10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended March 31, 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: 001-35451

MACOM Technology Solutions Holdings, Inc.

(Exact name of registrant as specified in its charter) 

Delaware	27-0306875
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

100 Chelmsford Street

Lowell, MA 01851

(Address of principal executive offices and zip code)

(978) 656-2500

(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	MTSI	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 May 1, 2023, there were 70,884,080 shares of the registrant’s common stock outstanding.

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

FORM 10-Q

TABLE OF CONTENTS

			Page No.
PART I—FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited)		1
		Condensed Consolidated Balance Sheets	1
		Condensed Consolidated Statements of Operations	2
		Condensed Consolidated Statements of Comprehensive Income	3
		Condensed Consolidated Statements of Stockholders’ Equity	4
		Condensed Consolidated Statements of Cash Flows	6
		Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		25
Item 4.	Controls and Procedures		26
PART II—OTHER INFORMATION
Item 1.	Legal Proceedings		27
Item 1A.	Risk Factors		27
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds		28
Item 6.	Exhibits		29
Signatures			30

PART I—FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited, in thousands)

	March 31, 2023		September 30, 2022
ASSETS
Current assets:
Cash and cash equivalents	$	136,573	$	119,952
Short-term investments	440,735		466,580
Accounts receivable, net	121,823		101,551
Inventories	131,882		114,960
Prepaid and other current assets	17,303		10,040
Total current assets	848,316		813,083
Property and equipment, net	123,266		123,701
Goodwill	324,610		311,417
Intangible assets, net	67,289		51,254
Deferred income taxes	217,816		237,415
Other long-term assets	36,176		34,947
Total assets	$	1,617,473	$	1,571,817
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Current portion of finance lease obligations	$	4,870	$	1,006
Accounts payable	31,095		30,733
Accrued liabilities	55,284		65,475
Total current liabilities	91,249		97,214
Finance lease obligations, less current portion	26,486		27,032
Financing obligation	9,436		9,544
Long-term debt	566,743		565,920
Other long-term liabilities	29,544		29,359
Total liabilities	723,458		729,069
Commitments and contingencies (see Note 12)
Stockholders’ equity:
Common stock	71		70
Treasury stock, at cost	(330)		(330)
Accumulated other comprehensive income	(1,433)		(5,851)
Additional paid-in capital	1,194,719		1,203,145
Accumulated deficit	(299,012)		(354,286)
Total stockholders’ equity	894,015		842,748
Total liabilities and stockholders' equity	$	1,617,473	$	1,571,817

See notes to condensed consolidated financial statements.

1

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited, in thousands, except per share data)

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue	$	169,406	$	165,147	$	349,510	$	324,767
Cost of revenue	66,716		66,158		136,465		131,636
Gross profit	102,690		98,989		213,045		193,131
Operating expenses:
Research and development	35,537		35,455		74,369		70,925
Selling, general and administrative	31,249		30,963		64,189		62,566
Total operating expenses	66,786		66,418		138,558		133,491
Income from operations	35,904		32,571		74,487		59,640
Other income (expense):
Interest income (expense), net	1,634		(1,389)		2,236		(3,082)
Other (expense) income, net	(123)		(55)		(178)		114,853
Total other income (expense), net	1,511		(1,444)		2,058		111,771
Income before income taxes	37,415		31,127		76,545		171,411
Income tax expense	11,660		1,569		21,271		3,026
Net income	$	25,755	$	29,558	$	55,274	$	168,385
Net income per share:
Income per share - Basic	$	0.36	$	0.42	$	0.78	$	2.42
Income per share - Diluted	$	0.36	$	0.42	$	0.77	$	2.37
Weighted average shares used:
Basic	70,799		69,788		70,640		69,594
Diluted	71,402		71,107		71,388		71,166

See notes to condensed consolidated financial statements.

2

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited, in thousands)

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Net income	$	25,755	$	29,558	$	55,274	$	168,385
Unrealized gain (loss) on short term investments, net of tax	833		(2,335)		3,380		(2,952)
Foreign currency translation gain (loss), net of tax	301		(679)		1,038		(1,003)
Other comprehensive income (loss), net of tax	1,134		(3,014)		4,418		(3,955)
Total comprehensive income	$	26,889	$	26,544	$	59,692	$	164,430

See notes to condensed consolidated financial statements.

3

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited, in thousands)

	Three Months Ended
							Accumulated Other Comprehensive Income		Additional Paid-in Capital		Accumulated Deficit		Total Stockholders’ Equity
	Common Stock			Treasury Stock
	Shares	Amount		Shares	Amount
Balance as of December 30, 2022	70,757	$	71	(23)	$	(330)	$	(2,567)	$	1,190,137	$	(324,767)	$	862,544
Vesting of restricted common stock and units	212	—		—	—		—		—		—		—
Shares repurchased for tax withholdings on restricted stock awards	(72)	—		—	—		—		(4,878)		—		(4,878)
Share-based compensation	—	—		—	—		—		9,460		—		9,460
Other comprehensive income, net of tax	—	—		—	—		1,134		—		—		1,134
Net income	—	—		—	—		—		—		25,755		25,755
Balance as of March 31, 2023	70,897	$	71	(23)	$	(330)	$	(1,433)	$	1,194,719	$	(299,012)	$	894,015

	Six Months Ended
							Accumulated Other Comprehensive Income		Additional Paid-in Capital		Accumulated Deficit		Total Stockholders’ Equity
	Common Stock			Treasury Stock
	Shares	Amount		Shares	Amount
Balance as of September 30, 2022	70,022	$	70	(23)	$	(330)	$	(5,851)	$	1,203,145	$	(354,286)	$	842,748
Vesting of restricted common stock and units	1,338	1		—	—		—		—		—		1
Issuance of common stock pursuant to employee stock purchase plan	52	—		—	—		—		2,320		—		2,320
Shares repurchased for tax withholdings on equity awards	(515)	—		—	—		—		(31,253)		—		(31,253)
Share-based compensation	—	—		—	—		—		20,507		—		20,507
Other comprehensive income, net of tax	—	—		—	—		4,418		—		—		4,418
Net income	—	—		—	—		—		—		55,274		55,274
Balance as of March 31, 2023	70,897	$	71	(23)	$	(330)	$	(1,433)	$	1,194,719	$	(299,012)	$	894,015

See notes to condensed consolidated financial statements.

4

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited, in thousands)

	Three Months Ended
							Accumulated Other Comprehensive Income		Additional Paid-in Capital		Accumulated Deficit		Total Stockholders’ Equity
	Common Stock			Treasury Stock
	Shares	Amount		Shares	Amount
Balance as of December 31, 2021	69,709	$	70	(23)	$	(330)	$	3,209	$	1,177,239	$	(655,414)	$	524,774
Vesting of restricted common stock and units	315	—		—	—		—		—		—		—
Shares repurchased for tax withholdings on equity awards	(114)	—		—	—		—		(7,002)		—		(7,002)
Share-based compensation	—	—		—	—		—		9,967		—		9,967
Other comprehensive loss, net of tax	—	—		—	—		(3,014)		—		—		(3,014)
Net income	—	—		—	—		—		—		29,558		29,558
Balance as of April 1, 2022	69,910	$	70	(23)	$	(330)	$	195	$	1,180,204	$	(625,856)	$	554,283

	Six Months Ended
							Accumulated Other Comprehensive Income		Additional Paid-in Capital		Accumulated Deficit		Total Stockholders’ Equity
	Common Stock			Treasury Stock
	Shares	Amount		Shares	Amount
Balance as of October 1, 2021	68,877	$	69	(23)	$	(330)	$	4,150	$	1,269,601	$	(801,754)	$	471,736
Stock option exercises	190	—		—	—		—		2,688		—		2,688
Vesting of restricted common stock and units	1,284	1		—	—		—		—		—		1
Issuance of common stock pursuant to employee stock purchase plan	56	—		—	—		—		2,447		—		2,447
Shares repurchased for tax withholdings on equity awards	(497)	—		—	—		—		(34,758)		—		(34,758)
Share-based compensation	—	—		—	—		—		19,916		—		19,916
Other comprehensive loss, net of tax	—	—		—	—		(3,955)		—		—		(3,955)
Cumulative-effect adjustment from adoption of ASU 2020-06	—	—		—	—		—		(79,690)		7,513		(72,177)
Net income	—	—		—	—		—		—		168,385		168,385
Balance as of April 1, 2022	69,910	$	70	(23)	$	(330)	$	195	$	1,180,204	$	(625,856)	$	554,283

See notes to condensed consolidated financial statements.

5

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in thousands)

	Six Months Ended
	March 31, 2023		April 1, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	55,274	$	168,385
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and intangibles amortization	25,365		29,080
Share-based compensation	20,507		19,916
Deferred income taxes	20,233		1,284
Gain on equity method investment, net	—		(114,908)
Other adjustments, net	(2,784)		1,176
Change in operating assets and liabilities:
Accounts receivable	(18,316)		(15,983)
Inventories	(8,236)		(10,653)
Prepaid expenses and other assets	(2,857)		597
Accounts payable	(253)		1,632
Accrued and other liabilities	(17,471)		(4,930)
Income taxes	(715)		1,001
Net cash provided by operating activities	70,747		76,597
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of business, net of cash acquired	(50,835)		—
Proceeds from sale of equity method investment	—		127,750
Purchases of property and equipment	(15,614)		(12,184)
Proceeds from sale of property and equipment	8,000		23
Proceeds from sales and maturities of short-term investments	261,634		91,841
Purchases of short-term investments	(228,157)		(282,642)
Net cash used in investing activities	(24,972)		(75,212)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on finance leases and other	(591)		(500)
Proceeds from stock option exercises and employee stock purchases	2,320		5,135
Repurchase of common stock - tax withholdings on equity awards	(31,253)		(34,758)
Net cash used in financing activities	(29,524)		(30,123)
Foreign currency effect on cash	370		(224)
NET CHANGE IN CASH AND CASH EQUIVALENTS	16,621		(28,962)
CASH AND CASH EQUIVALENTS — Beginning of period	119,952		156,537
CASH AND CASH EQUIVALENTS — End of period	$	136,573	$	127,575

See notes to condensed consolidated financial statements.

6

MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1.BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Unaudited Interim Financial Information—The accompanying unaudited, condensed consolidated financial statements have been prepared according to the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (the “SEC”) and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of the condensed consolidated balance sheets, condensed consolidated statements of operations, comprehensive income, stockholders' equity and cash flows of MACOM Technology Solutions Holdings, Inc. (“MACOM”, the “Company”, “us”, “we” or “our”) for the periods presented. We prepare our interim financial information using the same accounting principles we use for our annual audited consolidated financial statements. Certain information and note disclosures normally included in the annual audited consolidated financial statements have been condensed or omitted in accordance with prescribed SEC rules. We believe that the disclosures made in our condensed consolidated financial statements and the accompanying notes are adequate to make the information presented not misleading.

The condensed consolidated balance sheet as of September 30, 2022 is as reported in our audited consolidated financial statements as of that date. Our accounting policies are described in the notes to our September 30, 2022 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 30, 2022 filed with the SEC on November 14, 2022 (the “2022 Annual Report on Form 10-K”). We recommend that the financial statements included in this Quarterly Report on Form 10-Q be read in conjunction with the consolidated financial statements and notes included in our 2022 Annual Report on Form 10-K.

Principles of Consolidation, Basis of Presentation and Reclassification—The accompanying condensed consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. In the condensed consolidated financial statements, certain balances have been reclassified to conform to the current year presentation.

We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. Fiscal years 2023 and 2022 each include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first fiscal quarter.

Use of Estimates—The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions. The accounting policies which our management believes involve the most significant application of judgment or involve complex estimation, are inventories and associated reserves; revenue reserves; goodwill and intangible asset valuation; share-based compensation valuations and income taxes.

Recent Accounting Pronouncements—Our Recent Accounting Pronouncements are described in our 2022 Annual Report on Form 10-K.

Pronouncements for Adoption in Subsequent Periods

The FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, amended by ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which provides optional expedients and exceptions to applying the guidance on contract modifications, hedge accounting, and other transactions, to simplify the accounting for transitioning from the London Interbank Offered Rate, and other interbank offered rates expected to be discontinued, to alternative reference rates. The guidance in this update was effective upon its issuance. If elected, the guidance is to be applied prospectively through December 31, 2024. We are currently evaluating the effect the potential adoption of this ASU will have on our consolidated financial statements, including, but not limited to, our Credit Agreement (defined below). For additional information regarding our Credit Agreement, refer to Note 9 - Debt.

2. REVENUE

Disaggregation of Revenue

We disaggregate revenue from contracts with customers by markets and geography, as we believe it best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors.

7

The following tables present our revenue disaggregated by markets and geography (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Market:
Telecommunications	$	53,888	$	62,927	$	115,337	$	118,749
Industrial & Defense	77,194		67,139		154,363		140,285
Data Center	38,324		35,081		79,810		65,733
Total	$	169,406	$	165,147	$	349,510	$	324,767

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Geographic Region:
United States	$	82,835	$	74,547	$	171,423	$	148,973
China	33,325		46,028		74,481		82,091
Asia Pacific, excluding China (1)	28,008		25,881		49,542		56,531
Other Countries (2)	25,238		18,691		54,064		37,172
Total	$	169,406	$	165,147	$	349,510	$	324,767

(1)Asia Pacific primarily represents Australia, Japan, Malaysia, Singapore, South Korea, Taiwan and Thailand.

(2)No country or region represented greater than 10% of our total revenue as of the dates presented, other than the United States, China and Asia Pacific region as presented above.

Contract Balances

We record contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis. Our contract liabilities primarily relate to deferred revenue, including advanced consideration received from customers for contracts prior to the transfer of control to the customer, and therefore revenue is subsequently recognized upon delivery of products and services.

The following table presents the changes in contract liabilities during the six months ended March 31, 2023 (in thousands, except percentage):

	March 31, 2023		September 30, 2022		$ Change		% Change
Contract liabilities	$	1,076	$	3,916	$	(2,840)	(73)	%

During the three and six months ended March 31, 2023, we recognized sales of $1.4 million and $2.9 million, respectively, that were included in the contract liabilities balance as of the beginning of the period. The decrease in contract liabilities during the six months ended March 31, 2023 was primarily related to recognition of revenue that was previously deferred for products and services invoiced prior to when certain of our customers obtained control of such products and/or services.

3. ACQUISITIONS

Acquisition of Linearizer Technology Inc.— On March 3, 2023, we completed the acquisition of Linearizer Technology, Inc. (“Linearizer”), a developer of modules and subsystems, including solid state amplifiers (SSPAs), microwave predistortion linearizers and microwave photonics (the “Linearizer Acquisition”). We acquired Linearizer to further strengthen our component and subsystem design expertise in our target markets. In connection with the Linearizer Acquisition, we acquired all of the outstanding shares of Linearizer for total cash consideration of approximately $51.6 million, subject to customary purchase price adjustments. We funded the Linearizer Acquisition with cash-on-hand. During the three and six months ended March 31, 2023, we incurred acquisition-related transaction costs of approximately $1.9 million, which are included in selling, general and administrative expense. There were no transaction costs for the three and six months ended April 1, 2022. The Linearizer Acquisition was accounted for as a business combination and the operations of Linearizer have been included in our consolidated financial statements since the date of acquisition.

The purchase price for the Linearizer Acquisition has been allocated based on preliminary estimates of fair values of the acquired assets and assumed liabilities at the date of acquisition as follows (in thousands):

8

	At Acquisition Date as Reported March 31, 2023
Current assets	$	11,726
Property and equipment	5,485
Intangible assets	29,600
Goodwill	12,332
Total assets acquired	59,143
Current liabilities	7,544
Total liabilities assumed	7,544
Purchase Price	$	51,599

We recorded goodwill of $12.3 million. Intangible assets consist of customer relationships of $20.7 million with an 8.6 year life, technology of $7.1 million with a 7.6 year life and a trade name of $1.8 million with a 7.6 year life. We used the income approach to determine the fair value of the definite-lived intangible assets and the cost and market approaches to determine the fair value of our property, plant and equipment. We amortize definite-lived assets based on the pattern over which we expect to receive the economic benefit from these assets. The intangible assets and goodwill acquired will be amortizable for tax purposes due to the Section 338 election filed.

The determination and allocation of purchase price consideration is based on preliminary estimates of fair value; such estimates and assumptions are subject to change within the measurement period (up to one year from the acquisition date). As of March 31, 2023, the purchase price allocation for Linearizer remains open as we gather additional information regarding the assets acquired and the liabilities assumed, primarily in relation to the valuation of intangibles, inventory, fixed assets, leases and contingencies.

Pro forma financial information for the three and six months ended March 31, 2023 and April 1, 2022 and the actual results of operations for Linearizer since the acquisition date are not material to our condensed consolidated financial statements for the periods presented.

On March 3, 2023, we entered into a lease agreement with an entity that is majority-owned by certain former Linearizer employees, which is deemed to be a related party agreement. We have the option to purchase the facility for $3.8 million. As of the date of this Quarterly Report on Form 10-Q, we have not exercised such right. During the three months ended March 31, 2023, we made lease-related payments of $0.2 million. This lease is classified as a finance lease on our condensed consolidated balance sheet and is included in property and equipment of $5.5 million in the purchase price allocation table above.

Other Acquisition— On December 23, 2022, we entered into a definitive agreement to acquire substantially all of the assets and certain specified liabilities of OMMIC SAS, a semiconductor manufacturer based in France with expertise in wafer fabrication, epitaxial growth and monolithic microwave integrated circuit semiconductor processing and integrated circuit design. The purchase price is expected to be approximately €38.5 million, funded by cash-on-hand, and the proposed transaction is expected to close in our fiscal year 2023, subject to regulatory and other government approvals and the satisfaction of certain closing conditions.

4. INVESTMENTS

All investments are short-term in nature and are invested in corporate bonds and commercial paper and are classified as available-for-sale. These corporate bonds and commercial paper are owned directly by the Company and are segregated in brokerage custody accounts. The amortized cost, gross unrealized holding gains or losses and fair value of our available-for-sale investments by major investment type are summarized in the tables below (in thousands):

	March 31, 2023
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	140,151	$	27	$	(2,999)	$	137,179
Commercial paper	303,871		25		(340)		303,556
Total short-term investments	$	444,022	$	52	$	(3,339)	$	440,735

9

	September 30, 2022
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	146,163	$	5	$	(4,492)	$	141,676
Commercial paper	326,318		—		(1,414)		324,904
Total short-term investments	$	472,481	$	5	$	(5,906)	$	466,580

The contractual maturities of available-for-sale investments were as follows (in thousands):

	March 31, 2023		September 30, 2022
Less than one year	$	347,944	$	368,141
Over one year	92,791		98,439
Total available-for-sale investments	$	440,735	$	466,580

We have determined that the gross unrealized losses on available for sale securities as of March 31, 2023 and September 30, 2022 are temporary in nature and/or do not relate to credit loss, and therefore there is no expense for credit losses recorded in our condensed consolidated statements of operations. Unrealized gains and losses on available-for-sale investments are reported as a separate component of stockholders’ equity within accumulated other comprehensive income.

During the three months ended March 31, 2023 and April 1, 2022, Interest income (expense), net included interest income on short-term investments of $5.1 million and $0.5 million, respectively. During the six months ended March 31, 2023 and April 1, 2022, Interest income (expense), net included interest income on short-term investments of $8.7 million and $0.8 million, respectively.

Other Investments — As of March 31, 2023, we held a non-marketable equity investment in Series B preferred stock of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. As the equity securities do not have a readily determinable fair value and do not qualify for the practical expedient under Accounting Standards Codification 820, Fair Value Measurement, we have elected to account for this investment at cost less any impairment. We evaluate this investment for impairment at each balance sheet date. As of March 31, 2023 and September 30, 2022, the carrying value of this investment was $2.5 million and it was classified as a long-term investment.

On December 23, 2021, we sold our non-controlling investment of less than 10% in the outstanding equity of a private company to one of the other limited liability company members, pursuant to the terms of a previously negotiated call option included in the private company’s limited liability company agreement, as amended and restated (the “LLC Agreement”), in exchange for a predetermined fixed price as set forth in the LLC Agreement of approximately $127.8 million in cash consideration. As of December 23, 2021, the carrying value of this investment was approximately $9.5 million. As a result of this transaction, during the three months ended December 31, 2021, we recorded a gain of $118.2 million in Other (expense) income, net in our condensed consolidated statements of operations. The six months ended April 1, 2022 includes a gain on the sale of our equity method investment of $118.2 million, and we recorded net losses of $3.3 million associated with such equity method investment.

5. FAIR VALUE

We group our financial assets and liabilities measured at fair value on a recurring basis in three levels, based on the markets in which the assets and liabilities are traded, and the reliability of the assumptions used to determine fair value. These levels are:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less active markets), or model-driven valuations in which all significant inputs are observable or can be derived principally from, or corroborated with, observable market data.

Level 3 - Fair value is derived from valuation techniques in which one or more significant inputs are unobservable, including assumptions and judgments made by us.

Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis

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We measure certain assets and liabilities at fair value on a recurring basis such as our financial instruments. There have been no transfers between Level 1, 2 or 3 assets or liabilities during the three and six months ended March 31, 2023.

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):

	March 31, 2023
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	20,570	$	20,570	$	—	$	—
Commercial paper	303,556		—		303,556		—
Corporate bonds	137,179		—		137,179		—
Total assets measured at fair value	$	461,305	$	20,570	$	440,735	$	—

	September 30, 2022
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	1,392	$	1,392	$	—	$	—
Commercial paper	324,904		—		324,904		—
Corporate bonds	141,676		—		141,676		—
Total assets measured at fair value	$	467,972	$	1,392	$	466,580	$	—

6. INVENTORIES

Inventories consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Raw materials	$	83,057	$	72,595
Work-in-process	16,990		12,455
Finished goods	31,835		29,910
Total inventory, net	$	131,882	$	114,960

7. PROPERTY AND EQUIPMENT

Property and equipment consists of the following (in thousands):

	March 31, 2023		September 30, 2022
Construction in process	$	14,318	$	10,837
Machinery and equipment	229,125		227,844
Leasehold improvements	35,288		35,651
Furniture and fixtures	2,601		2,535
Computer equipment and software	18,519		18,347
Finance lease assets	38,238		34,417
Total property and equipment	338,089		329,631
Less accumulated depreciation and amortization	(214,823)		(205,930)
Property and equipment, net	$	123,266	$	123,701

Depreciation and amortization expense related to property and equipment for the three and six months ended March 31, 2023 was $5.8 million and $11.8 million, respectively. Depreciation and amortization expense related to property and equipment for the three and six months ended April 1, 2022 was $5.8 million and $11.7 million, respectively. Accumulated amortization on finance lease assets as of March 31, 2023 and September 30, 2022 was $6.7 million and $5.8 million, respectively.

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8. INTANGIBLE ASSETS

Amortization expense related to intangible assets is as follows (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	988	$	1,778	$	1,898	$	4,283
Selling, general and administrative	5,764		6,276		11,667		13,058
Total	$	6,752	$	8,054	$	13,565	$	17,341

Intangible assets consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Acquired technology	$	186,534	$	179,434
Customer relationships	266,570		245,870
Trade name	5,200		3,400
Total	458,304		428,704
Less accumulated amortization	(391,015)		(377,450)
Intangible assets — net	$	67,289	$	51,254

A summary of the activity in gross intangible assets and goodwill is as follows (in thousands):

	Intangible Assets
	Total Intangible Assets		Acquired Technology		Customer Relationships		Trade Name		Goodwill
Balance as of September 30, 2022	$	428,704	$	179,434	$	245,870	$	3,400	$	311,417
Acquired	29,600		7,100		20,700		1,800		12,332
Currency translation adjustment	—		—		—		—		861
Balance as of March 31, 2023	$	458,304	$	186,534	$	266,570	$	5,200	$	324,610

As of March 31, 2023, our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands):

	2023 Remaining		2024	2025	2026	2027	Thereafter	Total
Amortization expense	$	14,295	18,643	7,381	6,397	5,842	11,331	$	63,889

Accumulated amortization for acquired technology and customer relationships were $177.1 million and $213.9 million, respectively, as of March 31, 2023, and $175.2 million and $202.3 million, respectively, as of September 30, 2022.

9. DEBT

The following represents the outstanding balances and effective interest rates of our borrowings as of March 31, 2023 and September 30, 2022, (in thousands, except percentages):

	March 31, 2023				September 30, 2022
	Principal Balance		Effective Interest Rate		Principal Balance		Effective Interest Rate
LIBOR plus 2.25% term loans due May 2024	$	120,766	6.88	%	$	120,766	4.77	%
0.25% convertible notes due March 2026	450,000		0.54	%	450,000		0.54	%
Total principal amount outstanding	570,766				570,766
Less: Unamortized discount on term loans and deferred financing costs	(4,023)				(4,846)
Total long-term debt	$	566,743			$	565,920

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Term Loans

As of March 31, 2023, we are party to a credit agreement, dated as of May 8, 2014, with a syndicate of lenders and Goldman Sachs Bank USA, as administrative agent (as amended on February 13, 2015, August 31, 2016, March 10, 2017, May 19, 2017, May 2, 2018 and May 9, 2018, the “Credit Agreement”).

As of March 31, 2023, the Credit Agreement consisted of term loans with an initial aggregate principal amount of $700.0 million (the “Term Loans”) that will mature in May 2024 and bear interest at: (i) for LIBOR loans for any interest period, a rate per annum equal to the LIBOR rate as determined by the administrative agent, plus an applicable margin of 2.25%; and (ii) for base rate loans, a rate per annum equal to the greater of (a) the prime rate quoted in the print edition of the Wall Street Journal, Money Rates Section, (b) the federal funds rate plus one-half of 1.00% and (c) the LIBOR rate applicable to a one-month interest period plus 1.00% (but, in each case, not less than 1.00%), plus an applicable margin of 1.25%. The UK Financial Conduct Authority announced that they will cease publishing certain tenors of USD LIBOR on June 30, 2023; we expect our interest rate to change to synthetic USD LIBOR during the third quarter of fiscal year 2023.

As of March 31, 2023, there are no minimum principal repayments on the Term Loans until May 2024 when the remaining principal balance of $120.8 million becomes due. The fair value of the Term Loans was estimated to be approximately $120.3 million and $120.2 million as of March 31, 2023 and September 30, 2022, respectively, and was determined using Level 2 inputs, including a quoted price from a financial institution.

As of March 31, 2023, approximately $0.4 million of deferred financing costs remain unamortized related to the Term Loans and is recorded as a direct reduction of the recognized debt liabilities in our accompanying condensed consolidated balance sheet.

The Term Loans are secured by a first priority lien on substantially all of our assets and provide that we must comply with certain financial and non-financial covenants.

2026 Convertible Notes

On March 25, 2021, we issued 0.25% convertible senior notes due in fiscal year 2026, pursuant to an indenture dated as of such date (the “Indenture”), between the Company and U.S. Bank National Association, as trustee, with an aggregate principal amount of $400.0 million (the “Initial Notes”), and on April 6, 2021, we issued an additional $50.0 million aggregate principal amount (the “Additional Notes”) (together, the “2026 Convertible Notes”). The aggregate principal balance of the 2026 Convertible Notes is $450.0 million. The 2026 Convertible Notes will mature on March 15, 2026, unless earlier converted, redeemed or repurchased.

The Additional Notes were issued and sold to the initial purchaser of the Initial Notes, pursuant to the option to purchase the Additional Notes granted by the Company to the initial purchaser and have the same terms as the Initial Notes.

Holders of the 2026 Convertible Notes may convert their notes at their option at any time prior to the close of business on the business day immediately preceding December 15, 2025 in multiples of $1,000 principal amount, only under the following circumstances: (i) during any fiscal quarter commencing after the fiscal quarter ending on July 2, 2021 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the notes on each applicable trading day; (ii) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the “trading price” (as defined in the Indenture) per $1,000 principal amount of the notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate for the notes on each such trading day; (iii) if we call such notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the applicable redemption date; or (iv) upon the occurrence of specified corporate events described in the Indenture. On or after December 15, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes in multiples of $1,000 principal amount, regardless of the foregoing circumstances.

The initial conversion rate for the 2026 Convertible Notes is 12.1767 shares of common stock per $1,000 principal amount of the notes, equivalent to an initial conversion price of approximately $82.12 per share of common stock. The conversion rate will be subject to adjustment upon the occurrence of certain specified events in the Indenture.

In November 2021, we made an irrevocable election to pay cash for the aggregate principal amount of notes to be converted. Upon conversion of the 2026 Convertible Notes, we are required to pay cash up to the aggregate principal amount of the notes to be converted and 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, in respect of the remainder, if any, of our conversion obligation in excess of the aggregate principal amount of the notes being converted (subject to, and in accordance with, the settlement provisions of the Indenture). We may not redeem the notes prior to March 20, 2024. We may redeem for cash all or any portion of the notes, at

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our option, on or after March 20, 2024 if the last reported sale price per share of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which we provide notice of redemption, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption, at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, to, but not including, the redemption date.

The Indenture does not contain any financial or operating covenants or restrictions on the payments of dividends, the making of investments, the incurrence of indebtedness or the purchase or prepayment of securities by us or any of our subsidiaries.

In connection with the adoption of ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, on October 2, 2021 we reclassified $72.2 million, consisting of $73.1 million of principal and issuance costs of $0.9 million, previously allocated to the conversion feature, from additional paid-in capital to long-term debt on our condensed consolidated balance sheet as of October 2, 2021. The reclassification was recorded to combine the two legacy units of account into a single instrument classified as a liability. We also recognized a cumulative effect adjustment of $7.5 million to accumulated deficit on our condensed consolidated balance sheet as of October 2, 2021, that was primarily driven by the derecognition of interest expense related to the accretion of the Debt Discount as required under the legacy accounting guidance. Under ASU 2020-06, we will no longer incur non-cash interest expense related to the accretion of the debt discount associated with the embedded conversion option.

For the three and six months ended March 31, 2023, total interest expense for the 2026 Convertible Notes was $0.3 million and $0.6 million, respectively. For the three and six months ended April 1, 2022, total interest expense for the 2026 Convertible Notes was $0.3 million and $0.6 million, respectively.

The fair value of our 2026 Convertible Notes, including the conversion feature, was $472.5 million and $411.4 million as of March 31, 2023 and September 30, 2022, respectively, and was determined based on quoted prices in markets that are not active, which is considered a Level 2 valuation input.

There are no future minimum principal payments under the notes as of March 31, 2023; the full amount of $450.0 million is due in fiscal year 2026.

10. FINANCING OBLIGATION

We are party to a power purchase agreement for the use of electric power and thermal energy producing systems at our fabrication facility in Lowell, Massachusetts. These systems are expected to reduce our consumption of energy while delivering sustainable, resilient energy for heating and cooling. We do not own these systems; however, we control the use of the assets during operation. As of March 31, 2023 and September 30, 2022, the net book value of the systems in Property and equipment, net was $9.2 million and $9.8 million, respectively, and the corresponding liability was $9.7 million and $9.8 million, respectively, primarily classified in Financing obligation on our condensed consolidated balance sheet. The financing obligation was calculated based on future fixed payments allocated to the power generator of $16.8 million over the 15-year term, discounted at an implied discount rate of 7.4%, and the remaining future minimum payments are for power purchases. In total, we have $27.2 million in fixed payments associated with the power purchase agreement, which has a 15-year term.

As of March 31, 2023, expected future minimum payments for the financing obligation were as follows (in thousands):

Fiscal year ending:	Amount
2023	$	468
2024	958
2025	982
2026	1,007
2027	1,031
Thereafter	11,914
Total payments	$	16,360
Less: interest	6,688
Present value of liabilities	$	9,672

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11. EARNINGS PER SHARE

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

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Numerator:
Net income attributable to common stockholders	$	25,755	$	29,558	$	55,274	$	168,385
Denominator:
Weighted average common shares outstanding-basic	70,799		69,788		70,640		69,594
Dilutive effect of stock options, restricted stock and restricted stock units	603		1,319		748		1,572
Weighted average common shares outstanding-diluted	71,402		71,107		71,388		71,166
Net income to common stockholders per share-Basic:	$	0.36	$	0.42	$	0.78	$	2.42
Net income to common stockholders per share-Diluted:	$	0.36	$	0.42	$	0.77	$	2.37

The 2026 Convertible Notes did not have an impact on diluted net income per share for the three and six months ended March 31, 2023 or April 1, 2022.

12. COMMITMENTS AND CONTINGENCIES

From time to time, we may be subject to commercial disputes, employment issues, claims by other companies in the industry that we have infringed their intellectual property rights and other similar claims and litigation. Any such claims may lead to future litigation and material damages and defense costs. We were not involved in any material pending legal proceedings during the three and six months ended March 31, 2023.

13. STOCKHOLDERS’ EQUITY AND SHARE-BASED COMPENSATION

We have authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of March 31, 2023.

Stock Plans

As of March 31, 2023, we had 4.6 million shares available for issuance under our 2021 Omnibus Incentive Plan (the “2021 Plan”), which replaced our 2012 Omnibus Incentive Plan (as amended and restated) (the “2012 Plan”), and 1.3 million shares available for issuance under our 2021 Employee Stock Purchase Plan (the “Employee Stock Purchase Plan”), which replaced our 2012 Employee Stock Purchase Plan. We have outstanding awards under the 2021 Plan and the 2012 Plan. Following the adoption of the 2021 Plan, no additional awards have been or will be made under the 2012 Plan. Under the 2021 Plan, we have the ability to issue incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), stock appreciation rights (“SARs”), restricted stock awards (“RSAs”), unrestricted stock awards, stock units (including restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”)), performance awards, cash awards, and other share-based awards to employees, directors, consultants and advisors. The ISOs and NSOs must be granted at an exercise price, and the SARs must be granted at a base value, per share of not less than 100% of the closing price of a share of our common stock on the date of grant (or, if no closing price is reported on that date, the closing price on the immediately preceding date on which a closing price was reported) (110% in the case of certain ISOs). Options granted under the 2012 Plan primarily vested based on certain market-based and performance-based criteria and generally have a term of four years to seven years. Certain of the share-based awards granted and outstanding as of March 31, 2023 are subject to accelerated vesting upon a change in control of the Company.

Incentive Stock Units

Aside from the equity plans described above, we also grant incentive stock units (“ISUs”) to certain of our international employees which typically vest over three or four years and for which the fair value is determined by our underlying stock price, which are classified as liabilities and settled in cash upon vesting.

As of March 31, 2023 and September 30, 2022, the fair value of outstanding ISUs was $4.5 million and $4.9 million, respectively, and the associated accrued compensation liability was $2.1 million and $3.6 million, respectively. During the three and six months ended March 31, 2023, we recorded an expense for ISU awards of $0.5 million and $1.8 million, respectively.

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During the three and six months ended April 1, 2022, we recorded a benefit for ISU awards of $0.9 million and expense of $0.6 million, respectively. These expenses are not included in the share-based compensation expense totals below.

Share-Based Compensation

The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	1,011	$	1,073	$	2,161	$	2,106
Research and development	3,742		3,511		7,974		7,110
Selling, general and administrative	4,707		5,383		10,372		10,700
Total share-based compensation expense	$	9,460	$	9,967	$	20,507	$	19,916

As of March 31, 2023, the total unrecognized compensation costs related to RSAs, RSUs and PRSUs was $70.4 million, which we expect to recognize over a weighted-average period of 2.1 years. As of March 31, 2023, total unrecognized compensation cost related to our Employee Stock Purchase Plan was $0.3 million.

Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Unit Awards

A summary of stock award activity for the six months ended March 31, 2023 is as follows:

	Number of shares (in thousands)	Weighted- Average Grant Date Fair Value
Balance as of September 30, 2022	1,872	$	40.44
Granted	751	63.25
Performance-based adjustment (1)	311	27.13
Vested and released	(1,338)	28.11
Forfeited, canceled or expired	(39)	47.46
Balance as of March 31, 2023	1,557	$	59.23

(1) The amount shown represents performance adjustments for performance-based awards. These were granted in prior fiscal years and vested during the six months ended March 31, 2023 based on the Company’s achievement of adjusted earnings per share performance conditions.

Stock awards that vested during the six months ended March 31, 2023 and April 1, 2022 had combined fair values of $81.3 million and $89.3 million, respectively, as of the vesting date. RSUs granted generally vest over a period of three or four years.

We granted 166,452 market-based PRSUs during the six months ended March 31, 2023, at a weighted average grant date fair value of $80.38 per share, and none were forfeited. Recipients may earn between 0% and 200% of the target number of shares based on the Company’s achievement of total stockholder return in comparison to a peer group of companies in the PHLX Semiconductor Sector Index (^SOX) over a period of approximately 3 years. The fair value of the awards was estimated using a Monte Carlo simulation and compensation expense is recognized ratably over the service period based on the grant date fair value of the awards subject to the market condition. The expected volatility of the Company’s common stock was estimated based on the historical average volatility rate over the three-year period. The dividend yield assumption was based on historical and anticipated dividend payouts. The risk-free rate assumption was based on observed interest rates consistent with the three-year measurement period. The assumptions used to value the awards are as follows:

	Six Months Ended
	March 31, 2023
Grant date stock price	$	56.15
Average stock price at the start of the performance period	$	54.12
Risk free interest rate	4.2%
Years to maturity	2.90
Expected volatility rate	52.4%
Expected dividend yield	—

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Stock Options

As of March 31, 2023 and December 30, 2022, there were 15,000 stock options outstanding with a weighted-average exercise price per share of $16.06. As of March 31, 2023, the weighted-average remaining contractual term was 2.60 years and the aggregate intrinsic value was $0.8 million. Aggregate intrinsic value is calculated using the difference between our closing stock price on March 31, 2023 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $11.0 million for the six months ended April 1, 2022. There were no options exercised during the three and six months ended March 31, 2023 and three months ended April 1, 2022, respectively.

14. INCOME TAXES

We are subject to income tax in the U.S. as well as other tax jurisdictions in which we conduct business. Earnings from non-U.S. activities are subject to local country income tax and may also be subject to current U.S. income tax. For interim periods, we record a tax provision or benefit based upon the estimated effective tax rate expected for the full fiscal year, adjusted for material discrete taxation matters arising during the interim periods. Our quarterly tax provision or benefit, and its quarterly estimate of the annual effective tax rate, are subject to significant variation due to several factors. These factors include items such as: variability in accurately predicting pre-tax income/loss, the mix of jurisdictions in which we operate, intercompany transactions, changes in how we do business, tax law developments, the realizability of our deferred tax assets and related valuation allowance and relative changes in permanent tax benefits or expenses.

The provision for income taxes and effective income tax rate are as follows (in thousands, except percentages):

	Three Months Ended						Six Months Ended
	March 31, 2023			April 1, 2022			March 31, 2023			April 1, 2022
Income tax expense	$	11,660		$	1,569		$	21,271		$	3,026
Effective income tax rate	31.2		%	5.0		%	27.8		%	1.8		%

The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended March 31, 2023 was primarily driven by tax on global intangible low-taxed income (“GILTI”) including changes to Section 174, non-deductible compensation and state income taxes partially offset by income taxed in foreign jurisdictions generally at lower tax rates and research and development (“R&D”) tax credits. The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended April 1, 2022 was primarily driven by the full valuation allowance against any expense associated with income in the U.S. and income taxed in foreign jurisdictions generally at lower tax rates, where a valuation allowance does not apply.

On September 30, 2022, we released the majority of the valuation allowances against U.S. federal and state deferred tax assets including operating loss (“NOL”) carryforwards, R&D tax credit carryforwards and other deferred tax items relating to temporary differences. We continued our ongoing assessment of the realizability of our deferred tax assets and did not note any significant changes from our assessment on September 30, 2022. We continue to maintain a partial valuation allowance against certain of our deferred tax assets primarily relating to state NOLs and R&D tax credit carryforwards which are not expected to be realized. We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making this determination, we consider available positive and negative evidence. We look at factors that may impact the valuation of our deferred tax assets including results of recent operations, future reversals of existing taxable temporary differences, projected future taxable income and tax-planning strategies.

There were no unrecognized tax benefits as of March 31, 2023 and September 30, 2022. It is our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the fiscal quarter ended March 31, 2023, we did not make any accrual or payment of interest or penalties.

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15. SUPPLEMENTAL CASH FLOW INFORMATION

The following is a summary of supplemental cash flow information for the periods presented (in thousands):

	Six Months Ended
	March 31, 2023		April 1, 2022
Cash paid for interest	$	5,367	$	2,953
Cash paid for income taxes	$	1,701	$	695
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for new lease liabilities	$	3,920	$	2,306
Finance lease assets obtained in exchange for new lease liabilities	$	3,821	$	—
Additions to property and equipment, net included in liabilities	$	—	$	2,010

During the six months ended April 1, 2022, we capitalized $0.9 million of non-cash costs to property and equipment associated with construction of a power generator that were paid by our service provider and included in Additions to property and equipment, net included in liabilities above. See Note 10 - Financing Obligation.

16. GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION

We have one reportable operating segment that designs, develops, manufactures and markets semiconductors and modules. The determination of the number of reportable operating segments is based on the chief operating decision maker’s (“CODM”) use of financial information provided for the purposes of assessing performance and making operating decisions. The Company's CODM is its President and Chief Executive Officer. In evaluating financial performance and making operating decisions, the CODM primarily uses consolidated metrics. The Company assesses its determination of operating segments at least annually. We continue to evaluate our internal reporting structure and the potential impact of any changes on our segment reporting.

For information about our revenue in different geographic regions, based upon customer locations, see Note 2 - Revenue. Information about net property and equipment in different geographic regions is presented below (in thousands):

	March 31, 2023		September 30, 2022
United States	$	117,606	$	108,569
Other Countries (1)	5,660		15,132
Total	$	123,266	$	123,701

(1)Other than the United States, no country represented greater than 10% of the total net property and equipment as of the dates presented.

No customer represented more than 10% of revenue or more than 10% of accounts receivable in the periods presented in the accompanying condensed consolidated financial statements. For the three and six months ended March 31, 2023, our top ten customers represented 48% and 49%, respectively, of total revenue, and for the three and six months ended April 1, 2022, our top ten customers represented 48% and 45%, respectively, of total revenue.

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

The following discussion of our financial condition and results of operations should be read in conjunction with the condensed consolidated financial statements and the notes thereto included elsewhere in this Quarterly Report on Form 10-Q and our Annual Report on Form 10-K for the fiscal year ended September 30, 2022 filed with the United States Securities and Exchange Commission (“SEC”) on November 14, 2022 (the “2022 Annual Report on Form 10-K”).

In this document, the words “Company,” “we,” “our,” “us,” and similar terms refer only to MACOM Technology Solutions Holdings, Inc. and its consolidated subsidiaries, and not any other person or entity.

“MACOM,” “MACOM Technology Solutions,” and related logos are trademarks of MACOM Technology Solutions Holdings, Inc. All other brands and names listed are trademarks of their respective owners.

Cautionary Note Regarding Forward-Looking Statements

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This Item 2, “Management's Discussion and Analysis of Financial Condition and Results of Operations” and other sections of this Quarterly Report on Form 10-Q contain “forward-looking statements.” In addition, we may make other written and oral communications from time to time that contain such statements. Forward-looking statements include statements regarding our business outlook, strategic plans and priorities, expectations, anticipated drivers of future revenue growth, our ability to better address certain markets, expand our capabilities and extend our product offerings through the Linearizer Acquisition, our pending acquisition of OMMIC SAS, industry trends, the potential impacts of COVID-19 on our future operations and results, our estimated annual effective tax rate, our plans for use of our cash and cash equivalents and short-term investments, interest rate and foreign currency risks, our ability to meet working capital requirements, estimates and objectives for future operations, our future results of operations and our financial position, including liquidity, and other matters that do not relate strictly to historical facts. Forward-looking statements generally may be identified by terms such as “anticipates,” “believes,” “could,” “continue,” “estimates,” “expects,” “intends,” “may,” “plans,” “potential,” “predicts,” “projects,” “seeks,” “should,” “targets,” “will,” “would” or similar expressions or variations or the negatives of those terms. These statements are based on management's beliefs and assumptions as of the date of this Quarterly Report on Form 10-Q, based on information currently available to us. Such forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results to differ materially from future results expressed or implied by such forward-looking statements. Important factors that could cause actual results to differ materially from the forward-looking statements include, among others, the risks described in the section entitled “Risk Factors” in this Quarterly Report on Form 10-Q and the 2022 Annual Report on Form 10-K. We caution the reader to carefully consider such factors. Furthermore, such forward-looking statements speak only as of the date of this Quarterly Report on Form 10-Q. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements.

Overview

We design and manufacture semiconductor products for Telecommunications (“Telecom”), Industrial and Defense (“I&D”) and Data Center industries. Headquartered in Lowell, Massachusetts, with operational facilities throughout North America, Europe and Asia, we design, develop and manufacture differentiated semiconductor products for customers who demand high performance, quality and reliability. We have more than 70 years of application expertise, combined with expertise in analog and mixed signal circuit design, compound semiconductor fabrication (including gallium arsenide, gallium nitride, indium phosphide and specialized silicon), advanced packaging and back-end assembly and test. We offer a broad portfolio of thousands of standard and custom devices, which include integrated circuits (“IC”), multi-chip modules, diodes, amplifiers, switches and switch limiters, passive and active components and complete subsystems, across dozens of product lines serving over 6,000 end customers in three primary markets. Our semiconductor products are electronic components that our customers generally incorporate into larger electronic systems, such as wireless communication systems including basestations, high capacity optical networks, data center applications, radar, medical systems and test and measurement applications. Our primary end markets are: (1) Telecom, which includes carrier infrastructure such as long-haul/metro, 5G and Fiber-to-the-X/passive optical network, among others; (2) I&D, which includes military and commercial radar, radio frequency (“RF”) jammers, electronic countermeasures, communication data links, satellite communications and multi-market applications, which include industrial, medical, test and measurement and scientific applications; and (3) Data Center, which includes intra-Data Center, Data Center Interconnect applications, at 100G, 200G, 400G, 800G and higher speeds, enabled by our broad portfolio of analog ICs and photonic components for high speed optical module customers.

COVID-19 Impact

COVID-19 has spread throughout areas of the world where we operate and resulted in authorities implementing numerous measures to try to contain the virus. As a result of these measures and the spread of COVID-19, we have modified our business practices and may further modify our practices as required, or as we determine appropriate. While these measures, as well as other disruptions, have impacted our operations, the operations of our customers and those of our respective vendors and suppliers, such impacts did not, through the six months ended March 31, 2023, have a material impact on our consolidated operating results. However, the degree to which COVID-19 may impact our business, financial condition, results of operations, liquidity and cash flows will continue to depend on future developments, which remain highly uncertain and cannot be predicted.

For additional information on risk factors that could impact our future results, please refer to the section entitled “Risk Factors” in this Quarterly Report on Form 10-Q and the 2022 Annual Report on Form 10-K.

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Description of Our Revenue

Revenue. Our revenue is derived from sales of high-performance RF, microwave, millimeter wave, optical and photonic semiconductor products. We design, integrate, manufacture and package differentiated, semiconductor-based products that we sell to customers through our direct sales organization, our network of independent sales representatives and our distributors.

We believe the primary drivers of our future revenue growth will include:

•continued growth in the demand for high-performance analog, digital and optical semiconductors in our three primary markets;

•introducing new products using advanced technologies, added features, higher levels of integration and improved performance;

•increasing content of our semiconductor solutions in customers’ systems through cross-selling our product lines;

•leveraging our core strength and leadership position in standard, catalog products that service all of our end applications; and

•engaging early with our lead customers to develop custom and standard products.

Our core strategy is to develop and innovate high-performance products that address our customers’ most difficult technical challenges in our primary markets: Telecom, I&D and Data Center.

We expect our revenue in the Telecom market to be driven by 5G deployments, with continued upgrades and expansion of communications equipment, and increasing adoption of our high-performance RF, millimeter wave, optical and photonic components.

We expect our revenue in the I&D market to be driven by the expanding product portfolio that we offer which services applications such as test and measurement, satellite communications, civil and military radar, industrial, automotive, scientific and medical applications, further supported by growth in applications for our multi-market catalog products.

We expect our revenue in the Data Center market to be driven by the adoption of cloud-based services and the upgrade of data center architectures to 100G, 200G, 400G and 800G interconnects, which we expect will drive adoption of higher speed optical and photonic components.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations are based on our condensed consolidated financial statements. The preparation of financial statements, in conformity with GAAP, requires management to make estimates and judgments that affect the reported amounts of assets and liabilities, the reported amounts of revenue and expenses during the reporting period and disclosure of contingent assets and liabilities at the date of the financial statements. By their nature, these estimates and judgments are subject to an inherent degree of uncertainty and could be material if our actual or expected experience were to change unexpectedly. On an ongoing basis, we re-evaluate our estimates and judgments.

We base our estimates and judgments on our historical experience and on other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making the judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates and material effects on our operating results and financial position may result. The accounting policies which our management believes involve the most significant application of judgment or involve complex estimation, are inventories and associated reserves; revenue reserves; goodwill and intangible asset valuation; share-based compensation valuations and income taxes.

Significant management judgment is required in our valuation of goodwill and intangible assets, many of which are based on the creation of forecasts of future operating results that are used in the valuation, including (i) estimation of future cash flows, (ii) estimation of the long-term rate of growth for our business, (iii) estimation of the useful life over which cash flows will occur, (iv) terminal values, if applicable and (v) the determination of our weighted average cost of capital, which helps determine the discount rate. It is possible that these forecasts may change, and our performance projections included in our forecasts of future results may prove to be inaccurate. The value of our goodwill and purchased intangible assets could also be impacted by future adverse changes such as a decline in the valuation of technology company stocks, including the valuation of our common stock, or a significant slowdown in the worldwide economy or in the optical communications equipment or semiconductor industry.

For additional information related to these and other accounting policies refer to Note 2 - Summary of Significant Accounting Policies to our Consolidated Financial Statements included in Item 8 of Part II, “Financial Statements and Supplementary Data,” of the 2022 Annual Report on Form 10-K and Note 1 - Basis of Presentation and Summary of Significant Accounting Policies to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q.

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Results of Operations

The following table sets forth, for the periods indicated, our statements of operations data (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue	$	169,406	$	165,147	$	349,510	$	324,767
Cost of revenue (1)	66,716		66,158		136,465		131,636
Gross profit	102,690		98,989		213,045		193,131
Operating expenses:
Research and development (1)	35,537		35,455		74,369		70,925
Selling, general and administrative (1)	31,249		30,963		64,189		62,566
Total operating expenses	66,786		66,418		138,558		133,491
Income from operations	35,904		32,571		74,487		59,640
Other income (expense):
Interest income (expense), net	1,634		(1,389)		2,236		(3,082)
Other (expense) income, net (2)	(123)		(55)		(178)		114,853
Total other income (expense), net	1,511		(1,444)		2,058		111,771
Income before income taxes	37,415		31,127		76,545		171,411
Income tax expense	11,660		1,569		21,271		3,026
Net income	$	25,755	$	29,558	$	55,274	$	168,385

(1)     Includes (a) Amortization expense related to intangible assets arising from acquisitions and (b) Share-based compensation expense included in our condensed consolidated statements of operations as set forth below (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
(a) Intangible amortization expense:
Cost of revenue	$	988	$	1,778	$	1,898	$	4,283
Selling, general and administrative	5,764		6,276		11,667		13,058
(b) Share-based compensation expense:
Cost of revenue	$	1,011	$	1,073	$	2,161	$	2,106
Research and development	3,742		3,511		7,974		7,110
Selling, general and administrative	4,707		5,383		10,372		10,700

(2) The six months ended April 1, 2022 includes a gain on the sale of our equity method investment of $118.2 million and net losses of $3.3 million associated with such equity method investment. See Note 4 - Investments to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q for additional information.

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The following table sets forth, for the periods indicated, our statements of operations data expressed as a percentage of our revenue: 

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue	100.0	%	100.0	%	100.0	%	100.0	%
Cost of revenue	39.4		40.1		39.0		40.5
Gross profit	60.6		59.9		61.0		59.5
Operating expenses:
Research and development	21.0		21.5		21.3		21.8
Selling, general and administrative	18.4		18.7		18.4		19.3
Total operating expenses	39.4		40.2		39.6		41.1
Income from operations	21.2		19.7		21.3		18.4
Other income (expense):
Interest income (expense), net	1.0		(0.8)		0.6		(0.9)
Other (expense) income, net	(0.1)		—		(0.1)		35.4
Total other income (expense), net	0.9		(0.9)		0.6		34.4
Income before income taxes	22.1		18.8		21.9		52.8
Income tax expense	6.9		1.0		6.1		0.9
Net income	15.2	%	17.9	%	15.8	%	51.8	%

Comparison of the Three and Six Months Ended March 31, 2023 to the Three and Six Months Ended April 1, 2022

Revenue. Our revenue increased by $4.3 million, or 2.6%, to $169.4 million for the three months ended March 31, 2023, from $165.1 million for the three months ended April 1, 2022, and our revenue increased by $24.7 million, or 7.6%, to $349.5 million for the six months ended March 31, 2023, from $324.8 million for the six months ended April 1, 2022. The increase in revenue in the three and six months ended March 31, 2023 is described by end market in the following paragraphs.

Revenue from our primary markets, the percentage of change between the periods presented, and revenue by primary markets expressed as a percentage of total revenue in the periods presented were (in thousands, except percentages):

		Three Months Ended								Six Months Ended
		March 31, 2023			April 1, 2022		% Change			March 31, 2023			April 1, 2022		% Change
Telecom	$	53,888		$	62,927		(14.4)	%	$	115,337		$	118,749		(2.9)	%
Industrial & Defense		77,194			67,139		15.0	%		154,363			140,285		10.0	%
Data Center		38,324			35,081		9.2	%		79,810			65,733		21.4	%
Total	$	169,406		$	165,147		2.6	%	$	349,510		$	324,767		7.6	%
Telecom		31.8	%		38.1	%				33.0	%		36.6	%
Industrial & Defense		45.6	%		40.7	%				44.2	%		43.2	%
Data Center		22.6	%		21.2	%				22.8	%		20.2	%
Total		100.0	%		100.0	%				100.0	%		100.0	%

In the three months ended March 31, 2023, our Telecom market revenue decreased by $9.0 million, or 14.4%, compared to the three months ended April 1, 2022. In the six months ended March 31, 2023, our Telecom market revenue decreased by $3.4 million, or 2.9%, compared to the six months ended April 1, 2022. The decrease for the three months ended March 31, 2023 was primarily driven by a decrease in sales of products targeted for 5G applications. The decrease for the six months ended March 31, 2023 was primarily driven by a decrease in sales of products targeted for 5G applications and a decrease in sales of legacy backhaul products, partially offset by an increase in sales of RF and microwave products for broadband access and video infrastructure.

In the three months ended March 31, 2023, our I&D market revenue increased by $10.1 million, or 15.0%, compared to the three months ended April 1, 2022. In the six months ended March 31, 2023, our I&D market revenue increased by $14.1 million, or 10.0%, compared to the six months ended April 1, 2022. The increase in the three and six months ended March 31,

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2023 was primarily driven by ongoing defense program shipments and expansion of high-performance analog product lines into the I&D market.

In the three months ended March 31, 2023, our Data Center market revenue increased by $3.2 million, or 9.2%, compared to the three months ended April 1, 2022. In the six months ended March 31, 2023, our Data Center market revenue increased by $14.1 million, or 21.4%, compared to the six months ended April 1, 2022. The increase in the three months ended March 31, 2023 was primarily driven by an increase in sales of our legacy connectivity products, which were supply constrained in prior periods, partially offset by a decrease in sales of high-performance analog Data Center products and optical semiconductor products. The increase in the six months ended March 31, 2023 was primarily driven by an increase in sales of our legacy connectivity products, which were supply constrained in prior periods, partially offset by a decrease in sales of optical semiconductor products.

We expect our revenue in the second half of fiscal year 2023 to be negatively impacted by the current macroeconomic conditions, resulting in weaker near-term demand for our products.

Gross profit. Gross margin was 60.6% and 59.9% for the three months ended March 31, 2023 and April 1, 2022, respectively, and 61.0% and 59.5% for the six months ended March 31, 2023 and April 1, 2022, respectively. Gross profit was $102.7 million and $99.0 million for the three months ended March 31, 2023 and April 1, 2022, respectively, and $213.0 million and $193.1 million for the six months ended March 31, 2023 and April 1, 2022, respectively. Gross profit increased for the three months ended March 31, 2023 as compared to the three months ended April 1, 2022 primarily as a result of higher sales, favorable product mix, lower intangible amortization, partially offset by increases in production supplies and employee headcount. Gross profit increased for the six months ended March 31, 2023 as compared to the six months ended April 1, 2022 primarily as a result of higher sales, including $2.0 million of non-recurring license revenue, favorable product mix, lower intangible amortization, partially offset by increases in production supplies, facility-related costs and employee headcount.

Research and development. Research and development expense increased by less than $0.1 million, or 0.2%, to $35.5 million, or 21.0% of our revenue, for the three months ended March 31, 2023, compared to $35.5 million, or 21.5% of our revenue, for the three months ended April 1, 2022. Research and development expense increased by $3.4 million, or 4.9%, to $74.4 million, or 21.3% of our revenue, for the six months ended March 31, 2023, compared to $70.9 million, or 21.8% of our revenue, for the six months ended April 1, 2022. Research and development expense increased in the six months ended March 31, 2023 primarily as a result of an increase in development foundry costs, employee headcount, employee-related costs and share-based compensation expense.

Selling, general and administrative. Selling, general and administrative expense increased by $0.3 million, or 0.9%, to $31.2 million, or 18.4% of our revenue, for the three months ended March 31, 2023, compared to $31.0 million, or 18.7% of our revenue, for the three months ended April 1, 2022. Selling, general and administrative expense increased by $1.6 million, or 2.6%, to $64.2 million, or 18.4% of our revenue, for the six months ended March 31, 2023, compared to $62.6 million, or 19.3% of our revenue, for the six months ended April 1, 2022. Selling, general and administrative expense increased in the three and six months ended March 31, 2023 primarily due to an increase in acquisition-related professional fees, travel expense, variable selling costs, partially offset by a decrease in employee-related costs.

Interest income (expense), net. In the three months ended March 31, 2023, interest income, net was $1.6 million, or 1.0% of our revenue, compared to interest expense, net of $1.4 million, or 0.8% of our revenue, for the three months ended April 1, 2022. In the six months ended March 31, 2023, interest income, net was $2.2 million, or 0.6% of our revenue, compared to interest expense, net of $3.1 million, or 0.9% of our revenue, for the six months ended April 1, 2022. The change for the three and six months ended March 31, 2023 is primarily due to an increase in short-term investments and associated interest income, partially offset by an increase in interest expense on the Term Loans.

Other (expense) income, net. In the three months ended March 31, 2023, other expense, net was $0.1 million, or 0.1% of our revenue, compared to other expense, net of $0.1 million, or 0.03% of our revenue, for the three months ended April 1, 2022. In the six months ended March 31, 2023, other expense, net was $0.2 million, or 0.1% of our revenue, compared to other income, net of $114.9 million, or 35.4% of our revenue, for the six months ended April 1, 2022. The six months ended April 1, 2022 includes a gain on the sale of our equity method investment of $118.2 million and net losses of $3.3 million associated with such equity method investment. See Note 4 - Investments to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q for additional information.

Provision for income taxes. Our income tax expense and effective income tax rates for the periods indicated were (in thousands, except percentages):

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	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Income tax expense	11,660		1,569		21,271		3,026
Effective income tax rate	31.2	%	5.0	%	27.8	%	1.8	%

The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended March 31, 2023, was primarily driven by tax on GILTI, including changes to Section 174, non-deductible compensation and state income taxes partially offset by income taxed in foreign jurisdictions generally at lower tax rates, and R&D tax credits. The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended April 1, 2022 was primarily driven by the full valuation allowance against any expense associated with income in the U.S. and income taxed in foreign jurisdictions generally at lower tax rates, where a valuation allowance does not apply. Our estimated annual effective tax rate for the year ending September 29, 2023 is expected to be approximately 30%, adjusted for discrete taxation matters arising during the interim periods.

For additional information refer to Note 14 - Income Taxes to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q.

Liquidity and Capital Resources

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

	Six Months Ended
	March 31, 2023		April 1, 2022
Cash and cash equivalents, beginning of period	$	119,952	$	156,537
Net cash provided by operating activities	70,747		76,597
Net cash used in investing activities	(24,972)		(75,212)
Net cash used in financing activities	(29,524)		(30,123)
Foreign currency effect on cash	370		(224)
Cash and cash equivalents, end of period	$	136,573	$	127,575

Cash Flow from Operating Activities

Our cash flow from operating activities for the six months ended March 31, 2023 of $70.7 million consisted of a net income of $55.3 million plus adjustments of $63.3 million, to reconcile our net income to cash provided by operating activities, less cash used in operating assets and liabilities of $47.8 million. Adjustments to reconcile our net income to cash provided by operating activities primarily included depreciation and intangible amortization expense of $25.4 million, share-based compensation expense of $20.5 million and deferred income tax expense of $20.2 million. In addition, cash used in operating assets and liabilities was $47.8 million for the six months ended March 31, 2023, primarily driven by a decrease of $17.5 million in accrued and other liabilities, an increase in accounts receivable of $18.3 million, an increase in inventories of $8.2 million.

Our cash flow from operating activities for the six months ended April 1, 2022 of $76.6 million consisted of a net income of $168.4 million, less adjustments of $63.5 million, to reconcile our net income to cash provided by operating activities and cash used in operating assets and liabilities of $28.3 million. Adjustments to reconcile our net income to cash provided by operating activities primarily included a net gain of $114.9 million related to the sale of our equity method investment offset by equity method investment losses, depreciation and intangible amortization expense of $29.1 million and share-based compensation expense of $19.9 million. In addition, cash used in operating assets and liabilities was $28.3 million for the six months ended April 1, 2022, primarily driven by an increase in accounts receivable of $16.0 million, an increase in inventories of $10.7 million and a decrease of $4.9 million in accrued and other liabilities.

Cash Flow from Investing Activities

Our cash flow used in investing activities for the six months ended March 31, 2023 of $25.0 million consisted primarily of cash paid for the Linearizer Acquisition, net of cash acquired of $50.8 million, capital expenditures of $15.6 million and purchases of $228.2 million of short-term investments, offset by proceeds of $261.6 million for the sale and maturity of short-term investments and proceeds from the sale of equipment of $8.0 million.

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Our cash flow used in investing activities for the six months ended April 1, 2022 of $75.2 million consisted primarily of purchases of $282.6 million of short-term investments and capital expenditures of $12.2 million, offset by proceeds from the sale of our equity method investment of $127.8 million and proceeds of $91.8 million for the sale and maturity of short-term investments. For additional information on the sale of our equity method investment, see Note 4 - Investments to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q.

Cash Flow from Financing Activities

During the six months ended March 31, 2023, our cash used in financing activities of $29.5 million was primarily related to $31.3 million of repurchases of common stock associated with employee tax withholdings on vested equity awards, partially offset by $2.3 million of proceeds from employee stock purchases.

During the six months ended April 1, 2022, our cash used in financing activities of $30.1 million was primarily related to $34.8 million of repurchases of stock associated with employee tax withholdings on vested equity awards, partially offset by $5.1 million of proceeds from stock option exercises and employee stock purchases.

Liquidity

As of March 31, 2023, we held $136.6 million of cash and cash equivalents, primarily deposited with financial institutions, as well as $440.7 million of liquid short-term investments. The undistributed earnings of certain foreign subsidiaries are considered indefinitely reinvested for the periods presented and we do not intend to repatriate such earnings. We believe the decision to reinvest these earnings will not have a significant impact on our liquidity. As of March 31, 2023, cash held by our indefinitely reinvested foreign subsidiaries was $11.1 million, which, along with cash generated from foreign operations, is expected to be used in the support of international growth and working capital requirements as well as the repayment of certain intercompany loans.

We plan to use our remaining available cash and cash equivalents and short-term investments for general corporate purposes, including working capital, or for the acquisition of or investment in complementary technologies, design teams, products and businesses. We believe that our cash and cash equivalents, short-term investments and cash generated from operations will be sufficient to meet our working capital requirements for at least the next twelve months. We may need to raise additional capital from time to time through the issuance and sale of equity or debt securities, and there is no assurance that we will be able to do so on favorable terms or at all.

As of March 31, 2023, we had no off-balance sheet arrangements.

For additional information related to our Liquidity and Capital Resources, see Note 9 - Debt to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q.

Recent Accounting Pronouncements

See Note 1 - Basis of Presentation and Summary of Significant Accounting Policies to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q for information about recent accounting pronouncements.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are exposed to market risk in the ordinary course of business, which consists primarily of interest rate risk associated with our cash and cash equivalents, short-term investments and our variable rate debt, as well as foreign exchange rate risk.

Interest rate risk. The primary objectives of our investment activity are to preserve principal, provide liquidity and invest excess cash for an average rate of return. To minimize market risk, we maintain our portfolio in cash and diversified investments, which may consist of corporate bonds, bank deposits, money market funds and commercial paper. The interest rates are variable and fluctuate with current market conditions. The risk associated with fluctuating interest rates is limited to this investment portfolio. We believe that a 10% change in interest rates would not have a material impact on our financial position or results of operations. We do not enter into financial instruments for trading or speculative purposes.

 Our exposure to interest rate risk also relates to the increase or decrease in the amount of interest expense we must pay on the outstanding debt under the Credit Agreement. The interest rates on our Term Loans are variable interest rates based on our lender’s prime rate or a LIBOR rate, in each case plus an applicable margin, which exposes us to market interest rate risk when we have outstanding borrowings under the Credit Agreement. The UK Financial Conduct Authority announced that they will cease publishing certain tenors of USD LIBOR on June 30, 2023; we expect our interest rate to change to synthetic USD LIBOR during the third quarter of fiscal year 2023. As of March 31, 2023, we had $120.8 million of outstanding borrowings under the Credit Agreement. Assuming our outstanding debt remains constant under the Credit Agreement for an entire year and the applicable annual interest rate increases or decreases by 1%, our annual interest expense would increase or decrease by $1.2 million. The interest rates on our 2026 Convertible Notes are fixed and therefore not subject to interest rate risk.

25

Foreign currency risk. To date, our international customer agreements have been denominated primarily in U.S. dollars. Accordingly, we have limited exposure to foreign currency exchange rates. The functional currency of a majority of our foreign operations continues to be in U.S. dollars with the remaining operations being local currency. Changes in the value of the U.S. dollar relative to other currencies could make our products more expensive, which could negatively impact demand in certain regions, reduce or delay customer orders, or otherwise negatively affect how customers do business with us. The effects of exchange rate fluctuations on the net assets of the majority of our operations are accounted for as transaction gains or losses. We believe that a change of 10% in such foreign currency exchange rates would not have a material impact on our financial position or results of operations. In the future, we may enter into foreign currency exchange hedging contracts to reduce our exposure to changes in exchange rates.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this Quarterly Report on Form 10-Q, we carried out an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). Based on this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) were effective as of March 31, 2023.

Changes in Internal Control over Financial Reporting

There were no changes to our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that occurred during our most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Limitations on Controls

Our disclosure controls and procedures and internal control over financial reporting are designed to provide reasonable assurance of achieving the desired control objectives. Our management recognizes that any control system, no matter how well designed and operated, is based upon certain judgments and assumptions and cannot provide absolute assurance that its objectives will be met. Similarly, an evaluation of controls cannot 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.

26

PART II—OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See Note 12 - Commitments and Contingencies to our Condensed Consolidated Financial Statements in this Quarterly Report on Form 10-Q for information about our legal proceedings.

ITEM 1A. RISK FACTORS

Our business involves a high degree of risk.  In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the factors discussed in Part I, “Item 1A. Risk Factors” in our 2022 Annual Report on Form 10-K, which could materially affect our business, financial condition or future results. As of the date of this Quarterly Report on Form 10-Q, there have been no material changes in any of the risk factors described in our 2022 Annual Report on Form 10-K, except as noted below.

We expect to make future acquisitions and investments, which involve numerous risks.

We routinely evaluate potential acquisitions, investments and strategic alliances involving complementary technologies, design teams, products and companies. We expect to pursue such transactions if appropriate opportunities arise. However, we may not be able to identify suitable transactions in the future or if we do identify such transactions, we may not be able to complete them on commercially acceptable terms or at all and may face intense competition for such opportunities. In the event we pursue a potential transaction, we will face numerous risks, including diverting management’s attention from normal daily operations of our business; difficulties in integrating the financial reporting capabilities and operating systems of any acquired operations to maintain effective internal control over financial reporting and disclosure controls and procedures; potential loss of key personnel of the acquired company as well as their know-how, relationships and expertise; challenges successfully integrating acquired personnel, operations and businesses; failing to realize the anticipated synergies and benefits of an acquisition; maintaining favorable business relationships of acquired operations; generating insufficient revenue from completed transactions to offset expenses associated with our efforts; acquiring material or unknown liabilities associated with any acquired operations; litigation associated with merger and acquisition transactions; and increasing expense associated with amortization or depreciation of intangible and tangible assets we acquire.

Our past acquisitions required significant management time and attention relating to the transactions. Past transactions, whether completed or abandoned by us, have resulted, and in the future may result, in significant time and attention, costs, expenses, liabilities and charges to earnings. The accounting treatment for any future transaction may result in significant amortizable intangible assets which, when amortized, will negatively affect our consolidated results of operations. The accounting treatment may also result in significant goodwill, which, if impaired, will negatively affect our consolidated results of operations. Furthermore, we may incur debt or issue equity securities to pay for transactions. The incurrence of debt could limit our operating flexibility and be detrimental to our profitability, and the issuance of equity securities would be dilutive to our existing stockholders. Any or all of the above factors may differ from the investment community’s expectations in a given quarter, which could negatively affect our stock price. In the event we make future investments, the investments may decline in value, we may lose all or part of our investment.

We may be unable to successfully integrate the businesses and personnel of acquired companies and businesses, and may not realize the anticipated synergies and benefits of such acquisitions.

We may be unable to realize the expected benefits from acquisitions of companies and certain businesses of companies because of integration difficulties or other challenges. The success of our acquisitions will depend, in part, on our ability to realize all or some of the anticipated synergies and other benefits from integrating the acquired businesses with our existing businesses. The integration process may be complex, costly and time-consuming. The potential difficulties we may face in integrating the operations of our acquisitions include, among others: failure to implement our business plans for the combined businesses and consolidation or expansion of production capacity as planned and where applicable; unexpected losses of key employees, customers or suppliers of our acquired companies and businesses; unanticipated issues in conforming our acquired companies’ and businesses’ standards, processes, procedures and controls with our operations; coordinating new product and process development; increasing the scope, geographic diversity and complexity of our operations; diversion of management’s attention from other business concerns; adverse effects on our or our acquired companies’ and businesses’ existing business relationships; unanticipated changes in applicable laws and regulations; operating risks inherent in our acquired companies’ and businesses’ business and operations; unanticipated expenses and liabilities; potential unfamiliarity with our acquired companies and businesses technology, products and markets, which may place us at a competitive disadvantage; and other difficulties in the assimilation of our acquired companies and businesses operations, technologies, products and systems.

Any acquired companies and businesses may have unanticipated or larger than anticipated liabilities for patent and trademark infringement claims, violations of applicable laws, rules and regulations, commercial disputes, taxes and other known and unknown types of liabilities. There may be liabilities that we underestimated or did not discover in the course of

27

performing our due diligence investigation of our acquired companies and businesses. We may have no recourse or limited recourse under the applicable acquisition-related agreement to recover damages relating to the liabilities of our acquired companies and businesses.

We may not be able to maintain or increase the levels of revenue, earnings or operating efficiency that we, and each of our acquired companies and businesses, had historically achieved or might achieve separately. In addition, we may not accomplish the integration smoothly, successfully or within the anticipated costs or timeframe. If we experience difficulties with the integration process or if the business of our acquired companies or businesses deteriorates, the anticipated cost savings, growth opportunities and other synergies of our acquired companies and businesses may not be realized fully or at all, or may take longer to realize than expected. If any of the above risks occur, our business, financial condition, results of operations and cash flows may be materially and adversely impacted, we may fail to meet the expectations of investors or analysts, and our stock price may decline as a result.

Our short-term investment portfolio and certain cash balances could experience a decline in market value or otherwise become illiquid, which could materially and adversely affect our financial results.

As of March 31, 2023, we had approximately $20.6 million in money market funds and $440.7 million in short-term investments, respectively. The debt security investments consisted of commercial paper and corporate bonds. We currently do not use derivative financial instruments to adjust our investment portfolio risk or income profile. These investments, as well as any cash deposited in bank accounts, are subject to general credit, liquidity, market and interest rate risks, which may be exacerbated by unusual events, such as the COVID-19 pandemic, the Eurozone crisis and the U.S. debt ceiling crisis, which affected various sectors of the financial markets and led to global credit and liquidity issues. For example, in March and April 2023, certain US banks were closed and the Federal Deposit Insurance Corporation (FDIC) was appointed as receiver. While we were not directly impacted by these closures and did not have any deposits with these banks, there can be no assurance that our current or future banks will not face similar risks, and that we would be able to recover in full our deposits in the event of similar closures. We regularly maintain cash balances that are not insured or are in excess of the FDIC’s insurance limit. If the global financial markets continue to experience volatility or deteriorate, our investment portfolio and cash balances may be impacted and some or all of our investments may become illiquid or otherwise experience loss which could adversely impact our financial results and position.

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

Issuer Purchases of Equity Securities

The following table presents information with respect to purchases of common stock we made during the fiscal quarter ended March 31, 2023. 

Period	Total Number of Shares (or Units) Purchased (1)	Average Price Paid per Share (or Unit)		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares (or Units) that May Yet Be Purchased Under the Plans or Programs
December 31,2022-January 27, 2023	973	$	64.17	—	—
January 28, 2023-February 24, 2023	69,248	67.99		—	—
February 25, 2023-March 31, 2023	1,567	69.04		—	—
Total	71,788	$	67.96	—	—

(1)    We employ “withhold to cover” as a tax payment method for vesting of restricted stock awards for our employees, pursuant to which, we withheld from employees the shares noted in the table above to cover tax withholding related to the vesting of their awards. The average prices listed in the above table are averages of the fair market prices at which we valued shares withheld for purposes of calculating the number of shares to be withheld.

28

ITEM 6. EXHIBITS

Exhibit Number	Description
3.1	Fifth Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed on June 2, 2016).
3.2	Certificate of Amendment to Fifth Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed on March 7, 2023).
3.3	Fourth Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed on January 6, 2023).
31.1	Certification of Principal Executive Officer Required Under Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended.
31.2	Certification of Principal Financial Officer Required Under Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended.
32.1	Certification of Principal Executive Officer and Principal Financial Officer Required Under Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. §1350.
101	The following material from the Quarterly Report on Form 10-Q of MACOM Technology Solutions Holdings, Inc. for the fiscal quarter ended March 31, 2023, formatted in Inline XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations, (iii) Consolidated Statements of Comprehensive Income, (iv) Consolidated Statements of Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, (vi) Notes to Consolidated Financial Statements and (vii) document and entity information, tagged as blocks of text and including detailed tags.
104	The cover page for the Quarterly Report on Form 10-Q of MACOM Technology Solutions Holdings, Inc. for the fiscal quarter ended March 31, 2023, formatted in Inline XBRL and included as Exhibit 101

29

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Quarterly Report on Form 10-Q to be signed on its behalf by the undersigned thereunto duly authorized.

	MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
Dated: May 4, 2023	By:	/s/ Stephen G. Daly
		Stephen G. Daly
		President and Chief Executive Officer (Principal Executive Officer)
Dated: May 4, 2023	By:	/s/ John F. Kober
		John F. Kober
		Senior Vice President and Chief Financial Officer (Principal Accounting and Principal Financial Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION OF THE PRESIDENT AND CEO PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Stephen G. Daly, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of MACOM Technology Solutions Holdings, Inc.;

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

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

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

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

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

Date:	May 4, 2023
	/s/ Stephen G. Daly
	Stephen G. Daly
	President and Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF THE CFO PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John F. Kober, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of MACOM Technology Solutions Holdings, Inc.;

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

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

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

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

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

Date:	May 4, 2023
	/s/ John F. Kober
	John F. Kober
	SVP and 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

    In connection with the Quarterly Report of MACOM Technology Solutions Holdings, Inc. (the “Company”) on Form 10-Q for the quarter ended March 31, 2023 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Stephen G. Daly, as President and Chief Executive Officer of the Company, and John F. Kober, as SVP and Chief Financial Officer of the Company, each hereby certifies, pursuant to and solely for the purpose of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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

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

Date:	May 4, 2023
By:	/s/ Stephen G. Daly
	Stephen G. Daly
	President and Chief Executive Officer
	(Principal Executive Officer)
By:	/s/ John F. Kober
	John F. Kober
	SVP and Chief Financial Officer
	(Principal Financial Officer)

XML

Cover Page - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	May 01, 2023	Sep. 30, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-35451
Entity Registrant Name	MACOM Technology Solutions Holdings, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	27-0306875
Entity Address, Address Line One	100 Chelmsford Street
Entity Address, City or Town	Lowell
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01851
City Area Code	978
Local Phone Number	656-2500
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	MTSI
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		70,884,080
Entity Central Index Key	0001493594
Amendment Flag	false
Current Fiscal Year End Date	--09-29
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2023
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ (3,339)		$ (5,906)

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Assets, Current [Abstract]
Cash and cash equivalents	$ 136,573	$ 119,952
Short-term investments	440,735	466,580
Accounts Receivable, after Allowance for Credit Loss, Current	121,823	101,551
Inventories	131,882	114,960
Prepaid and other current assets	17,303	10,040
Total current assets	848,316	813,083
Property and equipment, net	123,266	123,701
Goodwill	324,610	311,417
Intangible assets, net	67,289	51,254
Deferred income taxes	217,816	237,415
Other long-term assets	36,176	34,947
Total assets	1,617,473	1,571,817
Current liabilities:
Finance lease liabilities	4,870	1,006
Accounts payable	31,095	30,733
Accrued liabilities	55,284	65,475
Total current liabilities	91,249	97,214
Finance lease liabilities	26,486	27,032
Financing obligation	9,436	9,544
Long-term debt	566,743	565,920
Other long-term liabilities	29,544	29,359
Total liabilities	723,458	729,069
Stockholders’ equity:
Common stock	71	70
Treasury stock, at cost	(330)	(330)
Accumulated other comprehensive income	(1,433)	(5,851)
Additional paid-in capital	1,194,719	1,203,145
Accumulated deficit	(299,012)	(354,286)
Total stockholders’ equity	894,015	842,748
Total liabilities and stockholders' equity	$ 1,617,473	$ 1,571,817

XML

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Income Statement [Abstract]
Revenue	$ 169,406	$ 165,147	$ 349,510	$ 324,767
Cost of revenue	66,716	66,158	136,465	131,636
Gross profit	102,690	98,989	213,045	193,131
Operating expenses:
Research and development	35,537	35,455	74,369	70,925
Selling, general and administrative	31,249	30,963	64,189	62,566
Total operating expenses	66,786	66,418	138,558	133,491
Income from operations	35,904	32,571	74,487	59,640
Other income (expense):
Interest income (expense), net	1,634	(1,389)	2,236	(3,082)
Other (expense) income, net	(123)	(55)	(178)	114,853
Total other income (expense), net	1,511	(1,444)	2,058	111,771
Income before income taxes	37,415	31,127	76,545	171,411
Income tax expense	11,660	1,569	21,271	3,026
Net income	$ 25,755	$ 29,558	$ 55,274	$ 168,385
Net income per share:
Income (loss) per share - Basic (usd per share)	$ 0.36	$ 0.42	$ 0.78	$ 2.42
Income (loss) per share - Diluted (usd per share)	$ 0.36	$ 0.42	$ 0.77	$ 2.37
Weighted average shares used:
Basic (in shares)	70,799	69,788	70,640	69,594
Diluted (in shares)	71,402	71,107	71,388	71,166

XML

Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 25,755	$ 29,558	$ 55,274	$ 168,385
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	833	(2,335)	3,380	(2,952)
Foreign currency translation gain (loss), net of tax	301	(679)	1,038	(1,003)
Other comprehensive income (loss), net of tax	1,134	(3,014)	4,418	(3,955)
Total comprehensive income	$ 26,889	$ 26,544	$ 59,692	$ 164,430

XML

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Treasury Stock	Accumulated Other Comprehensive Income	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Balance at beginning of period, (in shares) at Oct. 01, 2021			68,877
Balance at beginning of period at Oct. 01, 2021	$ 471,736	$ (72,177)	$ 69	$ (330)	$ 4,150	$ 1,269,601	$ (79,690)	$ (801,754)	$ 7,513
Balance at beginning of period, treasury stock (in shares) at Oct. 01, 2021				(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			190
Stock option exercises	2,688					2,688
Vesting of restricted common stock and units (in shares)			1,284
Vesting of restricted common stock and units	1		$ 1
Issuance of common stock pursuant to employee stock purchase plan (in shares)			56
Issuance of common stock pursuant to employee stock purchase plan	2,447					2,447
Shares repurchased for stock withholdings on restricted stock awards (in shares)			(497)
Shares repurchased for tax withholdings on equity awards	(34,758)					(34,758)
Share-based compensation	19,916					19,916
Other comprehensive income, net of tax	(3,955)				(3,955)
Net income	168,385							168,385
Balance at end of period, (in shares) at Apr. 01, 2022			69,910
Balance at end of period at Apr. 01, 2022	554,283		$ 70	$ (330)	195	1,180,204		(625,856)
Balance at end of period, treasury stock (in shares) at Apr. 01, 2022				(23)
Balance at beginning of period, (in shares) at Dec. 31, 2021			69,709
Balance at beginning of period at Dec. 31, 2021	524,774		$ 70	$ (330)	3,209	1,177,239		(655,414)
Balance at beginning of period, treasury stock (in shares) at Dec. 31, 2021				(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted common stock and units (in shares)			315
Vesting of restricted common stock and units	0		$ 0
Shares repurchased for stock withholdings on restricted stock awards (in shares)			(114)
Shares repurchased for tax withholdings on equity awards	(7,002)					(7,002)
Share-based compensation	9,967					9,967
Other comprehensive income, net of tax	(3,014)				(3,014)
Net income	29,558							29,558
Balance at end of period, (in shares) at Apr. 01, 2022			69,910
Balance at end of period at Apr. 01, 2022	554,283		$ 70	$ (330)	195	1,180,204		(625,856)
Balance at end of period, treasury stock (in shares) at Apr. 01, 2022				(23)
Balance at beginning of period, (in shares) at Sep. 30, 2022			70,022
Balance at beginning of period at Sep. 30, 2022	842,748		$ 70	$ (330)	(5,851)	1,203,145		(354,286)
Balance at beginning of period, treasury stock (in shares) at Sep. 30, 2022				(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted common stock and units (in shares)			1,338
Vesting of restricted common stock and units	1		$ 1
Issuance of common stock pursuant to employee stock purchase plan (in shares)			52
Issuance of common stock pursuant to employee stock purchase plan	2,320					2,320
Shares repurchased for stock withholdings on restricted stock awards (in shares)			(515)
Shares repurchased for tax withholdings on equity awards	(31,253)					(31,253)
Share-based compensation	20,507					20,507
Other comprehensive income, net of tax	4,418				4,418
Net income	55,274							55,274
Balance at end of period, (in shares) at Mar. 31, 2023			70,897
Balance at end of period at Mar. 31, 2023	894,015		$ 71	$ (330)	(1,433)	1,194,719		(299,012)
Balance at end of period, treasury stock (in shares) at Mar. 31, 2023				(23)
Balance at beginning of period, (in shares) at Dec. 30, 2022			70,757
Balance at beginning of period at Dec. 30, 2022	862,544		$ 71	$ (330)	(2,567)	1,190,137		(324,767)
Balance at beginning of period, treasury stock (in shares) at Dec. 30, 2022				(23)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of restricted common stock and units (in shares)			212
Vesting of restricted common stock and units	0		$ 0
Shares repurchased for stock withholdings on restricted stock awards (in shares)			(72)
Shares repurchased for tax withholdings on equity awards	(4,878)					(4,878)
Share-based compensation	9,460					9,460
Other comprehensive income, net of tax	1,134				1,134
Net income	25,755							25,755
Balance at end of period, (in shares) at Mar. 31, 2023			70,897
Balance at end of period at Mar. 31, 2023	$ 894,015		$ 71	$ (330)	$ (1,433)	$ 1,194,719		$ (299,012)
Balance at end of period, treasury stock (in shares) at Mar. 31, 2023				(23)

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 55,274	$ 168,385
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and intangibles amortization	25,365	29,080
Share-based compensation	20,507	19,916
Deferred income taxes	20,233	1,284
Gain on equity method investment, net	0	(114,908)
Other adjustments, net	(2,784)	1,176
Change in operating assets and liabilities:
Accounts receivable	(18,316)	(15,983)
Inventories	(8,236)	(10,653)
Prepaid expenses and other assets	(2,857)	597
Accounts payable	(253)	1,632
Accrued and other liabilities	(17,471)	(4,930)
Income taxes	(715)	1,001
Net cash provided by operating activities	70,747	76,597
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of business, net of cash acquired	(50,835)	0
Proceeds from sale of equity method investment	0	127,750
Purchases of property and equipment	(15,614)	(12,184)
Proceeds from sales and maturities of short-term investments	261,634	91,841
Purchases of short-term investments	(228,157)	(282,642)
Proceeds from sale of property and equipment	8,000	23
Net cash used in investing activities	(24,972)	(75,212)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on finance leases and other	(591)	(500)
Proceeds from stock option exercises and employee stock purchases	2,320	5,135
Repurchase of common stock - tax withholdings on equity awards	(31,253)	(34,758)
Net cash used in financing activities	(29,524)	(30,123)
Foreign currency effect on cash	370	(224)
NET CHANGE IN CASH AND CASH EQUIVALENTS	16,621	(28,962)
CASH AND CASH EQUIVALENTS — Beginning of period	119,952	156,537
CASH AND CASH EQUIVALENTS — End of period	$ 136,573	$ 127,575

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Supplemental Cash Flow Information

6 Months Ended

Mar. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

SUPPLEMENTAL CASH FLOW INFORMATION

The following is a summary of supplemental cash flow information for the periods presented (in thousands):

	Six Months Ended
	March 31, 2023		April 1, 2022
Cash paid for interest	$	5,367	$	2,953
Cash paid for income taxes	$	1,701	$	695
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for new lease liabilities	$	3,920	$	2,306
Finance lease assets obtained in exchange for new lease liabilities	$	3,821	$	—
Additions to property and equipment, net included in liabilities	$	—	$	2,010

During the six months ended April 1, 2022, we capitalized $0.9 million of non-cash costs to property and equipment associated with construction of a power generator that were paid by our service provider and included in Additions to property and equipment, net included in liabilities above. See Note 10 - Financing Obligation.

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Supplemental Cash Flow Information

6 Months Ended

Mar. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities

The following is a summary of supplemental cash flow information for the periods presented (in thousands):

	Six Months Ended
	March 31, 2023		April 1, 2022
Cash paid for interest	$	5,367	$	2,953
Cash paid for income taxes	$	1,701	$	695
Non-cash activities:
Operating lease right-of-use assets obtained in exchange for new lease liabilities	$	3,920	$	2,306
Finance lease assets obtained in exchange for new lease liabilities	$	3,821	$	—
Additions to property and equipment, net included in liabilities	$	—	$	2,010

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Supplemental Cash Flow Information - Additional Information $ in Millions	Apr. 01, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capitalized Costs, Uncompleted Wells, Equipment and Facilities	$ 0.9

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Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information Regarding Non-cash Investing and Financing Activities - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Supplemental Cash Flow Elements [Abstract]
Cash paid for interest	$ 5,367	$ 2,953
Cash paid for income taxes	1,701	695
Operating lease right-of-use assets obtained in exchange for new lease liabilities	3,920	2,306
Financing lease assets obtained in exchange for new lease liabilities	3,821	0
Additions to property and equipment, net included in liabilities	$ 0	$ 2,010

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Summary of Significant Accounting Policies

6 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Unaudited Interim Financial Information—The accompanying unaudited, condensed consolidated financial statements have been prepared according to the rules and regulations of the United States (the “U.S.”) Securities and Exchange Commission (the “SEC”) and, in the opinion of management, reflect all adjustments, which include normal recurring adjustments, necessary for a fair statement of the condensed consolidated balance sheets, condensed consolidated statements of operations, comprehensive income, stockholders' equity and cash flows of MACOM Technology Solutions Holdings, Inc. (“MACOM”, the “Company”, “us”, “we” or “our”) for the periods presented. We prepare our interim financial information using the same accounting principles we use for our annual audited consolidated financial statements. Certain information and note disclosures normally included in the annual audited consolidated financial statements have been condensed or omitted in accordance with prescribed SEC rules. We believe that the disclosures made in our condensed consolidated financial statements and the accompanying notes are adequate to make the information presented not misleading.

The condensed consolidated balance sheet as of September 30, 2022 is as reported in our audited consolidated financial statements as of that date. Our accounting policies are described in the notes to our September 30, 2022 consolidated financial statements, which were included in our Annual Report on Form 10-K for our fiscal year ended September 30, 2022 filed with the SEC on November 14, 2022 (the “2022 Annual Report on Form 10-K”). We recommend that the financial statements included in this Quarterly Report on Form 10-Q be read in conjunction with the consolidated financial statements and notes included in our 2022 Annual Report on Form 10-K.

Principles of Consolidation, Basis of Presentation and Reclassification—The accompanying condensed consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. In the condensed consolidated financial statements, certain balances have been reclassified to conform to the current year presentation.

We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. Fiscal years 2023 and 2022 each include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first fiscal quarter.

Use of Estimates—The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions. The accounting policies which our management believes involve the most significant application of judgment or involve complex estimation, are inventories and associated reserves; revenue reserves; goodwill and intangible asset valuation; share-based compensation valuations and income taxes.

Recent Accounting Pronouncements—Our Recent Accounting Pronouncements are described in our 2022 Annual Report on Form 10-K.

Pronouncements for Adoption in Subsequent Periods

The FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, amended by ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which provides optional expedients and exceptions to applying the guidance on contract modifications, hedge accounting, and other transactions, to simplify the accounting for transitioning from the London Interbank Offered Rate, and other interbank offered rates expected to be discontinued, to alternative reference rates. The guidance in this update was effective upon its issuance. If elected, the guidance is to be applied prospectively through December 31, 2024. We are currently evaluating the effect the potential adoption of this ASU will have on our consolidated financial statements, including, but not limited to, our Credit Agreement (defined below). For additional information regarding our Credit Agreement, refer to Note 9 - Debt.

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Revenue

6 Months Ended

Mar. 31, 2023

Revenue [Abstract]

Revenue

REVENUE

Disaggregation of Revenue

We disaggregate revenue from contracts with customers by markets and geography, as we believe it best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors.

The following tables present our revenue disaggregated by markets and geography (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Market:
Telecommunications	$	53,888	$	62,927	$	115,337	$	118,749
Industrial & Defense	77,194		67,139		154,363		140,285
Data Center	38,324		35,081		79,810		65,733
Total	$	169,406	$	165,147	$	349,510	$	324,767

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Geographic Region:
United States	$	82,835	$	74,547	$	171,423	$	148,973
China	33,325		46,028		74,481		82,091
Asia Pacific, excluding China (1)	28,008		25,881		49,542		56,531
Other Countries (2)	25,238		18,691		54,064		37,172
Total	$	169,406	$	165,147	$	349,510	$	324,767

(1)Asia Pacific primarily represents Australia, Japan, Malaysia, Singapore, South Korea, Taiwan and Thailand.

(2)No country or region represented greater than 10% of our total revenue as of the dates presented, other than the United States, China and Asia Pacific region as presented above.

Contract Balances

We record contract assets or contract liabilities depending on the timing of revenue recognition, billings and cash collections on a contract-by-contract basis. Our contract liabilities primarily relate to deferred revenue, including advanced consideration received from customers for contracts prior to the transfer of control to the customer, and therefore revenue is subsequently recognized upon delivery of products and services.

The following table presents the changes in contract liabilities during the six months ended March 31, 2023 (in thousands, except percentage):

	March 31, 2023		September 30, 2022		$ Change		% Change
Contract liabilities	$	1,076	$	3,916	$	(2,840)	(73)	%

During the three and six months ended March 31, 2023, we recognized sales of $1.4 million and $2.9 million, respectively, that were included in the contract liabilities balance as of the beginning of the period. The decrease in contract liabilities during the six months ended March 31, 2023 was primarily related to recognition of revenue that was previously deferred for products and services invoiced prior to when certain of our customers obtained control of such products and/or services

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Acquisitions

6 Months Ended

Mar. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Acquisitions

ACQUISITIONS

Acquisition of Linearizer Technology Inc.— On March 3, 2023, we completed the acquisition of Linearizer Technology, Inc. (“Linearizer”), a developer of modules and subsystems, including solid state amplifiers (SSPAs), microwave predistortion linearizers and microwave photonics (the “Linearizer Acquisition”). We acquired Linearizer to further strengthen our component and subsystem design expertise in our target markets. In connection with the Linearizer Acquisition, we acquired all of the outstanding shares of Linearizer for total cash consideration of approximately $51.6 million, subject to customary purchase price adjustments. We funded the Linearizer Acquisition with cash-on-hand. During the three and six months ended March 31, 2023, we incurred acquisition-related transaction costs of approximately $1.9 million, which are included in selling, general and administrative expense. There were no transaction costs for the three and six months ended April 1, 2022. The Linearizer Acquisition was accounted for as a business combination and the operations of Linearizer have been included in our consolidated financial statements since the date of acquisition.

The purchase price for the Linearizer Acquisition has been allocated based on preliminary estimates of fair values of the acquired assets and assumed liabilities at the date of acquisition as follows (in thousands):

	At Acquisition Date as Reported March 31, 2023
Current assets	$	11,726
Property and equipment	5,485
Intangible assets	29,600
Goodwill	12,332
Total assets acquired	59,143
Current liabilities	7,544
Total liabilities assumed	7,544
Purchase Price	$	51,599

We recorded goodwill of $12.3 million. Intangible assets consist of customer relationships of $20.7 million with an 8.6 year life, technology of $7.1 million with a 7.6 year life and a trade name of $1.8 million with a 7.6 year life. We used the income approach to determine the fair value of the definite-lived intangible assets and the cost and market approaches to determine the fair value of our property, plant and equipment. We amortize definite-lived assets based on the pattern over which we expect to receive the economic benefit from these assets. The intangible assets and goodwill acquired will be amortizable for tax purposes due to the Section 338 election filed.

The determination and allocation of purchase price consideration is based on preliminary estimates of fair value; such estimates and assumptions are subject to change within the measurement period (up to one year from the acquisition date). As of March 31, 2023, the purchase price allocation for Linearizer remains open as we gather additional information regarding the assets acquired and the liabilities assumed, primarily in relation to the valuation of intangibles, inventory, fixed assets, leases and contingencies.

Pro forma financial information for the three and six months ended March 31, 2023 and April 1, 2022 and the actual results of operations for Linearizer since the acquisition date are not material to our condensed consolidated financial statements for the periods presented.

On March 3, 2023, we entered into a lease agreement with an entity that is majority-owned by certain former Linearizer employees, which is deemed to be a related party agreement. We have the option to purchase the facility for $3.8 million. As of the date of this Quarterly Report on Form 10-Q, we have not exercised such right. During the three months ended March 31, 2023, we made lease-related payments of $0.2 million. This lease is classified as a finance lease on our condensed consolidated balance sheet and is included in property and equipment of $5.5 million in the purchase price allocation table above.

Other Acquisition— On December 23, 2022, we entered into a definitive agreement to acquire substantially all of the assets and certain specified liabilities of OMMIC SAS, a semiconductor manufacturer based in France with expertise in wafer fabrication, epitaxial growth and monolithic microwave integrated circuit semiconductor processing and integrated circuit design. The purchase price is expected to be approximately €38.5 million, funded by cash-on-hand, and the proposed transaction is expected to close in our fiscal year 2023, subject to regulatory and other government approvals and the satisfaction of certain closing conditions.

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Investments

6 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Investments

INVESTMENTS

All investments are short-term in nature and are invested in corporate bonds and commercial paper and are classified as available-for-sale. These corporate bonds and commercial paper are owned directly by the Company and are segregated in brokerage custody accounts. The amortized cost, gross unrealized holding gains or losses and fair value of our available-for-sale investments by major investment type are summarized in the tables below (in thousands):

	March 31, 2023
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	140,151	$	27	$	(2,999)	$	137,179
Commercial paper	303,871		25		(340)		303,556
Total short-term investments	$	444,022	$	52	$	(3,339)	$	440,735

	September 30, 2022
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	146,163	$	5	$	(4,492)	$	141,676
Commercial paper	326,318		—		(1,414)		324,904
Total short-term investments	$	472,481	$	5	$	(5,906)	$	466,580

The contractual maturities of available-for-sale investments were as follows (in thousands):

	March 31, 2023		September 30, 2022
Less than one year	$	347,944	$	368,141
Over one year	92,791		98,439
Total available-for-sale investments	$	440,735	$	466,580

We have determined that the gross unrealized losses on available for sale securities as of March 31, 2023 and September 30, 2022 are temporary in nature and/or do not relate to credit loss, and therefore there is no expense for credit losses recorded in our condensed consolidated statements of operations. Unrealized gains and losses on available-for-sale investments are reported as a separate component of stockholders’ equity within accumulated other comprehensive income.

During the three months ended March 31, 2023 and April 1, 2022, Interest income (expense), net included interest income on short-term investments of $5.1 million and $0.5 million, respectively. During the six months ended March 31, 2023 and April 1, 2022, Interest income (expense), net included interest income on short-term investments of $8.7 million and $0.8 million, respectively.

Other Investments — As of March 31, 2023, we held a non-marketable equity investment in Series B preferred stock of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. As the equity securities do not have a readily determinable fair value and do not qualify for the practical expedient under Accounting Standards Codification 820, Fair Value Measurement, we have elected to account for this investment at cost less any impairment. We evaluate this investment for impairment at each balance sheet date. As of March 31, 2023 and September 30, 2022, the carrying value of this investment was $2.5 million and it was classified as a long-term investment.

On December 23, 2021, we sold our non-controlling investment of less than 10% in the outstanding equity of a private company to one of the other limited liability company members, pursuant to the terms of a previously negotiated call option included in the private company’s limited liability company agreement, as amended and restated (the “LLC Agreement”), in exchange for a predetermined fixed price as set forth in the LLC Agreement of approximately $127.8 million in cash consideration. As of December 23, 2021, the carrying value of this investment was approximately $9.5 million. As a result of this transaction, during the three months ended December 31, 2021, we recorded a gain of $118.2 million in Other (expense) income, net in our condensed consolidated statements of operations. The six months ended April 1, 2022 includes a gain on the sale of our equity method investment of $118.2 million, and we recorded net losses of $3.3 million associated with such equity method investment.

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Fair Value

6 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value

FAIR VALUE

We group our financial assets and liabilities measured at fair value on a recurring basis in three levels, based on the markets in which the assets and liabilities are traded, and the reliability of the assumptions used to determine fair value. These levels are:

Level 1 - Quoted prices in active markets for identical assets or liabilities.

Level 2 - Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets with insufficient volume or infrequent transactions (less active markets), or model-driven valuations in which all significant inputs are observable or can be derived principally from, or corroborated with, observable market data.

Level 3 - Fair value is derived from valuation techniques in which one or more significant inputs are unobservable, including assumptions and judgments made by us.

Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis

We measure certain assets and liabilities at fair value on a recurring basis such as our financial instruments. There have been no transfers between Level 1, 2 or 3 assets or liabilities during the three and six months ended March 31, 2023.

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):

	March 31, 2023
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	20,570	$	20,570	$	—	$	—
Commercial paper	303,556		—		303,556		—
Corporate bonds	137,179		—		137,179		—
Total assets measured at fair value	$	461,305	$	20,570	$	440,735	$	—

	September 30, 2022
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	1,392	$	1,392	$	—	$	—
Commercial paper	324,904		—		324,904		—
Corporate bonds	141,676		—		141,676		—
Total assets measured at fair value	$	467,972	$	1,392	$	466,580	$	—

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Inventories

6 Months Ended

Mar. 31, 2023

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

Inventories consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Raw materials	$	83,057	$	72,595
Work-in-process	16,990		12,455
Finished goods	31,835		29,910
Total inventory, net	$	131,882	$	114,960

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Property, Plant and Equipment

6 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

PROPERTY AND EQUIPMENT

Property and equipment consists of the following (in thousands):

	March 31, 2023		September 30, 2022
Construction in process	$	14,318	$	10,837
Machinery and equipment	229,125		227,844
Leasehold improvements	35,288		35,651
Furniture and fixtures	2,601		2,535
Computer equipment and software	18,519		18,347
Finance lease assets	38,238		34,417
Total property and equipment	338,089		329,631
Less accumulated depreciation and amortization	(214,823)		(205,930)
Property and equipment, net	$	123,266	$	123,701

Depreciation and amortization expense related to property and equipment for the three and six months ended March 31, 2023 was $5.8 million and $11.8 million, respectively. Depreciation and amortization expense related to property and equipment for the three and six months ended April 1, 2022 was $5.8 million and $11.7 million, respectively. Accumulated amortization on finance lease assets as of March 31, 2023 and September 30, 2022 was $6.7 million and $5.8 million, respectively.

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Intangible Assets

6 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

INTANGIBLE ASSETS

Amortization expense related to intangible assets is as follows (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	988	$	1,778	$	1,898	$	4,283
Selling, general and administrative	5,764		6,276		11,667		13,058
Total	$	6,752	$	8,054	$	13,565	$	17,341

Intangible assets consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Acquired technology	$	186,534	$	179,434
Customer relationships	266,570		245,870
Trade name	5,200		3,400
Total	458,304		428,704
Less accumulated amortization	(391,015)		(377,450)
Intangible assets — net	$	67,289	$	51,254

A summary of the activity in gross intangible assets and goodwill is as follows (in thousands):

	Intangible Assets
	Total Intangible Assets		Acquired Technology		Customer Relationships		Trade Name		Goodwill
Balance as of September 30, 2022	$	428,704	$	179,434	$	245,870	$	3,400	$	311,417
Acquired	29,600		7,100		20,700		1,800		12,332
Currency translation adjustment	—		—		—		—		861
Balance as of March 31, 2023	$	458,304	$	186,534	$	266,570	$	5,200	$	324,610

As of March 31, 2023, our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands):

	2023 Remaining		2024	2025	2026	2027	Thereafter	Total
Amortization expense	$	14,295	18,643	7,381	6,397	5,842	11,331	$	63,889

Accumulated amortization for acquired technology and customer relationships were $177.1 million and $213.9 million, respectively, as of March 31, 2023, and $175.2 million and $202.3 million, respectively, as of September 30, 2022.

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Debt

6 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Debt

DEBT

The following represents the outstanding balances and effective interest rates of our borrowings as of March 31, 2023 and September 30, 2022, (in thousands, except percentages):

	March 31, 2023				September 30, 2022
	Principal Balance		Effective Interest Rate		Principal Balance		Effective Interest Rate
LIBOR plus 2.25% term loans due May 2024	$	120,766	6.88	%	$	120,766	4.77	%
0.25% convertible notes due March 2026	450,000		0.54	%	450,000		0.54	%
Total principal amount outstanding	570,766				570,766
Less: Unamortized discount on term loans and deferred financing costs	(4,023)				(4,846)
Total long-term debt	$	566,743			$	565,920

Term Loans

As of March 31, 2023, we are party to a credit agreement, dated as of May 8, 2014, with a syndicate of lenders and Goldman Sachs Bank USA, as administrative agent (as amended on February 13, 2015, August 31, 2016, March 10, 2017, May 19, 2017, May 2, 2018 and May 9, 2018, the “Credit Agreement”).

As of March 31, 2023, the Credit Agreement consisted of term loans with an initial aggregate principal amount of $700.0 million (the “Term Loans”) that will mature in May 2024 and bear interest at: (i) for LIBOR loans for any interest period, a rate per annum equal to the LIBOR rate as determined by the administrative agent, plus an applicable margin of 2.25%; and (ii) for base rate loans, a rate per annum equal to the greater of (a) the prime rate quoted in the print edition of the Wall Street Journal, Money Rates Section, (b) the federal funds rate plus one-half of 1.00% and (c) the LIBOR rate applicable to a one-month interest period plus 1.00% (but, in each case, not less than 1.00%), plus an applicable margin of 1.25%. The UK Financial Conduct Authority announced that they will cease publishing certain tenors of USD LIBOR on June 30, 2023; we expect our interest rate to change to synthetic USD LIBOR during the third quarter of fiscal year 2023.

As of March 31, 2023, there are no minimum principal repayments on the Term Loans until May 2024 when the remaining principal balance of $120.8 million becomes due. The fair value of the Term Loans was estimated to be approximately $120.3 million and $120.2 million as of March 31, 2023 and September 30, 2022, respectively, and was determined using Level 2 inputs, including a quoted price from a financial institution.

As of March 31, 2023, approximately $0.4 million of deferred financing costs remain unamortized related to the Term Loans and is recorded as a direct reduction of the recognized debt liabilities in our accompanying condensed consolidated balance sheet.

The Term Loans are secured by a first priority lien on substantially all of our assets and provide that we must comply with certain financial and non-financial covenants.

2026 Convertible Notes

On March 25, 2021, we issued 0.25% convertible senior notes due in fiscal year 2026, pursuant to an indenture dated as of such date (the “Indenture”), between the Company and U.S. Bank National Association, as trustee, with an aggregate principal amount of $400.0 million (the “Initial Notes”), and on April 6, 2021, we issued an additional $50.0 million aggregate principal amount (the “Additional Notes”) (together, the “2026 Convertible Notes”). The aggregate principal balance of the 2026 Convertible Notes is $450.0 million. The 2026 Convertible Notes will mature on March 15, 2026, unless earlier converted, redeemed or repurchased.

The Additional Notes were issued and sold to the initial purchaser of the Initial Notes, pursuant to the option to purchase the Additional Notes granted by the Company to the initial purchaser and have the same terms as the Initial Notes.

Holders of the 2026 Convertible Notes may convert their notes at their option at any time prior to the close of business on the business day immediately preceding December 15, 2025 in multiples of $1,000 principal amount, only under the following circumstances: (i) during any fiscal quarter commencing after the fiscal quarter ending on July 2, 2021 (and only during such fiscal quarter), if the last reported sale price of our common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the notes on each applicable trading day; (ii) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the “trading price” (as defined in the Indenture) per $1,000 principal amount of the notes for each trading day of the Measurement Period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate for the notes on each such trading day; (iii) if we call such notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the applicable redemption date; or (iv) upon the occurrence of specified corporate events described in the Indenture. On or after December 15, 2025 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert their notes in multiples of $1,000 principal amount, regardless of the foregoing circumstances.

The initial conversion rate for the 2026 Convertible Notes is 12.1767 shares of common stock per $1,000 principal amount of the notes, equivalent to an initial conversion price of approximately $82.12 per share of common stock. The conversion rate will be subject to adjustment upon the occurrence of certain specified events in the Indenture.

In November 2021, we made an irrevocable election to pay cash for the aggregate principal amount of notes to be converted. Upon conversion of the 2026 Convertible Notes, we are required to pay cash up to the aggregate principal amount of the notes to be converted and 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, in respect of the remainder, if any, of our conversion obligation in excess of the aggregate principal amount of the notes being converted (subject to, and in accordance with, the settlement provisions of the Indenture). We may not redeem the notes prior to March 20, 2024. We may redeem for cash all or any portion of the notes, at

our option, on or after March 20, 2024 if the last reported sale price per share of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive), including the trading day immediately preceding the date on which we provide notice of redemption, during any 30 consecutive trading day period ending on, and including, the trading day immediately preceding the date on which we provide notice of redemption, at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus accrued and unpaid interest, to, but not including, the redemption date.

The Indenture does not contain any financial or operating covenants or restrictions on the payments of dividends, the making of investments, the incurrence of indebtedness or the purchase or prepayment of securities by us or any of our subsidiaries.

In connection with the adoption of ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, on October 2, 2021 we reclassified $72.2 million, consisting of $73.1 million of principal and issuance costs of $0.9 million, previously allocated to the conversion feature, from additional paid-in capital to long-term debt on our condensed consolidated balance sheet as of October 2, 2021. The reclassification was recorded to combine the two legacy units of account into a single instrument classified as a liability. We also recognized a cumulative effect adjustment of $7.5 million to accumulated deficit on our condensed consolidated balance sheet as of October 2, 2021, that was primarily driven by the derecognition of interest expense related to the accretion of the Debt Discount as required under the legacy accounting guidance. Under ASU 2020-06, we will no longer incur non-cash interest expense related to the accretion of the debt discount associated with the embedded conversion option.

For the three and six months ended March 31, 2023, total interest expense for the 2026 Convertible Notes was $0.3 million and $0.6 million, respectively. For the three and six months ended April 1, 2022, total interest expense for the 2026 Convertible Notes was $0.3 million and $0.6 million, respectively.

The fair value of our 2026 Convertible Notes, including the conversion feature, was $472.5 million and $411.4 million as of March 31, 2023 and September 30, 2022, respectively, and was determined based on quoted prices in markets that are not active, which is considered a Level 2 valuation input.

There are no future minimum principal payments under the notes as of March 31, 2023; the full amount of $450.0 million is due in fiscal year 2026.

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Financing Obligation

6 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Financing Obligation

FINANCING OBLIGATION

We are party to a power purchase agreement for the use of electric power and thermal energy producing systems at our fabrication facility in Lowell, Massachusetts. These systems are expected to reduce our consumption of energy while delivering sustainable, resilient energy for heating and cooling. We do not own these systems; however, we control the use of the assets during operation. As of March 31, 2023 and September 30, 2022, the net book value of the systems in Property and equipment, net was $9.2 million and $9.8 million, respectively, and the corresponding liability was $9.7 million and $9.8 million, respectively, primarily classified in Financing obligation on our condensed consolidated balance sheet. The financing obligation was calculated based on future fixed payments allocated to the power generator of $16.8 million over the 15-year term, discounted at an implied discount rate of 7.4%, and the remaining future minimum payments are for power purchases. In total, we have $27.2 million in fixed payments associated with the power purchase agreement, which has a 15-year term.

As of March 31, 2023, expected future minimum payments for the financing obligation were as follows (in thousands):

Fiscal year ending:	Amount
2023	$	468
2024	958
2025	982
2026	1,007
2027	1,031
Thereafter	11,914
Total payments	$	16,360
Less: interest	6,688
Present value of liabilities	$	9,672

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Earnings (Loss) Per Share

6 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

EARNINGS PER SHARE

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

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Numerator:
Net income attributable to common stockholders	$	25,755	$	29,558	$	55,274	$	168,385
Denominator:
Weighted average common shares outstanding-basic	70,799		69,788		70,640		69,594
Dilutive effect of stock options, restricted stock and restricted stock units	603		1,319		748		1,572
Weighted average common shares outstanding-diluted	71,402		71,107		71,388		71,166
Net income to common stockholders per share-Basic:	$	0.36	$	0.42	$	0.78	$	2.42
Net income to common stockholders per share-Diluted:	$	0.36	$	0.42	$	0.77	$	2.37

The 2026 Convertible Notes did not have an impact on diluted net income per share for the three and six months ended March 31, 2023 or April 1, 2022.

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Commitments and Contingencies	6 Months Ended
	Mar. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIESFrom time to time, we may be subject to commercial disputes, employment issues, claims by other companies in the industry that we have infringed their intellectual property rights and other similar claims and litigation. Any such claims may lead to future litigation and material damages and defense costs. We were not involved in any material pending legal proceedings during the three and six months ended March 31, 2023.

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Share-Based Compensation

6 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation

SHARE-BASED COMPENSATION

We have authorized 10 million shares of $0.001 par value preferred stock and 300 million shares of $0.001 par value common stock as of March 31, 2023.

Stock Plans

As of March 31, 2023, we had 4.6 million shares available for issuance under our 2021 Omnibus Incentive Plan (the “2021 Plan”), which replaced our 2012 Omnibus Incentive Plan (as amended and restated) (the “2012 Plan”), and 1.3 million shares available for issuance under our 2021 Employee Stock Purchase Plan (the “Employee Stock Purchase Plan”), which replaced our 2012 Employee Stock Purchase Plan. We have outstanding awards under the 2021 Plan and the 2012 Plan. Following the adoption of the 2021 Plan, no additional awards have been or will be made under the 2012 Plan. Under the 2021 Plan, we have the ability to issue incentive stock options (“ISOs”), non-statutory stock options (“NSOs”), stock appreciation rights (“SARs”), restricted stock awards (“RSAs”), unrestricted stock awards, stock units (including restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”)), performance awards, cash awards, and other share-based awards to employees, directors, consultants and advisors. The ISOs and NSOs must be granted at an exercise price, and the SARs must be granted at a base value, per share of not less than 100% of the closing price of a share of our common stock on the date of grant (or, if no closing price is reported on that date, the closing price on the immediately preceding date on which a closing price was reported) (110% in the case of certain ISOs). Options granted under the 2012 Plan primarily vested based on certain market-based and performance-based criteria and generally have a term of four years to seven years. Certain of the share-based awards granted and outstanding as of March 31, 2023 are subject to accelerated vesting upon a change in control of the Company.

Incentive Stock Units

Aside from the equity plans described above, we also grant incentive stock units (“ISUs”) to certain of our international employees which typically vest over three or four years and for which the fair value is determined by our underlying stock price, which are classified as liabilities and settled in cash upon vesting.

As of March 31, 2023 and September 30, 2022, the fair value of outstanding ISUs was $4.5 million and $4.9 million, respectively, and the associated accrued compensation liability was $2.1 million and $3.6 million, respectively. During the three and six months ended March 31, 2023, we recorded an expense for ISU awards of $0.5 million and $1.8 million, respectively.

During the three and six months ended April 1, 2022, we recorded a benefit for ISU awards of $0.9 million and expense of $0.6 million, respectively. These expenses are not included in the share-based compensation expense totals below.

Share-Based Compensation

The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	1,011	$	1,073	$	2,161	$	2,106
Research and development	3,742		3,511		7,974		7,110
Selling, general and administrative	4,707		5,383		10,372		10,700
Total share-based compensation expense	$	9,460	$	9,967	$	20,507	$	19,916

As of March 31, 2023, the total unrecognized compensation costs related to RSAs, RSUs and PRSUs was $70.4 million, which we expect to recognize over a weighted-average period of 2.1 years. As of March 31, 2023, total unrecognized compensation cost related to our Employee Stock Purchase Plan was $0.3 million.

Restricted Stock, Restricted Stock Units and Performance-Based Restricted Stock Unit Awards

A summary of stock award activity for the six months ended March 31, 2023 is as follows:

	Number of shares (in thousands)	Weighted- Average Grant Date Fair Value
Balance as of September 30, 2022	1,872	$	40.44
Granted	751	63.25
Performance-based adjustment (1)	311	27.13
Vested and released	(1,338)	28.11
Forfeited, canceled or expired	(39)	47.46
Balance as of March 31, 2023	1,557	$	59.23

(1) The amount shown represents performance adjustments for performance-based awards. These were granted in prior fiscal years and vested during the six months ended March 31, 2023 based on the Company’s achievement of adjusted earnings per share performance conditions.

Stock awards that vested during the six months ended March 31, 2023 and April 1, 2022 had combined fair values of $81.3 million and $89.3 million, respectively, as of the vesting date. RSUs granted generally vest over a period of three or four years.

We granted 166,452 market-based PRSUs during the six months ended March 31, 2023, at a weighted average grant date fair value of $80.38 per share, and none were forfeited. Recipients may earn between 0% and 200% of the target number of shares based on the Company’s achievement of total stockholder return in comparison to a peer group of companies in the PHLX Semiconductor Sector Index (^SOX) over a period of approximately 3 years. The fair value of the awards was estimated using a Monte Carlo simulation and compensation expense is recognized ratably over the service period based on the grant date fair value of the awards subject to the market condition. The expected volatility of the Company’s common stock was estimated based on the historical average volatility rate over the three-year period. The dividend yield assumption was based on historical and anticipated dividend payouts. The risk-free rate assumption was based on observed interest rates consistent with the three-year measurement period. The assumptions used to value the awards are as follows:

	Six Months Ended
	March 31, 2023
Grant date stock price	$	56.15
Average stock price at the start of the performance period	$	54.12
Risk free interest rate	4.2%
Years to maturity	2.90
Expected volatility rate	52.4%
Expected dividend yield	—

Stock Options

As of March 31, 2023 and December 30, 2022, there were 15,000 stock options outstanding with a weighted-average exercise price per share of $16.06. As of March 31, 2023, the weighted-average remaining contractual term was 2.60 years and the aggregate intrinsic value was $0.8 million. Aggregate intrinsic value is calculated using the difference between our closing stock price on March 31, 2023 and the exercise price of outstanding, in-the-money options. The total intrinsic value of options exercised was $11.0 million for the six months ended April 1, 2022. There were no options exercised during the three and six months ended March 31, 2023 and three months ended April 1, 2022, respectively.

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Income Taxes

6 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

We are subject to income tax in the U.S. as well as other tax jurisdictions in which we conduct business. Earnings from non-U.S. activities are subject to local country income tax and may also be subject to current U.S. income tax. For interim periods, we record a tax provision or benefit based upon the estimated effective tax rate expected for the full fiscal year, adjusted for material discrete taxation matters arising during the interim periods. Our quarterly tax provision or benefit, and its quarterly estimate of the annual effective tax rate, are subject to significant variation due to several factors. These factors include items such as: variability in accurately predicting pre-tax income/loss, the mix of jurisdictions in which we operate, intercompany transactions, changes in how we do business, tax law developments, the realizability of our deferred tax assets and related valuation allowance and relative changes in permanent tax benefits or expenses.

The provision for income taxes and effective income tax rate are as follows (in thousands, except percentages):

	Three Months Ended						Six Months Ended
	March 31, 2023			April 1, 2022			March 31, 2023			April 1, 2022
Income tax expense	$	11,660		$	1,569		$	21,271		$	3,026
Effective income tax rate	31.2		%	5.0		%	27.8		%	1.8		%

The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended March 31, 2023 was primarily driven by tax on global intangible low-taxed income (“GILTI”) including changes to Section 174, non-deductible compensation and state income taxes partially offset by income taxed in foreign jurisdictions generally at lower tax rates and research and development (“R&D”) tax credits. The difference between the U.S. federal statutory income tax rate of 21% and our effective income tax rate for the three and six months ended April 1, 2022 was primarily driven by the full valuation allowance against any expense associated with income in the U.S. and income taxed in foreign jurisdictions generally at lower tax rates, where a valuation allowance does not apply.

On September 30, 2022, we released the majority of the valuation allowances against U.S. federal and state deferred tax assets including operating loss (“NOL”) carryforwards, R&D tax credit carryforwards and other deferred tax items relating to temporary differences. We continued our ongoing assessment of the realizability of our deferred tax assets and did not note any significant changes from our assessment on September 30, 2022. We continue to maintain a partial valuation allowance against certain of our deferred tax assets primarily relating to state NOLs and R&D tax credit carryforwards which are not expected to be realized. We recognize deferred tax assets to the extent that we believe that these assets are more likely than not to be realized. In making this determination, we consider available positive and negative evidence. We look at factors that may impact the valuation of our deferred tax assets including results of recent operations, future reversals of existing taxable temporary differences, projected future taxable income and tax-planning strategies.

There were no unrecognized tax benefits as of March 31, 2023 and September 30, 2022. It is our policy to recognize any interest and penalties accrued related to unrecognized tax benefits in income tax expense. During the fiscal quarter ended March 31, 2023, we did not make any accrual or payment of interest or penalties.

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Geographic and Significant Customer Information

6 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Geographic and Significant Customer Information

GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION

We have one reportable operating segment that designs, develops, manufactures and markets semiconductors and modules. The determination of the number of reportable operating segments is based on the chief operating decision maker’s (“CODM”) use of financial information provided for the purposes of assessing performance and making operating decisions. The Company's CODM is its President and Chief Executive Officer. In evaluating financial performance and making operating decisions, the CODM primarily uses consolidated metrics. The Company assesses its determination of operating segments at least annually. We continue to evaluate our internal reporting structure and the potential impact of any changes on our segment reporting.

For information about our revenue in different geographic regions, based upon customer locations, see Note 2 - Revenue. Information about net property and equipment in different geographic regions is presented below (in thousands):

	March 31, 2023		September 30, 2022
United States	$	117,606	$	108,569
Other Countries (1)	5,660		15,132
Total	$	123,266	$	123,701

(1)Other than the United States, no country represented greater than 10% of the total net property and equipment as of the dates presented.

No customer represented more than 10% of revenue or more than 10% of accounts receivable in the periods presented in the accompanying condensed consolidated financial statements. For the three and six months ended March 31, 2023, our top ten customers represented 48% and 49%, respectively, of total revenue, and for the three and six months ended April 1, 2022, our top ten customers represented 48% and 45%, respectively, of total revenue

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Mar. 31, 2023

Accounting Policies [Abstract]

Principles of Consolidation

Principles of Consolidation, Basis of Presentation and Reclassification—The accompanying condensed consolidated financial statements include our accounts and the accounts of our majority-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. In the condensed consolidated financial statements, certain balances have been reclassified to conform to the current year presentation.

Fiscal Period

We have a 52- or 53-week fiscal year ending on the Friday closest to the last day of September. Fiscal years 2023 and 2022 each include 52 weeks. To offset the effect of holidays, for fiscal years in which there are 53 weeks, we include the extra week arising in such fiscal years in the first fiscal quarter.

Use of Estimates

Use of Estimates—The preparation of condensed consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities during the reporting periods, the reported amounts of revenue and expenses during the reporting periods and the disclosure of contingent assets and liabilities at the date of the financial statements. On an ongoing basis, we base estimates and assumptions on historical experience, currently available information and various other factors that management believes to be reasonable under the circumstances. Actual results may differ materially from these estimates and assumptions. The accounting policies which our management believes involve the most significant application of judgment or involve complex estimation, are inventories and associated reserves; revenue reserves; goodwill and intangible asset valuation; share-based compensation valuations and income taxes.

Recent Accounting Pronouncements

Recent Accounting Pronouncements—Our Recent Accounting Pronouncements are described in our 2022 Annual Report on Form 10-K.

Pronouncements for Adoption in Subsequent Periods

The FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, amended by ASU 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which provides optional expedients and exceptions to applying the guidance on contract modifications, hedge accounting, and other transactions, to simplify the accounting for transitioning from the London Interbank Offered Rate, and other interbank offered rates expected to be discontinued, to alternative reference rates. The guidance in this update was effective upon its issuance. If elected, the guidance is to be applied prospectively through December 31, 2024. We are currently evaluating the effect the potential adoption of this ASU will have on our consolidated financial statements, including, but not limited to, our Credit Agreement (defined below). For additional information regarding our Credit Agreement, refer to Note 9 - Debt.

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Revenue (Tables)

6 Months Ended

Mar. 31, 2023

Revenue [Abstract]

Disaggregation of Revenue

The following tables present our revenue disaggregated by markets and geography (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Market:
Telecommunications	$	53,888	$	62,927	$	115,337	$	118,749
Industrial & Defense	77,194		67,139		154,363		140,285
Data Center	38,324		35,081		79,810		65,733
Total	$	169,406	$	165,147	$	349,510	$	324,767

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Revenue by Geographic Region:
United States	$	82,835	$	74,547	$	171,423	$	148,973
China	33,325		46,028		74,481		82,091
Asia Pacific, excluding China (1)	28,008		25,881		49,542		56,531
Other Countries (2)	25,238		18,691		54,064		37,172
Total	$	169,406	$	165,147	$	349,510	$	324,767

(1)Asia Pacific primarily represents Australia, Japan, Malaysia, Singapore, South Korea, Taiwan and Thailand.

(2)No country or region represented greater than 10% of our total revenue as of the dates presented, other than the United States, China and Asia Pacific region as presented above.

Contract with Customer, Asset and Liability

The following table presents the changes in contract liabilities during the six months ended March 31, 2023 (in thousands, except percentage):

	March 31, 2023		September 30, 2022		$ Change		% Change
Contract liabilities	$	1,076	$	3,916	$	(2,840)	(73)	%

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Acquisitions (Tables)

6 Months Ended

Mar. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Schedule of Business Acquisitions, by Acquisition

The purchase price for the Linearizer Acquisition has been allocated based on preliminary estimates of fair values of the acquired assets and assumed liabilities at the date of acquisition as follows (in thousands):

	At Acquisition Date as Reported March 31, 2023
Current assets	$	11,726
Property and equipment	5,485
Intangible assets	29,600
Goodwill	12,332
Total assets acquired	59,143
Current liabilities	7,544
Total liabilities assumed	7,544
Purchase Price	$	51,599

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Investments (Tables)

6 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of Contractual Maturities of Investments

The contractual maturities of available-for-sale investments were as follows (in thousands):

	March 31, 2023		September 30, 2022
Less than one year	$	347,944	$	368,141
Over one year	92,791		98,439
Total available-for-sale investments	$	440,735	$	466,580

Debt Securities, Available-for-sale

The amortized cost, gross unrealized holding gains or losses and fair value of our available-for-sale investments by major investment type are summarized in the tables below (in thousands):

	March 31, 2023
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	140,151	$	27	$	(2,999)	$	137,179
Commercial paper	303,871		25		(340)		303,556
Total short-term investments	$	444,022	$	52	$	(3,339)	$	440,735

	September 30, 2022
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Aggregate Fair Value
Corporate bonds	$	146,163	$	5	$	(4,492)	$	141,676
Commercial paper	326,318		—		(1,414)		324,904
Total short-term investments	$	472,481	$	5	$	(5,906)	$	466,580

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Fair Value (Tables)

6 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis consist of the following (in thousands):

	March 31, 2023
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	20,570	$	20,570	$	—	$	—
Commercial paper	303,556		—		303,556		—
Corporate bonds	137,179		—		137,179		—
Total assets measured at fair value	$	461,305	$	20,570	$	440,735	$	—

	September 30, 2022
	Fair Value		Active Markets for Identical Assets (Level 1)		Observable Inputs (Level 2)		Unobservable Inputs (Level 3)
Assets
Money market funds	$	1,392	$	1,392	$	—	$	—
Commercial paper	324,904		—		324,904		—
Corporate bonds	141,676		—		141,676		—
Total assets measured at fair value	$	467,972	$	1,392	$	466,580	$	—

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Inventories (Tables)

6 Months Ended

Mar. 31, 2023

Inventory Disclosure [Abstract]

Components of Inventories

Inventories consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Raw materials	$	83,057	$	72,595
Work-in-process	16,990		12,455
Finished goods	31,835		29,910
Total inventory, net	$	131,882	$	114,960

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Property, Plant and Equipment (Tables)

6 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Components of Property, Plant and Equipment

Property and equipment consists of the following (in thousands):

	March 31, 2023		September 30, 2022
Construction in process	$	14,318	$	10,837
Machinery and equipment	229,125		227,844
Leasehold improvements	35,288		35,651
Furniture and fixtures	2,601		2,535
Computer equipment and software	18,519		18,347
Finance lease assets	38,238		34,417
Total property and equipment	338,089		329,631
Less accumulated depreciation and amortization	(214,823)		(205,930)
Property and equipment, net	$	123,266	$	123,701

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Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortization Expense of Intangible Assets

Amortization expense related to intangible assets is as follows (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	988	$	1,778	$	1,898	$	4,283
Selling, general and administrative	5,764		6,276		11,667		13,058
Total	$	6,752	$	8,054	$	13,565	$	17,341

Summary of Intangible Assets

Intangible assets consist of the following (in thousands):

	March 31, 2023		September 30, 2022
Acquired technology	$	186,534	$	179,434
Customer relationships	266,570		245,870
Trade name	5,200		3,400
Total	458,304		428,704
Less accumulated amortization	(391,015)		(377,450)
Intangible assets — net	$	67,289	$	51,254

Summary of Activity in Intangible Assets and Goodwill

A summary of the activity in gross intangible assets and goodwill is as follows (in thousands):

	Intangible Assets
	Total Intangible Assets		Acquired Technology		Customer Relationships		Trade Name		Goodwill
Balance as of September 30, 2022	$	428,704	$	179,434	$	245,870	$	3,400	$	311,417
Acquired	29,600		7,100		20,700		1,800		12,332
Currency translation adjustment	—		—		—		—		861
Balance as of March 31, 2023	$	458,304	$	186,534	$	266,570	$	5,200	$	324,610

Summary of Estimated Amortization of Intangible Assets in Future Fiscal Years

As of March 31, 2023, our estimated amortization of our intangible assets in future fiscal years was as follows (in thousands):

	2023 Remaining		2024	2025	2026	2027	Thereafter	Total
Amortization expense	$	14,295	18,643	7,381	6,397	5,842	11,331	$	63,889

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Debt (Tables)

6 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of Remained Outstanding on Term Loans

The following represents the outstanding balances and effective interest rates of our borrowings as of March 31, 2023 and September 30, 2022, (in thousands, except percentages):

	March 31, 2023				September 30, 2022
	Principal Balance		Effective Interest Rate		Principal Balance		Effective Interest Rate
LIBOR plus 2.25% term loans due May 2024	$	120,766	6.88	%	$	120,766	4.77	%
0.25% convertible notes due March 2026	450,000		0.54	%	450,000		0.54	%
Total principal amount outstanding	570,766				570,766
Less: Unamortized discount on term loans and deferred financing costs	(4,023)				(4,846)
Total long-term debt	$	566,743			$	565,920

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Financing Obligations (Tables)

6 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Financing Obligation, Liability, Fiscal Year Maturity

As of March 31, 2023, expected future minimum payments for the financing obligation were as follows (in thousands):

Fiscal year ending:	Amount
2023	$	468
2024	958
2025	982
2026	1,007
2027	1,031
Thereafter	11,914
Total payments	$	16,360
Less: interest	6,688
Present value of liabilities	$	9,672

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Earnings (Loss) Per Share (Tables)

6 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Computation for Basic and Diluted Net Loss Per Share of Common Stock

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

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Numerator:
Net income attributable to common stockholders	$	25,755	$	29,558	$	55,274	$	168,385
Denominator:
Weighted average common shares outstanding-basic	70,799		69,788		70,640		69,594
Dilutive effect of stock options, restricted stock and restricted stock units	603		1,319		748		1,572
Weighted average common shares outstanding-diluted	71,402		71,107		71,388		71,166
Net income to common stockholders per share-Basic:	$	0.36	$	0.42	$	0.78	$	2.42
Net income to common stockholders per share-Diluted:	$	0.36	$	0.42	$	0.77	$	2.37

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Share-Based Compensation (Tables)

6 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees

The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands):

	Three Months Ended				Six Months Ended
	March 31, 2023		April 1, 2022		March 31, 2023		April 1, 2022
Cost of revenue	$	1,011	$	1,073	$	2,161	$	2,106
Research and development	3,742		3,511		7,974		7,110
Selling, general and administrative	4,707		5,383		10,372		10,700
Total share-based compensation expense	$	9,460	$	9,967	$	20,507	$	19,916

Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity

A summary of stock award activity for the six months ended March 31, 2023 is as follows:

	Number of shares (in thousands)	Weighted- Average Grant Date Fair Value
Balance as of September 30, 2022	1,872	$	40.44
Granted	751	63.25
Performance-based adjustment (1)	311	27.13
Vested and released	(1,338)	28.11
Forfeited, canceled or expired	(39)	47.46
Balance as of March 31, 2023	1,557	$	59.23

(1) The amount shown represents performance adjustments for performance-based awards. These were granted in prior fiscal years and vested during the six months ended March 31, 2023 based on the Company’s achievement of adjusted earnings per share performance conditions.

Schedule of Share-Based Payment Award, Market Based Restricted Stock Awards, Valuation Assumptions

The assumptions used to value the awards are as follows:

	Six Months Ended
	March 31, 2023
Grant date stock price	$	56.15
Average stock price at the start of the performance period	$	54.12
Risk free interest rate	4.2%
Years to maturity	2.90
Expected volatility rate	52.4%
Expected dividend yield	—

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Income Taxes (Tables)

6 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Provision for Income Taxes and Effective Income Tax Rate

The provision for income taxes and effective income tax rate are as follows (in thousands, except percentages):

	Three Months Ended						Six Months Ended
	March 31, 2023			April 1, 2022			March 31, 2023			April 1, 2022
Income tax expense	$	11,660		$	1,569		$	21,271		$	3,026
Effective income tax rate	31.2		%	5.0		%	27.8		%	1.8		%

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Geographic and Significant Customer Information (Tables)

6 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Long-lived Assets by Geographic Areas

Information about net property and equipment in different geographic regions is presented below (in thousands):

	March 31, 2023		September 30, 2022
United States	$	117,606	$	108,569
Other Countries (1)	5,660		15,132
Total	$	123,266	$	123,701

(1)Other than the United States, no country represented greater than 10% of the total net property and equipment as of the dates presented.

Schedule of Revenue by Major Customers by Reporting Segments

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Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 169,406	$ 165,147	$ 349,510	$ 324,767
Contract liabilities	1,076		1,076		$ 3,916
Increase (decrease) in contract with customer liability			(2,840)
Amounts included in contract liabilities at the beginning of the period	1,400		$ 2,900
Net change in contract liabilities (percentage)			(73.00%)
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue	77,194	67,139
Data Center
Disaggregation of Revenue [Line Items]
Revenue	38,324	35,081
Telecom
Disaggregation of Revenue [Line Items]
Revenue	53,888	62,927
United States
Disaggregation of Revenue [Line Items]
Revenue	82,835	74,547	$ 171,423	148,973
China
Disaggregation of Revenue [Line Items]
Revenue	33,325	46,028	74,481	82,091
Asia Pacific, excluding China
Disaggregation of Revenue [Line Items]
Revenue	28,008	25,881	49,542	56,531
Other Countries
Disaggregation of Revenue [Line Items]
Revenue	$ 25,238	$ 18,691	54,064	37,172
Industrial & Defense
Disaggregation of Revenue [Line Items]
Revenue			154,363	140,285
Data Center
Disaggregation of Revenue [Line Items]
Revenue			79,810	65,733
Telecom
Disaggregation of Revenue [Line Items]
Revenue			$ 115,337	$ 118,749

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Acquisitions - Narrative (Details) $ in Thousands, € in Millions				3 Months Ended	6 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 03, 2023 USD ($)	Dec. 23, 2022 EUR (€)	Mar. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Apr. 01, 2022 USD ($)
Business Acquisition [Line Items]
Financing cash flows from finance leases					$ 591	$ 500
OMMIC SAS
Business Acquisition [Line Items]
Expected purchase price of acquisition | €			€ 38.5
Customer relationships
Business Acquisition [Line Items]
Intangible assets	$ 20,700			$ 20,700	20,700
Useful life of intangible assets (in years)	8 years 7 months 6 days
Technology
Business Acquisition [Line Items]
Intangible assets	$ 7,100			7,100	7,100
Useful life of intangible assets (in years)	7 years 7 months 6 days
Trade Names
Business Acquisition [Line Items]
Intangible assets	$ 1,800			1,800	1,800
Useful life of intangible assets (in years)	7 years 7 months 6 days
Linearizer Technology, Inc.
Business Acquisition [Line Items]
Cash consideration		$ 51,600
Transaction costs				1,900	1,900
Intangible assets	$ 29,600			29,600	$ 29,600
Option to purchase underlying asset		$ 3,800
Financing cash flows from finance leases				$ 200

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Acquisitions - Summary of Purchase Price For Acquisition, Allocations (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Goodwill	$ 324,610	$ 311,417
Linearizer Technology, Inc.
Business Acquisition [Line Items]
Current assets	11,726
Property and equipment	5,485
Intangible assets	29,600
Goodwill	12,332
Total assets acquired	59,143
Current liabilities	7,544
Total liabilities assumed	7,544
Purchase Price	$ 51,599

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Investments - Summary of Available for Sale Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 444,022		$ 444,022		$ 472,481
Gross Unrealized Holding Gains	52		52		5
Gross Unrealized Holding Losses	3,339		3,339		5,906
Aggregate Fair Value	440,735		440,735		466,580
Investment Income, Interest	5,100	$ 500	8,700	$ 800
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	140,151		140,151		146,163
Gross Unrealized Holding Gains	27		27		5
Gross Unrealized Holding Losses	2,999		2,999		4,492
Aggregate Fair Value	137,179		137,179		141,676
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	303,871		303,871		326,318
Gross Unrealized Holding Gains	25		25		0
Gross Unrealized Holding Losses	340		340		1,414
Aggregate Fair Value	$ 303,556		$ 303,556		$ 324,904

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Investments - Summary of Contractual Maturities of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Less than one year	$ 347,944	$ 368,141
Over one year	92,791	98,439
Total available-for-sale investments	$ 440,735	$ 466,580

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Investments - Other Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022	Dec. 23, 2021
Equity Securities without Readily Determinable Fair Value [Line Items]
Loss on equity method investment			$ 0	$ 114,908
Proceeds from sale of equity method investment			0	$ 127,750
Preferred Stock | Privately Held Manufacturing Company
Equity Securities without Readily Determinable Fair Value [Line Items]
Investment without readily determinable fair value	$ 2,500		$ 2,500		$ 2,500
Equity Securities | Private Company
Equity Securities without Readily Determinable Fair Value [Line Items]
Carrying value of investment						$ 9,500
Gain on sale of investment	$ 118,200
Equity Securities | Compute
Equity Securities without Readily Determinable Fair Value [Line Items]
Loss on equity method investment		$ 3,300
Private Company | Equity Securities
Equity Securities without Readily Determinable Fair Value [Line Items]
Noncontrolling interest ownership percentage		10.00%		10.00%

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Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 461,305	$ 467,972
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	137,179	141,676
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	20,570	1,392
Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	303,556	324,904
Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	20,570	1,392
Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Active Markets for Identical Assets (Level 1) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	20,570	1,392
Active Markets for Identical Assets (Level 1) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	440,735	466,580
Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	137,179	141,676
Observable Inputs (Level 2) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Observable Inputs (Level 2) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	303,556	324,904
Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	0	0
Unobservable Inputs (Level 3) | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 0	$ 0

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Inventories (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 83,057	$ 72,595
Work-in-process	16,990	12,455
Finished goods	31,835	29,910
Total inventory, net	$ 131,882	$ 114,960

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Property Plant and Equipment - Components of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 338,089	$ 329,631
Less accumulated depreciation and amortization	(214,823)	(205,930)
Property and equipment, net	123,266	123,701
Finance Lease, Right-of-Use Asset, Accumulated Amortization	6,700	5,800
Construction in process
Property, Plant and Equipment [Line Items]
Total property and equipment	14,318	10,837
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	229,125	227,844
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	35,288	35,651
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	2,601	2,535
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	18,519	18,347
Assets Held Under Finance Leases [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 38,238	$ 34,417

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Property Plant and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 5,800	$ 5,800	$ 11,800	$ 11,700
Accumulated depreciation	$ 214,823		$ 214,823		$ 205,930

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Intangible Assets - Summary of Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Finite-Lived Intangible Assets [Line Items]
Total	$ 6,752	$ 8,054	$ 13,565	$ 17,341
Cost of Revenue
Finite-Lived Intangible Assets [Line Items]
Total	988	1,778	1,898	4,283
Selling, General and Administrative
Finite-Lived Intangible Assets [Line Items]
Total	$ 5,764	$ 6,276	$ 11,667	$ 13,058

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Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Total	$ 458,304	$ 428,704
Total	458,304	428,704
Less accumulated amortization	(391,015)	(377,450)
Intangible assets — net	67,289	51,254
Developed technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	186,534	179,434
Less accumulated amortization	(177,100)	(175,200)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets	266,570	245,870
Less accumulated amortization	(213,900)	(202,300)
Trade Names | Trade Names
Finite-Lived Intangible Assets [Line Items]
Total	5,200	3,400
Total	$ 5,200	$ 3,400

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Intangible Assets - Summary of Activity in Intangible Assets and Goodwill (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill and Intangible Assets [Roll Forward]
Beginning Balance	$ 428,704
Acquired	29,600
Currency translation adjustment	0
Ending Balance	458,304
Finite-lived Intangible Assets [Roll Forward]
Acquired	29,600
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Beginning Balance	428,704
Acquired	29,600
Currency translation adjustment	0
Ending Balance	458,304
Goodwill [Roll Forward]
Balance at beginning of period	311,417
Acquired	12,332
Currency translation adjustment	861
Balance at end of period	324,610
Developed technology
Goodwill and Intangible Assets [Roll Forward]
Acquired	7,100
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	179,434
Acquired	7,100
Currency translation adjustment	0
Ending Balance	186,534
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Acquired	7,100
Customer relationships
Goodwill and Intangible Assets [Roll Forward]
Acquired	20,700
Finite-lived Intangible Assets [Roll Forward]
Beginning Balance	245,870
Acquired	20,700
Currency translation adjustment	0
Ending Balance	266,570
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Acquired	20,700
Trade Names | Trade Names
Goodwill and Intangible Assets [Roll Forward]
Beginning Balance	3,400
Acquired	1,800
Currency translation adjustment	0
Ending Balance	5,200
Finite-lived Intangible Assets [Roll Forward]
Acquired	1,800
Indefinite Lived Intangible Assets Rollforward [Roll Forward]
Beginning Balance	3,400
Acquired	1,800
Currency translation adjustment	0
Ending Balance	$ 5,200

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Intangible Assets - Summary of Estimated Amortization of Intangible Assets (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2023 Remaining	$ 14,295
2022	18,643
2023	7,381
2024	6,397
2025	5,842
Thereafter	11,331
Total	$ 63,889

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Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 391,015	$ 377,450
Developed technology
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	177,100	175,200
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 213,900	$ 202,300

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Debt - Schedule of Remaining Outstanding Balances on Term Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Principal Balance
Long-term debt	$ 570,766	$ 570,766
Long-term debt	$ 566,743	565,920
Long-term Debt
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Principal Balance
Long-term debt	$ 120,766	120,766
Less: Unamortized discount on term loans and deferred financing costs	$ (4,023)	$ (4,846)
Effective Interest Rate
Effective interest rate	6.88%	4.77%
Convertible Debt
Principal Balance
Long-term debt	$ 450,000	$ 450,000
Effective Interest Rate
Effective interest rate	0.54%	0.54%

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Debt - Additional Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Oct. 02, 2021 USD ($)	Mar. 25, 2021 USD ($) d renewal_option $ / shares	Mar. 31, 2023 USD ($)	Apr. 01, 2022 USD ($)	Mar. 31, 2023 USD ($)	Apr. 01, 2022 USD ($)	Sep. 30, 2022 USD ($)	Apr. 06, 2021 USD ($)
Debt Instrument [Line Items]
Long-term debt, remaining balance			$ 570,766		$ 570,766		$ 570,766
Accumulated deficit			(299,012)		(299,012)		(354,286)
Accumulated Deficit | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Accumulated deficit	$ 7,500
Long-term Debt
Debt Instrument [Line Items]
Principle amount			700,000		$ 700,000
Basis spread on variable rate					2.25%
Long-term debt, remaining balance			120,766		$ 120,766		120,766
Estimated fair value of Term Loans			120,300		120,300		120,200
Unamortized deferred financing costs			400		400
Convertible Notes Green Shoe
Debt Instrument [Line Items]
Principle amount								$ 50,000
Convertible Debt
Debt Instrument [Line Items]
Long-term debt, remaining balance			450,000		450,000		450,000
Convertible Senior Notes Due 2026
Debt Instrument [Line Items]
Principle amount		$ 400,000	450,000		450,000
Conversion price (in USD per share) | $ / shares		$ 82,120,000
Redemption price percentage		100.00%
Equity component of convertible notes, net	72,200
Interest expense debt			300	$ 300	600	$ 600
Future minimum principal payments			0		0
Convertible Senior Notes Due 2026 | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Principle amount	73,100
Convertible Senior Notes Due 2026 | Conversion Period One
Debt Instrument [Line Items]
Convertible threshold trading days | renewal_option		20,000,000
Threshold consecutive trading days | renewal_option		30,000,000
Convertible Senior Notes Due 2026 | Conversion Period Two
Debt Instrument [Line Items]
Convertible threshold trading days | d		5
Threshold consecutive trading days | d		5
Convertible Senior Notes Due 2026 | Conversion Price | Conversion Period One
Debt Instrument [Line Items]
Convertible threshold percentage of stock price trigger		130.00%
Convertible Senior Notes Due 2026 | Principal Trading Price | Conversion Period Two
Debt Instrument [Line Items]
Convertible threshold percentage of stock price trigger		98.00%
Convertible Senior Notes Due 2026 | Convertible Notes Payable
Debt Instrument [Line Items]
Basis spread on variable rate		0.25%
Estimated fair value of Term Loans			$ 472,500		$ 472,500		$ 411,400
Convertible Senior Notes Due 2026 | Convertible Debt
Debt Instrument [Line Items]
Conversion ratio					0.0121767
Convertible Senior Notes Due 2026 | Convertible Debt | Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Unamortized deferred financing costs	$ 900
Fed Funds Effective Rate Overnight Index Swap Rate | Term Loans
Debt Instrument [Line Items]
Basis spread on variable rate					0.50%
One Month London Interbank Offered Rate (LIBOR) | Long-term Debt
Debt Instrument [Line Items]
Basis spread on variable rate					1.00%
Minimum | Base Rate | Long-term Debt
Debt Instrument [Line Items]
Basis spread on variable rate					1.25%

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Financing Obligation (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022
Long-term Purchase Commitment [Line Items]
Property and equipment, net capitalized	$ 9,200	$ 9,800
Financing obligation for property, plant and equipment	9,700	$ 9,800
Future fixed payment	$ 16,800
Power generator life term	15 years
Implied discount rate	7.40%
2023	$ 468
Purchase Commitment
Long-term Purchase Commitment [Line Items]
Fixed payments	$ 27,200

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Financing Obligations - Summary of Expected Future Minimum Payments (Details) $ in Thousands	Mar. 31, 2023 USD ($)
Debt Disclosure [Abstract]
2023	$ 468
2024	958
2025	982
2026	1,007
2027	1,031
Thereafter	11,914
Total payments	16,360
Less: interest	6,688
Present value of liabilities	$ 9,672

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Stockholders' Equity - Additional Information (Details)	Mar. 31, 2023 $ / shares shares
Equity [Abstract]
Preferred stock, shares authorized | shares	10,000,000
Preferred stock, par value (in usd per share) | $ / shares	$ 0.001
Common stock, shares authorized | shares	300,000,000
Common stock, par value (in usd per share) | $ / shares	$ 0.001

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Earnings (Loss) Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Numerator:
Net income	$ 25,755	$ 29,558	$ 55,274	$ 168,385
Net income attributable to common stockholders	$ 25,755	$ 29,558	$ 55,274	$ 168,385
Denominator:
Weighted average common shares outstanding-basic	70,799	69,788	70,640	69,594
Dilutive effect of options and warrants (in shares)	603	1,319	748	1,572
Weighted average common shares outstanding-diluted	71,402	71,107	71,388	71,166

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Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation			$ 20,507	$ 19,916
Compensation cost not yet recognized	$ 70,400		$ 70,400
Unrecognized compensation cost period for recognition			2 years 1 month 6 days
Share-based compensation expense	9,460	$ 9,967	$ 20,507	19,916
Intrinsic value of options exercised	0			11,000
Years to maturity			3 years
Aggregate intrinsic value stock options outstanding	$ 800		$ 800
Number of stock options outstanding (in shares)	15,000		15,000
Weighted average exercise price per share (in dollars per share)	$ 16.06		$ 16.06
Weighted average remaining contractual term options outstanding			2 years 7 months 6 days
Incentive Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of outstanding awards	$ 4,500		$ 4,500		$ 4,900
Employee-related Liabilities	2,100		2,100		$ 3,600
Share-based compensation	$ 500	$ 900	$ 1,800	600
Restricted Stock Restricted Stock Units And Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vested (in shares)			1,338,000
Vested in period fair value			$ 81,300	$ 89,300
Granted (in shares)			751,000
Granted (in usd per share)			$ 63.25
Shares forfeited (in shares)			39,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Years to maturity			2 years 10 months 24 days
Market Based Performance Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			166,452
Granted (in usd per share)			$ 80.38
Shares forfeited (in shares)			0
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted			4 years
Minimum | Incentive Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of options granted			7 years
Maximum | Incentive Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
2012 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares)	4,600,000		4,600,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Available for grant (in shares)	1,300,000		1,300,000
Unrecognized compensation cost	$ 300		$ 300

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Share-Based Compensation - Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Non-Employees (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 9,460	$ 9,967	$ 20,507	$ 19,916
Cost of Revenue
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	1,011	1,073	2,161	2,106
Research and Development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	3,742	3,511	7,974	7,110
Selling, General and Administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total share-based compensation expense	$ 4,707	$ 5,383	$ 10,372	$ 10,700

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Share-Based Compensation - Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity (Details) - Restricted Stock Restricted Stock Units And Performance Based Restricted Stock Units shares in Thousands	6 Months Ended
	Mar. 31, 2023 $ / shares shares
Number of shares (in thousands)
Balance at beginning of period (in shares) | shares	1,872
Granted (in shares) | shares	751
Vested and released (in shares) | shares	(1,338)
Performance-based adjustment (in shares) | shares	311
Forfeited, canceled or expired (in shares) | shares	(39)
Balance at end of period (in shares) | shares	1,557
Weighted- Average Grant Date Fair Value
Balance at beginning of period (in usd per share) | $ / shares	$ 40.44
Granted (in usd per share) | $ / shares	63.25
Vested and released (in usd per share) | $ / shares	28.11
Performance-based adjustment (in usd per share) | $ / shares	27.13
Forfeited, canceled or expired (in usd per share) | $ / shares	47.46
Balance at end of period (in usd per share) | $ / shares	$ 59.23

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Share-Based Compensation - Fair Value of Market-Based PRSUs (Details)	6 Months Ended
	Mar. 31, 2023 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Years to maturity	3 years
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date stock price	$ 56.15
Average stock price at the start of the performance period	$ 54.12
Risk free interest rate	4.20%
Years to maturity	2 years 10 months 24 days
Expected volatility rate	52.40%
Expected dividend yield	0.00%

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Share-Based Compensation Share-Based Compensation Plans - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Number of Shares
Ending Balance Stock options outstanding (in shares) | shares	15,000
Weighted-Average Exercise Price per Share
Ending Balance weighted-average exercise price per share (in usd per share) | $ / shares	$ 16.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term options outstanding	2 years 7 months 6 days
Aggregate intrinsic value stock options outstanding | $	$ 800

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Income Taxes (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income tax expense	$ 11,660,000	$ 1,569,000	$ 21,271,000	$ 3,026,000
Effective income tax rate	31.20%	5.00%	27.80%	1.80%
Effective tax rate			21.00%
Unrecognized tax benefit	$ 0		$ 0		$ 0

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Geographic and Significant Customer Information - Additional Information (Details) - segment	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Apr. 01, 2022	Mar. 31, 2023	Apr. 01, 2022
Revenue from External Customer [Line Items]
Number of reportable operating segment			1
Top Ten Customers | Revenue | Customer Concentration Risk
Revenue from External Customer [Line Items]
Concentration risk, percentage	48.00%	48.00%	49.00%	45.00%

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Geographic and Significant Customer Information - Summary of Different Geographic Regions (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 123,266	$ 123,701
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	117,606	108,569
Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 5,660	$ 15,132

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Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2020-06 [Member]