10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended April 1, 2023

or

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

For the transition period from              to             

Commission file number: 001-33486

INFINERA CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	77-0560433
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

6373 San Ignacio Avenue

San Jose, CA 95119

(Address of principal executive offices, including zip code)

(408) 572-5200

(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 exchange on which registered
Common stock, par value $0.001 per share	INFN	The Nasdaq Global Select Market

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

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

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

Large accelerated filer	☒	Accelerated Filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

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

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

As of April 28, 2023, 225,615,552 shares of the registrant’s Common Stock, $0.001 par value, were issued and outstanding.

INFINERA CORPORATION

QUARTERLY REPORT ON FORM 10-Q

FOR THE FISCAL QUARTER ENDED APRIL 1, 2023

INDEX

		Page
PART I. FINANCIAL INFORMATION
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	3
	Condensed Consolidated Balance Sheets - As of April 1, 2023 and December 31, 2022	3
	Condensed Consolidated Statements of Operations - Three Months ended April 1, 2023 and March 26, 2022	4
	Condensed Consolidated Statements of Comprehensive Loss - Three Months ended April 1, 2023 and March 26, 2022	5
	Condensed Consolidated Statements of Stockholders' Equity - Three Months ended April 1, 2023 and March 26, 2022	6
	Condensed Consolidated Statements of Cash Flows - Three Months ended April 1, 2023 and March 26, 2022	7
	Notes to Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	37
Item 4.	Controls and Procedures	37
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	39
Item 1A.	Risk Factors	40
Item 6.	Exhibits	71
	Signature Page	72

PART I. FINANCIAL INFORMATION

Item 1.Condensed Consolidated Financial Statements (Unaudited)

INFINERA CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except par values)

(Unaudited)

	April 1, 2023		December 31, 2022
ASSETS
Current assets:
Cash and cash equivalents	$	163,765	$	178,657
Short-term restricted cash	3,873		7,274
Accounts receivable, net	334,434		419,735
Inventory	412,940		374,855
Prepaid expenses and other current assets	155,228		152,451
Total current assets	1,070,240		1,132,972
Property, plant and equipment, net	177,007		172,929
Operating lease right-of-use assets	34,434		34,543
Intangible assets, net	40,661		47,787
Goodwill	233,774		232,663
Long-term restricted cash	2,096		3,272
Other long-term assets	40,174		44,972
Total assets	$	1,598,386	$	1,669,138
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	275,177	$	304,880
Accrued expenses and other current liabilities	120,657		141,450
Accrued compensation and related benefits	59,666		78,849
Short-term debt, net	7,148		510
Accrued warranty	18,296		19,747
Deferred revenue	153,287		158,501
Total current liabilities	634,231		703,937
Long-term debt, net	661,739		667,719
Long-term accrued warranty	17,338		16,874
Long-term deferred revenue	22,263		23,178
Long-term deferred tax liability	2,365		2,348
Long-term operating lease liabilities	44,646		45,862
Other long-term liabilities	29,548		29,573
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value Authorized shares – 25,000 and no shares issued and outstanding	—		—
Common stock, $0.001 par value       Authorized shares – 500,000 as of April 1, 2023       and December 31, 2022       Issued and outstanding shares – 224,832 as of April 1, 2023 and       220,408 as of December 31, 2022	225		220
Additional paid-in capital	1,925,060		1,901,491
Accumulated other comprehensive loss	(31,026)		(22,471)
Accumulated deficit	(1,708,003)		(1,699,593)
Total stockholders' equity	186,256		179,647
Total liabilities and stockholders’ equity	$	1,598,386	$	1,669,138

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

3

INFINERA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

	Three Months Ended
	April 1, 2023		March 26, 2022
Revenue:
Product	$	314,820	$	267,453
Services	77,255		71,421
Total revenue	392,075		338,874
Cost of revenue:
Cost of product	198,674		182,887
Cost of services	42,947		37,959
Amortization of intangible assets	3,556		6,231
Restructuring and other related costs	—		150
Total cost of revenue	245,177		227,227
Gross profit	146,898		111,647
Operating expenses:
Research and development	81,042		73,411
Sales and marketing	41,707		35,824
General and administrative	29,235		27,890
Amortization of intangible assets	3,589		3,746
Restructuring and other related costs	790		7,270
Total operating expenses	156,363		148,141
Loss from operations	(9,465)		(36,494)
Other income (expense), net:
Interest income	471		53
Interest expense	(6,800)		(4,992)
Other gain	10,956		6,020
Total other income, net	4,627		1,081
Loss before income taxes	(4,838)		(35,413)
Provision for income taxes	3,572		6,437
Net loss	$	(8,410)	$	(41,850)
Net loss per common share:
Basic	$	(0.04)	$	(0.20)
Diluted	$	(0.04)	$	(0.20)
Weighted average shares used in computing net loss per common share:
Basic	222,393		212,182
Diluted	222,393		212,182

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

4

INFINERA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(In thousands)

(Unaudited)

	Three Months Ended
	April 1, 2023		March 26, 2022
Net loss	$	(8,410)	$	(41,850)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(7,171)		(11,201)
Actuarial loss on pension liabilities	(447)		—
Amortization of actuarial (gain) loss	(937)		87
Net change in accumulated other comprehensive loss	(8,555)		(11,114)
Comprehensive loss	$	(16,965)	$	(52,964)

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

5

INFINERA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands)

(Unaudited)

	Three Months Ended April 1, 2023
	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Accumulated Deficit		Total Stockholders' Equity
	Shares	Amount
Balance at December 31, 2022	220,408	$	220	$	1,901,491	$	(22,471)	$	(1,699,593)	$	179,647
ESPP shares issued	1,775	2		8,734		—		—		8,736
Restricted stock units released	2,801	3		—		—		—		3
Shares withheld for tax obligations	(152)	—		(1,101)		—		—		(1,101)
Stock-based compensation	—	—		15,936		—		—		15,936
Other comprehensive loss	—	—		—		(8,555)		—		(8,555)
Net loss	—	—		—		—		(8,410)		(8,410)
Balance at April 1, 2023	224,832	$	225	$	1,925,060	$	(31,026)	$	(1,708,003)	$	186,256

	Three Months Ended March 26, 2022
	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Accumulated Deficit		Total Stockholders' Equity
	Shares	Amount
Balance at December 25, 2021	211,381	$	211	$	2,026,098	$	(4,496)	$	(1,698,042)	$	323,771
Cumulative-effect adjustment from adoption of ASU 2020-06				(196,493)				74,492		(122,001)
ESPP shares issued	1,234	1		8,880		—		—		8,881
Restricted stock units released	675	1		—		—		—		1
Shares withheld for tax obligations	(59)	—		(524)		—		—		(524)
Stock-based compensation	—	—		13,041		—		—		13,041
Other comprehensive loss	—	—		—		(11,114)		—		(11,114)
Net loss	—	—		—		—		(41,850)		(41,850)
Balance at March 26, 2022	213,231	$	213	$	1,851,002	$	(15,610)	$	(1,665,400)	$	170,205

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

6

INFINERA CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

	Three Months Ended
	April 1, 2023		March 26, 2022
Cash Flows from Operating Activities:
Net loss	$	(8,410)	$	(41,850)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	19,602		21,572
Non-cash restructuring charges and other related costs	136		5,390
Amortization of debt issuance costs	847		1,060
Operating lease expense	2,148		2,702
Stock-based compensation expense	15,651		12,939
Other, net	(1,037)		789
Changes in assets and liabilities:
Accounts receivable	86,239		81,816
Inventory	(38,555)		(1,979)
Prepaid expenses and other current assets	1,004		(23,481)
Accounts payable	(27,969)		(19,829)
Accrued expenses and other current liabilities	(44,749)		(14,351)
Deferred revenue	(6,676)		(8,990)
Net cash (used in) provided by operating activities	(1,769)		15,788
Cash Flows from Investing Activities:
Purchase of property and equipment	(16,809)		(16,059)
Net cash used in investing activities	(16,809)		(16,059)
Cash Flows from Financing Activities:
Repayment of mortgage payable	(127)		(121)
Payment of debt issuance cost	(154)		—
Payment of term license obligation	(2,323)		(1,418)
Principal payments on finance lease obligations	(227)		(400)
Proceeds from issuance of common stock	8,738		8,875
Tax withholding paid on behalf of employees for net share settlement	(1,100)		(524)
Net cash provided by financing activities	4,807		6,412
Effect of exchange rate changes on cash	(5,698)		(4,634)
Net change in cash, cash equivalents and restricted cash	(19,469)		1,507
Cash, cash equivalents and restricted cash at beginning of period	189,203		202,521
Cash, cash equivalents and restricted cash at end of period(1)	$	169,734	$	204,028
Supplemental disclosures of cash flow information:
Cash paid for income taxes, net	$	1,963	$	1,967
Cash paid for interest	$	10,931	$	7,137
Supplemental schedule of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued liabilities	$	10,229	$	1,477
Transfer of inventory to fixed assets	$	1,099	$	2,037
Unpaid term licenses (included in accounts payable, accrued liabilities and other long-term liabilities)	$	7,134	$	9,290

(1)     Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets:

7

	April 1, 2023		March 26, 2022
Cash and cash equivalents	$	163,765	$	191,937
Short-term restricted cash	3,873		6,528
Long-term restricted cash	2,096		5,563
Total cash, cash equivalents and restricted cash	$	169,734	$	204,028

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

8

INFINERA CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.Basis of Presentation and Significant Accounting Policies

Infinera Corporation (the “Company”) prepared its interim condensed consolidated financial statements that accompany these notes in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), consistent in all material respects with those applied in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

The Company has made certain estimates, assumptions and judgments that can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Estimates, assumptions and judgments made by management include inventory valuation, revenue recognition, accounting for income taxes, stock-based compensation, employee benefit and pension plans, manufacturing partner and supplier liabilities, allowances for sales returns, allowances for credit losses, useful life of intangibles and property, plant and equipment, impairment loss related to lease abandonment, accrued warranty, operating and finance lease liabilities, restructuring and other related costs and loss contingencies. Management believes that the estimates and judgments upon which they rely are reasonable based upon information available to them at the time that these estimates and judgments are made. The Company expects uncertainties around its key accounting estimates to continue to evolve depending on the duration and degree of impact associated with inflation, disruption in the global economy and financial markets and the on-going effects of the coronavirus (“COVID-19”) pandemic. These estimates may change as new events occur and additional information emerges, and such changes are recognized or disclosed in the Company's condensed consolidated financial statements.

The interim financial information is unaudited, but reflects all adjustments that are, in management’s opinion, necessary to provide a fair presentation of results for the interim periods presented. All adjustments are of a normal recurring nature. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company balances and transactions have been eliminated.

This interim information should be read in conjunction with the consolidated financial statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

For the three-month periods ended April 1, 2023 and March 26, 2022, no customer accounted for 10% or more of the Company's total revenue.

There have been no material changes in the Company’s significant accounting policies for the three-months ended April 1, 2023 compared to those disclosed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

2.Leases

The Company has operating leases for real estate (facilities) and automobiles. For the three-months ended April 1, 2023 and March 26, 2022, operating lease expense was $3.8 million and $9.3 million, respectively. Included in operating lease expense were rent expense and impairment charges due to restructuring resulting in abandonment of certain lease facilities, amounting to $0.8 million and $5.6 million, for the three-months ended April 1, 2023 and March 26, 2022, respectively.

Variable lease cost, short-term lease cost and sublease income were immaterial during the three-months ended April 1, 2023 and March 26, 2022.

9

The following table presents current and long-term portion of operating lease liabilities as classified in the condensed consolidated balance sheets (in thousands):

	April 1, 2023		December 31, 2022
Accrued expenses and other current liabilities	$	11,582	$	10,948
Other long-term liabilities	44,646		45,862
Total operating lease liability	$	56,228	$	56,810

The Company also has finance leases. The lease term for these arrangements range from three to five years with option to purchase, or ownership transferring at the end of the term. As of April 1, 2023 and December 31, 2022, finance leases included in property, plant, and equipment, net in the condensed consolidated balance sheets were $2.0 million and $1.9 million, respectively. Finance lease expense includes amortization of the right-of-use assets and interest expense. Total finance lease expense during the three-month periods ended April 1, 2023 and March 26, 2022 was not material.

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table presents supplemental information for the Company's non-cancelable leases for the three-months ended April 1, 2023 (in thousands, except for weighted average and percentage data):

	Operating Lease			Finance Lease
Weighted average remaining lease term	5.16 years			1.32 years
Weighted average discount rate	9.29		%	7.82		%
Cash paid for amounts included in the measurement of lease liabilities	$	4,045		$	227
Leased assets obtained in exchange for new lease liabilities	$	1,846		$	208

10

3.Revenue Recognition

Disaggregation of Revenue

The following table presents the Company's revenue disaggregated by geography, based on the shipping address of the customer (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
United States	$	237,035	$	170,185
Other Americas	20,555		20,911
Europe, Middle East and Africa	93,250		108,611
Asia Pacific	41,235		39,167
Total revenue	$	392,075	$	338,874

The Company sells its products directly to customers who are predominantly service providers and to channel partners that sell on its behalf.

The following table presents the Company's revenue disaggregated by sales channel (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Direct	$	262,862	$	260,892
Indirect	129,213		77,982
Total revenue	$	392,075	$	338,874

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers (in thousands):

	April 1, 2023		December 31, 2022
Assets (Liabilities)
Accounts receivable, net	$	334,434	$	419,735
Contract assets	$	65,174	$	60,172
Deferred revenue	$	(175,550)	$	(181,679)

Revenue recognized for the three-months ended April 1, 2023 that was included in the deferred revenue balance at the beginning of the reporting period was $50.9 million. Revenue recognized for the three-months ended March 26, 2022 that was included in the deferred revenue balance at the beginning of the reporting period was $44.9 million. Changes in the contract asset and liability balances during the three-month periods ended April 1, 2023 and March 26, 2022 were not materially impacted by other factors.

11

Transaction Price Allocated to the Remaining Performance Obligation

The Company’s remaining performance obligations represent the transaction price allocated to performance obligations that are unsatisfied or partially satisfied, consisting of deferred revenue and backlog. The Company’s backlog represents purchase orders received from customers for future product shipments and services. The Company’s backlog is subject to future events that could cause the amount or timing of the related revenue to change, and, in certain cases, may be canceled without penalty. Orders in backlog may be fulfilled several quarters following receipt or may relate to multi-year support service obligations.

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially satisfied) pursuant to contracts that are not subject to cancellation without penalty at the end of the reporting period (in thousands):

	Remainder of 2023		2024		2025		2026		2027		Thereafter		Total
Revenue expected to be recognized in the future as of April 1, 2023	$	594,213	$	238,535	$	47,156	$	10,664	$	5,731	$	6,427	$	902,726

12

4.Fair Value Measurements

Disclosure of Fair Values

Financial instruments that are not re-measured at fair value include accounts receivable, accounts payable, accrued liabilities, and debt. The carrying values of these financial instruments other than the Company's 2024 Notes, 2027 Notes and 2028 Notes (as defined below and collectively referred to as "convertible senior notes") approximate their fair values. The fair value of convertible senior notes was determined based on the quoted bid price of the convertible senior notes in an over-the-counter market on March 31, 2023 (the last trading day of the quarter).

The following table presents the estimated fair values of the convertible senior notes (in thousands): 

	As of April 1, 2023					As of December 31, 2022
	Fair Value Measured Using					Fair Value Measured Using
	Level 1		Level 2	Total		Level 1		Level 2		Total
Convertible senior notes	$	—	$855,088	$	855,088	$	—	$	785,364	$	785,364

Cash equivalents are measured and reported at fair value on a recurring basis. The following table presents the fair value of these financial assets and their levels within the fair value hierarchy (in thousands):

	As of April 1, 2023						As of December 31, 2022
	Fair Value Measured Using						Fair Value Measured Using
	Level 1		Level 2		Total		Level 1		Level 2		Total
Money market funds	$	85,000	$	—	$	85,000	$	95,000	$	—	$	95,000

During the three-months ended April 1, 2023, there were no transfers of assets or liabilities between Level 1 and Level 2 of the fair value hierarchy. As of each of April 1, 2023 and December 31, 2022, none of the Company’s existing assets or liabilities were classified as Level 3.

The Company measures goodwill and intangible assets at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. The Company performed an analysis of impairment indicators of these assets and noted no adverse impact to their fair values as of April 1, 2023.    

Facilities-related Charges

The Company classifies certain facilities-related charges within Level 3 of the fair value hierarchy and applies fair value accounting on a nonrecurring basis when impairment indicators exist or upon the existence of observable fair values.

In connection with its restructuring plans (as discussed in Note 7, “Restructuring and Other Related Costs” to the notes to condensed consolidated financial statements), the Company incurred facilities-related charges of $0.8 million and $5.6 million for the three-months ended April 1, 2023 and March 26, 2022, respectively. These charges primarily consisted of impairment charges incurred for operating lease right-of-use assets and were calculated at fair value based on estimated future sublease rental receipts that the Company could reasonably obtain over the remaining lease term at the discount rate. Facilities-related charges are classified as Level 3 measurement due to the significance of these unobservable inputs.

13

Cash and Cash Equivalents

As of April 1, 2023, the Company had $169.7 million of cash, cash equivalents and restricted cash, including $65.1 million of cash held by its foreign subsidiaries.

As of December 31, 2022, the Company had $189.2 million of cash, cash equivalents and restricted cash, including $65.9 million of cash held by its foreign subsidiaries.

The Company's cash held by its foreign subsidiaries is used for operating and investing activities in those locations, and the Company does not currently have the need or the intent to repatriate those funds to the United States.

14

5.Goodwill and Intangible Assets

Goodwill

Goodwill is recorded when the purchase price of an acquisition exceeds the fair value of the net tangible and identified intangible assets acquired.

The following table presents details of the Company’s goodwill during the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	232,663
Foreign currency translation adjustments	1,111
Balance as of April 1, 2023	$	233,774

The gross carrying amount of goodwill may change due to the effects of foreign currency fluctuations as a portion of these assets are denominated in foreign currency. To date, the Company has not recognized any impairment losses on goodwill.

Intangible Assets

The following tables present details of the Company’s intangible assets as of April 1, 2023 and December 31, 2022 (in thousands, except for weighted average data):

	April 1, 2023
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	112,550	$	(78,954)	$	33,596	3.3
Developed technology	153,312		(146,247)		7,065		0.5
Total intangible assets with finite lives	$	265,862	$	(225,201)	$	40,661

	December 31, 2022
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	151,461	$	(114,294)	$	37,167	3.5
Developed technology	170,467		(159,847)		10,620		0.7
Total intangible assets with finite lives	$	321,928	$	(274,141)	$	47,787

The gross carrying amount of intangible assets and the related amortization expense of intangible assets may change due to the effects of foreign currency fluctuations as a portion of these assets are denominated in foreign currency. Amortization expenses were $7.1 million and $10.0 million for the three-month periods ended April 1, 2023 and March 26, 2022, respectively.

Intangible assets are carried at cost less accumulated amortization and impairment, if any. Amortization expenses are recorded to the appropriate cost and expense categories.

The following table summarizes the Company’s estimated future amortization expense of intangible assets with finite lives as of April 1, 2023 (in thousands):

			Fiscal Years
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Total future amortization expense	$	40,661	$	15,843	$	9,025	$	9,025	$	6,768	$	—	$	—

15

6.Balance Sheet Details

Restricted Cash

The Company’s restricted cash balance is held in deposit accounts at various banks globally. These amounts primarily collateralize the Company’s issuances of standby letters of credit and bank guarantees.

Allowance for Credit Losses

The following table provides a rollforward of the allowance for credit losses for accounts receivable for the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	1,422
Additions(1)	266
Write offs(2)	(356)
Recoveries during the period	(322)
Other(3)	2
Balance as of April 1, 2023	$	1,012

(1)The new additions during the three-months ended April 1, 2023 are primarily due to specific reserves.

(2)The write offs during the three-months ended April 1, 2023 are primarily amounts fully reserved previously.

(3)Primarily represents foreign currency translation adjustments.

Accounts Receivable Factoring

The Company sells certain designated trade account receivables based on factoring arrangements with well-established factoring companies. Pursuant to the terms of the arrangements, the Company accounts for these transactions in accordance with ASC Topic 860, "Transfers and Servicing". The Company's factor purchases trade accounts receivables on a non-recourse basis and without any further obligations. Trade accounts receivables balances sold are removed from the condensed consolidated balance sheets and cash received is reflected as cash provided by operating activities in the condensed consolidated statements of cash flows. The difference between the fair value of the Company's trade receivables and the proceeds received is recorded as interest expense in the Company's condensed consolidated statements of operations. For the three-months ended April 1, 2023 and March 26, 2022, the Company's recognized factoring related interest expense was approximately $0.3 million and $0.1 million, respectively. For the three-months ended April 1, 2023 and March 26, 2022, the Company's gross amount of trade accounts receivables sold were approximately $21.2 million and $24.0 million, respectively.

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Selected Balance Sheet Items

The following table provides details of selected balance sheet items (in thousands):

	April 1, 2023		December 31, 2022
Inventory
Raw materials	$	67,601	$	48,688
Work in process	71,750		66,591
Finished goods	273,589		259,576
Total inventory	$	412,940	$	374,855
Property, plant and equipment, net
Computer hardware	$	47,514	$	46,454
Computer software(1)	58,867		62,102
Laboratory and manufacturing equipment	306,600		297,261
Land and building	12,372		12,369
Furniture and fixtures	2,862		2,828
Leasehold and building improvements	50,042		50,360
Construction in progress	48,702		42,418
Subtotal	526,959		513,792
Less accumulated depreciation and amortization(2)	(349,952)		(340,863)
Total property, plant and equipment, net	$	177,007	$	172,929
Accrued expenses and other current liabilities
Loss contingency related to non-cancelable purchase commitments	$	22,881	$	28,796
Taxes payable	41,676		42,757
Short-term operating and finance lease liability	12,364		11,701
Restructuring accrual	397		941
Other accrued expenses and other current liabilities	43,339		57,255
Total accrued expenses	$	120,657	$	141,450

(1)Included in computer software at April 1, 2023 and December 31, 2022 were $30.2 million and $29.3 million, respectively, related to enterprise resource planning (“ERP”) systems that the Company implemented. The unamortized ERP costs at April 1, 2023 and December 31, 2022 were $8.9 million and $9.0 million, respectively. Also included in computer software at April 1, 2023 and December 31, 2022 was $19.3 million and $24.2 million, respectively, related to term licenses. The unamortized term license costs at April 1, 2023 and December 31, 2022 was $7.1 million and $9.1 million, respectively.

(2)Depreciation expense was $12.5 million and $11.6 million (which includes depreciation of capitalized ERP cost of $0.9 million and $0.8 million, respectively) for the three-months ended April 1, 2023 and March 26, 2022, respectively. Also included in depreciation expense for three-months ended April 1, 2023 and March 26, 2022 was $2.2 million and $1.7 million, respectively, related to term licenses.

7.Restructuring and Other Related Costs

In 2021, the Company announced a plan to restructure certain international research and development operations (the "2021 Restructuring Plan"). The 2021 Restructuring Plan is substantially completed with the associated payments made in 2022. Additional restructuring activities may occur in the future in connection with the Company’s ongoing transformation initiatives.

In the three-month periods ended April 1, 2023 and March 26, 2022, the Company incurred lease-related impairment charges from consolidation of various sites that resulted in abandonment of related leased facilities. This was a result of restructuring initiatives undertaken in previous years.

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The following table presents restructuring and other related costs included in cost of revenue and operating expenses in the accompanying condensed consolidated statements of operations under the restructuring plans (in thousands):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Cost of Revenue		Operating Expenses		Cost of Revenue		Operating Expenses
Severance and other related expenses	$	—	$	—	$	140	$	1,461
Lease related impairment charges	—		786		—		5,641
Others	—		4		10		168
Total	$	—	$	790	$	150	$	7,270

Restructuring liabilities are reported within accrued expenses and other long-term liabilities in the accompanying condensed consolidated balance sheets (in thousands):

	Severance and other related expenses		Lease related impairment charges		Others		Total
Balance at December 31, 2022	$	792	$	—	$	149	$	941
Charges	—		786		4		790
Cash Payments	(562)		(633)		(4)		(1,199)
Non-Cash Settlements and Other	15		(153)		3		(135)
Balance at April 1, 2023	$	245	$	—	$	152	$	397

As of April 1, 2023, the Company's restructuring liability was primarily comprised of $0.3 million related to the 2021 Restructuring Plan and $0.1 million related to assumed restructuring liabilities associated with Coriant's previous restructuring and reorganization plans, which was substantially completed in previous years. The liability related to the 2021 Restructuring Plan is expected to be paid by the end of 2023.

8.Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain changes in equity that are excluded from net loss. The following table sets forth the changes in accumulated other comprehensive loss by component for the three-months ended April 1, 2023 (in thousands): 

	Foreign Currency Translation		Actuarial Gain (Loss) on Pension		Total
Balance at December 31, 2022	$	(49,632)	$	27,161	$	(22,471)
Other comprehensive loss before reclassifications	(7,171)		(447)		(7,618)
Amounts reclassified from accumulated other comprehensive loss	—		(937)		(937)
Net current-period other comprehensive loss	(7,171)		(1,384)		(8,555)
Balance at April 1, 2023	$	(56,803)	$	25,777	$	(31,026)

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9.Basic and Diluted Net Loss Per Common Share

Basic net loss per common share is computed by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted net loss per common share is computed using net loss and the weighted average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Potentially dilutive common shares include the assumed release of outstanding restricted stock units (“RSUs”) and performance shares (referred to herein as the “PSUs”), assumed issuance of common stock under the Company’s 2007 Employee Stock Purchase Plan (the “ESPP”) using the treasury stock method, and shares of common stock issuable upon conversion of convertible senior notes. The Company includes the common shares underlying PSUs in the calculation of diluted net income per common share only when they become contingently issuable. As the Company incurred net losses during the three-month periods ended April 1, 2023 and March 26, 2022, all potentially issuable shares of common stock were determined to be anti-dilutive.

The following table sets forth the computation of net loss per common share – basic and diluted (in thousands, except per share amounts):

	Three Months Ended
	April 1, 2023		March 26, 2022
Net loss	$	(8,410)	$	(41,850)
Weighted average common shares outstanding - basic and diluted	222,393		212,182
Net loss per common share - basic and diluted	$	(0.04)	$	(0.20)

The following sets forth the potentially dilutive shares excluded from the computation of the diluted net loss per share because their effect was anti-dilutive (in thousands):

	Three Months Ended
	April 1, 2023	March 26, 2022
Convertible senior notes	40,100	69,930
Restricted stock units	15,582	17,887
Performance stock units	3,685	2,824
Employee stock purchase plan shares	—	1,095
Total	59,367	91,736

The Company uses the if-converted method for calculating any potential dilutive effect of the convertible senior notes. The Company calculates diluted earnings per share assuming that all of the convertible senior notes permitted to be share settled were converted solely into shares of common stock at the beginning of the reporting period. The potential impact upon the conversion of the convertible senior notes was excluded from the calculation of diluted net loss per share for the three-month periods ended April 1, 2023 and March 26, 2022, because the effect would have been anti-dilutive.

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10.Debt

The following is a summary of the Company's debt as of April 1, 2023 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.9	$	102.7	September 2024
2027 Notes	—		196.1		200.0		March 2027
2028 Notes	—		363.7		373.8		August 2028
Mortgage	7.1		—		7.1		March 2024
Total Debt	$	7.1	$	661.7	$	683.6

The following is a summary of the Company's debt as of December 31, 2022 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.7	$	102.7	September 2024
2027 Notes	—		195.9		200.0		March 2027
2028 Notes	—		363.3		373.8		August 2028
Mortgage	0.5		6.8		7.3		March 2024
Total Debt	$	0.5	$	667.7	$	683.8

Convertible Senior Notes

In September 2018, the Company issued $402.5 million aggregate principal amount of 2.125% Convertible Senior Notes due 2024 (the "2024 Notes"). In March 2020, the Company issued $200.0 million aggregate principal amount of 2.5% Convertible Senior Notes due 2027 (the “2027 Notes"). In August 2022, the Company issued $373.8 million aggregate principal amount of 3.75% Convertible Senior Notes due 2028 (the "2028 Notes," and together with the 2024 Notes and 2027 Notes, the “convertible senior notes”). The 2024 Notes bear interest at a fixed rate of 2.125% per year, payable semi-annually in arrears on March 1 and September 1 of each year, beginning on March 1, 2019. The 2027 Notes bear interest at a fixed rate of 2.5% per year, payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2020. The 2028 Notes bear interest at a fixed rate of 3.75% per year, payable semi-annually in arrears on February 1 and August 1 of each year, beginning on February 1, 2023. No sinking fund is provided for the convertible senior notes.

There have been no changes to the initial conversion price of the convertible senior notes since issuance and during the three-months ended April 1, 2023. None of the conditions allowing holders of the convertible senior notes to convert early were met. The convertible senior notes were therefore not convertible during the three-months ended April 1, 2023.

Interest Expense

The following table presents the interest expense related to the contractual interest coupon and the amortization of debt issuance costs on the Company's convertible senior notes (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Contractual interest expense	$	5,299	$	3,388
Amortization of debt issuance costs	785		767
Total interest expense	$	6,084	$	4,155

The issuance cost related to the 2024 Notes, the 2027 Notes and the 2028 Notes are being amortized to interest expense over the respective contractual term, at effective interest rates of 2.7%, 3.0% and 4.3%, respectively. Unamortized debt issuance costs will be amortized over the remaining life of the 2024 Notes, the 2027 Notes and the 2028 Notes which is approximately 17 months, 47 months, and 64 months, respectively.

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The net carrying amount of the convertible senior notes as of April 1, 2023 and as of December 31, 2022 was as follows (in thousands):

	2024 Notes				2027 Notes				2028 Notes
	April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022
Principal	$	102,652	$	102,652	$	200,000	$	200,000	$	373,650	$	373,750
Unamortized issuance costs	(789)		(926)		(3,887)		(4,121)		(9,987)		(10,401)
Net carrying amount	$	101,863	$	101,726	$	196,113	$	195,879	$	363,663	$	363,349

Asset-based revolving credit facility

On June 24, 2022, the Company entered into a Loan, Guaranty and Security Agreement (the “Loan Agreement”) with the lenders party thereto, and Bank of America, N.A., as agent. The Loan Agreement provides for a senior secured asset-based revolving credit facility of up to $200 million (the "Credit Facility"), which the Company may draw upon from time to time. The Company may increase the total commitments under the revolving credit facility by up to an additional $100 million, subject to certain conditions. In addition, the Loan Agreement provides for a $50 million letter of credit subfacility and a $20 million swingline loan facility.

The proceeds of the loans under the Loan Agreement may be used to pay the fees, costs, and expenses incurred in connection with the Loan Agreement, repay existing debt and for working capital and general corporate purposes, including to fund growth. The Credit Facility has a stated maturity date of June 24, 2027. Availability under the Credit Facility will be based upon periodic borrowing base certifications valuing certain inventory and accounts receivable, as reduced by certain reserves. The Credit Facility is secured by a first-priority security interest (subject to certain exceptions) in inventory, certain related assets, specified deposit accounts, and certain other accounts.

Outstanding borrowings accrue interest at floating rates plus an applicable margin of 1.25% to 1.75% for Term Secured Overnight Financing Rate ("SOFR") rate loans and 0.25% to 0.75% for base rate loans. The unused line fee rate payable on the unused portion of the Credit Facility is equal to 0.25% per annum based on utilization of the Credit Facility.

The Loan Agreement contains customary affirmative covenants, such as financial statement reporting requirements and delivery of borrowing base certificates. The Loan Agreement also contains customary covenants that limit the ability of the Company to, among other things, incur debt, create liens and encumbrances, engage in certain fundamental changes, dispose of assets, prepay certain indebtedness, make restricted payments, make investments, and engage in transactions with affiliates. The Loan Agreement also contains a financial covenant that requires the Company to maintain a minimum fixed charge coverage ratio. As of April 1, 2023, the Company was in compliance with all covenants under the Loan Agreement.

In connection with the Credit Facility, the Company incurred lender and other third-party costs of approximately $1.2 million, which are recorded as a deferred asset and will be amortized to interest expense using a straight-line method over the term of the Credit Facility.

As of April 1, 2023, the Company had availability of $133.4 million under the Credit Facility. As of April 1, 2023, the Loan Agreement included a $50.0 million letter of credit subfacility and $19.1 million letters of credit issued and outstanding.

Mortgage Payable

In March 2019, the Company mortgaged a property it owns. The Company received proceeds of $8.7 million in connection with the loan. The loan carries a fixed interest rate of 5.25% and is repayable in 59 equal monthly installments of principal balance plus accrued unpaid interest due five years from the date of the loan.

On September 24, 2021, the loan was amended to reduce the interest rate from 5.25% to 3.80% for the remaining 31 equal monthly installments of approximately $0.1 million each.

As of April 1, 2023, $7.1 million of the loan remained outstanding and is included in short-term debt, net in the condensed consolidated balance sheets.

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11.Commitments and Contingencies

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Legal Matters

NextGen Innovations, LLC

On August 9, 2022, NextGen Innovations, LLC ("NextGen") filed a complaint against the Company in the United States District Court for the Eastern District of Texas. The complaint asserts that through certain products the Company infringed on U.S. Patent Nos. 9,887,795, 10,263,723, and 10,771,181. The complaint alleges that NextGen is entitled to unspecified damages, costs, fees, expenses, interest, and injunctive relief. The Company is currently unable to predict the outcome of this litigation and therefore cannot reasonably estimate the possible loss or range of loss, if any, arising from this matter.

In addition to the matter described above, the Company is subject to various legal proceedings, claims and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, the Company does not expect that the ultimate costs to resolve these matters will have a material effect on its condensed consolidated financial position, results of operations or cash flows.

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Loss Contingencies

The Company is subject to the possibility of various losses arising in the ordinary course of business. These may relate to disputes, litigation and other legal actions. In the preparation of its quarterly and annual financial statements, the Company considers the likelihood of loss or the incurrence of a liability, including whether it is probable, reasonably possible or remote that a liability has been incurred, as well as the Company’s ability to reasonably estimate the amount of loss, in determining loss contingencies. In accordance with U.S. GAAP, an estimated loss contingency is accrued when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company regularly evaluates current information to determine whether any accruals should be adjusted and whether new accruals are required. As of each of April 1, 2023 and December 31, 2022, the Company has accrued the estimated liabilities associated with certain loss contingencies.

Indemnification Obligations

From time to time, the Company enters into certain types of contracts that contingently require it to indemnify parties against third-party claims. The terms of such indemnification obligations vary. These contracts may relate to: (i) certain real estate leases under which the Company may be required to indemnify property owners for environmental and other liabilities, and other claims arising from the Company’s use of the applicable premises; and (ii) certain agreements with the Company’s officers, directors and certain key employees, under which the Company may be required to indemnify such persons for liabilities.

In addition, the Company has agreed to indemnify certain customers for claims made against the Company’s products, where such claims allege infringement of third-party intellectual property rights, including, but not limited to, patents, registered trademarks, and/or copyrights. Under the aforementioned intellectual property indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim as well as the customer’s attorneys’ fees and costs. These indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. In certain cases, there are limits on and exceptions to the Company’s potential liability for indemnification. The Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant.

As permitted under Delaware law and the Company’s charter and bylaws, the Company has agreements whereby it indemnifies certain of its officers and each of its directors. The term of the indemnification period is for the officer’s or director’s lifetime for certain events or occurrences while the officer or director is, or was, serving at the Company’s request in such capacity. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements could be significant; however, the Company has a director and officer insurance policy that may reduce its exposure and enable it to recover all or a portion of any future amounts paid. As a result of its insurance policy coverage, the Company believes the estimated fair value of these indemnification agreements is minimal.

12.Stockholders’ Equity

2016 Equity Incentive Plan and Employee Stock Purchase Plan

In February of 2007, the Company's board of directors adopted the ESPP and the Company's stockholders approved the ESPP in May of 2007. The ESPP was last amended by the Company's stockholders in May 2019 to increase the shares authorized under the ESPP to a total of approximately 31.6 million shares of common stock. The ESPP has a 20-year term. Eligible employees may purchase the Company’s common stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or the end of six-month offering periods. An employee’s payroll deductions under the ESPP are limited to a maximum of 15% of the employee’s compensation and an employee may not purchase more than 3,000 shares per purchase period.

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In February 2016, the Company's board of directors adopted the 2016 Equity Incentive Plan (the "2016 Plan") and the Company's stockholders approved the 2016 Plan in May 2016. In May 2017, May 2018, May 2019, May 2020, May 2021 and May 2022, the Company's stockholders approved amendments to the 2016 Plan to increase the number of shares authorized for issuance under the 2016 Plan by 6.4 million shares, 1.5 million shares, 7.3 million shares, 8.1 million shares, 4.4 million shares and 8.5 million shares, respectively. As of April 1, 2023, the Company reserved a total of 43.7 million shares of common stock for the award of stock options, RSUs and PSUs to employees, non-employees, consultants and members of the Company's board of directors pursuant to the 2016 Plan, plus any shares subject to awards granted under the 2007 Equity Incentive Plan (the "2007 Plan") that, after the effective date of the 2016 Plan, expire, are forfeited or otherwise terminate without having been exercised in full to the extent such awards were exercisable, and shares issued pursuant to awards granted under the 2007 Plan that, after the effective date of the 2016 Plan, are forfeited to or repurchased by the Company due to failure to vest. The 2016 Plan has a maximum term of 10 years from the date of adoption, or it can be earlier terminated by the Company's board of directors. The 2007 Plan was canceled and there are no outstanding grants under the 2007 Plan.

Stock-based Compensation Plans

As described above, the Company has stock-based compensation plans pursuant to which the Company has granted RSUs and PSUs, as well as an ESPP for all eligible employees.

(in thousands except weighted average data)	Number of Restricted Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	12,588	$	8.13	$	84,847
RSUs granted	5,931	$	7.34
RSUs released	(2,801)	$	8.45	$	20,343
RSUs canceled	(137)	$	8.25
Outstanding at April 1, 2023	15,581	$	7.77	120,914

(in thousands except weighted average data)	Number of Performance Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	2,559	$	7.40	$	17,251
PSUs granted	1,835	$	7.26
PSUs canceled	(708)	$	5.89
Outstanding at April 1, 2023	3,686	$	7.62	$	28,603

The aggregate intrinsic value of unreleased RSUs and unreleased PSUs is calculated using the closing price of the Company's common stock of $7.76 at March 31, 2023 (the last trading day of the quarter). The aggregate intrinsic value of RSUs and PSUs released is calculated using the fair market value of the common stock at the date of release.

The following table presents total stock-based compensation cost for instruments granted but not yet fully amortized, of the Company’s equity compensation plans as of April 1, 2023. These costs are expected to be amortized on a straight-line basis over the following weighted-average periods (in thousands, except for weighted average period data):

	Unrecognized Compensation Expense, Net		Weighted Average Period (in Years)
RSUs	$	105,199	2.33
PSUs	$	26,268	2.11

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Employee Stock Purchase Plan

The fair value of the ESPP shares was estimated at the date of grant using the following assumptions:

	Three Months Ended
	April 1, 2023	March 26, 2022
Volatility	60%	39%
Risk-free interest rate	4.98%	0.67%
Expected life	0.5 years	0.5 years
Estimated fair value	$2.37	$2.21

Stock-based compensation expense related to ESPP for the three-months ended April 1, 2023 was approximately $1.6 million, and for three-months ended March 26, 2022 was approximately $1.3 million.

Restricted Stock Units

Pursuant to the 2016 Plan, the Company has granted RSUs to employees and non-employee members of the Company's board of directors. All RSUs awarded are subject to each individual's continued service to the Company through each applicable vesting date. The Company accounted for the fair value of the RSUs using the closing market price of the Company’s common stock on the date of grant. Amortization of stock-based compensation related to RSUs for the three-months ended April 1, 2023 was approximately $13.0 million, and for the three-months ended March 26, 2022 was approximately $10.9 million.

Performance Stock Units

Pursuant to the 2016 Plan, the Company has granted PSUs to certain of the Company’s executive officers, senior management and certain employees. All PSUs awarded are subject to each individual's continued service to the Company through each applicable vesting date and if the performance metrics are not met within the time limits specified in the award agreements, the PSUs will be canceled.

The following table summarizes by grant year, the Company’s PSU activity for the three-months ended April 1, 2023 (in thousands):

	Total Number of Performance Stock Units	2020	2021	2022	2023
Outstanding at December 31, 2022	2,559	1,058	602	899	—
PSUs granted	1,835	—	—	—	1,835
PSUs canceled	(708)	(708)	—	—	—
Outstanding at April 1, 2023	3,686	350	602	899	1,835

Stock-based compensation expense related to PSUs for the three-month periods ended April 1, 2023 and March 26, 2022 was approximately $1.4 million and $0.9 million, respectively.

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Stock-Based Compensation

The following tables summarize the effects of stock-based compensation on the Company’s condensed consolidated balance sheets and statements of operations for the periods presented (in thousands):

	April 1, 2023		December 31, 2022
Stock-based compensation effects in inventory	$	4,267	$	3,979

	Three Months Ended
	April 1, 2023		March 26, 2022
Income tax benefit associated with stock-based compensation	$	1,984	$	2,226
Stock-based compensation effects in net loss before income taxes
Cost of revenue	$	2,276	$	1,889
Research and development	5,623		4,841
Sales and marketing	3,594		2,767
General and administration	4,158		3,442
Total stock-based compensation expense	$	15,651	$	12,939

13.Income Taxes

Income taxes for the three-months ended April 1, 2023 represented a tax expense of $3.6 million on pre-tax losses of $4.8 million. This compared to a tax expense of $6.4 million on pre-tax losses of $35.4 million for the three-months ended March 26, 2022. Provision for income taxes decreased by approximately $2.8 million for the three-months ended April 1, 2023, compared to the corresponding period in 2022 as a result of a decrease in income taxes and withholding taxes in foreign jurisdictions, primarily driven by elimination of the withholding tax in Germany due to an internal restructuring of the Company's supply chain and customer-facing entities.

The Company must assess the likelihood that some portion or all of its deferred tax assets will be recovered from future taxable income within the respective jurisdictions. In the past, the Company established a valuation allowance against its deferred tax assets as it determined that its ability to recover the value of these assets did not meet the “more-likely-than-not” standard. 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. Management judgment is required on an on-going basis to determine whether it needs to maintain the valuation allowance recorded against its net deferred tax assets. The Company must consider all positive and negative evidence, including its forecasts of taxable income over the applicable carryforward periods, its current financial performance, its market environment and other factors in evaluating the need for a valuation allowance against its net U.S. deferred tax assets. As of April 1, 2023, the Company does not believe that it is more-likely-than-not that it would be able to utilize its domestic deferred tax assets in the foreseeable future. Accordingly, the domestic net deferred tax assets continued to be fully reserved with a valuation allowance. To the extent that the Company determines that deferred tax assets are realizable on a more-likely-than-not basis, and adjustment is needed, that adjustment will be recorded in the period that the determination is made and would generally decrease the valuation allowance and record a corresponding benefit to earnings.

14.Segment Information

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is the Company’s Chief Executive Officer (the "CEO”). The CEO reviews financial information presented on a condensed consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. The Company has one business activity as a provider of optical transport networking equipment, software and related services. Accordingly, the Company is considered a single reporting segment and operating unit structure.

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Revenue by geographic region is based on the shipping address of the customer. For more information regarding revenue disaggregated by geography, see Note 3, “Revenue Recognition” to the notes to condensed consolidated financial statements.

Additionally, the following table sets forth the Company's property, plant and equipment, net by geographic region (in thousands):

	April 1, 2023		December 31, 2022
United States	$	160,032	$	156,065
Other Americas	3,022		2,908
Europe, Middle East and Africa	10,286		10,285
Asia Pacific	3,667		3,671
Total property, plant and equipment, net	$	177,007	$	172,929

15.Guarantees

Product Warranties

Activity related to product warranty was as follows (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Beginning balance	$	36,621	$	44,310
Charges to operations	5,237		5,975
Utilization	(5,194)		(5,709)
Change in estimate(1)	(1,030)		(4,991)
Balance at the end of the period	$	35,634	$	39,585

(1)The Company records product warranty liabilities based on the latest quality and cost information available as of the date the revenue is recorded. The changes in estimate shown here are due to changes in overall actual failure rates, the mix of new compared to used units related to replacement of failed units, and changes in the estimated cost of repair and product recalls. As the Company's products mature over time, failure rates and repair costs associated with such products generally decline, leading to favorable changes in warranty reserves.

Letters of Credit and Bank Guarantees

The Company had $24.5 million and $24.7 million of standby letters of credit, bank guarantees and surety bonds outstanding as of April 1, 2023 and December 31, 2022, respectively. Details are provided in the table below (in thousands).

	April 1, 2023		December 31, 2022
Customer performance guarantees	$	19,406	$	20,903
Value added tax license	2,307		1,434
Property leases	2,769		2,398
Total	$	24,482	$	24,735

Of the $19.4 million related to customer performance guarantees as of April 1, 2023, approximately $4.0 million was used to secure surety bonds in the aggregate of $7.5 million. Of the $20.9 million related to customer performance guarantees as of December 31, 2022, approximately $4.0 million was used to secure surety bonds in the aggregate of $7.5 million.

As of April 1, 2023, of the aforementioned standby letters of credit and bank guarantees outstanding, $5.2 million was backed by cash collateral.

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16.Pension and Post-Retirement Benefit Plans

As a result of the acquisition of Telecom Holding Parent LLC (the "Acquisition"), the Company acquired a number of post-employment plans in Germany, as well as a number of smaller post-employment plans in other countries, including both defined contribution and defined benefit plans. The defined benefit plans expose the Company to actuarial risks such as investment risk, interest rate risk, life expectancy risk and salary risk. The characteristics of the defined benefit plans and the risks associated with them vary depending on legal, fiscal and economic requirements.

Components of Net Periodic Benefit Cost

Net periodic benefit cost for the Company's pension and other post-retirement benefit plans consisted of the following (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Service cost	$	67	$	80
Interest cost	769		333
Expected return on plan assets	(654)		(780)
Amortization of actuarial (gain) loss	(937)		87
Total net periodic benefit cost	$	(755)	$	(280)

The service cost component is included in operating expenses in the Company's condensed consolidated statements of operations. All other components are included in Other income (expense), net in the Company's condensed consolidated statements of operations.

Actuarial gains and losses are amortized using a corridor approach. The gain/loss corridor is equal to 10% of the greater of the pension benefit obligation and the market-related value of assets. Gains and losses in excess of the corridor are generally amortized over the average future working lifetime of the pension plan participants.

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

Note Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains “forward-looking statements” that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. Such forward-looking statements include, but are not limited to, our expectations regarding revenue, gross margin, operating expenses, cash flows and other financial items and the drivers related to these; the proportion of revenue derived from sales of our vertically integrated products; demand growth for additional network capacity and the level and timing of customer capital spending; the magnitude and duration of supply constraints, including delays, shortages and increased costs and our ability to mitigate such supply constraints, and the extent to which supply-related impacts could materially and adversely affect our business operations, financial performance, results of operations, financial position, and stock price; the adverse impact inflation and higher interest rates may have on us by increasing costs beyond what we can recover through price increases; the extent to which the ongoing COVID-19 pandemic or other public health concerns could materially and adversely affect our business operations, financial performance, results of operations, financial position, stock price and personnel; achievement of strategic objectives, any statements regarding our plans, strategies and objectives; progress and remaining payments under the 2021 Restructuring Plan; the impact of new customer network footprint on our gross margin; the effects of seasonal patterns in our business; factors that may affect our operating results; anticipated customer acceptance of our solutions; statements concerning new products or services, including new product features; our beliefs about who we may compete with and how we are differentiated from those competitors; statements regarding our relationships with contract manufacturers and other third-party partners; statements regarding our production capacity and facilities requirements; statements related to capital expenditures; statements related to working capital and liquidity; the sufficiency of our cash to operate our business and our ability to raise capital; expectations regarding research and development investments; our ability to realize deferred tax assets; statements related to future economic conditions, performance, market growth, competitor consolidation or our sales cycle; our ability to identify, attract, upskill and retain highly skilled personnel; our ability to protect our technology and intellectual property, the frequency of claims related to our intellectual property and the value of our intellectual property; statements related to our convertible senior notes and our Credit Facility; our ability to prevent and respond to data breaches and cyber-attacks; statements related to the impact of tax regulations; statements related to the effects of trade sanctions and similar regulations; statements related to the proliferation and impact of environmental, social and governance regulation; statements related to the effects of litigation on our financial position, results of operations or cash flows; the impacts of any restructuring plans or other strategic efforts on our business; statements related to factors beyond our control, such as natural disasters, acts of war or terrorism, epidemics and pandemics; statements related to new accounting standards; statements as to industry trends and other matters that do not relate strictly to historical facts; and statements of assumptions underlying any of the foregoing. These statements are often identified using words such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” "should," "will," or "would," and similar expressions or variations. These statements are based on the beliefs and assumptions of our management based on information currently available to management. Such forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified below, and those discussed in the section titled “Risk Factors” included in Part II, Item 1A. of this Quarterly Report on Form 10-Q and in our other filings with the Securities and Exchange Commission (“SEC"), including our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 as filed on February 27, 2022. You should review these risk factors for a more complete understanding of the risks associated with an investment in our securities. Such forward-looking statements speak only as of the date of this Quarterly Report on Form 10-Q. We disclaim any obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements. The following discussion and analysis should be read in conjunction with our condensed consolidated financial statements and notes thereto included elsewhere in this Quarterly Report on Form 10-Q.

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Overview

We are a semiconductor manufacturer and global supplier of networking solutions comprised of networking equipment, optical semiconductors, software and services. Our portfolio of solutions includes optical transport platforms, converged packet-optical transport platforms, compact modular platforms, optical line systems, coherent optical engines and subsystems, a suite of networking and automation software offerings, and support and professional services. Leveraging our U.S.-based compound semiconductor fab and in-house packaging capabilities, we design, develop, and manufacture industry-leading indium phosphide-based photonic integrated circuits ("PICs") for use in our vertically integrated, high-capacity optical communications products.

Our customers include operators of fixed and mobile networks, including telecommunications service providers, internet content providers ("ICPs"), cable providers, wholesale carriers, research and educational institutions, large enterprises, utilities and government entities. Our networking solutions enable our customers to deliver high-bandwidth business and consumer communications services. Our comprehensive portfolio of networking solutions also enables our customers to scale their transport networks as end-user services and applications continue to drive growth in demand for network bandwidth. These end-user services and applications include, but are not limited to, high-speed internet access, business ethernet services, 4G/5G mobile broadband, cloud-based services, high-definition video streaming services, virtual and augmented reality, Internet of Things ("IoT"), business Ethernet services and data center interconnect ("DCI").

As an optical semiconductor manufacturer, we specialize in the manufacturing of optical compound semiconductors using indium phosphide ("InP"). This technology is used in telecommunications networks to transmit massive amounts of data and power, critical communications services like 5G, enhanced broadband, and high-capacity data center connectivity. We have made significant investments in our unique research, development, fabrication, and packaging facilities, including our optical compound semiconductor fab in Silicon Valley. We optimize the manufacturing process by using InP to build our PICs, which enables the integration of hundreds of optical functions onto a single, monolithic optical semiconductor chip. The unique capabilities of our optical semiconductor fab, which has provided our customers with a critical and secure source of U.S.-produced optical semiconductors and strengthened the supply chain, have enabled us to consistently pioneer critical technology advancements. For example, our latest generation technology has made it possible to transmit information at a rate of 800 gigabits per second ("Gb/s") using a single laser.

We support U.S. government efforts to advance and increase the domestic manufacturing base for semiconductors as a matter of economic and national security. Compound semiconductors – including those based in InP – are an important part of the domestic semiconductor industry and will enable the next-generation of leading-edge technologies. Domestic manufacturing is critical in order to reduce our reliance on foreign sources of compound semiconductor materials and components, which is essential to economic growth and to the security of our domestic communications infrastructure.

The large-scale integration of our PICs and advanced digital signal processors ("DSPs") enables us to develop and manufacture high-performance optical engines that are used in our coherent optical networking system and subsystem solutions. These solutions include features that customers care about the most, including reduced cost per bit, lower footprint and power consumption, and improved performance, reliability and security. Coherent optical solutions are becoming increasingly important across the network as our customers transition to 800 Gb/s per wavelength transmission speeds and beyond in the core, 400 Gb/s in the metro, and 100 Gb/s in the access market segment. We believe our vertical integration strategy provides a competitive advantage by enabling leading optical performance at higher optical speeds with increased spectral efficiency, greater control over our supply chain, and a lower cost structure.

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We have grown our solutions portfolio through internal development as well as acquisitions, including the acquisition of Coriant, a privately held global supplier of open network solutions for the largest global network operators. These developments positioned us to be one of the leading providers of vertically integrated optical networking solutions in the world with the ability to serve a global customer base with accelerated delivery of the innovative solutions our customers demand. In 2021, we announced an expansion of our portfolio with the introduction of a suite of coherent optical pluggables designed to seamlessly address the rapidly growing market for point-to-point solutions as well as create a new category of point-to-multipoint solutions that can enable a dramatically more cost-efficient network architecture. Based on our vertically integrated optical semiconductor technology and supporting a range of high-speed transport rates that include 800 Gb/s, 400 Gb/s and 100 Gb/s, this suite of coherent optical pluggables builds on our history of delivering innovative, highly differentiated, and vertically integrated coherent optical engines.

Our products are designed to be managed by a suite of software solutions that enable simplified network management and automated operations. We also provide software-enabled programmability that offers differentiated capabilities such as Instant Bandwidth. Combined with our differentiated hardware solutions, Instant Bandwidth enables our customers to purchase and activate bandwidth as needed through our unique software licensing feature set. This, in turn, allows our customers to accomplish two key objectives: (1) limit their initial network startup costs and investments; and (2) instantly activate new bandwidth as their customers’ and their own network needs evolve.

We sell our products to end-user customers and third-party network equipment manufacturers via a direct sales force and through indirect channel partners.

We believe our systems and subsystems portfolios benefit our customers by providing a unique combination of highly scalable capacity and features that address access to core transport network applications and ultimately simplify and automate network operations.

Impact of COVID-19 Pandemic

We continue to monitor the COVID-19 pandemic and actively assess potential implications to our business, supply chain, customer fulfillment sites, support operations and customer demand. We are also continuing to take appropriate measures to protect the health and safety of our employees and to create and maintain a safe working environment. While the effects of the COVID-19 pandemic have been decreasing, if the COVID-19 pandemic or its adverse effects become more severe or prevalent in the future or are prolonged in the locations where we, our customers, suppliers or contract manufacturers conduct business, or we experience more pronounced disruptions in our operations, or in economic activity and demand generally, our business and results of operations in future periods could be materially adversely affected.

Critical Accounting Policies and Estimates

Management’s Discussion and Analysis of Financial Condition and Results of Operations is based upon our condensed consolidated financial statements, which we have prepared in accordance with the U.S. generally accepted accounting principles (“U.S. GAAP”). The preparation of these financial statements requires management to make estimates, assumptions and judgments that can affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Management bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources.

An accounting policy is deemed to be critical if it requires a significant accounting estimate to be made based on assumptions about matters that are highly uncertain at the time the estimate is made, if different estimates reasonably could have been used, or if changes in the estimate that are reasonably likely to occur could materially impact the financial statements. Management believes that there have been no significant changes during the three-months ended April 1, 2023 to the items that we disclosed as our critical accounting policies and estimates in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Inflation, disruption in the global economy and financial markets, and the ongoing effects of the COVID-19 pandemic, continue to create uncertainty. However, we are not aware of any specific event or circumstance that would require updates to our estimates or judgments or require us to revise the carrying value of our assets or liabilities as of the date we filed this Quarterly Report on Form 10-Q. These estimates may change as new events

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occur and additional information is obtained. Actual results could differ from these estimates under different assumptions or conditions.

Results of Operations

The following sets forth, for the periods presented, certain unaudited condensed consolidated statements of operations information (in thousands, except percentage data):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Amount		% of total revenue		Amount		% of total revenue		Change		% Change
Revenue:
Product	$	314,820	80	%	$	267,453	79	%	$	47,367	18	%
Services	77,255		20	%	71,421		21	%	5,834		8	%
Total revenue	$	392,075	100	%	$	338,874	100	%	$	53,201	16	%
Cost of revenue:
Product	$	198,674	51	%	$	182,887	55	%	$	15,787	9	%
Services	42,947		11	%	37,959		10	%	4,988		13	%
Amortization of intangible assets	3,556		1	%	6,231		2	%	(2,675)		(43)	%
Restructuring and other related costs	—		—	%	150		—	%	(150)		(100)	%
Total cost of revenue	$	245,177	63	%	$	227,227	67	%	$	17,950	8	%
Gross profit	$	146,898	37	%	$	111,647	33	%	$	35,251	32	%

Revenue

Total product revenue increased by $47.4 million, or 18%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022. This year-over-year increase in revenue was driven by the ramp of new products, particularly ICE6, led by growth in the ICP and other service provider verticals, partially offset by decreased revenue from our Tier 1 vertical and continued supply constraints.

Total services revenue increased by $5.8 million, or 8%, for the three-months ended April 1, 2023 compared to the corresponding period in 2022. The increase in revenue is due to an increase in both maintenance and professional services revenue.

The following table summarizes our revenue by geography and sales channel for the periods presented (in thousands, except percentage data):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Amount		% of total revenue		Amount		% of total revenue		Change		% Change
Total revenue by geography:
Domestic	$	237,035	60	%	$	170,185	50	%	$	66,850	39	%
International	155,040		40	%	168,689		50	%	(13,649)		(8)	%
	$	392,075	100	%	$	338,874	100	%	$	53,201	16	%
Total revenue by sales channel:
Direct	$	262,862	67	%	$	260,892	77	%	$	1,970	1	%
Indirect	129,213		33	%	77,982		23	%	51,231		66	%
	$	392,075	100	%	$	338,874	100	%	$	53,201	16	%

Domestic revenue increased by $66.9 million, or 39%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022, driven primarily by increased revenue from our ICP and other service provider verticals.

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International revenue decreased by $13.6 million, or 8%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022, driven primarily by decreased revenue from customers in our EMEA region.

Direct revenue increased by $2.0 million, or 1%, and indirect revenue increased by $51.2 million, or 66%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022. The increase in indirect revenue was driven by ICP customers who purchased through our indirect sales channel and increases from our other service provider vertical.

Cost of Revenue and Gross Margin

Gross profit was $146.9 million during the three-months ended April 1, 2023, with gross margin increasing to 37% compared to 33% in the corresponding period in 2022. In the three-months ended April 1, 2023, the increase was driven by the ramp of new vertically integrated products, particularly ICE6, and ongoing cost improvement and quality initiatives, partially offset by higher costs related to component price increases.

Amortization of Intangible Assets

Amortization of intangible assets decreased by $2.7 million, or 43%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022. The decrease was due to certain developed technology assets that were fully amortized in 2022.

Restructuring and Other Related Costs

Restructuring and other related costs primarily consisting of severance and other related costs primarily reflect the substantial completion of our 2021 Restructuring Plan. See Note 7, “Restructuring and Other Related Costs” to the notes to condensed consolidated financial statements for more information.

Operating Expenses

The following tables summarize our operating expenses for the periods presented (in thousands, except percentage data):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Amount		% of total revenue		Amount		% of total revenue		Change		% Change
Operating expenses:
Research and development	$	81,042	21	%	$	73,411	22	%	$	7,631	10	%
Sales and marketing	41,707		11	%	35,824		11	%	5,883		16	%
General and administrative	29,235		7	%	27,890		8	%	1,345		5	%
Amortization of intangible assets	3,589		1	%	3,746		1	%	(157)		(4)	%
Restructuring and other related costs	790		—	%	7,270		2	%	(6,480)		(89)	%
Total operating expenses	$	156,363	40	%	$	148,141	44	%	$	8,222	6	%

Research and Development Expenses

Research and development expenses increased by $7.6 million, or 10% during the three-months ended April 1, 2023 compared to the corresponding period in 2022. The increase during the three-months ended April 1, 2023 was primarily attributable to higher employee-related expenses, material costs, depreciation and equipment costs related to bringing our new technologies to market and investments in future technologies.

Sales and Marketing Expenses

Sales and marketing expenses increased by $5.9 million, or 16%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022. These increases were primarily attributable to higher employee-related expenses, increased travel costs as COVID-related restrictions eased, spending on trial equipment and higher marketing costs related to the resumption of in-person trade shows partially offset by lower fees for outside professional services.

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General and Administrative Expenses

General and administrative expenses increased by $1.3 million, or 5%, during the three-months ended April 1, 2023 compared to the corresponding period in 2021, driven primarily by higher employee-related expenses and outside professional services, partially offset by decreases in litigation settlement costs, tax expenses and bad debt recoveries.

Amortization of Intangible Assets

Amortization of intangible assets decreased by $0.2 million, or 4%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022.

Restructuring and Other Related Costs

Restructuring and other related costs decreased by $6.5 million, or 89%, during the three-months ended April 1, 2023, compared to the corresponding period in 2022. The decrease was primarily due to lower lease related impairment charges and the substantial completion of the 2021 restructuring plan. See Note 7, “Restructuring and Other Related Costs” to the notes to condensed consolidated financial statements for more information.

Other Income (Expense), Net

	Three Months Ended
	April 1, 2023		March 26, 2022		Change		% Change
	(In thousands)
Interest income	$	471	$	53	$	418	789	%
Interest expense	(6,800)		(4,992)		(1,808)		36	%
Other gain	10,956		6,020		4,936		(82)	%
Total other income, net	$	4,627	$	1,081	$	3,546	(328)	%

Interest income increased $0.4 million or 789% compared to the corresponding period in 2022, primarily due to the investments in money market funds.

Interest expense increased $1.8 million, or 36% compared to the corresponding period in 2022, primarily due to the issuance of the 2028 Notes, offset by the partial repurchase of our 2024 Notes in August 2022. See Note 10, “Debt” to the notes to condensed consolidated financial statements for more information.

Other gain, increased by $4.9 million, or 82%, during the three-months ended April 1, 2023 compared to the corresponding period in 2022, primarily due to unrealized foreign exchange gain driven by foreign currency exchange rate changes.

Income Tax Provision

Income taxes for the three-months ended April 1, 2023 represented a tax expense of $3.6 million on pre-tax losses of $4.8 million. This compared to a tax expense of $6.4 million on pre-tax losses of $35.4 million for the three-months ended March 26, 2022. Provision for income taxes decreased by approximately $2.8 million during the three-months ended April 1, 2023, compared to the corresponding period in 2022 as a result of a decrease in income taxes and withholding taxes in foreign jurisdictions, primarily driven by elimination of the withholding tax in Germany due to an internal restructuring of our supply chain and customer-facing entities.

Our effective tax rate was lower for the three-months ended April 1, 2023, due to an internal restructuring of our supply chain and customer-facing entities. Among other things, the new structure aligned and consolidated the exploitation of our intellectual property and the allocation of the associated commercial risk and reward with the customer-facing entities that manage our supply chain.

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Liquidity and Capital Resources

	Three Months Ended
	April 1, 2023		March 26, 2022
	(In thousands)
Net cash flow (used in) provided by:
Operating activities	$	(1,769)	$	15,788
Investing activities	$	(16,809)	$	(16,059)
Financing activities	$	4,807	$	6,412

	April 1, 2023		December 31, 2022
	(In thousands)
Cash and cash equivalents	$	163,765	$	178,657
Restricted cash	5,969		10,546
	$	169,734	$	189,203

Our restricted cash balance amounts are primarily pledged as collateral for certain standby letters of credit related to customer performance guarantees, value added tax licenses and property leases.

Operating Activities

Net cash used in operating activities during the three-months ended April 1, 2023 was $1.8 million compared to $15.8 million net cash provided by operating activities for the corresponding period in 2022.

Net loss during the three-months ended April 1, 2023 was $8.4 million, which included non-cash charges of $37.3 million such as depreciation, amortization of intangibles, restructuring charges and other related costs, amortization of debt issuance costs, operating lease expense, and stock-based compensation, compared to a net loss during the three-months ended March 26, 2022 of $41.9 million, which included non-cash charges of $44.5 million.

Net cash used in working capital was $30.7 million during the three-months ended April 1, 2023. Accounts receivable decreased by $86.2 million due to timing of collections and seasonally lower customer billings due to lower revenue. Inventory levels increased by $38.6 million primarily due to our efforts to purchase more inventory to manage lead time challenges resulting from the industry-wide supply chain environment. Accounts payable decreased by $28.0 million primarily due to timing of payments to suppliers. Accrued liabilities and other expenses decreased by $44.7 million primarily due to payout of management bonuses, timing of other compensation related expenses and tax payments. Deferred revenue decreased by $6.7 million primarily due to amortization of maintenance renewals during the period.

Net cash provided by working capital was $13.2 million during the three-months ended March 26, 2022. Accounts receivable decreased by $81.8 million due to lower revenue and due to cash collections. Prepaid and other assets increased by $23.5 million primarily due to timing of tax payments and an increase in customer contract assets. Accounts payable decreased by $19.8 million primarily due to timing of payment to suppliers. Accrued liabilities and other expenses decreased by $14.4 million primarily due to lower accrued compensation and related benefits and purchases of shares of our common stock under our ESPP in February 2022. Deferred revenue decreased by $9.0 million due to amortization of annual maintenance renewals during the period.

Investing Activities

Net cash used in investing activities during the three-months ended April 1, 2023 was $16.8 million, entirely for the purchase of property and equipment.

Net cash used in investing activities during the three-months ended March 26, 2022 was $16.1 million, entirely for the purchase of property and equipment.

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Financing Activities

Net cash provided by financing activities during the three-months ended April 1, 2023 was $4.8 million compared to net cash provided by financing activities of $6.4 million in the corresponding period of 2022. Financing activities during the three-months ended April 1, 2023 primarily included net proceeds of $8.7 million from the issuance of shares of our common stock under the ESPP. These proceeds were offset by $2.3 million term license purchases, and tax withholdings in the amount of $1.1 million paid on behalf of certain employees for net share settlements of RSUs.

Net cash provided by financing activities during the three-months ended March 26, 2022 was $6.4 million. Financing activities during the three-months ended March 26, 2022 primarily included net proceeds of $8.9 million from the issuance of shares of our common stock under the ESPP. These proceeds were offset by payment of $1.4 million term license purchase, $0.4 million payments on finance lease obligations, and tax withholdings in the amount of $0.5 million paid on behalf of certain employees for net share settlements of RSUs.

Liquidity

We believe that our current cash, along with the Credit Facility (as defined below) will be sufficient to meet our anticipated cash needs for working capital and capital expenditures, and the interest payments on our convertible senior notes and the Credit Facility for at least 12 months. If the impact to our business and financial position of the supply chain challenges and disruptions in the global economy, banking sector and financial markets is more extensive or prolonged than expected and our existing sources of cash are insufficient to satisfy our liquidity requirements, we may require additional capital from equity or debt financings to fund our operations, to respond to competitive pressures or strategic opportunities, or otherwise. In addition, we are continuously evaluating alternatives and potential transactions for efficiently funding our capital expenditures, ongoing operations and servicing our existing debt. We may, subject to market conditions and other considerations, from time to time engage in a variety of financing transactions for such purposes, including the issuance or incurrence of additional debt and the refinancing of existing debt. We may not be able to secure timely additional financing, or refinance existing debt, on favorable terms or at all. The terms of any additional financings or refinance may place limits on our financial and operating flexibility. If we raise additional funds through further issuances of equity or equity-linked securities, our existing stockholders could suffer dilution in their percentage ownership of us, and any new securities we issue could have rights, preferences and privileges senior to those of holders of our common stock.

On August 8, 2022, we issued the 2028 Notes, which will mature on August 1, 2028, unless earlier repurchased, redeemed or converted. Interest is payable semi-annually in arrears on February 1 and August 1 of each year, which commenced on February 1, 2023. In the event that all of the 2028 Notes are converted, we would be required to repay the principal amount in cash and the conversion premium in any combination of cash and shares of its common stock at our election.

On March 9, 2020, we issued the 2027 Notes, which will mature on March 1, 2027, unless earlier repurchased, redeemed or converted. Interest is payable semi-annually in arrears on March 1 and September 1 of each year, which commenced on September 1, 2020. For the conversion obligation, we intend to pay or deliver, as the case may be, cash, shares of our common stock, or a combination of cash and shares of our common stock, at our election.

On September 11, 2018, we issued the 2024 Notes, which will mature on September 1, 2024, unless earlier repurchased, redeemed or converted. Interest is payable semi-annually in arrears on March 1 and September 1 of each year, which commenced on March 1, 2019. For the conversion obligation, we intend to pay or deliver, as the case may be, cash, shares of our common stock, or a combination of cash and shares of our common stock, at our election.

For more information regarding the convertible senior notes, see Note 10, “Debt” to the notes to condensed consolidated financial statements. Refer to Note 11, "Commitment and Contingencies" to the notes to the condensed consolidated financial statements for future payment obligations.

On June 24, 2022, we entered into a Loan, Guaranty and Security Agreement (the "Loan Agreement") with the lenders party thereto, and Bank of America, N.A., as agent. The Loan Agreement provides for a senior secured asset-based revolving credit facility of up to $200 million (the "Credit Facility"), which we may draw upon from time to time. We may increase the total commitments under the revolving credit facility by up to an additional $100 million, subject to certain conditions. In addition, the Loan Agreement provides for a $50 million letter of credit subfacility and a $20 million swingline loan facility.

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As of April 1, 2023, we had no drawings on the Credit Facility and we had availability of $133.4 million under the Credit Facility. For more information regarding the Credit Facility, see Note 10, “Debt” to the notes to condensed consolidated financial statements.

As of April 1, 2023, we had $169.7 million of cash, cash equivalents and restricted cash including $65.1 million of cash held by our foreign subsidiaries. Our policy with respect to undistributed foreign subsidiaries' earnings is to consider those earnings to be indefinitely reinvested. As a result of the enactment in the United States of the Tax Cuts and Jobs Act of 2017, if and when funds are actually distributed in the form of dividends or otherwise, we expect minimal tax consequences, including foreign withholding taxes, which would be applicable in some jurisdictions.

We had standby letters of credit and bank guarantees as of the quarters ended April 1, 2023 and March 26, 2022. See Note 15, “Guarantees” to the notes to condensed consolidated financial statements for further information.

Off-Balance Sheet Arrangements

As of April 1, 2023, we did not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Item 3.Quantitative and Qualitative Disclosures about Market Risk

Market risk represents the risk of loss that may impact our financial position due to adverse changes in financial market prices and rates. Our market risk exposure is primarily a result of fluctuations in foreign currency exchange rates and interest rates. We assess these risks on a regular basis and have established policies that are designed to protect against, but that cannot entirely eliminate the adverse effects of these and other potential exposures.

Foreign Currency Exchange Rate Risk

There have been no material changes to the foreign currency exchange rate risk previously disclosed in Part II, Item 7A, "Quantitative and Qualitative Disclosures About Market Risk," of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Interest Rate Risk

There have been no material changes to the interest rate risk previously disclosed in Part II, Item 7A, "Quantitative and Qualitative Disclosures About Market Risk," of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Item 4.Controls and Procedures

Evaluation of Disclosure Controls and Procedures

An evaluation was performed by our management, with the participation of our CEO and our CFO, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d -15(e) under the Exchange Act). Disclosure controls and procedures are designed to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to management, including our CEO and CFO, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable, not absolute assurance that the control system’s objectives will be met. Additionally, management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures. 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 upon 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

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to risks. Over time, controls may become inadequate because of changes in business conditions or deterioration in the degree of compliance with policies or procedures. Based on this evaluation, as of the end of the period covered by this Quarterly Report on Form 10-Q, our CEO and CFO concluded that, as of April 1, 2023, our disclosure controls and procedures are effective at a reasonable assurance level.

Changes in Internal Control over Financial Reporting

During the three-months ended April 1, 2023 there were no changes in our internal control over financial reporting which were identified in connection with management’s evaluation required by paragraph (d) of Rules 13a-15 and 15d-15 under the Exchange Act, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1.Legal Proceedings

The information set forth above in Part 1, Item 1, Note 11 under the heading "Commitments and Contingencies – Legal Matters" is incorporated herein by reference.

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ITEM 1A.    RISK FACTORS

Investing in our securities involves a high degree of risk. A description of the risks and uncertainties associated with our business is set forth below. These risks, together with many other factors described in this report and in our other public filings, and additional risks and uncertainties not currently known to us or that we currently deem to be immaterial, could adversely affect our operations, performance and financial condition. Our actual results could differ materially from our forward-looking statements.

Risk Factors Summary

The following is a summary of the principal risks that could adversely affect our business, operations and financial results.

Business and Operational Risk Factors

•Our quarterly results may vary significantly from period to period.

•Our ability to increase our revenue will depend upon continued demand growth for additional network capacity and on the level and timing of customer capital spending.

•Any delays in the development, introduction or acceptance of our new products or in releasing enhancements to our existing products may harm our business.

•Aggressive business tactics by our competitors and new entrants may harm our business.

•Supply chain and logistics issues, including delays, shortages, longer than normal lead times, unfavorable contractual terms, components that have been discontinued and increased costs, and our dependency on sole source, limited source or high-cost suppliers, could harm our business and operating results.

•The markets in which we compete are highly competitive and we may not be able to compete effectively.

•Product performance problems or deployment delays could harm our business, results of operations and reputation.

•We are dependent on a small number of key customers for a significant portion of our revenue.

•The manufacturing process for our optical engine and the assembly of our products are very complex.

•If we lose key personnel or fail to attract qualified personnel, our business may be harmed.

•The effects of the COVID-19 pandemic or other public health concerns could have a material adverse effect on our business, manufacturing operations and results of operations.

•If our contract manufacturers do not perform as we expect, our business may be harmed.

•Increased consolidation among our customers and suppliers in the communications networking industry has had, and could continue to have, an adverse effect on our business and results of operations.

•We rely on various third-party service partners to help complement our global operations.

•We must respond to rapid technological change for our products to be successful.

•If we fail to accurately forecast our manufacturing requirements or customer demand, we could incur additional costs.

•Actions that we are taking or may in the future take to restructure our business may not be as effective as anticipated and may have negative consequences.

•Our large customers have substantial negotiating leverage, which may harm our results of operations.

•Our sales cycle can be long and unpredictable, which could result in unexpected revenue shortfalls.

•Any acquisitions or strategic transactions that we undertake could disrupt our business and harm our financial condition and operations.

Financial and Macroeconomic Risk Factors

•We may be unable to generate the cash flow necessary to make anticipated capital expenditures, service our debt, or grow our business.

•Inflation may adversely affect us by increasing costs beyond what we can recover through price increases.

•Unfavorable macroeconomic and market conditions may adversely affect our industry, business and financial results.

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•If we need additional capital in the future, it may not be available to us on favorable terms, or at all.

•Our Loan Agreement and any other credit or similar agreements into which we may enter in the future may restrict our operations, particularly our ability to respond to changes or to take certain actions regarding our business.

•Our debt obligations may adversely affect our ability to raise additional capital and will be a burden on our future cash resources.

•Our international sales and operations subject us to additional risks.

•We may be adversely affected by fluctuations in currency exchange rates.

•Our effective tax rate may increase or fluctuate, which could increase our income tax expense and reduce our net income.

•We may issue additional shares of our common stock in connection with conversions of the 2024 Notes, the 2027 Notes and the 2028 Notes.

•The fundamental change provisions of the 2024 Notes, the 2027 Notes and the 2028 Notes may delay or prevent an otherwise beneficial takeover attempt of us.

•The Capped Calls (as defined below) may affect the value of the 2024 Notes and our common stock.

•We are subject to counterparty risk with respect to the Capped Calls (as defined below).

Legal and Regulatory Risk Factors

•If we fail to protect our intellectual property rights, our competitive position could be harmed, or we could incur significant expense to enforce our rights.

•Claims by others that we infringe their intellectual property rights could harm our business.

•Security incidents, such as data breaches and cyber-attacks, could compromise our intellectual property and proprietary or confidential information and cause significant damage to our business and reputation.

•If we fail to maintain effective internal controls over financial reporting in the future, the accuracy and timing of our financial reporting may be adversely affected.

•We are subject to various governmental export control, trade sanctions and import laws and regulations that could impair our ability to compete in international markets or subject us to liability.

•We are subject to environmental regulations that could adversely affect our business.

•Regulations relating to environmental, social and governance matters, as well as customer and investor demands, may add operational complexity for us and may adversely affect our relationships with our customers, suppliers and investors.

•We are subject to global data privacy and data protection laws and regulations that could adversely affect our business or subject us to liability.

•A portion of our revenue is generated by sales to government entities, which are subject to a number of uncertainties, challenges and risks.

•Our business could be adversely affected if we cannot obtain and maintain required security clearances, or we do not comply with obligations regarding the safeguarding of classified information.

•Failure to comply with anti-bribery and similar laws could subject us to adverse consequences.

General Risk Factors

•The trading price of our common stock has been volatile and is likely to be volatile in the future.

•Future sales of our common stock could cause our stock price to fall.

•Anti-takeover provisions in our charter documents and Delaware law could discourage, delay or prevent a change in control of our company and may affect the trading price of our common stock.

•Exclusive forum provisions in our bylaws will restrict our stockholders’ ability to choose the judicial forum for disputes with us or our directors, officers or employees.

•Events that are outside of our control, such as natural disasters, terrorist attacks, wars, such as Russia's war with Ukraine, or other catastrophic events, could harm our operations.

For a more complete discussion of the material risks facing our business, see below.

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Business and Operational Risk Factors

Our quarterly results may vary significantly from period to period, which could make our future results difficult to predict and could cause our operating results to fall below investor, analyst or our expectations.

Our quarterly results and, in particular, our revenue, gross margins, operating expenses, operating margins and net income (loss), have historically varied significantly from period to period and may continue to do so in the future. As a result, comparing our operating results on a period-to-period basis may not be meaningful. Our budgeted expense levels are based, in large part, on our expectations of future revenue and the development efforts associated with that future revenue. Consequently, if our revenue does not meet projected levels in the short term, our inventory levels, cost of goods sold and operating expenses would be high relative to revenue, resulting in potential operating losses. If our revenue or operating results do not meet the expectations of investors or securities analysts or fall below any guidance we provide to the market, the price of our common stock may decline substantially.

Factors that may contribute to fluctuations in our quarterly results, many of which are outside our control and may be difficult to predict, include:

•fluctuations in demand, sales cycles and prices for products and services, including discounts given in response to competitive pricing pressures or to secure long-term customer relationships, as well as the timing of purchases by our key customers;

•the price, quality, lead times, timing of delivery and availability of key components from suppliers, including any price or shipping cost increases or delays in the supply of components that may result from supply disruptions as well as impacts due to consolidations amongst our suppliers;

•changes in customers’ budgets for optical transport network purchases and changes or variability in their purchasing cycles;

•fluctuations in our customer, product or geographic mix, including the impact of new customer deployments, which typically carry lower gross margins, customer consolidation, which may affect our ability to grow revenue, and products powered by our next-generation technologies, which initially tend to be lower margin due to higher per unit production costs and may have greater variability in production yields;

•the timing, market acceptance and rate of adoption of our new product releases and our competitors' new product releases;

•our ability to manage manufacturing costs, maintain or improve quality, and increase volumes and yields on products manufactured in our internal manufacturing facilities;

•our ability to control costs, including our operating expenses and the costs and availability of components and materials we purchase for our products;

•our ability to successfully restructure or transform our operations within our anticipated time frame and realize our anticipated savings;

•order cancellations or reductions or delays in delivery schedules by our customers;

•any significant changes in the competitive dynamics of the markets we serve, including any new entrants, new technologies, or customer or competitor consolidation, as well as aggressive pricing tactics by our competitors;

•our ability to manage inventory while timely meeting customer demand and avoiding charges for excess or obsolete inventory;

•readiness of customers for installation of our products, which has been impacted by the effects of global supply chain disruptions;

•any delay in collecting or failure to collect accounts receivable;

•the timing of revenue recognition and revenue deferrals;

•any future changes in U.S. GAAP or new interpretations of existing accounting rules;

•the impact of a significant natural disaster or public health emergency, as well as interruptions or shortages in the supply of utilities such as water and electricity, in a key location such as our Northern California facilities, which are located near major earthquake fault lines, in areas of high fire risk and in a designated flood zone; and

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•general economic, market and political conditions in domestic and international markets, including those related to any policy changes by the federal government or by the presidential administration in the United States, and other factors beyond our control, including the ongoing effects of continuing inflation, high interest rates and the COVID-19 pandemic and related response measures.

Our ability to increase our revenue will depend upon continued growth of demand by consumers and businesses for additional network capacity, on the level and timing of capital spending by our customers, and on the continued demand for our services support.

Our future success depends on factors that increase the amount of data transmitted over communications networks and the growth of optical transport networks to meet the increased demand for optical capacity. These factors include the growth of mobile, video and cloud-based services, increased broadband connectivity and the continuing adoption of high-capacity, revenue-generating services. If demand for such bandwidth does not continue, or slows down, the market for optical transport networking equipment may not continue to grow and our product sales would be negatively impacted.

In addition, demand for our products depends on the level and timing of capital spending in optical networks by service providers as they construct, expand and upgrade the capacity of their optical networks. Capital spending is cyclical in our industry and spending by customers can change on short notice. Any future decisions by our customers to reduce capital spending, whether caused by lower customer demand, weakening economic conditions, rising borrowing costs, inflation, customer-specific supply chain issues, changes in government regulations relating to telecommunications and data networks, or other reasons, could have a material adverse effect on our business, financial condition and results of operations.

Revenue we receive for our services offerings is highly dependent on product sales and the implementation processes of our customers. If our customers have internal services teams or if our products such as our pluggables do not otherwise require our services support, our revenue related to services and our related gross margins may be impacted and our results of operations may be harmed.

Any delays in the development, introduction or acceptance of our new products or in releasing enhancements to our existing products may harm our business.

Our products are based on complex technologies, including, in many cases, the development of next-generation PICs, DSPs and specialized application-specific integrated circuits ("ASICs"), each of which are key components of our optical engines. In addition, we may also depend on technologies from outside suppliers, all of which may cause us to experience unanticipated delays in developing, improving, manufacturing or deploying our products. The development process for our optical engines is lengthy, and any modifications entail significant development cost and risks.

At any given time, various new product introductions and enhancements to our existing products are in the development phase and are not yet ready for commercial manufacturing or deployment. We rely on third parties, some of which are relatively early-stage companies, to develop, manufacture and deliver components for our next-generation products, which can often require custom development. The development process from laboratory prototype to customer trials, and subsequently to general availability, involves a significant number of simultaneous efforts. These efforts often must be completed in a timely and coordinated manner so that they may be incorporated into the product development cycle for our systems, and include:

•completion of product development, including the development and completion of our next-generation optical engines, and the completion of associated module development;

•the qualification and multiple sourcing of critical components;

•validation of manufacturing methods and processes;

•extensive quality assurance and reliability testing and staffing of testing infrastructure;

•validation of software; and

•establishment of systems integration and systems test validation requirements.

Each of these steps, in turn, presents risks of failure, rework or delay, any one of which could decrease the speed and scope of product introduction and marketplace acceptance of our products. New generations of our optical engines as well as intensive software testing are important to the timely introduction of new products and enhancements to our existing products, which are subject to these development risks. In addition, unexpected intellectual property disputes, inability to obtain licenses to utilize third party development tools or other intellectual

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property on commercially acceptable terms, failure of critical design elements, limited or constrained engineering resources, changes in product designs and a host of other development execution risks may delay, or even prevent, the introduction of new products or enhancements to our existing products. If we have longer development lead times than our competitors for comparable products, or if we do not develop and successfully introduce or enhance products ahead of our competitors or in a timely manner, including the successful development of our next generation optical engine, our competitive position will suffer.

As we transition customers to new products, we face significant risk that our new products may not be accepted by our current or new customers. To the extent that we fail to introduce new and innovative products that are adopted by customers, we could fail to obtain an adequate return on these investments and could lose market share to our competitors, which could be difficult or impossible to regain. Similarly, we may face decreased revenue, gross margins and profitability due to a rapid decline in sales of current products as customers hold spending to focus purchases on new product platforms. In addition, the sale of new products may result in the cannibalization of sales for existing products, which may harm our results of operations. We could also incur significant costs in completing the transition, including costs of inventory write-downs of the current product as customers transition to new product platforms. In addition, products or technologies developed by others may render our products noncompetitive or obsolete and result in significant reduction in orders from our customers and the loss of existing and prospective customers. Any delays in the introduction of new components that we are developing for use in our other products as part of our vertical integration strategy may also prevent us from realizing the anticipated cost savings of such development. This may negatively impact our gross margins and harm our business and operating results.

Aggressive business tactics by our competitors and new entrants may harm our business.

The markets that we compete in are extremely competitive, which often results in aggressive business tactics by our competitors and new entrants, including:

•aggressively pricing their optical transport products and other portfolio products, including offering significant one-time discounts and guaranteed future price decreases;

•offering optical products at a substantial discount or for free when bundled together with broader technology purchases, such as router or wireless equipment purchases;

•marketing product availability on aggressive timelines to influence customer purchasing decisions;

•providing financing, marketing and advertising assistance to customers; and

•influencing customer requirements to emphasize different product capabilities, which better suit their products.

The level of competition and pricing pressure tend to increase when competing for large or high-profile opportunities or during periods of economic weakness when there are fewer network build-out projects. If we fail to compete successfully against our current and future competitors, or if our current or future competitors continue or expand their aggressive business tactics, including those described above, demand for our products could decline, we could experience delays or cancellations of customer orders or we could be required to reduce our prices to compete in the market.

Supply chain and logistics issues, including delays, shortages, longer than normal lead times, unfavorable contractual terms, components that have been discontinued and increased costs, and our dependency on sole source, limited source or high-cost suppliers, could harm our business and operating results.

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We are reliant on our global supply chain for the production of components for our products. The global supply chain has experienced disruptions that began in 2020 as a result of the COVID-19 pandemic, leading to delays, shortages, longer than normal lead times, unfavorable contractual terms relating to refundability and cancellation, components that have been discontinued and increased costs. These supply disruptions have negatively impacted our revenue and our results of operations. For example, shortages of and longer lead times for certain key components have adversely affected our ability to deliver products to customers in a timely manner. Additionally, price increases within our supply chain have continued to negatively affect our gross margin. The global supply chain for components for our products, especially for semiconductor components, continues to experience shortages and increased costs, despite lead times beginning to lessen in duration. These shortages and increased costs are expected to continue throughout 2023. We cannot predict with certainty the scope, magnitude or duration of the impact that these supply chain disruptions will have on our business and results of operations. Any efforts that we make to mitigate supply chain issues, such as by making additional or long-term purchase commitments with our suppliers or by holding higher levels of inventory, could negatively impact our cash flow and financial results if we do not accurately forecast customer demand or if our customers change their purchasing patterns in response to the evolving supply chain environment. Further, the lead times required for these mitigation efforts may not allow us to take advantage of market price decreases or meet increased customer demand in a timely manner.

We currently purchase several key components for our products from sole or limited sources. In particular, we rely on our own production of certain components of our products, such as PICs, and on third parties, including sole source and limited source suppliers, for certain of the components of our products, including ASICs, field-programmable gate arrays, processors, and other semiconductor and optical components. We have increased our reliance on third parties to develop and manufacture components for certain products, some of which require custom development. We purchase most of these components on a purchase order basis and generally only have long-term contracts with these sole source or limited source suppliers. If any of our sole source or limited source suppliers suffer from capacity constraints, materials shortages, lower than expected yields, deployment delays, geopolitical-related disruptions, work stoppages or any other reduction or disruption in output, they may be unable to meet our delivery schedule, which could result in lost revenue, additional product costs and deployment delays that could harm our business and customer relationships. In addition, these same suppliers may decide to no longer manufacture or support specific components necessary for some of our legacy products, which could lead to our inability to fulfill demand without increased engineering and material costs necessary to replace such components or cause us to transition such products to end-of-life status sooner than planned. Further, our suppliers could enter into exclusive arrangements with our competitors, refuse to sell their products or components to us at commercially reasonable prices or at all, go out of business or discontinue their relationships with us. If any of these developments were to occur, we may be unable to develop alternative sources for these components within a suitable time frame to be able to operate our business, or at all.

The loss of a source of supply, or lack of sufficient availability of key components, could require us to redesign products that use such components, which could result in lost revenue, additional product and engineering costs and deployment delays that could harm our business and customer relationships. Due to cross dependencies, any supply chain disruptions could negatively impact the demand for our products in the short term. In addition, if our contract manufacturers do not receive critical components in a timely manner to build our products, then we would not be able to ship certain products in a timely manner and would, therefore, be unable to meet our prospective customers’ product delivery requirements. In the past, we have experienced delivery delays because of lack of availability of components or reliability issues with components that we were purchasing. In addition, some of our suppliers have gone out of business, merged with another supplier, or limited their supply of components to us, which may cause us to experience longer than normal lead times, supply delays and increased prices. We may in the future experience a shortage of certain components as a result of our own manufacturing issues, manufacturing issues at our suppliers or contract manufacturers, capacity problems experienced by our suppliers or contract manufacturers, strong demand in the industry for such components, or other disruptions in our supply chain. For example, during 2022, several of our materials suppliers with manufacturing facilities near Shanghai, China were affected by COVID-19-related quarantines, which have since been lifted. At certain times, these quarantines led to delayed shipments to certain of our contract manufacturers, which subsequently constrained the ability of these contract manufacturers to supply certain components to us on a timely basis. Disruptions to global macroeconomic conditions may also make it more difficult for us and our suppliers to accurately project overall component demand and manufacturing capacity. These supplier disruptions may continue to occur in the future, which could limit our ability to produce our products and cause us to fail to meet a customer’s delivery requirements. Any failure to meet our customers’ product delivery requirements could harm our reputation and our customer relationships, either of which would harm our business and operating results.

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The markets in which we compete are highly competitive and we may not be able to compete effectively.

The optical networking equipment market is competitive. Our main competitors include DWDM system suppliers, such as ADVA Optical Networking, Ciena Corporation, Cisco Systems, Ribbon Communications Inc., Huawei Technologies Co., Ltd., Nokia and ZTE. In addition, there are several other companies that offer one or more products that partially compete with our offerings. Moreover, other companies have developed, or may in the future develop, products that are or could be competitive with our products. We also could encounter competitor consolidation in the markets in which we compete, which could lead to a changing competitive landscape, capabilities and market share, and could impact our results of operations. For example, in March 2021, Cisco completed its acquisition of optical communications supplier Acacia Communications.

Competition in the markets we serve is based on any one or a combination of the following factors:

•price and other commercial terms;

•functionality and optical performance;

•existing business and customer relationships;

•the ability of products and services to meet customers’ immediate and future network requirements;

•the availability of components required to manufacture key products;

•power consumption;

•heat dissipation;

•form factor or density;

•installation and operational simplicity;

•quality and reliability;

•service and support;

•security and encryption requirements;

•scalability and investment protection; and

•product lead times.

Some of our competitors have substantially greater name recognition and technical, financial, sales and marketing resources. Many of our competitors have more resources and more experience in developing or acquiring new products and technologies, customizing product features specific to certain geographic requirements and in creating market awareness for those products and technologies. In addition, many of our competitors have the financial resources to offer competitive products at aggressive pricing levels or have the ability to provide financing to customers, which could prevent us from competing effectively. Further, many of our competitors have built long-standing relationships with some of our prospective and existing customers and could, therefore, have an inherent advantage in selling products to those customers.

We also compete with low-cost producers that may increase pricing pressure on us and with a number of smaller companies that provide competition for a specific product, customer segment or geographic market. In addition, we may also face increased competition from system and component companies that develop products based on off-the-shelf hardware that offers the latest commercially available technologies. Due to the narrower focus of their efforts, these competitors may achieve commercial availability of their products more quickly than we can and may provide attractive alternatives to our customers.

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Product performance problems, including undetected errors in our hardware or software, or deployment delays could harm our business, results of operations and reputation.

The development and production of products with high technology content is complicated and often involves problems with hardware, software, components and manufacturing methods. Complex hardware and software systems that are built with and include increasingly sophisticated technology, such as our products, can often contain undetected errors or bugs when first introduced or as new versions are released. In addition, errors associated with components we purchase from third parties, including customized components, may be difficult to resolve. We have experienced issues in the past in connection with our products, including failures due to the receipt of components from our suppliers that are either faulty or do not meet our product specifications, and performance issues related to software updates. From time to time, we have had to replace certain components or provide software remedies or other remediation in response to errors or bugs, and we may have to do so again in the future. In addition, performance issues can be heightened during periods where we are developing and introducing multiple new products to the market, as any performance issues we encounter in one technology or product could impact the performance or timing of delivery of other products. Our products may also suffer degradation of performance and reliability over time.

If reliability, quality, security or network monitoring problems develop, a number of negative effects on our business could result, including:

•reduced orders from existing customers;

•declining interest from potential customers;

•delays in our ability to recognize revenue or in collecting accounts receivables;

•increased costs associated with fixing hardware or software defects or replacing products;

•high service and warranty expenses;

•delays in shipments;

•high inventory excess and obsolescence expense;

•high levels of product returns;

•diversion of our engineering personnel from our product development efforts; and

•payment of liquidated damages, performance guarantees or similar penalties.

Because we outsource the manufacturing of certain components of our products, we may also be subject to product performance problems as a result of the acts or omissions of third parties, and we may not have adequate compensating remedies against such third parties or otherwise implement effective measures to mitigate such problems.

From time to time, we encounter interruptions or delays in the activation of our products at a customer’s site. These interruptions or delays may result from product performance problems or from issues with installation and activation, some of which are outside our control, such as supply chain disruptions affecting our customers or us. For example, in 2022, we experienced project delays due to incomplete customer readiness and the unavailability of certain customer resources and customer furnished prerequisites required for project implementation. If we experience significant interruptions or delays that we cannot promptly resolve, the associated revenue for these installations may be delayed or confidence in our products could be undermined, which could cause us to lose customers, fail to add new customers, and consequently harm our financial results.

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We are dependent on a small number of key customers for a significant portion of our revenue from period to period and the loss of, or a significant reduction in, orders from one or more of our key customers would reduce our revenue and harm our operating results.

A relatively small number of customers accounts for a large percentage of our revenue from period to period. For example, for the quarter ended April 1, 2023, our top ten customers accounted for approximately 46% of our total revenue and no customer accounted for 10% or more of the Company's total revenue. For 2022, our top ten customers accounted for approximately 48% of our total revenue and one customer accounted for 11% of our total revenue. Our business will likely be harmed if any of our key customers, for whatever reason, substantially reduce, delay or stop their orders from us. In addition, our business will be harmed if we fail to maintain our competitive advantage with our key customers or do not add new large and medium customers over time. We continue to expect a relatively small number of customers to continue to account for a large percentage of revenue from period to period. However, customer consolidation could reduce the number of key customers that generate a significant percentage of our revenue and may increase the risks relating to dependence on a small number of customers.

Our ability to continue to generate revenue from our key customers will depend on our ability to maintain strong relationships with these customers and introduce competitive new products at competitive prices. In most cases, our sales are made to these customers pursuant to standard purchase agreements, which may be canceled or reduced readily, rather than long-term purchase commitments that would require these customers to purchase any minimum or guaranteed volumes orders. In the event of a cancellation or reduction of an order, we may not have enough time to reduce operating expenses to minimize the effect of the lost revenue on our business. Our operating results will continue to depend on our ability to sell our products to our key customers. In addition, we must regularly compete for and win business with existing and new customers across all of our customer segments.

In addition, global economic conditions may affect the network spending, procurement strategies, or business practices of our key customers. If any of our key customers experience a loss in revenue due to weakening economic conditions, public health crisis, their corporate borrowing costs being materially impacted by rising interest rates, or other adverse occurrences, they may reduce or delay capital spending generally or with respect to our products, which could materially adversely affect our business and results of operations.

The manufacturing process for our optical engine and the assembly of our finished products are complex. The partial or complete loss of any of our manufacturing facilities, a reduction in yields of our PICs or an inability to scale capacity to meet customer demands could harm our business.

The manufacturing process for our optical engine, including the PICs, DSPs and specialized ASICs, and the assembly of our finished products are complex. In the event that any of our manufacturing facilities utilized to build these components and assemble our finished products was fully or partially destroyed, or shut down, as a result of a natural disaster, work stoppage or otherwise, it could severely limit our ability to deliver and sell our products or support new product development. Because of the complex nature of our manufacturing facilities, such loss would take a considerable amount of time to repair or replace. The partial or complete loss of any of our manufacturing facilities, or an event causing the interruption in our use of any such facilities, whether as a result of a natural disaster, a public health crisis like the COVID-19 pandemic, work stoppage or otherwise, for any extended period of time, could cause our business, financial condition and results of operations to be harmed.

Minor deviations in the PIC manufacturing process can cause substantial decreases in yields and, in some cases, cause production to be suspended. In the past, we have had significant variances in our PIC yields, including production interruptions and suspensions, and may in the future have continued yield variances, including additional interruptions or suspensions. Lower than expected yields from our PIC manufacturing process or defects, integration issues or other performance problems in our products could limit our ability to satisfy customer demand requirements and could damage customer relations and harm our business, reputation and operating results.

Our inability to obtain sufficient manufacturing capacity to meet demand, either in our own facilities or through foundry or similar arrangements with third parties, could also harm our relationships with our customers, our business and our results of operations. Additionally, if we are unable to fully utilize our own manufacturing facilities, this may also reduce our efficiency and lower our gross margins.

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If we lose key personnel or fail to attract, upskill and retain qualified personnel when needed, our business may be harmed.

Our success depends to a significant degree upon the continued contributions of our key management, engineering, sales and marketing, and finance personnel, many of whom will be approaching retirement age in the next decade and many of whom would be difficult to replace. For example, senior members of our engineering team have unique technical experience that would be difficult to replace. Because our products are complex, we must also hire and retain highly trained customer service and support personnel to ensure that the deployment of our products does not result in network disruption for our customers. We believe our future success will depend in large part upon our ability to identify, attract, upskill and retain highly skilled and diverse personnel, and competition for these individuals is intense in our industry, especially in the San Francisco Bay Area where we are headquartered and, increasingly, in certain cities and regions where we have operations outside the United States as well. The loss of the services of any of our key personnel, the inability to identify, attract or retain qualified personnel in the future or delays in hiring qualified personnel, particularly engineers and sales personnel, could make it difficult for us to manage our business and meet key objectives, such as timely product introductions. These risks may be exacerbated due to a strong labor market with a competitive wage environment and attrition or a decline in the pool of available talent. In addition, we do not have long-term employment contracts or key person life insurance covering any of our key personnel. If we are unable to identify, attract and retain qualified personnel, we may be unable to manage our business effectively, and our results of operations could suffer.

The effects of the ongoing COVID-19 pandemic or other public health concerns could have a material adverse effect on our business, manufacturing operations and results of operations.

The impact of the COVID-19 pandemic or other public health concerns on our business and results of operations in the future remains uncertain and is dependent in part on infection, morbidity and disability rates, the emergence of new viruses, the continued effectiveness and availability of vaccinations, and broader global macroeconomic developments. During the COVID-19 pandemic, we at times temporarily closed or substantially limited the presence of personnel in some of our offices, implemented travel restrictions and modified our participation in various industry events. The COVID-19 pandemic also at times contributed to delays in certain operational processes, and it led to disruption and delays in our global supply chain and manufacturing operations, logistics operations and customer support operations, including shipping delays, higher transport costs, and certain limitations on our ability to access customer fulfillment and service sites. It also led to capacity issues, longer lead times, increased costs and shortages with certain component suppliers, including for semiconductors, impacting our operational processes and results of operations. We may face further disruptions or restrictions on our ability to source, manufacture or distribute our products due to existing or additional governmental restrictions in multiple countries on business operations and movement of people and products. If we experience pronounced disruptions in our operations or in our ability to service our customers, including due to COVID-19 or other infections or quarantines among our employees and service providers, or if we face continued supply chain disruption or curtailed customer demand, these factors may materially adversely impact our business and results of operations. We could also face negative impacts on our liquidity and capital resources in the future due to the effects of the COVID-19 pandemic or other public health concerns, and their impacts on our customers, suppliers, third-party service providers and capital markets.

If our contract manufacturers do not perform as we expect, our business may be harmed.

We rely on third-party contract manufacturers to perform a portion of the manufacturing of our products, and our future success will depend on our ability to have sufficient volumes of our products manufactured in a cost-effective and quality-controlled manner. We have engaged third parties to manufacture certain elements of our products at multiple contract manufacturing sites located around the world but do not have long-term agreements in place with some of our manufacturers and suppliers that would guarantee product availability, or the continuation of particular pricing or payment terms. We face a number of risks due to our dependence on contract manufacturers, including:

•reduced control over delivery schedules, particularly for international contract manufacturing sites;

•risks related to dependency on certain contract manufacturers;

•reliance on the quality assurance procedures of third parties;

•potential uncertainty regarding manufacturing yields and costs;

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•potential lack of adequate capacity during periods of high demand or inability to fulfill manufacturing orders due to supply issues;

•potential variability of pricing or payment terms due to agreement length;

•risks and uncertainties associated with the locations or countries where our products are manufactured, including potential manufacturing disruptions caused by geopolitical events, military actions, work stoppages or other social factors, natural disasters or other environmental factors, or international health emergencies, such as the COVID-19 pandemic;

•counterparty risk, particularly if our contract manufacturers are sensitive to inflation and interest-rate risk;

•limited warranties on components; and

•potential misappropriation of our intellectual property.

Any of these risks could impair our ability to fulfill orders. Our products are built with and incorporate increasingly sophisticated technology and any delays by our contract manufacturers or their inability to meet our product specifications or quality standards may cause us to be unable to meet the delivery requirements of our customers, which could decrease customer satisfaction and harm our product sales. In addition, if our contract manufacturers are unable or unwilling to continue manufacturing our products or components of our products in required volumes or our relationship with any of our contract manufacturers is discontinued for any reason, we would be required to identify and qualify alternative manufacturers, which could cause us to be unable to meet our supply requirements to our customers and result in the breach of our customer agreements. Qualifying a new contract manufacturer and commencing volume production is expensive and time-consuming. If we are required to change or qualify a new contract manufacturer, we could lose revenue and damage our customer relationships.

Increased consolidation among our customers and suppliers in the communications networking industry has had, and could continue to have, an adverse effect on our business and results of operations.

We have seen increased consolidation in the communications networking industry over the past few years, which has adversely affected our business and results of operations. Customer consolidation in the past has led to changes in buying patterns, slowdowns in spending, redeployment of existing equipment and re-architecture of parts of existing networks or future networks, as the combined companies evaluate the needs of the combined business. Moreover, the significant purchasing power of these large companies can increase pricing and competitive pressures for us, including the potential for decreases in our average selling prices. If one of our customers is acquired by another company that does not rely on us to provide it with products or relies on another provider of similar products, we may lose that customer’s business. Such consolidation may further reduce the number of customers that generate a significant percentage of our revenue and may exacerbate the risks relating to dependence on a small number of customers. Any of the foregoing results will adversely affect our business, financial condition and results of operations.

In addition, our suppliers in the communications networking industry have recently continued to consolidate. For example, II-VI acquired Finisar in 2019 and then acquired Coherent in 2022. Supplier consolidation may lead to increased prices of components for our products, deployment delays or a disruption in output. In addition, such consolidation may exacerbate the risks relating to our dependence on a small number of suppliers for certain components and materials that are required to manufacture our products.

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We rely on various third-party service partners to help complement our global operations, and failure to adequately manage these relationships could adversely impact our financial results and relationships with customers.

We rely on a number of third-party service partners, both domestic and international, to complement our global operations. We rely upon these partners for certain installation, maintenance, logistics and support functions. Services provided by these partners typically relate to the design, construction and operation of customer networks. Over time, the scope of work performed by our service partners is likely to increasingly include areas where we have less experience providing or managing such services. We must successfully identify, assess, train and certify qualified service partners in order to ensure the proper installation, deployment and maintenance of our products. The vetting and certification of these partners, particularly outside the U.S., can be costly and time-consuming, and certain partners may not have the same operational history, financial resources and scale as we have. Additionally, certain service partners may provide similar services for other companies, including our competitors. We may not be able to manage our relationships with our service partners effectively, and we cannot be certain that they will be able to deliver services in the manner or time required, that we will be able to maintain the continuity of their services, or that they will adhere to our approach to ethical business practices. We may also be exposed to a number of risks or challenges relating to the performance of our service partners, including:

•delays in recognizing revenue;

•liability for injuries to persons, damage to property or other claims relating to the actions or omissions of our service partners;

•our services revenue and gross margin may be adversely affected; and

•our relationships with customers could suffer.

If we do not effectively manage our relationships with third-party service partners, or if they fail to perform the services we request in the manner or time required, our financial results and relationships with our customers could be adversely affected.

We must respond to rapid technological change and comply with evolving industry standards and requirements for our products to be successful.

The optical transport networking equipment market is characterized by rapid technological change, changes in customer requirements and evolving industry standards. We continually invest in research and development to sustain or enhance our existing products, but the introduction of new communications technologies and the emergence of new industry standards or requirements could render our products obsolete. Further, in developing our products, we have made, and will continue to make, assumptions with respect to which standards or requirements will be adopted by our customers and competitors. If the standards or requirements adopted by our prospective customers are different from those on which we have focused our efforts, market acceptance of our products would be reduced or delayed, and our business would be harmed. We are continuing to invest a significant portion of our research and development efforts in the development of our next-generation products. We expect our competitors will continue to improve the performance of their existing products and introduce new products and technologies and to influence customers’ buying criteria so as to emphasize product capabilities that we do not, or may not, possess. To be competitive, we must increase our understanding of competitive dynamics in our markets, better anticipate future customer requirements and continue to invest significant resources in research and development, sales and marketing, and customer support. The demand for investment resources may also increase as the technologies we develop and utilize become more complex. If we do not anticipate these future customer requirements and invest in the technologies necessary to enable us to have and sell the appropriate solutions, our competitive position and future sales may be limited, which would have an adverse effect on our business and financial condition. We may not have sufficient resources to undertake these investments and we may not be able to make the technological advances necessary to be competitive and successful in the markets we serve.

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If we fail to accurately forecast our manufacturing requirements or customer demand, we could incur additional costs, including inventory write-downs or equipment write-offs, which would adversely affect our business and results of operations.

We generate forecasts of future demand for our products several months prior to the scheduled delivery to our prospective customers. This requires us to make significant investments before we know if corresponding revenue will be recognized. Lead times vary significantly for materials and components, including ASICs, that we need to order for the manufacture of our products and depend on factors such as the specific supplier, contract terms and demand for each component at a given time. In the past, we have experienced lengthened lead times for certain components, and we continue to see long lead times for certain components due to industry-wide supply chain challenges, which makes forecasting more challenging. We may be required to purchase increased levels of such components to satisfy our delivery commitments to our customers as a result of longer lead times for components. In addition, we must manage our inventory to ensure we continue to meet our commitments as we introduce new products or make enhancements to our existing products.

If we overestimate market demand for our products, including as a result of customers changing their purchasing patterns in response to the evolving supply chain environment, and, as a result, increase our inventory in anticipation of customer orders that do not materialize, we will have excess inventory. This could result in increased risk of obsolescence and significant inventory write-downs. If we underestimate demand for our products, we will have inadequate inventory, which could slow down or interrupt the manufacturing of our products, cause delays in shipments and our ability to recognize revenue, and result in potential loss of customers to competitors. In addition, we may be unable to meet our supply commitments to customers, which could result in a loss of certain customer opportunities or a breach of our customer agreements.

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Actions that we are taking or may in the future take to restructure our business to cut costs and align our operating structure with current or future opportunities may not be as effective as anticipated and may have negative consequences.

We have incurred, and may in the future incur, substantial costs in connection with restructuring plans. Although these restructuring initiatives may be taken to improve our operating efficiency and to reallocate resources to align more closely with our evolving business model and current and future opportunities, they may not result in the benefits we anticipate. We incur substantial costs to implement restructuring plans, and our restructuring activities may subject us to reputational and litigation risks. Our past restructuring plans do not provide any assurance that we will realize anticipated cost savings or other benefits from any restructuring plans we implement. In addition, restructuring plans may have other consequences, such as attrition beyond any planned reductions in workforce or a negative effect on employee morale and productivity or our ability to attract highly skilled employees. Restructuring presents other potential significant risks such as the actual or perceived disruption of service or reduction in service standards to customers, loss of sales, the failure to preserve supplier relationships and diversion of management attention. In addition, as a result of these restructuring actions, our ability to execute on product development, address key market opportunities or meet customer demand could be materially and adversely affected. Further, any anticipated benefits from these restructuring initiatives may be realized later than expected or not at all, and the ongoing costs of implementing these measures may be greater than anticipated. As a result, current or future restructuring plans may affect our revenue and other operating results.

Our large customers have substantial negotiating leverage, which may cause us to agree to terms and conditions that result in lower average selling prices and potentially increased cost of sales leading to lower gross margin, each of which would harm our results of operations.

Many of our customers are large service providers and ICPs that have substantial purchasing power and leverage in negotiating contractual arrangements with us. In addition, customer consolidation in the past few years has created combined companies that are even larger and have greater negotiating leverage. Our customers have sought and may continue to seek advantageous pricing, payment and other commercial terms. This may further impact our profitability if we are unable to recover through price increases passed along to these customers additional costs we have incurred from inflationary pressures to the supply chain or shipping and freight. We have also occasionally agreed and may continue to agree to unfavorable commercial terms with these customers, including the potential of reducing the average selling price of our products, increasing cost of sales or agreeing to extended payment terms in response to these commercial requirements or competitive pricing pressures. Continued inflation could decrease the profitability of customer contracts, particularly those with extended payment terms, that are not indexed to inflation. If we are compelled to agree to disadvantageous terms and conditions, unable to comply with such terms and conditions, or adapt our business model and operations to such terms and conditions, then our operating results will be negatively impacted.

Our sales cycle can be long and unpredictable, which could result in an unexpected revenue shortfall in any given quarter.

Our products can have a lengthy sales cycle, which can extend from six to twelve months and may take even longer for larger prospective customers. Our prospective customers conduct significant evaluation, testing, implementation and acceptance procedures before they purchase our products. We incur substantial sales and marketing expenses and expend significant management effort during this time, regardless of whether we make a sale. Supply chain disruptions have also at times lengthened, and may in the future lengthen, our sales cycle due to delays in the customer certification process for our products.

Because our sales cycle is long, we are likely to recognize higher inflation-related costs before recognizing the benefits of any price increases that we implement for our products. Moreover, the costs associated with our sales cycle may increase faster than our ability to increase prices. In addition, changes in regulatory requirements or uncertainty associated with the regulatory environment could delay or impede investment in network infrastructures and adversely affect our business, financial condition and results of operations.

Because the purchase of our equipment involves substantial cost, most of our customers wait to purchase our equipment until they are ready to deploy it in their network. As a result, it is difficult for us to accurately predict the timing of future purchases by our customers. In addition, product purchases are often subject to budget constraints, multiple approvals and unplanned administrative processing and other delays, including the need for the customer to obtain external financing. If sales expected from customers for a particular quarter are not realized in that quarter or at all, our revenue will be negatively impacted.

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Any acquisitions or strategic transactions that we undertake could disrupt our business and harm our financial condition and results of operations.

We have made strategic acquisitions of businesses, technologies and other assets in the past, including most recently the Acquisition. We may engage in acquisitions, divestitures or other strategic transactions in the future. In order to undertake certain of these transactions, we may use cash, issue equity that could dilute our current stockholders, or incur debt or assume indebtedness. If we are unable to achieve the anticipated efficiencies and strategic benefits of such transactions, it could adversely affect our business, financial condition and results of operations. In addition, the market price of our common stock could be adversely affected if investors and securities analysts react unfavorably to a strategic transaction or if the integration or the anticipated financial and strategic benefits of such transactions are not realized as rapidly as or to the extent anticipated by investors and securities analysts.

Acquisitions, divestitures or other strategic transactions can also result in adverse tax consequences, warranty or product liability exposure related to acquired assets, additional stock-based compensation expense, and write-up of acquired inventory to fair value. Divestitures can also result in contractual, employment or intellectual property liability related to divested assets. In addition, we may record goodwill and other purchased intangible assets in connection with an acquisition and incur impairment charges in the future. If our actual results, or the plans and estimates used in future impairment analyses, are less favorable than the original estimates used to assess the recoverability of these assets, we could incur additional impairment charges.

Acquisitions, divestitures or other strategic transactions also involve numerous risks that could disrupt our ongoing business and distract our management team, including:

•problems integrating the acquired operations, technologies or products with our own;

•challenges in divesting assets and intellectual property without negatively affecting our retained business;

•diversion of management’s attention from our core business;

•adverse effects on existing business relationships with suppliers and customers;

•risks associated with entering new markets or exiting existing markets; and

•loss of key employees.

Our failure to adequately manage the risks associated with an acquisition, divestment or strategic transaction could have an adverse effect on our business, financial condition and results of operations.

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Financial and Macroeconomic Risk Factors

We may be unable to generate the cash flow necessary to make anticipated capital expenditures, service our debt or grow our business.

We may not be able to generate sufficient cash flow from operations to make anticipated capital expenditures, service our debt or grow our business. Our ability to pay our expenses, service our debt and fund planned capital expenditures will depend on our future performance, which will be affected by general economic, competitive, legislative, political, regulatory, public health issues and other factors beyond our control, and our ability to continue to realize synergies and anticipated cost savings. If we are unable to generate sufficient cash flow from operations to service our debt or to make anticipated capital expenditures, we may be required to sell assets, reduce capital expenditures, borrow additional funds or evaluate alternatives for efficiently funding our capital expenditures and ongoing operations, including the issuance of equity, equity-linked and debt securities.

Inflation may adversely affect us by increasing costs beyond what we can recover through price increases.

Inflation, which has continued in the U.S. and globally, can adversely affect us by increasing the costs of labor, supplies and other costs of doing business, and price increases within our supply chain have negatively affected our gross margin. In an inflationary environment, our ability to raise prices or add additional cost-recovery surcharges of a magnitude sufficient to match the rate of inflation, on a timely basis, may be constrained by customer resistance and competitive concerns, as well as industry-specific and other economic conditions, which would reduce our profit margins. Moreover, even if we seek to implement price increases in response to inflationary pressures, because of our long sales cycle, we may recognize increased costs as a result of inflation before we are able to recognize the benefits of any such price increases. We have experienced increases in the prices of labor, supplies and other costs of doing business and continued inflationary pressures could continue to adversely impact our profitability.

Unfavorable macroeconomic and market conditions may adversely affect our industry, business and financial results.

In the past, unfavorable macroeconomic and market conditions have resulted in sustained periods of decreased demand for optical communications products and slowdowns in the telecommunications industry in which we operate. Such slowdowns may result in:

•reduced or delayed demand for our products as a result of constraints on capital spending by our customers;

•increased price competition for our products, not only from our competitors, but also as a result of the utilization of inventoried or underutilized products by our customers or potential customers, which could put additional downward pressure on our near-term gross profits;

•risk of excess or obsolete inventories;

•our customers facing financial difficulties, including bankruptcy;

•delayed collections of accounts receivable amounts or payment defaults;

•excess internal manufacturing capacity and higher associated overhead costs as a percentage of revenue; and

•more limited ability to accurately forecast our business, operating capital needs and future financial performance.

The COVID-19 pandemic created significant uncertainty in global macroeconomic conditions and capital markets, credit markets, and, in particular, supply chains continue to experience high levels of disruption, volatility and uncertainty. High inflation, high interest rates, the recent collapse of several financial institutions, and other signs of economic disruption, have also contributed to adverse global macroeconomic conditions. These conditions may also result in the tightening of credit markets, which could limit or delay our customers’ ability to obtain necessary financing for their purchases of our products.

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Our customers may delay or cancel their purchases or increase the time they take to pay or default on their payment obligations due to a lack of liquidity in the capital markets, the continued uncertainty in the global economic environment or inflationary concerns, which could result in a higher level of bad debt expense and would negatively affect our business and operating results. In addition, currency fluctuations could negatively affect our international customers’ ability or desire to purchase our products.

A lack of liquidity and economic uncertainty may also adversely affect our suppliers or the terms on which we purchase products from these suppliers. These impacts could limit our ability to obtain components for our products from these suppliers and could adversely impact our supply chain or the delivery schedule to our customers. Suppliers could also require us to purchase more expensive components, or re-design our products, which could cause increases in the cost of our products and delays in the manufacturing and delivery of our products. Such events could harm our gross margin and harm our reputation and our customer relationships, either of which could harm our business and operating results.

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If we need additional capital in the future, it may not be available to us on favorable terms, or at all.

Our business requires significant capital. We have historically relied on outside debt or equity financing as well as cash flow from operations to fund our operations, capital expenditures and expansion. For example, in September 2018, we issued convertible senior notes due September 1, 2024 (the “2024 Notes”) to pay the cost of the Capped Calls (as defined below) to fund the cash portion of the purchase price of the Acquisition, and for general corporate purposes. In August 2019 and as amended thereafter, we entered into the Prior Credit Agreement to provide additional working capital flexibility to manage our business. In addition, in March 2020, we issued convertible senior notes due March 1, 2027 (the “2027 Notes”) to raise additional funds for general corporate purposes, including working capital to fund growth and potential strategic projects. On August 12, 2020, we entered into an Open Market Sales Agreement with Jefferies LLC ("Jefferies") under which we issued and sold through Jefferies, acting as agent or principal, shares of our common stock having an aggregate offering price of $96.3 million, to raise funds for general corporate purposes, including working capital and capital expenditures. In June 2022, we terminated the Prior Credit Agreement and entered into the Loan Agreement to repay existing debt (including amounts outstanding under the Prior Credit Agreement) and for working capital and general corporate purposes, including to fund growth. In August 2022, we issued convertible senior notes due August 1, 2028 (the “2028 Notes” and, together with the 2024 Notes and the 2027 Notes, the “convertible senior notes”) to repurchase a portion of the 2024 Notes, for general corporate purposes, including working capital and to fund growth and potential strategic projects. We may require additional capital from equity or equity-linked financing, debt financing or other financings in the future to fund our operations, respond to competitive pressures or strategic opportunities or to refinance our existing debt obligations. In the event that we require additional capital, we may not be able to secure timely additional financing, or restructure existing debt, on favorable terms, or at all, and may be affected by the impacts on capital markets of global economic uncertainty, uncertainty in the financial and banking industry and inflationary pressures. The terms of any additional financings or restructurings may place limits on our financial and operating flexibility. If we raise additional funds through further issuances of equity, convertible debt securities or other securities convertible into equity, our existing stockholders could suffer dilution in their percentage ownership of our company, and any new securities we issue could have rights, preferences and privileges senior to those of holders of our common stock. If we are unable to obtain adequate financing or financing on terms satisfactory to us, if and when we require it, our ability to grow or support our business and to respond to business challenges could be limited and our business will be harmed.

Our Loan Agreement and any other credit or similar agreements into which we may enter in the future may restrict our operations, particularly our ability to respond to changes or to take certain actions regarding our business.

Our Loan Agreement contains a number of restrictive covenants that may impose operating and financial restrictions on us and limit our ability to engage in acts that may be in our long-term interest, including restrictions on our ability to incur debt, create liens and encumbrances, engage in certain fundamental changes, dispose of assets, prepay certain indebtedness, make restricted payments, make investments, and engage in transactions with affiliates, in each case subject to limitations and exceptions set forth in the Loan Agreement. The Loan Agreement also contains a financial covenant that requires the Company to maintain a minimum fixed charge coverage ratio.

The Loan Agreement also contains customary events of default, such as the failure to pay obligations when due, a material breach of representations and warranties or covenants, the entry of material judgments against certain of our subsidiaries, the initiation of bankruptcy or insolvency proceedings of certain of our subsidiaries, defaults on certain other indebtedness, a change of control, the failure of the guaranty of certain of our subsidiaries to be in effect or the failure of the security documents to create valid and perfected liens or the loan documents to be valid and enforceable, which could have a material adverse effect on our business, operations, and financial results. Upon an event of default, the lenders may, subject to customary cure rights, require the immediate payment of all amounts outstanding and foreclose on collateral, which could force us into bankruptcy or liquidation. In the event that our lenders accelerated the repayment of the borrowings, we may not have sufficient assets to repay that indebtedness. Any acceleration of amounts due under the Loan Agreement would likely have a material adverse effect on us. As a result of these restrictions, we may be limited in how we conduct business, unable to raise additional debt or equity financing to operate during general economic or business downturns, or unable to compete effectively or to take advantage of new business opportunities.

In addition, we may enter into other credit agreements or other debt arrangements from time to time which contain similar or more extensive restrictive covenants and events of default, in which case we may face similar or additional limitations as a result of the terms of those credit agreements or other debt arrangements.

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Our debt obligations may adversely affect our ability to raise additional capital and will be a burden on our future cash resources, particularly if we elect to settle these obligations in cash upon conversion or upon maturity or required repurchase.

As of April 1, 2023, the outstanding aggregate principal amount of the 2024 Notes, the 2027 Notes and the 2028 Notes was $102.7 million, $200.0 million and $373.8 million, respectively. The degree to which we are leveraged could have important consequences, including, but not limited to, the following:

•our ability to obtain additional financing in the future for working capital, capital expenditures, acquisitions, litigation, general corporate or other purposes may be limited; and

•a substantial portion of our future cash balance may be dedicated to the payment of the principal of our indebtedness as we have stated the intention to pay the principal amount of each series of convertible senior notes in cash upon conversion or when otherwise due, such that we would not have those funds available for use in our business.

Our ability to meet our payment obligations under our debt instruments, including the convertible senior notes, depends on our future cash flow performance. This, to some extent, is subject to general economic, financial, competitive, legislative and regulatory factors, as well as other factors that may be beyond our control. There can be no assurance that our business will generate positive cash flow from operations, or that additional capital will be available to us, in an amount sufficient to enable us to meet our debt payment obligations and to fund other liquidity needs. If we are unable to generate sufficient cash flow to service our debt obligations, we may need to refinance or restructure our debt, sell assets, reduce or delay capital investments, or seek to raise additional capital. If we are unable to implement one or more of these alternatives, we may be unable to meet our debt payment obligations. As a result, we may be more vulnerable to economic downturns, less able to withstand competitive pressures and less flexible in responding to changing business and economic conditions.

Our international sales and operations subject us to additional risks that may harm our operating results.

Sales of our products into international markets continue to be an important part of our business. During 2022, 2021 and 2020, we derived approximately 45%, 53% and 54%, respectively, of our revenue from customers outside of the United States. We expect that significant management attention and financial resources will be required for our international activities over the foreseeable future as we continue to operate in international markets. In some countries, our success in selling our products and growing revenue will depend in part on our ability to form relationships with local partners. Our inability to identify appropriate partners or reach mutually satisfactory arrangements for international sales of our products could impact our ability to maintain or increase international market demand for our products. In addition, many of the companies we compete against internationally have greater name recognition and a more substantial sales and marketing presence.

We have sales and support personnel in the Americas, EMEA (with offices in the Middle East) and APAC (including China). In addition, we have established development centers in Canada, China, Finland, Germany, India, Portugal and Sweden. There is no assurance that our reliance upon development resources in international locations will enable us to achieve meaningful cost reductions or greater resource efficiency. We are also aggressively pursuing opportunities with customers in additional geographies, including EMEA, APAC and Latin America. Our efforts to increase our sales and capture market share in international markets may ultimately be unsuccessful and may limit our growth and adversely impact our business, financial condition and results of operations.

New or continuing disruptions of the global supply chain or the manufacture of our customer’s components caused by events outside of our control could impact our results of operations by impairing our ability to timely and efficiently deliver our products or provide installation and maintenance services to our customers.

In addition, our operations in Russia have been impacted by sanctions and other trade controls imposed by the United States and other governments in response to Russia's military operations in Ukraine which started in February 2022. The imposition of these sanctions and controls have prevented us from performing existing contracts. For the year ended December 31, 2022, less than 1% of our revenue was derived from customers in Russia. A de minimis percentage of our revenue is derived from Russian customers including channel partners and customers in other countries whose contracts with us may involve Russian entities.

Our international operations are subject to inherent risks, and our future results could be adversely affected by a variety of factors, many of which are outside of our control, including:

•greater difficulty in collecting accounts receivable and longer collection periods;

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•difficulties of managing and staffing international offices, and the increased travel, infrastructure and legal compliance costs associated with having multiple international locations;

•political, social and economic instability, including wars, terrorism, political unrest, boycotts, curtailment of trade and other business restrictions;

•tariff and trade barriers and other regulatory requirements, contractual limitations, or customer specifications impacting our ability to sell or develop our products in certain foreign markets;

•less effective protection of intellectual property than is afforded to us in the United States or other developed countries;

•potentially adverse tax consequences;

•natural disasters, acts of war or terrorism, and health crises, including the COVID-19 pandemic;

•changes to free trade agreements, trade protection measures, tariffs, export compliance, domestic preference procurement requirements, qualification to transact business and additional regulatory requirements, including changes related to policy and other changes made by the federal government in the United States, other national governments or multinational bodies; and

•effects of changes in currency exchange rates, particularly relative increases in the exchange rate of the U.S. dollar compared to other currencies that could negatively affect our financial results and cash flows.

The concentration of the storage and distribution of our inventory primarily in one location in southeastern Asia increases the risks of our global operations. As a result, our operations are susceptible to local and regional factors in that area, such as accidents, system failures and weather conditions, natural disasters (including floods and earthquakes and related fires), and other unforeseen events and circumstances. Any significant interruption in the operations or availability of the storage and distribution facilities in which our inventory is held could lead to logistical and fulfillment issues or increased costs, which could have a material adverse effect on our results of operations, financial condition and cash flows.

International customers may also require that we comply with certain testing or customization of our products to conform to local standards. The product development costs to test or customize our products could be extensive and a material expense for us.

Our international operations are also subject to increasingly complex foreign and U.S. laws and regulations, including, but not limited to, anti-corruption laws, such as the U.S. Foreign Corrupt Practices Act of 1977, as amended (the "FCPA"), and the United Kingdom Bribery Act 2010, as amended (the “UK Bribery Act”), antitrust or competition laws, anti-money laundering laws, various trade controls, national security related regulations, and data privacy laws, among others. Violations of these laws and regulations could result in fines and penalties, criminal sanctions against us, our officers, or our employees, prohibitions on the conduct of our business and on our ability to offer our products and services in one or more countries, and could also materially affect our reputation, our international expansion efforts, our ability to attract and retain employees, our business, and our operating results. Although we have implemented policies, procedures and training designed to ensure compliance with these laws and regulations, there can be no complete assurance that any individual employee, contractor or agent will not violate our policies. Additionally, the costs of complying with these laws (including the costs of investigations, auditing and monitoring) could also adversely affect our current or future business.

As we continue to expand our business globally, our success will depend, in large part, on our ability to effectively anticipate and manage these and other risks and expenses associated with our international operations. Our failure to manage any of these risks successfully could harm our international operations and reduce our international sales, adversely affecting our business, financial condition and results of operations.

We may be adversely affected by fluctuations in currency exchange rates.

A portion of our sales and expenses stem from countries outside of the United States, and are in currencies other than U.S. dollars, and therefore subject to foreign currency fluctuation. Accordingly, fluctuations in foreign currency rates could have a material impact on our financial results in future periods. We have from time to time entered into foreign currency exchange forward contracts to reduce the impact of foreign currency fluctuations on certain non-functional currency account balances. Even if we have forward contracts in place, while they may reduce some of the impact of currency exchange rate movements on certain transactions, they would not cover all foreign-denominated transactions and therefore may not entirely eliminate the impact of fluctuations in exchange rates on our results of operations and financial condition.

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Our effective tax rate may increase or fluctuate, which could increase our income tax expense and reduce our net income.

Our effective tax rate can be adversely affected by several factors, many of which are outside of our control, including:

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

•changes in the relative proportions of revenue and income before taxes in the various jurisdictions in which we operate that have differing statutory tax rates;

•changing tax laws, regulations, rates and interpretations in multiple jurisdictions in which we operate;

•changes to the financial accounting rules for income taxes;

•the tax effects of acquisitions; and

•the resolution of issues arising from tax audits.

The United States recently enacted the Inflation Reduction Act of 2022, which, among other changes, implements a 1% excise tax on certain stock buybacks, which would generally apply to repurchases of stock by U.S. corporations, including certain transactions with the Capped Calls (as defined below). Many countries and organizations such as the Organization for Economic Cooperation and Development are actively considering changes to existing tax laws or have proposed or enacted new laws, including an agreement to implement a 15% global minimum tax, that could increase our tax obligations in countries where we do business or cause us to change the way we operate our business. The Council of the European Union has adopted this initiative by European Union member states by December 31, 2022, with implementation into the domestic laws of those states by the end of 2023. Any changes in U.S. federal, state or international tax laws or tax rulings could adversely affect our effective tax rate and our results of operations.

Beginning January 1, 2022, the Tax Cuts and Jobs Act of 2017 eliminated the right to deduct research and development expenditures for tax purposes in the period the expenses were incurred and instead requires all U.S. and foreign research and development expenditures to be amortized over five and 15 tax years, respectively. This provision may materially increase our effective tax rate and reduce our operating cash flows over time as we continue to utilize available net operating losses and tax credits.

We may issue additional shares of our common stock in connection with conversions of the 2024 Notes, the 2027 Notes or the 2028 Notes, and thereby dilute our existing stockholders and potentially adversely affect the market price of our common stock.

In the event that some or all of each series of convertible senior notes are converted and we elect to deliver shares of common stock to the extent permitted, the ownership interests of existing stockholders will be diluted, and any sales in the public market of any shares of our common stock issuable upon such conversion could adversely affect the prevailing market price of our common stock. In addition, the anticipated conversion of any series of convertible senior notes we have issued could depress the market price of our common stock.

The fundamental change provisions of the 2024 Notes, the 2027 Notes and the 2028 Notes may delay or prevent an otherwise beneficial takeover attempt of us.

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If a fundamental change, such as an acquisition of our company, occurs prior to the maturity of the 2024 Notes, the 2027 Notes or the 2028 Notes, holders of the applicable series of convertible senior notes will have the right, at their option, to require us to repurchase all or a portion of their convertible senior notes of such series. In addition, if such fundamental change also constitutes a make-whole fundamental change, the conversion rate for the applicable series of convertible senior notes may be increased upon conversion of the such series of convertible senior notes in connection with such make-whole fundamental change. Any increase in the conversion rate will be determined based on the date on which the make-whole fundamental change occurs or becomes effective and the price paid (or deemed paid) per share of our common stock in such transaction. Any such increase will be dilutive to our existing stockholders. Our obligation to repurchase any series of convertible senior notes or increase the conversion rate upon the occurrence of a make-whole fundamental change may, in certain circumstances, delay or prevent a takeover of us that might otherwise be beneficial to our stockholders.

The Capped Calls may affect the value of the 2024 Notes and our common stock.

In connection with the issuance of the 2024 Notes, we entered into capped call transactions (the "Capped Calls") with certain financial institutions who are the option counterparties. The Capped Calls are expected generally to reduce or offset the potential dilution upon conversion of the 2024 Notes or offset any cash payments we are required to make in excess of the principal amount of converted 2024 Notes, as the case may be, with such reduction or offset subject to a cap.

From time to time, the option counterparties or their respective affiliates may modify their hedge positions by entering into or unwinding various derivatives with respect to our common stock or purchasing or selling our common stock or other securities of ours in secondary market transactions prior to the maturity of the 2024 Notes. This activity could also cause an increase or a decrease in the market price of our common stock.

We are subject to counterparty risk with respect to the Capped Calls.

The option counterparties to the Capped Calls are financial institutions, and we will be subject to the risk that any or all of them might default under the Capped Calls. Our exposure to the credit risk of the counterparties will not be secured by any collateral. Past global economic conditions have resulted in the actual or perceived failure or financial difficulties of many financial institutions. If an option counterparty becomes subject to insolvency proceedings, we will become an unsecured creditor in those proceedings with a claim equal to our exposure at the time under the Capped Calls with such option counterparty. Our exposure will depend on many factors but, generally, an increase in our exposure will be correlated to an increase in the market price and in the volatility of our common stock. In addition, upon a default by an option counterparty, we may suffer adverse tax consequences and more dilution than we currently anticipate with respect to our common stock. We can provide no assurance as to the financial stability or viability of the option counterparties.

Legal and Regulatory Risk Factors

If we fail to protect our intellectual property rights, our competitive position could be harmed, or we could incur significant expense to enforce our rights.

We depend on our ability to protect our proprietary technology. We rely on a combination of methods to protect our intellectual property, including limiting access to certain information, and utilizing trade secret, patent, copyright and trademark laws and confidentiality agreements with employees and third parties, all of which offer only limited protection. The steps we have taken to protect our proprietary rights may be inadequate to preclude misappropriation or unauthorized disclosure of our proprietary information or infringement of our intellectual property rights, and our ability to police such misappropriation, unauthorized disclosure or infringement is uncertain, particularly in countries outside of the United States. This is likely to become an increasingly important issue as we expand our operations, product offerings and product development into countries that provide a lower level of intellectual property protection. We do not know whether any of our pending patent applications will result in the issuance of patents or whether the examination process will require us to narrow our claims, and even if patents are issued, they may be contested, circumvented or invalidated. Moreover, the rights granted under any issued patents may not provide us with a competitive advantage, and, as with any technology, competitors may be able to develop similar or superior technologies to our own now or in the future.

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Protecting against the unauthorized use of our products, trademarks and other proprietary rights is expensive, difficult, time consuming and, in some cases, impossible. Litigation may be necessary in the future to enforce or defend our intellectual property rights, to protect our trade secrets or to determine the validity or scope of the proprietary rights of others. Such litigation could result in substantial cost and diversion of management resources, either of which could harm our business, financial condition and results of operations. Furthermore, many of our current and potential competitors have the ability to dedicate substantially greater resources to enforce their intellectual property rights than we do. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing upon or misappropriating our intellectual property.

Claims by others that we infringe on their intellectual property rights could harm our business.

Our industry is characterized by the existence of a large number of patents and frequent claims and related litigation regarding patent and other intellectual property rights. In particular, many leading companies in the optical transport networking industry, including our competitors, have extensive patent portfolios with respect to optical transport networking technology. In addition, non-practicing patent holding companies seek to monetize patents they have purchased or otherwise obtained. We expect that infringement claims may increase as the number of products and competitors in our market increases and overlaps in technology implementation occur. From time to time, third parties may assert exclusive patent, copyright, trademark and other intellectual property rights to technologies and related standards that are important to our business or seek to invalidate the proprietary rights that we hold. Competitors or other third parties have asserted, and may continue to assert, claims or initiate litigation or other proceedings against us or our manufacturers, suppliers or customers alleging infringement of their proprietary rights, or seeking to invalidate our proprietary rights, with respect to our products and technology. In addition, in the past we have had certain patent licenses with third parties that have not been renewed, and if we cannot successfully renew these licenses, we could face claims of infringement. In the event that we are unsuccessful in defending against any such claims, or any resulting lawsuits or proceedings, we could incur liability for damages or have valuable proprietary rights invalidated. For additional information regarding certain of the legal proceedings in which we are involved, see Part I, Item 1, Note 11 under the heading “Legal Matters.”

Any claim of infringement from a third party, even one without merit, could cause us to incur substantial costs defending against the claim, and could distract our management from running our business. Furthermore, a party making such a claim, if successful, could secure a judgment that requires us to pay substantial damages or could include an injunction or other court order that could prevent us from offering our products. In addition, we might be required to seek a license for the use of such intellectual property, which may not be available on commercially reasonable terms or at all. Alternatively, we may be required to develop non-infringing technology, which would require significant effort and expense and may ultimately not be successful. Any of these events could harm our business, financial condition and results of operations.

Competitors and other third parties have and may continue to assert infringement claims against our customers and sales partners. Any of these claims may require us to initiate or defend potentially protracted and costly litigation on their behalf, regardless of the merits of these claims, because we generally indemnify our customers and sales partners from claims of infringement of proprietary rights of third parties. If any of these claims succeed, we may be forced to pay damages on behalf of our customers or sales partners, which could have an adverse effect on our business, financial condition and results of operations.

We also incorporate free and open source licensed software into our products. Although we monitor our use of such open source software closely, the terms of many open source licenses have not been interpreted by U.S. courts, and there is a risk that such licenses could be construed in a manner that could impose unanticipated conditions or restrictions on our ability to commercialize our products. In addition, non-compliance with open source software license terms and conditions could subject us to potential liability, including intellectual property infringement or contract claims. In such events, we may be required to seek licenses from third parties in order to continue offering our products, to re-engineer our products or to discontinue the sale of our products in the event re-engineering cannot be accomplished in a timely manner, any of which could adversely affect our business, financial condition and results of operations.

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Security incidents, such as data breaches and cyber-attacks, could compromise our intellectual property and proprietary or confidential information and cause significant damage to our business and reputation.

In the ordinary course of our business, we maintain sensitive data on our networks and systems, including data related to our intellectual property and data related to our business, customers and business partners, which may be considered proprietary or confidential information. This sensitive data includes certain personal information and other data relating to our employees and others. We also utilize third-party service providers to host, transmit, or otherwise process data in connection with our business activities, including our supply chain processes, operations, and communications. Companies, especially in the technology industry, have been increasingly subject to a wide variety of security incidents, cyber-attacks, malicious activity, including ransomware, malware and viruses, and other attempts to gain unauthorized access and disrupt systems and the confidentiality, security, and integrity of information, and we and our third-party service providers and suppliers have faced and may continue to face security threats and attacks from a variety of sources. In accordance with our flexible approach to work arrangements, many of our employees are working from home and accessing our corporate network via remote devices, which may be less secure than those used in our offices and thus could increase the potential for such events to occur.

While the secure maintenance of this information and the security of the systems used in our business are critical to our business and reputation, our network and storage applications, and those systems and other business applications maintained by our third-party providers, may be subject to unauthorized access by hackers or breached or otherwise compromised due to operator error, malfeasance or other system disruptions. It may be difficult to anticipate or immediately detect such security incidents or breaches and to prevent or mitigate damage caused as a result. Accordingly, a data breach, security incident, cyber-attack, attack using ransomware or other malware, or any other unauthorized access to systems used in our business or unauthorized acquisition, disclosure, or other processing of our information or other information that we or our third-party vendors maintain or otherwise process could compromise our intellectual property, disrupt our operations, or result in loss of or unauthorized access to or acquisition, disclosure, modification, misuse, corruption, unavailability, or destruction of proprietary or confidential information. While we work to safeguard our internal networks and systems and validate the security of our third-party suppliers and providers to mitigate these potential risks, including through information security policies and employee awareness and training, there is no assurance that such actions will be sufficient to prevent cyber-attacks or security breaches or incidents, and we cannot guarantee that our systems and networks or our third-party service providers’ systems and networks have not been breached or that they or any components of our supply chain do not contain exploitable defects or bugs, including defects or bugs that could result in a breach of or disruption to our systems and networks or the systems and networks of third parties that support our operations. We and third-party service providers also may face difficulties or delays in identifying or responding to security breaches and other security-related incidents. We have been subjected in the past to a range of incidents including phishing, emails purporting to come from an executive or vendor seeking payment requests, malware and communications from look-alike corporate domains. For example, in 2021, we experienced a phishing attack that resulted in an immaterial loss. While they have not had a material effect on our business or our network security to date, security breaches or incidents involving access to or improper use of our systems, networks or products, or those of third-party service providers, could compromise confidential or otherwise protected information, result in unauthorized acquisition, disclosure, modification, misuse, corruption, unavailability, or destruction of data, cause payments to be diverted to fraudulent accounts, or otherwise disrupt our operations. Security breaches or incidents, or any reports or perceptions that they have occurred, could cause us to incur significant costs and expenses to remediate and otherwise respond to any actual or suspected breach or incident, subject us to regulatory actions and investigations, disrupt key business operations, result in claims, demands, and liability, and divert attention of management and key information technology resources, any of which could cause significant harm to our business and reputation. Even the perception of inadequate security may damage our reputation and negatively impact our business. Further, we could be required to expend significant capital and other resources to address any security incident or breach and to attempt to prevent future security incidents and breaches.

Although we maintain insurance coverage that may cover certain liabilities in connection with some security breaches and other security incidents, we cannot be certain our insurance coverage will be adequate for liabilities actually incurred, including any consequential damages that may arise from such security incidents, that insurance will continue to be available to us on commercially reasonable terms (if 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, the occurrence of changes in our insurance policies, including premium increases or the imposition of large deductible or co-insurance requirements, or denials of coverage could have a material adverse effect on our business, including our financial condition, results of operations and reputation.

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If we fail to maintain effective internal controls over financial reporting in the future, the accuracy and timing of our financial reporting may be adversely affected.

We are required to comply with Section 404 of the Sarbanes-Oxley Act of 2002 ("SOX"). The provisions of SOX require, among other things, that we maintain effective internal controls over financial reporting and disclosure controls and procedures. Preparing our financial statements involves a number of complex processes, many of which are done manually and are dependent upon individual data input or review. These processes include, but are not limited to, calculating revenue, deferred revenue and inventory costs. While we continue to automate our processes and put in place controls to reduce the likelihood for errors, we expect that for the foreseeable future many of our processes will remain manually intensive and thus subject to human error. If we are unable to implement effective key operational controls around financial processes and successfully manage and monitor manual processes, we may fail to prevent or detect material misstatements in our financial statements, in which case investors may lose confidence in the accuracy and completeness of our financial reports and the market price of our securities may decline.

We are subject to various governmental export control, trade sanctions, and import laws and regulations that could impair our ability to compete in international markets or subject us to liability if we violate these controls.

In some cases, our products are subject to U.S. and foreign export control laws and regulations that may limit where and to whom we are permitted to sell our products, including the Export Administration Regulations administered by the U.S. Department of Commerce, and our activities may be subject to trade and economic sanctions, including those administered by the United States Department of the Treasury’s Office of Foreign Assets Control (collectively, “Trade Controls”). As such, a license may be required to export or re-export our products, or provide related services, to certain countries and end-users, and for certain end-uses. Further, our products incorporating encryption functionality may be subject to special controls applying to encryption items or certain reporting requirements.

We have procedures in place designed to ensure our compliance with Trade Controls, with which failure to comply could subject us to both civil and criminal penalties, including substantial fines, possible incarceration of responsible individuals for willful violations, possible loss of our export or import privileges, or reputational harm. Further, the process for obtaining necessary licenses may be time-consuming or unsuccessful, potentially causing delays in sales or losses of sales opportunities. Trade Controls are complex and dynamic regimes, and monitoring and ensuring compliance can be challenging, particularly given that our products are widely distributed throughout the world. Although we have no knowledge that our activities have resulted in material violations of Trade Controls, any failure by us or our partners to comply with applicable laws and regulations would have negative consequences for us, including reputational harm, government investigations, and penalties.

In addition, various countries regulate the import of certain technologies and have enacted laws that could limit our ability to distribute our products and certain product features or could limit our customers’ ability to implement our products in those countries. Changes in our products or changes in U.S. and foreign import and export regulations may create delays in the introduction of our products in international markets, prevent our customers with international operations from deploying our products throughout their global systems or, in some cases, prevent the import and export of our products to certain countries altogether. For example, the United States has imposed tariffs on a large variety of products originating from China, including some on components that are supplied to us from China. Depending upon the duration and implementation of these and future tariffs, as well as our ability to mitigate their impact, these tariffs could materially affect our business, including in the form of increased cost of goods sold, increased pricing for customers, and reduced sales. Additionally, the U.S. government has levied controls affecting the ability to send certain products and technology related to semiconductors, semiconductor manufacturing and supercomputing to China without an export license and adding additional entities to restricted party lists. It remains unclear what additional actions, if any, will be taken by the governments of the United States or China with respect to such trade and tariff matters. Any change in import and export regulations or related legislation, shift in approach to the enforcement or scope of existing regulations, or change in the countries, persons or technologies impacted 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 customers with international operations. Failure to comply with these and similar laws on a timely basis, or at all, or any limitation on our ability to develop, export or sell our products would adversely affect our business, financial condition and results of operations.

We are subject to environmental regulations that could adversely affect our business.

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We are subject to complex U.S. and foreign environmental rules and regulations or other social initiatives that impact how and where we manufacture our products. In particular, our manufacturing operations use substances that are regulated by various federal, state, local, foreign and international laws and regulations governing health, safety and the environment, including U.S. Environmental Protection Agency regulations and WEEE, RoHS and REACH regulations adopted by the E.U. From time to time, the E.U. restricts or considers restricting certain substances under these directives. For example, InP has been considered for restriction under RoHS. Any restriction of InP or any other substance integral to our systems could materially adversely affect our business, financial condition and operating results. In addition, if we experience a problem complying with these laws and regulations, it could cause an interruption or delay in our manufacturing operations or it could cause us to incur liabilities or costs related to health, safety or environmental remediation or compliance. We could also be subject to liability if we do not handle these substances in compliance with safety standards for handling, storage and transportation and applicable laws and regulations. If we experience a problem or fail to comply with such safety standards or laws and regulations, our business, financial condition and operating results may be harmed.

Regulations relating to environmental, social and governance matters, as well as customer and investor demands, may add operational complexity for us and may adversely affect our relationships with our customers, suppliers and investors.

There has been an increased focus on environmental, social and governance ("ESG") matters that affect companies globally, including by the SEC. A number of our customers have adopted, or may adopt, procurement policies that include environmental or social responsibility provisions or requirements that their suppliers should comply with, or they may seek to include such provisions or requirements in their procurement terms and conditions. An increasing number of investors are also requiring companies to disclose corporate ESG policies, practices and metrics. In addition, various jurisdictions are developing climate change-based laws or regulations that could cause us to incur additional direct costs for compliance, as well as indirect costs resulting from our customers, suppliers, or both, incurring additional compliance costs that are passed on to us. These legal and regulatory requirements, as well as investor expectations, on corporate ESG responsibility practices and disclosure, are subject to change, can be unpredictable, and may be difficult and expensive for us to comply with, given the complexity of our supply chain. If we are unable to comply with, or are unable to cause our suppliers or contract manufacturers to comply with such policies or provisions, or meet the requirements of our customers and investors, a customer may stop purchasing products from us, an investor may sell their shares or take legal action against us or a governmental entity may levy a penalty or take legal or regulatory action against us, which could harm our reputation, revenue and results of operations.

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We are subject to global laws and regulations governing privacy, data protection, and cybersecurity that could adversely affect our business or subject us to liability.

Data privacy, data protection, and cybersecurity are areas of increasing focus for our customers, governmental regulators and privacy advocates, and many jurisdictions, including the E.U., the United States, China and other regions, are evaluating or have implemented laws and regulations relating to cybersecurity, privacy and data protection, which can affect the market and requirements for networking and communications equipment. For example, the General Data Protection Regulation (“GDPR”) in effect in the E.U., and similar regulatory standards in effect in the United Kingdom, the Personal Information Protection Law ("PIPL") in China, the California Consumer Privacy Act (“CCPA”) and the California Privacy Rights Act (“CPRA”), other enacted or proposed legislation in the United States, and enacted or proposed legislation in other jurisdictions have created new compliance obligations with respect to data processing, privacy, data protection, and cybersecurity.

The laws, rules, regulations, standards and other actual and asserted obligations relating to privacy, data protection and cybersecurity to which we may be subject, or that otherwise apply to our business, are constantly evolving, and we expect that there will continue to be new proposed laws, regulations and industry standards concerning these matters in the United States, the E.U. and other jurisdictions. We cannot fully predict the impact of the GDPR, the PIPL, the CCPA, the CPRA or other laws or regulations, including those that may be modified or enacted in the future, or new or evolving industry standards or actual or asserted obligations, relating to cybersecurity, privacy, or data protection or processing on our business or operations. These laws, regulations, and standards have required us to modify our practices and policies relating to privacy, data protection, cybersecurity, and data processing, and to incur substantial costs and expenses in an effort to comply, and we expect to continue to incur such costs and expenses in the future and may find it necessary or appropriate to further modify our relevant practices and policies. Any actual or perceived failure by us or our customers, partners or vendors to comply with laws, regulations, or other actual or asserted obligations to which we are or are alleged to be subject relating to cybersecurity, privacy or data protection could result in claims, litigation, and regulatory investigations and other proceedings, as well as damage to our reputation. These could result in substantial costs, diversion of resources, fines, penalties, and other damages, and harm to our customer relationships, our market position, and our ability to attract new customers. Any of these could harm our business, financial condition and results of operations.

A portion of our revenue is generated by sales to government entities, which are subject to a number of uncertainties, challenges, and risks.

We currently sell many of our solutions to various government entities, and we may in the future increase sales to government entities. Sales to government entities are subject to a number of risks, including risks related to a highly competitive, expensive, and time consuming sales process, which often requires significant upfront time and expense without any assurance that we will complete a sale. If we are successfully awarded a government contract, such award may be subject to appeals, disputes, or litigation, including, but not limited to, bid protests by unsuccessful bidders. Government demand and payment for our solutions may be impacted by public sector budgetary cycles and funding authorizations, with funding reductions or delays adversely affecting public sector demand for our solutions. Government entities may also have statutory, contractual, or other legal rights to terminate contracts for convenience or due to a default. For purchases by the U.S. federal government, the government may require certain products to be made in, or be products of, the United States or other high-cost manufacturing locations, and all of our products may not be made in or products of jurisdictions that meet government requirements, and as a result, our business and results of operations may suffer. Contracts with government entities may also include preferential pricing terms, including, but not limited to, “most favored customer” pricing.

Additionally, we may be required to obtain special certifications to sell some or all of our solutions to government or quasi-government entities. Such certification requirements for our solutions may change, thereby restricting our ability to sell into the federal government sector until we have attained the revised certification. If our products and subscriptions are late in achieving or fail to achieve compliance with these certifications and standards, or our competitors achieve compliance with these certifications and standards before us, we may be disqualified from selling our products to such governmental entities, or be at a competitive disadvantage, which would harm our business, financial condition and results of operations. There are no assurances that we will find the terms for obtaining such certifications to be acceptable or that we will be successful in obtaining or maintaining the certifications.

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As a government contractor or subcontractor, we must comply with laws, regulations, and contractual provisions relating to the formation, administration, and performance of government contracts and inclusion on government contract vehicles, which affect how we and our partners do business with government agencies. As a result of actual or perceived noncompliance with government contracting laws, regulations, or contractual provisions, we may be subject to non-ordinary course audits and internal investigations which may prove costly to our business financially, divert management time, or limit our ability to continue selling our products and services to our government customers. These laws and regulations may impose other added costs on our business, and failure to comply with these or other applicable regulations and requirements, including non-compliance in the past, could lead to claims for damages from our channel partners, downward contract price adjustments or refund obligations, civil or criminal penalties, termination of contracts or suspension or debarment from government contracting for a period of time with government agencies. Any such damages, penalties, disruption, or limitation in our ability to do business with a government would adversely impact, and could have a material adverse effect on, our business, financial condition, results of operations, reputation and growth prospects.

Our business could be adversely affected if our employees cannot obtain and maintain required security clearances or we cannot maintain a required facility security clearance, or we do not comply with legal and regulatory obligations regarding the safeguarding of classified information.

Our U.S. government contract revenue includes income derived from contracts that require our employees to maintain various levels of security clearances and may require us to maintain a facility security clearance, to comply with Department of Defense (“DoD”) requirements. The DoD has strict security clearance requirements for personnel who perform work in support of classified programs. In general, access to classified information, technology, facilities, or programs are subject to additional contract oversight and potential liability. In the event of a security incident involving classified information, technology, facilities, programs, or personnel holding clearances, we may be subject to legal, financial, operational, and reputational harm. We are limited in our ability to provide specific information about these classified programs, their risks, or any disputes or claims relating to such programs. As a result, investors have less insight into our classified programs than our other businesses and therefore less ability to fully evaluate the risks related to our classified business or our business overall. Obtaining and maintaining security clearances for employees involves a lengthy process, and it is difficult to identify, recruit, and retain employees who already hold security clearances. If our employees are unable to obtain security clearances in a timely manner, or at all, or if our employees who hold security clearances are unable to maintain their clearances or terminate employment with us, then a customer requiring classified work could terminate an existing contract or decide not to renew the contract upon its expiration. To the extent we are not able to obtain or maintain a facility security clearance, we may not be able to bid on or win new classified contracts, and existing contracts requiring a facility security clearance could be terminated.

Failure to comply with anti-bribery, anti-corruption, anti-money laundering laws, and similar laws, could subject us to penalties and other adverse consequences.

We are subject to the FCPA, the U.S. domestic bribery statute contained in 18 U.S.C. § 201, the U.S. Travel Act, the UK Bribery Act, and possibly other anti-bribery and anti-money laundering laws in the United States and in countries outside of the United States in which we conduct our activities. Anti-corruption and anti-bribery laws have been enforced aggressively and are interpreted broadly to generally prohibit companies, their employees, agents, representatives, business partners, and third-party intermediaries from authorizing, offering, or providing, directly or indirectly, improper payments or benefits to recipients in the public or private sector.

We sometimes leverage third parties to sell our products and conduct our business abroad. We or our employees, agents, representatives, business partners or third-party intermediaries may have direct or indirect interactions with officials and employees of government agencies or state-owned or affiliated entities and may be held liable for the corrupt or other illegal activities of these employees, agents, representatives, business partners or third-party intermediaries even if we do not explicitly authorize such activities. We cannot assure you that all of our employees and agents will refrain from taking actions in violation of applicable law for which we may be ultimately held responsible. As we increase our international sales and business, our risks under these laws may increase.

These laws also require that we keep accurate books and records and maintain internal controls and compliance procedures designed to prevent any such actions. While we have policies and procedures to address compliance with such laws, we cannot assure you that none of our employees, agents, representatives, business partners or third-party intermediaries will take actions in violation of our policies and applicable law, for which we may be ultimately held responsible.

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Any allegations or violation of the FCPA or other applicable anti-bribery, anti-corruption laws, and anti-money laundering laws could result in whistleblower complaints, sanctions, settlements, prosecution, enforcement actions, fines, damages, adverse media coverage, investigations, loss of export privileges, severe criminal or civil sanctions, or suspension or debarment from U.S. government contracts, all of which may have an adverse effect on our reputation, business, results of operations, and prospects. Responding to any investigation or action will likely result in a materially significant diversion of management’s attention and resources and significant defense costs and other professional fees.

General Risk Factors

The trading price of our common stock has been volatile and may be volatile in the future.

The trading prices of our common stock and the securities of other technology companies have been and may continue to be highly volatile. Factors affecting the trading price of our common stock include:

•variations in our operating results;

•announcements of technological innovations, new services or service enhancements, strategic alliances or agreements by us or by our competitors;

•the gain or loss of customers;

•recruitment or departure of key personnel;

•changes in the estimates of our future operating results or external guidance on those results or changes in recommendations or business expectations by any securities analysts that elect to follow our common stock;

•mergers and acquisitions by us, by our competitors or by our customers or suppliers;

•market conditions in our industry, the industries of our customers and the economy as a whole, including global trade tariffs, supply chain disruptions, and fluctuations in currency exchange rates, interest rates or inflation rates;

•social, geopolitical, environmental or health factors, including pandemics or widespread health epidemics such as the COVID-19 pandemic; and

•adoption or modification of regulations, policies, procedures or programs applicable to our business.

An economic downturn, negative financial news, continued inflation, high interest rates, declines in income or asset values, market conditions, changes to fuel and other energy costs, and other economic factors, may lead to market volatility and associated uncertainty. In addition, if the market for technology stocks or the broader stock market experiences a loss of investor confidence, the trading price of our common stock could decline for reasons unrelated to our business, financial condition or results of operations. Each of these factors, among others, could harm the value of your investment in our common stock. Some companies that have had volatile market prices for their securities have had securities class action lawsuits filed against them. If a suit were filed against us, regardless of its merits or outcome, it could result in substantial costs and divert management’s attention and resources.

Future sales of our common stock could cause our stock price to fall.

We have sold, and plan in the future to sell, shares of our common stock in underwritten offerings and have established, and may in the future establish, “at-the-market” offering programs pursuant to which we may offer and sell shares of our common stock. Sales of securities have resulted and will continue to result in dilution of our existing stockholders, and such sales could cause our stock price to fall.

In addition, if our existing stockholders sell, or indicate an intent to sell, a large number of shares of our common stock in the public market, it could cause our stock price to fall. We may also issue shares of common stock or securities convertible into our common stock from time to time in connection with financings, acquisitions, investments or otherwise. Any such issuance would result in dilution to our existing stockholders and could cause our stock price to fall.

Anti-takeover provisions in our charter documents and Delaware law could discourage, delay or prevent a change in control of our company and may affect the trading price of our common stock.

We are a Delaware corporation and the anti-takeover provisions of the Delaware General Corporation Law, which apply to us, may discourage, delay or prevent a change in control by prohibiting us from engaging in a business combination with an interested stockholder for a period of three years after the person becomes an interested stockholder, even if a change of control would be beneficial to our existing stockholders. In addition, our

68

amended and restated certificate of incorporation and amended and restated bylaws may discourage, delay or prevent a change in our management or control over us that stockholders may consider favorable. Our amended and restated certificate of incorporation and amended and restated bylaws:

•authorize the issuance of “blank check” convertible preferred stock that could be issued by our board of directors to thwart a takeover attempt;

•establish a classified board of directors, as a result of which the successors to the directors whose terms have expired will be elected to serve from the time of election and qualification until the third annual meeting following their election;

•require that directors only be removed from office for cause;

•provide that vacancies on the board of directors, including newly created directorships, may be filled only by a majority vote of directors then in office rather than by stockholders;

•prevent stockholders from calling special meetings; and

•prohibit stockholder action by written consent, requiring all actions to be taken at a meeting of the stockholders.

Our amended and restated bylaws designate the Court of Chancery of the State of Delaware and the federal district courts of the United States of America as the exclusive forums for substantially all disputes between us and our stockholders, which will restrict our stockholders’ ability to choose the judicial forum for disputes with us or our directors, officers or employees.

Our amended and restated bylaws provide that the Court of Chancery of the State of Delaware or, if such court lacks jurisdiction, any other state or federal court located in the State of Delaware, is the exclusive forum for any derivative action or proceeding brought on our behalf; any action asserting a breach of fiduciary duty; any action arising pursuant to the Delaware General Corporation Law, our amended and restated certificate of incorporation or our amended and restated bylaws; or any action asserting a claim governed by the internal affairs doctrine. However, such exclusive forum provisions would not apply to any such claim as to which such court determines that there is an indispensable party not subject to the jurisdiction of such court (and the indispensable party does not consent to the personal jurisdiction of such court within 10 days following such determination), which is vested in the exclusive jurisdiction of a court or forum other than such court or for which such court does not have subject matter jurisdiction.

These provisions would not apply to suits brought to enforce a duty or liability created by the Exchange Act or any other claim for which the U.S. federal courts have exclusive jurisdiction. Furthermore, Section 22 of the Securities Act creates concurrent jurisdiction for federal and state courts over all such Securities Act actions. Accordingly, both state and federal courts have jurisdiction to entertain such claims. Our stockholders cannot waive compliance with the federal securities laws and the rules and regulations thereunder. To prevent having to litigate claims in multiple jurisdictions and the threat of inconsistent or contrary rulings by different courts, among other considerations, our amended and restated bylaws provide that, unless we consent in writing to the selection of an alternative forum, the federal district courts of the United States of America will be the sole and exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act. While the Delaware courts have determined that such choice of forum provisions are facially valid, a stockholder may nevertheless seek to bring a claim in a venue other than those designated in the exclusive forum provisions. In such instance, we would expect to vigorously assert the validity and enforceability of the exclusive forum provisions of our amended and restated bylaws. This may require significant additional costs associated with resolving such action in other jurisdictions and there can be no assurance that the provisions will be enforced by a court in those other jurisdictions.

These exclusive choice of forum provisions may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our directors, officers, or other employees, which may discourage lawsuits against us and our directors, officers, and other employees. If a court were to find such exclusive-forum provisions to be inapplicable or unenforceable in an action, we may incur further significant additional costs associated with resolving the dispute in other jurisdictions, all of which could harm our business.

Events that are outside our control, such as natural disasters, violence or other catastrophic events, could harm our operations.

Our headquarters and the majority of our infrastructure, including our PIC fabrication manufacturing facility, are located in Northern California, an area that is susceptible to earthquakes, fires, floods and other natural disasters. Further, attacks and violence aimed at Northern California or at the United States energy or

69

telecommunications infrastructure could hinder or delay the development and sale of our products. In the event that an earthquake, targeted attack or other man-made or natural catastrophe were to destroy any part of our or our contract manufacturers’ or suppliers' facilities, destroy or disrupt vital infrastructure systems, or interrupt our operations or supply chain for any extended period of time, our business, financial condition and results of operations would be harmed. For related risks concerning the operations and availability of the storage facilities in which our inventory is held, see also the Risk Factor titled "Our international sales and operations subject us to additional risks that may harm our operating results."

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Item 6.Exhibits

Exhibit No.	Description
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1*	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
104	Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)

*    The certification attached as Exhibit 32.1 that accompanies this Quarterly Report on Form 10-Q is not deemed filed with the SEC and is not to be incorporated by reference into any of our filings under the Securities Act of 1933, as amended, or the Exchange Act, 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.

Infinera Corporation
By:	/s/    NANCY ERBA
	Nancy Erba Chief Financial Officer (Duly Authorized Officer and Principal Financial Officer)
Date:	May 4, 2023

72

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, David W. Heard, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Infinera Corporation;

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

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

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

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

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

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

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

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

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

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

Dated: May 4, 2023

By:	/s/    DAVID W. HEARD
	David W. Heard
	Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Nancy Erba, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Infinera Corporation;

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

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

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

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

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

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

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

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

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

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

Dated: May 4, 2023

By:	/s/    NANCY ERBA
	Nancy Erba
	Chief Financial Officer
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, David W. Heard, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Infinera Corporation for the quarterly period ended April 1, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in such Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Infinera Corporation.

Date:	May 4, 2023	/s/    DAVID W. HEARD
		David W. Heard
		Chief Executive Officer
		(Principal Executive Officer)

I, Nancy Erba, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Infinera Corporation for the quarterly period ended April 1, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in the Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Infinera Corporation.

Date:	May 4, 2023	/s/    NANCY ERBA
		Nancy Erba
		Chief Financial Officer
		(Principal Financial Officer)

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to Infinera Corporation and will be retained by Infinera Corporation and furnished to the U.S. Securities and Exchange Commission or its staff upon request.

This certification “accompanies” the Quarterly Report on Form 10-Q to which it relates, is not deemed filed with the U.S. Securities and Exchange Commission and is not to be incorporated by reference into any filing of Infinera Corporation 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 the Quarterly Report on Form 10-Q), irrespective of any general incorporation language contained in such filing.

XML

Cover Page - shares	3 Months Ended
	Apr. 01, 2023	Apr. 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 01, 2023
Document Transition Report	false
Entity File Number	001-33486
Entity Registrant Name	INFINERA CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0560433
Entity Address, Address Line One	6373 San Ignacio Avenue
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95119
City Area Code	408
Local Phone Number	572-5200
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	INFN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		225,615,552
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001138639
Current Fiscal Year End Date	--12-30

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 163,765	$ 178,657
Short-term restricted cash	3,873	7,274
Accounts receivable, net	334,434	419,735
Inventory	412,940	374,855
Prepaid expenses and other current assets	155,228	152,451
Total current assets	1,070,240	1,132,972
Property, plant and equipment, net	177,007	172,929
Operating lease right-of-use assets	34,434	34,543
Intangible assets, net	40,661	47,787
Goodwill	233,774	232,663
Long-term restricted cash	2,096	3,272
Other long-term assets	40,174	44,972
Total assets	1,598,386	1,669,138
Current liabilities:
Accounts payable	275,177	304,880
Accrued expenses and other current liabilities	120,657	141,450
Accrued compensation and related benefits	59,666	78,849
Short-term debt, net	7,148	510
Accrued warranty	18,296	19,747
Deferred revenue	153,287	158,501
Total current liabilities	634,231	703,937
Long-term debt, net	661,739	667,719
Long-term accrued warranty	17,338	16,874
Long-term deferred revenue	22,263	23,178
Long-term deferred tax liability	2,365	2,348
Long-term operating lease liabilities	44,646	45,862
Other long-term liabilities	29,548	29,573
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value Authorized shares – 25,000 and no shares issued and outstanding	0	0
Common stock, $0.001 par value Authorized shares – 500,000 as of April 1, 2023 and December 31, 2022 Issued and outstanding shares – 224,832 as of April 1, 2023 and 220,408 as of December 31, 2022	225	220
Additional paid-in capital	1,925,060	1,901,491
Accumulated other comprehensive loss	(31,026)	(22,471)
Accumulated deficit	(1,708,003)	(1,699,593)
Total stockholders' equity	186,256	179,647
Total liabilities and stockholders’ equity	$ 1,598,386	$ 1,669,138

XML

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Apr. 01, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	25,000,000	25,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	224,832,000	220,408,000
Common stock, shares outstanding (in shares)	224,832,000	220,408,000

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Revenue:
Total revenue	$ 392,075	$ 338,874
Cost of revenue:
Amortization of intangible assets	3,556	6,231
Restructuring and other related costs	0	150
Total cost of revenue	245,177	227,227
Gross profit	146,898	111,647
Operating expenses:
Research and development	81,042	73,411
Sales and marketing	41,707	35,824
General and administrative	29,235	27,890
Amortization of intangible assets	3,589	3,746
Restructuring and other related costs	790	7,270
Total operating expenses	156,363	148,141
Loss from operations	(9,465)	(36,494)
Other income (expense), net:
Interest income	471	53
Interest expense	(6,800)	(4,992)
Other gain	10,956	6,020
Total other income, net	4,627	1,081
Loss before income taxes	(4,838)	(35,413)
Provision for income taxes	3,572	6,437
Net loss	$ (8,410)	$ (41,850)
Net loss per common share:
Basic (in dollars per share)	$ (0.04)	$ (0.20)
Diluted (in dollars per share)	$ (0.04)	$ (0.20)
Weighted average shares used in computing net loss per common share:
Basic (in shares)	222,393	212,182
Diluted (in shares)	222,393	212,182
Product
Revenue:
Total revenue	$ 314,820	$ 267,453
Cost of revenue:
Cost of revenue	198,674	182,887
Services
Revenue:
Total revenue	77,255	71,421
Cost of revenue:
Cost of revenue	$ 42,947	$ 37,959

XML

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,410)	$ (41,850)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(7,171)	(11,201)
Actuarial loss on pension liabilities	(447)	0
Amortization of actuarial (gain) loss	(937)	87
Net change in accumulated other comprehensive loss	(8,555)	(11,114)
Comprehensive loss	$ (16,965)	$ (52,964)

XML

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 25, 2021			211,381
Beginning balance at Dec. 25, 2021	$ 323,771	$ (122,001)	$ 211	$ 2,026,098	$ (196,493)	$ (4,496)	$ (1,698,042)	$ 74,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ESPP shares issued (in shares)			1,234
ESPP shares issued	8,881		$ 1	8,880
Restricted stock units released (in shares)			675
Restricted stock units released	1		$ 1
Shares withheld for tax obligations (in shares)			(59)
Shares withheld for tax obligations	(524)			(524)
Stock-based compensation	13,041			13,041
Other comprehensive loss	(11,114)					(11,114)
Net loss	(41,850)						(41,850)
Ending balance (in shares) at Mar. 26, 2022			213,231
Ending balance at Mar. 26, 2022	170,205		$ 213	1,851,002		(15,610)	(1,665,400)
Beginning balance (in shares) at Dec. 31, 2022			220,408
Beginning balance at Dec. 31, 2022	179,647		$ 220	1,901,491		(22,471)	(1,699,593)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
ESPP shares issued (in shares)			1,775
ESPP shares issued	8,736		$ 2	8,734
Restricted stock units released (in shares)			2,801
Restricted stock units released	3		$ 3
Shares withheld for tax obligations (in shares)			(152)
Shares withheld for tax obligations	(1,101)			(1,101)
Stock-based compensation	15,936			15,936
Other comprehensive loss	(8,555)					(8,555)
Net loss	(8,410)						(8,410)
Ending balance (in shares) at Apr. 01, 2023			224,832
Ending balance at Apr. 01, 2023	$ 186,256		$ 225	$ 1,925,060		$ (31,026)	$ (1,708,003)

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Apr. 01, 2023	Mar. 26, 2022
Cash Flows from Operating Activities:
Net loss		$ (8,410)	$ (41,850)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization		19,602	21,572
Non-cash restructuring charges and other related costs		136	5,390
Amortization of debt issuance costs		847	1,060
Operating lease expense		2,148	2,702
Stock-based compensation expense		15,651	12,939
Other, net		(1,037)	789
Changes in assets and liabilities:
Accounts receivable		86,239	81,816
Inventory		(38,555)	(1,979)
Prepaid expenses and other current assets		1,004	(23,481)
Accounts payable		(27,969)	(19,829)
Accrued expenses and other current liabilities		(44,749)	(14,351)
Deferred revenue		(6,676)	(8,990)
Net cash (used in) provided by operating activities		(1,769)	15,788
Cash Flows from Investing Activities:
Purchase of property and equipment		(16,809)	(16,059)
Net cash used in investing activities		(16,809)	(16,059)
Cash Flows from Financing Activities:
Repayment of mortgage payable		(127)	(121)
Payment of debt issuance cost		(154)	0
Payment of term license obligation		(2,323)	(1,418)
Principal payments on finance lease obligations		(227)	(400)
Proceeds from issuance of common stock		8,738	8,875
Tax withholding paid on behalf of employees for net share settlement		(1,100)	(524)
Net cash provided by financing activities		4,807	6,412
Effect of exchange rate changes on cash		(5,698)	(4,634)
Net change in cash, cash equivalents and restricted cash		(19,469)	1,507
Cash, cash equivalents and restricted cash at beginning of period		189,203	202,521
Cash, cash equivalents, and restricted cash at end of period	[1]	169,734	204,028
Supplemental disclosures of cash flow information:
Cash paid for income taxes, net		1,963	1,967
Cash paid for interest		10,931	7,137
Supplemental schedule of non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued liabilities		10,229	1,477
Transfer of inventory to fixed assets		1,099	2,037
Unpaid term licenses (included in accounts payable, accrued liabilities and other long-term liabilities)		$ 7,134	$ 9,290

[1] Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets: April 1,
2023March 26,
2022Cash and cash equivalents$163,765 $191,937 Short-term restricted cash3,873 6,528 Long-term restricted cash2,096 5,563 Total cash, cash equivalents and restricted cash$169,734 $204,028 

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Apr. 01, 2023		Dec. 31, 2022	Mar. 26, 2022		Dec. 25, 2021
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 163,765		$ 178,657	$ 191,937
Short-term restricted cash	3,873		7,274	6,528
Long-term restricted cash	2,096		3,272	5,563
Total cash, cash equivalents and restricted cash	$ 169,734	[1]	$ 189,203	$ 204,028	[1]	$ 202,521

[1] Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets: April 1,
2023March 26,
2022Cash and cash equivalents$163,765 $191,937 Short-term restricted cash3,873 6,528 Long-term restricted cash2,096 5,563 Total cash, cash equivalents and restricted cash$169,734 $204,028 

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Basis of Presentation and Significant Accounting Policies

3 Months Ended

Apr. 01, 2023

Accounting Policies [Abstract]

Basis of Presentation and Significant Accounting Policies

Basis of Presentation and Significant Accounting Policies

Infinera Corporation (the “Company”) prepared its interim condensed consolidated financial statements that accompany these notes in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”), consistent in all material respects with those applied in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

The Company has made certain estimates, assumptions and judgments that can affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Estimates, assumptions and judgments made by management include inventory valuation, revenue recognition, accounting for income taxes, stock-based compensation, employee benefit and pension plans, manufacturing partner and supplier liabilities, allowances for sales returns, allowances for credit losses, useful life of intangibles and property, plant and equipment, impairment loss related to lease abandonment, accrued warranty, operating and finance lease liabilities, restructuring and other related costs and loss contingencies. Management believes that the estimates and judgments upon which they rely are reasonable based upon information available to them at the time that these estimates and judgments are made. The Company expects uncertainties around its key accounting estimates to continue to evolve depending on the duration and degree of impact associated with inflation, disruption in the global economy and financial markets and the on-going effects of the coronavirus (“COVID-19”) pandemic. These estimates may change as new events occur and additional information emerges, and such changes are recognized or disclosed in the Company's condensed consolidated financial statements.

The interim financial information is unaudited, but reflects all adjustments that are, in management’s opinion, necessary to provide a fair presentation of results for the interim periods presented. All adjustments are of a normal recurring nature. The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All inter-company balances and transactions have been eliminated.

This interim information should be read in conjunction with the consolidated financial statements in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

For the three-month periods ended April 1, 2023 and March 26, 2022, no customer accounted for 10% or more of the Company's total revenue.

There have been no material changes in the Company’s significant accounting policies for the three-months ended April 1, 2023 compared to those disclosed in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

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Leases

3 Months Ended

Apr. 01, 2023

Leases [Abstract]

Leases

Leases

The Company has operating leases for real estate (facilities) and automobiles. For the three-months ended April 1, 2023 and March 26, 2022, operating lease expense was $3.8 million and $9.3 million, respectively. Included in operating lease expense were rent expense and impairment charges due to restructuring resulting in abandonment of certain lease facilities, amounting to $0.8 million and $5.6 million, for the three-months ended April 1, 2023 and March 26, 2022, respectively.

Variable lease cost, short-term lease cost and sublease income were immaterial during the three-months ended April 1, 2023 and March 26, 2022.

The following table presents current and long-term portion of operating lease liabilities as classified in the condensed consolidated balance sheets (in thousands):

	April 1, 2023		December 31, 2022
Accrued expenses and other current liabilities	$	11,582	$	10,948
Other long-term liabilities	44,646		45,862
Total operating lease liability	$	56,228	$	56,810

The Company also has finance leases. The lease term for these arrangements range from three to five years with option to purchase, or ownership transferring at the end of the term. As of April 1, 2023 and December 31, 2022, finance leases included in property, plant, and equipment, net in the condensed consolidated balance sheets were $2.0 million and $1.9 million, respectively. Finance lease expense includes amortization of the right-of-use assets and interest expense. Total finance lease expense during the three-month periods ended April 1, 2023 and March 26, 2022 was not material.

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table presents supplemental information for the Company's non-cancelable leases for the three-months ended April 1, 2023 (in thousands, except for weighted average and percentage data):

	Operating Lease			Finance Lease
Weighted average remaining lease term	5.16 years			1.32 years
Weighted average discount rate	9.29		%	7.82		%
Cash paid for amounts included in the measurement of lease liabilities	$	4,045		$	227
Leased assets obtained in exchange for new lease liabilities	$	1,846		$	208

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Revenue Recognition

3 Months Ended

Apr. 01, 2023

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

Disaggregation of Revenue

The following table presents the Company's revenue disaggregated by geography, based on the shipping address of the customer (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
United States	$	237,035	$	170,185
Other Americas	20,555		20,911
Europe, Middle East and Africa	93,250		108,611
Asia Pacific	41,235		39,167
Total revenue	$	392,075	$	338,874

The Company sells its products directly to customers who are predominantly service providers and to channel partners that sell on its behalf.

The following table presents the Company's revenue disaggregated by sales channel (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Direct	$	262,862	$	260,892
Indirect	129,213		77,982
Total revenue	$	392,075	$	338,874

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers (in thousands):

	April 1, 2023		December 31, 2022
Assets (Liabilities)
Accounts receivable, net	$	334,434	$	419,735
Contract assets	$	65,174	$	60,172
Deferred revenue	$	(175,550)	$	(181,679)

Revenue recognized for the three-months ended April 1, 2023 that was included in the deferred revenue balance at the beginning of the reporting period was $50.9 million. Revenue recognized for the three-months ended March 26, 2022 that was included in the deferred revenue balance at the beginning of the reporting period was $44.9 million. Changes in the contract asset and liability balances during the three-month periods ended April 1, 2023 and March 26, 2022 were not materially impacted by other factors.

Transaction Price Allocated to the Remaining Performance Obligation

The Company’s remaining performance obligations represent the transaction price allocated to performance obligations that are unsatisfied or partially satisfied, consisting of deferred revenue and backlog. The Company’s backlog represents purchase orders received from customers for future product shipments and services. The Company’s backlog is subject to future events that could cause the amount or timing of the related revenue to change, and, in certain cases, may be canceled without penalty. Orders in backlog may be fulfilled several quarters following receipt or may relate to multi-year support service obligations.

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially satisfied) pursuant to contracts that are not subject to cancellation without penalty at the end of the reporting period (in thousands):

	Remainder of 2023		2024		2025		2026		2027		Thereafter		Total
Revenue expected to be recognized in the future as of April 1, 2023	$	594,213	$	238,535	$	47,156	$	10,664	$	5,731	$	6,427	$	902,726

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Fair Value Measurements

3 Months Ended

Apr. 01, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Disclosure of Fair Values

Financial instruments that are not re-measured at fair value include accounts receivable, accounts payable, accrued liabilities, and debt. The carrying values of these financial instruments other than the Company's 2024 Notes, 2027 Notes and 2028 Notes (as defined below and collectively referred to as "convertible senior notes") approximate their fair values. The fair value of convertible senior notes was determined based on the quoted bid price of the convertible senior notes in an over-the-counter market on March 31, 2023 (the last trading day of the quarter).

The following table presents the estimated fair values of the convertible senior notes (in thousands): 

	As of April 1, 2023					As of December 31, 2022
	Fair Value Measured Using					Fair Value Measured Using
	Level 1		Level 2	Total		Level 1		Level 2		Total
Convertible senior notes	$	—	$855,088	$	855,088	$	—	$	785,364	$	785,364

Cash equivalents are measured and reported at fair value on a recurring basis. The following table presents the fair value of these financial assets and their levels within the fair value hierarchy (in thousands):

	As of April 1, 2023						As of December 31, 2022
	Fair Value Measured Using						Fair Value Measured Using
	Level 1		Level 2		Total		Level 1		Level 2		Total
Money market funds	$	85,000	$	—	$	85,000	$	95,000	$	—	$	95,000

During the three-months ended April 1, 2023, there were no transfers of assets or liabilities between Level 1 and Level 2 of the fair value hierarchy. As of each of April 1, 2023 and December 31, 2022, none of the Company’s existing assets or liabilities were classified as Level 3.

The Company measures goodwill and intangible assets at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. The Company performed an analysis of impairment indicators of these assets and noted no adverse impact to their fair values as of April 1, 2023.    

Facilities-related Charges

The Company classifies certain facilities-related charges within Level 3 of the fair value hierarchy and applies fair value accounting on a nonrecurring basis when impairment indicators exist or upon the existence of observable fair values.

In connection with its restructuring plans (as discussed in Note 7, “Restructuring and Other Related Costs” to the notes to condensed consolidated financial statements), the Company incurred facilities-related charges of $0.8 million and $5.6 million for the three-months ended April 1, 2023 and March 26, 2022, respectively. These charges primarily consisted of impairment charges incurred for operating lease right-of-use assets and were calculated at fair value based on estimated future sublease rental receipts that the Company could reasonably obtain over the remaining lease term at the discount rate. Facilities-related charges are classified as Level 3 measurement due to the significance of these unobservable inputs.

Cash and Cash Equivalents

As of April 1, 2023, the Company had $169.7 million of cash, cash equivalents and restricted cash, including $65.1 million of cash held by its foreign subsidiaries.

As of December 31, 2022, the Company had $189.2 million of cash, cash equivalents and restricted cash, including $65.9 million of cash held by its foreign subsidiaries.

The Company's cash held by its foreign subsidiaries is used for operating and investing activities in those locations, and the Company does not currently have the need or the intent to repatriate those funds to the United States.

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Goodwill and Intangible Assets

3 Months Ended

Apr. 01, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

Goodwill

Goodwill is recorded when the purchase price of an acquisition exceeds the fair value of the net tangible and identified intangible assets acquired.

The following table presents details of the Company’s goodwill during the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	232,663
Foreign currency translation adjustments	1,111
Balance as of April 1, 2023	$	233,774

The gross carrying amount of goodwill may change due to the effects of foreign currency fluctuations as a portion of these assets are denominated in foreign currency. To date, the Company has not recognized any impairment losses on goodwill.

Intangible Assets

The following tables present details of the Company’s intangible assets as of April 1, 2023 and December 31, 2022 (in thousands, except for weighted average data):

	April 1, 2023
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	112,550	$	(78,954)	$	33,596	3.3
Developed technology	153,312		(146,247)		7,065		0.5
Total intangible assets with finite lives	$	265,862	$	(225,201)	$	40,661

	December 31, 2022
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	151,461	$	(114,294)	$	37,167	3.5
Developed technology	170,467		(159,847)		10,620		0.7
Total intangible assets with finite lives	$	321,928	$	(274,141)	$	47,787

The gross carrying amount of intangible assets and the related amortization expense of intangible assets may change due to the effects of foreign currency fluctuations as a portion of these assets are denominated in foreign currency. Amortization expenses were $7.1 million and $10.0 million for the three-month periods ended April 1, 2023 and March 26, 2022, respectively.

Intangible assets are carried at cost less accumulated amortization and impairment, if any. Amortization expenses are recorded to the appropriate cost and expense categories.

The following table summarizes the Company’s estimated future amortization expense of intangible assets with finite lives as of April 1, 2023 (in thousands):

			Fiscal Years
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Total future amortization expense	$	40,661	$	15,843	$	9,025	$	9,025	$	6,768	$	—	$	—

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Balance Sheet Details

3 Months Ended

Apr. 01, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Balance Sheet Details

Balance Sheet Details

Restricted Cash

The Company’s restricted cash balance is held in deposit accounts at various banks globally. These amounts primarily collateralize the Company’s issuances of standby letters of credit and bank guarantees.

Allowance for Credit Losses

The following table provides a rollforward of the allowance for credit losses for accounts receivable for the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	1,422
Additions(1)	266
Write offs(2)	(356)
Recoveries during the period	(322)
Other(3)	2
Balance as of April 1, 2023	$	1,012

(1)The new additions during the three-months ended April 1, 2023 are primarily due to specific reserves.

(2)The write offs during the three-months ended April 1, 2023 are primarily amounts fully reserved previously.

(3)Primarily represents foreign currency translation adjustments.

Accounts Receivable Factoring

The Company sells certain designated trade account receivables based on factoring arrangements with well-established factoring companies. Pursuant to the terms of the arrangements, the Company accounts for these transactions in accordance with ASC Topic 860, "Transfers and Servicing". The Company's factor purchases trade accounts receivables on a non-recourse basis and without any further obligations. Trade accounts receivables balances sold are removed from the condensed consolidated balance sheets and cash received is reflected as cash provided by operating activities in the condensed consolidated statements of cash flows. The difference between the fair value of the Company's trade receivables and the proceeds received is recorded as interest expense in the Company's condensed consolidated statements of operations. For the three-months ended April 1, 2023 and March 26, 2022, the Company's recognized factoring related interest expense was approximately $0.3 million and $0.1 million, respectively. For the three-months ended April 1, 2023 and March 26, 2022, the Company's gross amount of trade accounts receivables sold were approximately $21.2 million and $24.0 million, respectively.

Selected Balance Sheet Items

The following table provides details of selected balance sheet items (in thousands):

	April 1, 2023		December 31, 2022
Inventory
Raw materials	$	67,601	$	48,688
Work in process	71,750		66,591
Finished goods	273,589		259,576
Total inventory	$	412,940	$	374,855
Property, plant and equipment, net
Computer hardware	$	47,514	$	46,454
Computer software(1)	58,867		62,102
Laboratory and manufacturing equipment	306,600		297,261
Land and building	12,372		12,369
Furniture and fixtures	2,862		2,828
Leasehold and building improvements	50,042		50,360
Construction in progress	48,702		42,418
Subtotal	526,959		513,792
Less accumulated depreciation and amortization(2)	(349,952)		(340,863)
Total property, plant and equipment, net	$	177,007	$	172,929
Accrued expenses and other current liabilities
Loss contingency related to non-cancelable purchase commitments	$	22,881	$	28,796
Taxes payable	41,676		42,757
Short-term operating and finance lease liability	12,364		11,701
Restructuring accrual	397		941
Other accrued expenses and other current liabilities	43,339		57,255
Total accrued expenses	$	120,657	$	141,450

(1)Included in computer software at April 1, 2023 and December 31, 2022 were $30.2 million and $29.3 million, respectively, related to enterprise resource planning (“ERP”) systems that the Company implemented. The unamortized ERP costs at April 1, 2023 and December 31, 2022 were $8.9 million and $9.0 million, respectively. Also included in computer software at April 1, 2023 and December 31, 2022 was $19.3 million and $24.2 million, respectively, related to term licenses. The unamortized term license costs at April 1, 2023 and December 31, 2022 was $7.1 million and $9.1 million, respectively.

(2)Depreciation expense was $12.5 million and $11.6 million (which includes depreciation of capitalized ERP cost of $0.9 million and $0.8 million, respectively) for the three-months ended April 1, 2023 and March 26, 2022, respectively. Also included in depreciation expense for three-months ended April 1, 2023 and March 26, 2022 was $2.2 million and $1.7 million, respectively, related to term licenses.

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Restructuring and Other Related Costs

3 Months Ended

Apr. 01, 2023

Restructuring and Related Activities [Abstract]

Restructuring and Other Related Costs

Restructuring and Other Related Costs

In 2021, the Company announced a plan to restructure certain international research and development operations (the "2021 Restructuring Plan"). The 2021 Restructuring Plan is substantially completed with the associated payments made in 2022. Additional restructuring activities may occur in the future in connection with the Company’s ongoing transformation initiatives.

In the three-month periods ended April 1, 2023 and March 26, 2022, the Company incurred lease-related impairment charges from consolidation of various sites that resulted in abandonment of related leased facilities. This was a result of restructuring initiatives undertaken in previous years.

The following table presents restructuring and other related costs included in cost of revenue and operating expenses in the accompanying condensed consolidated statements of operations under the restructuring plans (in thousands):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Cost of Revenue		Operating Expenses		Cost of Revenue		Operating Expenses
Severance and other related expenses	$	—	$	—	$	140	$	1,461
Lease related impairment charges	—		786		—		5,641
Others	—		4		10		168
Total	$	—	$	790	$	150	$	7,270

Restructuring liabilities are reported within accrued expenses and other long-term liabilities in the accompanying condensed consolidated balance sheets (in thousands):

	Severance and other related expenses		Lease related impairment charges		Others		Total
Balance at December 31, 2022	$	792	$	—	$	149	$	941
Charges	—		786		4		790
Cash Payments	(562)		(633)		(4)		(1,199)
Non-Cash Settlements and Other	15		(153)		3		(135)
Balance at April 1, 2023	$	245	$	—	$	152	$	397

As of April 1, 2023, the Company's restructuring liability was primarily comprised of $0.3 million related to the 2021 Restructuring Plan and $0.1 million related to assumed restructuring liabilities associated with Coriant's previous restructuring and reorganization plans, which was substantially completed in previous years. The liability related to the 2021 Restructuring Plan is expected to be paid by the end of 2023.

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Accumulated Other Comprehensive Loss

3 Months Ended

Apr. 01, 2023

Equity [Abstract]

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss includes certain changes in equity that are excluded from net loss. The following table sets forth the changes in accumulated other comprehensive loss by component for the three-months ended April 1, 2023 (in thousands): 

	Foreign Currency Translation		Actuarial Gain (Loss) on Pension		Total
Balance at December 31, 2022	$	(49,632)	$	27,161	$	(22,471)
Other comprehensive loss before reclassifications	(7,171)		(447)		(7,618)
Amounts reclassified from accumulated other comprehensive loss	—		(937)		(937)
Net current-period other comprehensive loss	(7,171)		(1,384)		(8,555)
Balance at April 1, 2023	$	(56,803)	$	25,777	$	(31,026)

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Basic and Diluted Net Loss Per Common Share

3 Months Ended

Apr. 01, 2023

Earnings Per Share [Abstract]

Basic and Diluted Net Loss Per Common Share

Basic and Diluted Net Loss Per Common Share

Basic net loss per common share is computed by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted net loss per common share is computed using net loss and the weighted average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Potentially dilutive common shares include the assumed release of outstanding restricted stock units (“RSUs”) and performance shares (referred to herein as the “PSUs”), assumed issuance of common stock under the Company’s 2007 Employee Stock Purchase Plan (the “ESPP”) using the treasury stock method, and shares of common stock issuable upon conversion of convertible senior notes. The Company includes the common shares underlying PSUs in the calculation of diluted net income per common share only when they become contingently issuable. As the Company incurred net losses during the three-month periods ended April 1, 2023 and March 26, 2022, all potentially issuable shares of common stock were determined to be anti-dilutive.

The following table sets forth the computation of net loss per common share – basic and diluted (in thousands, except per share amounts):

	Three Months Ended
	April 1, 2023		March 26, 2022
Net loss	$	(8,410)	$	(41,850)
Weighted average common shares outstanding - basic and diluted	222,393		212,182
Net loss per common share - basic and diluted	$	(0.04)	$	(0.20)

The following sets forth the potentially dilutive shares excluded from the computation of the diluted net loss per share because their effect was anti-dilutive (in thousands):

	Three Months Ended
	April 1, 2023	March 26, 2022
Convertible senior notes	40,100	69,930
Restricted stock units	15,582	17,887
Performance stock units	3,685	2,824
Employee stock purchase plan shares	—	1,095
Total	59,367	91,736

The Company uses the if-converted method for calculating any potential dilutive effect of the convertible senior notes. The Company calculates diluted earnings per share assuming that all of the convertible senior notes permitted to be share settled were converted solely into shares of common stock at the beginning of the reporting period. The potential impact upon the conversion of the convertible senior notes was excluded from the calculation of diluted net loss per share for the three-month periods ended April 1, 2023 and March 26, 2022, because the effect would have been anti-dilutive.

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Debt

3 Months Ended

Apr. 01, 2023

Debt Disclosure [Abstract]

Debt

Debt

The following is a summary of the Company's debt as of April 1, 2023 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.9	$	102.7	September 2024
2027 Notes	—		196.1		200.0		March 2027
2028 Notes	—		363.7		373.8		August 2028
Mortgage	7.1		—		7.1		March 2024
Total Debt	$	7.1	$	661.7	$	683.6

The following is a summary of the Company's debt as of December 31, 2022 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.7	$	102.7	September 2024
2027 Notes	—		195.9		200.0		March 2027
2028 Notes	—		363.3		373.8		August 2028
Mortgage	0.5		6.8		7.3		March 2024
Total Debt	$	0.5	$	667.7	$	683.8

Convertible Senior Notes

In September 2018, the Company issued $402.5 million aggregate principal amount of 2.125% Convertible Senior Notes due 2024 (the "2024 Notes"). In March 2020, the Company issued $200.0 million aggregate principal amount of 2.5% Convertible Senior Notes due 2027 (the “2027 Notes"). In August 2022, the Company issued $373.8 million aggregate principal amount of 3.75% Convertible Senior Notes due 2028 (the "2028 Notes," and together with the 2024 Notes and 2027 Notes, the “convertible senior notes”). The 2024 Notes bear interest at a fixed rate of 2.125% per year, payable semi-annually in arrears on March 1 and September 1 of each year, beginning on March 1, 2019. The 2027 Notes bear interest at a fixed rate of 2.5% per year, payable semi-annually in arrears on March 1 and September 1 of each year, beginning on September 1, 2020. The 2028 Notes bear interest at a fixed rate of 3.75% per year, payable semi-annually in arrears on February 1 and August 1 of each year, beginning on February 1, 2023. No sinking fund is provided for the convertible senior notes.

There have been no changes to the initial conversion price of the convertible senior notes since issuance and during the three-months ended April 1, 2023. None of the conditions allowing holders of the convertible senior notes to convert early were met. The convertible senior notes were therefore not convertible during the three-months ended April 1, 2023.

Interest Expense

The following table presents the interest expense related to the contractual interest coupon and the amortization of debt issuance costs on the Company's convertible senior notes (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Contractual interest expense	$	5,299	$	3,388
Amortization of debt issuance costs	785		767
Total interest expense	$	6,084	$	4,155

The issuance cost related to the 2024 Notes, the 2027 Notes and the 2028 Notes are being amortized to interest expense over the respective contractual term, at effective interest rates of 2.7%, 3.0% and 4.3%, respectively. Unamortized debt issuance costs will be amortized over the remaining life of the 2024 Notes, the 2027 Notes and the 2028 Notes which is approximately 17 months, 47 months, and 64 months, respectively.

The net carrying amount of the convertible senior notes as of April 1, 2023 and as of December 31, 2022 was as follows (in thousands):

	2024 Notes				2027 Notes				2028 Notes
	April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022
Principal	$	102,652	$	102,652	$	200,000	$	200,000	$	373,650	$	373,750
Unamortized issuance costs	(789)		(926)		(3,887)		(4,121)		(9,987)		(10,401)
Net carrying amount	$	101,863	$	101,726	$	196,113	$	195,879	$	363,663	$	363,349

Asset-based revolving credit facility

On June 24, 2022, the Company entered into a Loan, Guaranty and Security Agreement (the “Loan Agreement”) with the lenders party thereto, and Bank of America, N.A., as agent. The Loan Agreement provides for a senior secured asset-based revolving credit facility of up to $200 million (the "Credit Facility"), which the Company may draw upon from time to time. The Company may increase the total commitments under the revolving credit facility by up to an additional $100 million, subject to certain conditions. In addition, the Loan Agreement provides for a $50 million letter of credit subfacility and a $20 million swingline loan facility.

The proceeds of the loans under the Loan Agreement may be used to pay the fees, costs, and expenses incurred in connection with the Loan Agreement, repay existing debt and for working capital and general corporate purposes, including to fund growth. The Credit Facility has a stated maturity date of June 24, 2027. Availability under the Credit Facility will be based upon periodic borrowing base certifications valuing certain inventory and accounts receivable, as reduced by certain reserves. The Credit Facility is secured by a first-priority security interest (subject to certain exceptions) in inventory, certain related assets, specified deposit accounts, and certain other accounts.

Outstanding borrowings accrue interest at floating rates plus an applicable margin of 1.25% to 1.75% for Term Secured Overnight Financing Rate ("SOFR") rate loans and 0.25% to 0.75% for base rate loans. The unused line fee rate payable on the unused portion of the Credit Facility is equal to 0.25% per annum based on utilization of the Credit Facility.

The Loan Agreement contains customary affirmative covenants, such as financial statement reporting requirements and delivery of borrowing base certificates. The Loan Agreement also contains customary covenants that limit the ability of the Company to, among other things, incur debt, create liens and encumbrances, engage in certain fundamental changes, dispose of assets, prepay certain indebtedness, make restricted payments, make investments, and engage in transactions with affiliates. The Loan Agreement also contains a financial covenant that requires the Company to maintain a minimum fixed charge coverage ratio. As of April 1, 2023, the Company was in compliance with all covenants under the Loan Agreement.

In connection with the Credit Facility, the Company incurred lender and other third-party costs of approximately $1.2 million, which are recorded as a deferred asset and will be amortized to interest expense using a straight-line method over the term of the Credit Facility.

As of April 1, 2023, the Company had availability of $133.4 million under the Credit Facility. As of April 1, 2023, the Loan Agreement included a $50.0 million letter of credit subfacility and $19.1 million letters of credit issued and outstanding.

Mortgage Payable

In March 2019, the Company mortgaged a property it owns. The Company received proceeds of $8.7 million in connection with the loan. The loan carries a fixed interest rate of 5.25% and is repayable in 59 equal monthly installments of principal balance plus accrued unpaid interest due five years from the date of the loan.

On September 24, 2021, the loan was amended to reduce the interest rate from 5.25% to 3.80% for the remaining 31 equal monthly installments of approximately $0.1 million each.

As of April 1, 2023, $7.1 million of the loan remained outstanding and is included in short-term debt, net in the condensed consolidated balance sheets.

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Commitments and Contingencies

3 Months Ended

Apr. 01, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Legal Matters

NextGen Innovations, LLC

On August 9, 2022, NextGen Innovations, LLC ("NextGen") filed a complaint against the Company in the United States District Court for the Eastern District of Texas. The complaint asserts that through certain products the Company infringed on U.S. Patent Nos. 9,887,795, 10,263,723, and 10,771,181. The complaint alleges that NextGen is entitled to unspecified damages, costs, fees, expenses, interest, and injunctive relief. The Company is currently unable to predict the outcome of this litigation and therefore cannot reasonably estimate the possible loss or range of loss, if any, arising from this matter.

In addition to the matter described above, the Company is subject to various legal proceedings, claims and litigation arising in the ordinary course of business. While the outcome of these matters is currently not determinable, the Company does not expect that the ultimate costs to resolve these matters will have a material effect on its condensed consolidated financial position, results of operations or cash flows.

Loss Contingencies

The Company is subject to the possibility of various losses arising in the ordinary course of business. These may relate to disputes, litigation and other legal actions. In the preparation of its quarterly and annual financial statements, the Company considers the likelihood of loss or the incurrence of a liability, including whether it is probable, reasonably possible or remote that a liability has been incurred, as well as the Company’s ability to reasonably estimate the amount of loss, in determining loss contingencies. In accordance with U.S. GAAP, an estimated loss contingency is accrued when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company regularly evaluates current information to determine whether any accruals should be adjusted and whether new accruals are required. As of each of April 1, 2023 and December 31, 2022, the Company has accrued the estimated liabilities associated with certain loss contingencies.

Indemnification Obligations

From time to time, the Company enters into certain types of contracts that contingently require it to indemnify parties against third-party claims. The terms of such indemnification obligations vary. These contracts may relate to: (i) certain real estate leases under which the Company may be required to indemnify property owners for environmental and other liabilities, and other claims arising from the Company’s use of the applicable premises; and (ii) certain agreements with the Company’s officers, directors and certain key employees, under which the Company may be required to indemnify such persons for liabilities.

In addition, the Company has agreed to indemnify certain customers for claims made against the Company’s products, where such claims allege infringement of third-party intellectual property rights, including, but not limited to, patents, registered trademarks, and/or copyrights. Under the aforementioned intellectual property indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim as well as the customer’s attorneys’ fees and costs. These indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. In certain cases, there are limits on and exceptions to the Company’s potential liability for indemnification. The Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant.

As permitted under Delaware law and the Company’s charter and bylaws, the Company has agreements whereby it indemnifies certain of its officers and each of its directors. The term of the indemnification period is for the officer’s or director’s lifetime for certain events or occurrences while the officer or director is, or was, serving at the Company’s request in such capacity. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements could be significant; however, the Company has a director and officer insurance policy that may reduce its exposure and enable it to recover all or a portion of any future amounts paid. As a result of its insurance policy coverage, the Company believes the estimated fair value of these indemnification agreements is minimal.

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Stockholders' Equity

3 Months Ended

Apr. 01, 2023

Share-Based Payment Arrangement [Abstract]

Stockholders' Equity

Stockholders’ Equity

2016 Equity Incentive Plan and Employee Stock Purchase Plan

In February of 2007, the Company's board of directors adopted the ESPP and the Company's stockholders approved the ESPP in May of 2007. The ESPP was last amended by the Company's stockholders in May 2019 to increase the shares authorized under the ESPP to a total of approximately 31.6 million shares of common stock. The ESPP has a 20-year term. Eligible employees may purchase the Company’s common stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or the end of six-month offering periods. An employee’s payroll deductions under the ESPP are limited to a maximum of 15% of the employee’s compensation and an employee may not purchase more than 3,000 shares per purchase period.

In February 2016, the Company's board of directors adopted the 2016 Equity Incentive Plan (the "2016 Plan") and the Company's stockholders approved the 2016 Plan in May 2016. In May 2017, May 2018, May 2019, May 2020, May 2021 and May 2022, the Company's stockholders approved amendments to the 2016 Plan to increase the number of shares authorized for issuance under the 2016 Plan by 6.4 million shares, 1.5 million shares, 7.3 million shares, 8.1 million shares, 4.4 million shares and 8.5 million shares, respectively. As of April 1, 2023, the Company reserved a total of 43.7 million shares of common stock for the award of stock options, RSUs and PSUs to employees, non-employees, consultants and members of the Company's board of directors pursuant to the 2016 Plan, plus any shares subject to awards granted under the 2007 Equity Incentive Plan (the "2007 Plan") that, after the effective date of the 2016 Plan, expire, are forfeited or otherwise terminate without having been exercised in full to the extent such awards were exercisable, and shares issued pursuant to awards granted under the 2007 Plan that, after the effective date of the 2016 Plan, are forfeited to or repurchased by the Company due to failure to vest. The 2016 Plan has a maximum term of 10 years from the date of adoption, or it can be earlier terminated by the Company's board of directors. The 2007 Plan was canceled and there are no outstanding grants under the 2007 Plan.

Stock-based Compensation Plans

As described above, the Company has stock-based compensation plans pursuant to which the Company has granted RSUs and PSUs, as well as an ESPP for all eligible employees.

(in thousands except weighted average data)	Number of Restricted Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	12,588	$	8.13	$	84,847
RSUs granted	5,931	$	7.34
RSUs released	(2,801)	$	8.45	$	20,343
RSUs canceled	(137)	$	8.25
Outstanding at April 1, 2023	15,581	$	7.77	120,914

(in thousands except weighted average data)	Number of Performance Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	2,559	$	7.40	$	17,251
PSUs granted	1,835	$	7.26
PSUs canceled	(708)	$	5.89
Outstanding at April 1, 2023	3,686	$	7.62	$	28,603

The aggregate intrinsic value of unreleased RSUs and unreleased PSUs is calculated using the closing price of the Company's common stock of $7.76 at March 31, 2023 (the last trading day of the quarter). The aggregate intrinsic value of RSUs and PSUs released is calculated using the fair market value of the common stock at the date of release.

The following table presents total stock-based compensation cost for instruments granted but not yet fully amortized, of the Company’s equity compensation plans as of April 1, 2023. These costs are expected to be amortized on a straight-line basis over the following weighted-average periods (in thousands, except for weighted average period data):

	Unrecognized Compensation Expense, Net		Weighted Average Period (in Years)
RSUs	$	105,199	2.33
PSUs	$	26,268	2.11

Employee Stock Purchase Plan

The fair value of the ESPP shares was estimated at the date of grant using the following assumptions:

	Three Months Ended
	April 1, 2023	March 26, 2022
Volatility	60%	39%
Risk-free interest rate	4.98%	0.67%
Expected life	0.5 years	0.5 years
Estimated fair value	$2.37	$2.21

Stock-based compensation expense related to ESPP for the three-months ended April 1, 2023 was approximately $1.6 million, and for three-months ended March 26, 2022 was approximately $1.3 million.

Restricted Stock Units

Pursuant to the 2016 Plan, the Company has granted RSUs to employees and non-employee members of the Company's board of directors. All RSUs awarded are subject to each individual's continued service to the Company through each applicable vesting date. The Company accounted for the fair value of the RSUs using the closing market price of the Company’s common stock on the date of grant. Amortization of stock-based compensation related to RSUs for the three-months ended April 1, 2023 was approximately $13.0 million, and for the three-months ended March 26, 2022 was approximately $10.9 million.

Performance Stock Units

Pursuant to the 2016 Plan, the Company has granted PSUs to certain of the Company’s executive officers, senior management and certain employees. All PSUs awarded are subject to each individual's continued service to the Company through each applicable vesting date and if the performance metrics are not met within the time limits specified in the award agreements, the PSUs will be canceled.

The following table summarizes by grant year, the Company’s PSU activity for the three-months ended April 1, 2023 (in thousands):

	Total Number of Performance Stock Units	2020	2021	2022	2023
Outstanding at December 31, 2022	2,559	1,058	602	899	—
PSUs granted	1,835	—	—	—	1,835
PSUs canceled	(708)	(708)	—	—	—
Outstanding at April 1, 2023	3,686	350	602	899	1,835

Stock-based compensation expense related to PSUs for the three-month periods ended April 1, 2023 and March 26, 2022 was approximately $1.4 million and $0.9 million, respectively.

Stock-Based Compensation

The following tables summarize the effects of stock-based compensation on the Company’s condensed consolidated balance sheets and statements of operations for the periods presented (in thousands):

	April 1, 2023		December 31, 2022
Stock-based compensation effects in inventory	$	4,267	$	3,979

	Three Months Ended
	April 1, 2023		March 26, 2022
Income tax benefit associated with stock-based compensation	$	1,984	$	2,226
Stock-based compensation effects in net loss before income taxes
Cost of revenue	$	2,276	$	1,889
Research and development	5,623		4,841
Sales and marketing	3,594		2,767
General and administration	4,158		3,442
Total stock-based compensation expense	$	15,651	$	12,939

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Income Taxes

3 Months Ended

Apr. 01, 2023

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

Income taxes for the three-months ended April 1, 2023 represented a tax expense of $3.6 million on pre-tax losses of $4.8 million. This compared to a tax expense of $6.4 million on pre-tax losses of $35.4 million for the three-months ended March 26, 2022. Provision for income taxes decreased by approximately $2.8 million for the three-months ended April 1, 2023, compared to the corresponding period in 2022 as a result of a decrease in income taxes and withholding taxes in foreign jurisdictions, primarily driven by elimination of the withholding tax in Germany due to an internal restructuring of the Company's supply chain and customer-facing entities.

The Company must assess the likelihood that some portion or all of its deferred tax assets will be recovered from future taxable income within the respective jurisdictions. In the past, the Company established a valuation allowance against its deferred tax assets as it determined that its ability to recover the value of these assets did not meet the “more-likely-than-not” standard. 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. Management judgment is required on an on-going basis to determine whether it needs to maintain the valuation allowance recorded against its net deferred tax assets. The Company must consider all positive and negative evidence, including its forecasts of taxable income over the applicable carryforward periods, its current financial performance, its market environment and other factors in evaluating the need for a valuation allowance against its net U.S. deferred tax assets. As of April 1, 2023, the Company does not believe that it is more-likely-than-not that it would be able to utilize its domestic deferred tax assets in the foreseeable future. Accordingly, the domestic net deferred tax assets continued to be fully reserved with a valuation allowance. To the extent that the Company determines that deferred tax assets are realizable on a more-likely-than-not basis, and adjustment is needed, that adjustment will be recorded in the period that the determination is made and would generally decrease the valuation allowance and record a corresponding benefit to earnings.

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Segment Information

3 Months Ended

Apr. 01, 2023

Segment Reporting [Abstract]

Segment Information

Segment InformationOperating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is the Company’s Chief Executive Officer (the "CEO”). The CEO reviews financial information presented on a condensed consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. The Company has one business activity as a provider of optical transport networking equipment, software and related services. Accordingly, the Company is considered a single reporting segment and operating unit structure.

Revenue by geographic region is based on the shipping address of the customer. For more information regarding revenue disaggregated by geography, see Note 3, “Revenue Recognition” to the notes to condensed consolidated financial statements.

Additionally, the following table sets forth the Company's property, plant and equipment, net by geographic region (in thousands):

	April 1, 2023		December 31, 2022
United States	$	160,032	$	156,065
Other Americas	3,022		2,908
Europe, Middle East and Africa	10,286		10,285
Asia Pacific	3,667		3,671
Total property, plant and equipment, net	$	177,007	$	172,929

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Guarantees

3 Months Ended

Apr. 01, 2023

Guarantees [Abstract]

Guarantees

Guarantees

Product Warranties

Activity related to product warranty was as follows (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Beginning balance	$	36,621	$	44,310
Charges to operations	5,237		5,975
Utilization	(5,194)		(5,709)
Change in estimate(1)	(1,030)		(4,991)
Balance at the end of the period	$	35,634	$	39,585

(1)The Company records product warranty liabilities based on the latest quality and cost information available as of the date the revenue is recorded. The changes in estimate shown here are due to changes in overall actual failure rates, the mix of new compared to used units related to replacement of failed units, and changes in the estimated cost of repair and product recalls. As the Company's products mature over time, failure rates and repair costs associated with such products generally decline, leading to favorable changes in warranty reserves.

Letters of Credit and Bank Guarantees

The Company had $24.5 million and $24.7 million of standby letters of credit, bank guarantees and surety bonds outstanding as of April 1, 2023 and December 31, 2022, respectively. Details are provided in the table below (in thousands).

	April 1, 2023		December 31, 2022
Customer performance guarantees	$	19,406	$	20,903
Value added tax license	2,307		1,434
Property leases	2,769		2,398
Total	$	24,482	$	24,735

Of the $19.4 million related to customer performance guarantees as of April 1, 2023, approximately $4.0 million was used to secure surety bonds in the aggregate of $7.5 million. Of the $20.9 million related to customer performance guarantees as of December 31, 2022, approximately $4.0 million was used to secure surety bonds in the aggregate of $7.5 million.

As of April 1, 2023, of the aforementioned standby letters of credit and bank guarantees outstanding, $5.2 million was backed by cash collateral.

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Pension and Post-Retirement Benefit Plans

3 Months Ended

Apr. 01, 2023

Retirement Benefits [Abstract]

Pension and Post-Retirement Benefit Plans

Pension and Post-Retirement Benefit Plans

As a result of the acquisition of Telecom Holding Parent LLC (the "Acquisition"), the Company acquired a number of post-employment plans in Germany, as well as a number of smaller post-employment plans in other countries, including both defined contribution and defined benefit plans. The defined benefit plans expose the Company to actuarial risks such as investment risk, interest rate risk, life expectancy risk and salary risk. The characteristics of the defined benefit plans and the risks associated with them vary depending on legal, fiscal and economic requirements.

Components of Net Periodic Benefit Cost

Net periodic benefit cost for the Company's pension and other post-retirement benefit plans consisted of the following (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Service cost	$	67	$	80
Interest cost	769		333
Expected return on plan assets	(654)		(780)
Amortization of actuarial (gain) loss	(937)		87
Total net periodic benefit cost	$	(755)	$	(280)

The service cost component is included in operating expenses in the Company's condensed consolidated statements of operations. All other components are included in Other income (expense), net in the Company's condensed consolidated statements of operations.

Actuarial gains and losses are amortized using a corridor approach. The gain/loss corridor is equal to 10% of the greater of the pension benefit obligation and the market-related value of assets. Gains and losses in excess of the corridor are generally amortized over the average future working lifetime of the pension plan participants.

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Leases (Tables)

3 Months Ended

Apr. 01, 2023

Leases [Abstract]

Schedule of Assets And Liabilities, Lessee

The following table presents current and long-term portion of operating lease liabilities as classified in the condensed consolidated balance sheets (in thousands):

	April 1, 2023		December 31, 2022
Accrued expenses and other current liabilities	$	11,582	$	10,948
Other long-term liabilities	44,646		45,862
Total operating lease liability	$	56,228	$	56,810

Schedule of Operating Lease Liabilities

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Schedule of Finance Lease Liabilities

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Schedule of Lease Costs

The following table presents supplemental information for the Company's non-cancelable leases for the three-months ended April 1, 2023 (in thousands, except for weighted average and percentage data):

	Operating Lease			Finance Lease
Weighted average remaining lease term	5.16 years			1.32 years
Weighted average discount rate	9.29		%	7.82		%
Cash paid for amounts included in the measurement of lease liabilities	$	4,045		$	227
Leased assets obtained in exchange for new lease liabilities	$	1,846		$	208

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Revenue Recognition (Tables)

3 Months Ended

Apr. 01, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table presents the Company's revenue disaggregated by geography, based on the shipping address of the customer (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
United States	$	237,035	$	170,185
Other Americas	20,555		20,911
Europe, Middle East and Africa	93,250		108,611
Asia Pacific	41,235		39,167
Total revenue	$	392,075	$	338,874

The Company sells its products directly to customers who are predominantly service providers and to channel partners that sell on its behalf.

The following table presents the Company's revenue disaggregated by sales channel (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Direct	$	262,862	$	260,892
Indirect	129,213		77,982
Total revenue	$	392,075	$	338,874

Schedule of Contract with Customer, Asset and Liability

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers (in thousands):

	April 1, 2023		December 31, 2022
Assets (Liabilities)
Accounts receivable, net	$	334,434	$	419,735
Contract assets	$	65,174	$	60,172
Deferred revenue	$	(175,550)	$	(181,679)

Schedule of Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially satisfied) pursuant to contracts that are not subject to cancellation without penalty at the end of the reporting period (in thousands):

	Remainder of 2023		2024		2025		2026		2027		Thereafter		Total
Revenue expected to be recognized in the future as of April 1, 2023	$	594,213	$	238,535	$	47,156	$	10,664	$	5,731	$	6,427	$	902,726

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Fair Value Measurements (Tables)

3 Months Ended

Apr. 01, 2023

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the estimated fair values of the convertible senior notes (in thousands): 

	As of April 1, 2023					As of December 31, 2022
	Fair Value Measured Using					Fair Value Measured Using
	Level 1		Level 2	Total		Level 1		Level 2		Total
Convertible senior notes	$	—	$855,088	$	855,088	$	—	$	785,364	$	785,364

The following table presents the fair value of these financial assets and their levels within the fair value hierarchy (in thousands):

	As of April 1, 2023						As of December 31, 2022
	Fair Value Measured Using						Fair Value Measured Using
	Level 1		Level 2		Total		Level 1		Level 2		Total
Money market funds	$	85,000	$	—	$	85,000	$	95,000	$	—	$	95,000

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Apr. 01, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents details of the Company’s goodwill during the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	232,663
Foreign currency translation adjustments	1,111
Balance as of April 1, 2023	$	233,774

Schedule of Finite-Lived Intangible Assets

The following tables present details of the Company’s intangible assets as of April 1, 2023 and December 31, 2022 (in thousands, except for weighted average data):

	April 1, 2023
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	112,550	$	(78,954)	$	33,596	3.3
Developed technology	153,312		(146,247)		7,065		0.5
Total intangible assets with finite lives	$	265,862	$	(225,201)	$	40,661

	December 31, 2022
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Remaining Useful Life (In Years)
Intangible assets with finite lives:
Customer relationships and backlog	$	151,461	$	(114,294)	$	37,167	3.5
Developed technology	170,467		(159,847)		10,620		0.7
Total intangible assets with finite lives	$	321,928	$	(274,141)	$	47,787

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table summarizes the Company’s estimated future amortization expense of intangible assets with finite lives as of April 1, 2023 (in thousands):

			Fiscal Years
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Total future amortization expense	$	40,661	$	15,843	$	9,025	$	9,025	$	6,768	$	—	$	—

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Balance Sheet Details (Tables)

3 Months Ended

Apr. 01, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Allowance for Credit Losses

The following table provides a rollforward of the allowance for credit losses for accounts receivable for the three-months ended April 1, 2023 (in thousands):

Balance as of December 31, 2022	$	1,422
Additions(1)	266
Write offs(2)	(356)
Recoveries during the period	(322)
Other(3)	2
Balance as of April 1, 2023	$	1,012

(1)The new additions during the three-months ended April 1, 2023 are primarily due to specific reserves.

(2)The write offs during the three-months ended April 1, 2023 are primarily amounts fully reserved previously.

(3)Primarily represents foreign currency translation adjustments.

Schedule of Details of Selected Balance Sheet Items

The following table provides details of selected balance sheet items (in thousands):

	April 1, 2023		December 31, 2022
Inventory
Raw materials	$	67,601	$	48,688
Work in process	71,750		66,591
Finished goods	273,589		259,576
Total inventory	$	412,940	$	374,855
Property, plant and equipment, net
Computer hardware	$	47,514	$	46,454
Computer software(1)	58,867		62,102
Laboratory and manufacturing equipment	306,600		297,261
Land and building	12,372		12,369
Furniture and fixtures	2,862		2,828
Leasehold and building improvements	50,042		50,360
Construction in progress	48,702		42,418
Subtotal	526,959		513,792
Less accumulated depreciation and amortization(2)	(349,952)		(340,863)
Total property, plant and equipment, net	$	177,007	$	172,929
Accrued expenses and other current liabilities
Loss contingency related to non-cancelable purchase commitments	$	22,881	$	28,796
Taxes payable	41,676		42,757
Short-term operating and finance lease liability	12,364		11,701
Restructuring accrual	397		941
Other accrued expenses and other current liabilities	43,339		57,255
Total accrued expenses	$	120,657	$	141,450

(1)Included in computer software at April 1, 2023 and December 31, 2022 were $30.2 million and $29.3 million, respectively, related to enterprise resource planning (“ERP”) systems that the Company implemented. The unamortized ERP costs at April 1, 2023 and December 31, 2022 were $8.9 million and $9.0 million, respectively. Also included in computer software at April 1, 2023 and December 31, 2022 was $19.3 million and $24.2 million, respectively, related to term licenses. The unamortized term license costs at April 1, 2023 and December 31, 2022 was $7.1 million and $9.1 million, respectively.

(2)Depreciation expense was $12.5 million and $11.6 million (which includes depreciation of capitalized ERP cost of $0.9 million and $0.8 million, respectively) for the three-months ended April 1, 2023 and March 26, 2022, respectively. Also included in depreciation expense for three-months ended April 1, 2023 and March 26, 2022 was $2.2 million and $1.7 million, respectively, related to term licenses.

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Restructuring and Other Related Costs (Tables)

3 Months Ended

Apr. 01, 2023

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Other Related Costs

The following table presents restructuring and other related costs included in cost of revenue and operating expenses in the accompanying condensed consolidated statements of operations under the restructuring plans (in thousands):

	Three Months Ended
	April 1, 2023				March 26, 2022
	Cost of Revenue		Operating Expenses		Cost of Revenue		Operating Expenses
Severance and other related expenses	$	—	$	—	$	140	$	1,461
Lease related impairment charges	—		786		—		5,641
Others	—		4		10		168
Total	$	—	$	790	$	150	$	7,270

Schedule of Restructuring Reserve by Type of Cost

Restructuring liabilities are reported within accrued expenses and other long-term liabilities in the accompanying condensed consolidated balance sheets (in thousands):

	Severance and other related expenses		Lease related impairment charges		Others		Total
Balance at December 31, 2022	$	792	$	—	$	149	$	941
Charges	—		786		4		790
Cash Payments	(562)		(633)		(4)		(1,199)
Non-Cash Settlements and Other	15		(153)		3		(135)
Balance at April 1, 2023	$	245	$	—	$	152	$	397

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Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Apr. 01, 2023

Equity [Abstract]

Schedule of Changes in Accumulated Other Comprehensive Loss

The following table sets forth the changes in accumulated other comprehensive loss by component for the three-months ended April 1, 2023 (in thousands): 

	Foreign Currency Translation		Actuarial Gain (Loss) on Pension		Total
Balance at December 31, 2022	$	(49,632)	$	27,161	$	(22,471)
Other comprehensive loss before reclassifications	(7,171)		(447)		(7,618)
Amounts reclassified from accumulated other comprehensive loss	—		(937)		(937)
Net current-period other comprehensive loss	(7,171)		(1,384)		(8,555)
Balance at April 1, 2023	$	(56,803)	$	25,777	$	(31,026)

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Basic and Diluted Net Loss Per Common Share (Tables)

3 Months Ended

Apr. 01, 2023

Earnings Per Share [Abstract]

Schedule of Computation of Net Loss Per Common Share Basic and Diluted

The following table sets forth the computation of net loss per common share – basic and diluted (in thousands, except per share amounts):

	Three Months Ended
	April 1, 2023		March 26, 2022
Net loss	$	(8,410)	$	(41,850)
Weighted average common shares outstanding - basic and diluted	222,393		212,182
Net loss per common share - basic and diluted	$	(0.04)	$	(0.20)

Schedule of Antidilutive Shares Excluded from Computation of Diluted Net Loss Per Share

The following sets forth the potentially dilutive shares excluded from the computation of the diluted net loss per share because their effect was anti-dilutive (in thousands):

	Three Months Ended
	April 1, 2023	March 26, 2022
Convertible senior notes	40,100	69,930
Restricted stock units	15,582	17,887
Performance stock units	3,685	2,824
Employee stock purchase plan shares	—	1,095
Total	59,367	91,736

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Debt (Tables)

3 Months Ended

Apr. 01, 2023

Debt Disclosure [Abstract]

Schedule of Components of Convertible Senior Notes

The following is a summary of the Company's debt as of April 1, 2023 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.9	$	102.7	September 2024
2027 Notes	—		196.1		200.0		March 2027
2028 Notes	—		363.7		373.8		August 2028
Mortgage	7.1		—		7.1		March 2024
Total Debt	$	7.1	$	661.7	$	683.6

The following is a summary of the Company's debt as of December 31, 2022 (in millions):

	Net Carrying Value				Unpaid Principal Balance		Contractual Maturity Date
	Current		Long-Term
2024 Notes	$	—	$	101.7	$	102.7	September 2024
2027 Notes	—		195.9		200.0		March 2027
2028 Notes	—		363.3		373.8		August 2028
Mortgage	0.5		6.8		7.3		March 2024
Total Debt	$	0.5	$	667.7	$	683.8

The net carrying amount of the convertible senior notes as of April 1, 2023 and as of December 31, 2022 was as follows (in thousands):

	2024 Notes				2027 Notes				2028 Notes
	April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022		April 1, 2023		December 31, 2022
Principal	$	102,652	$	102,652	$	200,000	$	200,000	$	373,650	$	373,750
Unamortized issuance costs	(789)		(926)		(3,887)		(4,121)		(9,987)		(10,401)
Net carrying amount	$	101,863	$	101,726	$	196,113	$	195,879	$	363,663	$	363,349

Schedule of Interest Expense Recognized Related To Notes

The following table presents the interest expense related to the contractual interest coupon and the amortization of debt issuance costs on the Company's convertible senior notes (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Contractual interest expense	$	5,299	$	3,388
Amortization of debt issuance costs	785		767
Total interest expense	$	6,084	$	4,155

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Commitments and Contingencies (Tables)

3 Months Ended

Apr. 01, 2023

Commitments and Contingencies Disclosure [Abstract]

Schedule of Operating Lease Liabilities

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Schedule of Finance Lease Liabilities

The following table presents maturity of lease liabilities under the Company's non-cancelable leases as of April 1, 2023 (in thousands):

	Operating Lease		Finance Lease
Total lease payments	$	70,357	$	1,006
Less: interest(1)	14,129		59
Present value of lease liabilities	$	56,228	$	947

(1)    Calculated using the interest rate for each lease.

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Schedule of Maturities of Long-term Debt

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

Schedule of Short-term Debt

The following table sets forth commitments and contingencies related to the Company's various obligations (in thousands):

			Payments Due by Period
	Total		Remainder of 2023		2024		2025		2026		2027		Thereafter
Operating leases(1)(2)	$	70,357	$	12,226	$	15,481	$	13,747	$	10,338	$	7,979	$	10,586
Finance lease obligations(3)	1,006		624		268		91		23		—		—
2028 Notes, including interest(4)	450,836		7,007		14,016		14,016		14,016		14,016		387,765
2027 Notes, including interest(4)	220,000		2,500		5,000		5,000		5,000		202,500		—
2024 Notes, including interest(4)	105,924		1,091		104,833		—		—		—		—
Mortgage Payable, including interest(4)	7,415		586		6,829		—		—		—		—
Total contractual obligations	$	855,538	$	24,034	$	146,427	$	32,854	$	29,377	$	224,495	$	398,351

(1)The Company leases facilities under non-cancelable operating lease agreements. These leases have varying terms that range from one to 11 years. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(2)The Company has contractual commitments to remove leasehold improvements and return certain properties to a specified condition when the leases terminate. At the inception of a lease with such conditions, the Company records an asset retirement obligation liability and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. Asset retirement obligations were $4.7 million and $4.9 million as of April 1, 2023 and December 31, 2022, respectively. Of the $4.7 million as of April 1, 2023, $4.6 million is classified as other long-term liabilities on the accompanying condensed consolidated balance sheets. The remainder is classified as accrued expenses and other current liabilities.

(3)The Company has finance leases for manufacturing and other equipment. The above payment schedule includes interest. See Note 2, "Leases" to the notes to condensed consolidated financial statements for more information.

(4)See Note 10, "Debt" to the notes to condensed consolidated financial statements for more information.

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Stockholders' Equity (Tables)

3 Months Ended

Apr. 01, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Company's Equity Award Activity - RSUs

(in thousands except weighted average data)	Number of Restricted Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	12,588	$	8.13	$	84,847
RSUs granted	5,931	$	7.34
RSUs released	(2,801)	$	8.45	$	20,343
RSUs canceled	(137)	$	8.25
Outstanding at April 1, 2023	15,581	$	7.77	120,914

Schedule of Company's Equity Award Activity - PSUs

(in thousands except weighted average data)	Number of Performance Stock Units	Weighted Average  Grant Date  Fair Value Per Share		Aggregate Intrinsic Value
Outstanding at December 31, 2022	2,559	$	7.40	$	17,251
PSUs granted	1,835	$	7.26
PSUs canceled	(708)	$	5.89
Outstanding at April 1, 2023	3,686	$	7.62	$	28,603

Schedule of Total Stock Based Compensation Cost for Instruments Granted but Not Yet Amortized

The following table presents total stock-based compensation cost for instruments granted but not yet fully amortized, of the Company’s equity compensation plans as of April 1, 2023. These costs are expected to be amortized on a straight-line basis over the following weighted-average periods (in thousands, except for weighted average period data):

	Unrecognized Compensation Expense, Net		Weighted Average Period (in Years)
RSUs	$	105,199	2.33
PSUs	$	26,268	2.11

Schedule of Estimated Fair Value of ESPP Shares

The fair value of the ESPP shares was estimated at the date of grant using the following assumptions:

	Three Months Ended
	April 1, 2023	March 26, 2022
Volatility	60%	39%
Risk-free interest rate	4.98%	0.67%
Expected life	0.5 years	0.5 years
Estimated fair value	$2.37	$2.21

Schedule of Nonvested Performance Based Units Activity by Grant Year

The following table summarizes by grant year, the Company’s PSU activity for the three-months ended April 1, 2023 (in thousands):

	Total Number of Performance Stock Units	2020	2021	2022	2023
Outstanding at December 31, 2022	2,559	1,058	602	899	—
PSUs granted	1,835	—	—	—	1,835
PSUs canceled	(708)	(708)	—	—	—
Outstanding at April 1, 2023	3,686	350	602	899	1,835

Schedule of Effects of Stock-Based Compensation on Company's Balance Sheets and Statements of Operations

The following tables summarize the effects of stock-based compensation on the Company’s condensed consolidated balance sheets and statements of operations for the periods presented (in thousands):

	April 1, 2023		December 31, 2022
Stock-based compensation effects in inventory	$	4,267	$	3,979

	Three Months Ended
	April 1, 2023		March 26, 2022
Income tax benefit associated with stock-based compensation	$	1,984	$	2,226
Stock-based compensation effects in net loss before income taxes
Cost of revenue	$	2,276	$	1,889
Research and development	5,623		4,841
Sales and marketing	3,594		2,767
General and administration	4,158		3,442
Total stock-based compensation expense	$	15,651	$	12,939

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Segment Information (Tables)

3 Months Ended

Apr. 01, 2023

Segment Reporting [Abstract]

Schedule of Long Lived Assets

Additionally, the following table sets forth the Company's property, plant and equipment, net by geographic region (in thousands):

	April 1, 2023		December 31, 2022
United States	$	160,032	$	156,065
Other Americas	3,022		2,908
Europe, Middle East and Africa	10,286		10,285
Asia Pacific	3,667		3,671
Total property, plant and equipment, net	$	177,007	$	172,929

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Guarantees (Tables)

3 Months Ended

Apr. 01, 2023

Guarantees [Abstract]

Schedule of Activity Related to Product Warranty

Activity related to product warranty was as follows (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Beginning balance	$	36,621	$	44,310
Charges to operations	5,237		5,975
Utilization	(5,194)		(5,709)
Change in estimate(1)	(1,030)		(4,991)
Balance at the end of the period	$	35,634	$	39,585

(1)The Company records product warranty liabilities based on the latest quality and cost information available as of the date the revenue is recorded. The changes in estimate shown here are due to changes in overall actual failure rates, the mix of new compared to used units related to replacement of failed units, and changes in the estimated cost of repair and product recalls. As the Company's products mature over time, failure rates and repair costs associated with such products generally decline, leading to favorable changes in warranty reserves.

Schedule of Guarantor Obligations

Details are provided in the table below (in thousands).

	April 1, 2023		December 31, 2022
Customer performance guarantees	$	19,406	$	20,903
Value added tax license	2,307		1,434
Property leases	2,769		2,398
Total	$	24,482	$	24,735

XML

Pension and Post-Retirement Benefit Plans (Tables)

3 Months Ended

Apr. 01, 2023

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic benefit cost for the Company's pension and other post-retirement benefit plans consisted of the following (in thousands):

	Three Months Ended
	April 1, 2023		March 26, 2022
Service cost	$	67	$	80
Interest cost	769		333
Expected return on plan assets	(654)		(780)
Amortization of actuarial (gain) loss	(937)		87
Total net periodic benefit cost	$	(755)	$	(280)

XML

Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Operating lease expense	$ 3.8	$ 9.3
Accelerated rent expense	0.8	$ 5.6
Finance lease, right-of-use asset	$ 2.0		$ 1.9
Minimum
Property, Plant and Equipment [Line Items]
Term of finance lease	3 years
Maximum
Property, Plant and Equipment [Line Items]
Term of finance lease	5 years

XML

Leases - Schedule of Assets And Liabilities, Lessee, Operating Leases (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Leases [Abstract]
Accrued expenses and other current liabilities	$ 11,582	$ 10,948
Other long-term liabilities	44,646	45,862
Total operating lease liability	$ 56,228	$ 56,810
Finance lease, liability, current, statement of financial position [Extensible Enumeration]	Accrued expenses and other current liabilities	Accrued expenses and other current liabilities
Finance lease, liability, statement of financial position [Extensible List]	Other long-term liabilities	Other long-term liabilities

XML

Leases - Schedule of Operating Lease and Finance Lease Liabilities (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Operating Lease
Total lease payments	$ 70,357
Less: interest	14,129
Present value of lease liabilities	56,228	$ 56,810
Finance Lease
Total lease payments	1,006
Less: interest	59
Present value of lease liabilities	$ 947

XML

Leases - Schedule of Lease Costs (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($)
Leases [Abstract]
Weighted average remaining lease term	5 years 1 month 28 days
Weighted average discount rate	9.29%
Cash paid for amounts included in the measurement of lease liabilities	$ 4,045
Leased assets obtained in exchange for new lease liabilities	$ 1,846
Weighted average remaining lease term	1 year 3 months 25 days
Weighted average discount rate	7.82%
Cash paid for amounts included in the measurement of lease liabilities	$ 227
Leased assets obtained in exchange for new lease liabilities	$ 208

XML

Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 392,075	$ 338,874
Direct
Disaggregation of Revenue [Line Items]
Total revenue	262,862	260,892
Indirect
Disaggregation of Revenue [Line Items]
Total revenue	129,213	77,982
United States
Disaggregation of Revenue [Line Items]
Total revenue	237,035	170,185
Other Americas
Disaggregation of Revenue [Line Items]
Total revenue	20,555	20,911
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total revenue	93,250	108,611
Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	$ 41,235	$ 39,167

XML

Revenue Recognition - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 334,434	$ 419,735
Contract assets	65,174	60,172
Deferred revenue	$ (175,550)	$ (181,679)

XML

Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Revenue from Contract with Customer [Abstract]
Deferred revenue recognized	$ 50.9	$ 44.9

XML

Revenue Recognition - Schedule of Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction (Details) $ in Thousands	Apr. 01, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 902,726
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-02
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 594,213
Revenue expected to be recognized in the future, period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 238,535
Revenue expected to be recognized in the future, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 47,156
Revenue expected to be recognized in the future, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 10,664
Revenue expected to be recognized in the future, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 5,731
Revenue expected to be recognized in the future, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Disaggregation of Revenue [Line Items]
Revenue expected to be recognized in the future as of April 1, 2023	$ 6,427
Revenue expected to be recognized in the future, period

XML

Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Money Market Funds
Assets (Liabilities)
Money market funds	$ 85,000	$ 95,000
Level 1 | Money Market Funds
Assets (Liabilities)
Money market funds	85,000	95,000
Level 2 | Money Market Funds
Assets (Liabilities)
Money market funds	0	0
Convertible senior notes
Assets (Liabilities)
Convertible senior notes	855,088	785,364
Convertible senior notes | Level 1
Assets (Liabilities)
Convertible senior notes	0	0
Convertible senior notes | Level 2
Assets (Liabilities)
Convertible senior notes	$ 855,088	$ 785,364

XML

Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023		Mar. 26, 2022		Dec. 31, 2022	Dec. 25, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accelerated rent expense	$ 800		$ 5,600
Cash, cash equivalents and restricted cash	169,734	[1]	$ 204,028	[1]	$ 189,203	$ 202,521
Foreign Subsidiary
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, cash equivalents and restricted cash	$ 65,100				$ 65,900

[1] Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets: April 1,
2023March 26,
2022Cash and cash equivalents$163,765 $191,937 Short-term restricted cash3,873 6,528 Long-term restricted cash2,096 5,563 Total cash, cash equivalents and restricted cash$169,734 $204,028 

XML

Goodwill and Intangible Assets - Schedule of Goodwill Roll Forward (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 232,663
Foreign currency translation adjustments	1,111
Goodwill, ending balance	$ 233,774

XML

Goodwill and Intangible Assets - Schedule of Purchased Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 01, 2023	Dec. 31, 2022
Intangible assets with finite lives:
Gross Carrying Amount	$ 265,862	$ 321,928
Accumulated Amortization	(225,201)	(274,141)
Net Carrying Amount	40,661	47,787
Customer relationships and backlog
Intangible assets with finite lives:
Gross Carrying Amount	112,550	151,461
Accumulated Amortization	(78,954)	(114,294)
Net Carrying Amount	$ 33,596	$ 37,167
Weighted Average Remaining Useful Life (In Years)	3 years 3 months 18 days	3 years 6 months
Developed technology
Intangible assets with finite lives:
Gross Carrying Amount	$ 153,312	$ 170,467
Accumulated Amortization	(146,247)	(159,847)
Net Carrying Amount	$ 7,065	$ 10,620
Weighted Average Remaining Useful Life (In Years)	6 months	8 months 12 days

XML

Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 7.1	$ 10.0

XML

Goodwill and Intangible Assets - Schedule of Future Amortization Expense (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Net Carrying Amount	$ 40,661	$ 47,787
Remainder of 2023	15,843
2024	9,025
2025	9,025
2026	6,768
2027	0
Thereafter	$ 0

XML

Balance Sheet Details - Schedule of Allowance for credit losses (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 1,422
Additions	266
Write offs	(356)
Recoveries during the period	(322)
Other	2
Ending balance	$ 1,012

XML

Balance Sheet Details - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Property, Plant and Equipment [Line Items]
Interest expense	$ 6,800	$ 4,992
Trade Accounts Receivable
Property, Plant and Equipment [Line Items]
Interest expense	300	100
Receivables sold	$ 21,200	$ 24,000

XML

Balance Sheet Details - Schedule of Selected Balance Sheet Items (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022	Dec. 31, 2022
Inventory
Raw materials	$ 67,601		$ 48,688
Work in process	71,750		66,591
Finished goods	273,589		259,576
Total inventory	412,940		374,855
Property, plant and equipment, net
Subtotal	526,959		513,792
Less accumulated depreciation and amortization	(349,952)		(340,863)
Total property, plant and equipment, net	177,007		172,929
Accrued expenses and other current liabilities
Loss contingency related to non-cancelable purchase commitments	22,881		28,796
Taxes payable	41,676		42,757
Short-term operating and finance lease liability	12,364		11,701
Restructuring accrual	397		941
Other accrued expenses and other current liabilities	43,339		57,255
Total accrued expenses	120,657		141,450
Depreciation	12,500	$ 11,600
License Agreement Terms
Accrued expenses and other current liabilities
Depreciation	2,200	1,700
Computer hardware
Property, plant and equipment, net
Subtotal	47,514		46,454
Computer software
Property, plant and equipment, net
Subtotal	58,867		62,102
Laboratory and manufacturing equipment
Property, plant and equipment, net
Subtotal	306,600		297,261
Land and building
Property, plant and equipment, net
Subtotal	12,372		12,369
Furniture and fixtures
Property, plant and equipment, net
Subtotal	2,862		2,828
Leasehold and building improvements
Property, plant and equipment, net
Subtotal	50,042		50,360
Construction in progress
Property, plant and equipment, net
Subtotal	48,702		42,418
Enterprise Resource Planning Systems
Property, plant and equipment, net
Subtotal	30,200		29,300
Total property, plant and equipment, net	8,900		9,000
Accrued expenses and other current liabilities
Depreciation	900	$ 800
Enterprise Resource Planning Systems | License
Property, plant and equipment, net
Subtotal	19,300		24,200
Total property, plant and equipment, net	$ 7,100		$ 9,100

XML

Restructuring and Other Related Costs - Narrative (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 397	$ 941
Severance and other related expenses
Restructuring Cost and Reserve [Line Items]
Restructuring liability	245	$ 792
Severance and other related expenses | Telecom Holding Parent LLC
Restructuring Cost and Reserve [Line Items]
Restructuring liability	100
2021 Restructuring Plan | Severance and other related expenses
Restructuring Cost and Reserve [Line Items]
Restructuring liability	$ 300

XML

Restructuring and Other Related Costs - Schedule of Restructuring and Other Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	$ 790
Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0	$ 150
Operating Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	790	7,270
Severance and other related expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0
Severance and other related expenses | Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0	140
Severance and other related expenses | Operating Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0	1,461
Lease related impairment charges
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	786
Lease related impairment charges | Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0	0
Lease related impairment charges | Operating Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	786	5,641
Others
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	4
Others | Cost of Revenue
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	0	10
Others | Operating Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and other related costs	$ 4	$ 168

XML

Restructuring and Other Related Costs - Schedule of Restructuring Reserve by Type of Cost (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($)
Restructuring Reserve [Roll Forward]
Beginning balance	$ 941
Charges	790
Cash Payments	(1,199)
Non-Cash Settlements and Other	(135)
Ending balance	397
Severance and other related expenses
Restructuring Reserve [Roll Forward]
Beginning balance	792
Charges	0
Cash Payments	(562)
Non-Cash Settlements and Other	15
Ending balance	245
Lease related impairment charges
Restructuring Reserve [Roll Forward]
Beginning balance	0
Charges	786
Cash Payments	(633)
Non-Cash Settlements and Other	(153)
Ending balance	0
Others
Restructuring Reserve [Roll Forward]
Beginning balance	149
Charges	4
Cash Payments	(4)
Non-Cash Settlements and Other	3
Ending balance	$ 152

XML

Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 179,647	$ 323,771
Other comprehensive loss before reclassifications	(7,618)
Amounts reclassified from accumulated other comprehensive loss	(937)
Net change in accumulated other comprehensive loss	(8,555)	(11,114)
Ending balance	186,256	170,205
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(22,471)	(4,496)
Net change in accumulated other comprehensive loss	(8,555)	(11,114)
Ending balance	(31,026)	$ (15,610)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(49,632)
Other comprehensive loss before reclassifications	(7,171)
Amounts reclassified from accumulated other comprehensive loss	0
Net change in accumulated other comprehensive loss	(7,171)
Ending balance	(56,803)
Actuarial Gain (Loss) on Pension
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	27,161
Other comprehensive loss before reclassifications	(447)
Amounts reclassified from accumulated other comprehensive loss	(937)
Net change in accumulated other comprehensive loss	(1,384)
Ending balance	$ 25,777

XML

Basic and Diluted Net Loss Per Common Share - Schedule of Computation of Net Loss Per Common Share Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Earnings Per Share [Abstract]
Net loss	$ (8,410)	$ (41,850)
Weighted average common shares outstanding - basic (in shares)	222,393	212,182
Weighted average common shares outstanding - diluted (in shares)	222,393	212,182
Net loss per common share - basic (in dollars per share)	$ (0.04)	$ (0.20)
Net loss per common share - diluted (in dollars per share)	$ (0.04)	$ (0.20)

XML

Basic and Diluted Net Loss Per Common Share - Schedule of Antidilutive Shares Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share computation (in shares)	59,367	91,736
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share computation (in shares)	40,100	69,930
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share computation (in shares)	15,582	17,887
Performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share computation (in shares)	3,685	2,824
Employee stock purchase plan shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share computation (in shares)	0	1,095

XML

Debt - Schedule of Components of Convertible Senior Notes (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current	$ 7,100	$ 500
Long-term debt, net	661,739	667,719
Unpaid Principal Balance	683,600	683,800
Mortgage
Debt Instrument [Line Items]
Current	7,100	500
Long-term debt, net	0	6,800
Unpaid Principal Balance	7,100	7,300
2024 Notes
Debt Instrument [Line Items]
Long-term debt, net	101,863	101,726
2024 Notes | Convertible senior notes
Debt Instrument [Line Items]
Current	0	0
Long-term debt, net	101,900	101,700
Unpaid Principal Balance	102,700	102,700
2027 Notes
Debt Instrument [Line Items]
Long-term debt, net	196,113	195,879
2027 Notes | Convertible senior notes
Debt Instrument [Line Items]
Current	0	0
Long-term debt, net	196,100	195,900
Unpaid Principal Balance	200,000	200,000
2028 Notes
Debt Instrument [Line Items]
Long-term debt, net	363,663	363,349
2028 Notes | Convertible senior notes
Debt Instrument [Line Items]
Current	0	0
Long-term debt, net	363,700	363,300
Unpaid Principal Balance	$ 373,800	$ 373,800

XML

Debt - Narrative (Details)						1 Months Ended
	Aug. 08, 2022	Jun. 24, 2022 USD ($)	Dec. 26, 2021	Sep. 24, 2021 USD ($) installment	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($) installment	Sep. 30, 2018 USD ($)	Apr. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current								$ 7,100,000	$ 500,000
Letter of Credit | Banker's Guarantees or Performance Bonds
Accounts, Notes, Loans and Financing Receivable [Line Items]
Letters of credit outstanding								19,100,000
Line of credit, outstanding								19,100,000
2024 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount								102,652,000	102,652,000
Conversion ratio							0.1012812
2027 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount								200,000,000	200,000,000
2028 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount								373,650,000	373,750,000
Conversion ratio							0.1471183
Senior Notes | 2024 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount							$ 402,500,000
Contractual Interest Rates							2.125%
Additional effective rate of interest to be used on amortized carrying value			2.70%
Debt issuance costs amortization period			17 months
Senior Notes | 2027 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount					$ 200,000,000
Contractual Interest Rates					2.50%
Additional effective rate of interest to be used on amortized carrying value					3.00%
Debt issuance costs amortization period					47 months
Conversion ratio							0.1305995
Senior Notes | 2028 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt instrument, face amount										$ 373,800,000
Contractual Interest Rates										3.75%
Additional effective rate of interest to be used on amortized carrying value	4.30%
Debt issuance costs amortization period	64 months
Asset-based revolving credit facility | Credit Agreement | Revolving Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity		$ 200,000,000
Additional borrowing capacity		$ 100,000,000
Commitment fee percentage		0.25%
Debt issuance costs, net								1,200,000
Debt available borrowing capacity								133,400,000
Asset-based revolving credit facility | Credit Agreement | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate		1.25%
Asset-based revolving credit facility | Credit Agreement | Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate		1.75%
Asset-based revolving credit facility | Credit Agreement | Revolving Credit Facility | Base Rate | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate		0.25%
Asset-based revolving credit facility | Credit Agreement | Revolving Credit Facility | Base Rate | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Variable rate		0.75%
Asset-based revolving credit facility | Credit Agreement | Letter of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity		$ 50,000,000						50,000,000
Asset-based revolving credit facility | Credit Agreement | Swing Loan Sub-Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum borrowing capacity		$ 20,000,000
Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contractual Interest Rates				3.80%		5.25%
Proceeds from debt						$ 8,700,000
Debt payment installments | installment				31		59
Debt term						5 years
Debt payment				$ 100,000
Current								$ 7,100,000	$ 500,000

XML

Debt - Schedule of Interest Expense Recognized Related to Notes Prior to Capitalization of Interest (Details) - 2024 Notes - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Debt Instrument [Line Items]
Contractual interest expense	$ 5,299	$ 3,388
Amortization of debt issuance costs	785	767
Total interest expense	$ 6,084	$ 4,155

XML

Debt - Schedule of Net Carrying Amount (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Long-term debt, net	$ 661,739	$ 667,719
2024 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal	102,652	102,652
Unamortized issuance costs	(789)	(926)
Long-term debt, net	101,863	101,726
2027 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal	200,000	200,000
Unamortized issuance costs	(3,887)	(4,121)
Long-term debt, net	196,113	195,879
2028 Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal	373,650	373,750
Unamortized issuance costs	(9,987)	(10,401)
Long-term debt, net	$ 363,663	$ 363,349

XML

Commitments and Contingencies - Schedule of Future Annual Minimum Operating Lease Payments (Details) $ in Thousands	Apr. 01, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Total lease payments	$ 70,357
Remainder of 2023	12,226
2024	15,481
2025	13,747
2026	10,338
2027	7,979
Thereafter	$ 10,586

XML

Commitments and Contingencies - Schedule of Finance Lease Obligations (Details) $ in Thousands	Apr. 01, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Total lease payments	$ 1,006
Remainder of 2023	624
2024	268
2025	91
2026	23
2027	0
Thereafter	$ 0

XML

Commitments and Contingencies - Schedule of Future Interest and Principal Payments (Details) $ in Thousands	Apr. 01, 2023 USD ($)
Mortgage
Debt Instrument [Line Items]
Total	$ 7,415
Remainder of 2023	586
2024	6,829
2025	0
2026	0
2027	0
Thereafter	0
2028 Notes, including interest | Senior Notes
Debt Instrument [Line Items]
Total	450,836
Remainder of 2023	7,007
2024	14,016
2025	14,016
2026	14,016
2027	14,016
Thereafter	387,765
2027 Notes, including interest | Senior Notes
Debt Instrument [Line Items]
Total	220,000
Remainder of 2023	2,500
2024	5,000
2025	5,000
2026	5,000
2027	202,500
Thereafter	0
2024 Notes, including interest | Senior Notes
Debt Instrument [Line Items]
Total	105,924
Remainder of 2023	1,091
2024	104,833
2025	0
2026	0
2027	0
Thereafter	$ 0

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Commitments and Contingencies - Schedule of Total Contractual Obligations (Details) $ in Thousands	Apr. 01, 2023 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Total contractual obligations	$ 855,538
Remainder of 2023	24,034
2024	146,427
2025	32,854
2026	29,377
2027	224,495
Thereafter	$ 398,351

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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	Apr. 01, 2023	Dec. 31, 2022
Loss Contingencies [Line Items]
Asset retirement obligations	$ 4.7	$ 4.9
Other Long Term Liabilities
Loss Contingencies [Line Items]
Asset retirement obligations	$ 4.6
Minimum
Loss Contingencies [Line Items]
Operating lease term	1 year
Maximum
Loss Contingencies [Line Items]
Operating lease term	11 years

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Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended
	May 31, 2019	Feb. 28, 2016	Apr. 01, 2023	Mar. 26, 2022	Mar. 31, 2023	May 31, 2022	May 31, 2021	May 31, 2020	May 31, 2018	May 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of common stock (in dollars per share)					$ 7.76
Stock based compensation expense			$ 15,651	$ 12,939
2016 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan maximum term		10 years
Increase in number of shares authorized (in shares)	7,300,000					8,500,000	4,400,000	8,100,000	1,500,000	6,400,000
Reserved common stock for issuance of options (in shares)			43,700,000
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense			$ 1,600	1,300
ESPP | 2007 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issued (in shares)	31,600,000
Plan maximum term	20 years
Payroll deduction price as a percentage of market value	85.00%
Maximum employee subscription rate	15.00%
Maximum number of shares per employee (in shares)	3,000
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization of stock based compensation			13,000	10,900
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization of stock based compensation			$ 1,400	$ 900

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Stockholders' Equity - Schedule of Company's Equity Award Activity - RSUs (Details) - Restricted Stock Units $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($) $ / shares shares
Number of Restricted Stock Units
Number of units, beginning balance (in shares) | shares	12,588
Number of units granted (in shares) | shares	5,931
Number of units released (in shares) | shares	(2,801)
Number units canceled (in shares) | shares	(137)
Number of units, ending balance (in shares) | shares	15,581
Weighted Average  Grant Date  Fair Value Per Share
Weighted Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 8.13
Weighted Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	7.34
Weighted Average Grant Date Fair Value Per Share, released (in dollars per share) | $ / shares	8.45
Weighted Average Grant Date Fair Value Per Share, canceled (in dollars per share) | $ / shares	8.25
Weighted Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 7.77
Aggregate Intrinsic Value
Aggregate Intrinsic Value, beginning balance | $	$ 84,847
Aggregate Intrinsic Value, RSUs released | $	20,343
Aggregate Intrinsic Value, ending balance | $	$ 120,914

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Stockholders' Equity - Schedule of Company's Equity Award Activity - PSUs (Details) - Performance stock units $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($) $ / shares shares
Number of Performance Stock Units
Number of units, beginning balance (in shares) | shares	2,559
Number of units granted (in shares) | shares	1,835
Number units canceled (in shares) | shares	(708)
Number of units, ending balance (in shares) | shares	3,686
Weighted Average  Grant Date  Fair Value Per Share
Weighted Average Grant Date Fair Value Per Share, beginning balance (in dollars per share) | $ / shares	$ 7.40
Weighted Average Grant Date Fair Value Per Share, granted (in dollars per share) | $ / shares	7.26
Weighted Average Grant Date Fair Value Per Share, canceled (in dollars per share) | $ / shares	5.89
Weighted Average Grant Date Fair Value Per Share, ending balance (in dollars per share) | $ / shares	$ 7.62
Aggregate Intrinsic Value
Aggregate Intrinsic Value, beginning balance | $	$ 17,251
Aggregate Intrinsic Value, ending balance | $	$ 28,603

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Stockholders' Equity - Schedule of Total Stock Based Compensation Cost for Instruments Granted but Not Yet Amortized (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($)
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, Net	$ 105,199
Weighted Average Period (in Years)	2 years 3 months 29 days
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Expense, Net	$ 26,268
Weighted Average Period (in Years)	2 years 1 month 9 days

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Stockholders' Equity - Schedule of Estimated Fair Value of ESPP, Valuation Assumptions (Details) - ESPP - $ / shares	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Volatility	60.00%	39.00%
Risk-free interest rate	4.98%	0.67%
Expected life	6 months	6 months
Estimated fair value (in dollars per share)	$ 2.37	$ 2.21

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Stockholders' Equity - Schedule of Nonvested Performance Based Units Activity By Grant Year (Details) - PSUs shares in Thousands	3 Months Ended
	Apr. 01, 2023 shares
Number of Performance Stock Units
Number of units, beginning balance (in shares)	2,559
Number of units granted (in shares)	1,835
Number units canceled (in shares)	(708)
Number of units, ending balance (in shares)	3,686
2020
Number of Performance Stock Units
Number of units, beginning balance (in shares)	1,058
Number of units granted (in shares)	0
Number units canceled (in shares)	(708)
Number of units, ending balance (in shares)	350
2021
Number of Performance Stock Units
Number of units, beginning balance (in shares)	602
Number of units granted (in shares)	0
Number units canceled (in shares)	0
Number of units, ending balance (in shares)	602
2022
Number of Performance Stock Units
Number of units, beginning balance (in shares)	899
Number of units granted (in shares)	0
Number units canceled (in shares)	0
Number of units, ending balance (in shares)	899
2023
Number of Performance Stock Units
Number of units, beginning balance (in shares)	0
Number of units granted (in shares)	1,835
Number units canceled (in shares)	0
Number of units, ending balance (in shares)	1,835

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Stockholders' Equity - Schedule of Effects of Stock-Based Compensation on Company's Balance Sheets and Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022	Dec. 31, 2022
Effects Of Stock Based Compensation [Line Items]
Income tax benefit associated with stock-based compensation	$ 1,984	$ 2,226
Total stock-based compensation expense	15,651	12,939
Cost of revenue
Effects Of Stock Based Compensation [Line Items]
Stock-based compensation effects in net loss before income taxes	2,276	1,889
Research and development
Effects Of Stock Based Compensation [Line Items]
Stock-based compensation effects in net loss before income taxes	5,623	4,841
Sales and marketing
Effects Of Stock Based Compensation [Line Items]
Stock-based compensation effects in net loss before income taxes	3,594	2,767
General and administration
Effects Of Stock Based Compensation [Line Items]
Stock-based compensation effects in net loss before income taxes	4,158	$ 3,442
Inventory Valuation and Obsolescence
Effects Of Stock Based Compensation [Line Items]
Stock-based compensation effects in inventory	$ 4,267		$ 3,979

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Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Income Tax Disclosure [Abstract]
Tax expense	$ 3,572	$ 6,437
Pre-tax loss	4,838	$ 35,413
Provision for income taxes increase (decrease)	$ (2,800)

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Segment Information (Details) $ in Thousands	3 Months Ended
	Apr. 01, 2023 USD ($) segment	Dec. 31, 2022 USD ($)
Segment Reporting [Abstract]
Number of business activities | segment	1
Number of reporting segments | segment	1
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property, plant and equipment, net	$ 177,007	$ 172,929
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property, plant and equipment, net	160,032	156,065
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property, plant and equipment, net	3,022	2,908
Europe, Middle East and Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property, plant and equipment, net	10,286	10,285
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property, plant and equipment, net	$ 3,667	$ 3,671

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Guarantees - Schedule of Activity Related to Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 36,621	$ 44,310
Charges to operations	5,237	5,975
Utilization	(5,194)	(5,709)
Change in estimate	(1,030)	(4,991)
Balance at the end of the period	$ 35,634	$ 39,585

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Guarantees - Narrative (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Outstanding standby letters of credit	$ 24,482	$ 24,735
Bond secure amount	4,000	4,000
Surety Bond
Guarantor Obligations [Line Items]
Bond secure amount	7,500	7,500
Letter of Credit
Guarantor Obligations [Line Items]
Customer performance guarantees	19,406	$ 20,903
Cash collateral	$ 5,200

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Guarantees - Schedule of Guarantor Obligations (Details) - USD ($) $ in Thousands	Apr. 01, 2023	Dec. 31, 2022
Guarantor Obligations [Line Items]
Total	$ 24,482	$ 24,735
Letter of Credit
Guarantor Obligations [Line Items]
Customer performance guarantees	19,406	20,903
Value added tax license	2,307	1,434
Property leases	$ 2,769	$ 2,398

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Pension and Post-Retirement Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Mar. 26, 2022
Retirement Benefits [Abstract]
Service cost	$ 67	$ 80
Interest cost	769	333
Expected return on plan assets	(654)	(780)
Amortization of actuarial (gain) loss	(937)	87
Total net periodic benefit cost	$ (755)	$ (280)

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Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2020-06 [Member]