Presentation

The year-end consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, necessary for their fair statement in conformity with accounting principles generally accepted in the United States of America. Certain information and footnote disclosures normally included in annual financial statements have been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC"). The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2019.

Certain prior year amounts have been reclassified to conform to the current year presentation in the Consolidated Statements of Cash Flows. The reclassified amounts are considered immaterial and there was no change to total cash from operating, investing or financing activities as a result.

There have been no material changes to the Company's significant accounting policies as of and for the three and nine months ended June 30, 2020, except for the accounting policy for leases that was updated as a result of adopting Accounting Standards Update 2016-02, Leases (Topic 842) (ASU 2016-02) and related standards. For more information, refer to the "Recently Adopted Accounting Standards" section of Note 1 and Note 8 - Leases.

In December 2019, a novel strain of coronavirus (“COVID-19“) was first identified, and in March 2020, the World Health Organization categorized COVID-19 as a pandemic. The Company assessed the impact that COVID-19 had on its results of operations, including, but not limited to an assessment of its allowance for doubtful accounts, the carrying value of short-term and long-term investments, the carrying value of goodwill and other long-lived assets, and the impact to revenue recognition and cost of revenues. The Company is actively monitoring the impact to the results of its business operations, and may make decisions required by federal, state or local authorities, or that are determined to be in the best interests of its employees, customers, partners, suppliers and stockholders. As of the filing date, the extent to which the COVID-19 pandemic may impact the Company’s financial condition or results of operations remains uncertain.

Recently Adopted Accounting Standards

In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02), which requires lessees to recognize on the balance sheet a right-of-use asset, representing its right to use the underlying asset for the lease term, and a corresponding lease liability for all leases with terms greater than twelve months. The Company's leases consist primarily of operating leases for its offices and lab spaces. The Company does not have finance leases. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing and uncertainty of cash flows arising from leases. The Company adopted this standard on October 1, 2019 on a modified retrospective basis by applying the new standard to its lease portfolio as of October 1, 2019, while continuing to apply legacy guidance in the comparative periods. The adoption of this standard had no impact on the consolidated income statements and consolidated statements of cash flows. Refer to Note 8 - Leases for further discussion.

Upon adoption of the standard, the Company elected the package of three expedients for existing and expired contracts to not reassess: the existence of additional leases, lease classification, or the treatment of initial direct costs. The Company also

applies the short-term lease exemption for leases with an original expected term of 12 months or less and expenses such leases month-to-month and does not record a right-of-use asset or lease liability. Short-term lease activity under the exception is not significant. Additionally, the Company does not separate lease and non-lease components in the allocation of minimum lease payments for its office space and equipment leases, as such separation is not significant.

The Company includes in minimum lease payments, fixed and variable payments based on a rate or index, but excludes variable payments based on satisfying future benchmarks or actual future costs incurred; such amounts are expensed as incurred. To calculate the net present value, the Company applied an incremental borrowing rate. This incremental borrowing rate is determined using a portfolio approach based on the rate of interest the Company would pay to borrow an amount equal to the lease payments on a collateralized basis over a similar term. Renewal options to extend lease terms are excluded from the minimum lease term at lease commencement.

Recently Issued Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), which replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) (ASU 2018-15), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software, and hosting arrangements that include an internal use software license. The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

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Revenue from Contracts with Customers

9 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

Capitalized Contract Acquisition Costs

The table below shows significant movements in capitalized contract acquisition costs (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	59,446
Additional capitalized contract acquisition costs deferred	31,759
Amortization of capitalized contract acquisition costs	(24,768)
Balances, June 30, 2020	$	66,437

Amortization of capitalized contract acquisition costs was $7.8 million and $6.9 million for the three months ended June 30, 2020 and 2019, respectively, and $24.8 million and $21.3 million for the nine months ended June 30, 2020 and 2019, respectively, and is recorded in Sales and Marketing expense in the accompanying consolidated income statements. There was no impairment of any capitalized contract acquisition costs during any period presented.

Contract Balances

Timing may differ between the satisfaction of performance obligations and the invoicing and collection of amounts related to the Company's contracts with customers. The Company records assets for amounts related to performance obligations that are satisfied but not yet billed and/or collected, in addition to contracts that have started, but not yet been fully billed. These assets are recorded as contract assets rather than receivables when receipt of the consideration is conditional on something other than the passage of time. Liabilities are recorded for amounts that are collected in advance of the satisfaction of performance obligations. These liabilities are classified as current and non-current deferred revenue.

The table below shows significant movements in contract assets (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	132,492
Revenue recognized during period but not yet billed	22,213
Contract asset additions	80,243
Contract assets acquired through the purchase of Shape	6,045
Contract assets reclassified to accounts receivable	(62,523)
Balances, June 30, 2020	$	178,470

As of June 30, 2020, contract assets that are expected to be reclassified to receivables within the next 12 months are included in other current assets, with those expected to be transferred to receivables in more than 12 months included in other assets. There were no impairments of contract assets during the nine months ended June 30, 2020 and 2019.

The table below shows significant movements in the deferred revenue balances (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	1,198,116
Amounts billed but not recognized as revenues	740,050
Amounts acquired through the purchase of Shape	39,000
Revenues recognized related to the opening balance of deferred revenue	(702,114)
Balances, June 30, 2020	$	1,275,052

The Company's contract assets and liabilities are reported in a net position on a contract by contract basis at the end of each reporting period.

Remaining Performance Obligations

Remaining performance obligations represent the amount of the transaction price under contracts with customers that are attributable to performance obligations that are unsatisfied or partially satisfied at the reporting date. As of June 30, 2020, the total non-cancelable remaining performance obligations under the Company's contracts with customers was approximately $1.3 billion and the Company expects to recognize revenues on approximately 69.7% of these remaining performance obligations over the next 12 months, 18.9% in year two, and the remaining balance thereafter.

See Note 12, Segment Information, for disaggregated revenue by significant customer and geographic region.

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Fair Value Measurements

9 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

In accordance with the authoritative guidance on fair value measurements and disclosure under GAAP, the Company determines fair value using a fair value hierarchy that distinguishes between market participant assumptions developed based on market data obtained from sources independent of the reporting entity, and the reporting entity’s own assumptions about market participant assumptions developed based on the best information available in the circumstances and expands disclosure about fair value measurements.

Fair value is the price that would be received to sell 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 at the measurement date, essentially the exit price.

The levels of fair value hierarchy are:

Level 1: Quoted prices in active markets for identical assets and liabilities at the measurement date that the Company has the ability to access.

Level 2: Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data.

Level 3: Unobservable inputs for which there is little or no market data available. These inputs reflect management's assumptions of what market participants would use in pricing the asset or liability.

Level 1 investments are valued based on quoted market prices in active markets and include the Company's cash equivalent investments. Level 2 investments, which include investments that are valued based on quoted prices in markets that are not active, broker or dealer quotations, actual trade data, benchmark yields or alternative pricing sources with reasonable levels of price transparency, include the Company's certificates of deposit, corporate bonds and notes, municipal bonds and notes, U.S. government securities, U.S. government agency securities and international government securities. Fair values for the Company's level 2 investments are based on similar assets without applying significant judgments. In addition, all of the Company's level 2 investments have a sufficient level of trading volume to demonstrate that the fair values used are appropriate for these investments.

A financial instrument's level within the fair value hierarchy is based upon the lowest level of any input that is significant to the fair value measurement. However, the determination of what constitutes "observable" requires significant judgment by the Company. The Company considers observable data to be market data which is readily available, regularly distributed or updated, reliable and verifiable, not proprietary, and provided by independent sources that are actively involved in the relevant market.

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at June 30, 2020, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at June 30, 2020
Cash equivalents	$	60,488	$	8,258	$	—	$	68,746
Short-term investments
Available-for-sale securities — corporate bonds and notes	—		203,851		—		203,851
Available-for-sale securities — municipal bonds and notes	—		7,040		—		7,040
Available-for-sale securities — U.S. government securities	—		161,417		—		161,417
Available-for-sale securities — U.S. government agency securities	—		6,995		—		6,995
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		97,677		—		97,677
Available-for-sale securities — U.S. government securities	—		3,982		—		3,982
Available-for-sale securities — U.S. government agency securities	—		11,269		—		11,269
Total	$	60,488	$	500,489	$	—	$	560,977

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2019, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at September 30, 2019
Cash equivalents	$	140,238	$	153,404	$	—	$	293,642
Short-term investments
Available-for-sale securities — certificates of deposits	—		249		—		249
Available-for-sale securities — corporate bonds and notes	—		259,547		—		259,547
Available-for-sale securities — municipal bonds and notes	—		12,129		—		12,129
Available-for-sale securities — U.S. government securities	—		78,992		—		78,992
Available-for-sale securities — U.S. government agency securities	—		22,146		—		22,146
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		298,916		—		298,916
Available-for-sale securities — municipal bonds and notes	—		2,524		—		2,524
Available-for-sale securities — U.S. government securities	—		5,515		—		5,515
Available-for-sale securities — U.S. government agency securities	—		51,447		—		51,447
Total	$	140,238	$	884,869	$	—	$	1,025,107

The Company uses the fair value hierarchy for financial assets and liabilities. The fair value of the Company's borrowings under its Term Loan Facility approximate the carrying value based on the borrowing rates currently available to the Company for loans with similar terms using Level 2 inputs. The carrying amounts of other current financial assets and other current financial liabilities approximate fair value due to their short-term nature.

The Company's non-financial assets and liabilities, which include goodwill, intangible assets, and long-lived assets, are not required to be carried at fair value on a recurring basis. These non-financial assets and liabilities are measured at fair value on a non-recurring basis when there is an indicator of impairment, and they are recorded at fair value only when impairment is recognized. The Company reviews goodwill and intangible assets for impairment annually, during the second quarter of each fiscal year, or as circumstances indicate the possibility of impairment. The Company monitors the carrying value of long-lived assets for impairment whenever events or changes in circumstances indicate its carrying amount may not be recoverable. Included in the Company’s impairment considerations for non-financial assets and liabilities in the current quarter were the potential impacts of the COVID-19 pandemic. During the three and nine months ended June 30, 2020 and 2019, the Company did not recognize any impairment charges related to goodwill, intangible assets, or long-lived assets.

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Short-Term and Long-Term Investments

9 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Short-Term and Long-Term Investments

Short-Term and Long-Term Investments

Short-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	202,968	$	900	$	(17)	$	203,851
Municipal bonds and notes	7,018		22		—		7,040
U.S. government securities	161,414		38		(35)		161,417
U.S. government agency securities	6,987		10		(2)		6,995
	$	378,387	$	970	$	(54)	$	379,303

September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposits	$	249	$	—	$	—	$	249
Corporate bonds and notes	259,242		402		(97)		259,547
Municipal bonds and notes	12,128		6		(5)		12,129
U.S. government securities	78,988		18		(14)		78,992
U.S. government agency securities	22,138		9		(1)		22,146
	$	372,745	$	435	$	(117)	$	373,063

Long-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	96,645	$	1,112	$	(80)	$	97,677
U.S. government securities	3,984		—		(2)		3,982
U.S. government agency securities	11,250		23		(4)		11,269
	$	111,879	$	1,135	$	(86)	$	112,928

September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	298,888	$	469	$	(441)	$	298,916
Municipal bonds and notes	2,528		2		(6)		2,524
U.S. government securities	5,515		3		(3)		5,515
U.S. government agency securities	51,463		5		(21)		51,447
	$	358,394	$	479	$	(471)	$	358,402

Interest income from investments was $2.2 million and $5.8 million for the three months ended June 30, 2020 and 2019, respectively, and $11.1 million and $20.2 million for the nine months ended June 30, 2020 and 2019, respectively. Interest income is included in other income, net on the Company's consolidated income statements.

The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of June 30, 2020 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
June 30, 2020	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	71,355	$	(92)	$	5,005	$	(5)	$	76,360	$	(97)
U.S. government securities	152,646		(37)		—		—		152,646		(37)
U.S. government agency securities	9,789		(6)		—		—		9,789		(6)
Total	$	233,790	$	(135)	$	5,005	$	(5)	$	238,795	$	(140)

The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of September 30, 2019 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
September 30, 2019	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	237,747	$	(434)	$	109,613	$	(104)	$	347,360	$	(538)
Municipal bonds and notes	864		—		7,800		(11)		8,664		(11)
U.S. government securities	27,095		(12)		9,991		(5)		37,086		(17)
U.S. government agency securities	30,946		(22)		—		—		30,946		(22)
Total	$	296,652	$	(468)	$	127,404	$	(120)	$	424,056	$	(588)

The Company invests in securities that are rated investment grade. The Company reviews the individual securities in its portfolio to determine whether a decline in a security's fair value below the amortized cost basis is other-than-temporary. Gross unrealized losses were not deemed material as of June 30, 2020 and were primarily caused by global market disruptions resulting from the COVID-19 pandemic rather than credit risks associated with the respective issuers of the debt securities. The Company determined that as of June 30, 2020, there were no investments in its portfolio that were other-than-temporarily impaired as a result of the COVID-19 pandemic or other market conditions.

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Business Combinations

9 Months Ended

Jun. 30, 2020

Business Combinations [Abstract]

Business Combinations

Business Combinations

Fiscal Year 2020 Acquisition of Shape Security, Inc.

On December 19, 2019, the Company entered into a Merger Agreement (the "Merger Agreement") with Shape Security, Inc. ("Shape"), a provider of fraud and abuse prevention solutions. The transaction closed on January 24, 2020 with Shape becoming a wholly-owned subsidiary of F5.

Pursuant to the Merger Agreement, at the effective time of the acquisition, the capital stock of Shape and the vested outstanding and unexercised stock options in Shape were cancelled and converted to the right to receive approximately $1.0 billion in cash, subject to certain adjustments and conditions set forth in the Merger Agreement, and the unvested stock options and restricted stock units in Shape held by continuing employees of Shape were assumed by F5, on the terms and conditions set forth in the Merger Agreement. Included in cash consideration was $23.2 million of transaction costs paid by F5 on behalf of Shape. In addition, the Company incurred $15.3 million of transaction costs associated with the acquisition which was included in General and Administrative expenses in the first and second fiscal quarters of 2020.

Shape is a leader in online fraud and abuse prevention, adding protection from automated attacks, botnets, and targeted fraud to F5's world-class portfolio of application services. As a result of the acquisition, the Company acquired all the assets and assumed all the liabilities of Shape. The goodwill related to the Shape acquisition is comprised primarily of expected synergies from combining operations and the acquired intangible assets that do not qualify for separate recognition. Goodwill related to the Shape acquisition is not expected to be deductible for tax purposes. The results of operations of Shape have been included in the Company's consolidated financial statements from the date of acquisition.

The preliminary purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash, cash equivalents, and restricted cash	$	53,934
Fair value of tangible assets:
Accounts receivable	21,077
Deferred tax assets	24,619
Operating lease right-of-use assets	29,644
Other tangible assets	22,571
Identifiable intangible assets:
Developed technologies	120,000		7 years
Customer relationships	21,000		4 years
Trade name	9,500		5 years
Goodwill	799,611
Total assets acquired	$	1,101,956
Liabilities assumed
Deferred revenue	$	(39,000)
Operating lease liabilities	(30,773)
Other assumed liabilities	(18,571)
Total liabilities assumed	$	(88,344)
Net assets acquired	$	1,013,612

The initial allocation of the purchase price was based on preliminary valuations and assumptions and is subject to change within the measurement period. The Company expects to finalize the allocation of the purchase price as soon as practicable and no later than one year from the acquisition date.

The developed technology intangible asset will be amortized on a straight-line basis over its estimated useful life of seven years and included in cost of net product revenues. The trade names and customer relationships intangible assets will be amortized on a straight-line basis over their estimated useful lives of five years and four years, respectively, and included in sales and marketing expenses. The weighted average life of the amortizable intangible assets recognized from the Shape acquisition was 6.5 years as of January 24, 2020, the date the transaction closed. The estimated useful lives for the acquired intangible assets were based on the expected future cash flows associated with the respective asset.

Since the Shape acquisition was completed on January 24, 2020, the F5 and Shape teams have been executing a plan to integrate ongoing operations. The pro forma financial information, as well as the revenue and earnings generated by Shape, were not considered material to the Company's operations.

Fiscal Year 2019 Acquisition of Nginx, Inc.

On March 9, 2019, the Company entered into a Merger Agreement (the "Merger Agreement") with Nginx, Inc. ("NGINX"), a provider of open source web server software and application delivery solutions. The transaction closed on May 8, 2019 with NGINX becoming a wholly-owned subsidiary of F5.

Pursuant to the Merger Agreement, at the effective time of the acquisition, the capital stock of NGINX and the vested outstanding and unexercised stock options in NGINX were cancelled and converted to the right to receive approximately $643.2 million in cash, subject to certain adjustments and conditions set forth in the Merger Agreement, and the unvested stock options and restricted stock units in NGINX held by continuing employees of NGINX were assumed by F5, on the terms and conditions set forth in the Merger Agreement. Included in cash consideration was $19.0 million of transaction costs paid by F5 on behalf of NGINX. In addition, the Company incurred $1.0 million of transaction costs associated with the acquisition which was included in General and Administrative expenses for fiscal 2019.

NGINX is an open source leader in application delivery. The combined company will enable multi-cloud application services across all environments, providing the ease-of-use and flexibility developers require while also delivering the scale, security, reliability and enterprise readiness network operations teams demand. As a result of the acquisition, the Company

acquired all the assets and assumed all the liabilities of NGINX. The goodwill related to the NGINX acquisition is comprised primarily of expected synergies from combining operations and the acquired intangible assets that do not qualify for separate recognition. The results of operations of NGINX have been included in the Company's consolidated financial statements from the date of acquisition.

The purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash and cash equivalents	$	29,911
Fair value of tangible assets:
Other tangible assets	23,699
Identifiable intangible assets:
Developed technologies	62,500		7 years
Customer relationships	12,000		15 years
Trade name	14,500		7 years
Non-competition agreements	300		2 years
Goodwill	503,414
Total assets acquired	$	646,324
Liabilities assumed
Other assumed liabilities	$	(9,116)
Total liabilities assumed	$	(9,116)
Net assets acquired	$	637,208

The measurement period for the NGINX acquisition lapsed during the third quarter of fiscal 2020. The Company reduced the carrying amount of goodwill by $6.0 million to reflect an adjustment to consideration exchanged for the purchase of NGINX within the post-close measurement period. No other financial statement amounts were affected by this adjustment. The adjustment was not material to the current period or any of the previous period financial statements.

The developed technology intangible asset will be amortized on a straight-line basis over its estimated useful life of seven years and included in cost of net product revenues. The trade names and customer relationships intangible assets will be amortized on a straight-line basis over their estimated useful lives of seven years and fifteen years, respectively, and included in sales and marketing expenses. The weighted average life of the amortizable intangible assets recognized from the NGINX acquisition was 8.1 years as of May 8, 2019, the date the transaction closed. The estimated useful lives for the acquired intangible assets were based on the expected future cash flows associated with the respective asset. Tax deductible goodwill based on the Company's preliminary calculation is $490.3 million.

Since the NGINX acquisition was completed on May 8, 2019, the F5 and NGINX teams have been executing a plan to integrate ongoing operations.

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Balance Sheet Details

9 Months Ended

Jun. 30, 2020

Balance Sheet Details [Abstract]

Balance Sheet Details

Balance Sheet Details

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of the Company's cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company's consolidated statements of cash flows for the periods presented (in thousands):

	June 30, 2020		September 30, 2019
Cash and cash equivalents	$	714,268	$	599,219
Restricted cash included in other assets, net	3,258		3,035
Total cash, cash equivalents and restricted cash	$	717,526	$	602,254

Inventories

Inventories consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Finished goods	$	18,250	$	22,441
Raw materials	10,576		11,960
	$	28,826	$	34,401

Other Current Assets

Other current assets consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Contract assets	$	123,947	$	79,407
Prepaid expenses	50,914		49,051
Capitalized contract acquisition costs	28,111		28,228
Other	35,191		26,188
	$	238,163	$	182,874

Other Assets

Other assets, net consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Intangible assets	$	236,371	$	108,903
Contract assets	54,523		53,085
Capitalized contract acquisition costs	38,325		31,218
Other	13,837		10,575
	$	343,056	$	203,781

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Payroll and benefits	$	139,167	$	138,453
Operating lease liabilities, current	46,490		—
Income and other tax accruals	35,855		31,801
Other	79,526		65,615
	$	301,038	$	235,869

Other Long-term Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Income taxes payable	$	39,784	$	42,324
Deferred rent	—		66,103
Other	10,033		23,426
	$	49,817	$	131,853

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Debt Facilities

9 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Debt Facilities

Debt Facilities

Term Credit Agreement

In connection with the acquisition of Shape, on January 24, 2020, the Company entered into a Term Credit Agreement ("Term Credit Agreement") with certain institutional lenders that provides for a senior unsecured term loan facility in an aggregate principal amount of $400.0 million (the "Term Loan Facility"). The proceeds from the Term Loan Facility were primarily used to finance the acquisition of Shape and related expenses. In connection with the Term Loan Facility, the Company incurred $2.2 million in debt issuance costs, which are recorded as a reduction to the carrying value of the principal amount of the debt.

Borrowings under the Term Loan Facility bear interest at a rate equal to, at the Company's option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Term Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. Interest on the outstanding principal of borrowings is currently due quarterly in arrears. As of June 30, 2020, the margin for LIBOR-based loans was 1.125% and the margin for alternate base rate loans was 0.125%.

The Term Loan Facility matures on January 24, 2023 with quarterly installments (commencing with the first full fiscal quarter ended after January 24, 2020) equal to 1.25% of the original principal amount of the Term Loan Facility. The remaining outstanding principal of borrowings under the Term Loan Facility is due upon maturity on January 24, 2023. Borrowings under the Term Loan Facility may be voluntarily prepaid, in whole or in part, without penalty or premium. Borrowings repaid or prepaid under the Term Loan Facility may not be reborrowed.

 Among certain affirmative and negative covenants provided in the Term Credit Agreement, there is a financial covenant that requires the Company to maintain a leverage ratio, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. This covenant may result in a higher interest rate on its outstanding principal borrowings on the Term Loan Facility in future periods, depending on the Company's performance. As of June 30, 2020, the Company was in compliance with all covenants.

As of June 30, 2020, $395.0 million of principal amount under the Term Loan Facility was outstanding, excluding unamortized debt issuance costs of $1.9 million. The weighted average interest rate on the principal amount under the Term Loan Facility outstanding balance was 2.452% for the period ending June 30, 2020. The following table presents the scheduled principal maturities as of June 30, 2020 (in thousands):

Fiscal Years Ending September 30:	Amount
2020 (remainder)	$	—
2021	20,000
2022	20,000
2023	355,000
Total	$	395,000

Revolving Credit Agreement

On January 31, 2020, the Company entered into a Revolving Credit Agreement (the "Revolving Credit Agreement") that provides for a senior unsecured revolving credit facility in an aggregate principal amount of $350.0 million (the "Revolving Credit Facility"). The Company has the option to increase commitments under the Revolving Credit Facility from time to time, subject to certain conditions, by up to $150.0 million. Borrowings under the Revolving Credit Facility bear interest at a rate equal to, at the Company's option, (a) LIBOR, adjusted for customary statutory reserves, plus an applicable margin of 1.125% to 1.75% depending on the Company's leverage ratio, or (b) an alternate base rate determined in accordance with the Revolving Credit Agreement, plus an applicable margin of 0.125% to 0.750% depending on the Company's leverage ratio. The Revolving Credit Agreement also requires payment of a commitment fee calculated at a rate per annum of 0.125% to 0.300% depending on the Company's leverage ratio on the undrawn portion of the Revolving Credit Facility. Amounts incurred during the three months ended June 30, 2020 were not material.

The Revolving Credit Facility matures on January 31, 2025, upon which any remaining outstanding principal of borrowings under the Revolving Credit Facility is due. The Company has the option to request up to two extensions of the maturity date in each case for an additional period of one year. Among certain affirmative and negative covenants provided in the Revolving Credit Agreement, there is a financial covenant that requires the Company to maintain a leverage ratio, calculated as of the last day of each fiscal quarter, of consolidated total indebtedness to consolidated EBITDA. As of June 30, 2020, the Company was in compliance with all covenants. As of June 30, 2020, there were no outstanding borrowings under the Revolving Credit Facility, and the Company had available borrowing capacity of $350.0 million.

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Leases

9 Months Ended

Jun. 30, 2020

Leases [Abstract]

Leases

Leases

During the first quarter of fiscal 2020, the Company adopted ASU 2016-02, Leases (Topic 842) (the "Leasing Standard") using the transition method provided in ASU 2018-11, Leases (Topic 842): Targeted Improvements. The impact of adopting the Leasing Standard resulted in the recognition of right-of-use assets and lease liabilities of $304.8 million and $386.4 million, respectively, on October 1, 2019, the date of adoption.

The majority of the Company's operating lease payments relate to its corporate headquarters in Seattle, Washington, which includes approximately 515,000 square feet of office space. The lease commenced in April 2019 and expires in 2033 with an option for renewal. The Company has concluded that the renewal option is not yet likely to be exercised. The Company also leases additional office and lab space for product development and sales and support personnel in the United States and internationally. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.

The components of the Company's operating lease expenses for the three and nine months ended June 30, 2020 were as follows (in thousands):

	Three months ended June 30, 2020		Nine months ended June 30, 2020
Operating lease expense	$	13,431	$	37,724
Short-term lease expense	878		2,505
Variable lease expense	6,062		16,163
Total lease expense	$	20,371	$	56,392

Variable lease expense primarily consists of common area maintenance and parking expenses. The Company executed two sublease contracts that commenced during the first quarter of fiscal year 2020. Lease income payments commenced in the second fiscal quarter. The Company has three additional subleases through the Q2 2020 acquisition of Shape Security.

Supplemental balance sheet information related to the Company's operating leases was as follows (in thousands, except lease term and discount rate):

	June 30, 2020
Operating lease right-of-use assets, net	$	316,761
Operating lease liabilities, current1	46,490
Operating lease liabilities, long-term	345,577
Total operating lease liabilities	$	392,067
Weighted average remaining lease term (in years)	10.4
Weighted average discount rate	2.61		%

(1)Current portion of operating lease liabilities is included in accrued liabilities on the Company's consolidated balance sheet.

Maturities of lease liabilities as of June 30, 2020 were as follows (in thousands):

Fiscal Years Ending September 30:	Operating Lease Payments
2020 (remainder)	$	11,613
2021	59,308
2022	56,111
2023	43,060
2024	38,340
2025	32,132
Thereafter	215,954
Total lease payments	456,518
Less: imputed interest	(64,451)
Total lease liabilities	$	392,067

Operating lease liabilities above do not include sublease income. As of June 30, 2020, the Company expects to receive sublease income of approximately $11.4 million, which consists of $1.1 million to be received for the remainder of fiscal 2020 and $10.3 million to be received over the three fiscal years thereafter.

As of June 30, 2020, the Company had no significant operating leases that were executed but not yet commenced.

ASC 840 - Leases

As a result of adopting the Leasing Standard, reporting periods beginning in the first quarter of fiscal 2020 are presented under the new standard while prior period amounts are not adjusted and continue to be reported in accordance with ASC 840 - Leases.

Prior to the adoption of the Leasing Standard, future minimum operating lease payments, net of sublease income, were as follows as of September 30, 2019 (in thousands):

Fiscal Year	Gross Lease Payments		Sublease Income		Net Lease Payments
2020	$	54,046	$	683	$	53,363
2021	50,712		1,051		49,661
2022	47,550		1,082		46,468
2023	36,514		368		36,146
2024	33,971		—		33,971
Thereafter	242,826		—		242,826
	$	465,619	$	3,184	$	462,435

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Commitments and Contingencies

9 Months Ended

Jun. 30, 2020

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Guarantees and Product Warranties

In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, resellers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company has entered into indemnification agreements with its officers and directors and certain other employees, and the Company's bylaws contain similar indemnification obligations to the Company's agents. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement.

The Company generally offers warranties of one year for hardware for those customers without service contracts, with the option of purchasing additional warranty coverage in yearly increments. The Company accrues for warranty costs as part of its cost of sales based on associated material product costs and technical support labor costs. Accrued warranty costs as of June 30, 2020 and September 30, 2019 were not material.

Commitments

As of June 30, 2020, the Company's principal commitments consisted of borrowings under the Term Loan Facility and obligations outstanding under operating leases. Refer to Note 7 for the scheduled principal maturities of the Term Loan Facility as of June 30, 2020.

The Company leases its facilities under operating leases that expire at various dates through 2033. There have been no material changes in the Company's lease obligations compared to those discussed in Note 11 to its annual consolidated financial statements.

The Company currently has arrangements with contract manufacturers and other suppliers for the manufacturing of its products. The arrangement with the primary contract manufacturer allows them to procure component inventory on the Company's behalf based on a rolling production forecast provided by the Company. The Company is obligated to the purchase of component inventory that the contract manufacturer procures in accordance with the forecast, unless it gives notice of order cancellation in advance of applicable lead times. There have been no material changes in the Company's inventory purchase obligations compared to those discussed in Note 11 to its annual consolidated financial statements.

Legal Proceedings

On June 8, 2020, Lynwood Investment CY Limited (“Lynwood”) filed a lawsuit in the United States District Court for the Northern District of California against the Company along with several other named defendants, including NGINX, Inc. (BVI), NGINX Software, Inc., NGINX, Inc. (DE), and BV NGINX, LLC. In its complaint, Lynwood claims to be the assignee of all rights and interests of Rambler Internet Holding LLC (“Rambler”), and alleges that the intellectual property in the NGINX software originally released by the co-founder of NGINX in 2004 belongs to Rambler (and therefore Lynwood, by assignment) because the software was created and developed while the co-founder was employed by Rambler. Lynwood asserts various causes of action, including copyright infringement, violation of trademark law, tortious interference, and fraud. The complaint seeks damages, disgorgement of profits, fees and costs, declarations of copyright and trademark ownership, trademark cancellations, and injunctive relief.

In addition to the above matter, the Company is subject to a variety of legal proceedings, claims, investigations, and litigation arising in the ordinary course of business, including intellectual property litigation. Management believes that the Company has meritorious defenses to the allegations made in its pending cases and intends to vigorously defend these lawsuits; however, the Company is unable currently to determine the ultimate outcome of these or similar matters or the potential exposure to loss, if any. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause it to incur costly litigation and/or substantial settlement charges that could have a material adverse effect on the Company's business, financial condition, results of operations, and cash flows.

The Company records an accrual for loss contingencies for legal proceedings when it believes that an unfavorable outcome is both (a) probable and (b) the amount or range of any possible loss is reasonably estimable. The Company has not recorded any accrual for loss contingencies associated with such legal proceedings or the investigations discussed above.

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Income Taxes

9 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company's tax provision for interim periods is determined using an estimated annual effective tax rate, adjusted for discrete items in the related period.

The effective tax rate was 20.4% and 23.1% for the three and nine months ended June 30, 2020, respectively, compared to 20.1% and 21.3% for the three and nine months ended June 30, 2019, respectively. The increase in the effective tax rate for the three and nine months ended June 30, 2020 as compared to the three and nine months ended June 30, 2019 is primarily due to the tax impact from stock-based compensation and other non-deductible expenses related to the acquisition of Shape Security, Inc., partially offset by a change in unrecognized tax benefits.

At June 30, 2020, the Company had $41.1 million of unrecognized tax benefits that, if recognized, would affect the effective tax rate. It is anticipated that the Company’s existing liabilities for unrecognized tax benefits will change within the next twelve months due to audit settlements or the expiration of statutes of limitations. The Company does not expect these changes to be material to the consolidated financial statements. The Company recognizes interest and, if applicable, penalties for any uncertain tax positions as a component of income tax expense.

The Company and its subsidiaries are subject to U.S. federal income tax as well as the income tax of multiple state and foreign jurisdictions. The Company has concluded all U.S. federal income tax matters for fiscal years through September 30, 2016. Major jurisdictions where there are wholly owned subsidiaries of F5 Networks, Inc. which require income tax filings include the United Kingdom, Japan, Singapore, Australia, and Israel. The earliest periods open for review by local taxing authorities are fiscal years 2018 for the United Kingdom, 2014 for Japan, 2015 for Singapore, 2016 for Australia, and 2013 for Israel. The Company is currently under audit by various states for fiscal years 2015 through 2018 and by Israel for fiscal years 2013 to 2017. Within the next four fiscal quarters, the statute of limitations will begin to close on fiscal years 2015 and 2016 state income tax returns and fiscal years 2014 to 2018 foreign income tax returns.

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Net Income Per Share

9 Months Ended

Jun. 30, 2020

Net Income Per Share [Abstract]

Net Income Per Share

Net Income Per Share

Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common and dilutive common stock equivalent shares outstanding during the period. The Company's nonvested restricted units do not have nonforfeitable rights to dividends or dividend equivalents and are not considered participating securities that should be included in the computation of earnings per share under the two-class method.

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Numerator
Net income	$	69,872	$	85,905	$	229,778	$	332,897
Denominator
Weighted average shares outstanding — basic	60,978		59,981		60,831		59,963
Dilutive effect of common shares from stock options and restricted stock units	437		215		351		409
Weighted average shares outstanding — diluted	61,415		60,196		61,182		60,372
Basic net income per share	$	1.15	$	1.43	$	3.78	$	5.55
Diluted net income per share	$	1.14	$	1.43	$	3.76	$	5.51

Anti-dilutive stock-based awards excluded from the calculations of diluted earnings per share were immaterial for the three and nine months ended June 30, 2020 and 2019.

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Segment Information

9 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Segment Information

Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available and evaluated regularly by the chief operating decision-maker, or decision-making group, in deciding how to allocate resources and in assessing performance. Management has determined that the Company is organized as, and operates in, one reportable operating segment: the development, marketing and sale of application services that optimize the security, performance and availability of network applications, servers and storage systems.

Revenues by Geographic Location and Other Information

The Company does business in three main geographic regions: the Americas (primarily the United States); Europe, the Middle East, and Africa (EMEA); and the Asia Pacific region (APAC). The Company's chief operating decision-maker reviews financial information presented on a consolidated basis accompanied by information about revenues by geographic region. The Company's foreign offices conduct sales, marketing and support activities. Revenues are attributed by geographic location based on the location of the customer.

The following presents revenues by geographic region (in thousands):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Americas:
United States	$	309,645	$	273,273	$	887,336	$	820,061
Other	22,155		27,429		71,312		79,697
Total Americas	331,800		300,702		958,648		899,758
EMEA	141,249		132,806		445,186		418,339
Asia Pacific	110,203		129,886		332,172		333,962
	$	583,252	$	563,394	$	1,736,006	$	1,652,059

The following distributors of the Company's products accounted for more than 10% of total net revenue:

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Ingram Micro, Inc.	16.0	%	17.8	%	16.6	%	18.2	%
Westcon Group, Inc.	—		10.0	%	—		10.3	%
Arrow ECS	11.1	%	—		10.3	%	10.3	%
Tech Data	—		10.8	%	—		10.2	%

The Company tracks assets by physical location. Long-lived assets consist of property and equipment, net, and are shown below (in thousands):

	June 30, 2020		September 30, 2019
United States	$	195,261	$	194,176
EMEA	17,223		13,451
Other countries	15,809		15,799
	$	228,293	$	223,426

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Restructuring Charges

9 Months Ended

Jun. 30, 2020

Restructuring Charges [Abstract]

Restructuring Charges

Restructuring Charges

In December 2019, the Company initiated a restructuring plan to match strategic and financial objectives and optimize resources for long term growth, including a reduction in force program affecting approximately 75 employees. The Company recorded a restructuring charge of $7.8 million in the first quarter of fiscal 2020. The Company does not expect to record any significant future charges related to the restructuring plan.

During the nine months ended June 30, 2020, the following activity was recorded (in thousands):

	Employee Severance, Benefits and Related Costs
Accrued expenses, October 1, 2019	$	—
Restructuring charges	7,800
Cash payments	(7,613)
Non-cash items	—
Accrued expenses, June 30, 2020	$	187

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Jun. 30, 2020

Accounting Policies [Abstract]

Description of Business

Description of Business

F5 Networks, Inc. (the "Company") is a leading provider of multi-cloud application services which enable its customers to develop, deploy, operate, secure, and govern applications in any architecture, from on-premises to the public cloud. The Company's cloud, software, and hardware solutions enable its customers to deliver digital experiences to their customers faster, reliably, and at scale. The Company's enterprise-grade application services are available as cloud-based, software-as-a-service, and software-only solutions optimized for multi-cloud environments, with modules that can run independently, or as part of an integrated solution on its high-performance appliances. In connection with its solutions, the Company offers a broad range of professional services, including consulting, training, installation, maintenance, and other technical support services. On January 24, 2020, the Company completed the acquisition of Shape Security, Inc. ("Shape"), a leader in online fraud and abuse prevention, adding protection from automated attacks, botnets, and targeted fraud to F5's world-class portfolio of application services.

Basis of Presentation

Basis of Presentation

The year-end consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by accounting principles generally accepted in the United States of America ("GAAP"). In the opinion of management, the unaudited consolidated financial statements reflect all adjustments, consisting only of normal recurring adjustments, necessary for their fair statement in conformity with accounting principles generally accepted in the United States of America. Certain information and footnote disclosures normally included in annual financial statements have been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC"). The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2019.

Certain prior year amounts have been reclassified to conform to the current year presentation in the Consolidated Statements of Cash Flows. The reclassified amounts are considered immaterial and there was no change to total cash from operating, investing or financing activities as a result.

There have been no material changes to the Company's significant accounting policies as of and for the three and nine months ended June 30, 2020, except for the accounting policy for leases that was updated as a result of adopting Accounting Standards Update 2016-02, Leases (Topic 842) (ASU 2016-02) and related standards. For more information, refer to the "Recently Adopted Accounting Standards" section of Note 1 and Note 8 - Leases.

In December 2019, a novel strain of coronavirus (“COVID-19“) was first identified, and in March 2020, the World Health Organization categorized COVID-19 as a pandemic. The Company assessed the impact that COVID-19 had on its results of operations, including, but not limited to an assessment of its allowance for doubtful accounts, the carrying value of short-term and long-term investments, the carrying value of goodwill and other long-lived assets, and the impact to revenue recognition and cost of revenues. The Company is actively monitoring the impact to the results of its business operations, and may make decisions required by federal, state or local authorities, or that are determined to be in the best interests of its employees, customers, partners, suppliers and stockholders. As of the filing date, the extent to which the COVID-19 pandemic may impact the Company’s financial condition or results of operations remains uncertain.

Recent Accounting Pronouncements

Recently Adopted Accounting Standards

In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842) (ASU 2016-02), which requires lessees to recognize on the balance sheet a right-of-use asset, representing its right to use the underlying asset for the lease term, and a corresponding lease liability for all leases with terms greater than twelve months. The Company's leases consist primarily of operating leases for its offices and lab spaces. The Company does not have finance leases. The guidance also requires qualitative and quantitative disclosures designed to assess the amount, timing and uncertainty of cash flows arising from leases. The Company adopted this standard on October 1, 2019 on a modified retrospective basis by applying the new standard to its lease portfolio as of October 1, 2019, while continuing to apply legacy guidance in the comparative periods. The adoption of this standard had no impact on the consolidated income statements and consolidated statements of cash flows. Refer to Note 8 - Leases for further discussion.

Upon adoption of the standard, the Company elected the package of three expedients for existing and expired contracts to not reassess: the existence of additional leases, lease classification, or the treatment of initial direct costs. The Company also

applies the short-term lease exemption for leases with an original expected term of 12 months or less and expenses such leases month-to-month and does not record a right-of-use asset or lease liability. Short-term lease activity under the exception is not significant. Additionally, the Company does not separate lease and non-lease components in the allocation of minimum lease payments for its office space and equipment leases, as such separation is not significant.

The Company includes in minimum lease payments, fixed and variable payments based on a rate or index, but excludes variable payments based on satisfying future benchmarks or actual future costs incurred; such amounts are expensed as incurred. To calculate the net present value, the Company applied an incremental borrowing rate. This incremental borrowing rate is determined using a portfolio approach based on the rate of interest the Company would pay to borrow an amount equal to the lease payments on a collateralized basis over a similar term. Renewal options to extend lease terms are excluded from the minimum lease term at lease commencement.

Recently Issued Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13), which replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) (ASU 2018-15), which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software, and hosting arrangements that include an internal use software license. The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this update. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company does not anticipate that the adoption of this standard will have a material impact on its consolidated financial statements.

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Revenue from Contracts with Customers (Tables)

9 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Capitalized Contract Cost

The table below shows significant movements in capitalized contract acquisition costs (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	59,446
Additional capitalized contract acquisition costs deferred	31,759
Amortization of capitalized contract acquisition costs	(24,768)
Balances, June 30, 2020	$	66,437

Contract with Customer, Asset and Liability

The table below shows significant movements in contract assets (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	132,492
Revenue recognized during period but not yet billed	22,213
Contract asset additions	80,243
Contract assets acquired through the purchase of Shape	6,045
Contract assets reclassified to accounts receivable	(62,523)
Balances, June 30, 2020	$	178,470

The table below shows significant movements in the deferred revenue balances (current and noncurrent) for the nine months ended June 30, 2020 (in thousands):

Balances, September 30, 2019	$	1,198,116
Amounts billed but not recognized as revenues	740,050
Amounts acquired through the purchase of Shape	39,000
Revenues recognized related to the opening balance of deferred revenue	(702,114)
Balances, June 30, 2020	$	1,275,052

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Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2020

Fair Value Disclosures [Abstract]

Schedule of Financial Assets Measured at Fair Value on a Recurring Basis

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at June 30, 2020, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at June 30, 2020
Cash equivalents	$	60,488	$	8,258	$	—	$	68,746
Short-term investments
Available-for-sale securities — corporate bonds and notes	—		203,851		—		203,851
Available-for-sale securities — municipal bonds and notes	—		7,040		—		7,040
Available-for-sale securities — U.S. government securities	—		161,417		—		161,417
Available-for-sale securities — U.S. government agency securities	—		6,995		—		6,995
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		97,677		—		97,677
Available-for-sale securities — U.S. government securities	—		3,982		—		3,982
Available-for-sale securities — U.S. government agency securities	—		11,269		—		11,269
Total	$	60,488	$	500,489	$	—	$	560,977

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2019, were as follows (in thousands):

	Fair Value Measurements at Reporting Date Using
	Quoted Prices in Active Markets for Identical Securities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value at September 30, 2019
Cash equivalents	$	140,238	$	153,404	$	—	$	293,642
Short-term investments
Available-for-sale securities — certificates of deposits	—		249		—		249
Available-for-sale securities — corporate bonds and notes	—		259,547		—		259,547
Available-for-sale securities — municipal bonds and notes	—		12,129		—		12,129
Available-for-sale securities — U.S. government securities	—		78,992		—		78,992
Available-for-sale securities — U.S. government agency securities	—		22,146		—		22,146
Long-term investments
Available-for-sale securities — corporate bonds and notes	—		298,916		—		298,916
Available-for-sale securities — municipal bonds and notes	—		2,524		—		2,524
Available-for-sale securities — U.S. government securities	—		5,515		—		5,515
Available-for-sale securities — U.S. government agency securities	—		51,447		—		51,447
Total	$	140,238	$	884,869	$	—	$	1,025,107

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Short-Term and Long-Term Investments (Tables)

9 Months Ended

Jun. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Short-Term and Long-Term Investments

Short-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	202,968	$	900	$	(17)	$	203,851
Municipal bonds and notes	7,018		22		—		7,040
U.S. government securities	161,414		38		(35)		161,417
U.S. government agency securities	6,987		10		(2)		6,995
	$	378,387	$	970	$	(54)	$	379,303

September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposits	$	249	$	—	$	—	$	249
Corporate bonds and notes	259,242		402		(97)		259,547
Municipal bonds and notes	12,128		6		(5)		12,129
U.S. government securities	78,988		18		(14)		78,992
U.S. government agency securities	22,138		9		(1)		22,146
	$	372,745	$	435	$	(117)	$	373,063

Long-term investments consist of the following (in thousands):

June 30, 2020	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	96,645	$	1,112	$	(80)	$	97,677
U.S. government securities	3,984		—		(2)		3,982
U.S. government agency securities	11,250		23		(4)		11,269
	$	111,879	$	1,135	$	(86)	$	112,928

September 30, 2019	Cost or Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Corporate bonds and notes	$	298,888	$	469	$	(441)	$	298,916
Municipal bonds and notes	2,528		2		(6)		2,524
U.S. government securities	5,515		3		(3)		5,515
U.S. government agency securities	51,463		5		(21)		51,447
	$	358,394	$	479	$	(471)	$	358,402

Schedule of Investments That Have Been in a Continuous Unrealized Loss Position

The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of June 30, 2020 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
June 30, 2020	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	71,355	$	(92)	$	5,005	$	(5)	$	76,360	$	(97)
U.S. government securities	152,646		(37)		—		—		152,646		(37)
U.S. government agency securities	9,789		(6)		—		—		9,789		(6)
Total	$	233,790	$	(135)	$	5,005	$	(5)	$	238,795	$	(140)

The following table summarizes investments that have been in a continuous unrealized loss position for less than 12 months and those that have been in a continuous unrealized loss position for more than 12 months as of September 30, 2019 (in thousands):

	Less Than 12 Months				12 Months or Greater				Total
September 30, 2019	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Corporate bonds and notes	$	237,747	$	(434)	$	109,613	$	(104)	$	347,360	$	(538)
Municipal bonds and notes	864		—		7,800		(11)		8,664		(11)
U.S. government securities	27,095		(12)		9,991		(5)		37,086		(17)
U.S. government agency securities	30,946		(22)		—		—		30,946		(22)
Total	$	296,652	$	(468)	$	127,404	$	(120)	$	424,056	$	(588)

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Business Combinations (Tables)

9 Months Ended

Jun. 30, 2020

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The preliminary purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash, cash equivalents, and restricted cash	$	53,934
Fair value of tangible assets:
Accounts receivable	21,077
Deferred tax assets	24,619
Operating lease right-of-use assets	29,644
Other tangible assets	22,571
Identifiable intangible assets:
Developed technologies	120,000		7 years
Customer relationships	21,000		4 years
Trade name	9,500		5 years
Goodwill	799,611
Total assets acquired	$	1,101,956
Liabilities assumed
Deferred revenue	$	(39,000)
Operating lease liabilities	(30,773)
Other assumed liabilities	(18,571)
Total liabilities assumed	$	(88,344)
Net assets acquired	$	1,013,612

The purchase price allocation is as follows (in thousands):

			Estimated
			Useful Life
Assets acquired
Cash and cash equivalents	$	29,911
Fair value of tangible assets:
Other tangible assets	23,699
Identifiable intangible assets:
Developed technologies	62,500		7 years
Customer relationships	12,000		15 years
Trade name	14,500		7 years
Non-competition agreements	300		2 years
Goodwill	503,414
Total assets acquired	$	646,324
Liabilities assumed
Other assumed liabilities	$	(9,116)
Total liabilities assumed	$	(9,116)
Net assets acquired	$	637,208

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Balance Sheet Details (Tables)

9 Months Ended

Jun. 30, 2020

Balance Sheet Details [Abstract]

Cash and Cash Equivalents

The following table provides a reconciliation of the Company's cash and cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total cash, cash equivalents and restricted cash shown in the Company's consolidated statements of cash flows for the periods presented (in thousands):

	June 30, 2020		September 30, 2019
Cash and cash equivalents	$	714,268	$	599,219
Restricted cash included in other assets, net	3,258		3,035
Total cash, cash equivalents and restricted cash	$	717,526	$	602,254

Inventories

Inventories consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Finished goods	$	18,250	$	22,441
Raw materials	10,576		11,960
	$	28,826	$	34,401

Other Current Assets

Other current assets consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Contract assets	$	123,947	$	79,407
Prepaid expenses	50,914		49,051
Capitalized contract acquisition costs	28,111		28,228
Other	35,191		26,188
	$	238,163	$	182,874

Other Assets, Noncurrent

Other assets, net consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Intangible assets	$	236,371	$	108,903
Contract assets	54,523		53,085
Capitalized contract acquisition costs	38,325		31,218
Other	13,837		10,575
	$	343,056	$	203,781

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Payroll and benefits	$	139,167	$	138,453
Operating lease liabilities, current	46,490		—
Income and other tax accruals	35,855		31,801
Other	79,526		65,615
	$	301,038	$	235,869

Noncurrent Liabilities

Other long-term liabilities consist of the following (in thousands):

	June 30, 2020		September 30, 2019
Income taxes payable	$	39,784	$	42,324
Deferred rent	—		66,103
Other	10,033		23,426
	$	49,817	$	131,853

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Debt Facilities (Tables)

9 Months Ended

Jun. 30, 2020

Debt Disclosure [Abstract]

Schedule of Maturities of Long-term Debt

The following table presents the scheduled principal maturities as of June 30, 2020 (in thousands):

Fiscal Years Ending September 30:	Amount
2020 (remainder)	$	—
2021	20,000
2022	20,000
2023	355,000
Total	$	395,000

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Leases (Tables)

9 Months Ended

Jun. 30, 2020

Leases [Abstract]

Lease, Cost

The components of the Company's operating lease expenses for the three and nine months ended June 30, 2020 were as follows (in thousands):

	Three months ended June 30, 2020		Nine months ended June 30, 2020
Operating lease expense	$	13,431	$	37,724
Short-term lease expense	878		2,505
Variable lease expense	6,062		16,163
Total lease expense	$	20,371	$	56,392

Assets And Liabilities Lessee

Supplemental balance sheet information related to the Company's operating leases was as follows (in thousands, except lease term and discount rate):

	June 30, 2020
Operating lease right-of-use assets, net	$	316,761
Operating lease liabilities, current1	46,490
Operating lease liabilities, long-term	345,577
Total operating lease liabilities	$	392,067
Weighted average remaining lease term (in years)	10.4
Weighted average discount rate	2.61		%

(1)Current portion of operating lease liabilities is included in accrued liabilities on the Company's consolidated balance sheet.

Lessee, Operating Lease, Liability, Maturity

Maturities of lease liabilities as of June 30, 2020 were as follows (in thousands):

Fiscal Years Ending September 30:	Operating Lease Payments
2020 (remainder)	$	11,613
2021	59,308
2022	56,111
2023	43,060
2024	38,340
2025	32,132
Thereafter	215,954
Total lease payments	456,518
Less: imputed interest	(64,451)
Total lease liabilities	$	392,067

Future Minimum Rental Payments for Operating Leases

Prior to the adoption of the Leasing Standard, future minimum operating lease payments, net of sublease income, were as follows as of September 30, 2019 (in thousands):

Fiscal Year	Gross Lease Payments		Sublease Income		Net Lease Payments
2020	$	54,046	$	683	$	53,363
2021	50,712		1,051		49,661
2022	47,550		1,082		46,468
2023	36,514		368		36,146
2024	33,971		—		33,971
Thereafter	242,826		—		242,826
	$	465,619	$	3,184	$	462,435

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Net Income Per Share (Tables)

9 Months Ended

Jun. 30, 2020

Net Income Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Numerator
Net income	$	69,872	$	85,905	$	229,778	$	332,897
Denominator
Weighted average shares outstanding — basic	60,978		59,981		60,831		59,963
Dilutive effect of common shares from stock options and restricted stock units	437		215		351		409
Weighted average shares outstanding — diluted	61,415		60,196		61,182		60,372
Basic net income per share	$	1.15	$	1.43	$	3.78	$	5.55
Diluted net income per share	$	1.14	$	1.43	$	3.76	$	5.51

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Segment Information (Tables)

9 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule of Revenues by Geographic Region

The following presents revenues by geographic region (in thousands):

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Americas:
United States	$	309,645	$	273,273	$	887,336	$	820,061
Other	22,155		27,429		71,312		79,697
Total Americas	331,800		300,702		958,648		899,758
EMEA	141,249		132,806		445,186		418,339
Asia Pacific	110,203		129,886		332,172		333,962
	$	583,252	$	563,394	$	1,736,006	$	1,652,059

Schedule of Revenue by Major Customers by Reporting Segments

The following distributors of the Company's products accounted for more than 10% of total net revenue:

	Three months ended June 30,				Nine months ended June 30,
	2020		2019		2020		2019
Ingram Micro, Inc.	16.0	%	17.8	%	16.6	%	18.2	%
Westcon Group, Inc.	—		10.0	%	—		10.3	%
Arrow ECS	11.1	%	—		10.3	%	10.3	%
Tech Data	—		10.8	%	—		10.2	%

Long-lived Assets by Geographic Areas

The Company tracks assets by physical location. Long-lived assets consist of property and equipment, net, and are shown below (in thousands):

	June 30, 2020		September 30, 2019
United States	$	195,261	$	194,176
EMEA	17,223		13,451
Other countries	15,809		15,799
	$	228,293	$	223,426

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Restructuring Charges (Tables)

9 Months Ended

Jun. 30, 2020

Restructuring Charges [Abstract]

Restructuring and Related Costs

During the nine months ended June 30, 2020, the following activity was recorded (in thousands):

	Employee Severance, Benefits and Related Costs
Accrued expenses, October 1, 2019	$	—
Restructuring charges	7,800
Cash payments	(7,613)
Non-cash items	—
Accrued expenses, June 30, 2020	$	187

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Revenue from Contracts with Customers - Capitalized contract acquisition costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Changes In Capitalized Contract Cost [Roll Forward]
Beginning Balance			$ 59,446
Additional capitalized contract acquisition costs deferred			31,759
Amortization of capitalized contract acquisition costs	$ (7,800)	$ (6,900)	(24,768)	$ (21,300)
Ending Balance	$ 66,437		$ 66,437

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Revenue from Contracts with Customers - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Amortization of capitalized contract acquisition costs	$ 7,800,000	$ 6,900,000	$ 24,768,000	$ 21,300,000
Capitalized Contract Cost, Impairment Loss	$ 0	$ 0	$ 0	$ 0

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Revenue from Contracts with Customers - Contract Assets and Liabilities (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2020 USD ($)
Change in Contract with Customer, Asset [Roll Forward]
Beginning Balance	$ 132,492
Revenue recognized during period but not yet billed	22,213
Contract asset additions	80,243
Contract assets acquired through the purchase of Shape	6,045
Contract assets reclassified to accounts receivable	(62,523)
Ending Balance	178,470
Change in Contract with Customer, Liability [Roll Forward]
Beginning Balance	1,198,116
Amounts billed but not recognized as revenues	740,050
Amounts acquired through the purchase of Shape	39,000
Revenues recognized related to the opening balance of deferred revenue	(702,114)
Ending Balance	$ 1,275,052

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Revenue from Contracts with Customers - Remaining Performance Obligations (Details) $ in Billions	Jun. 30, 2020 USD ($)
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, amount	$ 1.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, percentage	69.70%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue from Contract with Customer [Abstract]
Revenue, remaining performance obligation, percentage	18.90%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months

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Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Cash equivalents, fair value	$ 68,746	$ 293,642
Investments, fair value	560,977	1,025,107
Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current		249
Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	203,851	259,547
Debt Securities, Available-for-sale, Noncurrent	97,677	298,916
Municipal Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	7,040	12,129
Debt Securities, Available-for-sale, Noncurrent		2,524
U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	161,417	78,992
Debt Securities, Available-for-sale, Noncurrent	3,982	5,515
U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	6,995	22,146
Debt Securities, Available-for-sale, Noncurrent	11,269	51,447
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Cash equivalents, fair value	60,488	140,238
Investments, fair value	60,488	140,238
Level 1 | Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current		0
Level 1 | Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	0	0
Level 1 | Municipal Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent		0
Level 1 | U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	0	0
Level 1 | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Cash equivalents, fair value	8,258	153,404
Investments, fair value	500,489	884,869
Level 2 | Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current		249
Level 2 | Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	203,851	259,547
Debt Securities, Available-for-sale, Noncurrent	97,677	298,916
Level 2 | Municipal Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	7,040	12,129
Debt Securities, Available-for-sale, Noncurrent		2,524
Level 2 | U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	161,417	78,992
Debt Securities, Available-for-sale, Noncurrent	3,982	5,515
Level 2 | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	6,995	22,146
Debt Securities, Available-for-sale, Noncurrent	11,269	51,447
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Cash equivalents, fair value	0	0
Investments, fair value	0	0
Level 3 | Certificates of Deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current		0
Level 3 | Corporate Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	0	0
Level 3 | Municipal Bonds and Notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent		0
Level 3 | U.S. Government Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	0	0
Level 3 | U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Current	0	0
Debt Securities, Available-for-sale, Noncurrent	$ 0	$ 0

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Short-Term and Long-Term Investments - Schedule of Short-Term and Long-Term Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019
Schedule of Investments [Line Items]
Interest income from investments	$ 2,200	$ 5,800	$ 11,100	$ 20,200
Short-Term Investments
Schedule of Investments [Line Items]
Cost or amortized cost	378,387		378,387		$ 372,745
Gross unrealized gains	970		970		435
Gross unrealized losses	(54)		(54)		(117)
Fair value	379,303		379,303		373,063
Short-Term Investments | Certificates of Deposit
Schedule of Investments [Line Items]
Cost or amortized cost					249
Gross unrealized gains					0
Gross unrealized losses					0
Fair value					249
Short-Term Investments | Corporate Bonds and Notes
Schedule of Investments [Line Items]
Cost or amortized cost	202,968		202,968		259,242
Gross unrealized gains	900		900		402
Gross unrealized losses	(17)		(17)		(97)
Fair value	203,851		203,851		259,547
Short-Term Investments | Municipal Bonds and Notes
Schedule of Investments [Line Items]
Cost or amortized cost	7,018		7,018		12,128
Gross unrealized gains	22		22		6
Gross unrealized losses	0		0		(5)
Fair value	7,040		7,040		12,129
Short-Term Investments | U.S. Government Securities
Schedule of Investments [Line Items]
Cost or amortized cost	161,414		161,414		78,988
Gross unrealized gains	38		38		18
Gross unrealized losses	(35)		(35)		(14)
Fair value	161,417		161,417		78,992
Short-Term Investments | U.S. Government Agency Securities
Schedule of Investments [Line Items]
Cost or amortized cost	6,987		6,987		22,138
Gross unrealized gains	10		10		9
Gross unrealized losses	(2)		(2)		(1)
Fair value	6,995		6,995		22,146
Long-Term Investments
Schedule of Investments [Line Items]
Cost or amortized cost	111,879		111,879		358,394
Gross unrealized gains	1,135		1,135		479
Gross unrealized losses	(86)		(86)		(471)
Fair value	112,928		112,928		358,402
Long-Term Investments | Corporate Bonds and Notes
Schedule of Investments [Line Items]
Cost or amortized cost	96,645		96,645		298,888
Gross unrealized gains	1,112		1,112		469
Gross unrealized losses	(80)		(80)		(441)
Fair value	97,677		97,677		298,916
Long-Term Investments | Municipal Bonds and Notes
Schedule of Investments [Line Items]
Cost or amortized cost					2,528
Gross unrealized gains					2
Gross unrealized losses					(6)
Fair value					2,524
Long-Term Investments | U.S. Government Securities
Schedule of Investments [Line Items]
Cost or amortized cost	3,984		3,984		5,515
Gross unrealized gains	0		0		3
Gross unrealized losses	(2)		(2)		(3)
Fair value	3,982		3,982		5,515
Long-Term Investments | U.S. Government Agency Securities
Schedule of Investments [Line Items]
Cost or amortized cost	11,250		11,250		51,463
Gross unrealized gains	23		23		5
Gross unrealized losses	(4)		(4)		(21)
Fair value	$ 11,269		$ 11,269		$ 51,447

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Short-Term and Long-Term Investments - Schedule of Investments That Have Been in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Fair Value
Less than 12 months	$ 233,790	$ 296,652
12 months or greater	5,005	127,404
Total	238,795	424,056
Gross Unrealized Losses
Less than 12 months	(135)	(468)
12 months or greater	(5)	(120)
Total	(140)	(588)
Corporate Bonds and Notes
Fair Value
Less than 12 months	71,355	237,747
12 months or greater	5,005	109,613
Total	76,360	347,360
Gross Unrealized Losses
Less than 12 months	(92)	(434)
12 months or greater	(5)	(104)
Total	(97)	(538)
Municipal Bonds and Notes
Fair Value
Less than 12 months		864
12 months or greater		7,800
Total		8,664
Gross Unrealized Losses
Less than 12 months		0
12 months or greater		(11)
Total		(11)
U.S. Government Securities
Fair Value
Less than 12 months	152,646	27,095
12 months or greater	0	9,991
Total	152,646	37,086
Gross Unrealized Losses
Less than 12 months	(37)	(12)
12 months or greater	0	(5)
Total	(37)	(17)
U.S. Government Agency Securities
Fair Value
Less than 12 months	9,789	30,946
12 months or greater	0	0
Total	9,789	30,946
Gross Unrealized Losses
Less than 12 months	(6)	(22)
12 months or greater	0	0
Total	$ (6)	$ (22)

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Business Combinations - Narrative (Details) - USD ($) $ in Millions			3 Months Ended	9 Months Ended
	Jan. 24, 2020	May 08, 2019	Jun. 30, 2020	Jun. 30, 2020
Shape Security, Inc.
Business Acquisition [Line Items]
Total purchase price	$ 1,000.0
Transaction costs	$ 23.2
Identifiable intangible assets useful life	6 years 6 months
Shape Security, Inc. | General and Administrative Expense
Business Acquisition [Line Items]
Business combination, acquisition related costs				$ 15.3
F5 Networks Acquisition of Nginx
Business Acquisition [Line Items]
Total purchase price		$ 643.2
Transaction costs		$ 19.0
Identifiable intangible assets useful life		8 years 1 month 6 days
Goodwill, Other Increase (Decrease)			$ 6.0
Tax deductible goodwill		$ 490.3
F5 Networks Acquisition of Nginx | General and Administrative Expense
Business Acquisition [Line Items]
Transaction costs		$ 1.0
Developed Technology Rights | Shape Security, Inc.
Business Acquisition [Line Items]
Identifiable intangible assets useful life	7 years
Developed Technology Rights | F5 Networks Acquisition of Nginx
Business Acquisition [Line Items]
Identifiable intangible assets useful life		7 years
Customer Relationships | Shape Security, Inc.
Business Acquisition [Line Items]
Identifiable intangible assets useful life	4 years
Customer Relationships | F5 Networks Acquisition of Nginx
Business Acquisition [Line Items]
Identifiable intangible assets useful life		15 years
Trade Names | Shape Security, Inc.
Business Acquisition [Line Items]
Identifiable intangible assets useful life	5 years
Trade Names | F5 Networks Acquisition of Nginx
Business Acquisition [Line Items]
Identifiable intangible assets useful life		7 years

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Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jan. 24, 2020	May 08, 2019	Jun. 30, 2020	Sep. 30, 2019
Fair value of tangible assets:
Goodwill			$ 1,858,966	$ 1,065,379
Shape Security, Inc.
Assets acquired
Cash and cash equivalents	$ 53,934
Fair value of tangible assets:
Accounts receivable	21,077
Deferred tax assets	24,619
Operating lease right-of-use assets	29,644
Other tangible assets	$ 22,571
Identifiable intangible assets useful life	6 years 6 months
Goodwill	$ 799,611
Total assets acquired	1,101,956
Liabilities assumed
Deferred revenue	(39,000)
Operating lease liabilities	(30,773)
Other assumed liabilities	(18,571)
Total liabilities assumed	(88,344)
Net assets acquired	1,013,612
Shape Security, Inc. | Developed Technology Rights
Fair value of tangible assets:
Identifiable intangible assets:	$ 120,000
Identifiable intangible assets useful life	7 years
Shape Security, Inc. | Customer Relationships
Fair value of tangible assets:
Identifiable intangible assets:	$ 21,000
Identifiable intangible assets useful life	4 years
Shape Security, Inc. | Trade Names
Fair value of tangible assets:
Identifiable intangible assets:	$ 9,500
Identifiable intangible assets useful life	5 years
F5 Networks Acquisition of Nginx
Assets acquired
Cash and cash equivalents		$ 29,911
Fair value of tangible assets:
Other tangible assets		$ 23,699
Identifiable intangible assets useful life		8 years 1 month 6 days
Goodwill		$ 503,414
Total assets acquired		646,324
Liabilities assumed
Other assumed liabilities		(9,116)
Total liabilities assumed		(9,116)
Net assets acquired		637,208
F5 Networks Acquisition of Nginx | Developed Technology Rights
Fair value of tangible assets:
Identifiable intangible assets:		$ 62,500
Identifiable intangible assets useful life		7 years
F5 Networks Acquisition of Nginx | Customer Relationships
Fair value of tangible assets:
Identifiable intangible assets:		$ 12,000
Identifiable intangible assets useful life		15 years
F5 Networks Acquisition of Nginx | Trade Names
Fair value of tangible assets:
Identifiable intangible assets:		$ 14,500
Identifiable intangible assets useful life		7 years
F5 Networks Acquisition of Nginx | Non-competition Agreements
Fair value of tangible assets:
Identifiable intangible assets:		$ 300
Identifiable intangible assets useful life		2 years

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Balance Sheet Details - Cash and Cash Equivalent (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2018
Balance Sheet Details [Abstract]
Cash and cash equivalents	$ 714,268	$ 599,219
Restricted cash included in other assets, net	3,258	3,035
Total cash, cash equivalents and restricted cash	$ 717,526	$ 602,254	$ 691,363	$ 425,894

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Balance Sheet Details - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Balance Sheet Details [Abstract]
Finished goods	$ 18,250	$ 22,441
Raw materials	10,576	11,960
Inventories	$ 28,826	$ 34,401

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Balance Sheet Details - Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Balance Sheet Details [Abstract]
Contract assets	$ 123,947	$ 79,407
Prepaid expenses	50,914	49,051
Capitalized contract acquisition costs	28,111	28,228
Other	35,191	26,188
Other Assets, Current	$ 238,163	$ 182,874

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Balance Sheet Details - Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Balance Sheet Details [Abstract]
Intangible assets	$ 236,371	$ 108,903
Contract assets	54,523	53,085
Capitalized contract acquisition costs	38,325	31,218
Other	13,837	10,575
Other Assets, Noncurrent	$ 343,056	$ 203,781

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Balance Sheet Details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Balance Sheet Details [Abstract]
Payroll and benefits	$ 139,167	$ 138,453
Operating lease liabilities, current	46,490	0
Income and other tax accruals	35,855	31,801
Other	79,526	65,615
Accrued Liabilities, Current	$ 301,038	$ 235,869

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Balance Sheet Details - Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Balance Sheet Details [Abstract]
Income taxes payable	$ 39,784	$ 42,324
Deferred rent	0	66,103
Other	10,033	23,426
Other long-term liabilities	$ 49,817	$ 131,853

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Debt Facilities - Narrative (Details)			9 Months Ended
	Jan. 31, 2020 USD ($)	Jan. 24, 2020 USD ($)	Jun. 30, 2020 USD ($) extension
Term Loan Facility
Debt Instrument [Line Items]
Aggregate principal amount		$ 400,000,000.0
Debt issuance costs		$ 2,200,000	$ 1,900,000
Redemption percentage		1.25%
Long-term line of credit			$ 395,000,000.0
Interest rate at end of period			2.452%
Term Loan Facility | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			1.125%
Term Loan Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Term Loan Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Term Loan Facility | Alternate Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.125%
Term Loan Facility | Alternate Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.125%
Term Loan Facility | Alternate Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount	$ 350,000,000.0
Long-term line of credit			$ 0
Conditional increase in borrowing capacity	$ 150,000,000.0
Number of extensions | extension			2
Length of extension period			1 year
Outstanding line of credit balance			$ 350,000,000.0
Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee percentage	0.125%
Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee percentage	0.30%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Revolving Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Revolving Credit Facility | Alternate Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.125%
Revolving Credit Facility | Alternate Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%

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Debt Facilities - Long-term Debt Maturities (Details) - Term Loan Facility $ in Thousands	Jun. 30, 2020 USD ($)
Debt Instrument [Line Items]
2020 (remainder)	$ 0
2021	20,000
2022	20,000
2023	355,000
Total	$ 395,000

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Leases - Narrative (Details) ft² in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020 USD ($) ft²	Jun. 30, 2020 USD ($)	Oct. 01, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 316,761	$ 316,761		$ 0
Sublease Income		11,400
Sublease income payment remainder of fiscal year	1,100	1,100
Payment to be received between year two and four	$ 10,300	$ 10,300
Office Building
Lessee, Lease, Description [Line Items]
Operating lease, number of square feet | ft²	515
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets			$ 304,800
Lease liabilities			$ 386,400

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Leases - Operating Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Leases [Abstract]
Operating lease expense	$ 13,431	$ 37,724
Short-term lease expense	878	2,505
Variable lease expense	6,062	16,163
Total lease expense	$ 20,371	$ 56,392

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Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Sep. 30, 2019
Leases [Abstract]
Operating lease right-of-use assets	$ 316,761	$ 0
Operating lease liabilities, current	46,490	0
Operating lease liabilities, long-term	345,577	$ 0
Total lease liabilities	$ 392,067
Weighted average remaining lease term (in years)	10 years 4 months 24 days
Weighted average discount rate	2.61%

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Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Leases [Abstract]
2020 (remainder)	$ 11,613
2021	59,308
2022	56,111
2023	43,060
2024	38,340
2025	32,132
Thereafter	215,954
Total lease payments	456,518
Less: imputed interest	(64,451)
Total lease liabilities	$ 392,067

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Leases - Operating Lease Future Minimum ASC 840 (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2020	$ 54,046
2021	50,712
2022	47,550
2023	36,514
2024	33,971
Thereafter	242,826
Operating leases, future minimum payments due	465,619
Operating Leases, Future Minimum Payments Receivable [Abstract]
2020	683
2021	1,051
2022	1,082
2023	368
2024	0
Thereafter	0
Operating leases, future minimum payments receivable	3,184
Future Minimum Operating Net Lease Payments Fiscal Year Maturity [Abstract]
2020	53,363
2021	49,661
2022	46,468
2023	36,146
2024	33,971
Thereafter	242,826
Future minimum operating net lease payments	$ 462,435

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Commitments And Contingencies (Details)	9 Months Ended
	Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Product warranty period	1 year

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	20.40%	20.10%	23.10%	21.30%
Unrecognized tax benefit	$ 41.1		$ 41.1

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Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net income	$ 69,872	$ 85,905	$ 229,778	$ 332,897
Denominator
Weighted average shares outstanding — basic (shares)	60,978	59,981	60,831	59,963
Dilutive effect of common shares from stock options and restricted stock units	437	215	351	409
Weighted average shares outstanding — diluted (shares)	61,415	60,196	61,182	60,372
Basic net income per share (dollars per share)	$ 1.15	$ 1.43	$ 3.78	$ 5.55
Diluted net income per share (dollars per share)	$ 1.14	$ 1.43	$ 3.76	$ 5.51

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Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment geographic_region	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			1
Number of geographic regions | geographic_region			3
Net revenues	$ 583,252	$ 563,394	$ 1,736,006	$ 1,652,059
Long-lived assets	228,293		228,293		$ 223,426
United States
Segment Reporting Information [Line Items]
Net revenues	309,645	273,273	887,336	820,061
Long-lived assets	195,261		195,261		194,176
Other
Segment Reporting Information [Line Items]
Net revenues	22,155	27,429	71,312	79,697
Total Americas
Segment Reporting Information [Line Items]
Net revenues	331,800	300,702	958,648	899,758
EMEA
Segment Reporting Information [Line Items]
Net revenues	141,249	132,806	445,186	418,339
Long-lived assets	17,223		17,223		13,451
Asia Pacific
Segment Reporting Information [Line Items]
Net revenues	110,203	$ 129,886	332,172	$ 333,962
Other countries
Segment Reporting Information [Line Items]
Long-lived assets	$ 15,809		$ 15,809		$ 15,799
Ingram Micro, Inc. | Net Revenue | Geographic Concentration
Segment Reporting Information [Line Items]
Concentration risk percentage	16.00%	17.80%	16.60%	18.20%
Westcon Group, Inc. | Net Revenue | Geographic Concentration
Segment Reporting Information [Line Items]
Concentration risk percentage	0.00%	10.00%	0.00%	10.30%
Arrow ECS | Net Revenue | Geographic Concentration
Segment Reporting Information [Line Items]
Concentration risk percentage	11.10%	0.00%	10.30%	10.30%
Tech Data | Net Revenue | Geographic Concentration
Segment Reporting Information [Line Items]
Concentration risk percentage	0.00%	10.80%	0.00%	10.20%

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Restructuring Charges - Narrative (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($) employee	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Restructuring Charges [Abstract]
Number of employees in reduction of force program | employee		75
Restructuring charges | $	$ 0	$ 7,800	$ 0	$ 7,800	$ 0

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Restructuring Charges - Restructuring Activity (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Accrued expenses (Beginning balance)		$ 0		$ 0
Restructuring charges	$ 0	$ 7,800	$ 0	7,800	$ 0
Cash payments				(7,613)
Non-cash items				0
Accrued expenses (Ending balance)	$ 187			$ 187

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Label	Element	Value
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 36,048,000
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 36,048,000