Belden (BDC) 10-Q 31 Oct 24 2024 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 29, 2024	Oct. 29, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 29, 2024
Document Transition Report	false
Entity File Number	001-12561
Entity Registrant Name	BELDEN INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3601505
Entity Address, Address Line One	1 North Brentwood Boulevard,
Entity Address, Address Line Two	15th Floor,
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63105
City Area Code	314
Local Phone Number	854-8000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity File Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging growth company	false
Entity Shell Company	false
Title of 12(b) Security	Common stock, $0.01 par value
Trading Symbol	BDC
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		40,336,643
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000913142
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 29, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 322,982	$ 597,044
Receivables, net	430,176	413,806
Inventories, net	368,435	366,987
Other current assets	76,706	79,142
Total current assets	1,198,299	1,456,979
Property, plant and equipment, less accumulated depreciation	477,304	451,069
Operating lease right-of-use assets	132,844	89,686
Goodwill	1,056,549	907,331
Intangible assets, less accumulated amortization	406,207	269,144
Deferred income taxes	17,290	15,739
Other long-lived assets	51,958	50,243
Total assets	3,340,451	3,240,191
Current liabilities:
Accounts payable	306,745	343,215
Accrued liabilities	272,565	290,289
Total current liabilities	579,310	633,504
Long-term debt	1,218,965	1,204,211
Postretirement benefits	70,356	74,573
Deferred income taxes	88,272	49,472
Long-term operating lease liabilities	113,507	74,941
Other long-term liabilities	34,802	37,188
Stockholders’ equity:
Common stock	503	503
Additional paid-in capital	833,449	818,663
Retained earnings	1,119,684	985,807
Accumulated other comprehensive loss	(55,153)	(41,279)
Treasury stock	(663,272)	(597,437)
Total Belden stockholders’ equity	1,235,211	1,166,257
Noncontrolling interests	28	45
Total stockholders’ equity	1,235,239	1,166,302
Total liabilities and stockholders' equity	$ 3,340,451	$ 3,240,191

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Income Statement [Abstract]
Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Cost of sales	(410,922)	(385,639)	(1,122,531)	(1,212,240)
Gross profit	244,004	241,168	672,406	748,601
Selling, general and administrative expenses	(126,976)	(118,079)	(357,241)	(366,288)
Research and development expenses	(27,941)	(30,190)	(83,397)	(90,544)
Amortization of intangibles	(13,738)	(9,526)	(34,487)	(30,262)
Gain on sale of assets	0	12,056	0	12,056
Operating income	75,349	95,429	197,281	273,563
Interest expense, net	(10,855)	(8,580)	(27,454)	(25,593)
Non-operating pension benefit	286	328	747	1,462
Income before taxes	64,780	87,177	170,574	249,432
Income tax expense	(11,091)	(14,850)	(30,542)	(45,385)
Net income	53,689	72,327	140,032	204,047
Less: Net loss attributable to noncontrolling interest	(3)	(20)	(17)	(245)
Net income attributable to Belden stockholders	$ 53,692	$ 72,347	$ 140,049	$ 204,292
Weighted average number of common shares and equivalents:
Basic (in shares)	40,798	42,053	40,825	42,460
Diluted (in shares)	41,417	42,625	41,371	43,129
Basic income per share attributable to Belden stockholders (in usd per share)	$ 1.32	$ 1.72	$ 3.43	$ 4.81
Diluted income per share attributable to Belden stockholders (in usd per share)	$ 1.30	$ 1.70	$ 3.39	$ 4.74
Comprehensive income attributable to Belden	$ 23,760	$ 93,915	$ 126,175	$ 203,697
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.15	$ 0.15

CONDENSED CONSOLIDATED CASH FLO

CONDENSED CONSOLIDATED CASH FLOW STATEMENTS - USD ($) $ in Thousands	9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023
Cash flows from operating activities:
Net income	$ 140,032	$ 204,047
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	84,039	73,974
Share-based compensation	22,079	14,843
Gain on sale of assets	0	(12,056)
Changes in operating assets and liabilities, net of the effects of currency exchange rate changes, acquired businesses and disposals:
Receivables	3,244	(48,949)
Inventories	8,918	16,211
Accounts payable	(53,664)	(42,456)
Accrued liabilities	(24,410)	(43,318)
Income taxes	1,220	548
Other assets	(5,766)	(6,706)
Other liabilities	1,665	3,855
Net cash provided by operating activities	177,357	159,993
Cash flows from investing activities:
Cash used for business acquisitions, net of cash acquired	(295,591)	(106,712)
Capital expenditures	(70,759)	(61,870)
Proceeds from disposal of tangible assets	106	13,785
Proceeds from disposal of businesses, net of cash sold	0	9,300
Net cash used for investing activities	(366,244)	(145,497)
Cash flows from financing activities:
Payments under share repurchase program	(77,954)	(150,000)
Withholding tax payments for share-based payment awards	(8,930)	(17,309)
Cash dividends paid	(6,154)	(6,408)
Payments under financing lease obligations	(694)	(254)
Proceeds from issuance of common stock	8,917	6,568
Net cash used for financing activities	(84,815)	(167,403)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(360)	(3,798)
Decrease in cash and cash equivalents	(274,062)	(156,705)
Cash and cash equivalents, beginning of period	597,044	687,676
Cash and cash equivalents, end of period	$ 322,982	$ 530,971

CONDENSED CONSOLIDATED STOCKHOL

CONDENSED CONSOLIDATED STOCKHOLDERS’ EQUITY STATEMENTS - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests
Beginning balance (in shares) at Dec. 31, 2022		50,335
Beginning balance at Dec. 31, 2022	$ 1,143,950	$ 503	$ 825,669	$ 751,522	$ (428,812)	$ (5,871)	$ 939
Beginning balance (in shares) at Dec. 31, 2022					(7,502)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	62,945			63,192			(247)
Other comprehensive income (loss), net of tax	(17,298)					(17,300)	2
Common stock issuance	1,679		(420)		$ 2,099
Common stock issuance (in shares)					37
Retirement Savings Plan stock contributions	2,396		638		$ 1,758
Retirement Savings Plan stock contributions (in shares)					28
Exercise of stock options, net of tax withholding forfeitures	(2,596)		(4,547)		$ 1,951
Exercise of stock options, net of tax withholding forfeitures (in shares)					47
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(10,696)		(17,997)		$ 7,301
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)					196
Share repurchase program, net of excise tax (in shares)					(594)
Share repurchase program, net of excise tax	(50,266)				$ (50,266)
Share-based compensation	6,253		6,253
Common stock dividends	(2,150)			(2,150)
Ending balance (in shares) at Apr. 02, 2023		50,335
Ending balance at Apr. 02, 2023	1,134,217	$ 503	809,596	812,564	$ (465,969)	(23,171)	694
Ending balance (in shares) at Apr. 02, 2023					(7,788)
Beginning balance (in shares) at Dec. 31, 2022		50,335
Beginning balance at Dec. 31, 2022	1,143,950	$ 503	825,669	751,522	$ (428,812)	(5,871)	939
Beginning balance (in shares) at Dec. 31, 2022					(7,502)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	204,047
Ending balance (in shares) at Oct. 01, 2023		50,335
Ending balance at Oct. 01, 2023	1,199,403	$ 503	812,423	949,422	$ (556,343)	(6,605)	3
Ending balance (in shares) at Oct. 01, 2023					(8,660)
Beginning balance (in shares) at Apr. 02, 2023		50,335
Beginning balance at Apr. 02, 2023	1,134,217	$ 503	809,596	812,564	$ (465,969)	(23,171)	694
Beginning balance (in shares) at Apr. 02, 2023					(7,788)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	68,775			68,753			22
Other comprehensive income (loss), net of tax	(4,861)					(4,863)	2
Sale and deconsolidation of subsidiary	(834)					(139)	(695)
Retirement Savings Plan stock contributions	2,042		663		$ 1,379
Retirement Savings Plan stock contributions (in shares)					24
Exercise of stock options, net of tax withholding forfeitures	(1,931)		(2,698)		$ 767
Exercise of stock options, net of tax withholding forfeitures (in shares)					27
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(1,717)		(4,130)		$ 2,413
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)					55
Share repurchase program, net of excise tax (in shares)					(394)
Share repurchase program, net of excise tax	(36,463)				$ (36,463)
Share-based compensation	5,901		5,901
Common stock dividends	(2,138)			(2,138)
Ending balance (in shares) at Jul. 02, 2023		50,335
Ending balance at Jul. 02, 2023	1,162,991	$ 503	809,332	879,179	$ (497,873)	(28,173)	23
Ending balance (in shares) at Jul. 02, 2023					(8,076)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	72,327			72,347			(20)
Other comprehensive income (loss), net of tax	21,568					21,568
Common stock issuance	4,889		448		$ 4,441
Common stock issuance (in shares)					79
Retirement Savings Plan stock contributions	1,723		692		$ 1,031
Retirement Savings Plan stock contributions (in shares)					18
Exercise of stock options, net of tax withholding forfeitures	(309)		(620)		$ 311
Exercise of stock options, net of tax withholding forfeitures (in shares)					8
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(60)		(118)		$ 58
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)					1
Share repurchase program, net of excise tax (in shares)					(690)
Share repurchase program, net of excise tax	(64,311)				$ (64,311)
Share-based compensation	2,689		2,689
Common stock dividends	(2,104)			(2,104)
Ending balance (in shares) at Oct. 01, 2023		50,335
Ending balance at Oct. 01, 2023	1,199,403	$ 503	812,423	949,422	$ (556,343)	(6,605)	3
Ending balance (in shares) at Oct. 01, 2023					(8,660)
Beginning balance (in shares) at Dec. 31, 2023		50,335
Beginning balance at Dec. 31, 2023	1,166,302	$ 503	818,663	985,807	$ (597,437)	(41,279)	45
Beginning balance (in shares) at Dec. 31, 2023					(9,208)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	37,309			37,313			(4)
Other comprehensive income (loss), net of tax	9,148					9,148
Common stock issuance	3,152		477		$ 2,675
Common stock issuance (in shares)					48
Retirement Savings Plan stock contributions	1,828		641		$ 1,187
Retirement Savings Plan stock contributions (in shares)					22
Exercise of stock options, net of tax withholding forfeitures	(384)		(483)		$ 99
Exercise of stock options, net of tax withholding forfeitures (in shares)					8
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(7,537)		(10,991)		$ 3,454
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)					138
Share repurchase program, net of excise tax (in shares)					(675)
Share repurchase program, net of excise tax	(58,270)				$ (58,270)
Share-based compensation	6,397		6,397
Common stock dividends	(2,059)			(2,059)
Ending balance (in shares) at Mar. 31, 2024		50,335
Ending balance at Mar. 31, 2024	1,155,886	$ 503	814,704	1,021,061	$ (648,292)	(32,131)	41
Ending balance (in shares) at Mar. 31, 2024					(9,667)
Beginning balance (in shares) at Dec. 31, 2023		50,335
Beginning balance at Dec. 31, 2023	1,166,302	$ 503	818,663	985,807	$ (597,437)	(41,279)	45
Beginning balance (in shares) at Dec. 31, 2023					(9,208)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	140,032
Ending balance (in shares) at Sep. 29, 2024		50,335
Ending balance at Sep. 29, 2024	1,235,239	$ 503	833,449	1,119,684	$ (663,272)	(55,153)	28
Ending balance (in shares) at Sep. 29, 2024					(9,686)
Beginning balance (in shares) at Mar. 31, 2024		50,335
Beginning balance at Mar. 31, 2024	1,155,886	$ 503	814,704	1,021,061	$ (648,292)	(32,131)	41
Beginning balance (in shares) at Mar. 31, 2024					(9,667)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	49,034			49,044			(10)
Other comprehensive income (loss), net of tax	6,912					6,912
Retirement Savings Plan stock contributions	1,999		1,206		$ 793
Retirement Savings Plan stock contributions (in shares)					22
Exercise of stock options, net of tax withholding forfeitures	(97)		(194)		$ 97
Exercise of stock options, net of tax withholding forfeitures (in shares)					4
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(92)		(757)		$ 665
Conversion of restricted stock units into common stock, net of tax withholding forfeitures (in shares)					20
Adjustment to share repurchase excise tax	42				$ 42
Share-based compensation	8,246		8,246
Common stock dividends	(2,053)			(2,053)
Ending balance (in shares) at Jun. 30, 2024		50,335
Ending balance at Jun. 30, 2024	1,219,877	$ 503	823,205	1,068,052	$ (646,695)	(25,219)	31
Ending balance (in shares) at Jun. 30, 2024					(9,621)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	53,689			53,692			(3)
Other comprehensive income (loss), net of tax	(29,934)					(29,934)
Common stock issuance	5,765		2,613		$ 3,152
Common stock issuance (in shares)					88
Retirement Savings Plan stock contributions	1,467		940		$ 527
Retirement Savings Plan stock contributions (in shares)					15
Exercise of stock options, net of tax withholding forfeitures	(812)		(735)		$ (77)
Exercise of stock options, net of tax withholding forfeitures (in shares)					13
Conversion of restricted stock units into common stock, net of tax withholding forfeitures	(8)		(10)		$ 2
Share repurchase program, net of excise tax (in shares)					(181)
Share repurchase program, net of excise tax	(20,181)				$ (20,181)
Share-based compensation	7,436		7,436
Common stock dividends	(2,060)			(2,060)
Ending balance (in shares) at Sep. 29, 2024		50,335
Ending balance at Sep. 29, 2024	$ 1,235,239	$ 503	$ 833,449	$ 1,119,684	$ (663,272)	$ (55,153)	$ 28
Ending balance (in shares) at Sep. 29, 2024					(9,686)

CONDENSED CONSOLIDATED STOCKH_2

CONDENSED CONSOLIDATED STOCKHOLDERS’ EQUITY STATEMENTS (Parenthetical) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023	Sep. 29, 2024	Oct. 01, 2023
Statement of Stockholders' Equity [Abstract]
Common stock dividends declared per share (in usd per share)	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.15	$ 0.15

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 29, 2024
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2023: • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Supplementary Data contained in our 2023 Annual Report on Form 10-K. Business Description We are a leading global supplier of network infrastructure and digitization solutions built around two global businesses - Smart Infrastructure Solutions and Automation Solutions. As Belden continues to advance forward with solutions focused on data infrastructure, we renamed our two reportable segments during the three months ended September 29, 2024 from Enterprise Solutions and Industrial Automation Solutions to Smart Infrastructure Solutions and Automation Solutions, respectively. The composition of the segments did not change as a result of these name changes. Our mission is to build the foundation for a digital world that makes the digital journey simpler, smarter and secure. Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was March 31, 2024, the 91st day of our fiscal year 2024. Our fiscal second and third quarters each have 91 days. The nine months ended September 29, 2024 and October 1, 2023 included 273 and 274 days, respectively. Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and • Level 3 – Prices or valuations that require inputs that are both significant to the fair value measurement and unobservable. As of and during the three and nine months ended September 29, 2024 and October 1, 2023, we utilized Level 1 inputs to determine the fair value of cash equivalents. We did not have any transfers between Level 1 and Level 2 fair value measurements during the nine months ended September 29, 2024 and October 1, 2023. Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of September 29, 2024, we did not have any such cash equivalents on hand. The primary objective of our investment activities is to preserve our capital for the purpose of funding operations. We do not enter into investments for trading or speculative purposes. Contingent Liabilities We have established liabilities for environmental and legal contingencies that are probable of occurrence and reasonably estimable, the amounts of which are currently not material. We accrue environmental remediation costs based on estimates of known environmental remediation exposures developed in consultation with our environmental consultants and legal counsel. We are, from time to time, subject to routine litigation incidental to our business. Historically, these lawsuits have primarily involved claims for damages arising out of the use of our products, allegations of patent or trademark infringement, and litigation and administrative proceedings involving employment matters and commercial disputes. Based on facts currently available, we believe the disposition of the claims that are pending or asserted will not have a material adverse effect on our financial position, results of operations, or cash flow. As of September 29, 2024, we were party to standby letters of credit, surety bonds, and bank guaranties totaling $8.3 million, $6.0 million, and $5.3 million, respectively. Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2. Subsequent Events We evaluated subsequent events after the balance sheet date through the financial statement issuance date for appropriate accounting and disclosure. Noncontrolling Interest A Belden subsidiary includes a noncontrolling interest as of and for the periods ended September 29, 2024 and October 1, 2023 . The results attributable to the noncontrolling interest holders are not material to our condensed consolidated financial statements , and are presented as net income (loss) attributable to noncontrolling interests in the Condensed Consolidated Statements of Operations. Current Year Adoption of Accounting Pronouncements None of the accounting pronouncements that became effective during 2024 had a material impact to our condensed consolidated financial statements or disclosures. Pending Adoption of Recent Accounting Pronouncements The Financial Accounting Standards Board (FASB) amended the guidance in Accounting Standards Codification (ASC) 280, Segment Reporting , to require public companies disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The guidance is effective for public entities for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The guidance is applied retrospectively to all periods presented in the financial statements, unless it is impracticable. We did not early adopt this pronouncement, and we expect the amended guidance to have a minimal impact on our disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740) Improvements to Income Tax Disclosures (ASU 2023-09) enhancing the transparency and decision usefulness of income tax disclosures. ASU 2023-09 addresses investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendments in ASU 2023-09 are applied on a prospective basis, though retrospective application is permitted. We did not early adopt this pronouncement and are in the process of evaluating its impact on our consolidated financial statements and related disclosures. In March 2024, the SEC issued a final climate disclosure rule, which requires registrants to disclose climate-related information in registration statements and annual reports. The final rule also requires certain disclosures related to risk management and governance over climate-related risks, material climate targets and goals, and material Scope 1 and Scope 2 greenhouse gas emissions. For calendar year companies, the ruling requires certain disclosures in annual reports for the year ending December 31, 2025. On April 4, 2024, the SEC voluntarily stayed the final rule pending the completion of judicial review of cases pending in the Eighth Circuit. We are continuing to evaluate the impact of the final rule on our consolidated financial statements and disclosures.

Revenues

Revenues	9 Months Ended
	Sep. 29, 2024
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Revenues are recognized when control of the promised goods or services is transferred to our customers and in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. Taxes collected from customers and remitted to governmental authorities are not included in our revenues. The following tables present our revenues disaggregated by major product category. Broadband Automation Solutions Smart Buildings Solutions Total Three Months Ended September 29, 2024 (In thousands) Smart Infrastructure Solutions $ 174,467 $ — $ 145,180 $ 319,647 Automation Solutions — 335,279 — 335,279 Total $ 174,467 $ 335,279 $ 145,180 $ 654,926 Three Months Ended October 1, 2023 Smart Infrastructure Solutions $ 146,048 $ — $ 137,857 $ 283,905 Automation Solutions — 342,902 — 342,902 Total $ 146,048 $ 342,902 $ 137,857 $ 626,807 Nine Months Ended September 29, 2024 Smart Infrastructure Solutions $ 422,588 $ — $ 401,621 $ 824,209 Automation Solutions — 970,728 — 970,728 Total $ 422,588 $ 970,728 $ 401,621 $ 1,794,937 Nine Months Ended October 1, 2023 Smart Infrastructure Solutions $ 436,935 $ — $ 434,842 $ 871,777 Automation Solutions — 1,089,064 — 1,089,064 Total $ 436,935 $ 1,089,064 $ 434,842 $ 1,960,841 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended September 29, 2024 (In thousands) Smart Infrastructure Solutions $ 243,759 $ 45,480 $ 30,408 $ 319,647 Automation Solutions 196,326 87,733 51,220 335,279 Total $ 440,085 $ 133,213 $ 81,628 $ 654,926 Three Months Ended October 1, 2023 Smart Infrastructure Solutions $ 199,002 $ 51,476 $ 33,427 $ 283,905 Automation Solutions 195,154 92,189 55,559 342,902 Total $ 394,156 $ 143,665 $ 88,986 $ 626,807 Nine Months Ended September 29, 2024 Smart Infrastructure Solutions $ 610,992 $ 133,547 $ 79,670 $ 824,209 Automation Solutions 578,101 248,606 144,021 970,728 Total $ 1,189,093 $ 382,153 $ 223,691 $ 1,794,937 Nine Months Ended October 1, 2023 Smart Infrastructure Solutions $ 659,360 $ 125,595 $ 86,822 $ 871,777 Automation Solutions 624,219 303,165 161,680 1,089,064 Total $ 1,283,579 $ 428,760 $ 248,502 $ 1,960,841 We generate revenues primarily by selling products and delivering solutions that make the digital journey simpler, smarter, and secure. We also generate revenues from providing support and professional services. We sell our products to distributors, end-users, installers, and directly to original equipment manufacturers. At times, we enter into arrangements that involve the delivery of multiple performance obligations. For these arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price and recognized when or as each performance obligation is satisfied. Generally, we determine relative standalone selling price using the prices charged separately to customers on a standalone basis. Typically, payments are due after control transfers. Most of our performance obligations related to the sale of products are satisfied at a point in time when control of the product is transferred to the customer, which generally occurs when the product has been shipped or delivered from our facility to our customers, the customer has legal title to the product, and we have a present right to payment for the product. We also consider any customer acceptance clauses in determining when control has transferred to the customer and typically, these clauses are not substantive. The amount of consideration we receive and revenue we recognize varies due to rebates, returns, and price adjustments. We estimate the expected rebates, returns, and price adjustments based on an analysis of historical experience, anticipated sales demand, and trends in product pricing. For example, our estimate of price adjustments is based on our historical price adjustments as a percentage of revenues and the average time period between the original sale and the issuance of the price adjustment. We adjust our estimate of revenue for variable consideration at the earlier of when the most likely amount of consideration we expect to receive changes or when the consideration becomes fixed. We adjust other current assets and cost of sales for the estimated level of returns. Adjustments to revenue for performance obligations satisfied in prior periods were not significant during the three and nine months ended September 29, 2024 and October 1, 2023 . The following table presents estimated and accrued variable consideration: September 29, 2024 December 31, 2023 (in thousands) Accrued rebates included in accrued liabilities $ 41,719 $ 49,255 Accrued returns included in accrued liabilities 15,299 15,570 Price adjustments recognized against gross accounts receivable 29,461 26,005 Depending on the terms of an arrangement, we may defer the recognition of a portion of the consideration received because we have to satisfy a future performance obligation. Consideration allocated to support services under a support and maintenance contract is typically paid in advance and recognized ratably over the term of the service. Consideration allocated to professional services is recognized wh en or as the services are performed depending on the terms of the arrangement. Our contract terms for support, maintenance, and professional services typically require payment within one year or less of when the services will be provided. As of September 29, 2024, total deferred revenue was $29.1 million, and of this amount, $21.9 million is expected to be recognized within the next twelve months, and the remaining $7.2 million is long- term and is expected to be recognized over a period greater than twelve months. The following table presents deferred revenue activity during the three and nine months ended September 29, 2024 and October 1, 2023, respectively: 2024 2023 (In thousands) Beginning balance at January 1 $ 31,062 $ 33,243 New deferrals 6,280 4,359 Revenue recognized (7,392) (8,307) Balance at the end of Q1 $ 29,950 $ 29,295 New deferrals 11,058 6,900 Revenue recognized (11,395) (6,528) Balance at the end of Q2 $ 29,613 $ 29,667 New deferrals 14,714 9,146 Acquisitions 46 104 Revenue recognized (15,240) (11,224) Balance at the end of Q3 $ 29,133 $ 27,693 Service-type warra nties represent $9.8 million of the deferred revenue balance at September 29, 2024, and of this amount $5.1 million is expected to be recognized in the next twelve months, and the remaining $4.7 million is long-term and will be recognized over a period greater than twelve months. As of September 29, 2024 and December 31, 2023, we did not have any material contract assets recorded in the Condensed Consolidated Balance Sheets. We expense sales commissions as incurred when the duration of the related revenue arrangement is one year or less. We capitalize sales commissions when the original duration of the related revenue arrangement is longer than one year, and we amortize it over the related revenue arrangement period. Capitalized sales commissions as of September 29, 2024 and December 31, 2023 were not material. The following table presents sales commissions that are recorded within selling, general and administrative expenses: Three Months Ended Nine Months ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Sales commissions $ 6,865 $ 4,729 $ 18,036 $ 16,819

Acquisitions

Acquisitions	9 Months Ended
	Sep. 29, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Acquisitions	Acquisitions On September 16, 2024, we acquired Voleatech GmbH ("Voleatech") with cash on hand for €5.0 million ($5.6 million), net of cash acquired. The acquisition includes a potential earn-out up to €3.0 million based upon certain targets over three years, which will be accounted for as compensation cost.Voleatech, based in Germany, is known for their VT AIR Next Gen Firewall and expands Belden's Firewall product portfolio and overall planning of security in OT (Operational Technology) networking. Voleatech is reported within the Automation Solutions segment and is not material to our financial position or results of operations. On June 30, 2024, we acquired Precision Optical Technologies, Inc. (“Precision”) with cash on hand for $289.6 million, net of cash acquired. Precision, based in New York, is a leading supplier of value-added optical transceivers with proprietary software, firmware configurations, and related components. Precision is reported within the Smart Infrastructure Solutions segment. The following table summarizes the estimated, preliminary fair values of the assets acquired and liabilities assumed for Precision as of the acquisition date (in thousands): Receivables $ 18,562 Inventory 9,215 Other current assets 2,352 Property, plant and equipment 5,330 Intangible assets 162,000 Goodwill 144,690 Operating lease right-of-use assets 3,272 Total assets acquired $ 345,421 Accounts payable $ 11,452 Accrued liabilities 3,922 Deferred income taxes 37,507 Long-term operating lease liabilities 2,950 Total liabilities assumed $ 55,831 Net assets $ 289,590 The above purchase price allocation is preliminary and subject to revision as additional information about the fair value of individual assets and liabilities becomes available. The preliminary measurement of receivables, inventory, intangible assets, goodwill, deferred income taxes, and other assets and liabilities are subject to change. A change in the estimated fair value of the net assets acquired will change the amount of the purchase price allocated to goodwill. The preliminary fair value of acquired receivables is $18.6 million , which is equivalent to its gross contractual amount. A single estimate of fair value results from a complex series of judgments about future events and uncertainties and relies heavily on estimates and assumptions. The judgments we have used in estimating the preliminary fair values assigned to each class of acquired assets and assumed liabilities could materially affect the results of our operations. For purposes of the above allocation, we based our preliminary estimate of the fair values for intangible assets on valuation studies performed by a third party valuation firm. We used various valuation methods including discounted cash flows, lost income, excess earnings, and relief from royalty to estimate the preliminary fair value of the identifiable intangible assets (Level 3 valuation). Goodwill and other intangible assets reflected above were determined to meet the criteria for recognition apart from tangible assets acquired and liabilities assumed. The goodwill is primarily attributable to the expansion of Belden’s solution selling capabilities, particularly the ability to offer more complete fiber infrastructure solutions. Our tax basis in the acquired goodwill is zero. The intangible assets related to the acquisition consisted of the following: Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 24,700 5.0 Customer relationships 122,800 20.0 Trademarks 3,100 2.5 Non-compete agreements 11,400 5.0 Total intangible assets subject to amortization $ 162,000 Intangible assets not subject to amortization: Goodwill $ 144,690 n/a Total intangible assets not subject to amortization $ 144,690 Total intangible assets $ 306,690 Weighted average amortization period 16.3 The amortizable intangible assets reflected in the table above were determined by us to have finite lives. The useful life for the developed technology intangible asset was based on the estimated time that the technology provides us with a competitive advantage and thus approximates the period and pattern of consumption of the intangible asset. The useful life for the customer relationship intangible asset was based on our forecasts of estimated sales from recurring customers. The useful life for the trademarks was based on the period of time we expect to continue to go to market using the trademarks. Our consolidated revenues and income before taxes for the three and nine months ended September 29, 2024 included $34.4 million and $1.2 million, respectively, from Precision. For the three and nine months ended September 29, 2024, income before taxes included $4.1 million of severance and other restructuring costs, $3.7 million of amortization of intangible assets, and $0.3 million of cost of sales related to the adjustment of acquired inventory to fair value for Precision. The following table illustrates the unaudited pro forma effect on operating results as if the Precision acquisition had been completed as of January 1, 2023. Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands, except per share data) (Unaudited) Revenues $ 654,926 $ 667,789 $ 1,865,778 $ 2,057,521 Net income attributable to Belden stockholders 57,021 74,122 140,744 200,609 Diluted income per share attributable to Belden stockholders $ 1.38 $ 1.74 $ 3.40 $ 4.65 The above unaudited pro forma financial information is presented for informational purposes only and does not purport to represent what our results of operations would have been had we completed the acquisition on the date assumed, nor is it necessarily indicative of the results that may be expected in future periods. Pro forma adjustments exclude cost savings from any synergies resulting from the acquisition.

Reportable Segments

Reportable Segments	9 Months Ended
	Sep. 29, 2024
Segment Reporting [Abstract]
Reportable Segments	Reportable Segments We are organized around two global businesses: Smart Infrastructure Solutions and Automation Solutions. As Belden continues to advance forward with solutions focused on data infrastructure, we renamed our two reportable segments during the three months ended September 29, 2024 from Enterprise Solutions and Industrial Automation Solutions to Smart Infrastructure Solutions and Automation Solutions, respectively. The composition of the segments did not change as a result of these name changes. Each of the global businesses represents a reportable segment. The key measures of segment profit or loss are Segment Revenues and Segment EBITDA. Segment Revenues represent non-affiliate revenues. Segment EBITDA excludes certain items, including depreciation expense; amortization of intangibles; asset impairment; severance, restructuring, and acquisition integration costs; adjustments related to acquisitions and divestitures; and other costs. We allocate corporate expenses to the segments for purposes of measuring Segment EBITDA. Corporate expenses are allocated on the basis of each segment’s relative EBITDA prior to the allocation. Our measure of segment assets does not include cash, goodwill, intangible assets, deferred tax assets, or corporate assets. All goodwill is allocated to reporting units of our segments for purposes of impairment testing. Inter-company revenues between our segments is not material. Smart Infrastructure Solutions Automation Solutions Total Segments (In thousands) As of and for the three months ended September 29, 2024 Segment Revenues $ 319,647 $ 335,279 $ 654,926 Segment EBITDA 40,447 71,819 112,266 Depreciation expense 6,758 7,897 14,655 Amortization of intangibles 8,738 5,000 13,738 Amortization of software development intangible assets — 2,678 2,678 Severance, restructuring, and acquisition integration costs 4,619 644 5,263 Adjustments related to acquisitions and divestitures 263 298 561 Segment assets 686,960 772,740 1,459,700 As of and for the three months ended October 1, 2023 Segment Revenues $ 283,905 $ 342,902 $ 626,807 Segment EBITDA 37,693 77,244 114,937 Depreciation expense 6,632 6,810 13,442 Amortization of intangibles 4,468 5,058 9,526 Amortization of software development intangible assets — 1,963 1,963 Severance, restructuring, and acquisition integration costs 3,453 2,622 6,075 Adjustments related to acquisitions and divestitures 197 298 495 Segment assets 625,356 698,287 1,323,643 As of and for the nine months ended September 29, 2024 Segment revenues $ 824,209 $ 970,728 $ 1,794,937 Segment EBITDA 97,691 198,301 295,992 Depreciation expense 19,277 22,420 41,697 Amortization of intangibles 19,479 15,008 34,487 Amortization of software development intangible assets — 7,855 7,855 Severance, restructuring, and acquisition integration costs 8,518 4,950 13,468 Adjustments related to acquisitions and divestitures 263 894 1,157 Segment assets 686,960 772,740 1,459,700 As of and for the nine months ended October 1, 2023 Segment Revenues $ 871,777 $ 1,089,064 $ 1,960,841 Segment EBITDA 118,854 229,662 348,516 Depreciation expense 18,779 19,699 38,478 Amortization of intangibles 15,171 15,091 30,262 Amortization of software development intangible assets — 5,235 5,235 Severance, restructuring, and acquisition integration costs 5,147 6,699 11,846 Adjustments related to acquisitions and divestitures 522 520 1,042 Segment assets 625,356 698,287 1,323,643 The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Total Segment and Consolidated Revenues $ 654,926 $ 626,807 $ 1,794,937 $ 1,960,841 Total Segment EBITDA $ 112,266 $ 114,937 $ 295,992 $ 348,516 Depreciation expense (14,655) (13,442) (41,697) (38,478) Amortization of intangibles (13,738) (9,526) (34,487) (30,262) Severance, restructuring, and acquisition integration costs (1) (5,263) (6,075) (13,468) (11,846) Amortization of software development intangible assets (2,678) (1,963) (7,855) (5,235) Adjustments related to acquisitions and divestitures (2) (561) (495) (1,157) (1,042) Eliminations (22) (63) (47) (146) Gain on sale of asset — 12,056 — 12,056 Consolidated operating income 75,349 95,429 197,281 273,563 Interest expense, net (10,855) (8,580) (27,454) (25,593) Total non-operating pension benefit 286 328 747 1,462 Consolidated income before taxes $ 64,780 $ 87,177 $ 170,574 $ 249,432 (1) Includes costs associated with acquisitions and manufacturing footprint actions.

Income per Share

Income per Share	9 Months Ended
	Sep. 29, 2024
Earnings Per Share [Abstract]
Income per Share	Income per Share The following table presents the basis for the income per share computations: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Numerator: Net income $ 53,689 $ 72,327 $ 140,032 $ 204,047 Less: Net loss attributable to noncontrolling interest (3) (20) (17) (245) Net income attributable to Belden stockholders $ 53,692 $ 72,347 $ 140,049 $ 204,292 Denominator: Weighted average shares outstanding, basic 40,798 42,053 40,825 42,460 Effect of dilutive common stock equivalents 619 572 546 669 Weighted average shares outstanding, diluted 41,417 42,625 41,371 43,129 For both the three and nine months ended September 29, 2024, diluted weighted average shares outstanding do not include outstanding equity awards of 0.1 million because they are anti-dilutive. For the three and nine months ended October 1, 2023, diluted weighted average shares outstanding do not include outstanding equity awards of 0.1 million and 0.2 million, respectively, because they are anti-dilutive. In addition, for the three and nine months ended September 29, 2024, diluted weighted average shares outstanding do not include outstanding equity awards of 0.2 million and 0.3 million, respectively, because the related performance conditions have not been satisfied. Fo r the three and nine months ended October 1, 2023, diluted weighted average shares outstanding do not include outstanding equity awards of 0.2 million and 0.3 million, respectively, because the related performance conditions have not been satisfied. For purposes of calculating basic earnings per share, unvested restricted stock units are not included in the calculation of basic weighted average shares outstanding until all necessary conditions have been satisfied and issuance of the shares underlying the restricted stock units is no longer contingent. Necessary conditions are not satisfied until the vesting date, at which time holders of our restricted stock units receive shares of our common stock. For purposes of calculating diluted earnings per share, unvested restricted stock units are included to the extent that they are dilutive. In determining whether unvested restricted stock units are dilutive, each issuance of restricted stock units is considered separately. Once a restricted stock unit has vested, it is included in the calculation of both basic and diluted weighted average shares outstanding.

Credit Losses

Credit Losses	9 Months Ended
	Sep. 29, 2024
Credit Loss [Abstract]
Credit Losses	Credit Losses We are exposed to credit losses primarily through sales of products and services. Our expected loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers' trade accounts receivables. Due to the short-term nature of such receivables, the estimated amount of accounts receivable that may not be collected is based on aging of the accounts receivable balances and the financial condition of customers. Additionally, specific allowance amounts are established to record the appropriate provision for customers that have a higher probability of default. Our monitoring activities include timely account reconciliation, dispute resolution, payment confirmation, consideration of customers' financial condition and macroeconomic conditions. Balances are written off when determined to be uncollectible. Provisions and recoveries are included in selling, general and administrative expenses. The following table presents the activity in the trade receivables allowance for doubtful accounts for the three and nine months ended September 29, 2024 and October 1, 2023, respectively: 2024 2023 (In thousands) Beginning balance at January 1 $ 23,114 $ 7,954 Current period provision 459 4,004 Recoveries collected (6) — Write-offs (96) (3) Fx impact (51) (25) Q1 ending balance $ 23,420 $ 11,930 Current period provision 638 4,194 Acquisitions 50 19 Recoveries collected — (8) Fx impact (44) 11 Write-offs (5) — Q2 ending balance $ 24,059 $ 16,146 Current period provision 79 4,933 Fx impact 140 (72) Write-offs (48) (31) Recoveries collected (1) (824) Q3 ending balance $ 24,229 $ 20,152

Inventories

Inventories	9 Months Ended
	Sep. 29, 2024
Inventory Disclosure [Abstract]
Inventories	Inventories The following table presents the major classes of inventories as of September 29, 2024 and December 31, 2023 , respectively: September 29, 2024 December 31, 2023 (In thousands) Raw materials $ 202,242 $ 185,233 Work-in-process 44,515 41,197 Finished goods 193,543 208,425 Gross inventories 440,300 434,855 Excess and obsolete reserves (71,865) (67,868) Net inventories $ 368,435 $ 366,987

Leases

Leases	9 Months Ended
	Sep. 29, 2024
Leases [Abstract]
Leases	Leases We have operating and finance leases for properties, including manufacturing facilities, warehouses, and office space; as well as vehicles and equipment. We make certain judgments in determining whether a contract contains a lease in accordance with ASU 2016-02. Our leases have remaining lease terms within 1 to 20 years; some of which include extension and termination options. We do not assume renewals in our determination of the lease term unless the renewals are deemed to be reasonably certain as of the commencement date of the lease. We have a few short-term operating leases with terms less than twelve months - these leases are not recorded on our balance sheet and the overall rent expense is not material. We also have certain lease contracts that contain both lease and non-lease components. We have elected the practical expedient to account for these components together as a single, combined lease component. T he rate implicit in most of our leases is not readily determinable. As a result, we utilize the incremental borrowing rate to determine the present value of the lease payments, which is unique to each leased asset, and is based upon the term of the lease, commencement date of the lease, local currency of the leased asset, and the credit rating of the legal entity leasing the asset. Our lease agreements do not contain material residual value guarantees. Our variable lease expense was approximately $0.9 million and $2.7 million for the three and nine months ended September 29, 2024, respectively, and $0.8 million and $2.4 million for the t hree and nine months ended October 1, 2023, respectively. The components of lease expense were as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Operating lease cost $ 6,893 $ 5,568 $ 20,686 $ 16,500 Finance lease cost Amortization of right-of-use asset $ 188 $ 187 $ 572 $ 578 Interest on lease liabilities 167 75 385 232 Total finance lease cost $ 355 $ 262 $ 957 $ 810 Supplemental cash flow information related to leases was as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,423 $ 4,674 $ 15,926 $ 13,964 Operating cash flows from finance leases were not material during the three and nine months ended September 29, 2024 and October 1, 2023 . Supplemental balance sheet information related to leases was as follows: September 29, 2024 December 31, 2023 (In thousands) Operating leases: Total operating lease right-of-use assets $ 132,844 $ 89,686 Accrued liabilities $ 20,984 $ 18,226 Long-term operating lease liabilities 113,507 74,941 Total operating lease liabilities $ 134,491 $ 93,167 Finance leases: Other long-lived assets, at cost $ 8,294 $ 6,560 Accumulated depreciation (1,928) (1,347) Other long-lived assets, net $ 6,366 $ 5,213 Accrued liabilities $ 1,057 $ 719 Other long-term liabilities 6,692 6,084 Total finance lease liabilities $ 7,749 $ 6,803 The increases in operating lease right-of-use assets and lease liabilities are primarily due to the recognition of a new lease that had balances of $33.8 million and $33.3 million, respectively, as of September 29, 2024. September 29, 2024 December 31, 2023 Weighted Average Remaining Lease Term Operating leases 10 years 6 years Finance leases 7 years 9 years Weighted Average Discount Rate Operating leases 5.9 % 5.0 % Finance leases 4.6 % 4.3 % In addition, we guaranteed the lease payments for certain property leases of a former subsidiary with expiration dates extending up to 2035. These lease guarantees were retained by Belden and not transferred to the buyer of the former subsidiary. As of September 29, 2024, the fixed, remaining base rent payments were approximately $21 million. As of September 29, 2024 and December 31, 2023, we had a liability for expected, future payments of $9.6 million and $11.3 million, respectively. The liability is based on certain assumptions, such as receiving a level of sublease income, that we continually reassess on an ongoing basis. We will update the estimated liability balance for changes in assumptions as needed.
Leases	Leases We have operating and finance leases for properties, including manufacturing facilities, warehouses, and office space; as well as vehicles and equipment. We make certain judgments in determining whether a contract contains a lease in accordance with ASU 2016-02. Our leases have remaining lease terms within 1 to 20 years; some of which include extension and termination options. We do not assume renewals in our determination of the lease term unless the renewals are deemed to be reasonably certain as of the commencement date of the lease. We have a few short-term operating leases with terms less than twelve months - these leases are not recorded on our balance sheet and the overall rent expense is not material. We also have certain lease contracts that contain both lease and non-lease components. We have elected the practical expedient to account for these components together as a single, combined lease component. T he rate implicit in most of our leases is not readily determinable. As a result, we utilize the incremental borrowing rate to determine the present value of the lease payments, which is unique to each leased asset, and is based upon the term of the lease, commencement date of the lease, local currency of the leased asset, and the credit rating of the legal entity leasing the asset. Our lease agreements do not contain material residual value guarantees. Our variable lease expense was approximately $0.9 million and $2.7 million for the three and nine months ended September 29, 2024, respectively, and $0.8 million and $2.4 million for the t hree and nine months ended October 1, 2023, respectively. The components of lease expense were as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Operating lease cost $ 6,893 $ 5,568 $ 20,686 $ 16,500 Finance lease cost Amortization of right-of-use asset $ 188 $ 187 $ 572 $ 578 Interest on lease liabilities 167 75 385 232 Total finance lease cost $ 355 $ 262 $ 957 $ 810 Supplemental cash flow information related to leases was as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,423 $ 4,674 $ 15,926 $ 13,964 Operating cash flows from finance leases were not material during the three and nine months ended September 29, 2024 and October 1, 2023 . Supplemental balance sheet information related to leases was as follows: September 29, 2024 December 31, 2023 (In thousands) Operating leases: Total operating lease right-of-use assets $ 132,844 $ 89,686 Accrued liabilities $ 20,984 $ 18,226 Long-term operating lease liabilities 113,507 74,941 Total operating lease liabilities $ 134,491 $ 93,167 Finance leases: Other long-lived assets, at cost $ 8,294 $ 6,560 Accumulated depreciation (1,928) (1,347) Other long-lived assets, net $ 6,366 $ 5,213 Accrued liabilities $ 1,057 $ 719 Other long-term liabilities 6,692 6,084 Total finance lease liabilities $ 7,749 $ 6,803 The increases in operating lease right-of-use assets and lease liabilities are primarily due to the recognition of a new lease that had balances of $33.8 million and $33.3 million, respectively, as of September 29, 2024. September 29, 2024 December 31, 2023 Weighted Average Remaining Lease Term Operating leases 10 years 6 years Finance leases 7 years 9 years Weighted Average Discount Rate Operating leases 5.9 % 5.0 % Finance leases 4.6 % 4.3 % In addition, we guaranteed the lease payments for certain property leases of a former subsidiary with expiration dates extending up to 2035. These lease guarantees were retained by Belden and not transferred to the buyer of the former subsidiary. As of September 29, 2024, the fixed, remaining base rent payments were approximately $21 million. As of September 29, 2024 and December 31, 2023, we had a liability for expected, future payments of $9.6 million and $11.3 million, respectively. The liability is based on certain assumptions, such as receiving a level of sublease income, that we continually reassess on an ongoing basis. We will update the estimated liability balance for changes in assumptions as needed.

Long-Lived Assets

Long-Lived Assets	9 Months Ended
	Sep. 29, 2024
Property, Plant and Equipment [Abstract]
Long-Lived Assets	Long-Lived Assets Depreciation and Amortization Expense We recognized depreciation expense of $14.7 million and $41.7 million in the three and nine months ended September 29, 2024, respectively, and $13.4 million and $38.5 million in the three and nine months ended October 1, 2023, respectively. We recognized amortization expense of $16.4 million and $42.3 million in the three and nine months ended September 29, 2024, respectively, and $11.5 million and $35.5 million in the three and nine months ended October 1, 2023, respectively. Gain on Sale of Assets During the three and nine months ended October 1, 2023, we sold our property in Ontario, Canada as part of a sale and leaseback transaction for $13.8 million, net of transaction costs and recognized a $12.1 million pre-tax gain on sale. This gain on sale was excluded from Segment EBITDA for our Automation Solutions segment.

Long-Term Debt and Other Borrow

Long-Term Debt and Other Borrowing Arrangements	9 Months Ended
	Sep. 29, 2024
Debt Disclosure [Abstract]
Long-Term Debt and Other Borrowing Arrangements	Long-Term Debt and Other Borrowing Arrangements The carrying values of our long-term debt were as follows: September 29, 2024 December 31, 2023 (In thousands) Revolving credit agreement due 2026 $ — $ — Senior subordinated notes: 3.375% Senior subordinated notes due 2027 502,380 497,025 3.875% Senior subordinated notes due 2028 390,740 386,575 3.375% Senior subordinated notes due 2031 334,920 331,350 Total senior subordinated notes 1,228,040 1,214,950 Less unamortized debt issuance costs (9,075) (10,739) Long-term debt $ 1,218,965 $ 1,204,211 Revolving Credit Agreement due 2026 We have a $300.0 million multi-currency asset-based revolving credit facility (the Revolver). The maturity date of the Revolver is June 2, 2026. The borrowing base under the Revolver includes eligible accounts receivable; inventory; and property, plant and equipment of certain of our subsidiaries in the United States, Canada, Germany, the United Kingdom and the Netherlands. Interest on outstanding borrowings is variable, based upon SOFR or other similar indices in foreign jurisdictions, plus a spread that ranges from 1.25%-1.75%, depending upon our leverage position. Outstanding borrowings in the U.S. and Canada may also, at our election, be priced on a base rate plus a spread that ranges from 0.25% — 0.75%, depending on our leverage position. We pay a commitment fee on the total commitments of 0.25%. In the event that we borrow more than 90% of our combined borrowing base or our borrowing base availability is less than $20.0 million, we are subject to a fixed charge coverage ratio covenant. As of September 29, 2024, we had no borrowings outstanding on the Revolver, and our available borrowing capacity was $291.4 million. Senior Subordinated Notes We have outstanding €450.0 million aggregate principal amount of 3.375% senior subordinated notes due 2027 (the 2027 Notes). The carrying value of the 2027 Notes as of September 29, 2024 is $502.4 million. The 2027 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2027 Notes rank equal in right of payment with our senior subordinated notes due 2031 and 2028 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on January 15 and July 15 of each year. We have outstanding €350.0 million aggregate principal amount of 3.875% senior subordinated notes due 2028 (the 2028 Notes). The carrying value of the 2028 Notes as of September 29, 2024 is $390.7 million. The 2028 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2028 Notes rank equal in right of payment with our senior subordinated notes due 2031 and 2027 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantors, including our Revolver. Interest is payable semiannually on March 15 and September 15 of each year. We have outstanding €300.0 million aggregate principal amount of 3.375% senior subordinated notes due 2031 (the 2031 Notes). The carrying value of the 2031 Notes as of September 29, 2024 is $334.9 million. The 2031 Notes are guaranteed on a senior subordinated basis by our current and future domestic subsidiaries. The 2031 Notes rank equal in right of payment with our senior subordinated notes due 2028 and 2027 and with any future subordinated debt, and they are subordinated to all of our senior debt and the senior debt of our subsidiary guarantor s, including our Revolver. Interest is payable semiannually on January 15 and July 15 of each year. Fair Value of Long-Term Debt

Net Investment Hedge

Net Investment Hedge	9 Months Ended
	Sep. 29, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net Investment Hedge	Net Investment Hedge All of our euro denominated notes were issued by Belden Inc., a USD functional currency entity. As of September 29, 2024, €567.8 million o f our outstanding foreign denominated debt is designated as a net investment hedge on the foreign currency risk of our net investment

Income Taxes

Income Taxes	9 Months Ended
	Sep. 29, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and nine months ended September 29, 2024, we recognized income tax expense of $11.1 million and $30.5 million, respectively, representing effective tax rates of 17.1% and 17.9%, respectively . For the three and nine months ended October 1, 2023 , we recognized income tax expense of $14.9 million and $45.4 million, respectively, representing effective tax rates of 17.0% and 18.2%, respectively.

Pension and Other Postretiremen

Pension and Other Postretirement Obligations	9 Months Ended
	Sep. 29, 2024
Retirement Benefits [Abstract]
Pension and Other Postretirement Obligations	Pension and Other Postretirement Obligations The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Three Months Ended Service cost $ 797 $ 522 $ 10 $ 3 Interest cost 3,723 3,838 235 253 Expected return on plan assets (4,147) (4,038) — — Amortization of prior service cost 46 45 — — Actuarial gains (27) (234) (116) (192) Net periodic benefit cost $ 392 $ 133 $ 129 $ 64 Nine Months Ended Service cost $ 2,284 $ 2,056 $ 30 $ 6 Interest cost 11,059 11,392 708 756 Expected return on plan assets (12,221) (12,476) — — Amortization of prior service cost 135 132 — — Actuarial gains (79) (692) (349) (574) Net periodic benefit cost $ 1,178 $ 412 $ 389 $ 188

Comprehensive Income and Accumu

Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 29, 2024
Equity [Abstract]
Comprehensive Income and Accumulated Other Comprehensive Income (Loss)	Comprehensive Income and Accumulated Other Comprehensive Income (Loss) The following table summarizes total comprehensive income: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Net income $ 53,689 $ 72,327 $ 140,032 $ 204,047 Foreign currency translation adjustments, net of tax (29,859) 21,852 (13,653) 257 Adjustments to pension and postretirement liability, net of tax (73) (284) (221) (848) Total comprehensive income 23,757 93,895 126,158 203,456 Less: Comprehensive loss attributable to noncontrolling interests (3) (20) (17) (241) Comprehensive income attributable to Belden $ 23,760 $ 93,915 $ 126,175 $ 203,697 The tax impacts of the foreign currency translation adjustments and pension liability adjustments in the table above are not material. The accumulated balances related to each component of other comprehensive loss, net of tax, are as follows: Foreign Pension and Accumulated Other (In thousands) Balance at December 31, 2023 $ (26,514) $ (14,765) $ (41,279) Other comprehensive loss attributable to Belden before reclassifications (13,653) — (13,653) Amounts reclassified from accumulated other comprehensive loss — (221) (221) Net current period other comprehensive loss attributable to Belden (13,653) (221) (13,874) Balance at September 29, 2024 $ (40,167) $ (14,986) $ (55,153) The following table summarizes the effects of reclassifications from accumulated other comprehensive loss for the nine months ended September 29, 2024: Amounts Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial gains $ (428) (1) Prior service cost 135 (1) Total before tax (293) Tax expense 72 Total net of tax $ (221)

Share Repurchase

Share Repurchase	9 Months Ended
	Sep. 29, 2024
Equity [Abstract]
Share Repurchase	Share Repurchase We have a share repurchase program which allows us to purchase our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. This program is funded with cash on hand and cash flows from operating activities. During September 2024, our Board of Directors increased the authorizations under this program by $300.0 million. During the three months ended September 29, 2024, we repurchased 0.2 million shares of our common stock for an aggregate cost of $20.1 million at an average price per share of $110.84. During the nine months ended September 29, 2024, we repurchased 0.9 million shares of our common stock for an aggregate cost of $78.0 million at an average price per share of $90.98. During the three months ended October 1, 2023, we repurchased 0.7 million shares of our common stock for an aggregate cost of $63.8 million at an average price per share of $92.46. During the nine months ended October 1, 2023, we repurchased 1.7 million shares of our common stock for an aggregate cost of $150.0 million at an average price per share of $89.42. Subsequent to September 29, 2024, we repurchased 0.3 million shares of our common stock for an aggregate cost of $37.6 million at an average price per share of $116.90. As of the da

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 53,692	$ 72,347	$ 140,049	$ 204,292

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 29, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 29, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying Condensed Consolidated Financial Statements include Belden Inc. and all of its subsidiaries (the Company, us, we, or our). We eliminate all significant affiliate accounts and transactions in consolidation. The accompanying Condensed Consolidated Financial Statements presented as of any date other than December 31, 2023: • Are prepared from the books and records without audit, and • Are prepared in accordance with the instructions for Form 10-Q and do not include all of the information required by accounting principles generally accepted in the United States for complete statements, but • Include all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the financial statements. These Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Supplementary Data contained in our 2023 Annual Report on Form 10-K.
Business Description	Business Description We are a leading global supplier of network infrastructure and digitization solutions built around two global businesses - Smart Infrastructure Solutions and Automation Solutions. As Belden continues to advance forward with solutions focused on data infrastructure, we renamed our two reportable segments during the three months ended September 29, 2024
Reporting Periods	Reporting Periods Our fiscal year and fiscal fourth quarter both end on December 31. Our fiscal first quarter ends on the Sunday falling closest to 91 days after December 31, which was March 31, 2024, the 91st day of our fiscal year 2024. Our fiscal second and third quarters each have 91 days. The nine months ended September 29, 2024 and October 1, 2023 included 273 and
Fair Value Measurement	Fair Value Measurement Accounting guidance for fair value measurements specifies a hierarchy of valuation techniques based upon whether the inputs to those valuation techniques reflect assumptions other market participants would use based upon market data obtained from independent sources or reflect our own assumptions of market participant valuation. The hierarchy is broken down into three levels based on the reliability of the inputs as follows: • Level 1 – Quoted prices in active markets that are unadjusted and accessible at the measurement date for identical, unrestricted assets or liabilities; • Level 2 – Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets, or financial instruments for which significant inputs are observable, either directly or indirectly; and •
Cash and Cash Equivalents	Cash and Cash Equivalents We classify cash on hand and deposits in banks, including commercial paper, money market accounts, and other investments with an original maturity of three months or less, that we hold from time to time, as cash and cash equivalents. We periodically have cash equivalents consisting of short-term money market funds and other investments. As of September 29, 2024, we did not have any such cash equivalents on hand.
Contingent Liabilities	Contingent Liabilities
Revenue Recognition	Revenue Recognition We recognize revenue consistent with the principles as outlined in the following five step model: (1) identify the contract with the customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) each performance obligation is satisfied. See Note 2.
Subsequent Events	Subsequent Events
Noncontrolling Interest	Noncontrolling Interest A Belden subsidiary includes a noncontrolling interest as of and for the periods ended September 29, 2024 and October 1, 2023 . The results attributable to the noncontrolling interest holders are not material to our condensed consolidated financial statements , and are
Current Year Adoption of Accounting Pronouncements and Pending Adoption of Recent Accounting Pronouncements	Current Year Adoption of Accounting Pronouncements None of the accounting pronouncements that became effective during 2024 had a material impact to our condensed consolidated financial statements or disclosures. Pending Adoption of Recent Accounting Pronouncements The Financial Accounting Standards Board (FASB) amended the guidance in Accounting Standards Codification (ASC) 280, Segment Reporting , to require public companies disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. The guidance is effective for public entities for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The guidance is applied retrospectively to all periods presented in the financial statements, unless it is impracticable. We did not early adopt this pronouncement, and we expect the amended guidance to have a minimal impact on our disclosures. In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740) Improvements to Income Tax Disclosures (ASU 2023-09) enhancing the transparency and decision usefulness of income tax disclosures. ASU 2023-09 addresses investor requests for more transparency about income tax information through improvements to income tax disclosures primarily related to the rate reconciliation and income taxes paid information. ASU 2023-09 is effective for annual periods beginning after December 15, 2024, with early adoption permitted. The amendments in ASU 2023-09 are applied on a prospective basis, though retrospective application is permitted. We did not early adopt this pronouncement and are in the process of evaluating its impact on our consolidated financial statements and related disclosures.

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 29, 2024
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following tables present our revenues disaggregated by major product category. Broadband Automation Solutions Smart Buildings Solutions Total Three Months Ended September 29, 2024 (In thousands) Smart Infrastructure Solutions $ 174,467 $ — $ 145,180 $ 319,647 Automation Solutions — 335,279 — 335,279 Total $ 174,467 $ 335,279 $ 145,180 $ 654,926 Three Months Ended October 1, 2023 Smart Infrastructure Solutions $ 146,048 $ — $ 137,857 $ 283,905 Automation Solutions — 342,902 — 342,902 Total $ 146,048 $ 342,902 $ 137,857 $ 626,807 Nine Months Ended September 29, 2024 Smart Infrastructure Solutions $ 422,588 $ — $ 401,621 $ 824,209 Automation Solutions — 970,728 — 970,728 Total $ 422,588 $ 970,728 $ 401,621 $ 1,794,937 Nine Months Ended October 1, 2023 Smart Infrastructure Solutions $ 436,935 $ — $ 434,842 $ 871,777 Automation Solutions — 1,089,064 — 1,089,064 Total $ 436,935 $ 1,089,064 $ 434,842 $ 1,960,841 The following tables present our revenues disaggregated by geography, based on the location of the customer purchasing the product. Americas EMEA APAC Total Revenues Three Months Ended September 29, 2024 (In thousands) Smart Infrastructure Solutions $ 243,759 $ 45,480 $ 30,408 $ 319,647 Automation Solutions 196,326 87,733 51,220 335,279 Total $ 440,085 $ 133,213 $ 81,628 $ 654,926 Three Months Ended October 1, 2023 Smart Infrastructure Solutions $ 199,002 $ 51,476 $ 33,427 $ 283,905 Automation Solutions 195,154 92,189 55,559 342,902 Total $ 394,156 $ 143,665 $ 88,986 $ 626,807 Nine Months Ended September 29, 2024 Smart Infrastructure Solutions $ 610,992 $ 133,547 $ 79,670 $ 824,209 Automation Solutions 578,101 248,606 144,021 970,728 Total $ 1,189,093 $ 382,153 $ 223,691 $ 1,794,937 Nine Months Ended October 1, 2023 Smart Infrastructure Solutions $ 659,360 $ 125,595 $ 86,822 $ 871,777 Automation Solutions 624,219 303,165 161,680 1,089,064 Total $ 1,283,579 $ 428,760 $ 248,502 $ 1,960,841
Schedule of Contract with Customer, Asset and Liability	The following table presents estimated and accrued variable consideration: September 29, 2024 December 31, 2023 (in thousands) Accrued rebates included in accrued liabilities $ 41,719 $ 49,255 Accrued returns included in accrued liabilities 15,299 15,570 Price adjustments recognized against gross accounts receivable 29,461 26,005 September 29, 2024 and October 1, 2023, respectively: 2024 2023 (In thousands) Beginning balance at January 1 $ 31,062 $ 33,243 New deferrals 6,280 4,359 Revenue recognized (7,392) (8,307) Balance at the end of Q1 $ 29,950 $ 29,295 New deferrals 11,058 6,900 Revenue recognized (11,395) (6,528) Balance at the end of Q2 $ 29,613 $ 29,667 New deferrals 14,714 9,146 Acquisitions 46 104 Revenue recognized (15,240) (11,224) Balance at the end of Q3 $ 29,133 $ 27,693
Schedule of Sales Commissions	The following table presents sales commissions that are recorded within selling, general and administrative expenses: Three Months Ended Nine Months ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Sales commissions $ 6,865 $ 4,729 $ 18,036 $ 16,819

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 29, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table summarizes the estimated, preliminary fair values of the assets acquired and liabilities assumed for Precision as of the acquisition date (in thousands): Receivables $ 18,562 Inventory 9,215 Other current assets 2,352 Property, plant and equipment 5,330 Intangible assets 162,000 Goodwill 144,690 Operating lease right-of-use assets 3,272 Total assets acquired $ 345,421 Accounts payable $ 11,452 Accrued liabilities 3,922 Deferred income taxes 37,507 Long-term operating lease liabilities 2,950 Total liabilities assumed $ 55,831 Net assets $ 289,590
Schedule of Acquired Intangible Assets	The intangible assets related to the acquisition consisted of the following: Fair Value Amortization Period (In thousands) (In years) Intangible assets subject to amortization: Developed technologies $ 24,700 5.0 Customer relationships 122,800 20.0 Trademarks 3,100 2.5 Non-compete agreements 11,400 5.0 Total intangible assets subject to amortization $ 162,000 Intangible assets not subject to amortization: Goodwill $ 144,690 n/a Total intangible assets not subject to amortization $ 144,690 Total intangible assets $ 306,690 Weighted average amortization period 16.3
Schedule of Pro Forma Information	The following table illustrates the unaudited pro forma effect on operating results as if the Precision acquisition had been completed as of January 1, 2023. Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands, except per share data) (Unaudited) Revenues $ 654,926 $ 667,789 $ 1,865,778 $ 2,057,521 Net income attributable to Belden stockholders 57,021 74,122 140,744 200,609 Diluted income per share attributable to Belden stockholders $ 1.38 $ 1.74 $ 3.40 $ 4.65

Reportable Segments (Tables)

Reportable Segments (Tables)	9 Months Ended
	Sep. 29, 2024
Segment Reporting [Abstract]
Schedule of Operating Segment Information	Smart Infrastructure Solutions Automation Solutions Total Segments (In thousands) As of and for the three months ended September 29, 2024 Segment Revenues $ 319,647 $ 335,279 $ 654,926 Segment EBITDA 40,447 71,819 112,266 Depreciation expense 6,758 7,897 14,655 Amortization of intangibles 8,738 5,000 13,738 Amortization of software development intangible assets — 2,678 2,678 Severance, restructuring, and acquisition integration costs 4,619 644 5,263 Adjustments related to acquisitions and divestitures 263 298 561 Segment assets 686,960 772,740 1,459,700 As of and for the three months ended October 1, 2023 Segment Revenues $ 283,905 $ 342,902 $ 626,807 Segment EBITDA 37,693 77,244 114,937 Depreciation expense 6,632 6,810 13,442 Amortization of intangibles 4,468 5,058 9,526 Amortization of software development intangible assets — 1,963 1,963 Severance, restructuring, and acquisition integration costs 3,453 2,622 6,075 Adjustments related to acquisitions and divestitures 197 298 495 Segment assets 625,356 698,287 1,323,643 As of and for the nine months ended September 29, 2024 Segment revenues $ 824,209 $ 970,728 $ 1,794,937 Segment EBITDA 97,691 198,301 295,992 Depreciation expense 19,277 22,420 41,697 Amortization of intangibles 19,479 15,008 34,487 Amortization of software development intangible assets — 7,855 7,855 Severance, restructuring, and acquisition integration costs 8,518 4,950 13,468 Adjustments related to acquisitions and divestitures 263 894 1,157 Segment assets 686,960 772,740 1,459,700 As of and for the nine months ended October 1, 2023 Segment Revenues $ 871,777 $ 1,089,064 $ 1,960,841 Segment EBITDA 118,854 229,662 348,516 Depreciation expense 18,779 19,699 38,478 Amortization of intangibles 15,171 15,091 30,262 Amortization of software development intangible assets — 5,235 5,235 Severance, restructuring, and acquisition integration costs 5,147 6,699 11,846 Adjustments related to acquisitions and divestitures 522 520 1,042 Segment assets 625,356 698,287 1,323,643
Schedule of Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes	The following table is a reconciliation of the total of the reportable segments’ Revenues and EBITDA to consolidated revenues and consolidated income before taxes, respectively. Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Total Segment and Consolidated Revenues $ 654,926 $ 626,807 $ 1,794,937 $ 1,960,841 Total Segment EBITDA $ 112,266 $ 114,937 $ 295,992 $ 348,516 Depreciation expense (14,655) (13,442) (41,697) (38,478) Amortization of intangibles (13,738) (9,526) (34,487) (30,262) Severance, restructuring, and acquisition integration costs (1) (5,263) (6,075) (13,468) (11,846) Amortization of software development intangible assets (2,678) (1,963) (7,855) (5,235) Adjustments related to acquisitions and divestitures (2) (561) (495) (1,157) (1,042) Eliminations (22) (63) (47) (146) Gain on sale of asset — 12,056 — 12,056 Consolidated operating income 75,349 95,429 197,281 273,563 Interest expense, net (10,855) (8,580) (27,454) (25,593) Total non-operating pension benefit 286 328 747 1,462 Consolidated income before taxes $ 64,780 $ 87,177 $ 170,574 $ 249,432 (1) Includes costs associated with acquisitions and manufacturing footprint actions.

Income per Share (Tables)

Income per Share (Tables)	9 Months Ended
	Sep. 29, 2024
Earnings Per Share [Abstract]
Schedule of Basis for Income Per Share Computations	The following table presents the basis for the income per share computations: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Numerator: Net income $ 53,689 $ 72,327 $ 140,032 $ 204,047 Less: Net loss attributable to noncontrolling interest (3) (20) (17) (245) Net income attributable to Belden stockholders $ 53,692 $ 72,347 $ 140,049 $ 204,292 Denominator: Weighted average shares outstanding, basic 40,798 42,053 40,825 42,460 Effect of dilutive common stock equivalents 619 572 546 669 Weighted average shares outstanding, diluted 41,417 42,625 41,371 43,129

Credit Losses (Tables)

Credit Losses (Tables)	9 Months Ended
	Sep. 29, 2024
Credit Loss [Abstract]
Schedule of Accounts Receivable, Allowance for Credit Loss	The following table presents the activity in the trade receivables allowance for doubtful accounts for the three and nine months ended September 29, 2024 and October 1, 2023, respectively: 2024 2023 (In thousands) Beginning balance at January 1 $ 23,114 $ 7,954 Current period provision 459 4,004 Recoveries collected (6) — Write-offs (96) (3) Fx impact (51) (25) Q1 ending balance $ 23,420 $ 11,930 Current period provision 638 4,194 Acquisitions 50 19 Recoveries collected — (8) Fx impact (44) 11 Write-offs (5) — Q2 ending balance $ 24,059 $ 16,146 Current period provision 79 4,933 Fx impact 140 (72) Write-offs (48) (31) Recoveries collected (1) (824) Q3 ending balance $ 24,229 $ 20,152

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 29, 2024
Inventory Disclosure [Abstract]
Schedule of Major Classes of Inventories	The following table presents the major classes of inventories as of September 29, 2024 and December 31, 2023 , respectively: September 29, 2024 December 31, 2023 (In thousands) Raw materials $ 202,242 $ 185,233 Work-in-process 44,515 41,197 Finished goods 193,543 208,425 Gross inventories 440,300 434,855 Excess and obsolete reserves (71,865) (67,868) Net inventories $ 368,435 $ 366,987

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 29, 2024
Leases [Abstract]
Schedule of Components of Lease Expense	The components of lease expense were as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Operating lease cost $ 6,893 $ 5,568 $ 20,686 $ 16,500 Finance lease cost Amortization of right-of-use asset $ 188 $ 187 $ 572 $ 578 Interest on lease liabilities 167 75 385 232 Total finance lease cost $ 355 $ 262 $ 957 $ 810
Schedule of Supplemental Cash Flow Information Related To Leases	upplemental cash flow information related to leases was as follows: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,423 $ 4,674 $ 15,926 $ 13,964
Schedule of Supplemental Balance Sheet Information Related To Leases	Supplemental balance sheet information related to leases was as follows: September 29, 2024 December 31, 2023 (In thousands) Operating leases: Total operating lease right-of-use assets $ 132,844 $ 89,686 Accrued liabilities $ 20,984 $ 18,226 Long-term operating lease liabilities 113,507 74,941 Total operating lease liabilities $ 134,491 $ 93,167 Finance leases: Other long-lived assets, at cost $ 8,294 $ 6,560 Accumulated depreciation (1,928) (1,347) Other long-lived assets, net $ 6,366 $ 5,213 Accrued liabilities $ 1,057 $ 719 Other long-term liabilities 6,692 6,084 Total finance lease liabilities $ 7,749 $ 6,803
Schedule of Supplemental Other Information Related To Leases	September 29, 2024 December 31, 2023 Weighted Average Remaining Lease Term Operating leases 10 years 6 years Finance leases 7 years 9 years Weighted Average Discount Rate Operating leases 5.9 % 5.0 % Finance leases 4.6 % 4.3 %

Long-Term Debt and Other Borr_2

Long-Term Debt and Other Borrowing Arrangements (Tables)	9 Months Ended
	Sep. 29, 2024
Debt Disclosure [Abstract]
Schedule of Carrying Values of Long-Term Debt and Other Borrowing Arrangements	The carrying values of our long-term debt were as follows: September 29, 2024 December 31, 2023 (In thousands) Revolving credit agreement due 2026 $ — $ — Senior subordinated notes: 3.375% Senior subordinated notes due 2027 502,380 497,025 3.875% Senior subordinated notes due 2028 390,740 386,575 3.375% Senior subordinated notes due 2031 334,920 331,350 Total senior subordinated notes 1,228,040 1,214,950 Less unamortized debt issuance costs (9,075) (10,739) Long-term debt $ 1,218,965 $ 1,204,211

Pension and Other Postretirem_2

Pension and Other Postretirement Obligations (Tables)	9 Months Ended
	Sep. 29, 2024
Retirement Benefits [Abstract]
Schedule of Components of Net Periodic Benefit Costs	The following table provides the components of net periodic benefit costs for our pension and other postretirement benefit plans: Pension Obligations Other Postretirement Obligations September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Three Months Ended Service cost $ 797 $ 522 $ 10 $ 3 Interest cost 3,723 3,838 235 253 Expected return on plan assets (4,147) (4,038) — — Amortization of prior service cost 46 45 — — Actuarial gains (27) (234) (116) (192) Net periodic benefit cost $ 392 $ 133 $ 129 $ 64 Nine Months Ended Service cost $ 2,284 $ 2,056 $ 30 $ 6 Interest cost 11,059 11,392 708 756 Expected return on plan assets (12,221) (12,476) — — Amortization of prior service cost 135 132 — — Actuarial gains (79) (692) (349) (574) Net periodic benefit cost $ 1,178 $ 412 $ 389 $ 188

Comprehensive Income and Accu_2

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 29, 2024
Equity [Abstract]
Schedule of Total Comprehensive Income (Loss)	The following table summarizes total comprehensive income: Three Months Ended Nine Months Ended September 29, 2024 October 1, 2023 September 29, 2024 October 1, 2023 (In thousands) Net income $ 53,689 $ 72,327 $ 140,032 $ 204,047 Foreign currency translation adjustments, net of tax (29,859) 21,852 (13,653) 257 Adjustments to pension and postretirement liability, net of tax (73) (284) (221) (848) Total comprehensive income 23,757 93,895 126,158 203,456 Less: Comprehensive loss attributable to noncontrolling interests (3) (20) (17) (241) Comprehensive income attributable to Belden $ 23,760 $ 93,915 $ 126,175 $ 203,697
Schedule of Components of Other Comprehensive Income (Loss), Net of Tax	The accumulated balances related to each component of other comprehensive loss, net of tax, are as follows: Foreign Pension and Accumulated Other (In thousands) Balance at December 31, 2023 $ (26,514) $ (14,765) $ (41,279) Other comprehensive loss attributable to Belden before reclassifications (13,653) — (13,653) Amounts reclassified from accumulated other comprehensive loss — (221) (221) Net current period other comprehensive loss attributable to Belden (13,653) (221) (13,874) Balance at September 29, 2024 $ (40,167) $ (14,986) $ (55,153)
Schedule of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss)	The following table summarizes the effects of reclassifications from accumulated other comprehensive loss for the nine months ended September 29, 2024: Amounts Affected Line Item in the Consolidated Statements of Operations and Comprehensive Income (In thousands) Amortization of pension and other postretirement benefit plan items: Actuarial gains $ (428) (1) Prior service cost 135 (1) Total before tax (293) Tax expense 72 Total net of tax $ (221)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details) $ in Millions	9 Months Ended
	Sep. 29, 2024 USD ($) segment
Significant Accounting Policies [Line Items]
Number of reportable segments | segment	2
Standby Letters of Credit
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	$ 8.3
Surety Bonds
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	6
Bank Guaranties
Significant Accounting Policies [Line Items]
Loss contingency, range of possible loss, portion not accrued	$ 5.3

Revenues - Major Product Catego

Revenues - Major Product Category (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	319,647	283,905	824,209	871,777
Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	335,279	342,902	970,728	1,089,064
Broadband Solutions
Disaggregation of Revenue [Line Items]
Revenues	174,467	146,048	422,588	436,935
Broadband Solutions | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	174,467	146,048	422,588	436,935
Broadband Solutions | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	335,279	342,902	970,728	1,089,064
Automation Solutions | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Automation Solutions | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	335,279	342,902	970,728	1,089,064
Smart Buildings Solutions
Disaggregation of Revenue [Line Items]
Revenues	145,180	137,857	401,621	434,842
Smart Buildings Solutions | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	145,180	137,857	401,621	434,842
Smart Buildings Solutions | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

Revenues - Location of Customer

Revenues - Location of Customer (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	319,647	283,905	824,209	871,777
Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	335,279	342,902	970,728	1,089,064
Americas
Disaggregation of Revenue [Line Items]
Revenues	440,085	394,156	1,189,093	1,283,579
Americas | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	243,759	199,002	610,992	659,360
Americas | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	196,326	195,154	578,101	624,219
EMEA
Disaggregation of Revenue [Line Items]
Revenues	133,213	143,665	382,153	428,760
EMEA | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	45,480	51,476	133,547	125,595
EMEA | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	87,733	92,189	248,606	303,165
APAC
Disaggregation of Revenue [Line Items]
Revenues	81,628	88,986	223,691	248,502
APAC | Smart Infrastructure Solutions
Disaggregation of Revenue [Line Items]
Revenues	30,408	33,427	79,670	86,822
APAC | Automation Solutions
Disaggregation of Revenue [Line Items]
Revenues	$ 51,220	$ 55,559	$ 144,021	$ 161,680

Revenues - Estimated and Accrue

Revenues - Estimated and Accrued Variable Consideration (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 29, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Accrued rebates included in accrued liabilities	$ 41,719	$ 49,255
Accrued returns included in accrued liabilities	15,299	15,570
Price adjustments recognized against gross accounts receivable	$ 29,461	$ 26,005

Revenues - Additional Informati

Revenues - Additional Information (Details) - USD ($) $ in Thousands	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Contract with customer, deferred revenues	$ 29,133	$ 29,613	$ 29,950	$ 31,062	$ 27,693	$ 29,667	$ 29,295	$ 33,243
Contract with customer, deferred revenues, current	21,900
Contract with customer, deferred revenues, noncurrent	7,200
Service-Type Warranties
Disaggregation of Revenue [Line Items]
Contract with customer, deferred revenues	9,800
Contract with customer, deferred revenues, current	5,100
Contract with customer, deferred revenues, noncurrent	$ 4,700

Revenues - Deferred Revenue (De

Revenues - Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023
Change in Contract with Customer, Liability [Roll Forward]
Beginning balance	$ 29,613	$ 29,950	$ 31,062	$ 29,667	$ 29,295	$ 33,243
New deferrals	14,714	11,058	6,280	9,146	6,900	4,359
Acquisitions	46			104
Revenue recognized	(15,240)	(11,395)	(7,392)	(11,224)	(6,528)	(8,307)
Ending balance	$ 29,133	$ 29,613	$ 29,950	$ 27,693	$ 29,667	$ 29,295

Revenues - Sales Commissions (D

Revenues - Sales Commissions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Revenue from Contract with Customer [Abstract]
Sales commissions	$ 6,865	$ 4,729	$ 18,036	$ 16,819

Acquisitions - Additional Infor

Acquisitions - Additional Information (Details) € in Millions				3 Months Ended		9 Months Ended
	Sep. 16, 2024 USD ($)	Sep. 16, 2024 EUR (€)	Jun. 30, 2024 USD ($)	Sep. 29, 2024 USD ($)	Oct. 01, 2023 USD ($)	Sep. 29, 2024 USD ($)	Oct. 01, 2023 USD ($)
Business Acquisition [Line Items]
Purchase price, net of cash acquired						$ 295,591,000	$ 106,712,000
Amortization of intangibles				$ 13,738,000	$ 9,526,000	34,487,000	$ 30,262,000
Voleatech GmbH
Business Acquisition [Line Items]
Purchase price, net of cash acquired	$ 5,600,000	€ 5
Potential earn-out | €		€ 3
Potential earn-out, term (in years)	3 years	3 years
Precision Optical Technologies
Business Acquisition [Line Items]
Purchase price, net of cash acquired			$ 289,600,000
Receivables			18,600,000
Tax basis in acquired goodwill			$ 0
Post acquisition revenue of acquiree				34,400,000
Post acquisition income (loss) before taxes of acquiree						1,200,000
Severance, restructuring, and acquisition integration costs				4,100,000		4,100,000
Amortization of intangibles				3,700,000		3,700,000
Inventory adjustment				$ 300,000		$ 300,000

Acquisitions - Schedule of Reco

Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 29, 2024	Jun. 30, 2024	Dec. 31, 2023
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Goodwill	$ 1,056,549		$ 907,331
Precision Optical Technologies
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract]
Receivables		$ 18,562
Inventory		9,215
Other current assets		2,352
Property, plant and equipment		5,330
Intangible assets		162,000
Goodwill		144,690
Operating lease right-of-use assets		3,272
Total assets acquired		345,421
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Accounts payable		11,452
Accrued liabilities		3,922
Deferred income taxes		37,507
Long-term operating lease liabilities		2,950
Total liabilities assumed		55,831
Net assets		$ 289,590

Acquisitions - Schedule of Acqu

Acquisitions - Schedule of Acquired Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 29, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill		$ 1,056,549	$ 907,331
Precision Optical Technologies
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 162,000
Goodwill	144,690
Total intangible assets	$ 306,690
Weighted average amortization period	16 years 3 months 18 days
Precision Optical Technologies | Developed technologies
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 24,700
Amortization Period	5 years
Precision Optical Technologies | Customer relationships
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 122,800
Amortization Period	20 years
Precision Optical Technologies | Trademarks
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 3,100
Amortization Period	2 years 6 months
Precision Optical Technologies | Non-compete agreements
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 11,400
Amortization Period	5 years

Acquisitions - Schedule of Pro

Acquisitions - Schedule of Pro Forma Information (Details) - Precision Acquisition - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Business Acquisition [Line Items]
Revenues	$ 654,926	$ 667,789	$ 1,865,778	$ 2,057,521
Net income attributable to Belden stockholders	$ 57,021	$ 74,122	$ 140,744	$ 200,609
Diluted income per share attributable to Belden stockholders (in usd per share)	$ 1.38	$ 1.74	$ 3.40	$ 4.65

Reportable Segments - Additiona

Reportable Segments - Additional Information (Details)	9 Months Ended
	Sep. 29, 2024 segment
Segment Reporting [Abstract]
Number of reportable segments	2

Reportable Segments - Operating

Reportable Segments - Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Segment Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Depreciation expense	14,700	13,400	41,700	38,500
Amortization of intangibles	13,738	9,526	34,487	30,262
Segment assets	3,340,451		3,340,451		$ 3,240,191
Smart Infrastructure Solutions
Segment Reporting Information [Line Items]
Segment Revenues	319,647	283,905	824,209	871,777
Automation Solutions
Segment Reporting Information [Line Items]
Segment Revenues	335,279	342,902	970,728	1,089,064
Reportable Segment
Segment Reporting Information [Line Items]
Segment Revenues	654,926	626,807	1,794,937	1,960,841
Segment EBITDA	112,266	114,937	295,992	348,516
Depreciation expense	14,655	13,442	41,697	38,478
Amortization of intangibles	13,738	9,526	34,487	30,262
Amortization of software development intangible assets	2,678	1,963	7,855	5,235
Severance, restructuring, and acquisition integration costs	5,263	6,075	13,468	11,846
Adjustments related to acquisitions and divestitures	561	495	1,157	1,042
Segment assets	1,459,700	1,323,643	1,459,700	1,323,643
Reportable Segment | Software Development
Segment Reporting Information [Line Items]
Amortization of software development intangible assets	2,678	1,963	7,855	5,235
Reportable Segment | Smart Infrastructure Solutions
Segment Reporting Information [Line Items]
Segment Revenues	319,647	283,905	824,209	871,777
Segment EBITDA	40,447	37,693	97,691	118,854
Depreciation expense	6,758	6,632	19,277	18,779
Amortization of intangibles	8,738	4,468	19,479	15,171
Severance, restructuring, and acquisition integration costs	4,619	3,453	8,518	5,147
Adjustments related to acquisitions and divestitures	263	197	263	522
Segment assets	686,960	625,356	686,960	625,356
Reportable Segment | Smart Infrastructure Solutions | Software Development
Segment Reporting Information [Line Items]
Amortization of software development intangible assets	0	0	0	0
Reportable Segment | Automation Solutions
Segment Reporting Information [Line Items]
Segment Revenues	335,279	342,902	970,728	1,089,064
Segment EBITDA	71,819	77,244	198,301	229,662
Depreciation expense	7,897	6,810	22,420	19,699
Amortization of intangibles	5,000	5,058	15,008	15,091
Severance, restructuring, and acquisition integration costs	644	2,622	4,950	6,699
Adjustments related to acquisitions and divestitures	298	298	894	520
Segment assets	772,740	698,287	772,740	698,287
Reportable Segment | Automation Solutions | Software Development
Segment Reporting Information [Line Items]
Amortization of software development intangible assets	$ 2,678	$ 1,963	$ 7,855	$ 5,235

Reportable Segments - Reconcili

Reportable Segments - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income Before Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 654,926	$ 626,807	$ 1,794,937	$ 1,960,841
Depreciation expense	(14,700)	(13,400)	(41,700)	(38,500)
Amortization of intangibles	(13,738)	(9,526)	(34,487)	(30,262)
Operating income	75,349	95,429	197,281	273,563
Gain on sale of assets	0	12,056	0	12,056
Interest expense, net	(10,855)	(8,580)	(27,454)	(25,593)
Non-operating pension benefit	286	328	747	1,462
Consolidated income before taxes	64,780	87,177	170,574	249,432
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	654,926	626,807	1,794,937	1,960,841
Segment EBITDA	112,266	114,937	295,992	348,516
Depreciation expense	(14,655)	(13,442)	(41,697)	(38,478)
Amortization of intangibles	(13,738)	(9,526)	(34,487)	(30,262)
Severance, restructuring, and acquisition integration costs	(5,263)	(6,075)	(13,468)	(11,846)
Amortization of software development intangible assets	(2,678)	(1,963)	(7,855)	(5,235)
Adjustments related to acquisitions and divestitures	561	495	1,157	1,042
Operating income	75,349	95,429	197,281	273,563
Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ (22)	$ (63)	$ (47)	$ (146)

Income per Share - Basis for In

Income per Share - Basis for Income Per Share Computations (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023	Sep. 29, 2024	Oct. 01, 2023
Numerator:
Net income	$ 53,689	$ 49,034	$ 37,309	$ 72,327	$ 68,775	$ 62,945	$ 140,032	$ 204,047
Less: Net loss attributable to noncontrolling interest	(3)			(20)			(17)	(245)
Net income attributable to Belden stockholders	$ 53,692			$ 72,347			$ 140,049	$ 204,292
Denominator:
Weighted average shares outstanding, basic (in shares)	40,798			42,053			40,825	42,460
Effect of dilutive common stock equivalents (in shares)	619			572			546	669
Weighted average shares outstanding, diluted (in shares)	41,417			42,625			41,371	43,129

Income per Share - Additional I

Income per Share - Additional Information (Details) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Earnings Per Share [Abstract]
Outstanding equity awards not included in diluted weighted average shares outstanding (in shares)	0.1	0.2	0.1	0.2
Outstanding equity awards not included in diluted weighted average shares outstanding due to performance conditions not being met (in shares)	0.2	0.2	0.3	0.3

Credit Losses (Details)

Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 24,059	$ 23,420	$ 23,114	$ 16,146	$ 11,930	$ 7,954
Current period provision	79	638	459	4,933	4,194	4,004
Acquisitions		50			19
Recoveries collected, net		0
Recoveries collected	(1)		(6)	(824)	(8)	0
Write-offs	(48)	(5)	(96)	(31)	0	(3)
Fx impact	140	(44)	(51)	(72)	11	(25)
Ending balance	$ 24,229	$ 24,059	$ 23,420	$ 20,152	$ 16,146	$ 11,930

Inventories - Major Classes of

Inventories - Major Classes of Inventories (Details) - USD ($) $ in Thousands	Sep. 29, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 202,242	$ 185,233
Work-in-process	44,515	41,197
Finished goods	193,543	208,425
Gross inventories	440,300	434,855
Excess and obsolete reserves	(71,865)	(67,868)
Net inventories	$ 368,435	$ 366,987

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Variable lease, payment	$ 900	$ 800	$ 2,700	$ 2,400
Operating lease right-of-use assets	132,844		132,844		$ 89,686
Operating lease liability	134,491		134,491		93,167
Fixed payments remaining	21,000		21,000
Liability for expected future payments	9,600		9,600		$ 11,300
2024 New Leases
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	33,800		33,800
Operating lease liability	$ 33,300		$ 33,300
Minimum
Lessee, Lease, Description [Line Items]
Lessee, finance lease, term	1 year		1 year
Lessee, operating lease, term	1 year		1 year
Maximum
Lessee, Lease, Description [Line Items]
Lessee, finance lease, term	20 years		20 years
Lessee, operating lease, term	20 years		20 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Leases [Abstract]
Operating lease cost	$ 6,893	$ 5,568	$ 20,686	$ 16,500
Amortization of right-of-use asset	188	187	572	578
Interest on lease liabilities	167	75	385	232
Total finance lease cost	$ 355	$ 262	$ 957	$ 810

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information Related To Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Leases [Abstract]
Operating cash flows from operating leases	$ 4,423	$ 4,674	$ 15,926	$ 13,964

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information Related To Leases (Details) - USD ($) $ in Thousands	Sep. 29, 2024	Dec. 31, 2023
Leases [Abstract]
Total operating lease right-of-use assets	$ 132,844	$ 89,686
Accrued liabilities	$ 20,984	$ 18,226
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued liabilities	Accrued liabilities
Long-term operating lease liabilities	$ 113,507	$ 74,941
Total operating lease liabilities	134,491	93,167
Other long-lived assets, at cost	$ 8,294	$ 6,560
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other long-lived assets	Other long-lived assets
Accumulated depreciation	$ (1,928)	$ (1,347)
Other long-lived assets, net	6,366	5,213
Accrued liabilities	$ 1,057	$ 719
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Other long-term liabilities	$ 6,692	$ 6,084
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term liabilities	Other long-term liabilities
Total finance lease liabilities	$ 7,749	$ 6,803

Leases - Supplemental Other Inf

Leases - Supplemental Other Information Related To Leases (Details)	Sep. 29, 2024	Dec. 31, 2023
Weighted Average Remaining Lease Term
Operating leases	10 years	6 years
Finance leases	7 years	9 years
Weighted Average Discount Rate
Operating leases	5.90%	5%
Finance leases	4.60%	4.30%

Long-Lived Assets (Details)

Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 14.7	$ 13.4	$ 41.7	$ 38.5
Amortization expense	$ 16.4	11.5	$ 42.3	35.5
Sale leaseback transaction, net proceeds, investing activities		13.8		13.8
Sale and leaseback transaction, gain (loss), net		$ 12.1		$ 12.1

Long-Term Debt and Other Borr_3

Long-Term Debt and Other Borrowing Arrangements - Carrying Values of Long-Term Debt and Other Borrowing Arrangements (Details) - USD ($)	Sep. 29, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Long-term debt, gross	$ 1,228,040,000	$ 1,214,950,000
Less unamortized debt issuance costs	(9,075,000)	(10,739,000)
Long-term debt	1,218,965,000	1,204,211,000
Line of Credit | Revolving Credit Facility | Revolving credit agreement due 2026
Debt Instrument [Line Items]
Long-term debt, gross	0	0
Senior Subordinated Notes | 3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Long-term debt, gross	$ 502,380,000	497,025,000
Senior subordinated notes interest rate	3.375%
Senior Subordinated Notes | 3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Long-term debt, gross	$ 390,740,000	386,575,000
Senior subordinated notes interest rate	3.875%
Senior Subordinated Notes | 3.375% Senior subordinated notes due 2031
Debt Instrument [Line Items]
Long-term debt, gross	$ 334,920,000	$ 331,350,000
Senior subordinated notes interest rate	3.375%

Long-Term Debt and Other Borr_4

Long-Term Debt and Other Borrowing Arrangements - Additional Information (Details) € in Millions	9 Months Ended
	Sep. 29, 2024 USD ($)	Sep. 29, 2024 EUR (€)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Revolver borrowings outstanding	$ 1,228,040,000		$ 1,214,950,000
Senior subordinated notes	1,228,000,000
Senior Subordinated Notes
Debt Instrument [Line Items]
Fair value of senior subordinated notes	1,190,000,000
Revolving credit agreement due 2026 | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300,000,000
Commitment fee percentage	0.25%
Fixed charge coverage, minimum threshold (as a percent)	90%
Revolver borrowings outstanding	$ 0		0
Revolving credit agreement, available borrowing capacity	$ 291,400,000
Revolving credit agreement due 2026 | Minimum | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.25%
Revolving credit agreement due 2026 | Minimum | Line of Credit | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	0.25%
Revolving credit agreement due 2026 | Maximum | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	1.75%
Revolving credit agreement, remaining borrowing capacity	$ 20,000,000
Revolving credit agreement due 2026 | Maximum | Line of Credit | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate (as a percent)	0.75%
3.375% Senior subordinated notes due 2027
Debt Instrument [Line Items]
Senior subordinated notes	$ 502,400,000
3.375% Senior subordinated notes due 2027 | Senior Subordinated Notes
Debt Instrument [Line Items]
Revolver borrowings outstanding	$ 502,380,000		497,025,000
Debt instrument, amount outstanding | €		€ 450
Senior subordinated notes interest rate	3.375%	3.375%
3.875% Senior subordinated notes due 2028
Debt Instrument [Line Items]
Senior subordinated notes	$ 390,700,000
3.875% Senior subordinated notes due 2028 | Senior Subordinated Notes
Debt Instrument [Line Items]
Revolver borrowings outstanding	$ 390,740,000		386,575,000
Debt instrument, amount outstanding | €		€ 350
Senior subordinated notes interest rate	3.875%	3.875%
3.375% Senior subordinated notes due 2031 | Senior Subordinated Notes
Debt Instrument [Line Items]
Revolver borrowings outstanding	$ 334,920,000		$ 331,350,000
Debt instrument, amount outstanding | €		€ 300
Senior subordinated notes interest rate	3.375%	3.375%
Senior subordinated notes	$ 334,900,000

Net Investment Hedge (Details)

Net Investment Hedge (Details) $ in Thousands, € in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2024 USD ($)	Oct. 01, 2023 USD ($)	Sep. 29, 2024 USD ($)	Oct. 01, 2023 USD ($)	Sep. 29, 2024 EUR (€)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Cumulative gain (loss) translation adjustment	$ (29,859)	$ 21,852	$ (13,653)	$ 257
Senior Subordinated Notes
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Senior subordinated debt, hedged | €					€ 567.8
Cumulative gain (loss) translation adjustment			$ (6,700)	$ 8,800

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Income Tax Disclosure [Abstract]
Tax expense	$ 11,091	$ 14,850	$ 30,542	$ 45,385
Effective tax rate	17.10%	17%	17.90%	18.20%

Pension and Other Postretirem_3

Pension and Other Postretirement Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Pension Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 797	$ 522	$ 2,284	$ 2,056
Interest cost	3,723	3,838	11,059	11,392
Expected return on plan assets	(4,147)	(4,038)	(12,221)	(12,476)
Amortization of prior service cost	46	45	135	132
Actuarial gains	(27)	(234)	(79)	(692)
Net periodic benefit cost	392	133	1,178	412
Other Postretirement Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	10	3	30	6
Interest cost	235	253	708	756
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Actuarial gains	(116)	(192)	(349)	(574)
Net periodic benefit cost	$ 129	$ 64	$ 389	$ 188

Comprehensive Income and Accu_3

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Total Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 29, 2024	Jun. 30, 2024	Mar. 31, 2024	Oct. 01, 2023	Jul. 02, 2023	Apr. 02, 2023	Sep. 29, 2024	Oct. 01, 2023
Equity [Abstract]
Net income	$ 53,689	$ 49,034	$ 37,309	$ 72,327	$ 68,775	$ 62,945	$ 140,032	$ 204,047
Foreign currency translation adjustments, net of tax	(29,859)			21,852			(13,653)	257
Adjustments to pension and postretirement liability, net of tax	(73)			(284)			(221)	(848)
Total comprehensive income	23,757			93,895			126,158	203,456
Less: Comprehensive loss attributable to noncontrolling interests	(3)			(20)			(17)	(241)
Comprehensive income attributable to Belden	$ 23,760			$ 93,915			$ 126,175	$ 203,697

Comprehensive Income and Accu_4

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss), Net of Tax (Details) $ in Thousands	9 Months Ended
	Sep. 29, 2024 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,166,257
Other comprehensive loss attributable to Belden before reclassifications	(13,653)
Amounts reclassified from accumulated other comprehensive loss	(221)
Net current period other comprehensive loss attributable to Belden	(13,874)
Ending balance	1,235,211
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(41,279)
Ending balance	(55,153)
Foreign Currency Translation Component
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(26,514)
Other comprehensive loss attributable to Belden before reclassifications	(13,653)
Amounts reclassified from accumulated other comprehensive loss	0
Net current period other comprehensive loss attributable to Belden	(13,653)
Ending balance	(40,167)
Pension and Other  Postretirement Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(14,765)
Other comprehensive loss attributable to Belden before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	(221)
Net current period other comprehensive loss attributable to Belden	(221)
Ending balance	$ (14,986)

Comprehensive Income and Accu_5

Comprehensive Income and Accumulated Other Comprehensive Income (Loss) - Summary of Effects of Reclassifications from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	$ (64,780)	$ (87,177)	$ (170,574)	$ (249,432)
Tax expense	11,091	14,850	30,542	45,385
Total net of tax	$ (53,692)	$ (72,347)	(140,049)	$ (204,292)
Amounts  Reclassified from Accumulated Other Comprehensive Loss | Actuarial gains
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)			(428)
Amounts  Reclassified from Accumulated Other Comprehensive Loss | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other nonoperating expense (income)			135
Amounts  Reclassified from Accumulated Other Comprehensive Loss | Pension and Other  Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax			(293)
Tax expense			72
Total net of tax			$ (221)

Share Repurchase (Details)

Share Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)		0.2	0.7	0.9	1.7
Value of shares repurchased		$ 20.1	$ 63.8	$ 78	$ 150
Treasury stock acquired, average cost per share (in usd per share)		$ 110.84	$ 92.46	$ 90.98	$ 89.42
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Shares repurchased (in shares)	0.3
Value of shares repurchased	$ 37.6
Treasury stock acquired, average cost per share (in usd per share)	$ 116.90
2024 Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Increase in authorized amount		$ 300		$ 300
2024 Share Repurchase Program | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 357.3