A10 Networks (ATEN) 10-Q 2019 Q2 Quarterly report

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

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

For the quarterly period ended June 30, 2019

OR

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

For the transition period fromto

Commission file number: 001-36343

A10 NETWORKS, INC.

(Exact Name of Registrant as Specified in its Charter)

Delaware	20-1446869
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
3 West Plumeria Drive, San Jose, California 95134
(Address of Principal Executive Offices and Zip Code)

(408) 325-8668

(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, $0.00001 par value	ATEN	New York Stock Exchange

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  x    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  x    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.

Large accelerated filer	¨	Accelerated filer	x
Non-accelerated filer	¨	Smaller reporting company	¨
		Emerging growth company	x

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. x

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

As of July 26, 2019, the number of outstanding shares of the registrant’s common stock, par value $0.00001 per share, was 76,555,094.

A10 NETWORKS, INC. FORM 10-Q TABLE OF CONTENTS
	Page No.
PART I. FINANCIAL INFORMATION	2
Item 1. Condensed Consolidated Financial Statements (unaudited):	2
Condensed Consolidated Balance Sheets as of June 30, 2019 and December 31, 2018	2
Condensed Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2019 and 2018	3
Condensed Consolidated Statements of Comprehensive Loss for the Three and Six Months Ended June 30, 2019 and 2018	4
Condensed Consolidated Statements of Stockholders’ Equity for the Three and Six Months Ended June 30, 2019 and 2018	5
Condensed Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2019 and 2018	6
Notes to Condensed Consolidated Financial Statements	7
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	22
Item 3. Quantitative and Qualitative Disclosures About Market Risk	35
Item 4. Controls and Procedures	36
PART II. OTHER INFORMATION	39
Item 1. Legal Proceedings	39
Item 1A. Risk Factors	39
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds	66
Item 3. Defaults Upon Senior Securities	66
Item 4. Mine Safety Disclosures	67
Item 5. Other Information	67
Item 6. Exhibits	67
Signatures	68

1

PART I. FINANCIAL INFORMATION

ITEM 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(unaudited, in thousands, except par value)

	June 30, 2019			December 31, 2018
ASSETS
Current assets:
Cash and cash equivalents	$	36,818		$	40,621
Marketable securities	82,478			87,754
Accounts receivable, net of allowances of $58 and $319, respectively	45,251			53,972
Inventory	22,522			17,930
Prepaid expenses and other current assets	14,746			14,662
Total current assets	201,815			214,939
Property and equipment, net	7,408			7,262
Goodwill	1,307			1,307
Intangible assets	3,026			3,748
Other non-current assets	13,256			8,620
Total assets	$	226,812		$	235,876
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	7,749		$	8,202
Accrued liabilities	20,209			25,291
Deferred revenue	60,571			63,874
Total current liabilities	88,529			97,367
Deferred revenue, non-current	37,220			34,092
Other non-current liabilities	2,737			534
Total liabilities	128,486			131,993
Commitments and contingencies (Note 2 and Note 6)
Stockholders' equity:
Common stock, $0.00001 par value: 500,000 shares authorized; 76,082 and 74,301 shares issued and outstanding, respectively	1			1
Additional paid-in-capital	388,356			376,272
Accumulated other comprehensive income (loss)	258			(144		)
Accumulated deficit	(290,289		)	(272,246		)
Total stockholders' equity	98,326			103,883
Total liabilities and stockholders' equity	$	226,812		$	235,876

See accompanying notes to the condensed consolidated financial statements.

2

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited, in thousands, except per share amounts)

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2019			2018			2019			2018
Revenue:
Products	$	26,785		$	39,224		$	55,015		$	67,373
Services	22,404			21,489			44,464			42,523
Total revenue	49,189			60,713			99,479			109,896
Cost of revenue:
Products	6,891			9,080			14,407			16,189
Services	4,380			4,107			9,114			8,882
Total cost of revenue	11,271			13,187			23,521			25,071
Gross profit	37,918			47,526			75,958			84,825
Operating expenses:
Sales and marketing	23,626			25,788			48,109			52,692
Research and development	14,617			15,572			30,783			34,369
General and administrative	6,099			9,858			14,457			21,452
Total operating expenses	44,342			51,218			93,349			108,513
Loss from operations	(6,424		)	(3,692		)	(17,391		)	(23,688		)
Non-operating income (expense):
Interest expense	(37		)	(32		)	(192		)	(65		)
Interest and other income (expense), net	776			(429		)	143			137
Total non-operating income (expense), net	739			(461		)	(49		)	72
Loss before income taxes	(5,685		)	(4,153		)	(17,440		)	(23,616		)
Provision for income taxes	86			379			603			586
Net loss	$	(5,771	)	$	(4,532	)	$	(18,043	)	$	(24,202	)
Net loss per share:
Basic and diluted	$	(0.08	)	$	(0.06	)	$	(0.24	)	$	(0.33	)
Weighted-average shares used in computing net loss per share:
Basic and diluted	75,712			72,707			75,263			72,471

 See accompanying notes to the condensed consolidated financial statements.

3

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(unaudited, in thousands)

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net loss	$	(5,771	)	$	(4,532	)	$	(18,043	)	$	(24,202	)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on marketable securities	162			75			402			(98		)
Comprehensive loss	$	(5,609	)	$	(4,457	)	$	(17,641	)	$	(24,300	)

See accompanying notes to the condensed consolidated financial statements.

4

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(unaudited, in thousands)

			Three Months Ended June 30,						Six Months Ended June 30,
			2019			2018			2019			2018
Shares of common stock issued and outstanding
	Beginning balance		75,183			72,707			74,301			71,692
	Common stock issued under employee equity incentive plans		899			—			1,781			1,015
		Ending balance	76,082			72,707			76,082			72,707
Stockholders' equity
	Common stock:
		Beginning balance	$	1		$	1		$	1		$	1
		Common stock issued under employee equity incentive plans	—			—			—			—
		Ending balance	1			1			1			1
	Additional paid-in capital:
		Beginning balance	381,195			364,953			376,272			355,533
		Common stock issued under employee equity incentive plans	2,233			—			3,260			1,269
		Stock-based compensation	4,928			2,572			8,824			10,723
		Ending balance	388,356			367,525			388,356			367,525
	Accumulated other comprehensive income (loss):
		Beginning balance	96			(296		)	(144		)	(123		)
		Unrealized gain (loss) on marketable securities, net of tax	162			75			402			(98		)
		Ending balance	258			(221		)	258			(221		)
	Accumulated deficit:
		Beginning balance	(284,518		)	(264,298		)	(272,246		)	(257,025		)
		Cumulative effect adjustment from adoption of ASU 2014-09	—			—			—			12,397
		Net loss	(5,771		)	(4,532		)	(18,043		)	(24,202		)
		Ending balance	(290,289		)	(268,830		)	(290,289		)	(268,830		)
Total stockholders' equity			$	98,326		$	98,475		$	98,326		$	98,475

See accompanying notes to the condensed consolidated financial statements.

5

A10 NETWORKS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

	Six Months Ended June 30,
	2019			2018
Cash flows from operating activities:
Net loss	$	(18,043	)	$	(24,202	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,982			4,103
Stock-based compensation	8,824			10,723
Other non-cash items	(310		)	(234		)
Changes in operating assets and liabilities:
Accounts receivable	8,802			(1,941		)
Inventory	(5,045		)	1,993
Prepaid expenses and other assets	63			(705		)
Accounts payable	(434		)	(3,035		)
Accrued and other liabilities	(9,372		)	3,163
Deferred revenue	(175		)	7,447
Other	123			118
Net cash used in operating activities	(10,585		)	(2,570		)
Cash flows from investing activities:
Proceeds from sales of marketable securities	16,134			13,877
Proceeds from maturities of marketable securities	19,250			30,655
Purchases of marketable securities	(29,557		)	(46,890		)
Purchase of investment	—			(1,000		)
Purchases of property and equipment	(2,303		)	(1,289		)
Net cash provided by (used in) investing activities	3,524			(4,647		)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee equity incentive plans	3,260			1,269
Other	(2		)	(52		)
Net cash provided by financing activities	3,258			1,217
Net decrease in cash and cash equivalents	(3,803		)	(6,000		)
Cash and cash equivalents - beginning of period	40,621			46,567
Cash and cash equivalents - end of period	$	36,818		$	40,567
Non-cash investing and financing activities:
Inventory transfers to property and equipment	$	453		$	619
Purchases of property and equipment included in accounts payable	$	19		$	38

See accompanying notes to the condensed consolidated financial statements.

6

A10 Networks, Inc.

Notes to Condensed Consolidated Financial Statements

(unaudited)

1. Description of Business and Summary of Significant Accounting Policies

Description of Business

A10 Networks, Inc. (together with our subsidiaries, the “Company”, “we”, “our” or “us”) was incorporated in California in 2004 and reincorporated in Delaware in March 2014. We are headquartered in San Jose, California and have wholly-owned subsidiaries throughout the world including Asia and Europe.

We are a leading provider of secure application solutions and services that enable a new generation of intelligently connected companies with the ability to continuously improve cyber protection and digital responsiveness across dynamic Information Technology (“IT”) and network infrastructures. Our product portfolio consists of six secure application solutions: Thunder Application Delivery Controller (“ADC”), Lightning Application Delivery Controller (“Lightning ADC”), Thunder Carrier Grade Networking (“CGN”), Thunder Threat Protection System (“TPS”), Thunder SSL Insight (“SSLi”) and Thunder Convergent Firewall (“CFW”); and two intelligent management and automation tools: Harmony Controller and aGalaxy TPS. Our solutions are available in a variety of form factors, such as optimized hardware appliances, bare metal software, containerized software, virtual appliances and cloud-native software.

Basis of Presentation

The accompanying unaudited condensed consolidated financial statements include those of A10 Networks, Inc. and its subsidiaries after elimination of all intercompany accounts and transactions.

We have prepared the accompanying unaudited condensed consolidated financial statements pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). As permitted under these rules and regulations, we have condensed or omitted certain financial information and footnote disclosures we normally include in our annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The unaudited condensed consolidated balance sheet as of December 31, 2018 has been derived from our audited financial statements, which are included in our 2018 Annual Report on Form 10-K, as amended by Form 10-K/A, for the year ended December 31, 2018 on file with the SEC (the “2018 Annual Report”).

These financial statements have been prepared on the same basis as our annual financial statements and, in management’s opinion, reflect all adjustments consisting only of normal recurring adjustments that are necessary for a fair presentation of our financial information. Our interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. 

These financial statements and accompanying notes should be read in conjunction with the financial statements and accompanying notes thereto in the 2018 Annual Report.

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those estimates and assumptions affect revenue recognition and deferred revenue, the allowance for doubtful accounts, the sales return reserve, the valuation of inventory, the fair value of marketable securities, the incremental borrowing rate used in determining operating lease liabilities, contingencies and litigation, accrued liabilities, deferred commissions and the determination of fair value of stock-based compensation. These estimates are based on information available as of the date of the condensed consolidated financial statements; therefore, actual results could differ from management’s estimates.

Significant Accounting Policies

The Company’s significant accounting policies are disclosed in the 2018 Annual Report. Other than the accounting policies related to the adoption of Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842) discussed below, there have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2019.

Leases

7

In February 2016, the Financial Accounting Standards Board ("FASB") issued ASU 2016-02, Leases (Topic 842) in order to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under prior generally accepted accounting principles. ASU 2016-02 requires that a lessee should recognize a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on the balance sheet.

The adoption of ASU 2016-02 on January 1, 2019 resulted in the recognition of right-of-use assets of approximately $6.0 million and lease liabilities for operating leases of approximately $6.8 million on the Company’s condensed consolidated balance sheets, with no material impact to its condensed consolidated statements of operations. See Note 2 for further information regarding the impact of the adoption of ASU 2016-02 on the Company's financial statements.

The Company determines if an arrangement is a lease at inception. For leases where the Company is the lessee, right-of-use (“ROU”) assets represent the Company’s right to use the underlying asset for the term of the lease and are included within other non-current assets on the condensed consolidated balance sheets, and the lease liabilities represent an obligation to make lease payments arising from the lease and are recorded within accrued liabilities and other non-current liabilities on the condensed consolidated balance sheets. Lease liabilities are recognized at the lease commencement date based on the present value of the future lease payments over the lease term. The Company uses its incremental borrowing rate based on the information available at the commencement date of the underlying lease arrangement to determine the present value of lease payments. The ROU asset is determined based on the lease liability initially established and reduced for any prepaid lease payments and any lease incentives received. The lease term to calculate the ROU asset and related lease liability includes options to extend or terminate the lease when it is reasonably certain that the Company will exercise the option. The Company’s lease agreements generally do not contain any material variable lease payments, residual value guarantees or restrictive covenants.

The Company elected the package of practical expedients permitted under the transition guidance, which allowed for the carry-forward of the Company’s historical lease classification and assessment on whether a contract is or contains a lease. The Company elected to not apply the new standard’s recognition requirements to leases with an initial term of 12 months or less and instead elected to recognize lease payments in the condensed consolidated statements of operations on a straight-line basis over the lease term. The Company did not elect to apply the hindsight practical expedient when determining lease term and assessing impairment of right-of-use assets.

Lease expense for operating leases is recognized on a straight-line basis over the lease term as an operating expense while expense for financing leases is recognized as depreciation expense and interest expense using the accelerated interest method of recognition. The Company accounts for lease components and non-lease components as a single lease component. 

Concentration of Credit Risk and Significant Customers

Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, marketable securities and accounts receivable. Our cash, cash equivalents and marketable securities are held and invested in high-credit quality financial instruments by recognized financial institutions and are subject to minimum credit risk.

Our accounts receivable are unsecured and represent amounts due to us based on contractual obligations of our customers. We mitigate credit risk in respect to accounts receivable by performing periodic credit evaluations based on a number of factors, including past transaction experience, evaluation of credit history and review of the invoicing terms of the contract. We generally do not require our customers to provide collateral to support accounts receivable.

Significant customers, including distribution channel partners and direct customers, are those which represent 10% or more of our total revenue for each period presented or our gross accounts receivable balance as of each respective balance sheet date. Revenues from our significant customers as a percentage of our total revenue are as follows:

	Three Months Ended   June 30,		Six Months Ended   June 30,
Customers	2019	2018	2019	2018
Customer A (a distribution channel partner)	14%	*	14%	*
Customer B (a distribution channel partner)	*	20%	*	14%
Customer C (a distribution channel partner)	12%	*	*	*

8

* represents less than 10% of total revenue

As of June 30, 2019, three customers accounted for 16%, 14% and 10%, respectively, of our total gross accounts receivable. As of December 31, 2018, two customers accounted for 16% and 12%, respectively, of our total gross accounts receivable.

Recent Accounting Pronouncements Not Yet Effective

There have been no new accounting pronouncements issued by the FASB during the six months ended June 30, 2019, as compared to the recent accounting pronouncements described in Note 1 of the Company’s 2018 Annual Report, that the Company believes are of significance or potential significance to the Company.  

2. Leases

We lease various operating spaces in the United States, Asia and Europe under non-cancellable operating lease arrangements that expire on various dates through July 2027. These arrangements require us to pay certain operating expenses, such as taxes, repairs and insurance, and contain renewal and escalation clauses.

The table below presents the Company’s right-of-use assets and lease liabilities as of June 30, 2019 (in thousands):

		June 30, 2019
Operating leases
Right-of-use assets:
	Other non-current assets	$	4,812
Total right-of-use assets		$	4,812
Lease liabilities:
	Accrued liabilities	$	3,081
	Other non-current liabilities	2,350
Total operating lease liabilities		$	5,431

The aggregate future lease payments for operating leases as of June 30, 2019 were as follows (in thousands):

Remainder of 2019	$	1,917
2020	2,051
2021	1,293
2022	337
Total lease payments	5,598
Less: imputed interest	(167		)
Present value of lease liabilities	$	5,431

The components of lease costs were as follows (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Operating lease costs	$	852	$	1,745
Short-term lease costs	138		275
Total lease costs	$	990	$	2,020

Average lease terms and discount rates for the Company’s operating leases were as follows (in thousands):

9

	June 30, 2019
Weighted-average remaining term (years)	2.07
Weighted-average discount rate	3.31	%

Supplemental cash flow information for the Company’s operating leases (in thousands):

		Six Months Ended June 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
	Operating cash flows from operating leases	$	1,982
Right-of-use assets obtained in exchange for new lease liabilities		$	467

New Corporate Office Lease

On May 2, 2019 (the “Effective Date”), the Company entered into a sublease agreement (the “Sublease”) with Marvell Semiconductor, Inc. (“Sublandlord”) for corporate office space located at 2300 Orchard Parkway, San Jose, California, 95131 (the “Premises”). The Company intends to use the premises as a corporate office space and for research and development purposes. The term of the Sublease is seven years and eight months from the earlier of (i) December 1, 2019 or (ii) the date the Company commences business operations at the Premises. The Sublease provides for monthly base rent of approximately $262,000 per month for the first year with annual increases thereafter. The total base rent through the end of the term of the Sublease is approximately $26.4 million. In addition to base rent, the Company will also be responsible for operating and other expenses.

The Company anticipates gaining access and the right of use of the lease facility in the fourth quarter of 2019 and will account for the sublease arrangement under ASC 842.

Lease Commitments as of December 31, 2018

As previously disclosed in the Company’s 2018 Annual Report and under the previous lease accounting standard, ASC 840, Leases, the aggregate future minimum lease payments for operating leases as of December 31, 2018 were as follows (in thousands):

2019	$	3,907
2020	1,921
2021	1,194
2022	313
Total	$	7,335

10

3. Marketable Securities and Fair Value Measurements

Marketable Securities

Marketable securities, classified as available-for-sale, consisted of the following (in thousands):

	June 30, 2019									December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	10,998	$	27	$	—		$	11,025	$	11,000	$	7	$	(3	)	$	11,004
Corporate securities	50,033		189		(9		)	50,213		46,442		11		(116		)	46,337
U.S. Treasury and agency securities	1,749		—		(2		)	1,747		1,748		—		(12		)	1,736
Commercial paper	4,955		8		—			4,963		12,327		1		(5		)	12,323
Asset-backed securities	14,485		46		(1		)	14,530		16,381		5		(32		)	16,354
Total	$	82,220	$	270	$	(12	)	$	82,478	$	87,898	$	24	$	(168	)	$	87,754

During the six months ended June 30, 2019 and 2018, we did not reclassify any amount to earnings from accumulated other comprehensive loss related to unrealized gains or losses.

The following table summarizes the cost and estimated fair value of marketable securities based on stated effective maturities as of June 30, 2019 (in thousands):

	Amortized Cost		Fair Value
Less than 1 year	$	42,570	$	42,632
Mature in 1 - 3 years	39,650		39,846
Total	$	82,220	$	82,478

All available-for-sale securities have been classified as current because they are available for use in current operations.

Marketable securities in an unrealized loss position consisted of the following (in thousands):

	Less Than 12 Months					12 Months or More					Total
June 30, 2019	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Corporate securities	$	1,499	$	(1	)	$	5,642	$	(8	)	$	7,141	$	(9	)
U.S. Treasury and agency securities	—		—			1,747		(2		)	1,747		(2		)
Asset-backed securities	—		—			1,503		(1		)	1,503		(1		)
Total	$	1,499	$	(1	)	$	8,892	$	(11	)	$	10,391	$	(12	)

11

	Less Than 12 Months					12 Months or More					Total
December 31, 2018	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
Certificates of deposit	$	2,997	$	(3	)	$	—	$	—		$	2,997	$	(3	)
Corporate securities	29,435		(68		)	7,601		(48		)	37,036		(116		)
U.S. Treasury and agency securities	992		(7		)	744		(5		)	1,736		(12		)
Commercial paper	9,888		(5		)	—		—			9,888		(5		)
Asset-backed securities	8,499		(15		)	4,758		(17		)	13,257		(32		)
Total	$	51,811	$	(98	)	$	13,103	$	(70	)	$	64,914	$	(168	)

Based on evaluation of securities that have been in a continuous loss position, we did not recognize any other-than-temporary impairment charges during the six months ended June 30, 2019 and 2018.

Fair Value Measurements

The following is a summary of our cash, cash equivalents and marketable securities measured at fair value on a recurring basis (in thousands):

	June 30, 2019								December 31, 2018
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash	$	28,565	$	—	$	—	$	28,565	$	39,113	$	—	$	—	$	39,113
Cash equivalents	8,253		—		—		8,253		1,508		—		—		1,508
Certificates of deposit	—		11,025		—		11,025		—		11,004		—		11,004
Corporate securities	—		50,213		—		50,213		—		46,337		—		46,337
U.S. Treasury and agency securities	—		1,747		—		1,747		—		1,736		—		1,736
Commercial paper	—		4,963		—		4,963		—		12,323		—		12,323
Asset-backed securities	—		14,530		—		14,530		—		16,354		—		16,354
Total	$	36,818	$	82,478	$	—	$	119,296	$	40,621	$	87,754	$	—	$	128,375

There were no transfers between Level 1 and Level 2 fair value measurement categories during the six months ended June 30, 2019 and 2018.

4. Condensed Consolidated Financial Statement Details

Inventory

Inventory consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Raw materials	$	8,465	$	7,979
Finished goods	14,057		9,951
Total inventory	$	22,522	$	17,930

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Prepaid expenses	$	7,953	$	6,679
Deferred contract acquisition costs	5,272		6,564
Other	1,521		1,419
Total prepaid and other current assets	$	14,746	$	14,662

Property and Equipment, Net

Property and equipment, net, consisted of the following (in thousands):

	Useful Life	June 30, 2019			December 31, 2018
	(in years)
Equipment	1 - 3	$	49,636		$	49,804
Software	1 - 3	4,352			4,088
Furniture and fixtures	1 - 3	967			967
Leasehold improvements	2 - 8	3,834			3,832
Construction in progress		787			160
Property and equipment, gross		59,576			58,851
Less: accumulated depreciation		(52,168		)	(51,589		)
Property and equipment, net		$	7,408		$	7,262

Depreciation expense on property and equipment was $1.4 million and $1.7 million for the three months ended June 30, 2019 and 2018, respectively, and $2.6 million and $3.4 million for the six months ended June 30, 2019 and 2018, respectively.

Intangible Assets

Purchased intangible assets, net, consisted of the following (in thousands):

	June 30, 2019							December 31, 2018
	Cost		Accumulated Amortization			Net		Cost		Accumulated Amortization			Net
Developed technology	$	5,050	$	(3,030	)	$	2,020	$	5,050	$	(2,525	)	$	2,525
Patents	2,936		(1,930		)	$	1,006	2,936		(1,713		)	1,223
Total intangible assets	$	7,986	$	(4,960	)	$	3,026	$	7,986	$	(4,238	)	$	3,748

Amortization expense related to purchased intangible assets was $0.4 million and $0.3 million for the three months ended June 30, 2019 and 2018, respectively, and $0.7 million for each of the six months ended June 30, 2019 and 2018. Purchased intangible assets will be amortized over a remaining weighted average useful life of 2.1 years.

Future amortization expense for purchased intangible assets as of June 30, 2019 is as follows (in thousands):

Fiscal Year
Remainder of 2019	$	721
2020	1,442
2021	863
Total	$	3,026

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Accrued Liabilities

Accrued liabilities consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Accrued compensation and benefits	$	8,872	$	15,283
Accrued tax liabilities	3,712		4,455
Lease liability	3,081		—
Other	4,544		5,553
Total accrued liabilities	$	20,209	$	25,291

Deferred Revenue

Deferred revenue consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Deferred revenue:
Products	$	5,799		$	5,216
Services	91,992			92,750
Total deferred revenue	97,791			97,966
Less: current portion	(60,571		)	(63,874		)
Non-current portion	$	37,220		$	34,092

5. Credit Facility

In November 2016, we entered into a loan and security agreement (the “2016 Credit Facility”) with Silicon Valley Bank (“SVB”) as the lender. The 2016 Credit Facility provides a three-year, $25.0 million revolving credit facility, which includes a maximum of $25.0 million letter of credit subfacility. When the balance of our cash, cash equivalents and marketable securities minus outstanding revolving loans and letters of credit equals or exceeds $50.0 million, loans may be advanced under the 2016 Credit Facility up to the full $25.0 million. When our net cash falls below $50.0 million, loans may be advanced under the 2016 Credit Facility based on a borrowing base equal to a specified percentage of the value of our eligible accounts receivable. The loans bear interest, at our option, at (i) the prime rate reported in The Wall Street Journal, minus 0.50% or (ii) a LIBOR rate determined in accordance with the 2016 Credit Facility, plus 2.50%. We are required to pay customary closing fees, commitment fees and letter of credit fees for a facility of this size and type.

In September 2018, we entered into an amendment with SVB to reduce the unused revolving credit facility fee on the 2016 Credit Facility from 0.4% to 0.3%.

Our obligations under the 2016 Credit Facility are secured by substantially all of our assets, excluding our intellectual property. The 2016 Credit Facility contains customary affirmative and negative covenants. In addition, the 2016 Credit Facility requires us to maintain compliance with an adjusted quick ratio of not less than 1.50:1.00, as determined in accordance with the 2016 Credit Facility. As of June 30, 2019, we had no outstanding balance under the 2016 Credit Facility and were in compliance with all facility covenants.

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6. Commitments and Contingencies

Legal Proceedings

Litigation

From time to time, we may be party or subject to various legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business. Some of these proceedings involve claims that are subject to substantial uncertainties and unascertainable damages. We make a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Unless otherwise specifically disclosed in this note, we have determined that no provision for liability nor disclosure is required related to any claim against us because: (a) there is not a reasonable possibility that a loss exceeding amounts already recognized (if any) may be incurred with respect to such claim; (b) a reasonably possible loss or range of loss cannot be estimated; or (c) such estimate is immaterial.

On March 22, 2018, the Company, our Chief Executive Officer, our Chief Financial Officer, and certain former officers, were named as defendants in a putative class action lawsuit filed in the United States District Court for the Northern District of California, captioned Shah v. A10 Networks, Inc. et al., 3:18-cv-01772-VC (the “Securities Action”). On August 31, 2018, the court appointed a lead plaintiff. On October 5, 2018, the lead plaintiff filed an amended complaint. The amended complaint names the same defendants as the initial complaint, in addition to one of the Company’s former executive vice presidents. The amended complaint asserts claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder. The amended complaint named the same defendants as the initial complaint, in addition to one of the Company’s former executive vice presidents. The Company and individual defendants filed motions to dismiss the amended complaint. On February 21, 2019, the court granted the motions to dismiss with leave to amend within 21 days. The lead plaintiff did not file an amended complaint by the Court-ordered deadline. Instead, on March 21, 2019, the lead plaintiff filed a notice of appeal in the United States Court of Appeals for the Ninth Circuit. On April 5, 2019, the clerk of court suspended briefing on the appeal and ordered that, by April 26, 2019, appellants shall either move for voluntary dismissal or show cause why the appeal should not be dismissed for lack of jurisdiction. On April 25, 2019, appellants moved to voluntarily dismiss the appeal without prejudice, and that motion was granted on May 1, 2019. The district court entered final judgment dismissing lead plaintiff’s claims on May 8, 2019. The lead plaintiff subsequently filed a notice of appeal on June 6, 2019.

On May 30, 2018, certain of our current and former directors and officers were named as defendants in a putative shareholder derivative lawsuit filed in the United States District Court for the Northern District of California, captioned Moulton v. Chen et al., 3:18-cv-03223-VC (the “Derivative Action”). We were also named as a nominal defendant. The complaint in the Derivative Action alleges breaches of fiduciary duties and other related claims in connection with purported misrepresentations related to internal controls and revenues and failures to ensure that financial statements were made in accordance with generally accepted accounting principles. Plaintiff seeks unspecified damages allegedly sustained by the Company, restitution, and other relief. On July 11, 2018 the Derivative Action was stayed until a motion to dismiss in the Securities Action is granted with prejudice or denied in whole or in part. Following dismissal of the Securities Action, Plaintiff voluntarily dismissed his claims on June 7, 2019.

Investigations

The U.S. Securities and Exchange Commission (“SEC”) is conducting a private investigation into possible violations of Section 17(a) of the Securities Act of 1933 and Sections 10(b), 13(a), and 13(b) of the Securities Exchange Act of 1934 (“Exchange Act”) and Rules 10b-5, 12b-20, 13a-1, 13a-11, 13a-13, 13a-14, 13a-15, and 13b2-1 thereunder.  The Company is cooperating with the SEC regarding this investigation. The Company is unable to predict the duration, scope or outcome of the investigation, but an adverse outcome is reasonably possible. In such an event, the Company could be required to pay fines and sanctions and/or implement additional remedial measures.  However, the Company is not able to estimate the likelihood or a reasonable range of possible loss.

Lease Commitments

We lease various operating spaces in the United States, Asia and Europe under non-cancelable operating lease arrangements that expire on various dates through July 2027. These arrangements require us to pay certain operating expenses, such as taxes, repairs and insurance, and contain renewal and escalation clauses.

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Guarantees and Indemnifications

In the normal course of business, we provide indemnifications to customers against claims of intellectual property infringement made by third parties arising from the use of our products. Other guarantees or indemnification arrangements include guarantees of product and service performance, and standby letters of credit for lease facilities and corporate credit cards. We have not recorded a liability related to these indemnification and guarantee provisions and our guarantees and indemnification arrangements have not had any significant impact on our consolidated financial statements to date.

7. Equity Incentive Plans and Stock-Based Compensation

Equity Incentive Plans

2014 Equity Incentive Plan

The 2014 Equity Incentive Plan (the “2014 Plan”) provides for the granting of stock options, restricted stock awards, restricted stock units (“RSUs”), performance-based RSUs (“PSUs”), stock appreciation rights, performance units and performance shares to our employees, consultants and members of our board of directors. In June 2015, our board of directors adopted and our stockholders approved an amendment and restatement of the 2014 Plan, which increased the number of shares available for issuance under the 2014 Plan by the number of shares granted under the 2008 Stock Plan (the “2008 Plan”) that were or may in the future be canceled or otherwise forfeited or repurchased after March 20, 2014.

The shares authorized for the 2014 Plan increase annually by the least of (i) 8,000,000 shares, (ii) 5% of the outstanding shares of common stock on the last day of our immediately preceding fiscal year, or (iii) such other amount as determined by our Board of Directors. Accordingly, effective January 1, 2019, the number of shares in the 2014 Plan increased by 3,715,060 shares, representing 5% of the prior year end’s common stock outstanding. As of June 30, 2019, we had 11,983,811 shares available for future grant under the 2014 Plan.

To date, we have granted stock options, RSUs and PSUs under the 2014 Plan. Stock options expire no more than 10 years from the grant date and generally vest over four years. In the case of an incentive stock option granted to an employee who, at the time of grant, owns stock representing more than 10% of the total combined voting power of all classes of stock, the per share exercise price will be no less than 110% of the fair market value per share on the date of grant, and the incentive stock option will expire no later than five years from the date of grant. For incentive stock options granted to any other employees and nonstatutory stock options granted to employees, consultants, or members of our board of directors, the per share exercise price will be no less than 100% of the fair market value per share on the date of grant. RSUs and PSUs generally vest over one to four years.

2014 Employee Stock Purchase Plan

The 2014 Employee Stock Purchase Plan (the “2014 Purchase Plan”) was suspended effective March 16, 2018 due to the delay of the Form 10-K filing for the year ended December 31, 2017. In October 2018, the Board approved amending the 2014 Purchase Plan (the “Amended 2014 Purchase Plan”) in order to, among other things, reduce the maximum contribution participants can make under the plan from 15% to 10% of eligible compensation. The Amended 2014 Purchase Plan also reflects revised offering periods, which were changed from 24 months to six months in duration and that begin on or about December 1 and June 1 each year, starting in December 2018. The Amended 2014 Purchase Plan permits eligible employees to purchase shares of our common stock through payroll deductions with up to 10% of their gross eligible earnings subject to certain Internal Revenue Code limitations. The purchase price of the shares is 85% of the lower of the fair market value of our common stock on the first day of a six-month offering period or the relevant purchase date. In addition, no participant may purchase more than 1,500 shares of common stock in each purchase period.

Employees purchased 322,903 shares at an average price of $5.18 during the six months ended June 30, 2019. The intrinsic value of shares purchased during the six months ended June 30, 2019 was $0.3 million. The intrinsic value is calculated as the difference between the market value on the date of purchase and the purchase price of the shares. As of June 30, 2019, the Company had 2,742,279 shares available for future issuance under the Amended 2014 Purchase Plan.

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Stock-Based Compensation

A summary of our stock-based compensation expense is as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Stock-based compensation by type of award:
Stock options	$	157	$	302	$	341	$	631
Stock awards	4,522		2,270		7,996		4,935
Employee stock purchase rights (1)	249		—		487		5,157
	$	4,928	$	2,572	$	8,824	$	10,723
Stock-based compensation by category of expense:
Cost of revenue	$	458	$	197	$	782	$	1,090
Sales and marketing	1,860		701		3,181		3,466
Research and development	1,593		1,003		2,924		4,385
General and administrative	1,017		671		1,937		1,782
	$	4,928	$	2,572	$	8,824	$	10,723

(1) Amount for the six months ended June 30, 2018 includes $4.1 million of accelerated stock-based compensation expense. In March 2018, as a result of a suspension of the 2014 Purchase Plan due to our non-timely filing status, all unrecognized stock-based compensation expense related to the 2014 Purchase Plan was accelerated and recognized within the condensed consolidated statement of operations.

As of June 30, 2019, the Company had $30.8 million of unrecognized stock-based compensation expense related to unvested stock-based awards which will be recognized over a weighted-average period of 2.5 years.

Stock Options

The following tables summarize our stock option activities and related information:

	Number of Shares (thousands)		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (years)	Aggregate Intrinsic Value (thousands)
Outstanding as of December 31, 2018	4,674		$	5.19
Granted	—		$	—
Exercised	(496	)	$	3.20
Canceled	(93	)	$	9.03
Outstanding as of June 30, 2019	4,085		$	5.34	4.86	$	7,802
Vested and exercisable as of June 30, 2019	3,688		$	5.22	4.47	$	7,517

As of June 30, 2019, the aggregate intrinsic value represents the excess of the closing price of our common stock of $6.82 over the exercise price of the outstanding in-the-money options.

The intrinsic value of options exercised was $1.8 million and $1.1 million during the six months ended June 30, 2019 and 2018, respectively.

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Stock Awards

We have granted RSUs to our employees, consultants and members of our board of directors, and PSUs and market performance-based restricted stock units (“MSUs”) to certain executives.

In February 2016, we granted 547,000 PSUs with certain financial and operational targets. Actual performance, as measured at the time and prior to the restatement of the 2016 financial statements, resulted in participants achieving 80% of target. Given the PSUs did not contain explicit or implicit claw back rights, there was no change to stock-based compensation expense for the impact of the previously disclosed restatement of the 2016 consolidated financial statements. As of June 30, 2019, 253,203 shares had vested, 200,297 shares were forfeited, and the remaining shares 93,500 will vest (as to 80%) in February 2020 subject to continued service vesting requirements.

In October 2018, we granted 464,888 PSUs with certain financial targets. These PSUs will become eligible to vest at 75% on the second month following achievement of certain performance targets by December 31, 2020, with the remaining 25% of the PSUs to vest on the first anniversary of the initial vesting date, subject to service condition vesting requirements. None of these PSUs were vested as of June 30, 2019.

In April 2019, we granted 346,453 PSUs with certain financial targets. These PSUs will become eligible to vest at 75% on the second month following achievement of certain performance targets by December 31, 2021, with the remaining 25% of the PSUs to vest on the first anniversary of the initial vesting date, subject to service condition vesting requirements. None of these PSUs were vested as of June 30, 2019.

The following table summarizes our stock award activities and related information:

	Number of Shares (thousands)		Weighted-Average Grant Date Fair Value		Weighted-Average Remaining Vesting Term (years)
Nonvested as of December 31, 2018	5,974		$	6.51
Granted	1,245		$	6.78
Released	(962	)	$	6.73
Canceled	(580	)	$	6.41
Nonvested as of June 30, 2019	5,677		$	6.54	1.61

The aggregate fair value of stock awards released as of the respective vesting dates was $6.4 million and $4.3 million for the six months ended June 30, 2019 and 2018, respectively.

8. Net Loss Per Share

Basic net loss per share is computed using the weighted average number of common shares outstanding for the period. Diluted net loss per share is computed using the weighted average number of common shares outstanding for the period plus potential dilutive common shares, including stock options, RSUs and employee stock purchase rights, unless the potential common shares are anti-dilutive. Since we had net losses in the three and six months ended June 30, 2019 and 2018, none of the potential dilutive common shares were included in the computation of diluted shares for these periods, as inclusion of such shares would have been anti-dilutive.

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The following table presents common shares related to potentially dilutive shares excluded from the calculation of diluted net loss per share as their effect would have been anti-dilutive (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Stock options, restricted stock units and employee stock purchase rights	9,600	9,209	9,797	9,826

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9. Income Taxes

We recorded income tax expense of $0.1 million and $0.4 million for the three months ended June 30, 2019 and 2018, respectively, and $0.6 million for each of the six months ended June 30, 2019 and 2018, which primarily consisted of foreign taxes. Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the carrying amounts of existing assets and liabilities in the financial statements and their respective tax bases using tax rates expected to be in effect during the years in which the basis differences reverse.

We believe it is more likely than not that our federal and state net deferred tax assets will not be fully realized. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of our deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. A valuation allowance is recorded for loss carryforwards and other deferred tax assets where it is more likely than not that such deferred tax assets will not be realized. Accordingly, we continue to maintain a valuation allowance against all of our U.S. and certain foreign net deferred tax assets as of June 30, 2019. We will continue to maintain a full valuation allowance against our net federal, state and certain foreign deferred tax assets until there is sufficient evidence to support recoverability of our deferred tax assets.

We had $4.0 million of unrecognized tax benefits as of June 30, 2019 and December 31, 2018. We do not anticipate a material change to our unrecognized tax benefits over the next twelve months. Unrecognized tax benefits may change during the next twelve months for items that arise in the ordinary course of business.

Accrued interest and penalties related to unrecognized tax benefits are recognized as part of our income tax provision in our condensed consolidated statements of operations.

We are subject to taxation in the United States, various states, and several foreign jurisdictions. Because we have net operating loss and credit carryforwards, there are open statutes of limitations in which federal, state and foreign taxing authorities may examine our tax returns for all years from 2005 through the current period. We are not currently under examination by any taxing authorities.

10. Geographic Information

The following table depicts the disaggregation of revenue by geographic region based on the ship to location of our customers and is consistent with how we evaluate our financial performance (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
United States	$	15,278	$	30,443	$	33,378	$	51,121
Japan	14,894		11,868		28,046		24,948
Asia Pacific, excluding Japan	9,213		10,667		17,989		18,105
EMEA	6,570		5,420		13,799		11,919
Other	3,234		2,315		6,267		3,803
Total revenue	$	49,189	$	60,713	$	99,479	$	109,896

The following table is a summary of our long-lived assets which include property and equipment, net and operating lease ROU assets based on the physical location of the assets (in thousands):

	June 30, 2019		December 31, 2018
United States	$	6,843	$	5,525
Japan	3,195		1,108
Other	2,182		629
Total	$	12,220	$	7,262

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11. Revenue

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), as subsequently amended, which supersedes the revenue recognition requirements in Accounting Standards Codification (“ASC”) Topic 605, Revenue Recognition. This ASU requires an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This ASU also includes Subtopic 340-40, Other Assets and Deferred Costs - Contracts with Customers, which requires the capitalization of incremental customer acquisition costs and amortization of these costs over the contract period or estimated customer life which resulted in the recognition of a deferred commission asset on our consolidated balance sheet.

The Company adopted ASU 2014-09 and its related amendments (collectively “ASC 606”) on January 1, 2018 using the modified retrospective method. The adoption of the new standard resulted in changes to the Company’s accounting policies for revenue recognition, commissions and deferred commissions. As a result of the adoption, the Company recorded a reduction to opening accumulated deficit of $12.4 million as of January 1, 2018 due to the cumulative impact of adopting the new standard as follows:

• A decrease in total deferred revenue of $4.0 million primarily due to the removal of the current limitation on contingent revenue that would have accelerated revenue recognition for certain of our historical revenue contracts; and

• Recognition of a deferred commissions asset of $8.4 million due to the requirement under the new standard to recognize incremental customer acquisition costs in our condensed consolidated statement of operations as the related performance obligations are met as compared to the previous recognition to expense as incurred.

For additional information and disclosure of the impact of adopting the new standard, see Note 2 to the Company’s Consolidated Financial Statements included in Part II, Item 8 of the 2018 Annual Report.

Contract Balances

The following table reflects contract balances with customers (in thousands):

	June 30, 2019		December 31, 2018
Accounts receivable, net	$	45,251	$	53,972
Deferred revenue, current	60,571		63,874
Deferred revenue, non-current	37,220		34,092

We receive payments from customers based upon billing cycles. Invoice payment terms are usually ranging from 30 to 90 days.

Accounts receivable are recorded when the right to consideration becomes unconditional.

Contract assets include amounts related to our contractual right to consideration for performance obligations not yet billed and are included in prepaid and other current assets in the condensed consolidated balance sheets. The amount is immaterial as of June 30, 2019.

Deferred revenue primarily consists of amounts that have been invoiced but not yet been recognized as revenue and consists of performance obligations pertaining to support and subscription services. During the three months ended June 30, 2019 and 2018, we recognized revenue of $21.0 million and $17.2 million, respectively, and during the six months ended June 30, 2019 and 2018, we recognized revenue of $38.7 million and $36.7 million, respectively, related to deferred revenues at the beginning of the respective periods.

Deferred Contract Acquisition Costs

In connection with the adoption of ASC 340-40, we capitalize certain contract acquisition costs consisting of incremental sales commissions incurred to obtain customer contracts. Deferred commissions related to product revenues are recognized upon transfer of control to customers. Deferred commissions related to services revenue are recognized as the related performance obligations are met. Deferred commissions that will be recognized during the succeeding 12-month period

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are recorded as prepaid expenses and other current assets, and the remaining portion is recorded as other non-current assets. Amortization of deferred commissions is included in sales and marketing expense.

Deferred contract acquisition costs were $8.5 million as of June 30, 2019, and the related amortization amount was $1.9 million and $1.3 million for the three months ended June 30, 2019 and 2018, respectively, and $3.9 million and $3.0 million for the six months ended June 30, 2019 and 2018, respectively.

We had no impairment loss in relation to the costs capitalized and no asset impairment charges related to contract assets.

Remaining Performance Obligations

Remaining performance obligations represent contracted revenues that are non-cancellable and have not yet been recognized due to unsatisfied or partially satisfied performance obligations, which include deferred revenues and amounts that will be invoiced and recognized as revenues in future periods.

We expect to recognize revenue on the remaining performance obligations as follows (in thousands):

		June 30, 2019
Within 1 year		$	60,571
Next 2 to 3 years		29,678
Thereafter		7,542
	Total	$	97,791

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12. Subsequent Events

On July 26, 2019, the Company entered into a letter agreement with VIEX Capital Advisors, LLC (“VIEX”), certain entities affiliated with VIEX, and Eric Singer. Pursuant to the letter agreement, among other things, a) the Company increased the size of the Company’s board of directors (the “Board”) to six directors and appointed Mr. Singer to serve as a director, effective July 26, 2019; b) Mr. Singer was appointed to the Board’s Compensation, Nominating and Corporate Governance and Strategy Committees; c) VIEX and certain of its affiliated entities agreed to customary “standstill” provisions that will expire at 11:59 p.m., Pacific time, on the day that is 15 business days prior to the deadline for the submission of stockholder nominations of directors and business proposals for the Company’s 2020 Annual Meeting of Stockholders (the “Restricted Period”); and d) after August 25, 2019, and prior to the expiration of the Restricted Period, VIEX has the right to recommend one independent director for appointment to the Board, and the Board must take appropriate action to appoint that person.

On July 30, 2019, the Company announced the planned retirement of Lee Chen, the Company’s President and Chief Executive Officer. The Board has formed a search committee and retained an executive search firm for the purpose of recruiting and exploring potential chief executive officer candidates. Upon the appointment of a successor, Mr. Chen will resign as president and chief executive officer.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of our financial condition and results of operations (“MD&A”) should be read in conjunction with our condensed consolidated financial statements and related notes included elsewhere in this document. In addition to historical information, the MD&A contains forward-looking statements. The words “believe,” “may,” “will,” “potentially,” “estimate,” “continue,” “anticipate,” “intend,” “could,” “would,” “project,” “plan” “expect,” and similar expressions that convey uncertainty of future events or outcomes are intended to identify forward-looking statements.

These forward-looking statements include, but are not limited to, statements concerning the following:

• our ability to provide customers with improved benefits relating to their applications;

• our ability to maintain an adequate rate of revenue growth and other factors contributing to such growth;

• our ability to successfully anticipate market needs and opportunities;

• our business plan and our ability to effectively manage our growth;

• our ability to timely file financial, periodic and current reports required by the Exchange Act;

• loss or delay of expected purchases by our largest end-customers;

• our ability to further penetrate our existing customer base;

• our ability to displace existing products in established markets;

• continued growth in markets relating to network security;

• our ability to timely and effectively scale and adapt our existing technology;

• our ability to innovate new products and bring them to market in a timely manner;

• our ability to expand internationally and any related impact on profitability;

• the effects of increased competition in our market and our ability to compete effectively;

• the effects of seasonal trends on our results of operations;

• our expectations concerning relationships with third parties;

• the attraction, retention and growth of qualified employees and key personnel;

• our ability to achieve or maintain profitability while continuing to invest in our sales, marketing and research and development teams;

• our expectations regarding our future expenses;

• our exploration of strategic alternatives;

• variations in product mix or geographic locations of our sales;

• fluctuations in currency exchange rates;

• tariffs affecting us;

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• increased cost requirements of being a public company and future sales of substantial amounts of our common stock in the public markets;

• the cost and potential outcomes of litigation;

• our ability to maintain, protect, and enhance our brand and intellectual property;

• future acquisitions of or investments in complementary companies, products, services or technologies;

• our ability to effectively integrate operations of entities we have acquired or may acquire; and

• actions relating to the remediation of identified material weaknesses.

These forward-looking statements are subject to a number of risks, uncertainties, and assumptions, including those described in “Risk Factors” and elsewhere in this Quarterly Report on Form 10-Q. Moreover, we operate in a very competitive and rapidly changing environment, and new risks emerge from time to time. It is not possible forour management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make. In light of these risks, uncertainties, and assumptions, the forward-looking events and circumstances discussed in this Quarterly Report on Form 10-Q may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements.

You should not rely upon forward-looking statements as predictions of future events. Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the forward-looking statements will be achieved or occur. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of the forward-looking statements. We undertake no obligation to update publicly any forward-looking statements for any reason after the date of this Quarterly Report on Form 10-Q to conform these statements to actual results or to changes in our expectations, except as required by law.

Our investor relations website is located at https://investors.a10networks.com. We use our investor relations website, our company blog (https://www.a10networks.com/blog) and our corporate Twitter account (https://twitter.com/A10Networks) to post important information for investors, including news releases, analyst presentations, and supplemental financial information, and as a means of disclosing material non-public information and for complying with our disclosure obligations under Regulation FD. Accordingly, investors should monitor our investor relations website, our company blog and our corporate Twitter account, in addition to following press releases, SEC filings and public conference calls and webcasts. We also make available, free of charge, on our investor relations website under “SEC Filings,” our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to these reports as soon as reasonably practicable after electronically filing or furnishing those reports to the SEC.

Overview

We are a leading provider of secure application solutions and services that enable a new generation of intelligently connected companies with the ability to continuously improve cyber protection and digital responsiveness across dynamic Information Technology (“IT”) and network infrastructures. Our portfolio of software and hardware solutions combines industry-leading performance and scale with advanced intelligent automation, machine learning, data driven analytics, and threat intelligence to ensure security and availability of customer applications across their multi-cloud and mobile infrastructure networks, including on-premise, private and public clouds. As the cyber threat landscape intensifies and network architectures evolve, we are committed to providing customers with greater connected intelligence to improve the security, visibility, automation, availability, flexibility, management and performance of their applications. Our customers include leading cloud providers, web-scale businesses, service providers, government organizations and enterprises.

Our product portfolio seeks to address many of the aforementioned challenges and solution requirements. The portfolio consists of six secure application solutions: Thunder Application Delivery Controller (“ADC”), Lightning Application Delivery Controller (“Lightning ADC”), Thunder Carrier Grade Networking (“CGN”), Thunder Threat Protection System (“TPS”), Thunder SSL Insight (“SSLi”) and Thunder Convergent Firewall (“CFW”); and two intelligent management and automation tools: Harmony Controller and aGalaxy TPS. Our products are offered in a variety of form factors and payment models, including physical appliances and perpetual and subscription-based software licenses, as well as pay-as-you-go licensing models and FlexPool, a flexible consumption-based software model.

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We derive revenue from sales of products and related support services. Products revenue is generated primarily by sales of hardware appliances with perpetual licenses to our embedded software solutions. We also derive revenue from licenses to, or subscription services for, software-only versions of our solutions. We generate services revenue primarily from sales of maintenance and support contracts. Our customers predominantly purchase maintenance and support in conjunction with purchases of our products. In addition, we also derive revenue from the sale of professional services.

We sell our products globally to service providers, enterprises and web giants that depend on data center applications and networks to generate revenue and manage operations efficiently. Our end-customers operate in a variety of industries, including telecommunications, technology, industrial, retail, financial, gaming, education and government. Since inception, our customer base has grown rapidly. As of June 30, 2019, we had sold products to approximately 6,500 end customers across 116 countries.

We sell substantially all of our solutions through our high-touch sales organization as well as distribution channel partners, including distributors, value-added resellers and system integrators, and fulfill nearly all orders globally through such partners. We believe this sales approach allows us to obtain the benefits of channel distribution, such as expanding our market coverage, while still maintaining face-to-face relationships with our end-customers. We outsource the manufacturing of our hardware products to original design manufacturers. We perform quality assurance and testing at our San Jose, Taiwan and Japan distribution centers, as well as at our manufacturers’ locations.

During the first half of 2019, 34% of our total revenue was generated from the United States, 28% from Japan and 38% from other geographical regions. During the first half of 2018, 47% of our total revenue was generated from the United States, 23% from Japan and 30% from other geographical regions. Our enterprise customers accounted for 45% and 40% of our total revenue during the first half of 2019 and 2018, respectively. Our service provider customers accounted for 43% and 42% of our total revenue during the first half of 2019 and 2018, respectively. Our web giant customers accounted for 12% and 18% of our total revenue during the first half of 2019 and 2018, respectively.

As a result of the nature of our target market and the current stage of our development, a substantial portion of our revenue comes from a limited number of large customers, including service providers and web giants, in any period. Purchases from our ten largest end-customers accounted for 33% and 38% of our total revenue for the first half of 2019 and 2018, respectively. Sales to these large end-customers have typically been characterized by large but irregular purchases with long sales cycles. The timing of these purchases and the delivery of the purchased products are difficult to predict. Consequently, any acceleration or delay in anticipated product purchases by or deliveries to our largest customers could materially impact our revenue and operating results in any quarterly period. This may cause our quarterly revenue and operating results to fluctuate from quarter to quarter and make them difficult to predict.

As of June 30, 2019, we had $36.8 million of cash and cash equivalents and $82.5 million of marketable securities. Cash used in operating activities was $10.6 million in the first half of 2019 compared to $2.6 million cash used in operating activities in the same period of last year.

We intend to continue to invest for long-term growth. We have invested and expect to continue to invest in our product development efforts to deliver new products and additional features in our current products to address customer needs. In addition, we may expand our global sales and marketing organizations, expand our distribution channel partner programs and increase awareness of our solutions on a global basis. Our investments in growth in these areas may affect our short-term profitability.

Recent Developments

As previously disclosed, on July 26, 2019, we entered into a letter agreement with VIEX Capital Advisors, LLC (“VIEX”), certain entities affiliated with VIEX, and Eric Singer. Pursuant to the letter agreement, we increased the size of the board of directors (the “Board”) to six directors and appointed Mr. Singer to serve as a director, effective July 26, 2019. Mr. Singer was also appointed to the Board’s Compensation, Nominating and Corporate Governance and Strategy Committees. VIEX and certain of its affiliated entities have agreed to customary “standstill” provisions that will expire at 11:59 p.m., Pacific time, on the day that is 15 business days prior to the deadline for the submission of stockholder nominations of directors and business proposals for our 2020 Annual Meeting of Stockholders.

On July 30, 2019, we announced the planned retirement of Lee Chen, our president and chief executive officer. The Board has formed a search committee and retained an executive search firm for the purpose of recruiting and exploring

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potential chief executive officer candidates. Upon the appointment of a successor, Mr. Chen will resign as president and chief executive officer.

On July 30, 2019, we also announced the formation of a Strategy Committee of the Board consisting of Mr. Singer and existing directors Peter Chung and Tor Braham. The Strategy Committee is tasked and empowered with overseeing and executing specific activities directed to increasing shareholder value. In furtherance of these activities, we have retained Bank of America Merrill Lynch to advise us and the Board on strategic matters, including a near term exploration of a potential sale or change of control transaction. No assurance can be given that such a transaction will be consummated in the near term or at all.

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Results of Operations

A summary of our condensed consolidated statements of operations for the three and six months ended June 30, 2019 and 2018 is as follows (dollars in thousands):

	Three Months Ended June 30,
	2019					2018					Increase (Decrease)
	Amount			Percent of Total Revenue		Amount			Percent of Total Revenue		Amount			Percent
Revenue:
Products	$	26,785		54.5	%	$	39,224		64.6	%	$	(12,439	)	(31.7	)%
Services	22,404			45.5		21,489			35.4		915			4.3
Total revenue	49,189			100.0		60,713			100.0		(11,524		)	(19.0	)
Cost of revenue:
Products	6,891			14.0		9,080			14.9		(2,189		)	(24.1	)
Services	4,380			8.9		4,107			6.8		273			6.6
Total cost of revenue	11,271			22.9		13,187			21.7		(1,916		)	(14.5	)
Gross profit	37,918			77.1		47,526			78.3		(9,608		)	(20.2	)
Operating expenses:
Sales and marketing	23,626			48.0		25,788			42.6		(2,162		)	(8.4	)
Research and development	14,617			29.7		15,572			25.6		(955		)	(6.1	)
General and administrative	6,099			12.4		9,858			16.2		(3,759		)	(38.1	)
Total operating expenses	44,342			90.1		51,218			84.4		(6,876		)	(13.4	)
Loss from operations	(6,424		)	(13.1	)	(3,692		)	(6.1	)	(2,732		)	74.0
Non-operating income (expense):
Interest expense	(37		)	(0.1	)	(32		)	(0.1	)	(5		)	15.6
Interest and other income (expense), net	776			1.6		(429		)	(0.6	)	1,205			280.9
Total non-operating income (expense), net	739			1.5		(461		)	(0.7	)	1,200			260.3
Loss before income taxes	(5,685		)	(11.6	)	(4,153		)	(6.8	)	(1,532		)	36.9
Provision for income taxes	86			0.2		379			0.7		(293		)	(77.3	)
Net loss	$	(5,771	)	(11.7	)%	$	(4,532	)	(7.5	)%	$	(1,239	)	27.3	%

.

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	Six Months Ended June 30,
	2019					2018					Increase (Decrease)
	Amount			Percent of Total Revenue		Amount			Percent of Total Revenue		Amount			Percent
Revenue:
Products	$	55,015		55.3	%	$	67,373		61.3	%	$	(12,358	)	(18.3	)%
Services	44,464			44.7		42,523			38.7		1,941			4.6
Total revenue	99,479			100.0		109,896			100.0		(10,417		)	(9.5	)
Cost of revenue:
Products	14,407			14.5		16,189			14.7		(1,782		)	(11.0	)
Services	9,114			9.2		8,882			8.1		232			2.6
Total cost of revenue	23,521			23.6		25,071			22.8		(1,550		)	(6.2	)
Gross profit	75,958			76.4		84,825			77.2		(8,867		)	(10.5	)
Operating expenses:
Sales and marketing	48,109			48.4		52,692			48.0		(4,583		)	(8.7	)
Research and development	30,783			30.9		34,369			31.3		(3,586		)	(10.4	)
General and administrative	14,457			14.5		21,452			19.5		(6,995		)	(32.6	)
Total operating expenses	93,349			93.8		108,513			98.8		(15,164		)	(14.0	)
Loss from operations	(17,391		)	(17.5	)	(23,688		)	(21.6	)	6,297			(26.6	)
Non-operating income (expense):
Interest expense	(192		)	(0.2	)	(65		)	(0.1	)	(127		)	195.4
Interest and other income (expense), net	143			0.1		137			0.2		6			4.4
Total non-operating income (expense), net	(49		)	—		72			0.1		(121		)	(168.1	)
Loss before income taxes	(17,440		)	(17.5	)	(23,616		)	(21.5	)	6,176			(26.2	)
Provision for income taxes	603			0.6		586			0.5		17			2.9
Net loss	$	(18,043	)	(18.1	)%	$	(24,202	)	(22.0)%		$	6,159		(25.4	)%

Revenue

Our products revenue primarily consists of revenue from sales of our hardware appliances upon which our software is installed. Such software includes our ACOS software platform plus one or more of our ADC, CGN, TPS, SSLi or CFW solutions. Purchase of a hardware appliance includes a perpetual license to the included software. We recognize products revenue upon transfer of control, generally at the time of shipment, provided that all other revenue recognition criteria have been met. As a percentage of revenue, our products revenue may vary from quarter to quarter based on, among other things, the timing of orders and delivery of products, cyclicality and seasonality, changes in currency exchange rates and the impact of significant transactions with unique terms and conditions.

We generate services revenue from sales of post contract support (“PCS”), which is bundled with sales of products and professional services. We offer tiered PCS services under renewable, fee-based PCS contracts, primarily including technical support, hardware repair and replacement parts, and software upgrades on a when-and-if-available basis. We recognize services revenue ratably over the term of the PCS contract, which is typically one year, but can be up to five years.

A summary of our total revenue is as follows (dollars in thousands):

	Three Months Ended June 30,
	2019				2018				Increase (Decrease)
	Amount		Percent of Total Revenue		Amount		Percent of Total Revenue		Amount			Percent
Revenue:
Products	$	26,785	54	%	$	39,224	65	%	$	(12,439	)	(32	)%
Services	22,404		46		21,489		35		915			4
Total revenue	$	49,189	100	%	$	60,713	100	%	$	(11,524	)	(19	)%
Revenue by geographic region:
United States	$	15,278	31	%	$	30,443	50	%	$	(15,165	)	(50	)%
Japan	14,894		30		11,868		20		3,026			25
Asia Pacific, excluding Japan	9,213		19		10,667		18		(1,454		)	(14	)
EMEA	6,570		13		5,420		9		1,150			21
Other	3,234		7		2,315		3		919			40
Total revenue	$	49,189	100	%	$	60,713	100	%	$	(11,524	)	(19	)%

	Six Months Ended June 30,
	2019				2018				Increase (Decrease)
	Amount		Percent of Total Revenue		Amount		Percent of Total Revenue		Amount			Percent
Revenue:
Products	$	55,015	55	%	$	67,373	61	%	$	(12,358	)	(18	)%
Services	44,464		45		42,523		39		1,941			5
Total revenue	$	99,479	100	%	$	109,896	100	%	$	(10,417	)	(9	)%
Revenue by geographic region:
United States	$	33,378	34	%	$	51,121	47	%	$	(17,743	)	(35	)%
Japan	28,046		28		24,948		23		3,098			12
Asia Pacific, excluding Japan	17,989		18		18,105		16		(116		)	(1	)
EMEA	13,799		14		11,919		11		1,880			16
Other	6,267		6		3,803		3		2,464			65
Total revenue	$	99,479	100	%	$	109,896	100	%	$	(10,417	)	(9	)%

Total revenue decreased by $11.5 million, or 19%, during the second quarter of 2019 compared to the same period of 2018. This decrease was due primarily to a $15.2 million decrease in revenue in the United States, which was primarily driven by lower demand from our web giant and service provider customers. This decrease was partially offset by a $3.0 million increase in revenue in Japan due to higher demand from our web giant customers.

Total revenue decreased by $10.4 million, or 9%, during the first half of 2019 compared to the same period of 2018.

This decrease was due to a $17.7 million decrease in revenue in the United States, partially offset by a $3.1 million increase in revenue in Japan, and $2.5 million increase in other revenue primarily from Latin America.

Products revenue decreased $12.4 million, or 32%, during the second quarter of 2019 compared to the same period of 2018 primarily driven by lower demand from customers in the United States, partially offset by higher demand from our customers in Japan. Product revenue decreased $12.4 million, or 18%, in the first half of 2019 compared to the same period of 2018 primarily driven by lower demand from customers in the United States, partially offset by the increase in demand from our customers in Japan.

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Services revenue increased $0.9 million, or 4%, during the second quarter of 2019 compared to the same period of 2018. Services revenue increased $1.9 million, or 5%, in the first half of 2019 compared to the same period of 2018. The increases were primarily attributable to the increase in PCS sales from our increased installed customer base.

During the second quarter of 2019, $15.3 million, or 31% of total revenue, was generated from the United States, which represents a 50% decrease compared to the same period of 2018. The decrease in the second quarter of 2019 was primarily due to lower products revenue driven by lower demand from our web giant customers in the United States. During the first half of 2019, $33.4 million, or 34% of total revenue was generated from the United States, which represents a 35% decrease compared to the same period of last year. The decrease was primarily driven by lower product revenue due to the transformation of our sales organization and lower demand from our web giant customers in the United States.

During the second quarter of 2019, $14.9 million, or 30% of total revenue, was generated from Japan, which represents a 25% increase compared to the same period of 2018. The increase in the second quarter of 2019 was driven primarily by increased product revenue from our web giant customers in Japan. During the first half of 2019, $28.0 million, or 28% of total revenue, was generated from Japan, which represents a 12% increase compared to the same period of last year. The increase was driven primarily by increased product revenue from our web giant customers in Japan.

During the second quarter of 2019, $9.2 million, or 19% of total revenue, was generated from Asia Pacific regions excluding Japan, which represents a 14% decrease compared to the same period of 2018. The decrease in the second quarter of 2019 was driven primarily by lower service provider revenue, partially offset by higher products revenue and higher revenue from our web giant customers. During the first half of 2019, $18.0 million, or 18% of total revenue, was generated from Asia Pacific regions excluding Japan, which remained relatively consistent compared to the same period of last year.

During the second quarter of 2019, $6.6 million, or 13% of total revenue, was generated from EMEA, which represents a 21% increase compared to the same period of 2018. The increase in the second quarter of 2019 was driven primarily by higher products revenue and higher services revenue from service providers. During the first half of 2019, $13.8 million, or 14% of total revenue, was generated from EMEA, which represents a 16% increase compared to the same period of 2018.

During the second quarter of 2019, $3.2 million, or 7% of total revenue, was generated from other regions, primarily Latin America, which represents a 40% increase compared to the same period of 2018. The increase in the second quarter of 2019 was driven by higher products revenue and higher services revenue from service provider and enterprise customers. During the first half of 2019, $6.3 million, or 6% of total revenue, was generated from Latin America, which represents a 65% increase compared to the same period of 2018.

Cost of Revenue, Gross Profit and Gross Margin

Cost of revenue

Cost of products revenue is primarily comprised of cost of third-party manufacturing services and cost of inventory for the hardware component of our products. Cost of products revenue also includes warehouse personnel costs, shipping costs, inventory write-downs, certain allocated facilities and information technology infrastructure costs, and expenses associated with logistics and quality control.

Cost of services revenue is primarily comprised of personnel costs for our technical support, training and professional service teams. Cost of services revenue also includes the costs of inventory used to provide hardware replacements to end- customers under PCS contracts and certain allocated facilities and information technology infrastructure costs.

A summary of our cost of revenue is as follows (dollars in thousands):

	Three Months Ended June 30,				Increase (Decrease)
	2019		2018		Amount			Percent
Cost of revenue:
Products	$	6,891	$	9,080	$	(2,189	)	(24.1	)%
Services	4,380		4,107		273			6.6
Total cost of revenue	$	11,271	$	13,187	$	(1,916	)	(14.5	)%

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	Six Months Ended June 30,				Increase (Decrease)
	2019		2018		Amount			Percent
Cost of revenue:
Products	$	14,407	$	16,189	$	(1,782	)	(11.0	)%
Services	9,114		8,882		232			2.6
Total cost of revenue	$	23,521	$	25,071	$	(1,550	)	(6.2	)%

Gross Margin

Gross margin may vary and be unpredictable from period to period due to a variety of factors. These may include the mix of revenue from each of our regions, the mix of our products sold within a period, discounts provided to customers, inventory write-downs and foreign currency exchange rates.

Our sales are generally denominated in U.S. dollars; however, in Japan, our sales are denominated in Japanese yen. Any of the factors noted above can generate either a favorable or unfavorable impact on gross margin. A summary of our gross profit and gross margin is as follows (dollars in thousands):

	Three Months Ended June 30,
	2019				2018				Increase (Decrease)
	Amount		Gross Margin		Amount		Gross Margin		Amount			Gross Margin
Gross profit:
Products	$	19,894	74.3	%	$	30,144	76.9	%	$	(10,250	)	(2.6	)%
Services	18,024		80.4		17,382		80.9		642			(0.5	)
Total gross profit	$	37,918	77.1	%	$	47,526	78.3	%	$	(9,608	)	(1.2	)%

	Six Months Ended June 30,
	2019				2018				Increase (Decrease)
	Amount		Gross Margin		Amount		Gross Margin		Amount			Gross Margin
Gross profit:
Products	$	40,608	73.8	%	$	51,184	76.0	%	$	(10,576	)	(2.2	)%
Services	35,350		79.5		33,641		79.1		1,709			0.4
Total gross profit	$	75,958	76.4	%	$	84,825	77.2	%	$	(8,867	)	(0.8	)%

Products gross margin decreased 2.6% points during the second quarter of 2019 compared to the same period of 2018, primarily driven by pricing incentives on select strategic opportunities. Product gross margin decreased 2.2% points in the first half of 2019 compared to the same period of last year due to changes in product and geographic mix.

Services gross margin remained relatively unchanged for the second quarter and first half of 2019 compared to the same periods of 2018.

Operating Expenses

Our operating expenses consist of sales and marketing, research and development, general and administrative and litigation and settlement expenses. The largest component of our operating expenses is personnel costs which consist of wages, benefits, bonuses, and, with respect to sales and marketing expenses, sales commissions. Personnel costs also include stock-based compensation.

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A summary of our operating expenses is as follows (dollars in thousands):

	Three Months Ended June 30,				Increase (Decrease)
	2019		2018		Amount			Percent
Operating expenses:
Sales and marketing	$	23,626	$	25,788	$	(2,162	)	(8.4	)%
Research and development	14,617		15,572		(955		)	(6.1	)
General and administrative	6,099		9,858		(3,759		)	(38.1	)
Total operating expenses	$	44,342	$	51,218	$	(6,876	)	(13.4	)%
	Six Months Ended June 30,				Increase (Decrease)
	2019		2018		Amount			Percent
Operating expenses:
Sales and marketing	$	48,109	$	52,692	$	(4,583	)	(8.7	)%
Research and development	30,783		34,369		(3,586		)	(10.4	)
General and administrative	14,457		21,452		(6,995		)	(32.6	)
Total operating expenses	$	93,349	$	108,513	$	(15,164	)	(14.0	)%

Sales and Marketing

Sales and marketing expenses are our largest functional category of operating expenses and primarily consist of personnel costs. Sales and marketing expenses also include the cost of marketing programs, trade shows, consulting services, promotional materials, demonstration equipment, depreciation and certain allocated facilities and information technology infrastructure costs.     

The decrease in sales and marketing expense for the second quarter of 2019 compared to the same period of 2018 was primarily attributable to a decrease in employee headcount resulting in a decrease of $3.1 million in salaries and sales commissions, partially offset by a $1.1 million increase in stock-based compensation expense due to an increase in equity award grants in the second quarter of 2019 following the suspension of our equity plans during the second quarter of 2018.

The decrease in sales and marketing expense for the first half of 2019 compared to the same period of 2018 was

primarily due to a decrease in employee headcount resulting in a decrease of $3.3 million in salaries and sales commissions, and a $1.6 million decrease in stock-based compensation related to our ESPP in the first half of 2019, which was suspended in March 2018 and resulted in the recognition of accelerated unrecognized stock-based compensation expense in the first quarter of 2018.

We expect sales and marketing expenses to be relatively consistent quarter over quarter for the remainder of 2019.

Research and Development

Research and development efforts are focused on new product development and on developing additional functionality for our existing products. These expenses primarily consist of personnel costs, and, to a lesser extent, prototype materials, depreciation and certain allocated facilities and information technology infrastructure costs. We expense research and development costs as incurred.

The decrease in research and development expense for the second quarter of 2019 compared to the same period of 2018 was primarily driven by a $1.7 million decrease in salaries and bonus, partially offset by $0.7 million increased stock-based compensation expense due to an increase in equity award grants in the second quarter of 2019 following the suspension of our equity plans during the second quarter of 2018.

The decrease in research and development expense for the first half of 2019 compared to the same period of 2018 was

primarily due to a $2.4 million decrease in employee salaries and bonus and a $1.4 million decrease primarily in ESPP related stock-based compensation expense. Our ESPP was suspended in March 2018 due to the delay of the filing of our Annual Report on Form 10-K filing for the fiscal year ended December 31, 2017. Accordingly, all the remaining unrecognized stock-

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based compensation expense related to our ESPP was recognized in the first quarter of 2018. See Note 7 in the Notes to Condensed Consolidated Financial Statements in Part I, Item 1 of this report for additional information.

We expect research and development expenses to be relatively consistent quarter over quarter for the remainder of 2019.

General and Administrative

General and administrative expenses primarily consist of personnel costs, professional services and office expenses. General and administrative personnel costs include executive, finance, human resources, information technology, facility and legal related expenses. Professional services primarily consist of fees for outside accounting, tax, external legal counsel (including litigation), recruiting and other administrative services.

The decrease in general and administrative expenses for the second quarter of 2019 compared to the same period of 2018 was primarily driven by a decrease of $2.6 million in internal investigation related fees. The decrease in general and administrative expenses for the first half of 2019 compared to the same period of 2018 was primarily driven by a decrease of $5.7 million in internal investigation related fees we incurred in 2018.

We expect general and administrative expenses to be relatively consistent quarter over quarter for the remainder of 2019.

Interest Expense

Interest expense consists primarily of interest expense and amortization of debt issuance costs. At June 30, 2019, we had no outstanding balances on our credit facility. We expect to continue to incur commitment fees associated with the undrawn balance of our credit facility. If we choose to draw down on the credit facility, at such time, we would reduce the commitment fees accrued and increase the interest on outstanding balances.

Interest expense was immaterial for the second quarter and first half of 2019 and for the same periods of 2018.

Interest and Other Income (Expense), Net

Interest income consists primarily of interest income earned on our cash and cash equivalents and marketable securities. Other income (expense) consists primarily of foreign currency exchange gains and losses.

Interest and other income (expense), net, had a favorable change of $1.2 million, or 280.9%, for the second quarter of 2019 compared to the same period of 2018 primarily driven by a $1.0 million foreign exchange loss in the second quarter of 2018, and a $0.2 million increase in interest income in the second quarter of 2019 compared to the same period of 2018.

Interest and other income (expense), net, was immaterial and remained relatively consistent for the first half of 2019 compared to the same period of 2018.

Provision for Income Taxes

We recorded an income tax provision of $0.1 million and $0.4 million for the three months ended June 30, 2019 and 2018, respectively, and $0.6 million for each of the six months ended June 30, 2019 and 2018, which primarily consisted of foreign taxes. Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the carrying amounts of existing assets and liabilities in the financial statements and their respective tax bases using tax rates expected to be in effect during the years in which the basis differences reverse.

We currently maintain a valuation allowance on federal and state deferred tax assets, and we will continue to maintain a valuation allowance against all of our U.S. and certain foreign deferred tax assets until there is sufficient evidence to support the reversal of all or some portion of this allowance.

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Liquidity and Capital Resources

As of June 30, 2019, we had cash and cash equivalents of $36.8 million, including $7.1 million held outside the United States in our foreign subsidiaries, and $82.5 million of marketable securities. We currently do not have any plans to repatriate our earnings from our foreign operations. As of June 30, 2019, we had working capital of $113.3 million, accumulated deficit of $290.3 million and total stockholders’ equity of $98.3 million.

We believe that our existing cash and cash equivalents, marketable securities and other available financial resources will be sufficient to meet our anticipated cash needs for at least the next 12 months. Our future capital requirements will depend on many factors, including our growth rate, the expansion of sales and marketing activities, the timing and extent of spending to support development efforts, the introduction of new and enhanced product and service offerings and the continuing market acceptance of our products. In the event that additional financing is required from outside sources, we may not be able to raise such financing on terms acceptable to us or at all. If we are unable to raise additional capital when desired, our business, operating results and financial condition could be adversely affected.

As described in Note 6 in the Notes to the Condensed Consolidated Financial Statements in in Part I, Item 1 of this report, we are currently, or from time to time, involved in ongoing litigation. Any adverse settlements or judgments in any litigation could have a material adverse impact on our results of operations, cash balances and cash flows in the period in which such events occur.

Credit Agreements

In November 2016, we entered into the 2016 Credit Facility with Silicon Valley Bank (“SVB”) as the lender. The 2016 Credit Facility provides a three-year, $25.0 million revolving credit facility, which includes a maximum of $25.0 million letter of credit subfacility. When the balance of our cash, cash equivalents and marketable securities minus outstanding revolving loans and letters of credit equals or exceeds $50.0 million, loans may be advanced under the 2016 Credit Facility up to the full $25.0 million. When the balance of our cash, cash equivalents and marketable securities minus outstanding revolving loans and letters of credit falls below $50.0 million, loans may be advanced under the 2016 Credit Facility based on a borrowing base equal to a specified percentage of the value of our eligible accounts receivable. The loans bear interest, at our option, at (i) the prime rate reported in The Wall Street Journal, minus 0.50% or (ii) a LIBOR rate determined in accordance with the 2016 Credit Facility, plus 2.50%.

In September 2018, we entered into an amendment with SVB to reduce the unused revolving line facility fee on the 2016 Credit Facility from 0.4% to 0.3%.

Our obligations under the 2016 Credit Facility are secured by substantially all of our assets, excluding our intellectual property. The 2016 Credit Facility contains customary affirmative and negative covenants, in each case subject to customary exceptions, and customary events of default. In addition, the 2016 Credit Facility requires us to maintain compliance with an adjusted quick ratio of not less than 1.50:1.00, as determined in accordance with the 2016 Credit Facility. As of June 30, 2019, we had no outstanding balance under the 2016 Credit Facility and were in compliance with all facility covenants.

Statements of Cash Flows

The following table summarizes our cash flow related activities (in thousands):

	Six Months Ended June 30,
	2019			2018
Cash (used in) provided by:
Operating activities	$	(10,585	)	$	(2,570	)
Investing activities	3,524			(4,647		)
Financing activities	3,258			1,217
Net decrease in cash and cash equivalents	$	(3,803	)	$	(6,000	)

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Cash Flows from Operating Activities

Our cash provided by operating activities is driven primarily by sales of our products and management of working capital investments. Our primary uses of cash from operating activities have been for personnel-related expenditures, manufacturing costs, marketing and promotional expenses and costs related to our facilities. Our cash flows from operating activities will continue to be affected principally by the extent to which we increase spending on our business and our working capital requirements.

During the six months ended June 30, 2019, cash used in operating activities was $10.6 million, consisting of a net loss of $18.0 million which includes non-cash charges of $13.5 million and a cash decrease resulting from the net change in operating assets and liabilities of $6.0 million. Our non-cash charges consisted primarily of depreciation and amortization expenses of $5.0 million and stock-based compensation expense of $8.8 million. The net change in our operating assets and liabilities primarily reflects outflows from the changes in accrued and other liabilities of $9.4 million and inventory of $5.0 million, partially offset by an inflow from the changes in accounts receivable of $8.8 million.

The favorable change in accounts receivable was attributed to timing of cash collections. The unfavorable change in accrued and other liabilities was primarily due to the overall decrease in our accrued compensation. The unfavorable change in inventory was due to the timing of shipments.

During the six months ended June 30, 2018, cash used in operating activities was $2.6 million, consisting of a net loss of $24.2 million which includes our internal investigation charges of $7.3 million, non-cash charges of $14.6 million and a cash increase resulting from the net change in operating assets and liabilities of $7.0 million. Our non-cash charges consisted primarily of stock-based compensation expense of $10.7 million and depreciation and amortization expenses of $4.1 million. The net change in our operating assets and liabilities primarily reflects an inflow from the changes in deferred revenue of $7.4 million, accrued liabilities of $3.2 million and inventory of $2.0 million, offset primarily by an outflow from the changes in accounts payable of $3.0 million and accounts receivable of $1.9 million.

The favorable change in deferred revenue was primarily driven by the increased sales in product subscriptions and support services. The favorable change in accrued liabilities was primarily driven by higher royalty accrual related to our increased sales of security solutions and higher legal fees accrual due to our internal investigation as we previously disclosed, offset in part by the decrease in our ESPP related accrual. Our ESPP was suspended in March 2018 due to our non-timely filing status at that time. The favorable change in inventory was due to our improved inventory management. The decrease in accounts payable was primarily driven by the timing of vendor invoice payments. The unfavorable change in accounts receivable was attributed to the increased sales in our second quarter.

Cash Flows from Investing Activities

During the six months ended June 30, 2019, cash provided by investing activities was $3.5 million, consisting of proceeds from sales and maturities of marketable securities of $35.4 million, partially offset by purchases of marketable securities of $29.6 million and purchases of property and equipment of $2.3 million.

During the six months ended June 30, 2018, cash used in investing activities was $4.6 million, consisting of purchases of property and equipment of $1.3 million, marketable securities of $46.9 million and investment of $1.0 million, partially offset by proceeds from sales and maturities of marketable securities of $44.5 million.

Cash Flows from Financing Activities

During the six months ended June 30, 2019 and 2018, cash provided by financing activities was $3.3 million and $1.2 million, primarily consisting of proceeds from common stock issuances under our equity incentive plans.

Contractual Obligations

Our contractual obligations consist of capital leases, operating leases, purchase commitments and other contractual obligations.

On May 2, 2019 (the “Effective Date”), we entered into a sublease agreement (the “Sublease”) with Marvell Semiconductor, Inc. (“Sublandlord”) for corporate office space located at 2300 Orchard Parkway, San Jose, California, 95131 (the “Premises”). We intend to use the premises as a corporate office space and for research and development purposes. The term of the Sublease is seven years and eight months from the earlier of (i) December 1, 2019 or (ii) the date we commence

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business operations at the Premises. The Sublease provides for monthly base rent of approximately $262,000 per month for the first year with annual increases thereafter. The total base rent through the end of the term of the Sublease is approximately $26.4 million. In addition to base rent, we will also be responsible for operating and other expenses.

There have been no additional material changes to these obligations outside the ordinary course of business during the six months ended June 30, 2019 as compared to the contractual obligations disclosed in the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K, as amended by Form 10-K/A, for the year ended December 31, 2018.

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Off-Balance Sheet Arrangements

As of June 30, 2019, we did not have any relationships with any unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities that would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Critical Accounting Policies and Estimates

Our condensed consolidated financial statements are prepared in accordance with U.S. GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, expenses and related disclosures. We evaluate our estimates and assumptions on an ongoing basis. Our estimates are based on historical experience and various other assumptions that we believe to be reasonable under the circumstances. Our actual results could differ from these estimates.

Except for the accounting policies for leases that were updated as a result of adopting ASC Topic 842, there have been no significant changes in our critical accounting policies and estimates during the six months ended June 30, 2019 compared to the critical accounting policies and estimates disclosed in MD&A of our Annual Report on Form 10-K, as amended by Form 10-K/A, for the year ended December 31, 2018. See Note 1 in the Notes to Condensed Consolidated Financial Statements in Part I, Item 1 of this report for the summary of the new accounting policies under ASC Topic 842.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Foreign Currency Risk

Our consolidated results of operations, financial position and cash flows are subject to fluctuations due to changes in foreign currency exchange rates. Historically, the majority of our revenue contracts are denominated in U.S. dollars, with the most significant exception being Japan where we invoice primarily in Japanese yen. Our costs and expenses are generally denominated in the currencies where our operations are located, which is primarily in North America, Japan and, to a lesser extent, EMEA and the Asia Pacific region. In 2016, we initiated a hedging program with respect to foreign currency risk. Revenue resulting from selling in local currencies and costs and expenses incurred in local currencies are exposed to foreign currency exchange rate fluctuations, which can affect our revenue and operating income. As exchange rates vary, operating income may differ from expectations.

The functional currency of our foreign subsidiaries is the U.S. dollar. At the end of each reporting period, monetary assets and liabilities are remeasured to the functional currency using exchange rates in effect at the balance sheet date. Non-monetary assets and liabilities are remeasured at historical exchange rates. Gains and losses related to remeasurement are recorded in interest and other income (expense), net in the condensed consolidated statements of operations. A significant fluctuation in the exchange rates between our subsidiaries’ local currencies, especially the Japanese yen, British Pound and Euro, and the U.S. dollar could have an adverse impact on our consolidated financial position and results of operations.

We recorded $1.0 million foreign exchange loss during the six months ended June 30, 2019. The effect of a hypothetical 10% change in the exchange rate would not have a significant impact on our consolidated results of operations.

Interest Rate Sensitivity

Our exposure to interest rates risk relates to our 2016 Credit Facility with variable interest rates, where an increase in interest rates may result in higher borrowing costs. Since we have no outstanding borrowings under our 2016 Credit Facility as of June 30, 2019, the effect of a hypothetical 10% change in interest rates would not have any impact on our interest expense.

Our exposure to market risk for changes in interest rates relates primarily to our marketable securities. Our marketable securities are comprised of certificates of deposit, corporate securities, U.S. Treasury and agency securities, commercial paper and asset-backed securities. We do not enter into investments for trading or speculative purposes. At June 30, 2019, our investment portfolio included marketable securities with an aggregate fair market value and amortized cost basis of $82.5 million and $82.2 million, respectively.

The following table presents the hypothetical fair values of our marketable securities assuming immediate parallel shifts in the yield curve of 50 basis points (“BPS”), 100 BPS and 150 BPS as of June 30, 2019 (in thousands):

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							Fair Value as of
	(150 BPS)		(100 BPS)		(50 BPS)		6/30/2019		50 BPS		100 BPS		150 BPS
Marketable securities	$	83,191	$	82,953	$	82,716	$	82,478	$	82,241	$	82,003	$	81,766

ITEM 4. CONTROLS AND PROCEDURES

Management’s Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures as of June 30, 2019, as required by Rule 13a-15(b) under the Securities Exchange Act of 1934, or the Exchange Act. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by the company in the reports that it files or submits to the SEC, under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and financial officers, as appropriate to enable timely decisions regarding required disclosure.

In designing and evaluating our disclosure controls and procedures, our management recognizes that any disclosure controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that our management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Based on this evaluation, our Chief Executive Officer and Chief Financial Officer, as our principal executive officer and principal financial officer, respectively, concluded that our disclosure controls and procedures were not effective as of June 30, 2019, due to the material weaknesses in our internal controls over financial reporting described below. Notwithstanding the material weaknesses as of June 30, 2019, management has concluded that the condensed consolidated financial statements included in this Form 10-Q present fairly, in all material respects, and in conformity with U.S. GAAP our financial position, results of operations and cash flows for the periods presented.

Management’s Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act). Internal control over financial reporting consists of policies and procedures that:

• Pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company;

• Are designed and operated to provide reasonable assurance regarding the reliability of our financial reporting and our process for the preparation of financial statements for external purposes in accordance with generally accepted accounting principles and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and

• Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.

Our internal control over financial reporting is designed by, and under the supervision of our principal executive officer and principal financial officer and effected by our Board of Directors, management, and others. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with internal control policies or procedures may deteriorate.

Management has assessed the effectiveness of our internal control over financial reporting as of June 30, 2019, using the criteria set forth in the Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring

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Organizations of the Treadway Commission (“COSO”). A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

In connection with management’s assessment of our internal control over financial reporting described above, and as previously identified and disclosed in our Annual Report on Form 10-K, as amended by Form 10-K/A, for the year ended December 31, 2018, management identified deficiencies that constituted individually, or in the aggregate, material weaknesses in our internal control over financial reporting as of June 30, 2019 and December 31, 2018.

Material Weaknesses Identified

The Company previously disclosed material weaknesses in internal control over financial reporting as of December 31, 2017 in our Annual Report on Form 10-K for the year ended December 31, 2017. The material weaknesses relate to our control environment and monitoring activities and revenue recognition. The material weaknesses led to the restatement of our annual consolidated financial statements for the years ended December 31, 2016 and 2015. As described below, management has developed and implemented remediation actions to address the material weaknesses and further actions are ongoing as of June 30, 2019. Management has reported to the Audit Committee the status of these remediation actions. Further, the Company has not had sufficient time to test the effectiveness of the remediation actions. As a result, the material weaknesses continue to be present as of June 30, 2019. These control deficiencies could have resulted in other misstatements in financial statement accounts and disclosures that would result in a material misstatement to the annual or interim consolidated financial statements that might not have been prevented or detected.

Changes to Internal Control over Financial Reporting

Beginning January 1, 2019, we adopted ASC Topic 842, the new lease accounting standard. We implemented changes to our lease recognition policies, process and control activities to support the adoption of ASC Topic 842. Except in relation to our adoption of ASC Topic 842, no other change in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) occurred during the quarter ended June 30, 2019, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Remediation Actions Relating to Material Weaknesses in Internal Control over Financial Reporting

Management has implemented or is in the process of implementing various initiatives intended to address the identified material weaknesses and strengthen our overall internal control environment. Management has reported to the Audit Committee regarding its development and implementation of these remediation actions. In this regard, some of our key remedial initiatives include:

• Executive Management Communications to Reinforce Compliance - Our Chief Executive Officer and Chief Financial Officer, at the direction of our Board of Directors, have in communications to personnel continued to reinforce the importance of adherence to our policies and procedures regarding ethics and compliance and the importance of identifying misconduct and raising and communicating concerns.

• Changes to Our Executive Management and Sales Personnel - We have hired new personnel, who have enabled improved lines of communication across business functions to address areas of identified gaps in expertise.

• Training Practices - We initiated development of a comprehensive training program relating to revenue recognition and contract review and have begun to deploy elements of the training to our sales personnel.

• Credit Policies and Procedures - We evaluated our practices regarding extension of credit to customers and evaluation of customer creditworthiness. The improved practices have been implemented and we are in the process of testing the effectiveness of those practices.

• Revenue Recognition Policies and Procedures - We have evaluated our revenue recognition policies and procedures and are implementing improvements.

• Implementation and Enhancement of Entity Level Controls - We are implementing additional controls in our quarterly/annual financial reporting process, including enhanced sub-certifications by all sales personnel, as well as other key

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personnel in our finance, human resources, and legal functions. The enhanced sub-certifications include specific documentation related to the identification of non-standard revenue arrangements. We have also enhanced our insider trading policy and related communications to employees.

Our management has worked, and continues to work, to strengthen our internal control over financial reporting. We are committed to ensuring that such controls are designed and operating effectively. The identified material weaknesses will not be considered remediated until the applicable remedial controls operate for a sufficient period of time and management concludes, through testing, that these controls are operating effectively. As we continue to evaluate and improve our internal control over financial reporting, we may take additional measures to address control deficiencies or modify or change the proposed remediation measures described above.

Our Board of Directors and management take internal control over financial reporting and the integrity of our financial statements seriously and believe that the steps taken, and to be taken, to remediate the identified material weaknesses were and are essential steps to maintaining strong and effective internal control over financial reporting and a strong internal control environment.

Inherent Limitations on Effectiveness of Controls

Our management, including our principal executive officer and our principal financial officer, does not expect that our disclosure controls or our internal control over financial reporting will prevent or detect all error and all fraud. A control system, no matter how well-designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. The design of a control system must reflect the fact that there are resource constraints and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been detected. The design of any system of controls is based in part on certain assumptions about the likelihood of future events and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Projections of any evaluation of the effectiveness of controls to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See Note 6 in the Notes to the Condensed Consolidated Financial Statements regarding our legal proceedings.

ITEM 1A. RISK FACTORS

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of the other information contained in this report, and in our other public filings. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties that we are unaware of, or that we currently believe are not material, may also become important factors that affect us. If any of the following risks occur, our business, financial condition, operating results, and prospects could be materially harmed. In that event, the trading price of our common stock could decline, perhaps significantly.

We have identified deficiencies in our internal control over financial reporting that resulted in material weaknesses in our internal control over financial reporting and have concluded that our internal control over financial reporting was not effective as of December 31, 2018 and December 31, 2017. If we fail to properly remediate these or any future material weaknesses or deficiencies or to maintain proper and effective internal controls, material misstatements in our financial statements could occur and impair our ability to produce accurate and timely financial statements and could adversely affect investor confidence in our financial reports, which could negatively affect our business.

We were not able to assert in our Annual Reports on Form 10-K for the years ended December 31, 2018 and December 31, 2017, that our internal control over financial reporting was effective as of December 31, 2018 and December 31, 2017, due to the existence of material weaknesses in such controls, which continue to exist as of June 30, 2019, and we have also concluded that our disclosure controls and procedures were not effective as of June 30, 2019, December 31, 2018 and December 31, 2017, due to material weaknesses in our internal control over financial reporting. As described in Part I, Item 4, “Controls and Procedures” of this report, we have initiated remediation efforts to address the identified weaknesses. However, we cannot provide assurance that our remediation efforts will be adequate to allow us to conclude that such controls will be effective in the future. We also cannot assure you that additional material weaknesses in our internal control over financial reporting will not arise or be identified in the future. We intend to continue our control remediation activities and generally improve our internal controls. In doing so, we will continue to incur expenses and expend management time on compliance-related issues.

If our remediation measures are insufficient to address the identified deficiencies, or if additional deficiencies in our internal control over financial reporting are discovered or occur in the future, our consolidated financial statements may contain material misstatements and we could be required to restate our financial results. Moreover, because of the inherent limitations of any control system, material misstatements due to error or fraud may not be prevented or detected on a timely basis, or at all. If we are unable to provide reliable and timely financial reports in the future, our business and reputation may be further harmed. Restated financial statements and failures in internal controls may also cause us to fail to meet reporting obligations, negatively affect investor confidence in our management and the accuracy of our financial statements and disclosures, or result in adverse publicity and concerns from investors, any of which could have a negative effect on the price of our common stock, subject us to further regulatory investigations and penalties or stockholder litigation, and materially adversely impact our business and financial condition.

The Audit Committee’s investigation of certain accounting and internal control matters relating to our previously issued financial statements and the audit of our consolidated financial statements as of and for the year ended December 31, 2017 were time-consuming and expensive, and may result in additional expense.

We have incurred significant expenses, including audit, legal, consulting and other professional fees, in connection with the Audit Committee’s internal investigation, the review of our accounting, the audit of our 2017 financial statements and the ongoing remediation of deficiencies in our internal control over financial reporting. As described in Part I, Item 4, “Controls and Procedures,” of this report, we have taken a number of steps in order to strengthen our accounting function and attempt to reduce the risk of future recurrence and errors in accounting determinations. The validation of the efficacy of these remedial steps will result in us incurring near term expenses, and to the extent these steps are not successful, we could be required to incur significant additional time and expense. The incurrence of significant additional expense, or the requirement that

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management devote significant time that could reduce the time available to execute on our business strategies, could have a material adverse effect on our business, results of operations and financial condition.

Our failure to timely file periodic reports we are required to file under the Securities Exchange Act of 1934 could adversely affect the market for our common stock and make it more difficult for us to access the public markets to raise debt or equity capital.

We filed our Annual Report on Form 10-K for the year ended December 31, 2017 approximately five months after it was due. Because of the time required to complete and file that report, we also were unable to timely file our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2018 and June 30, 2018.

As a result of our inability to timely file our periodic reports under the Securities Exchange Act of 1934, we will not be eligible to use a registration statement on Form S-3 to conduct public offerings of our securities until we have timely filed all periodic reports with the SEC for a period of twelve months. Our inability to use Form S-3 during this time period may have a negative impact on our ability to access the public capital markets in a timely fashion because we would be required to file a long-form registration statement on Form S-1 and have it reviewed and declared effective by the SEC. This may limit our ability to access the public markets to raise debt or equity.

If we do not successfully anticipate market needs and opportunities or if the market does not continue to adopt our application networking products, our business, financial condition and results of operations could be significantly harmed.

The application networking market is rapidly evolving and difficult to predict. Technologies, customer requirements, security threats and industry standards are constantly changing. As a result, we must anticipate future market needs and opportunities and then develop new products or enhancements to our current products that are designed to address those needs and opportunities, and we may not be successful in doing so.

Even if we are able to anticipate, develop and commercially introduce new products and enhancements that address the market’s needs and opportunities, there can be no assurance that new products or enhancements will achieve widespread market acceptance. For example, organizations that use other conventional or first-generation application networking products for their needs may believe that these products are sufficient. In addition, as we launch new product offerings, organizations may not believe that such new product offerings offer any additional benefits as compared to the existing application networking products that they currently use. Accordingly, organizations may continue allocating their IT budgets for existing application networking products and may not adopt our products, regardless of whether our products can offer superior performance or security.

If we fail to anticipate market needs and opportunities or if the market does not continue to adopt our application networking products, then market acceptance and sales of our current and future application networking products could be substantially decreased or delayed, we could lose customers, and our revenue may not grow or may decline. Any of such events would significantly harm our business, financial condition and results of operations.

Our success depends on our timely development of new products and features to address rapid technological changes and evolving customer requirements. If we are unable to timely develop and successfully introduce new products and features that adequately address these changes and requirements, our business and operating results could be adversely affected.

Changes in application software technologies, data center and communications hardware, networking software and operating systems, and industry standards, as well as our end-customers’ continuing business growth, result in evolving application networking needs and requirements. Our continued success depends on our ability to identify, develop and introduce in a timely and successful manner, new products and new features for our existing products that meet these needs and requirements.

Our future plans include significant investments in research and development and related product opportunities. Developing our products and related enhancements is time-consuming and expensive. We have made significant investments in our research and development team in order to address these product development needs. Our investments in research and development may not result in significant design and performance improvements or marketable products or features, or may result in products that are more expensive than anticipated. We may take longer to generate revenue, or generate less revenue, than we anticipate from our new products and product enhancements. We believe that we must continue to dedicate a significant amount of resources to our research and development efforts to maintain our competitive position.

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If we are unable to develop new products and features to address technological changes and new customer requirements in the application networking or security markets or if our investments in research and development do not yield the expected benefits in a timely manner, our business and operating results could be adversely affected. For example, when the 5G standards are published, we may not be able to produce a satisfactory return on investment if our strategic vision and the resources that we are spending on developing our presence in the 5G technology industry turn out to be misaligned with such standards.

We have experienced net losses in recent periods and may not achieve or maintain profitability in the future. If we cannot achieve or maintain profitability, our financial performance will be harmed and our business may suffer.

We experienced net losses for the six months ended June 30, 2019 and for the years ended December 31, 2018 and 2017. We may not be able to increase our revenue growth or achieve profitability in the future or on a consistent basis. During the six months ended June 30, 2019 and the years ended December 31, 2018 and 2017, we have invested in our sales, marketing and research and development teams in order to develop, market and sell our products. We may continue to invest in these areas in the future. As a result of these expenditures, we may have to generate and sustain increased revenue, manage our cost structure and avoid significant liabilities to achieve future profitability.

Revenue growth may slow or decline, and we may incur significant losses in the future for a number of possible reasons, including our inability to develop products that achieve market acceptance, general economic conditions, increasing competition, decreased growth in the markets in which we operate, or our failure for any reason to capitalize on growth opportunities. Additionally, we may encounter unforeseen operating expenses, difficulties, complications, delays and other unknown factors that may result in losses in future periods. If these losses exceed our expectations or our revenue growth expectations are not met in future periods, our financial performance will be harmed and our stock price could be volatile or decline.

Our operating results have varied and are likely to continue to vary significantly from period to period and may be unpredictable, which could cause the trading price of our common stock to decline.

Our operating results, in particular, revenue, margins and operating expenses, have fluctuated in the past, and we expect this will continue, which makes it difficult for us to predict our future operating results. The timing and size of sales of our products are highly variable and difficult to predict and can result in significant fluctuations in our revenue from period to period. This is particularly true of sales to our largest end-customers, such as service providers, web giants and governmental organizations, who typically make large and concentrated purchases and for whom close or sales cycles can be long, as a result of their complex networks and data centers, as well as requests that may be made for customized features. Our quarterly results may vary significantly based on when these large end-customers place orders with us and the content of their orders.

 Our operating results may also fluctuate due to a number of other factors, many of which are outside of our control and may be difficult to predict. In addition to other risks listed in this “Risk Factors” section, factors that may affect our operating results include:

• fluctuations in and timing of purchases from, or loss of, large customers;

• the budgeting cycles and purchasing practices of end-customers;

• our ability to attract and retain new end-customers;

• changes in demand for our products and services, including seasonal variations in customer spending patterns or cyclical fluctuations in our markets;

• our reliance on shipments at the end of our quarters;

• variations in product mix or geographic locations of our sales, which can affect the revenue we realize for those sales;

• the timing and success of new product and service introductions by us or our competitors;

• our ability to increase the size of our distribution channel and to maintain relationships with important distribution channel partners;

• our ability to improve our overall sales productivity and successfully execute our marketing strategies;

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• the effect of currency exchange rates on our revenue and expenses;

• the cost and potential outcomes of existing and future litigation;

• expenses related to our facilities;

• the effect of discounts negotiated by our largest end-customers for sales or pricing pressure from our competitors;

• changes in the growth rate of the application networking or security markets or changes in market needs;

• inventory write downs, which may be necessary for our older products when our new products are launched and adopted by our end-customers; and

• our third-party manufacturers’ and component suppliers’ capacity to meet our product demand forecasts on a timely basis, or at all.

Any one of the factors above or the cumulative effect of some of these factors may result in significant fluctuations in our financial and other operating results. This variability and unpredictability could result in our failure to meet our or our investors’ or securities analysts’ revenue, margin or other operating results expectations for a particular period, resulting in a decline in the trading price of our common stock.

Reliance on shipments at the end of the quarter could cause our revenue for the applicable period to fall below expected levels.

As a result of end-customer buying patterns and the efforts of our sales force and distribution channel partners to meet or exceed their sales objectives, we have historically received a substantial portion of purchase orders and generated a substantial portion of revenue during the last few weeks of each quarter. We may be able to recognize such revenue in the quarter received, however, only if all of the requirements of revenue recognition are met by the end of the quarter. Any significant interruption in our information technology systems, which manage critical functions such as order processing, revenue recognition, financial forecasts, inventory and supply chain management, could result in delayed order fulfillment and thus decreased revenue for that quarter. If expected revenue at the end of any quarter is delayed for any reason, including the failure of anticipated purchase orders to materialize (including delays by our customers or potential customers in consummating such purchase orders), our third-party manufacturers’ inability to manufacture and ship products prior to quarter-end to fulfill purchase orders received near the end of the quarter, our failure to manage inventory to meet demand, our inability to release new products on schedule, any failure of our systems related to order review and processing, or any delays in shipments or achieving specified acceptance criteria, our revenue for that quarter could fall below our, or our investors’ or securities analysts’ expectations, resulting in a decline in the trading price of our common stock.

We face intense competition in our market, especially from larger, well-established companies, and we may lack sufficient financial or other resources to maintain or improve our competitive position.

The application networking and security markets are intensely competitive, and we expect competition to increase in the future. To the extent that we sell our solutions in adjacent markets, we expect to face intense competition in those markets as well. We believe that our main competitors fall into the following categories:

• Companies that sell products in the traditional ADC market, such as F5 Networks, Inc. (“F5 Networks”) and Citrix Systems, Inc. (“Citrix Systems”);

• Companies that sell open source, software-only, cloud-based ADC services, such as Avi Networks Inc. (“Avi Networks”), NGINX Inc. (“NGiNX”), and HAProxy Technologies, Inc. (“HAProxy”) as well as many startups;

• Companies that sell CGN products, which were originally designed for other networking purposes, such as edge routers and security appliances from vendors like Cisco Systems, Inc. (“Cisco Systems”), Juniper Networks, Inc. (“Juniper Networks”) and Fortinet, Inc. (“Fortinet”);

• Companies that sell traditional DDoS protection products, such as Arbor Networks, Inc., a subsidiary of NetScout Systems, (“Arbor Networks”) and Radware, Ltd. (“Radware”);

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• Companies that sell SSL decryption and inspection products, such as Symantec Corporation (through its acquisition of Blue Coat Systems Inc. in 2016) and F5 Networks; and

• Companies that sell certain network security products, including Secure Web Gateways, SSL Insight/SSL Intercept, data center firewalls and Office 365 proxy solutions.

Many of our competitors are substantially larger and have greater financial, technical, research and development, sales and marketing, manufacturing, distribution and other resources and greater name recognition. In addition, some of our larger competitors have broader products offerings and could leverage their customer relationships based on their other products. Potential customers who have purchased products from our competitors in the past may also prefer to continue to purchase from these competitors rather than change to a new supplier regardless of the performance, price or features of the respective products. We could also face competition from new market entrants, which may include our current technology partners. As we continue to expand globally, we may also see new competitors in different geographic regions. Such current and potential competitors may also establish cooperative relationships among themselves or with third parties that may further enhance their resources.

Many of our existing and potential competitors enjoy substantial competitive advantages, such as:

• longer operating histories;

• the capacity to leverage their sales efforts and marketing expenditures across a broader portfolio of products and services at a greater range of prices including through selling at zero or negative margins;

• the ability to incorporate functionality into existing products to gain business in a manner that discourages users from purchasing our products, including through product bundling or closed technology platforms;

• broader distribution and established relationships with distribution channel partners in a greater number of worldwide locations;

• access to larger end-customer bases;

• the ability to use their greater financial resources to attract our research and development engineers as well as other employees of ours;

• larger intellectual property portfolios; and

• the ability to bundle competitive offerings with other products and services.

Our ability to compete will depend upon our ability to provide a better solution than our competitors at a competitive price. We may be required to make substantial additional investments in research and development, marketing and sales in order to respond to competition, and there is no assurance that these investments will achieve any returns for us or that we will be able to compete successfully in the future. We also expect increased competition if our market continues to expand. Moreover, conditions in our market could change rapidly and significantly as a result of technological advancements or other factors.

In addition, current or potential competitors may be acquired by third parties that have greater resources available. As a result of these acquisitions, our current or potential competitors might take advantage of the greater resources of the larger organization to compete more vigorously or broadly with us. In addition, continued industry consolidation might adversely impact end-customers’ perceptions of the viability of smaller and even medium-sized networking companies and, consequently, end-customers’ willingness to purchase from companies like us.

As a result, increased competition could lead to fewer end-customer orders, price reductions, reduced margins and loss of market share.

Cloud-based computing trends present competitive and execution risks.

We are experiencing an industry-wide trend of customers considering transitioning from purely on-premise network architectures to a computing environment that may utilize a mixture of existing solutions and various new cloud-based solutions. Concurrently with this transition, pricing and delivery models are also evolving. Many companies in our industry,

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including some of our competitors, are developing and deploying cloud-based solutions for their customers. In addition, the emergence of new cloud infrastructures may enable new companies to compete with our business. These new competitors may include large cloud providers who can provide their own ADC functionality as well as smaller companies targeting applications that are developed exclusively for delivery in the cloud. We are dedicating significant resources to develop and offer our customers new cloud-based solutions. Also, some of our largest customers are cloud providers that utilize our existing solutions, and we believe that as cloud infrastructures continue to grow our existing solutions may provide benefits to other cloud providers. While we believe our expertise and dedication of resources to developing new cloud-based solutions, together with the benefits that our existing solutions offer cloud providers, represent advantages that provide us with a strong foundation to compete, it is uncertain whether our efforts to develop new cloud-based solutions or our efforts to market and sell our existing solutions to cloud providers will attract the customers or generate the revenue necessary to successfully compete in this new business model.  Nor is it clear when or in what manner this new business model will evolve, and this uncertainty may delay purchasing decisions by our customers or prospective customers. Whether we are able to successfully compete depends on our execution in a number of areas, including maintaining the utility, compatibility and performance of our software on the growing assortment of cloud computing platforms and the enhanced interoperability requirements associated with orchestration of cloud computing environments. Any failure to adapt to these evolving trends may reduce our revenue or operating margins and could have a material adverse effect on our business, results of operations and financial condition.

If we are unable to attract new end-customers, sell additional products to our existing end-customers or achieve the anticipated benefits from our investment in additional sales personnel and resources, our revenue may decline, and our gross margin will be adversely affected.

To maintain and increase our revenue, we must continually add new end-customers and sell additional products to existing end-customers. The rate at which new and existing end-customers purchase solutions depends on a number of factors, including some outside of our control, such as general economic conditions. If our efforts to sell our solutions to new end-customers and additional solutions to our existing end-customers are not successful, our business and operating results will suffer.

In certain recent periods, we have added personnel and other resources to our sales and marketing functions, as we focused on growing our business, entering new markets and increasing our market share. We may incur additional expenses by hiring additional sales and marketing personnel and expanding our international operations in order to seek revenue growth. The return on these and future investments may be lower, or may be realized more slowly, than we expect, if realized at all. If we do not achieve the benefits anticipated from these investments, or if the achievement of these benefits is delayed, our growth rates will decline, and our gross margin would likely be adversely affected.

If we are not able to maintain and enhance our brand and reputation, our business and operating results may be harmed in tangible or intangible ways.

We believe that maintaining and enhancing our brand and reputation are critical to our relationships with, and our ability to attract, new end-customers, technology partners and employees. The successful promotion of our brand will depend largely upon our ability to continue to develop, offer and maintain high-quality products and services, our marketing and public relations efforts, and our ability to differentiate our products and services successfully from those of our competitors. Our brand promotion activities may not be successful and may not yield increased revenue. In addition, extension of our brand to products and uses different from our traditional products and services may dilute our brand, particularly if we fail to maintain the quality of products and services in these new areas. We have in the past, and may in the future, become involved in litigation that could negatively affect our brand. If we do not successfully maintain and enhance our brand and reputation, our growth rate may decline, we may have reduced pricing power relative to competitors with stronger brands or reputations, and we could lose end-customers or technology partners, all of which would harm our business, operating results and financial condition.

A limited number of our end-customers, including service providers, make large and concentrated purchases that comprise a significant portion of our revenue. Any loss or delay of expected purchases by our largest end-customers could adversely affect our operating results.

As a result of the nature of our target market and the current stage of our development, a substantial portion of our revenue in any period comes from a limited number of large end-customers, including service providers. During the six months ended June 30, 2019 and the years ended December 31, 2018 and 2017, purchases from our ten largest end-customers accounted for approximately 33%, 37% and 35% of our total revenue, respectively. The composition of the group of these ten largest end-customers changes from period to period, but often includes service providers and web giants. During the six months ended June 30, 2019 and the years ended December 31, 2018 and 2017, service providers accounted for approximately

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43%, 43% and 47% of our total revenue, respectively, and web giants accounted for approximately 12%, 18% and 14% of our total revenue, respectively.

Sales to these large end-customers have typically been characterized by large but irregular purchases with long initial sales cycles. After initial deployment, subsequent purchases of our products typically have a more compressed sales cycle. The timing of these purchases and of the requested delivery of the purchased product is difficult to predict. As a consequence, any acceleration or delay in anticipated product purchases by or requested deliveries to our largest end-customers could materially affect our revenue and operating results in any quarter and cause our quarterly revenue and operating results to fluctuate from quarter to quarter.

We cannot provide any assurance that we will be able to sustain or increase our revenue from our largest end-customers nor that we will be able to offset any absence of significant purchases by our largest end-customers in any particular period with purchases by new or existing end-customers in that or a subsequent period. We expect that sales of our products to a limited number of end-customers will continue to contribute materially to our revenue for the foreseeable future. The loss of, or a significant delay or reduction in purchases by, a small number of end-customers could have a material adverse effect on our consolidated financial position, results of operations or cash flows.

Our business could be adversely impacted by changes demanded by our customers in the deployment and payment models for our products.

Our customers have traditionally demanded products deployed in physical, appliance-based on-premise data centers that are paid in full at the time of purchase and include perpetual licenses for our software products. While these products remain central to our business, new deployment and payment models are emerging in our industry that may provide some of our customers with additional technical, business agility and flexibility options. These new models include cloud-based applications provided as SaaS and software subscription licenses where license and service fees are ratable and correlate to the type of service used, the quantity of services consumed or the length of time of the subscription. These models have accounting treatments that may require us to recognize revenue ratably over an extended period of time. If a substantial portion of our customers transition from on-premise-based products to such cloud-based, consumption and subscription-based models, this could adversely affect our operating results and could make it more difficult to compare our operating results during such transition period with our historical operating results.

Some of our large end-customers demand favorable terms and conditions from their vendors and may request price or other concessions from us. As we seek to sell more products to these end-customers, we may agree to terms and conditions that may have an adverse effect on our business.

Some of our large end-customers have significant purchasing power and, accordingly, may request from us and receive more favorable terms and conditions, including lower prices than we typically provide. As we seek to sell products to this class of end-customer, we may agree to these terms and conditions, which may include terms that reduce our gross margin and have an adverse effect on our business.

Our gross margin may fluctuate from period to period based on the mix of products sold, the geographic location of our customers, price discounts offered, required inventory write downs and exchange rate fluctuations.

Our gross margin may fluctuate from period to period in response to a number of factors, such as the mix of our products sold and the geographic locations of our sales. Our products tend to have varying gross margins in different geographic regions. We also may offer pricing discounts from time to time as part of a targeted sales campaign or as a result of pricing pressure from our competitors. In addition, our larger end-customers may negotiate pricing discounts in connection with large orders they place with us. The sale of our products at discounted prices could have a negative impact on our gross margin. We also must manage our inventory of existing products when we introduce new products.

If we are unable to sell the remaining inventory of our older products prior to or following the launch of such new product offerings, we may be forced to write down inventory for such older products, which could also negatively affect our gross margin. Our gross margin may also vary based on international currency exchange rates. In general, our sales are denominated in U.S. dollars; however, in Japan they are denominated in Japanese yen. Changes in the exchange rate between the U.S. dollar and the Japanese yen may therefore affect our actual revenue and gross margin.

We have been, may presently be, or in the future may be, a party to litigation and claims regarding intellectual property rights, resolution of which has been and may in the future be time-consuming, expensive and adverse to us, as well as require a significant amount of resources to prosecute, defend, or make our products non-infringing.

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Our industry is characterized by the existence of a large number of patents and by increasingly frequent claims and related litigation based on allegations of infringement or other violations of patent and other intellectual property rights. In the ordinary course of our business, we have been and may presently be in disputes and licensing discussions with others regarding their patents and other claimed intellectual property and proprietary rights. Intellectual property infringement and misappropriation lawsuits and other claims are subject to inherent uncertainties due to the complexity of the technical and legal issues involved, and we cannot be certain that we will be successful in defending ourselves against such claims or in concluding licenses on reasonable terms or at all.

We may have fewer issued patents than some of our major competitors, and therefore may not be able to utilize our patent portfolio effectively to assert defenses or counterclaims in response to patent infringement claims or litigation brought against us by third parties. Further, litigation may involve patent holding companies or other adverse patent owners that have no relevant products revenue and against which our potential patents may provide little or no deterrence. In addition, many potential litigants have the capability to dedicate substantially greater resources than we can to enforce their intellectual property rights and to defend claims that may be brought against them. We expect that infringement claims may increase as the number of product types and the number of competitors in our market increases. Also, to the extent we gain greater visibility, market exposure and competitive success, we face a higher risk of being the subject of intellectual property infringement claims.

If we are found in the future to infringe the proprietary rights of others, or if we otherwise settle such claims, we could be compelled to pay damages or royalties and either obtain a license to those intellectual property rights or alter our products such that they no longer infringe. Any license could be very expensive to obtain or may not be available at all. Similarly, changing our products or processes to avoid infringing the rights of others may be costly, time-consuming or impractical. Alternatively, we could also become subject to an injunction or other court order that could prevent us from offering our products. Any of these claims, regardless of their merit, may be time-consuming, result in costly litigation and diversion of technical and management personnel, or require us to cease using infringing technology, develop non-infringing technology or enter into royalty or licensing agreements.

Many of our commercial agreements require us to indemnify our end-customers, distributors and resellers for certain third-party intellectual property infringement actions related to our technology, which may require us to defend or otherwise become involved in such infringement claims, and we could incur liabilities in excess of the amounts we have received for the relevant products and/or services from our end-customers, distributors or resellers. These types of claims could harm our relationships with our end-customers, distributors and resellers, may deter future end-customers from purchasing our products or could expose us to litigation for these claims. Even if we are not a party to any litigation between an end-customer, distributor or reseller, on the one hand, and a third party, on the other hand, an adverse outcome in any such litigation could make it more difficult for us to defend our intellectual property rights in any subsequent litigation in which we are a named party.

We may not be able to adequately protect our intellectual property, and if we are unable to do so, our competitive position could be harmed, or we could be required to incur significant expenses to enforce our rights.

We rely on a combination of patent, copyright, trademark and trade secret laws, and contractual restrictions on disclosure of confidential and proprietary information, to protect our intellectual property. Despite the efforts we take to protect our intellectual property and other proprietary rights, these efforts may not be sufficient or effective at preventing their unauthorized use. In addition, effective trademark, patent, copyright and trade secret protection may not be available or cost-effective in every country in which we have rights. There may be instances where we are not able to protect intellectual property or other proprietary rights in a manner that maximizes competitive advantage. If we are unable to protect our intellectual property and other proprietary rights from unauthorized use, the value of those assets may be reduced, which could negatively impact our business.

We also rely in part on confidentiality and/or assignment agreements with our technology partners, employees, consultants, advisors and others. These protections and agreements may not effectively prevent disclosure of our confidential information and may not provide an adequate remedy in the event of unauthorized disclosure. In addition, others may independently discover our trade secrets and intellectual property information we thought to be proprietary, and in these cases we would not be able to assert any trade secret rights against those parties. Despite our efforts to protect our intellectual property, unauthorized parties may attempt to copy or otherwise obtain and use our intellectual property or technology. Monitoring unauthorized use of our intellectual property is difficult and expensive. We have not made such monitoring a priority to date and will not likely make this a priority in the future. We cannot be certain that the steps we have taken or will

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take will prevent misappropriation of our technology, particularly in foreign countries where the laws may not protect our proprietary rights as fully as in the United States.

If we fail to protect our intellectual property adequately, our competitors might gain access to our technology, and our business might be harmed. In addition, even if we protect our intellectual property, we may need to license it to competitors, which could also be harmful. For example, as a result of the settlement of an intellectual property matter, we have already licensed all of our issued patents, pending applications, and future patents and patent applications that we may acquire, obtain, apply for or have a right to license to Brocade Communications Systems, Inc. until May 2025, for the life of each such patent. In addition, we might incur significant expenses in defending our intellectual property rights. Any of our patents, copyrights, trademarks or other intellectual property rights could be challenged by others or invalidated through administrative process or litigation.

We may in the future initiate claims or litigation against third parties for infringement of our proprietary rights or to establish the validity of our proprietary rights. Any litigation, whether or not resolved in our favor, could result in significant expense to us and divert the efforts of our management and technical personnel, as well as cause other claims to be made against us, which might adversely affect our business, operating results and financial condition.

We generate a significant amount of revenue from sales to distributors, resellers, and end-customers outside of the United States, and we are therefore subject to a number of risks that could adversely affect these international sources of our revenue.

A significant portion of our revenue is generated in international markets, including Japan, Western Europe, China, Taiwan and South Korea. During the six months ended June 30, 2019 and the years ended December 31, 2018 and 2017, approximately 66%, 55% and 51% of our total revenue, respectively, was generated from customers located outside of the United States. If we are unable to maintain or continue to grow our revenue in these markets, our financial results may suffer.

As a result, we must hire and train experienced personnel to staff and manage our foreign operations. To the extent that we experience difficulties in recruiting, training, managing and retaining an international staff, and specifically sales management and sales personnel, we may experience difficulties in sales productivity in foreign markets. We also seek to enter into distributor and reseller relationships with companies in certain international markets where we do not have a local presence. If we are not able to maintain successful distributor relationships internationally or recruit additional companies to enter into distributor relationships, our future success in these international markets could be limited. Business practices in the international markets that we serve may differ from those in the United States and may require us in the future to include terms in customer contracts other than our standard terms. To the extent that we may enter into customer contracts in the future that include non-standard terms, our operating results may be adversely impacted.

We have a significant presence in international markets and plan to continue to expand our international operations, which exposes us to a number of risks that could affect our future growth.

Our sales team is comprised of field sales and inside sales personnel who are organized by geography and maintain sales presence in 29 countries as of June 30, 2019, including in the following countries and regions: United States, Western Europe, the Middle East, Japan, China, Taiwan, South Korea, Southeast Asia and Latin America. We expect to continue to increase our sales headcount in all markets, particularly in markets where we currently do not have a sales presence. As we continue to expand our international sales and operations, we are subject to a number of risks, including the following:

• greater difficulty in enforcing contracts and accounts receivable collection and possible longer collection periods;

• increased expenses incurred in establishing and maintaining office space and equipment for our international operations;

• greater difficulty in recruiting local experienced personnel, and the costs and expenses associated with such activities;

• general economic and political conditions in these foreign markets;

• economic uncertainty around the world, including continued economic uncertainty as a result of sovereign debt issues in Europe and the United Kingdom’s decision to exit the European Union (commonly referred to as “Brexit”);

• management communication and integration problems resulting from cultural and geographic dispersion;

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• risks associated with trade restrictions and foreign legal requirements, including the importation, certification, and localization of our products required in foreign countries;

• greater risk of unexpected changes in regulatory practices, tariffs, and tax laws and treaties;

• the uncertainty of protection for intellectual property rights in some countries;

• greater risk of a failure of foreign employees to comply with both U.S. and foreign laws, including antitrust regulations, the U.S. Foreign Corrupt Practices Act (“FCPA”), and any trade regulations ensuring fair trade practices; and

• heightened risk of unfair or corrupt business practices in certain geographies and of improper or fraudulent sales arrangements that may impact financial results and result in restatements of, or irregularities in, financial statements.

Because of our worldwide operations, we are also subject to risks associated with compliance with applicable anticorruption laws. One such applicable anticorruption law is the FCPA, which generally prohibits U.S. companies and their employees and intermediaries from making payments to foreign officials for the purpose of obtaining or keeping business, securing an advantage, or directing business to another, and requires public companies to maintain accurate books and records and a system of internal accounting controls. Under the FCPA, U.S. companies may be held liable for actions taken by directors, officers, employees, agents, or other strategic or local partners or representatives. As such, if we or our intermediaries, such as channel partners and distributors, fail to comply with the requirements of the FCPA or similar legislation, governmental authorities in the United States and elsewhere could seek to impose civil and/or criminal fines and penalties which could have a material adverse effect on our business, operating results and financial condition.

We are exposed to fluctuations in currency exchange rates, which could negatively affect our results of operations.

Our consolidated results of operations, financial position and cash flows are subject to fluctuations due to changes in foreign currency exchange rates. Historically, the majority of our revenue contracts are denominated in U.S. dollars, with the most significant exception being Japan, where we invoice primarily in the Japanese yen. Our expenses are generally denominated in the currencies in which our operations are located, which is primarily in North America and EMEA Revenue resulting from selling in local currencies and costs incurred in local currencies are exposed to foreign currency exchange rate fluctuations that can affect our operating income. The currency exchange impact of the foreign exchange rates on our net loss was $1.0million unfavorable for the six months ended June 30, 2019, and $0.7 million and $0.4 million unfavorable for the years ended December 31, 2018 and 2017, respectively. As exchange rates vary, our operating income may differ from expectations. We deploy normal and customary hedging practices that are designed to proactively mitigate such exposure. The use of such hedging activities may not offset any, or more than a portion, of the adverse financial effects of unfavorable movements in currency exchange rates over the limited time the hedges are in place and would not protect us from long term shifts in currency exchange rates.

Our success depends on our key personnel and our ability to hire, retain and motivate qualified product development, sales, marketing and finance personnel.

Our success depends to a significant degree upon the continued contributions of our key management, product development, sales, marketing and finance personnel, many of whom may be difficult to replace. The complexity of our products, their integration into existing networks and ongoing support of our products requires us to retain highly trained professional services, customer support and sales personnel with specific expertise related to our business. Competition for qualified professional services, customer support, engineering and sales personnel in our industry is intense, because of the limited number of people available with the necessary technical skills and understanding of our products. Our ability to recruit and hire these personnel is harmed by tightening labor markets, particularly in the engineering field, in several of our key geographic hiring areas. We may not be successful in attracting, integrating, or retaining qualified personnel to fulfill our current or future needs, nor may we be successful in keeping the qualified personnel we currently have. Our ability to hire and retain these personnel may be adversely affected by volatility or reductions in the price of our common stock, since these employees are generally granted equity-based awards.

In July 2019, we announced the planned retirement of Lee Chen, our president and chief executive officer. Our board of directors has formed a search committee and retained an executive search firm for the purpose of recruiting and exploring potential chief executive officer candidates. Upon the appointment of a successor, Mr. Chen will resign as president and chief executive officer. This executive leadership transition has the potential to disrupt our operations and relationships with

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employees, customers and suppliers, as the search could take us longer than expected and divert management resources, and the newly hired employee could take longer than expected to integrate into the executive management team.

Our future performance also depends on the continued services and continuing contributions of certain employees and members of senior management to execute on our business plan and to identify and pursue new opportunities and product innovations. Our senior management team, significant employees with technical expertise, and product and sales managers, among others, are critical to the development of our technology and the future vision and strategic direction of our company. The loss of their services could significantly delay or prevent the achievement of our development and strategic objectives, which could adversely affect our business, financial condition, and operating results.

There can be no assurance that our exploration of strategic alternatives will result in any transaction being consummated, and speculation and uncertainty regarding the outcome of our exploration of strategic alternatives may adversely impact our business.

On July 30, 2019, we announced that our board of directors has formed a Strategy Committee tasked and empowered with overseeing and executing specific activities directed to increasing shareholder value. In furtherance of these activities, we have retained Bank of America Merrill Lynch to advise us and the board on strategic matters, including a near term exploration of a potential sale or change of control transaction. No assurance can be given that such a transaction will be consummated in the near term or at all. In addition, speculation and uncertainty regarding our exploration of strategic alternatives may cause or result in:

• disruption of our business;

• distraction of our management and employees;

• difficulty in recruiting, hiring, motivating, and retaining talented and skilled personnel, such as a successor to our current president and chief executive officer;

• difficulty in maintaining or negotiating and consummating new, business or strategic relationships or transactions;

• increased stock price volatility; and

• increased costs and advisory fees.

If we are unable to mitigate these or other potential risks related to the uncertainty caused by our exploration of strategic alternatives, it may disrupt our business or adversely impact our revenue, operating results, and financial condition.

Adverse general economic conditions or reduced information technology spending may adversely impact our business.

A substantial portion of our business depends on the demand for information technology by large enterprises and service providers, the overall economic health of our current and prospective end-customers and the continued growth and evolution of the Internet. The timing of the purchase of our products is often discretionary and may involve a significant commitment of capital and other resources. Volatility in the global economic market or other effects of global or regional economic weakness, including limited availability of credit, a reduction in business confidence and activity, deficit-driven austerity measures that continue to affect governments and educational institutions, and other difficulties may affect one or more of the industries to which we sell our products and services. If economic conditions in the United States, Europe and other key markets for our products continue to be volatile or do not improve or those markets experience another downturn, many end-customers may delay or reduce their IT spending. This could result in reductions in sales of our products and services, longer sales cycles, slower adoption of new technologies and increased price competition. Any of these events would likely harm our business, operating results and financial condition. In addition, there can be no assurance that IT spending levels will increase following any recovery.

Exposure to UK political developments, including the outcome of the UK referendum on membership in the European Union, could have a material adverse effect on us.

On June 23, 2016, the electorate in the United Kingdom, or UK, voted in favor of leaving the European Union, or EU, (commonly referred to as the “Brexit”). Thereafter, on March 29, 2017, the country formally notified the EU of its intention to

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withdraw pursuant to Article 50 of the Lisbon Treaty. Although the withdrawal of the UK from the EU was scheduled to take effect on March 29, 2019, the withdrawal date was extended until April 12, 2019 and further extended until October 31, 2019, although it could occur earlier if the UK so determines.

The effects of Brexit will depend on agreements the UK makes to retain access to EU markets either during a transitional period or more permanently. Brexit creates an uncertain political and economic environment in the UK and potentially across other EU member states for the foreseeable future, including during any period while the terms of Brexit are being negotiated and such uncertainties could impair or limit our ability to transact business in the member EU states.

The political and economic uncertainty created by the Brexit vote has caused and may continue to cause significant volatility in global financial markets and in the value of the Pound Sterling currency or other currencies, including the Euro. Depending on the terms reached regarding any exit from the European Union, it is possible that there may be adverse practical and/or operational implications on our business.

Consequently, no assurance can be given as to the overall impact of the Brexit and, in particular, no assurance can be given that our operating results, financial condition and prospects would not be adversely impacted by the result.

Enhanced United States tariffs import/export restrictions, Chinese regulations or other trade barriers may have a negative effect on global economic conditions, financial markets and our business.

There is currently significant uncertainty about the future relationship between the United States and various other countries, most significantly China, with respect to trade policies, treaties, tariffs and taxes. The current U.S. presidential administration has called for substantial changes to U.S. foreign trade policy with respect to China and other countries, including the possibility of imposing greater restrictions on international trade and significant increases in tariffs on goods imported into the United States. In 2018, the Office of the U.S. Trade Representative (the “USTR”) enacted tariffs on imports into the U.S. from China, including communications equipment products and components manufactured and imported from China, and the countries continue to negotiate a trade deal. An increase in tariffs will cause our costs to increase, which could narrow the profits we earn from sales of products requiring such materials. Furthermore, if tariffs, trade restrictions, or trade barriers are placed on products such as ours by foreign governments, especially China, the prices for our products may increase, which may result in the loss of customers and harm to our business, financial condition and results of operations. There can be no assurance that we will not experience a disruption in business related to these or other changes in trade practices and the process of changing suppliers in order to mitigate any such tariff costs could be complicated, time consuming and costly.

Furthermore, the U.S. tariffs may cause customers to delay orders as they evaluate where to take delivery of our products in connection with their efforts to mitigate their own tariff exposure. Such delays create forecasting difficulties for us and increase the risk that orders might be canceled or might never be placed. Current or future tariffs imposed by the U.S. may also negatively impact our customers’ sales, thereby causing an indirect negative impact on our own sales. Any reduction in customers’ sales, and/or any apprehension among distributors and customers of a possible reduction in such sales, would likely cause an indirect negative impact on our own sales.

Additionally, the current uncertainty about the future relationship between the United States and other countries with respect to the trade policies, treaties, taxes, government regulations and tariffs makes it difficult to plan for the future. New developments in these areas, or the perception that any of them could occur, may have a material adverse effect on global economic conditions and the stability of global financial markets, and may significantly reduce global trade and, in particular, trade between these nations and the United States. Any of these factors could depress economic activity and restrict our access to suppliers or customers and have a material adverse effect on our business, financial condition and results of operations and affect our strategy in China and elsewhere around the world. Given the uncertainty of further developments related to tariffs, international trade agreements and policies we can give no assurance that our business, financial condition and operating results would not be adversely affected.

We are dependent on third-party manufacturers, and changes to those relationships, expected or unexpected, may result in delays or disruptions that could harm our business.

We outsource the manufacturing of our hardware components to third-party original design manufacturers who assemble these hardware components to our specifications. Our primary manufacturers are Lanner and AEWIN, each of which is located in Taiwan. Our reliance on these third-party manufacturers reduces our control over the manufacturing process and exposes us to risks, including reduced control over quality assurance, product costs, and product supply and timing. Any manufacturing disruption at these manufacturers could severely impair our ability to fulfill orders. Our reliance on outsourced manufacturers also may create the potential for infringement or misappropriation of our intellectual property rights or

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confidential information. If we are unable to manage our relationships with these manufacturers effectively, or if these manufacturers suffer delays or disruptions for any reason, experience increased manufacturing lead-times, experience capacity constraints or quality control problems in their manufacturing operations, or fail to meet our future requirements for timely delivery, our ability to ship products to our end-customers would be severely impaired, and our business and operating results would be seriously harmed.

These manufacturers typically fulfill our supply requirements on the basis of individual orders. We do not have long-term contracts with our manufacturers that guarantee capacity, the continuation of particular pricing terms, or the extension of credit limits. Accordingly, they are not obligated to continue to fulfill our supply requirements, which could result in supply shortages, and the prices we are charged for manufacturing services could be increased on short notice. In addition, our orders may represent a relatively small percentage of the overall orders received by our manufacturers from their customers. As a result, fulfilling our orders may not be considered a priority by one or more of our manufacturers in the event the manufacturer is constrained in its ability to fulfill all of its customer obligations in a timely manner.

Although the services required to manufacture our hardware components may be readily available from a number of established manufacturers, it is time-consuming and costly to qualify and implement such relationships. If we are required to change manufacturers, whether due to an interruption in one of our manufacturers’ businesses, quality control problems or otherwise, or if we are required to engage additional manufacturers, our ability to meet our scheduled product deliveries to our customers could be adversely affected, which could cause the loss of sales to existing or potential customers, delayed revenue or an increase in our costs that could adversely affect our gross margin.

Because some of the key components in our products come from limited sources of supply, we are susceptible to supply shortages or supply changes, which could disrupt or delay our scheduled product deliveries to our end-customers and may result in the loss of sales and end-customers.

Our products incorporate key components, including certain integrated circuits that we and our third-party manufacturers purchase on our behalf from a limited number of suppliers, including some sole-source providers. In addition, the lead times associated with these and other components of our products can be lengthy and preclude rapid changes in quantities and delivery schedules. Moreover, long-term supply and maintenance obligations to our end-customers increase the duration for which specific components are required, which may further increase the risk we may incur component shortages or the cost of carrying inventory. If we are unable to obtain a sufficient quantity of these components in a timely manner for any reason, sales and/or shipments of our products could be delayed or halted, which would seriously affect present and future sales and cause damage to end-customer relationships, which would, in turn, adversely affect our business, financial condition and results of operations.

In addition, our component suppliers change their selling prices frequently in response to market trends, including industry-wide increases in demand, and because we do not necessarily have contracts with these suppliers, we are susceptible to price fluctuations related to raw materials and components. If we are unable to pass component price increases along to our end-customers or maintain stable pricing, our gross margin and operating results could be negatively impacted. Furthermore, poor quality in sole-sourced components or certain other components in our products could also result in lost sales or lost sales opportunities. If the quality of such components does not meet our standards or our end-customers’ requirements, if we are unable to obtain components from our existing suppliers on commercially reasonable terms, or if any of our sole source providers cease to continue to manufacture such components or to remain in business, we could be forced to redesign our products and qualify new components from alternate suppliers. The development of alternate sources for those components can be time-consuming, difficult and costly, and we may not be able to develop alternate or second sources in a timely manner. Even if we are able to locate alternate sources of supply, we could be forced to pay for expedited shipments of such components or our products at dramatically increased costs.

Real or perceived defects, errors, or vulnerabilities in our products or services or the failure of our products or services to block a threat or prevent a security breach could harm our reputation and adversely impact our results of operations.

Because our products and services are complex, they have contained and may contain design or manufacturing defects or errors that are not detected until after their commercial release and deployment by our customers. Even if we discover those weaknesses, we may not be able to correct them promptly, if at all. Defects may cause our products to be vulnerable to security attacks, cause them to fail to help secure networks, or temporarily interrupt end-customers’ networking traffic. Furthermore, our products may fail to detect or prevent malware, viruses, worms or similar threats for any number of reasons, including our failure to enhance and expand our platform to reflect industry trends, new technologies and new operating environments, the complexity of the environment of our end-customers and the sophistication of malware, viruses and other threats. Data thieves and hackers are increasingly sophisticated, often affiliated with organized crime or state-sponsored groups, and may operate

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large-scale and complex automated attacks. The techniques used to obtain unauthorized access or to sabotage networks change frequently and may not be recognized until launched against a target. Additionally, as a well-known provider of enterprise security solutions, our networks, products, and services could be targeted by attacks specifically designed to disrupt our business and harm our reputation. As our products are adopted by an increasing number of enterprises and governments, it is possible that the individuals and organizations behind advanced attacks will focus on finding ways to defeat our products. In addition, defects or errors in our updates to our products could result in a failure of our services to effectively update end-customers’ products and thereby leave our end-customers vulnerable to attacks. Our data centers and networks may experience technical failures and downtime, may fail to distribute appropriate updates, or may fail to meet the increased requirements of a growing installed end-customer base, any of which could temporarily or permanently expose our end-customers’ networks, leaving their networks unprotected against security threats. Our end-customers may also misuse or wrongly configure our products or otherwise fall prey to attacks that our products cannot protect against, which may result in loss or a breach of business data, data being inaccessible due to a “ransomware” attack, or other security incidents. For all of these reasons, we may be unable to anticipate all data security threats or provide a solution in time to protect our end-customers’ networks. If we fail to identify and respond to new and increasingly complex methods of attack and to update our products to detect or prevent such threats in time to protect our end-customers’ critical business data, our business, operating results and reputation could suffer.

If any companies or governments that are publicly known to use our platform are the subject of a cyberattack that becomes publicized, our other current or potential channel partners or end-customers may look to our competitors for alternatives to our products. Real or perceived security breaches of our end-customers’ networks could cause disruption or damage to their networks or other negative consequences and could result in negative publicity to us, damage to our reputation, declining sales, increased expenses and end-customer relations issues. To the extent potential end-customers or industry analysts believe that the occurrence of any actual or perceived failure of our products to detect or prevent malware, viruses, worms or similar threats is a flaw or indicates that our products do not provide significant value, our reputation and business could be harmed.

Any real or perceived defects, errors, or vulnerabilities in our products, or any failure of our products to detect a threat, could result in:

• a loss of existing or potential end-customers or channel partners;

• delayed or lost revenue;

• a delay in attaining, or the failure to attain, market acceptance;

• the expenditure of significant financial and product development resources in efforts to analyze, correct, eliminate, or work around errors or defects, to address and eliminate vulnerabilities, to remediate harms potentially caused by those vulnerabilities, or to identify and ramp up production with third-party providers;

• an increase in warranty claims, or an increase in the cost of servicing warranty claims, either of which would adversely affect our gross margins;

• harm to our reputation or brand; and

• litigation, regulatory inquiries, or investigations that may be costly and further harm our reputation.

Although we maintain cyber liability coverage that may cover certain liabilities in connection with a security breach, we cannot be certain that our insurance coverage will be adequate for liabilities actually incurred, that insurance will continue to be available to use on commercially reasonable terms, or at all, or that any insurer will not deny coverage as to any future claim. The successful assertion of one or more large claims against us that exceed available insurance coverage, or the occurrence of changes in our insurance policies, including premium increases or the imposition of large deductible or co-insurance requirements, could have a material adverse effect on our business, including our financial condition, results of operation and reputation.

Our business is subject to the risks of warranty claims, product returns, product liability, and product defects.

Real or perceived errors, failures or bugs in our products could result in claims by end-customers for losses that they sustain. If end-customers make these types of claims, we may be required, or may choose, for customer relations or other reasons, to expend additional resources in order to help correct the problem. Historically, the amount of warranty claims has not

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been significant, but there are no assurances that the amount of such claims will not be material in the future. Liability provisions in our standard terms and conditions of sale, and those of our resellers and distributors, may not be enforceable under some circumstances or may not fully or effectively protect us from customer claims and related liabilities and costs, including indemnification obligations under our agreements with resellers, distributors or end-customers. The sale and support of our products also entail the risk of product liability claims. We maintain insurance to protect against certain types of claims associated with the use of our products, but our insurance coverage may not adequately cover any such claims. In addition, even claims that ultimately are unsuccessful could result in expenditures of funds in connection with litigation and divert management’s time and other resources.

Failure to protect and ensure the confidentiality and security of data could lead to legal liability, adversely affect our reputation and have a material adverse effect on our operating results, business and reputation.

We may collect, store and use certain confidential information in the course of providing our services, and we have invested in preserving the security of this data. We may also outsource operations to third-party service providers to whom we transmit certain confidential data. There are no assurances that any security measures we have in place, or any additional security measures that our subcontractors may have in place, will be sufficient to protect this confidential information from unauthorized security breaches.

We cannot assure you that, despite the implementation of these security measures, we will not be subject to a security incident or other data breach or that this data will not be compromised. We may be required to expend significant capital and other resources to protect against security breaches or to alleviate problems caused by security breaches, or to pay penalties as a result of such breaches. Despite our implementation of security measures, techniques used to obtain unauthorized access or to sabotage systems change frequently and may not be recognized until launched against a target. As a result, we may be unable to anticipate these techniques or implement adequate preventative measures to protect this data. In addition, security breaches can also occur as a result of non-technical issues, including intentional or inadvertent breaches by our employees or service providers or by other persons or entities with whom we have commercial relationships. Any compromise or perceived compromise of our security could damage our reputation with our end-customers, and could subject us to significant liability, as well as regulatory action, including financial penalties, which would materially adversely affect our brand, results of operations, financial condition, business and prospects.

We have incurred, and expect to continue to incur, significant costs to protect against security breaches. We may incur significant additional costs in the future to address problems caused by any actual or perceived security breaches.

Breaches of our security measures or those of our third-party service providers, or other security incidents, could result in: unauthorized access to our sites, networks and systems; unauthorized access to, misuse or misappropriation of information, including personally identifiable information, or other confidential or proprietary information of ourselves or third parties; viruses, worms, spyware or other malware being served from our sites, networks or systems; deletion or modification of content or the display of unauthorized content on our sites; interruption, disruption or malfunction of operations; costs relating to notification of individuals, or other forms of breach remediation; deployment of additional personnel and protection technologies; response to governmental investigations and media inquiries and coverage; engagement of third-party experts and consultants; litigation, regulatory investigations, prosecutions, and other actions; and other potential liabilities. If any of these events occurs, or is believed to occur, our reputation and brand could be damaged, our business may suffer, we could be required to expend significant capital and other resources to alleviate problems caused by such actual or perceived breaches, we could be exposed to a risk of loss, litigation or regulatory action and possible liability, and our ability to operate our business, including our ability to provide maintenance and support services to our channel partners and end-customers, may be impaired. If current or prospective channel partners and end-customers believe that our systems and solutions do not provide adequate security for their businesses’ needs, our business and our financial results could be harmed. Additionally, actual, potential or anticipated attacks may cause us to incur increasing costs, including costs to deploy additional personnel and protection technologies, train employees and engage third-party experts and consultants.

Although we maintain privacy, data breach and network security liability insurance, we cannot be certain that our coverage will be adequate for liabilities actually incurred or that insurance will continue to be available to us on economically reasonable terms, or at all. Any actual or perceived compromise or breach of our security measures, or those of our third-party service providers, or any unauthorized access to, misuse or misappropriation of personally identifiable information, channel partners’ or end-customers information, or other information, could violate applicable laws and regulations, contractual obligations or other legal obligations and cause significant legal and financial exposure, adverse publicity and a loss of confidence in our security measures, any of which could have an material adverse effect on our business, financial condition and operating results.

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Our failure to adequately protect personal data could have a material adverse effect on our business.

A wide variety of provincial, state, national, foreign, and international laws and regulations apply to the collection, use, retention, protection, disclosure, transfer, and other processing of personal data. These data protection and privacy-related laws and regulations are evolving and being tested in courts and may result in ever-increasing regulatory and public scrutiny and escalating levels of enforcement and sanctions. For example, the European Union has adopted a General Data Protection Regulation, or GDPR, which superseded the Data Protection Directive. This regulation, which took effect in May 2018, has caused EU data protection requirements to be more stringent and provide for greater penalties. Because the GDPR is new, it may be subject to new or changing interpretations by courts, and our interpretation of the law and efforts to comply with the rules and regulations of the law may be ruled invalid. Noncompliance with the GDPR can trigger fines of up to €20 million or 4% of global annual revenues, whichever is higher. The United Kingdom also recently enacted legislation that substantially implements the GDPR. Additionally, California recently enacted the California Consumer Privacy Act, or CCPA, which will, among other things, require covered companies to provide new disclosures to California consumers, and afford such consumers new rights to opt-out of certain sales of personal information, when it goes into effect on January 1, 2020. The CCPA recently was amended, and legislators have proposed additional amendments to the CCPA, of which nearly a dozen continue to progress through the California Senate committee. In addition, the Office of the California Attorney General will be promulgating regulations to establish procedures to facilitate these new rights. The proposed regulations are anticipated to be published in the fall of 2019, and the deadline for the California Attorney General to release final regulations is July 1, 2020. As such, it remains unclear whether further modifications will be made to this legislation or how it will be interpreted and enforced. In addition, other states have enacted or proposed legislation that regulates the collection, use, and sale of personal information, and such regimes might not be compatible with either the GDPR or the CCPA. We cannot yet predict the impact of the CCPA or impending legislation on our business or operations, but it may require us to modify our data processing practices and policies and to incur substantial costs and expenses in an effort to comply. Our failure to comply with applicable laws and regulations, or to protect such data, could result in enforcement action against us, including significant fines, imprisonment of company officials and public censure, claims for damages by end-customers and other affected persons and entities, damage to our reputation and loss of goodwill (both in relation to existing and prospective channel partners and end-customers), and other forms of injunctive or operations-limiting relief, any of which could have a material adverse effect on our operations, financial performance, and business. Evolving and changing definitions of personal data and personal information, within the European Union, the United States, and elsewhere, especially relating to classification of Internet Protocol (“IP”) addresses, machine identification, location data, biometric data and other information, may limit or inhibit our ability to operate or expand our business, including limiting strategic partnerships that may involve the sharing of data. We may be required to expend significant resources to modify our solutions and otherwise adapt to these changes, which we may be unable to do on commercially reasonable terms or at all, and our ability to develop new solutions and features could be limited. These developments could harm our business, financial condition and results of operations. Even if not subject to legal challenge, the perception of privacy concerns, whether or not valid, may harm our reputation and inhibit adoption of our products by current and prospective end-customers.

If the general level of advanced cyberattacks declines, or is perceived by our current or potential customers to have declined, our business could be harmed.

Our security business may be dependent on enterprises and governments recognizing that advanced cyberattacks are pervasive and are not effectively prevented by legacy security solutions. High visibility attacks on prominent companies and governments have increased market awareness of advanced cyberattacks and help to provide an impetus for enterprises and governments to devote resources to protecting against advanced cyberattacks, which may include testing, purchasing and deploying our products. If advanced cyberattacks were to decline, or enterprises or governments perceived a decline in the general level of advanced cyberattacks, our ability to attract new channel partners and end-customers and expand our offerings within existing channel partners and end-customers could be materially and adversely affected. An actual or perceived reduction in the threat landscape could increase our sales cycles and harm our business, results of operations and financial condition.

Undetected software or hardware errors may harm our business and results of operations.

Our products may contain undetected errors or defects when first introduced or as new versions are released. We have experienced these errors or defects in the past in connection with new products and product upgrades. We expect that these errors or defects will be found from time to time in new or enhanced products after commencement of commercial distribution. These problems have in the past and may in the future cause us to incur significant warranty and repair costs, divert the attention of our engineering personnel from our product development efforts and cause significant customer relations problems. We may also be subject to liability claims for damages related to product errors or defects. While we carry insurance policies

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covering this type of liability, these policies may not provide sufficient protection should a claim be asserted. A material product liability claim may harm our business and results of operations.

Any errors, defects or vulnerabilities in our products could result in:

• expenditures of significant financial and product development resources in efforts to analyze, correct, eliminate or work around errors and defects or to address and eliminate vulnerabilities;

• loss of existing or potential end-customers or distribution channel partners;

• delayed or lost revenue;

• delay or failure to attain market acceptance;

• indemnification obligations under our agreements with resellers, distributors and/or end-customers;

• an increase in warranty claims compared with our historical experience or an increased cost of servicing warranty claims, either of which would adversely affect our gross margin; and

• litigation, regulatory inquiries, or investigations that may be costly and harm our reputation.

Our use of open source software in our products could negatively affect our ability to sell our products and subject us to possible litigation.

We incorporate open source software such as the Linux operating system kernel into our products. We have implemented a formal open source use policy, including written guidelines for use of open source software and business processes for approval of that use. We have developed and implemented our open source policies according to industry practice; however, best practices in this area are subject to change, because there is little reported case law on the interpretation of material terms of many open source licenses. We are in the process of reviewing our open source use and our compliance with open source licenses and implementing remediation and changes necessary to comply with the open source licenses related thereto. We cannot guarantee that our use of open source software has been, and will be, managed effectively for our intended business purposes and/or compliant with applicable open source licenses. We may face legal action by third parties seeking to enforce their intellectual property rights related to our use of such open source software. Failure to adequately manage open source license compliance and our use of open source software may result in unanticipated obligations regarding our products and services, such as a requirement that we license proprietary portions of our products or services on unfavorable terms, that we make available source code for modifications or derivative works we created based upon, incorporating or using open source software, that we license such modifications or derivative works under the terms of the particular open source license and/or that we redesign the affected products or services, which could result, for example, in a loss of intellectual property rights, or delay in providing our products and services. From time to time, there have been claims against companies that distribute or use third-party open source software in their products and services, asserting that the open source software or its combination with the products or services infringes third parties’ patents or copyrights, or that the companies’ distribution or use of the open source software does not comply with the terms of the applicable open source licenses. Use of certain open source software can lead to greater risks than use of warranted third-party commercial software, as open source licensors generally do not provide warranties or controls on the origin of such open source software. From time to time, there have been claims against companies that use open source software in their products, challenging the ownership of rights in such open source software. As a result, we could also be subject to suits by parties claiming ownership of rights in what we believe to be open source software and so challenging our right to use such software in our products. If any such claims were asserted against us, we could be required to incur significant legal expenses defending against such a claim. Further, if our defenses to such a claim were not successful, we could be, for example, subject to significant damages, be required to seek licenses from third parties in order to continue offering our products and services without infringing such third party’s intellectual property rights, be required to re-engineer such products and services, or be required to discontinue making available such products and services if re-engineering cannot be accomplished on a timely or successful basis. The need to engage in these or other remedies could increase our costs or otherwise adversely affect our business, operating results and financial condition.

Our products must interoperate with operating systems, software applications and hardware that are developed by others and if we are unable to devote the necessary resources to ensure that our products interoperate with such software and hardware, we may fail to increase, or we may lose market share and we may experience a weakening demand for our products.

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Our products must interoperate with our end-customers’ existing infrastructure, specifically their networks, servers, software and operating systems, which may be manufactured by a wide variety of vendors and original equipment manufacturers. As a result, when problems occur in a network, it may be difficult to identify the source of the problem. The occurrence of software or hardware problems, whether caused by our products or another vendor’s products, may result in the delay or loss of market acceptance of our products. In addition, when new or updated versions of our end-customers’ software operating systems or applications are introduced, we must sometimes develop updated versions of our software so that our products will interoperate properly. We may not accomplish these development efforts quickly, cost-effectively or at all. These development efforts require capital investment and the devotion of engineering resources. If we fail to maintain compatibility with these applications, our end-customers may not be able to adequately utilize our products, and we may, among other consequences, fail to increase, or we may lose market share and experience a weakening in demand for our products, which would adversely affect our business, operating results and financial condition.

We license technology from third parties, and our inability to maintain those licenses could harm our business.

Many of our products include proprietary technologies licensed from third parties. In the future, it may be necessary to renew licenses for third party technology or obtain new licenses for other technology. These third-party licenses may not be available to us on acceptable terms, if at all. As a result, we could also face delays or be unable to make changes to our products until equivalent technology can be identified, licensed or developed and integrated with our products. Such delays or an inability to make changes to our products, if it were to occur, could adversely affect our business, operating results and financial condition. The inability to obtain certain licenses to third-party technology, or litigation regarding the interpretation or enforcement of license agreements and related intellectual property issues, could have a material adverse effect on our business, operating results and financial condition.

Failure to prevent excess inventories or inventory shortages could result in decreased revenue and gross margin and harm our business.

We purchase products from our manufacturers outside of, and in advance of, reseller or end-customer orders, which we hold in inventory and sell. We place orders with our manufacturers based on our forecasts of our end-customers’ requirements and forecasts provided by our distribution channel partners. These forecasts are based on multiple assumptions, each of which might cause our estimates to be inaccurate, affecting our ability to provide products to our customers. There is a risk we may be unable to sell excess products ordered from our manufacturers. Inventory levels in excess of customer demand may result in obsolete inventory and inventory write-downs. The sale of excess inventory at discounted prices could impair our brand image and have an adverse effect on our financial condition and results of operations. Conversely, if we underestimate demand for our products or if our manufacturers fail to supply products we require at the time we need them, we may experience inventory shortages. Inventory shortages might delay shipments to resellers, distributors and customers and cause us to lose sales. These shortages may diminish the loyalty of our distribution channel partners or customers.

The difficulty in forecasting demand also makes it difficult to estimate our future financial condition and results of operations from period to period. A failure to accurately predict the level of demand for our products could adversely affect our total revenue and net income, and we are unlikely to forecast such effects with any certainty in advance.

Our sales cycles can be long and unpredictable, primarily due to the complexity of our end-customers’ networks and data centers and the length of their budget cycles. As a result, our sales and revenue are difficult to predict and may vary substantially from period to period, which may cause our operating results to fluctuate significantly.

The timing of our sales is difficult to predict because of the length and unpredictability of our products’ sales cycles. A sales cycle is the period between initial contact with a prospective end-customer and any sale of our products. Our sales cycle, in particular to our large end-customers, may be lengthy due to the complexity of their networks and data centers. Because of this complexity, prospective end-customers generally consider a number of factors over an extended period of time before committing to purchase our products. End-customers often view the purchase of our products as a significant and strategic decision that can have important implications on their existing networks and data centers and, as a result, require considerable time to evaluate, test and qualify our products prior to making a purchase decision and placing an order to ensure that our products will successfully interoperate with our end-customers’ complex network and data centers. Additionally, the budgetary decisions at these entities can be lengthy and require multiple organization reviews. The length of time that end-customers devote to their evaluation of our products and decision-making process varies significantly. The length of our products’ sales cycles typically ranges from three to 12 months but can be longer for our large end-customers. In addition, the length of our close or sales cycle can be affected by the extent to which customized features are requested, in particular in our large deals.

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For all of these reasons, it is difficult to predict whether a sale will be completed or the particular fiscal period in which a sale will be completed, both of which contribute to the uncertainty of our future operating results. If our close or sales cycles lengthen, our revenue could be lower than expected, which would have an adverse impact on our operating results and could cause our stock price to decline.

Our ability to sell our products is highly dependent on the quality of our support and services offerings, and our failure to offer high-quality support could have a material adverse effect on our business, revenue and results of operations.

We believe that our ability to provide consistent, high quality customer service and technical support is a key factor in attracting and retaining end-customers of all sizes and is critical to the deployment of our products. When support is purchased our end-customers depend on our support organization to provide a broad range of support services, including on-site technical support, 24-hour support and shipment of replacement parts on an expedited basis. If our support organization or our distribution channel partners do not assist our end-customers in deploying our products effectively, succeed in helping our end-customers resolve post-deployment issues quickly, or provide ongoing support, it could adversely affect our ability to sell our products to existing end-customers and could harm our reputation with potential end-customers. We currently have technical support centers in the United States, Japan, China, India and the Netherlands. As we continue to expand our operations internationally, our support organization will face additional challenges, including those associated with delivering support, training and documentation in languages other than English.

We typically sell our products with maintenance and support as part of the initial purchase, and a substantial portion of our support revenue comes from renewals of maintenance and support contracts. Our end-customers have no obligation to renew their maintenance and support contracts after the expiration of the initial period. If we are unable to provide high quality support, our end-customers may elect not to renew their maintenance and support contracts or to reduce the product quantity under their maintenance and support contracts, thereby reducing our future revenue from maintenance and support contracts.

Our failure or the failure of our distribution channel partners to maintain high-quality support and services could have a material and adverse effect on our business, revenue and operating results.

We depend on growth in markets relating to network security, management and analysis, and lack of growth or contraction in one or more of these markets could have a material adverse effect on our results of operations and financial condition.

Demand for our products is linked to, among other things, growth in the size and complexity of network infrastructures and the demand for networking technologies addressing the security, management and analysis of such infrastructures. These markets are dynamic and evolving. Our future financial performance will depend in large part on continued growth in the number of organizations investing in their network infrastructure and the amount they commit to such investments. If this demand declines, our results of operations and financial condition would be materially and adversely affected. Segments of the network infrastructure industry have in the past experienced significant economic downturns. Furthermore, the market for network infrastructure may not continue to grow at historic rates, or at all. The occurrence of any of these factors in the markets relating to network security, management and analysis could materially and adversely affect our results of operations and financial condition.

Because we recognize subscription revenue from our customers over the term of their agreements, downturns or upturns in sales of our subscription-based offerings will not be immediately reflected in our operating results and may adversely affect our revenue in the future.

We recognize subscription revenue over the term of our customer agreements. As a result, most of our subscription revenue arises from agreements entered into during previous periods. A shortfall in orders for our subscription-based solutions in any one period would most likely not significantly reduce our subscription revenue for that period, but could adversely affect the revenue contribution in future periods. In addition, we may be unable to quickly reduce our cost structure in response to a decrease in these orders. Accordingly, the effect of downturns in sales of our subscription-based solutions will not be fully reflected in our operating results until future periods. A subscription revenue model also makes it difficult for us to rapidly increase our revenue through additional subscription sales in any one period, as revenue is generally recognized over a longer period.

Our business and operations have experienced growth in certain prior periods and may experience rapid growth at certain times in the future, and if we do not effectively manage any future growth or are unable to improve our controls, systems and processes, our operating results will be adversely affected.

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In certain prior periods, we have significantly increased the number of our employees and independent contractors. As we hire new employees and independent contractors and expand into new locations outside the United States, we are required to comply with varying local laws for each of these new locations. We anticipate that further expansion of our infrastructure and headcount will be required. Our growth has placed, and will continue to place, a significant strain on our administrative and operational infrastructure and financial resources. Our ability to manage our operations and growth across multiple countries will require us to continue to refine our operational, financial and management controls, human resource policies, and reporting systems and processes.

We need to continue to improve our internal systems, processes, and controls to effectively manage our operations and growth. We may not be able to successfully implement improvements to these systems, processes and controls in an efficient or timely manner. In addition, our systems and processes may not prevent or detect all errors, omissions or fraud. For example, as described in Part I, Item 4, “Controls and Procedures,” of this report, we identified material weaknesses in our internal control over financial reporting and concluded that our internal control over financial reporting was not effective as of December 31, 2018 and December 31, 2017 and that our disclosure controls and procedures were not effective as of June 30, 2019, December 31, 2018 and December 31, 2017. We may experience difficulties in managing improvements to our systems, processes, and controls or in connection with third-party software, which could impair our ability to provide products or services to our customers in a timely manner, causing us to lose customers, limit us to smaller deployments of our products, increase our technical support costs, or damage our reputation and brand. Furthermore, given our growth and size, our management team may lack oversight on certain side agreements between sales personnel and customers. Our failure to improve our systems and processes, or their failure to operate in the intended manner, may result in our inability to manage the growth of our business and to accurately forecast our revenue, expenses, and earnings, or to prevent certain losses, any of which may harm our business and results of operations.

We may not be able to sustain or develop new distributor and reseller relationships, and a reduction or delay in sales to significant distribution channel partners could hurt our business.

We sell our products and services through multiple distribution channels in the United States and internationally. We may not be able to increase our number of distributor or reseller relationships or maintain our existing relationships. Recruiting and retaining qualified distribution channel partners and training them on our technologies requires significant time and resources. These distribution channel partners may also market, sell and support products and services that are competitive with ours and may devote more resources to the marketing, sales and support of such competitive products. Our sales channel structure could subject us to lawsuits, potential liability and reputational harm if, for example, any of our distribution channel partners misrepresent the functionality of our products or services to end-customers or violate laws or our corporate policies. If we are unable to establish or maintain our sales channels or if our distribution channel partners are unable to adapt to our future sales focus and needs, our business and results of operations will be harmed.

The terms of the 2016 Credit Facility and changes in the rate at which we can obtain indebtedness could restrict our operations, particularly our ability to respond to changes in our business or to take specified actions.

In November 2016, we entered into a loan and security agreement (the “2016 Credit Facility”) with Silicon Valley Bank (“SVB”), as the lender. The 2016 Credit Facility contains a number of restrictive covenants that impose operating and financial restrictions on us, including restrictions on our ability to take actions that may be in our best interests. The 2016 Credit Facility requires us to satisfy specified covenants. As of the date of this filing, we had no outstanding balance under the 2016 Credit Facility and were in compliance with all facility covenants. However, we have experienced noncompliance with the covenants under the 2016 Credit Facility in connection with our late submission of quarterly financial statements and annual audited financial statements. While we view this as a one-time event, and while we were able to successfully negotiate a forbearance for such default and ultimately deliver the required financial statements, we may in the future fail to comply with the terms of the 2016 Credit Facility and be unable to negotiate a waiver or forbearance of any such defaults with our lender. If we fail to comply with these covenants in the future, SVB could elect to declare all amounts outstanding under the 2016 Credit Facility to be immediately due and payable and terminate all commitments to extend further credit. If SVB accelerates the repayment, if any, we may not have sufficient funds to repay our existing debt. If we were unable to repay those amounts, SVB could proceed against the collateral granted to it to secure such indebtedness. We have pledged substantially all of our assets, excluding our intellectual property, as collateral under the 2016 Credit Facility. The 2016 Credit Facility uses LIBOR as a reference rate for our revolving loans, such that the interest rate applicable to such loans may, at our option, be calculated based on LIBOR. LIBOR is the subject of recent national, international and other regulatory guidance and proposals for reform. The consequences of these developments cannot be entirely predicted, but if LIBOR is no longer available or if our lender has increased costs due to changes in LIBOR, we may experience potential increases in interest rates on our revolving loans, which could adversely impact our interest expense, results of operations and cash flows.

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Our sales to governmental organizations are subject to a number of challenges and risks.

We sell to governmental organization end-customers. Sales to governmental organizations are subject to a number of challenges and risks. Selling to governmental organizations can be highly competitive, expensive and time consuming, often requiring significant upfront time and expense without any assurance that these efforts will generate a sale. We have not yet received security clearance from the United States government, which prevents us from being able to sell directly for certain governmental uses. There can be no assurance that such clearance will be obtained, and failure to do so may adversely affect our operating results. Governmental organization demand and payment for our products may be impacted by public sector budgetary cycles and funding authorizations, with funding reductions or delays adversely affecting public sector demand for our products. Governmental organizations may have statutory, contractual or other legal rights to terminate contracts with our distributors and resellers for convenience or due to a default, and any such termination may adversely impact our future operating results.

Failure to comply with governmental laws and regulations could harm our business.

Our business is subject to regulation by various federal, state, local and foreign governmental entities, including agencies responsible for monitoring and enforcing employment and labor laws, workplace safety, product safety, environmental laws, consumer protection laws, anti-bribery laws, import/export controls, federal securities laws, and tax laws and regulations. In certain jurisdictions, these regulatory requirements may be more stringent than those in the United States. Noncompliance with applicable regulations or requirements could subject us to investigations, sanctions, mandatory product recalls, enforcement actions, disgorgement of profits, fines, damages, civil and criminal penalties or injunctions. If any governmental sanctions are imposed, or if we do not prevail in any possible civil or criminal litigation, our business, operating results, and financial condition could be materially adversely affected. In addition, responding to any action will likely result in a significant diversion of management’s attention and resources and an increase in professional fees. Enforcement actions and sanctions could harm our business, operating results and financial condition.

We are subject to governmental export and import controls that could subject us to liability or impair our ability to compete in international markets.

Our products are subject to U.S. export controls and may be exported outside the United States only with the required level of export license or through an export license exception because we incorporate encryption technology into our products. In addition, various countries regulate the import of certain encryption technology and have enacted laws that could limit our ability to distribute our products or our end-customers’ ability to implement our products in those countries. Changes in our products or changes in export and import regulations may create delays in the introduction of our products in international markets, prevent our end-customers with international operations from deploying our products throughout their global systems or, in some cases, prevent the export or import of our products to certain countries altogether. Any change in export or import regulations or related legislation, shift in approach to the enforcement or scope of existing regulations or change in the countries, persons or technologies targeted by such regulations, could result in decreased use of our products by, or in our decreased ability to export or sell our products to, existing or potential end-customers with international operations. Any decreased use of our products or limitation on our ability to export or sell our products would likely adversely affect our business, operating results and financial condition.

We discovered that trial software was inadvertently available for download by any international user and, on limited occasions, was downloaded by individuals located in a U.S. sanctioned country. We implemented corrective actions and filed a Voluntary Self Disclosure in February 2017 with the U.S. Department of Commerce and U.S. Department of Treasury regarding these technical violations. Both agencies closed their review without any fines or penalties.

We are subject to various environmental laws and regulations that could impose substantial costs upon us.

Our company must comply with local, state, federal, and international environmental laws and regulations in the countries in which we do business. We are also subject to laws, which restrict certain hazardous substances, including lead, used in the construction of our products, such as the European Union Restriction on the Use of Hazardous Substances in electrical and electronic equipment directive. We are also subject to the European Union Directive, known as the Waste Electrical and Electronic Equipment Directive (“WEEE Directive”), which requires producers of certain electrical and electronic equipment to properly label products, register as a WEEE producer, and provide for the collection, disposal and recycling of waste electronic products. Failure to comply with these environmental directives and other environmental laws could result in the imposition of fines and penalties, inability to sell covered products in certain countries, the loss of revenue, or subject us to third-party property damage or personal injury claims, or require us to incur investigation, remediation or

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engineering costs. Our operations and products will be affected by future environmental laws and regulations, but we cannot predict the ultimate impact of any such future laws and regulations at this time.

Our products must conform to industry standards in order to be accepted by end-customers in our markets.

Generally, our products comprise only a part of a data center. The servers, network, software and other components and systems of a data center must comply with established industry standards in order to interoperate and function efficiently together. We depend on companies that provide other components of the servers and systems in a data center to support prevailing industry standards. Often, these companies are significantly larger and more influential in driving industry standards than we are. Some industry standards may not be widely adopted or implemented uniformly, and competing standards may emerge that may be preferred by our end-customers. If larger companies do not support the same industry standards that we do, or if competing standards emerge, market acceptance of our products could be adversely affected and we may need to incur substantial costs to conform our products to such standards, which could harm our business, operating results and financial condition.

We are dependent on various information technology systems, and failures of or interruptions to those systems could harm our business.

Many of our business processes depend upon our information technology systems, the systems and processes of third parties, and on interfaces with the systems of third parties. If those systems fail or are interrupted, or if our ability to connect to or interact with one or more networks is interrupted, our processes may function at a diminished level or not at all. This could harm our ability to ship or support our products, and our financial results may be harmed.

In addition, reconfiguring or upgrading our information technology systems or other business processes in response to changing business needs may be time-consuming and costly and is subject to risks of delay or failed deployment. To the extent this impacts our ability to react timely to specific market or business opportunities, our financial results may be harmed.

Future acquisitions we may undertake may not result in the financial and strategic goals that are contemplated at the time of the transaction.

We completed the acquisition of substantially all of the assets of Appcito in June 2016 and may make future acquisitions of complementary companies, products or technologies. With respect to the Appcito acquisition or any other future acquisitions we may undertake, we may find that the acquired businesses, products or technologies do not further our business strategy as expected, that we paid more than what the assets are later worth or that economic conditions change, all of which may generate future impairment charges. The Appcito acquisition or any future acquisitions may be viewed negatively by customers, financial markets or investors. There may be difficulty integrating the operations and personnel of an acquired business, and we may have difficulty retaining the key personnel of an acquired business. We may have difficulty in integrating acquired technologies or products with our existing product lines. Any integration process may require significant time and resources, and we may not be able to manage the process successfully. Our ongoing business and management’s attention may be disrupted or diverted by transition or integration issues and the complexity of managing geographically and culturally diverse locations. We may have difficulty maintaining uniform standards, controls, procedures and policies across locations. We may experience significant problems or liabilities associated with product quality, technology and other matters.

Our inability to successfully operate and integrate future acquisitions appropriately, effectively and in a timely manner, or to retain key personnel of any acquired business, could have a material adverse effect on our revenue, gross margin and expenses.

Our ability to use our net operating loss carryforwards may be subject to limitation and may result in increased future tax liability to us.

Generally, a change of more than 50% in the ownership of a corporation’s stock, by value, over a three-year period constitutes an ownership change for U.S. federal income tax purposes. An ownership change may limit a company’s ability to use its net operating loss carryforwards attributable to the period prior to such change. In the event we have undergone an ownership change under Section 382 of the Internal Revenue Code, if we earn net taxable income, our ability to use our pre-change net operating loss carryforwards to offset U.S. federal taxable income may become subject to limitations, which could potentially result in increased future tax liability to us.

Changes in tax laws or regulations or adverse outcomes resulting from examination of our income or other tax returns could adversely affect our operating results and financial condition.

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We are subject to income taxes in the United States and various foreign jurisdictions, and our domestic and international tax liabilities will be subject to the allocation of expenses in differing jurisdictions. Our future effective tax rates could be subject to volatility or adversely affected by a number of factors, including:

• changes in the valuation of our deferred tax assets and liabilities;

• expected timing and amount of the release of tax valuation allowances;

• expiration of, or detrimental changes in, research and development tax credit laws;

• tax effects of stock-based compensation;

• costs related to intercompany restructurings;

• changes in tax laws, regulations, accounting principles or interpretations thereof;

• future earnings being lower than anticipated in countries where we have lower statutory tax rates and higher than anticipated earnings in countries where we have higher statutory tax rates; or

• examinations by US federal, state or foreign jurisdictions that disagree with interpretations of tax rules and regulations in regard to positions taken on tax filings.

As our business grows, we are required to comply with increasingly complex taxation rules and practices. We are subject to tax in multiple U.S. tax jurisdictions and in foreign tax jurisdictions as we expand internationally. The development of our tax strategies requires additional expertise and may impact how we conduct our business. Our future effective tax rates could be unfavorably affected by changes in, or interpretations of, tax rules and regulations in the jurisdictions in which we do business or changes in the valuation of our deferred tax assets and liabilities. Furthermore, we provide for certain tax liabilities that involve significant judgment. We are subject to the examination of our tax returns by federal, state and foreign tax authorities, which could focus on our intercompany transfer pricing methodology as well as other matters. If our tax strategies are ineffective or we are not in compliance with domestic and international tax laws, our financial position, operating results and cash flows could be adversely affected.

In addition, from time to time the United States, foreign and state governments make substantive changes to tax rules and the application of rules to companies. For example, the 2017 Tax Cut and Jobs Act (the “Tax Act”) creates a new requirement that certain income (i.e., Global Intangible Low-Taxed Income, or GILTI) earned by controlled foreign corporations (“CFCs”) must be included currently in the gross income of the CFCs’ U.S. shareholder. Additionally, the Ninth Circuit Court of Appeals, or the Court, issued an opinion in Altera Corp. v. Commissioner addressing cost-sharing regulations governing stock-based compensation. On August 7, 2018, a newly constituted panel issued an order withdrawing the July 24, 2018 opinion to allow the reconstituted panel to confer on the appeal, and the case was reargued on October 16, 2018. The Court is expected to issue a final opinion. We are monitoring this case and any impact the final opinion could have on our financial and effective tax rate. Furthermore, due to shifting economic and political conditions, tax policies or rates in various jurisdictions may be subject to significant change.

We are exposed to the credit risk of our distribution channel partners and end-customers, which could result in material losses and negatively impact our operating results.

Most of our sales are on an open credit basis, with typical payment terms ranging from 30 to 90 days depending on local customs or conditions that exist in the sale location. If any of the distribution channel partners or end-customers responsible for a significant portion of our revenue becomes insolvent or suffers a deterioration in its financial or business condition and is unable to pay for our products, our results of operations could be harmed.

The sales price of our products and subscriptions may decrease, which may reduce our gross profits and adversely impact our financial results.

The sales prices for our products and subscriptions may decline for a variety of reasons, including competitive pricing pressures, discounts, a change in our mix of products and subscriptions, anticipation of the introduction of new products or subscriptions, or promotional programs. Competition continues to increase in the market segments in which we participate, and we expect competition to further increase in the future, thereby leading to increased pricing pressures. Larger competitors with

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more diverse product and service offerings may reduce the price of products or subscriptions that compete with ours or may bundle them with other products and subscriptions. Additionally, although we price our products and subscriptions worldwide in U.S. dollars (except in Japan), currency fluctuations in certain countries and regions may negatively impact actual prices that channel partners and end-customers are willing to pay in those countries and regions. Furthermore, we anticipate that the sales prices and gross profits for our products will decrease over product life cycles. We cannot guarantee that we will be successful in developing and introducing new offerings with enhanced functionality on a timely basis, or that our product and subscription offerings, if introduced, will enable us to maintain our prices and gross profits at levels that will allow us to achieve and maintain profitability.

Our reported financial results may be adversely affected by changes in accounting principles generally accepted in the United States.

Generally accepted accounting principles (“GAAP”) in the United States are subject to interpretation by the Financial Accounting Standards Board (“FASB”), the SEC and various bodies formed to promulgate and interpret appropriate accounting principles. A change in these principles or interpretations could have a significant effect on our reported financial results, and could affect the reporting of transactions completed before the announcement of a change. For example, in May 2014, the FASB issued Accounting Standards Update No. 2014-09 (Topic 606), Revenue from Contracts with Customers, which supersedes nearly all existing revenue recognition guidance under U.S. GAAP. We adopted Topic 606 effective January 1, 2018, applying the modified retrospective method to all contracts that were not completed as of January 1, 2018. This or other changes in accounting principles could adversely affect our financial results, including the comparability of our results. See Note 1 of our Notes to the Condensed Consolidated Financial Statements included in Part I, Item 1 of this report regarding the effect of new accounting pronouncements on our financial statements. Any difficulties in implementing these pronouncements could cause us to fail to meet our financial reporting obligations, which could result in regulatory discipline and harm investors’ confidence in us.

Concentration of ownership among our existing executive officers, a small number of stockholders, directors and their affiliates may prevent new investors from influencing significant corporate decisions.

As of June 30, 2019, our executive officers and directors, together with affiliated entities, owned27% of our then outstanding common stock (45% if other holders of 5% or more of our outstanding common stock are also included). Accordingly, these stockholders, acting together, have significant influence over the election of our directors, over whether matters requiring stockholder approval are approved or disapproved and over our affairs in general. The interests of these stockholders could conflict with your interests. These stockholders may also have an interest in pursuing acquisitions, divestitures, financings or other transactions that, in their judgment, could enhance their investments, even though such transactions might involve risks to you. In addition, this concentration of ownership could have the effect of delaying or preventing a liquidity event such as a merger or liquidation of our company.

Certain stockholders could attempt to influence changes at the Company, which could adversely affect our operations, financial condition and the value of our common stock.

Our stockholders may from time-to-time seek to acquire a controlling stake in us, engage in proxy solicitations, advance stockholder proposals or otherwise attempt to effect changes. Campaigns by stockholders to effect changes at publicly-traded companies are sometimes led by investors seeking to increase short-term stockholder value through actions such as financial restructuring, increased debt, special dividends, stock repurchases or sales of assets or the entire company. Responding to proxy contests and other actions by activist stockholders can be costly and time-consuming, and could disrupt our operations and divert the attention of our board of directors and senior management from the pursuit of our business strategies. These actions could adversely affect our operations, financial condition and the value of our common stock.

We may need to raise additional funds in future private or public offerings, and such funds may not be available on acceptable terms, if at all. If we do raise additional funds, existing stockholders will suffer dilution.

We may need to raise additional funds in private or public offerings, and these funds may not be available to us when we need them or on acceptable terms, if at all. If we raise additional funds through further issuances of equity or convertible debt securities, you could suffer significant dilution, and any new equity securities we issue could have rights, preferences and privileges superior to those of our then-existing capital stock. The 2016 Credit Facility, as well as any debt financing secured by us in the future could involve restrictive covenants relating to our capital raising activities and other financial and operational matters, that may make it more difficult for us to obtain additional capital and to pursue business opportunities. If we cannot raise additional funds when we need them, our business and prospects could fail or be materially and adversely affected.

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The price of our common stock has been and may continue to be volatile, and the value of your investment could decline.

Technology stocks have historically experienced high levels of volatility. The trading price of our common stock has been and is likely to continue to be volatile and subject to fluctuations in response to many factors, some of which are beyond our control and may not be related to our operating performance. These fluctuations could cause you to lose all or part of your investment in our common stock. Factors that could cause fluctuations in the trading price of our common stock include the following:

• announcements of new products, services or technologies, commercial relationships, acquisitions or other events by us or our competitors;

• price and volume fluctuations in the overall stock market from time to time;

• significant volatility in the market price and trading volume of technology companies in general and of companies in our industry;

• fluctuations in the trading volume of our shares or the size of our public float;

• actual or anticipated changes or fluctuations in our results of operations;

• whether our results of operations meet the expectations of securities analysts or investors;

• actual or anticipated changes in the expectations of investors or securities analysts;

• litigation or investigations involving us, our industry, or both;

• regulatory developments in the United States, foreign countries or both;

• general economic conditions and trends;

• major catastrophic events;

• sales of large blocks of our common stock; or

• departures of key personnel.

In addition, if the market for technology stocks or the stock market in general experiences a loss of investor confidence, the trading price of our common stock could decline for reasons unrelated to our business, results of operations or financial condition. The trading price of our common stock might also decline in reaction to events that affect other companies in our industry even if these events do not directly affect us. In the past, following periods of volatility in the market price of a company’s securities, securities class action litigation has often been brought against that company. The price of our common stock has been highly volatile since our initial public offering (“IPO”) in March 2014. In January 2015, several substantially identical putative class action lawsuits alleging violations of securities laws were filed against us, our directors and certain of our executive officers and in June 2015, a related shareholder derivative action was filed. The consolidated securities class actions and the derivative action were settled in 2016 and dismissed in the first quarter of 2017. In March 2018, a putative class action lawsuit alleging violations of securities laws was filed against us and certain of our current and former executive officers, and in May 2018, a related shareholder derivative action was filed. In March 2018, the United States Securities and Exchange Commission began a private investigation into any securities laws violations by us or persons currently or formerly affiliated with us. Current or future securities litigation, including any related shareholder derivative litigation or investigation, could result in substantial costs and divert our management’s attention and resources from our business. This could have a material adverse effect on our business, results of operations and financial condition.

Sales of substantial amounts of our common stock in the public markets, or the perception that such sales might occur, could reduce the price that our common stock might otherwise attain and may dilute your voting power and your ownership interest in us.

Sales of a substantial number of shares of our common stock in the public market, or the perception that such sales could occur, could adversely affect the market price of our common stock and may make it more difficult for you to sell your common stock at a time and price that you deem appropriate. As of June 30, 2019, there were approximately 3.7million vested

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and exercisable options to purchase our common stock, in addition to the 76.1 million common shares outstanding as of such date. All outstanding shares and all shares issuable upon exercise of outstanding and vested options are freely tradable, subject in some cases to volume and other restrictions of Rules 144 and 701 under the Securities Act, as well as our insider trading policy. In addition, holders of certain shares of our outstanding common stock, including an aggregate of 9.5 million shares held by funds affiliated with Summit Partners, L.P. as of June 30, 2019 are entitled to rights with respect to registration of these shares under the Securities Act pursuant to an investors’ rights agreement.

If these holders of our common stock, by exercising their registration rights, sell a large number of shares, they could adversely affect the market price for our common stock. If we file a registration statement for the purposes of selling additional shares to raise capital and are required to include shares held by these holders pursuant to the exercise of their registration rights, our ability to raise capital may be impaired. Sales of substantial amounts of our common stock in the public market, or the perception that these sales could occur, could cause the market price of our common stock to decline.

We are an emerging growth company, and any decision on our part to comply only with certain reduced disclosure requirements applicable to emerging growth companies could make our common stock less attractive to investors.

We are an emerging growth company, and, for as long as we continue to be an emerging growth company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public companies but not to “emerging growth companies,” including, but not limited to, not being required to have our independent registered public accounting firm audit our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. We could be an emerging growth company for up to five years following the completion of our initial public offering. We will remain an emerging growth company until the earliest of: (a) the last day of the year (i) following the fifth anniversary of the completion of the initial public offering, (ii) in which we have total annual gross revenue of at least $1.07 billion, or (iii) in which we qualify as a large accelerated filer, which means the market value of our common stock that is held by non-affiliates exceeds $700 million as of the prior June 30, or (b) the date on which we have issued more than $1.0 billion in non-convertible debt securities during the prior three-year period. We cannot predict if investors will find our common stock less attractive if we choose to rely on these exemptions. If some investors find our common stock less attractive as a result of any choices to reduce future disclosure, there may be a less active trading market for our common stock and the price of our common stock may be more volatile.

Under the JOBS Act, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have irrevocably elected not to avail ourselves of this accommodation allowing for delayed adoption of new or revised accounting standards, and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not emerging growth companies.

Effective December 31, 2019, we will no longer be an “emerging growth company,” and the reduced disclosure requirements applicable to “emerging growth companies” will no longer apply, which will increase our costs as a result of compliance requirements with Section 404 of the Sarbanes-Oxley Act and increased demands on management.

Effective December 31, 2019, we will lose our status as an “emerging growth company” as defined in the JOBS Act. As such, we will incur significant additional expenses that we did not previously incur in complying with the Sarbanes-Oxley Act and rules implemented by the SEC. Once we are no longer an “emerging growth company,” the cost of compliance with Section 404 will require us to incur substantial accounting expense and expend significant management time on compliance-related issues as we implement additional corporate governance practices and comply with reporting requirements. Moreover, if we or our independent registered public accounting firm deems current or future deficiencies in our internal control over financial reporting to be material weaknesses, we may be required to make prospective or retroactive changes to our financial statements, consider other areas for further attention or improvement, or be unable to obtain the required attestation in a timely manner, if at all. In addition, the market price of our stock could decline and we could be subject to sanctions or investigations by the SEC or other regulatory authorities, which would require additional financial and management resources.

We are obligated to implement and maintain effective internal control over financial reporting. As of December 31, 2018 and December 31, 2017, we concluded that our internal control over financial reporting was not effective. In the future, we may again not complete our analysis of our internal control over financial reporting in a timely manner, or our internal control over financial reporting may not be determined to be effective, or we may discover significant deficiencies or material weaknesses in our internal control over financial reporting, all of which may adversely affect investor confidence in our company and, as a result, the value of our common stock.

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We are required, pursuant to the Exchange Act, to furnish a report by management on, among other things, the effectiveness of our internal control over financial reporting for each fiscal year. This assessment will need to include disclosure of any material weaknesses identified by our management in our internal control over financial reporting.

We have, in the past, experienced and are currently experiencing issues with our internal control over financial reporting. We have discovered and it is possible that we may discover in the future significant deficiencies or material weaknesses in our internal control over financial reporting. Current significant deficiencies and material weaknesses have resulted in a restatement of certain of our financial reports, as disclosed in Part I, Item 4, “Controls and Procedures,” of this report. If, in any future reporting periods, we are unable to conclude that our internal control over financial reporting is effective, or if we are required to restate our financial statements as a result of ineffective internal control over financial reporting, we could lose investor confidence in the accuracy and completeness of our financial reports, which would cause the price of our common stock to decline.

We are required to disclose material changes made in our internal control and procedures on a quarterly basis. However, our independent registered public accounting firm will not be required to attest to the effectiveness of our internal control over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act until December 31, 2019, when we will no longer be an emerging growth company as defined in the JOBS Act, if we take advantage of the exemptions contained in the JOBS Act. To comply with these requirements, we may need to undertake various actions, such as implementing new internal controls and procedures and hiring accounting or internal audit staff.

If securities or industry analysts do not publish research or reports about our business, or publish inaccurate or unfavorable research reports about our business, our share price and trading volume could decline.

The market for our common stock, to some extent, depends on the research and reports that securities or industry analysts publish about us or our business. We do not have any control over these analysts. If one or more of the analysts who cover us should downgrade our shares or change their opinion of our shares, our share price would likely decline. If one or more of these analysts should cease coverage of our company or fail to regularly publish reports on us, we could lose visibility in the financial markets, which would cause our share price or trading volume to decline.

Our charter documents and Delaware law could discourage takeover attempts and lead to management entrenchment.

Our restated certificate of incorporation and bylaws contain provisions that could delay or prevent a change in control of our company. These provisions could also make it difficult for stockholders to elect directors that are not nominated by the current members of our board of directors or take other corporate actions, including effecting changes in our management. These provisions include:

• a classified board of directors with three-year staggered terms, with declassification phasing in over a period of three years, beginning with our 2018 annual meeting of stockholders, which could delay the ability of stockholders to change the membership of a majority of our board of directors until our board of directors is completely declassified;

• the ability of our board of directors to issue shares of preferred stock and to determine the price and other terms of those shares, including preference and voting rights, without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquirer;

• the exclusive right of our board of directors to elect a director to fill a vacancy created by the expansion of our board of directors or the resignation, death or removal of a director, which prevents stockholders from being able to fill vacancies on our board of directors;

• a prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special meeting of our stockholders;

• the requirement that a special meeting of stockholders may be called only by the chairman of our board of directors, our Chief Executive Officer, our secretary, or a majority vote of our board of directors, which could delay the ability of our stockholders to force consideration of a proposal or to take action, including the removal of directors;

• the requirement for the affirmative vote of holders of at least 66-2/3% of the voting power of all of the then-outstanding shares of the voting stock, voting together as a single class, to amend the provisions of our restated certificate of incorporation relating to the issuance of preferred stock and management of our business or our bylaws, which may inhibit the ability of an acquirer to effect such amendments to facilitate an unsolicited takeover attempt;

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• the ability of our board of directors, by majority vote, to amend the bylaws, which may allow our board of directors to take additional actions to prevent an unsolicited takeover and inhibit the ability of an acquirer to amend the bylaws to facilitate an unsolicited takeover attempt; and

• advance notice procedures with which stockholders must comply to nominate candidates to our board of directors or not to propose matters to be acted upon at a stockholders’ meeting, which may discourage or deter a potential acquirer from conducting a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain control of us.

In addition, as a Delaware corporation, we are subject to Section 203 of the Delaware General Corporation Law. These provisions may prohibit large stockholders, in particular those owning 15% or more of our outstanding voting stock, from merging or combining with us for a certain period of time.

Our business is subject to the risks of earthquakes, fire, power outages, floods, and other catastrophic events, and to interruption by man-made problems such as acts of war and terrorism.

A significant natural disaster, such as an earthquake, fire, a flood, or significant power outage could have a material adverse impact on our business, operating results, and financial condition. Our corporate headquarters are located in the San Francisco Bay Area, a region known for seismic activity. In addition, our two primary manufacturers are located in Taiwan, which is near major earthquake fault lines and subject to typhoons during certain times of the year. In the event of a major earthquake or typhoon, or other natural or man-made disaster, our manufacturers in Taiwan may face business interruptions, which may impact quality assurance, product costs, and product supply and timing. In the event our or our service providers’ information technology systems or manufacturing or logistics abilities are hindered by any of the events discussed above, shipments could be delayed, resulting in missed financial targets, such as revenue and shipment targets, and our operations could be disrupted, for the affected quarter or quarters. In addition, cyber security attacks, acts of war or terrorism, or other geo-political unrest could cause disruptions in our business or the business of our supply chain, manufacturers, logistics providers, partners, or end-customers or the economy as a whole. Any disruption in the business of our supply chain, manufacturers, logistics providers, partners or end-customers that impacts sales at the end of a quarter could have a significant adverse impact on our quarterly results. All of the aforementioned risks may be further increased if the disaster recovery plans for us and our suppliers prove to be inadequate. To the extent that any of the above should result in delays or cancellations of customer orders, or the delay in the manufacture, deployment or shipment of our products, our business, financial condition and operating results would be adversely affected.

We do not intend to pay dividends for the foreseeable future.

We intend to retain any earnings to finance the operation and expansion of our business, and we do not anticipate paying any cash dividends in the future. In addition, the 2016 Credit Facility currently restricts our ability to pay cash dividends while this facility remains outstanding. As a result, you may only receive a return on your investment in our common stock if the value of our common stock increases.

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

None.

ITEM 3. DEFAULT UPON SENIOR SECURITIES

Not applicable.

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ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

Not applicable.

ITEM 6. EXHIBITS

Incorporated herein by reference is a list of the exhibits contained in the Exhibit Index below.

EXHIBIT INDEX

Exhibit Number	Description
3.2	Amended and Restated Bylaws of A10 Networks, Inc.
10.1	Sublease Agreement, dated May 2, 2019, by and between Marvell Corporation andA10 Networks, Inc.
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act
32.1*	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act
32.2*	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act
101.INS	XBRL Instant Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Extension Calculation Linkbase Document
101.DEF	XBRL Extension Definition Linkbase Document
101.LAB	XBRL Extension Labels Linkbase Document
101.PRE	XBRL Extension Presentation Linkbase Document

* The certifications attached as Exhibit 32.1 and 32.2 that accompany this Quarterly Report on Form 10‑Q are not deemed filed with the Securities and Exchange Commission and are not to be incorporated by reference into any filing of A10 Networks, Inc. under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Quarterly Report on Form 10‑Q, irrespective of any general incorporation language contained in such filing.

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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.

A10 NETWORKS, INC.

Date: August 2, 2019

By: /s/ Lee Chen

Lee Chen

Chief Executive Officer and President

(Principal Executive Officer)

Date: August 2, 2019

By: /s/ Tom Constantino

Tom Constantino

Executive Vice President and Chief Financial Officer

(Principal Accounting and Financial Officer)

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