10-Q

Table of Contents

United States

Securities and Exchange Commission

Washington, D.C. 20549

FORM 10-Q 

(Mark One)

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

For the quarterly period ended March 27, 2021

OR

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

For the transition period from ___ to ___

Commission file number 0-20388

LITTELFUSE, INC. 

(Exact name of registrant as specified in its charter)

Delaware		36-3795742
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)
8755 West Higgins Road
Suite 500
Chicago	Illinois	60631
(Address of principal executive offices)		(ZIP Code)

Registrant’s telephone number, including area code: 773-628-1000

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

Title of Each Class	Trading Symbol	Name of exchange on which registered
Common Stock, $0.01 par value	LFUS	NASDAQ	Global Select Market

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

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

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes [X] No [ ]

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Yes [ ] No [ ]

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

As of April 23, 2021, the registrant had outstanding 24,555,229 shares of Common Stock, net of Treasury Shares.

Table of Contents

TABLE OF CONTENTS

		Page
PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Condensed Consolidated Balance Sheets as of March 27, 2021 (unaudited) and December 26, 2020	3
	Condensed Consolidated Statements of Net Income for the three months ended March 27, 2021 (unaudited) and March 28, 2020 (unaudited)	4
	Condensed Consolidated Statements of Comprehensive Income for the three months ended March 27, 2021 (unaudited) and March 28, 2020 (unaudited)	5
	Condensed Consolidated Statements of Cash Flows for the three months ended March 27, 2021 (unaudited) and March 28, 2020 (unaudited)	6
	Condensed Consolidated Statements of Stockholders' Equity for the three months ended March 27, 2021 (unaudited) and March 28, 2020 (unaudited)	7
	Notes to Condensed Consolidated Financial Statements (unaudited)	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	32
Item 4.	Controls and Procedures	32
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	33
Item 1A.	Risk Factors	33
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	33
Item 3.	Defaults Upon Senior Securities	33
Item 4.	Mine Safety Disclosures	33
Item 5.	Other Information	34
Item 6.	Exhibits	34
Signatures		35

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LITTELFUSE, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

	(Unaudited)
(in thousands)	March 27, 2021		December 26, 2020
ASSETS
Current assets:
Cash and cash equivalents	$	572,771	$	687,525
Short-term investments	53		54
Trade receivables, less allowances of $42,624 and $45,237 at March 27, 2021 and December 26, 2020, respectively	276,687		232,760
Inventories	295,057		258,002
Prepaid income taxes and income taxes receivable	4,146		3,029
Prepaid expenses and other current assets	43,698		35,939
Total current assets	1,192,412		1,217,309
Net property, plant, and equipment	344,914		344,178
Intangible assets, net of amortization	317,294		291,887
Goodwill	845,586		816,812
Investments	37,285		30,547
Deferred income taxes	9,854		11,224
Right of use lease assets, net	19,560		17,615
Other assets	19,965		18,021
Total assets	$	2,786,870	$	2,747,593
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable	$	179,723	$	145,984
Accrued liabilities	98,354		110,478
Accrued income taxes	23,468		19,186
Current portion of long-term debt	25,000		—
Total current liabilities	326,545		275,648
Long-term debt, less current portion	623,865		687,034
Deferred income taxes	51,229		50,134
Accrued post-retirement benefits	42,894		45,802
Non-current operating lease liabilities	14,190		12,950
Other long-term liabilities	67,410		67,252
Shareholders’ equity:
Common stock, par value $0.01 per share: 34,000,000 shares authorized; shares issued, March 27, 2021–26,196,472; December 26, 2020–26,131,544	259		259
Additional paid-in capital	918,762		907,858
Treasury stock, at cost: 1,644,283 and 1,644,283 shares, respectively	(242,366)		(242,366)
Accumulated other comprehensive loss	(96,028)		(91,157)
Retained earnings	1,079,979		1,034,048
Littelfuse, Inc. shareholders’ equity	1,660,606		1,608,642
Non-controlling interest	131		131
Total equity	1,660,737		1,608,773
Total liabilities and equity	$	2,786,870	$	2,747,593

See accompanying Notes to Condensed Consolidated Financial Statements.

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LITTELFUSE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME

(Unaudited)

	Three Months Ended
(in thousands, except per share data)	March 27, 2021		March 28, 2020
Net sales	$	463,794	$	346,096
Cost of sales	303,328		221,740
Gross profit	160,466		124,356
Selling, general, and administrative expenses	58,288		51,200
Research and development expenses	14,739		14,463
Amortization of intangibles	10,521		9,981
Restructuring, impairment, and other charges	437		3,962
Total operating expenses	83,985		79,606
Operating income	76,481		44,750
Interest expense	4,673		5,418
Foreign exchange loss	6,837		2,584
Other (income) expense, net	(7,737)		1,249
Income before income taxes	72,708		35,499
Income taxes	14,995		10,855
Net income	$	57,713	$	24,644
Earnings per share:
Basic	$	2.35	$	1.01
Diluted	$	2.32	$	1.00
Weighted-average shares and equivalent shares outstanding:
Basic	24,532		24,393
Diluted	24,892		24,578

See accompanying Notes to Condensed Consolidated Financial Statements.

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LITTELFUSE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net income	$	57,713	$	24,644
Other comprehensive income (loss):
Pension and postemployment adjustment, net of tax	454		561
Foreign currency translation adjustments	(5,325)		(15,540)
Comprehensive income	$	52,842	$	9,665

See accompanying Notes to Condensed Consolidated Financial Statements.

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LITTELFUSE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
OPERATING ACTIVITIES
Net income	$	57,713	$	24,644
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	13,677		13,821
Amortization of intangibles	10,521		9,981
Deferred revenue	(157)		(145)
Non-cash inventory charges	3,489		—
Impairment charges	—		2,237
Stock-based compensation	3,395		2,965
(Gain) loss on investments and other assets	(7,675)		2,604
Deferred income taxes	378		616
Other	8,537		3,547
Changes in operating assets and liabilities:
Trade receivables	(32,973)		(9,457)
Inventories	(6,152)		6,667
Accounts payable	17,070		(3,964)
Accrued liabilities and income taxes	(15,427)		(7,012)
Prepaid expenses and other assets	(2,230)		(1,225)
Net cash provided by operating activities	50,166		45,279
INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(109,852)		—
Purchases of property, plant, and equipment	(14,721)		(16,586)
Net proceeds from sale of property, plant and equipment	2,553		50
Net cash used in investing activities	(122,020)		(16,536)
FINANCING ACTIVITIES
Proceeds of revolving credit facility	—		100,000
Payments of revolving credit facility	(30,000)		—
Payments of term loan	—		(2,500)
Net proceeds related to stock-based award activities	7,509		2,956
Purchases of common stock	—		(22,927)
Cash dividends paid	(11,782)		(11,725)
Net cash (used in) provided by financing activities	(34,273)		65,804
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4,101)		(5,111)
(Decrease) increase in cash, cash equivalents, and restricted cash	(110,228)		89,436
Cash, cash equivalents, and restricted cash at beginning of period	687,525		531,139
Cash, cash equivalents, and restricted cash at end of period	$	577,297	$	620,575
Supplementary Cash Flow Information
Reconciliation of cash and cash equivalents:
Cash and cash equivalents	$	572,771	$	620,575
Restricted cash included in prepaid expenses and other current assets	$	3,462	—
Restricted cash included in other assets	$	1,064	$	—
Cash paid during the period for interest	$	6,235	$	7,354
Capital expenditures, not yet paid	$	4,141	$	5,832

 See accompanying Notes to Condensed Consolidated Financial Statements.

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LITTELFUSE, INC.

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(Unaudited)

	Littelfuse, Inc. Shareholders’ Equity
(in thousands, except share and per share data)	Common Stock		Addl. Paid in Capital		Treasury Stock		Accum. Other Comp. (Loss)		Retained Earnings		Non-controlling Interest		Total
Balance at December 26, 2020	$	259	$	907,858	$	(242,366)	$	(91,157)	$	1,034,048	$	131	$	1,608,773
Net income	—		—		—		—		57,713		—		57,713
Other comprehensive loss, net of tax	—		—		—		(4,871)		—		—		(4,871)
Stock-based compensation	—		3,395		—		—		—		—		3,395
Stock options exercised	—		7,509		—		—		—		—		7,509
Cash dividends paid ($0.48 per share)	—		—		—		—		(11,782)		—		(11,782)
Balance at March 27, 2021	$	259	$	918,762	$	(242,366)	$	(96,028)	$	1,079,979	$	131	$	1,660,737

	Littelfuse, Inc. Shareholders’ Equity
(in thousands, except share and per share data)	Common Stock		Addl. Paid in Capital		Treasury Stock		Accum. Other Comp. (Loss)		Retained Earnings		Non-controlling Interest		Total
Balance at December 28, 2019	$	256	$	867,996	$	(216,447)	$	(106,823)	$	950,901	$	131	$	1,496,014
Net income	—		—		—		—		24,644		—		24,644
Other comprehensive loss, net of tax	—		—		—		(14,979)		—		—		(14,979)
Stock-based compensation	—		2,965		—		—		—		—		2,965
Withheld shares on restricted share units for withholding taxes	—		—		(443)		—		—		—		(443)
Stock options exercised	—		3,399		—		—		—		—		3,399
Repurchases of common stock	—		—		(22,927)		—		—		—		(22,927)
Cash dividends paid ($0.48 per share)	—		—		—		—		(11,725)		—		(11,725)
Balance at March 28, 2020	$	256	$	874,360	$	(239,817)	$	(121,802)	$	963,820	$	131	$	1,476,948

See accompanying Notes to Condensed Consolidated Financial Statements.

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Notes to Condensed Consolidated Financial Statements 

1. Summary of Significant Accounting Policies and Other Information

Nature of Operations 

Founded in 1927, Littelfuse is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 12,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation and electronics end markets – everywhere, every day.

Basis of Presentation 

The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net income and comprehensive income, statements of cash flows, and statement of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 26, 2020 which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results.

Revenue Recognition

Revenue Disaggregation

The following tables disaggregate the Company’s revenue by primary business units for the three months ended March 27, 2021 and March 28, 2020:

	Three Months Ended March 27, 2021
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	132,437	$	—	$	—	$	132,437
Electronics – Semiconductor	154,098		—		—		154,098
Passenger Car Products	—		67,901		—		67,901
Automotive Sensors	—		28,284		—		28,284
Commercial Vehicle Products	—		32,344		—		32,344
Industrial Products	—		—		48,730		48,730
Total	$	286,535	$	128,529	$	48,730	$	463,794

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	Three Months Ended March 28, 2020
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	84,598	$	—	$	—	$	84,598
Electronics – Semiconductor	129,591		—		—		129,591
Passenger Car Products	—		52,645		—		52,645
Automotive Sensors	—		24,174		—		24,174
Commercial Vehicle Products	—		27,951		—		27,951
Industrial Products	—		—		27,137		27,137
Total	$	214,189	$	104,770	$	27,137	$	346,096

See Note 15, Segment Information for net sales by segment and countries.

Revenue Recognition

The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowance, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors.

The Company elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year.

Revenue and Billing

The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue.

Ship and Debit Program

Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributor to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historic activity, electronic distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue.

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Return to Stock 

The Company has a return to stock policy whereby certain customers, with prior authorization from Littelfuse management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historic activity. Sales revenue and cost of sales are reduced to anticipate estimated returns.

Volume Rebates

The Company offers volume based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold.

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash at March 27, 2021 and December 26, 2020 reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows.

(in thousands)	March 27, 2021		December 26, 2020
Cash and cash equivalents	$	572,771	$	687,525
Restricted cash included in prepaid expenses and other current assets	3,462		—
Restricted cash included in other assets	1,064		$	—
Total cash, cash equivalents and restricted cash	$	577,297	$	687,525

Recently Adopted Accounting Standards

In December 2019, the Financial Accounting Standards Board (FASB) issued ASU No. 2019-12, "Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes" as part of its initiative to reduce complexity in the accounting standards. The guidance is effective for fiscal years beginning after December 15, 2020 with early adoption permitted. The adoption of ASU 2019-12 did not have a material impact on our Condensed Consolidated Financial Statements.

2. Acquisitions

The Company accounts for acquisitions using the acquisition method in accordance with ASC 805, “Business Combinations,” in which assets acquired and liabilities assumed are recorded at fair value as of the date of acquisition. The operating results of the acquired business are included in the Company’s Consolidated Financial Statements from the date of the acquisition.

Hartland Controls

On January 28, 2021, the Company acquired Hartland Controls ("Hartland"), a manufacturer and leading supplier of electrical components used primarily in heating, ventilation, air conditioning (HVAC) and other industrial and control systems applications with annualized sales of approximately $70 million. The purchase price for Hartland was approximately $112.3 million and the operations of Hartland are included in the Industrial segment.

The total purchase consideration of $109.9 million, net of cash, cash equivalents, and restricted cash has been allocated, on a preliminary basis, to assets acquired and liabilities assumed, as of the completion of the acquisition, based on preliminary estimated fair values. The purchase consideration is subject to change for the final working capital adjustments. As of March 27, 2021, the Company had restricted cash of $1.7 million in an escrow account for general indemnification purposes. The purchase price allocation is preliminary because the evaluations necessary to assess the fair values of the net assets acquired are still in process. The primary areas that are not yet finalized relate to the completion of the valuations of certain acquired income tax assets and liabilities. As a result, these allocations are subject to change during the purchase price allocation period as the valuations are finalized.

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The following table summarizes the purchase price allocation of the fair value of assets acquired and liabilities assumed in the Hartland acquisition:

(in thousands)	Purchase Price Allocation
Total purchase consideration:
Cash, net of cash acquired, and restricted cash	$	109,852
Allocation of consideration to assets acquired and liabilities assumed:
Trade receivables, net	14,305
Inventories	36,306
Other current assets	2,384
Property, plant, and equipment	6,296
Intangible assets	39,660
Goodwill	38,929
Other non-current assets	3,542
Current liabilities	(25,024)
Other non-current liabilities	(6,546)
	$	109,852

All Hartland goodwill, other assets and liabilities were recorded in the Industrial segment and are primarily reflected in the Americas and Asia-Pacific geographic areas. The goodwill resulting from this acquisition consists largely of the Company’s expected future product sales and synergies from combining Hartland’s products and technology with the Company’s existing industrial products portfolio. Goodwill resulting from the Hartland acquisition is not expected to be deductible for tax purposes.

Included in the Company’s Condensed Consolidated Statements of Net Income for the three months ended March 27, 2021 are net sales of approximately $16.7 million, and a loss before income taxes of $2.2 million, since the January 28, 2021 acquisition of Hartland.

The Company recorded a $6.8 million step-up of inventory to its fair value as of the acquisition date based on the preliminary valuation. The step-up is being amortized as a non-cash charge to cost of goods sold during the first and second quarters of 2021, as the acquired inventory is sold, and reflected as other non-segment costs. During the three months ended March 27, 2021, the Company recognized a charge of $3.5 million for the amortization of this fair value inventory step-up.

During the three months ended March 27, 2021, the Company incurred approximately $0.7 million of legal and professional fees related to this acquisition recognized as Selling, general, and administrative expenses. These costs were reflected as other non-segment costs.

Pro Forma Results

The following table summarizes, on an unaudited pro forma basis, the combined results of operations of the Company and Hartland as though the acquisition had occurred as of December 29, 2019. The pro forma amounts presented are not necessarily indicative of either the actual consolidated results had the Hartland acquisition occurred as of December 29, 2019 or of future consolidated operating results.

	For the Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Net sales	$	470,832	$	363,617
Income before income taxes	77,288		31,431
Net income	61,317		21,438
Net income per share — basic	2.50		0.88
Net income per share — diluted	2.46		0.87

Pro forma results presented above primarily reflect the following adjustments:

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	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Amortization(a)	$	(279)	$	(834)
Depreciation	7		48
Transaction costs(b)	707		(707)
Amortization of inventory step-up(c)	3,490		(5,137)
Income tax (expense) benefit of above items	(831)		1,398

(a)The amortization adjustment for the three months ended March 28, 2020 primarily reflects incremental amortization resulting for the measurement of intangibles at their fair values.

(b)The transaction cost adjustments reflect the reversal of certain bank and attorney fees from the three months ended March 27, 2021 and recognition of those fees during the three months ended March 28, 2020.

(c)The amortization of inventory step-up adjustment reflects the reversal of the amount recognized during the three months ended March 27, 2021 and the recognition of a full quarter of the amortization during the three months ended March 28, 2020. The inventory step-up was amortized over four months as the inventory was sold.

3. Inventories

The components of inventories at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Raw materials	$	97,695	$	85,394
Work in process	102,285		92,783
Finished goods	130,138		114,641
Inventory Reserves	(35,061)		(34,816)
Total	$	295,057	$	258,002

4. Property, Plant, and Equipment

The components of net property, plant, and equipment at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Land	$	22,711	$	22,851
Building	124,192		123,497
Equipment	687,563		678,220
Accumulated depreciation and amortization	(489,552)		(480,390)
Total	$	344,914	$	344,178

The Company recorded depreciation expense of $13.7 million and $13.8 million for the three months ended March 27, 2021 and March 28, 2020, respectively.

5. Goodwill and Other Intangible Assets

The amounts for goodwill and changes in the carrying value by segment for the three months ended March 27, 2021 are as follows:

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(in thousands)	Electronics		Automotive		Industrial		Total
Net book value of goodwill as of December 26, 2020
Gross goodwill as of December 26, 2020	$	676,325	$	138,354	$	47,551	$	862,230
Accumulated impairment losses as of December 26, 2020	—		(36,423)		(8,995)		(45,418)
Total	676,325		101,931		38,556		816,812
Changes during 2021:
Additions(a)	—		—		38,929		38,929
Currency translation	(8,124)		(2,012)		(19)		(10,155)
Net book value of goodwill as of March 27, 2021
Gross goodwill as of March 27, 2021	668,201		136,229		86,461		890,891
Accumulated impairment losses as of March 27, 2021	—		(36,310)		(8,995)		(45,305)
Total	$	668,201	$	99,919	$	77,466	$	845,586

(a) The additions resulted from the acquisition of Hartland.

The components of other intangible assets as of March 27, 2021 and December 26, 2020 are as follows:

	As of March 27, 2021
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,251	$	2,051	$	8,200
Patents, licenses and software	142,732		94,636		48,096
Distribution network	43,704		39,307		4,397
Customer relationships, trademarks, and tradenames	400,253		143,652		256,601
Total	$	596,940	$	279,646	$	317,294

	As of December 26, 2020
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,280	$	2,007	$	8,273
Patents, licenses and software	137,210		92,868		44,342
Distribution network	43,910		38,980		4,930
Customer relationships, trademarks, and tradenames	372,064		137,722		234,342
Total	$	563,464	$	271,577	$	291,887

During the three months ended March 27, 2021 and March 28, 2020, the Company recorded amortization expense of $10.5 million and $10.0 million, respectively.

The Company recognized a $0.3 million non-cash impairment charge in the first quarter of 2020 on a certain patent triggered by the Company’s announcement to consolidate a manufacturing facility within the Industrial segment.

During the three months ended March 27, 2021, the Company recorded additions to intangible assets of $39.7 million, related to the Hartland acquisition, the components of which were as follows:

(in thousands)	Weighted Average Useful Life	Amount
Patents, licenses and software	9.2	$	7,559
Customer relationships, trademarks, and tradenames	13.7	32,101
Total		$	39,660

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Estimated annual amortization expense related to intangible assets with definite lives as of March 27, 2021 is as follows:

(in thousands)	Amount
2021	$	41,545
2022	40,791
2023	36,491
2024	33,054
2025	32,603
2026 and thereafter	143,331
Total	$	327,815

6. Accrued Liabilities

The components of accrued liabilities as of March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Employee-related liabilities	$	45,135	$	50,689
Operating lease liability	7,177		6,811
Interest	2,636		4,517
Restructuring liability	2,588		4,195
Customer liability	794		3,858
Professional services	3,010		3,321
Deferred revenue	2,713		2,959
Other non-income taxes	1,903		2,126
Other	32,398		32,002
Total	$	98,354	$	110,478

Employee-related liabilities consist primarily of payroll, sales commissions, bonus, employee benefit accruals and workers’ compensation. Bonus accruals include amounts earned pursuant to the Company’s primary employee incentive compensation plans. Other accrued liabilities include miscellaneous operating accruals and other client-related liabilities.

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7. Restructuring, Impairment and Other Charges

The Company recorded restructuring, impairment and other charges for the three months ended March 27, 2021 and March 28, 2020 as follows:

	Three months ended March 27, 2021
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	257	$	—	$	163	$	420
Other restructuring charges	—		17		—		17
Total restructuring charges	257		17		163		437
Impairment	—		—		—		—
Total	$	257	$	17	$	163	$	437

	Three months ended March 28, 2020
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	881	$	399	$	321	$	1,601
Other restructuring charges	1		120		3		124
Total restructuring charges	882		519		324		1,725
Impairment	—		—		2,237		2,237
Total	$	882	$	519	$	2,561	$	3,962

2021

For the three months ended March 27, 2021, the Company recorded total restructuring charges of $0.4 million, primarily for employee termination costs. These charges primarily related to the reorganization of certain manufacturing, selling and administrative functions within the Electronics and Industrial segments.

2020

For the three months ended March 28, 2020, the Company recorded total restructuring charges of $1.7 million, for employee termination costs and other restructuring charges. These charges primarily related to the reorganization of certain manufacturing, selling and administrative functions across all segments and the announced consolidation of a manufacturing facility within the Industrial segment. The Company also recognized $2.2 million of impairment charges related to the land and building associated with the Company’s announcement to consolidate a manufacturing facility within the Industrial segment.

The restructuring liability as of March 27, 2021 and December 26, 2020 is $2.6 million and $4.2 million, respectively. The restructuring liability is included within accrued liabilities in the Condensed Consolidated Balance Sheets. The Company anticipates the remaining payments associated with employee terminations will primarily be completed by the first quarter of 2022.

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8. Debt

The carrying amounts of debt at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Revolving Credit Facility	$	100,000	$	130,000
Euro Senior Notes, Series A due 2023	138,039		142,679
Euro Senior Notes, Series B due 2028	112,083		115,850
U.S. Senior Notes, Series A due 2022	25,000		25,000
U.S. Senior Notes, Series B due 2027	100,000		100,000
U.S. Senior Notes, Series A due 2025	50,000		50,000
U.S. Senior Notes, Series B due 2030	125,000		125,000
Other	2,619		2,619
Unamortized debt issuance costs	(3,876)		(4,114)
Total debt	648,865		687,034
Less: Current maturities	(25,000)		—
Total long-term debt	$	623,865	$	687,034

Revolving Credit Facility

On April 3, 2020, the Company amended its Credit Agreement to effect certain changes, including, among others: (i) eliminating the $200.0 million unsecured term loan credit facility, the remaining outstanding balance ($140.0 million) of which was repaid in full on April 3, 2020 through the revolving credit facility; (ii) making certain financial and non-financial covenants less restrictive on the Company; (iii) modifying performance-based interest rate margins and undrawn fees; and (iv) extending the maturity date to April 3, 2025. The amended Credit Agreement also allows the Company to increase the size of the revolving credit facility or enter into one or more tranches of term loans if there is no event of default and the Company is in compliance with certain financial covenants. The Company made payments of $30.0 million on the amended revolving credit facility during the three months ended March 27, 2021. The balance under the facility was $100.0 million as of March 27, 2021.

Outstanding borrowings under the amended Credit Agreement bears interest, at the Company’s option, at either LIBOR, fixed for interest periods of one, two, three or six-month periods, plus 1.25% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.25% to 1.00%, based upon the Company’s Consolidated Leverage Ratio, as defined. The Company was also required to pay commitment fees on unused portions of the credit agreement ranging from 0.125% to 0.20%, based on the Consolidated Leverage Ratio, as defined in the agreement. The amended Credit Agreement included representations, covenants and events of default that are customary for financing transactions of this nature. The effective interest rate on outstanding borrowings under the credit facility was 1.61% at March 27, 2021.

As of March 27, 2021, the Company had no amount outstanding in letters of credit and had available $571.3 million of borrowing capacity under the Revolving Credit Facility based on financial covenants. At March 27, 2021, the Company was in compliance with all covenants under the Credit Agreement.

Senior Notes

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold €212 million aggregate principal amount of senior notes in two series. The funding date for the Euro denominated senior notes occurred on December 8, 2016 for €117 million in aggregate amount of 1.14% Senior Notes, Series A, due December 8, 2023 (“Euro Senior Notes, Series A due 2023”), and €95 million in aggregate amount of 1.83% Senior Notes, Series B due December 8, 2028 (“Euro Senior Notes, Series B due 2028”) (together, the “Euro Senior Notes”). Interest on the Euro Senior Notes is payable semiannually on June 8 and December 8, commencing June 8, 2017.

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold $125 million aggregate principal amount of senior notes in two series. On February 15, 2017, $25 million in aggregate principal amount of 3.03% Senior Notes, Series A, due February 15, 2022 (“U.S. Senior Notes, Series A due 2022”), and $100 million in aggregate principal amount of 3.74% Senior Notes, Series B, due February 15, 2027 (“U.S. Senior Notes, Series B due 2027”)

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(together, the “U.S. Senior Notes due 2022 and 2027”) were funded. Interest on the U.S. Senior Notes due 2022 and 2027 is payable semiannually on February 15 and August 15, commencing August 15, 2017.

On November 15, 2017, the Company entered into a Note Purchase Agreement pursuant to which the Company issued and sold $175 million in aggregate principal amount of senior notes in two series. On January 16, 2018, $50 million aggregate principal amount of 3.48% Senior Notes, Series A, due February 15, 2025 (“U.S. Senior Notes, Series A due 2025”) and $125 million in aggregate principal amount of 3.78% Senior Notes, Series B, due February 15, 2030 (“U.S. Senior Notes, Series B due 2030”) (together the “U.S. Senior Notes due 2025 and 2030” and with the Euro Senior Notes and the U.S. Senior Notes due 2022 and 2027, the “Senior Notes”) were funded. Interest on the U.S. Senior Notes due 2025 and 2030 is payable semiannually on February 15 and August 15, commencing on August 15, 2018.

The Senior Notes have not been registered under the Securities Act, or applicable state securities laws. The Senior Notes are general unsecured senior obligations and rank equal in right of payment with all existing and future unsecured unsubordinated indebtedness of the Company.

The Senior Notes are subject to certain customary covenants, including limitations on the Company’s ability, with certain exceptions, to engage in mergers, consolidations, asset sales and transactions with affiliates, to engage in any business that would substantially change the general business of the Company, and to incur liens. In addition, the Company is required to satisfy certain financial covenants and tests relating to, among other matters, interest coverage and leverage. At March 27, 2021, the Company was in compliance with all covenants under the Senior Notes.

The Company may redeem the Senior Notes upon the satisfaction of certain conditions and the payment of a make-whole amount to noteholders and are required to offer to repurchase the Senior Notes at par following certain events, including a change of control.

Interest paid on all Company debt was $6.2 million and $7.4 million for the three months ended March 27, 2021 and March 28, 2020, respectively.

9. Fair Value of Assets and Liabilities

For assets and liabilities measured at fair value on a recurring and nonrecurring basis, a three-level hierarchy of measurements based upon observable and unobservable inputs is used to arrive at fair value. Observable inputs are developed based on market data obtained from independent sources, while unobservable inputs reflect the Company’s assumptions about valuation based on the best information available in the circumstances. Depending on the inputs, the Company classifies each fair value measurement as follows:

Level 1—Valuations based on unadjusted quoted prices for identical assets or liabilities in active markets;

Level 2—Valuations based upon quoted prices for similar instruments, prices for identical or similar instruments in markets that are not active, or model-derived valuations, all of whose significant inputs are observable, and

Level 3—Valuations based upon one or more significant unobservable inputs.

Following is a description of the valuation methodologies used for instruments measured at fair value and their classification in the valuation hierarchy.

Cash Equivalents

Cash equivalents primarily consist of money market funds, which are held with an institution with sound credit rating and are highly liquid. The Company classified cash equivalents as Level 1 and are valued at cost which approximates fair value.

Investments in Equity Securities

Investments in equity securities listed on a national market or exchange are valued at the last sales price and classified within Level 1 of the valuation hierarchy and recorded in investments and other assets.

Other Investments

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The Company has certain convertible debt and convertible preferred stock investments that are accounted for under the cost method reflected in other assets in the Condensed Consolidated Balance Sheets. As of March 27, 2021 and December 26, 2020, the balances of these investments were both $0.5 million. The fair value of these investments are measured on a nonrecurring basis using Level 3 inputs under the fair value hierarchy. The Company's accounting and finance management determines the valuation policies and procedures for Level 3 fair value measurements and is responsible for the development and determination of unobservable inputs.

Mutual Funds

The Company has a non-qualified Supplemental Retirement and Savings Plan which provides additional retirement benefits for certain management employees and named executive officers by allowing participants to defer a portion of their annual compensation. The Company maintains accounts for participants through which participants make investment elections. The marketable securities are classified as Level 1 under the fair value hierarchy as they are maintained in mutual funds with readily determinable fair value and recorded in other assets.

There were no changes during the quarter ended March 27, 2021 to the Company’s valuation techniques used to measure asset and liability fair values on a recurring basis. As of March 27, 2021 and December 26, 2020, the Company did not hold any non-financial assets or liabilities that are required to be measured at fair value on a recurring basis.

The following table presents assets measured at fair value by classification within the fair value hierarchy as of March 27, 2021:

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	66,565	$	—	$	—	$	66,565
Investments in equity securities	25,830		—		—		25,830
Mutual funds	13,397		—		—		13,397
Total	$	105,792	$	—	$	—	$	105,792

The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 26, 2020: 

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	73,461	$	—	$	—	$	73,461
Investments in equity securities	19,186		—		—		19,186
Mutual funds	13,249		—		—		13,249
Total	$	105,896	$	—	$	—	$	105,896

In addition to the methods and assumptions used for the financial instruments recorded at fair value as discussed above, the following methods and assumptions are used to estimate the fair value of other financial instruments that are not marked to market on a recurring basis. The Company’s other financial instruments include cash and cash equivalents, short-term investments, accounts receivable and its long-term debt. Due to their short-term maturity, the carrying amounts of cash and cash equivalents, short-term investments and accounts receivable approximate their fair values. The Company’s revolving credit facilities’ fair values approximate book value at March 27, 2021 and December 26, 2020, as the rates on these borrowings are variable in nature.

The carrying value and estimated fair values of the Company’s Euro Senior Notes, Series A and Series B and USD Senior Notes, Series A and Series B, as of March 27, 2021 and December 26, 2020 were as follows:

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	March 27, 2021				December 26, 2020
(in thousands)	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Euro Senior Notes, Series A due 2023	$	138,039	$	140,084	$	142,679	$	144,323
Euro Senior Notes, Series B due 2028	112,083		117,703		115,850		123,588
USD Senior Notes, Series A due 2022	25,000		25,375		25,000		25,437
USD Senior Notes, Series B due 2027	100,000		106,174		100,000		109,552
USD Senior Notes, Series A due 2025	50,000		52,817		50,000		53,474
USD Senior Notes, Series B due 2030	125,000		130,764		125,000		138,036

The Company recognized impairment charges of $1.9 million for the land and building and $0.3 million for a certain patent as a result of the Company’s announcement to consolidate a manufacturing facility within the Industrial segment during the first quarter of 2020. See Note 7, Restructuring, Impairment and Other Charges, for further discussion. The fair value of the land and building was valued using a real estate appraisal and classified as a Level 3 input under the fair value hierarchy.

10. Benefit Plans

The Company has company-sponsored defined benefit pension plans covering employees in the U.K., Germany, the Philippines, China, Japan, Mexico, Italy and France. The amount of the retirement benefits provided under the plans is based on years of service and final average pay.

The Company recognizes interest cost, expected return on plan assets, and amortization of prior service, net within Other (income) expense, net in the Condensed Consolidated Statements of Net Income. The components of net periodic benefit cost for the three months ended March 27, 2021 and March 28, 2020 were as follows: 

	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Components of net periodic benefit cost:
Service cost	$	702	$	618
Interest cost	440		658
Expected return on plan assets	(367)		(727)
Amortization of prior service and net actuarial loss	331		145
Net periodic benefit cost	$	1,106	$	694

The Company expects to make approximately $2.2 million of contributions to the plans and pay $3.8 million of benefits directly in 2021.

The Company also sponsors certain post-employment plans in foreign countries and other statutory benefit plans. The Company recorded expense of $0.5 million for both the three months ended March 27, 2021 and March 28, 2020, respectively, in Cost of Sales and Other (income) expense, net within the Condensed Consolidated Statements of Net Income. For the three months ended March 27, 2021 and March 28, 2020, the pre-tax amounts recognized in other comprehensive income (loss) as components of net periodic benefit costs for these plans were both $0.2 million.

On April 7, 2020, the Company entered into a definitive agreement to purchase a group annuity contract, under which an insurance company will be required to directly pay and administer pension payments to certain of the Company’s U.K. pension plan participants, or their designated beneficiaries. The purchase of this group annuity contract will reduce the Company’s outstanding pension benefit obligation by approximately $55 million, representing approximately 37% of the total obligations of the Company’s qualified pension plans, and will be funded with pension plan assets and additional cash on hand. In connection with this transaction, the Company will record a one-time non-cash settlement charge currently estimated between $18 million and $22 million in the fourth quarter of 2021, reflecting the accelerated recognition of unamortized actuarial losses

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in the plan. The actual amount and timing of the settlement charge could differ from this estimate due to final data and plan wind-up expenses. Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million (£10.9 million) to both the net pension liability and unamortized actuarial loss within other comprehensive income (loss) during the second quarter of 2020. Additionally, the Company made a cash contribution of $10.4 million (£8.4 million) under this agreement during the second quarter of 2020.

11. Other Comprehensive Income

Changes in other comprehensive income (loss) by component were as follows:

(in thousands)	Three Months Ended March 27, 2021						Three Months Ended March 28, 2020
	Pre-tax		Tax		Net of Tax		Pre-tax		Tax		Net of Tax
Defined benefit pension plan and other adjustments	$	506	$	52	$	454	$	555	$	(6)	$	561
Foreign currency translation adjustments	(5,325)		—		(5,325)		(15,540)		—		(15,540)
Total change in other comprehensive income (loss)	$	(4,819)	$	52	$	(4,871)	$	(14,985)	$	(6)	$	(14,979)

The following tables set forth the changes in accumulated other comprehensive (loss) by component for the three months ended March 27, 2021 and March 28, 2020:

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 26, 2020	$	(34,141)	$	(57,016)	$	(91,157)
Activity in the period	454		(5,325)		(4,871)
Balance at March 27, 2021	$	(33,687)	$	(62,341)	$	(96,028)

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 28, 2019	$	(18,046)	$	(88,777)	$	(106,823)
Activity in the period	561		(15,540)		(14,979)
Balance at March 28, 2020	$	(17,485)	$	(104,317)	$	(121,802)

Amounts reclassified from accumulated other comprehensive (loss) to earnings for the three months ended March 27, 2021 and March 28, 2020 were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Pension and Postemployment plans:
Amortization of prior service and net actuarial loss	$	504	$	345

The Company recognizes the amortization of prior service costs in Other (income) expense, net within the Condensed Consolidated Statements of Net Income.

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12. Income Taxes

The effective tax rate for the three months ended March 27, 2021 was 20.6%, compared to the effective tax rate for the three months ended March 28, 2020 of 30.6%. The effective tax rate for the 2021 period is lower than the effective tax rate for the comparable 2020 period primarily due to an increase in the forecasted income earned in lower tax jurisdictions in 2021 as compared to 2020. The effective tax rate for the 2021 period is approximately the same as the applicable U.S. statutory rate.

13. Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share: 

	Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Numerator:
Net income as reported	$	57,713	$	24,644
Denominator:
Weighted average shares outstanding
Basic	24,532		24,393
Effect of dilutive securities	360		185
Diluted	24,892		24,578
Earnings Per Share:
Basic earnings per share	$	2.35	$	1.01
Diluted earnings per share	$	2.32	$	1.00

Potential shares of common stock relating to stock options and restricted share units excluded from the earnings per share calculation because their effect would be anti-dilutive were 15 and 153,836 for the three months ended March 27, 2021 and March 28, 2020, respectively.

Share Repurchase Program

On April 26, 2019, the Company's Board of Directors authorized a program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2019 to April 30, 2020 ("2019 program"). On April 29, 2020, the Company announced that the Board of Directors authorized a new program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2020 to April 30, 2021 (the "2020 program") to replace its previous expired 2019 program. On April, 28, 2021, the Company announced that the Board of Directors authorized a new three year program to repurchase up to $300.0 million in the aggregate of shares of the Company’s common stock for the period May 1, 2021 to April 30, 2024 to replace its previous 2020 program.

The Company did not repurchase any shares of its common stock for the three months ended March 27, 2021. During the three months ended March 28, 2020, the Company repurchased 175,110 shares of its common stock totaling $22.9 million.

14. Related Party Transactions

The Company has equity ownership in various investments that are accounted for under the equity method. The following is a description of the investments and related party transactions.

Powersem GmbH: The Company owns 45% of the outstanding equity of Powersem GmbH (“Powersem”), a module manufacturer based in Germany.

EB-Tech Co., Ltd.: The Company owns approximately 19% of the outstanding equity of EB Tech Co., Ltd. (“EB Tech”), a company with expertise in radiation technology based in South Korea.

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Automated Technology (Phil), Inc.: The Company owns approximately 24% of the outstanding common shares of Automated Technology (Phil), Inc. (“ATEC”), a supplier located in the Philippines that provides assembly and test services. One member of the Company's Board of Directors serves on the Board of Directors of ATEC.

	For the Three Months Ended March 27, 2021						For the Three Months Ended March 28, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	0.2	$	—	$	—	$	0.4	$	—	$	—
Purchase material/service from related party	$	1.1	$	0.1	$	3.0	$	0.2	$	—	$	1.8
	March 27, 2021						December 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Accounts Receivable balance	$	—	$	—	$	—	$	0.1	$	—	$	—
Accounts Payable balance	$	0.2	$	—	$	0.3	$	0.1	$	—	$	0.2

Additionally, the Company has certain cost method investments in VTOOL Ltd. and Securepush Ltd. with a total book value of $0.5 million as of March 27, 2021 and December 26, 2020 and one member of the Company’s Board of Directors is currently an investor and a director of VTOOL Ltd. and Securepush Ltd.

15. Segment Information

The Company and its subsidiaries design, manufacture and sell components and modules empowering a sustainable, connected, and safer world. The Company reports its operations by the following segments: Electronics, Automotive, and Industrial. An operating segment is defined as a component of an enterprise that engages in business activities from which it may earn revenues and incur expenses, and about which separate financial information is regularly evaluated by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources. The CODM is the Company’s President and Chief Executive Officer (“CEO”). The CODM allocates resources to and assesses the performance of each operating segment using information about its revenue and operating income (loss) before interest and taxes, but does not evaluate the operating segments using discrete balance sheet information.

Sales, marketing, and research and development expenses are charged directly into each operating segment. Purchasing, logistics, customer service, finance, information technology, and human resources are shared functions that are allocated back to the three operating segments. The Company does not report inter-segment revenue because the operating segments do not record it. Certain expenses, determined by the CODM to be strategic in nature and not directly related to segments' current results, are not allocated but identified as “Other”. Additionally, the Company does not allocate interest and other income, interest expense, or taxes to operating segments. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Although the CODM uses operating income (loss) to evaluate the segments, operating costs included in one segment may benefit other segments. Except as discussed above, the accounting policies for segment reporting are the same as for the Company as a whole.

•Electronics Segment: Consists of one of the broadest product offerings in the industry, including fuses and fuse accessories, positive temperature coefficient (“PTC”) resettable fuses, polymer electrostatic discharge (“ESD”) suppressors, varistors, reed switch based magnetic sensing, gas discharge tubes; semiconductor products such as discrete transient voltage suppressor (“TVS”) diodes, TVS diode arrays, protection and switching thyristors, metal-oxide-semiconductor field effect transistors (“MOSFETs”) and silicon carbide diodes; and insulated gate bipolar transistors (“IGBT”) technologies. The segment covers a broad range of end markets, including industrial motor drives and power conversion, automotive electronics, electric vehicle and related infrastructure, power supplies, data centers and telecommunications, medical devices, alternative energy, building and home automation, appliances, and mobile electronics.

•Automotive Segment: Consists of a wide range of circuit protection, power control and sensing technologies for global original equipment manufacturers (“OEMs”), Tier-I suppliers and parts distributors in passenger car, heavy duty truck, off-road vehicles, material handling, agricultural, construction and other commercial vehicle end markets. Passenger car fuse products for internal combustion engine, hybrid and electric vehicles including blade fuses, battery cable

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protectors, resettable fuses, high-current fuses, and high-voltage fuses. Commercial vehicle products include fuses, switches, relays, and power distribution modules used in applications serving a number of end markets, including heavy truck, construction, agriculture and material handling. Automotive sensor products include a wide range of automotive and commercial vehicle products designed to monitor the passenger compartment occupant's safety and environment as well as the vehicle’s powertrain.

•Industrial Segment: Consists of industrial circuit protection products (i.e. fuses, power distribution modules, switches) and industrial control products (i.e. relays, transformers, contactors, sensors). These products are used in a variety of applications and end-markets including: Renewable Energy, Energy Storage, HVAC, Electric Vehicle Infrastructure, Industrial Equipment, Industrial Automation, Construction, Mining, and Oil & Gas.

Segment information is summarized as follows: 

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
Electronics	$	286,535	$	214,189
Automotive	128,529		104,770
Industrial	48,730		27,137
Total net sales	$	463,794	$	346,096
Depreciation and amortization
Electronics	$	15,381	$	15,531
Automotive	7,073		7,187
Industrial	1,744		1,084
Total depreciation and amortization	$	24,198	$	23,802
Operating income
Electronics	$	55,523	$	32,272
Automotive	20,316		14,116
Industrial	3,506		3,534
Other(a)	(2,864)		(5,172)
Total operating income	76,481		44,750
Interest expense	4,673		5,418
Foreign exchange loss	6,837		2,584
Other (income) expense, net	(7,737)		1,249
Income before income taxes	$	72,708	$	35,499

(a) Included in “Other” Operating income for the first quarter of 2021 was $3.5 million of purchase accounting inventory step-up charges, $0.8 million of legal and professional fees and other expenses related to Hartland and other contemplated acquisitions and $0.4 million of restructuring, impairment and other charges, primarily related to employee termination costs. See Note 7, Restructuring, Impairment and Other Charges, for further discussion. In addition, there was a $1.9 million gain from the sale of a building within the Electronics segment.

Included in "Other" Operating income for the first quarter of 2020 was $1.2 million of acquisition integration charges related to the IXYS acquisition and other contemplated acquisitions. In addition, there were $4.0 million of restructuring, impairment and other charges, primarily related to impairment charges of $2.2 million associated with the announced consolidation of a manufacturing facility within the Industrial segment and $1.7 million of employee termination costs and other restructuring charges. See Note 7, Restructuring, Impairment and Other Charges, for further discussion.

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The Company’s net sales by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
United States	$	130,931	$	102,910
China	139,158		86,015
Other countries(a)	193,705		157,171
Total net sales	$	463,794	$	346,096

 The Company’s long-lived assets by country were as follows:

(in thousands)	March 27, 2021		December 26, 2020
Long-lived assets
United States	$	48,908	$	46,132
China	85,280		85,876
Mexico	72,499		70,125
Germany	36,227		37,976
Philippines	66,956		66,994
Other countries(a)	35,044		37,075
Total long-lived assets	$	344,914	$	344,178

The Company’s additions to long-lived assets by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Additions to long-lived assets
United States	$	683	$	580
China	2,142		1,657
Mexico	6,121		2,592
Germany	593		753
Philippines	2,443		3,218
Other countries(a)	754		2,508
Total additions to long-lived assets	$	12,736	$	11,308

(a)Each country included in other countries is less than 10% of net sales.

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

Cautionary Statement Regarding Forward-Looking Statements Under the Private Securities Litigation Reform Act of 1995 (“PSLRA”).

Certain statements in this section and other parts of this Quarterly Report on Form 10-Q may constitute "forward-looking statements" within the meaning of the federal securities laws and are entitled to the safe-harbor provisions of the PSLRA. These statements include statements regarding the Company’s future performance, as well as management's expectations, beliefs, intentions, plans, estimates or projections relating to the future. Such statements can be identified by the use of forward-looking terminology such as "believes," "expects," "may," "estimates," "will," "should," "plans" or "anticipates" or the negative thereof or other variations thereon or comparable terminology, or by discussions of strategy, although not all forward-looking statements contain such terms. The Company cautions that forward-looking statements, which speak only as of the date they are made, are subject to risks, uncertainties and other factors, and actual results and outcomes may differ materially from those indicated or implied by the forward-looking statements. These risks, uncertainties and other factors include, but are not limited to, risks and uncertainties relating to general economic conditions; the severity and duration of the coronavirus disease 2019 ("COVID-19") pandemic and the measures taken in response thereto and the effects of those items on the Company’s business; product demand and market acceptance; economic conditions; the impact of competitive products and pricing; product quality problems or product recalls; capacity and supply difficulties or constraints; coal mining exposures reserves; failure of an indemnification for environmental liability; exchange rate fluctuations; commodity price fluctuations; the effect of the Company's accounting policies; labor disputes; restructuring costs in excess of expectations; pension plan asset returns less than assumed; uncertainties related to political or regulatory changes; integration of acquisitions may not be achieved in a timely manner, or at all; and other risks that may be detailed in Item 1A. "Risk Factors" of the Company's Annual Report on Form 10-K for the year ended December 26, 2020, and the Company's other filings and submissions with the Securities and Exchange Commission. The Company does not undertake any obligation to update or revise any forward-looking statements to reflect future events or circumstances, new information or otherwise.

This report, including the Management’s Discussion and Analysis of Financial Condition and Results of Operations, should be read in conjunction with information provided in the consolidated financial statements and the related Notes thereto appearing in the Company's Annual Report on Form 10-K for the year ended December 26, 2020. 

Management’s Discussion and Analysis of Financial Condition and Results of Operations ("MD&A") is designed to provide information that is supplemental to, and should be read together with, the consolidated financial statements and the accompanying notes. Information in MD&A is intended to assist the reader in obtaining an understanding of (i) the consolidated financial statements, (ii) the changes in certain key items within those financial statements from year-to-year, (iii) the primary factors that contributed to those changes, and (iv) any changes in known trends or uncertainties that we are aware of and that may have a material effect on future performance. In addition, MD&A provides information about the Company’s segments and how the results of those segments impact the results of operations and financial condition as a whole.

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Executive Overview

Founded in 1927, Littelfuse is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 12,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation and electronics end markets – everywhere, every day.

The Company maintains a network of global laboratories and engineering centers that develop new products and product enhancements, provide customer application support and test products for safety, reliability, and regulatory compliance. The Company conducts its business through three reportable segments: Electronics, Automotive, and Industrial. Within these segments, the Company designs, manufactures and sells components and modules empowering a sustainable, connected, and safer world. Our products protect against electrostatic discharge, power surges, short circuits, voltage spikes and other harmful occurrences, safely and efficiently control power and improve productivity and are used to identify and detect temperature, proximity, flow speed and fluid level in various applications.

Executive Summary

For the first quarter of 2021, the Company recognized net sales of $463.8 million compared to $346.1 million in the first quarter of 2020 representing an increase of $117.7 million, or 34.0%. The increase was driven by higher volumes across all businesses in the Electronics and Automotive segments, $16.7 million or 3.6% of net sales from the Hartland acquisition within the Industrial segment and $12.4 million or 3.6% of favorable changes in foreign exchange rates. The Company recognized net income of $57.7 million, or $2.32 per diluted share, in the first quarter of 2021 compared to net income of $24.6 million, or $1.00 per diluted share in the first quarter of 2020. The increase in net income reflects higher operating income of $31.7 million driven by a $23.3 million and $6.2 million increase in operating income in the Electronics and Automotive segments, respectively, increases of $9.7 million of unrealized gains associated with our equity investments partially offset by higher foreign exchange losses of $4.3 million.

On January 28, 2021, the Company acquired Hartland Controls ("Hartland"), a manufacturer and leading supplier of electrical components used primarily in heating, ventilation, air conditioning (HVAC) and other industrial and control systems applications with annualized sales of approximately $70 million. The purchase price for Hartland was approximately $112.3 million and the operations of Hartland are included in the Industrial segment.

Net cash provided by operating activities was $50.2 million for the three months ended March 27, 2021 as compared to $45.3 million for the three months ended March 28, 2020. The increase in net cash provided by operating activities was primarily due to higher cash earnings partially offset by increases in working capital resulting from higher sales growth.

Impact of COVID-19 on Business

The effects from COVID-19 continue to drive increased costs, though lower than 2020 levels. Ongoing costs include spending on personal protective equipment ("PPE"), additional personnel and employee transportation costs, and manufacturing inefficiencies, as well as an increase in freight costs due to the transportation capacity constraints across the world.

The Company anticipates that the global health crisis caused by COVID-19 may continue to negatively impact its business activity for the foreseeable future. It is currently difficult to estimate the magnitude of the COVID-19 disruption, if future disruptions will occur due to a resurgence in COVID-19 cases and its impact on our employees, customers, suppliers and vendors. The Company will continue to actively monitor the situation and may take further actions altering our business operations that we determine are in the best interests of our employees, customers, partners, suppliers, and other stakeholders, or as required by federal, state, or local authorities. It is not clear what the potential effects any such alterations or modifications may have on our business and operations, including the effects on our customers, employees, and prospects, or on our financial results for the fiscal year 2021.

Results of Operations

The following table summarizes the Company’s unaudited condensed consolidated results of operations for the periods presented. The first quarter of 2021 includes $3.5 million of purchase accounting inventory step-up charges, $0.8 million of legal and professional fees and other expenses related to Hartland and other contemplated acquisitions and $0.4 million of

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restructuring, impairment and other charges, primarily related to employee termination costs. In addition, there was a $1.9 million gain from the sale of a building within the Electronics segment.

The first quarter of 2020 includes $1.2 million of acquisition integration charges related to the IXYS acquisition and other contemplated acquisitions. In addition, there were $4.0 million of restructuring, impairment and other charges, primarily related to impairment charges of $2.2 million associated with the announced consolidation of a manufacturing facility within the Industrial segment and $1.7 million of employee termination costs and other restructuring charges.

	First Quarter
(in thousands)	2021		2020		Change		% Change
Net sales	$	463,794	$	346,096	$	117,698	34.0	%
Cost of sales	303,328		221,740		81,588		36.8	%
Gross profit	160,466		124,356		36,110		29.0	%
Operating expenses	83,985		79,606		4,379		5.5	%
Operating income	76,481		44,750		31,731		70.9	%
Income before income taxes	72,708		35,499		37,209		104.8	%
Income taxes	14,995		10,855		4,140		38.1	%
Net income	$	57,713	$	24,644	$	33,069	134.2	%

Net Sales

Net sales increased $117.7 million or 34.0% including $12.4 million or 3.6% of favorable changes in foreign exchange rates for the first quarter of 2021 compared to the first quarter of 2020. The increase was primarily due to higher sales of $72.3 million and $23.8 million, respectively, in the Electronics and Automotive segments driven by higher volumes across all businesses within these segments. The volume increase within the Electronics segment was led by greater customer demand for products and devices for work-from-home and stay-at-home needs, and strong global automotive demand driving an increase for products used in automotive electronics and electric vehicles. The volume increase within the Automotive segment was due to stronger global auto and commercial vehicle market demand. The remaining increase in net sales was due to $16.7 million of net sales resulting from the Hartland acquisition included in the Industrial segment.

Cost of Sales

Cost of sales was $303.3 million, or 65.4% of net sales, in 2021, compared to $221.7 million, or 64.1% of net sales, in 2020. The increase in cost of sales was primarily due to greater volume in the Electronics and Automotive segments driven by the factors discussed above along with the acquisition of Hartland. As a percent of net sales, cost of sales increased 1.3% driven by higher freight costs of $7.3 million, or 0.9%, the Hartland purchase accounting inventory charges of $3.5 million or 0.8%, and higher commodity costs partially offset by cost reductions.

Gross Profit

Gross profit was $160.5 million, or 34.6% of net sales, in the first quarter of 2021 compared to $124.4 million, or 35.9% of net sales, for the first quarter of 2020. The $36.1 million increase in gross profit was primarily due to higher volume in the Electronics and Automotive segments. The decrease in gross margin of 1.3% was primarily due to the higher freight costs of $7.3 million or 0.9%, the purchase accounting inventory charges of $3.5 million or 0.8%, higher commodity costs, and unfavorable price and foreign exchange partially offset by higher volumes within the Electronics and Automotive segments.

Operating Expenses

Total operating expenses were $84.0 million, or 18.1% of net sales, for the first quarter of 2021 compared to $79.6 million, or 23.0% of net sales, for the first quarter of 2020. The increase in operating expenses of $4.4 million was primarily due to higher selling, general and administrative expenses of $7.1 million largely due to higher accrued incentive compensation and the

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Hartland acquisition partially offset by a $1.9 million gain from the sale of a building within the Electronics segment. The increase in operating expenses was also partially offset by lower restructuring, impairment and other charges of $3.5 million.

Operating Income

Operating income was $76.5 million, an increase of $31.7 million, or 70.9%, for the first quarter of 2021 compared to $44.8 million for the first quarter of 2020. The increase in operating income was primarily due to higher gross profit from the Electronics and Automotive segments. Operating margins increased from 12.9% in the first quarter of 2020 to 16.5% in the first quarter of 2021 driven by the factors mentioned above.

Income Before Income Taxes

Income before income taxes was $72.7 million, or 15.7% of net sales, for the first quarter of 2021 compared to $35.5 million, or 10.3% of net sales, for the first quarter of 2020. In addition to the factors impacting comparative results for operating income discussed above, income before income taxes was primarily impacted by increases of $9.7 million of unrealized gains associated with our equity investments partially offset by higher foreign exchange losses of $4.3 million.

Income Taxes

Income tax expense for the first quarter of 2021 was $15.0 million, or an effective tax rate of 20.6%, compared to income tax expense of $10.9 million, or an effective tax rate of 30.6%, for the first quarter of 2020. The effective tax rate for the first quarter of 2021 is lower than the effective tax rate for the comparable 2020 period, primarily due to an increase in the forecasted income earned in lower tax jurisdictions in 2021 compared to 2020. The effective tax rate for the 2021 period is approximately the same as the applicable U.S. statutory rate.

Segment Results of Operations

The Company reports its operations by the following segments: Electronics, Automotive and Industrial. Segment information is described more fully in Note 15, Segment Information, of the Notes to Condensed Consolidated Financial Statements included in this Quarterly Report.

The following table is a summary of the Company’s net sales by segment:

	First Quarter
(in thousands)	2021		2020		Change		% Change
Electronics	$	286,535	$	214,189	$	72,346	33.8	%
Automotive	128,529		104,770		23,759		22.7	%
Industrial	48,730		27,137		21,593		79.6	%
Total	$	463,794	$	346,096	$	117,698	34.0	%

Electronics Segment

Net sales increased $72.3 million, or 33.8%, in the first quarter of 2021 compared to the first quarter of 2020 and included favorable changes in foreign exchange rates of $6.5 million. The sales increase was primarily due to increased volume for the electronics products and semiconductor businesses of $47.8 million and $24.5 million, respectively. The volume increases were led by greater customer demand for products and devices for work-from-home and stay-at-home needs, and strong global automotive demand driving an increase for products used in automotive electronics and electric vehicles. The first quarter of 2020 also included production disruptions due to the impact of COVID-19. 

Automotive Segment

Net sales increased $23.8 million, or 22.7%, in the first quarter of 2021 compared to the first quarter of 2020 and included favorable changes in foreign exchange rates of $5.6 million. The sales increase was due to higher volume in passenger car products, commercial vehicle products, and the automotive sensors business of $15.3 million, $4.4 million, and $4.1 million,

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respectively. These increases were due to stronger global auto and commercial vehicle market demand. Our Asia region experienced the most growth driven by an increase in global auto market demand as compared to the first quarter of 2020 that had production disruptions due to the impact of COVID-19. Sales also grew due to the launch of new products and higher content per vehicle.

Industrial Segment

Net sales increased by $21.6 million, or 79.6%, in the first quarter of 2021 compared to the first quarter of 2020, which included favorable changes in foreign exchange rates of $0.3 million. The increase in net sales was primarily due to incremental net sales of $16.7 million or 61.5% from the Hartland acquisition, higher volume of $4.5 million in the power fuse business, and the transfer of the temperature sensor product line totaling $1.9 million which was previously reported in the Electronics segment, partially offset by lower volume in the relay business.

Geographic Net Sales Information

Net sales by geography represent net sales to customer or distributor locations. The following table is a summary of the Company’s net sales by geography:

	First Quarter
(in thousands)	2021		2020		Change		% Change
Asia-Pacific	$	212,185	$	140,873	$	71,312	50.6	%
Americas	152,906		120,501		32,405		26.9	%
Europe	98,703		84,722		13,981		16.5	%
Total	$	463,794	$	346,096	$	117,698	34.0	%

Asia-Pacific 

Net sales increased $71.3 million, or 50.6%, in the first quarter of 2021 compared to the first quarter of 2020 and included favorable changes in foreign exchange rates of $4.2 million. The increase in net sales was primarily due to higher volume across all businesses within the Electronics and Automotive segments, compared to the first quarter of 2020 that had production disruptions due to the impact of COVID-19.

Americas

Net sales increased $32.4 million, or 26.9%, in the first quarter of 2021 compared to the first quarter of 2020 and included favorable changes in foreign exchange rates of $0.1 million. The increase in net sales was primarily due to incremental sales of $16.7 million from the Hartland acquisition, higher volume across all businesses within the Electronics segment, and higher volume in the passenger car products and commercial vehicle businesses within the Automotive segment.

Europe 

Net sales increased $14.0 million, or 16.5%, in the first quarter of 2021 compared to the first quarter of 2020. The increase in net sales was primarily due to favorable changes in foreign exchange rates of $8.1 million and increased volume across all businesses within the Automotive segment and Electronics products business within the Electronics segment, partially offset by lower volume in the semiconductor business within the Electronics segment.

Liquidity and Capital Resources 

The Company has historically supported its liquidity needs through cash flows from operations. Management expects that the Company’s (i) current level of cash, cash equivalents, and marketable securities, (ii) current and forecasted cash flows from operations, (iii) availability under existing funding arrangements, and (iv) access to capital in the capital markets will provide sufficient funds to support the Company’s operations, capital expenditures, investments, and debt obligations on both a short-term and long-term basis.

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Cash and cash equivalents were $572.8 million as of March 27, 2021, a decrease of $114.8 million as compared to December 26, 2020. As of March 27, 2021, $306.6 million of the Company's $572.8 million cash and cash equivalents was held by U.S. subsidiaries.

Revolving Credit Facility

On April 3, 2020, the Company amended its Credit Agreement to effect certain changes, including, among others: (i) eliminating the $200.0 million unsecured term loan credit facility, the remaining outstanding balance ($140.0 million) of which was repaid in full on April 3, 2020 through the revolving credit facility; (ii) making certain financial and non-financial covenants less restrictive on the Company; (iii) modifying performance-based interest rate margins and undrawn fees; and (iv) extending the maturity date to April 3, 2025. The amended Credit Agreement also allows the Company to increase the size of the revolving credit facility or enter into one or more tranches of term loans if there is no event of default and the Company is in compliance with certain financial covenants. The Company made payments of $30.0 million on the amended revolving credit facility during the three months ended March 27, 2021. The balance under the facility was $100.0 million as of March 27, 2021.

Outstanding borrowings under the amended Credit Agreement bears interest, at the Company’s option, at either LIBOR, fixed for interest periods of one, two, three or six-month periods, plus 1.25% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.25% to 1.00%, based upon the Company’s Consolidated Leverage Ratio, as defined. The Company was also required to pay commitment fees on unused portions of the credit agreement ranging from 0.125% to 0.20%, based on the Consolidated Leverage Ratio, as defined in the agreement. The amended Credit Agreement included representations, covenants and events of default that are customary for financing transactions of this nature. The effective interest rate on outstanding borrowings under the credit facility was 1.61% at March 27, 2021.

As of March 27, 2021, the Company had no amount outstanding in letters of credit and had available $571.3 million of borrowing capacity under the Revolving Credit Facility based on financial covenants. At March 27, 2021, the Company was in compliance with all covenants under the Credit Agreement.

Senior Notes

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold €212 million aggregate principal amount of senior notes in two series. The funding date for the Euro denominated senior notes occurred on December 8, 2016 for €117 million in aggregate amount of 1.14% Senior Notes, Series A, due December 8, 2023 (“Euro Senior Notes, Series A due 2023”), and €95 million in aggregate amount of 1.83% Senior Notes, Series B due December 8, 2028 (“Euro Senior Notes, Series B due 2028”) (together, the “Euro Senior Notes”). Interest on the Euro Senior Notes is payable semiannually on June 8 and December 8, commencing June 8, 2017.

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold $125 million aggregate principal amount of senior notes in two series. On February 15, 2017, $25 million in aggregate principal amount of 3.03% Senior Notes, Series A, due February 15, 2022 (“U.S. Senior Notes, Series A due 2022”), and $100 million in aggregate principal amount of 3.74% Senior Notes, Series B, due February 15, 2027 (“U.S. Senior Notes, Series B due 2027”) (together, the “U.S. Senior Notes due 2022 and 2027”) were funded. Interest on the U.S. Senior Notes due 2022 and 2027 is payable semiannually on February 15 and August 15, commencing August 15, 2017.

On November 15, 2017, the Company entered into a Note Purchase Agreement pursuant to which the Company issued and sold $175 million in aggregate principal amount of senior notes in two series. On January 16, 2018, $50 million aggregate principal amount of 3.48% Senior Notes, Series A, due February 15, 2025 (“U.S. Senior Notes, Series A due 2025”) and $125 million in aggregate principal amount of 3.78% Senior Notes, Series B, due February 15, 2030 (“U.S. Senior Notes, Series B due 2030”) (together the “U.S. Senior Notes due 2025 and 2030” and with the Euro Senior Notes and the U.S. Senior Notes due 2022 and 2027, the “Senior Notes”) were funded. Interest on the U.S. Senior Notes due 2025 and 2030 is payable semiannually on February 15 and August 15, commencing on August 15, 2018. Further information regarding the Company’s Senior Notes is provided in Note 8, Debt, of the Notes to the Condensed Consolidated Financial Statements included in this Quarterly Report.

Debt Covenants

The Company was in compliance with all covenants under the Credit Agreement and Senior Notes as of March 27, 2021 and currently expects to remain in compliance based on management’s estimates of operating and financial results for 2021. As of March 27, 2021, the Company met all the conditions required to borrow under the Credit Agreement and management expects the Company to continue to meet the applicable borrowing conditions.

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Acquisitions

On January 28, 2021, the Company acquired Hartland Controls ("Hartland"), a manufacturer and leading supplier of electrical components used primarily in heating, ventilation, air conditioning (HVAC) and other industrial and control systems applications with annualized sales of approximately $70 million. The purchase price for Hartland was approximately $112.3 million and the operations of Hartland Controls are included in the Industrial segment. The net cash payment of $109.9 million for this acquisition was funded by the Company's cash on hand.

Dividends

During the first quarter of 2020 the Company paid quarterly dividends of $11.8 million to the shareholders. On April 28, 2021, the Board of Directors of the Company declared a quarterly cash dividend of $0.48 per share, payable on June 3, 2021 to stockholders of record as of May 20, 2021.

U.K. pension plan

On April 7, 2020, the Company entered into a definitive agreement to purchase a group annuity contract, under which an insurance company will be required to directly pay and administer pension payments to certain of the Company’s U.K. pension plan participants, or their designated beneficiaries. The purchase of this group annuity contract will reduce the Company’s outstanding pension benefit obligation by approximately $55 million, representing approximately 37% of the total obligations of the Company’s qualified pension plans, and will be funded with pension plan assets and additional cash on hand. In connection with this transaction, the Company will record a one-time non-cash settlement charge currently estimated between $18 million and $22 million in the fourth quarter of 2021, reflecting the accelerated recognition of unamortized actuarial losses in the plan. The actual amount and timing of the settlement charge could differ from this estimate due to final data and plan wind-up expenses. Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million (£10.9 million) to both the net pension liability and unamortized actuarial loss within other comprehensive income (loss) during the second quarter of 2020. Additionally, the Company made a cash contribution of $10.4 million (£8.4 million) under this agreement during the second quarter of 2020.

Cash Flow Overview

	First three Months
(in thousands)	2021		2020
Net cash provided by operating activities	$	50,166	$	45,279
Net cash used in investing activities	(122,020)		(16,536)
Net cash (used in) provided by financing activities	(34,273)		65,804
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4,101)		(5,111)
(Decrease) increase in cash, cash equivalents, and restricted cash	(110,228)		89,436
Cash, cash equivalents, and restricted cash at beginning of period	687,525		531,139
Cash, cash equivalents, and restricted cash at end of period	$	577,297	$	620,575

Cash Flow from Operating Activities

Operating cash inflows are largely attributable to sales of the Company’s products. Operating cash outflows are largely attributable to recurring expenditures for raw materials, labor, rent, interest, taxes and other operating activities.

Net cash provided by operating activities was $50.2 million for the three months ended March 27, 2021 as compared to $45.3 million for the three months ended March 28, 2020. The increase in net cash provided by operating activities was primarily due to higher cash earnings partially offset by increases in working capital resulting from higher sales growth. 

Cash Flow from Investing Activities

Net cash used in investing activities was $122.0 million for the three months ended March 27, 2021 compared to $16.5 million during the three months ended March 28, 2020. Net cash paid for the Hartland acquisition was $109.9 million for the three

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months ended March 27, 2021. Capital expenditures were $14.7 million, representing a decrease of $1.9 million compared to 2020. During the three months ended March 28, 2020, the Company received proceeds of $2.6 million from the sale of a property within the Electronics segment.

Cash Flow from Financing Activities

Net cash used in financing activities was $34.3 million for the three months ended March 27, 2021 compared to net cash provided by financing activities of $65.8 million for the three months ended March 28, 2020. The Company made payments of $30.0 million on the amended revolving credit facility during the first quarter of 2021. During the three months ended March 28, 2020, the Company made principal payments of $2.5 million on the term loan and borrowed $100.0 million from its revolving credit facility to preserve financial flexibility and enhance liquidity, given the increasing levels of uncertainty related to COVID-19. For the three months ended March 28, 2020, the Company repurchased 175,110 shares of its common stock totaling $22.9 million. Additionally, the Company paid dividends $11.8 million and $11.7 million in the three months ended March 27, 2021 and March 28, 2020, respectively.

Share Repurchase Program

On April 26, 2019, the Company's Board of Directors authorized a program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2019 to April 30, 2020 ("2019 program"). On April 29, 2020, the Company announced that the Board of Directors authorized a new program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2020 to April 30, 2021 (the "2020 program") to replace its previous expired 2019 program. On April, 28, 2021, the Company announced that the Board of Directors authorized a new three year program to repurchase up to $300.0 million in the aggregate of shares of the Company’s common stock for the period May 1, 2021 to April 30, 2024 to replace its previous 2020 program.

The Company did not repurchase any shares of its common stock for the three months ended March 27, 2021. During the three months ended March 28, 2020, the Company repurchased 175,110 shares of its common stock totaling $22.9 million.

Off-Balance Sheet Arrangements

As of March 27, 2021, the Company did not have any off-balance sheet arrangements, as defined under SEC rules. Specifically, the Company was not liable for guarantees of indebtedness owed by third parties, the Company was not directly liable for the debt of any unconsolidated entity and the Company did not have any retained or contingent interest in assets. The Company does not participate in transactions that generate relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities.

Critical Accounting Policies and Estimates

The Company’s Condensed Consolidated Financial Statements are prepared in accordance with U.S. GAAP. In connection with the preparation of the Condensed Consolidated Financial Statements, the Company uses estimates and makes judgments and assumptions about future events that affect the reported amounts of assets, liabilities, revenue, expenses, and the related disclosures. The assumptions, estimates, and judgments are based on historical experience, current trends, and other factors the Company believes are relevant at the time it prepares the Condensed Consolidated Financial Statements.

The significant accounting policies and critical accounting estimates are consistent with those discussed in Note 1, Summary of Significant Accounting Policies and Other Information, to the consolidated financial statements and the MD&A section of the Company’s Annual Report on Form 10-K for the year ended December 26, 2020. During the three months ended March 27, 2021, there were no significant changes in the application of critical accounting policies.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

See Item 7A, Quantitative and Qualitative Disclosures about Market Risk, of our Annual Report on Form 10-K for the year ended December 26, 2020. During the three months ended March 27, 2021, there have been no material changes in our exposure to market risk.

ITEM 4. CONTROLS AND PROCEDURES 

(a) Evaluation of Disclosure Controls and Procedures

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Disclosure controls and procedures (as defined in Rules 13a-15(b) and 15d-15(e) under the Exchange Act) are designed to ensure that information required to be disclosed in reports filed or submitted under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in the SEC rules and forms, and that such information is accumulated and communicated to management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosures.

In connection with the preparation of this report, management, under the supervision and with the participation of the Chief Executive Officer and Chief Financial Officer, conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures as of March 27, 2021. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the quarter ended March 27, 2021, our disclosure controls and procedures were effective.

(b) Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rules 13a-15(f) and 15d-15(f) under the Exchange Act that occurred during the quarter ended March 27, 2021 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS 

None.

ITEM 1A. RISK FACTORS 

There have been no material changes in our risk factors from those disclosed in our Annual Report on Form 10-K for our year ended December 26, 2020.

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

Recent Sales of Unregistered Securities

None.

Purchases of Equity Securities

On April 26, 2019, the Company's Board of Directors authorized a program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2019 to April 30, 2020 ("2019 program"). On April 29, 2020, the Company announced that the Board of Directors authorized a new program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2020 to April 30, 2021 (the "2020 program") to replace its previous expired 2019 program. On April, 28, 2021, the Company announced that the Board of Directors authorized a new three year program to repurchase up to $300.0 million in the aggregate of shares of the Company’s common stock for the period May 1, 2021 to April 30, 2024 to replace its previous 2020 program.

The Company did not repurchase any shares of its common stock for the three months ended March 27, 2021. During the three months ended March 28, 2020, the Company repurchased 175,110 shares of its common stock totaling $22.9 million.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES 

None.

ITEM 4. MINE SAFETY DISCLOSURES 

None.

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ITEM 5. OTHER INFORMATION 

None.

ITEM 6. EXHIBITS

Exhibit	Description
10.1*	Hartland Credit Agreement Joinder Agreement
10.2*	Subsidiary Guarantor Supplement (Domestic NPA) - Hartland Subsidiaries
10.3*	Subsidiary Guarantor Supplement (Cross-Border NPA) - Hartland Subsidiaries
10.4*	Subsidiary Guarantor Supplement (Fall 2017 NPA) - Hartland Subsidiaries
31.1*	Certification of David W. Heinzmann, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Meenal A. Sethna, Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101	The following financial information from LITTELFUSE, Inc.'s Quarterly Report on Form 10-Q for the quarter ended March 27, 2021 formatted in Inline XBRL (Extensible Business Reporting Language) includes: (i) the Condensed Consolidated Balance Sheets, (ii) the Condensed Consolidated Statements of Net Income, (iii) the Condensed Consolidated Statements of Comprehensive Income, (iv) the Consolidated Statements of Stockholders' Equity , (v) the Condensed Consolidated Statements of Cash Flows, and (vi) Notes to the Condensed Consolidated Financial Statements.
104	The cover page from this Quarterly Report on Form 10-Q for the quarter ended March 27, 2021, formatted in Inline XBRL.
*	Filed herewith.
**	Furnished herewith.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Quarterly Report on Form 10-Q for the quarter ended March 27, 2021, to be signed on its behalf by the undersigned thereunto duly authorized.

	Littelfuse, Inc.
	By:	/s/ Meenal A. Sethna
		Meenal A. Sethna
	Executive Vice President and Chief Financial Officer
Date: April 28, 2021	By:	/s/ Jeffrey G. Gorski
		Jeffrey G. Gorski
	Vice President and Chief Accounting Officer

35

EX-10.1

EXHIBIT 10.1

JOINDER AGREEMENT

THIS JOINDER AGREEMENT (the “Agreement”), dated as of March 5, 2021, is by and between (i) each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, a “Subsidiary”), and (ii) BANK OF AMERICA, N.A., in its capacity as Agent under that certain Amended and Restated Credit Agreement (as it may be amended, modified, restated or supplemented from time to time, the “Credit Agreement”), dated as of April 3, 2020, by and among LITTELFUSE, INC., a Delaware corporation (the “Company”), the Designated Borrowers, the Guarantors, the Lenders and Bank of America, N.A., as Agent. All of the defined terms in the Credit Agreement are incorporated herein by reference.

The Loan Parties are required by Section 6.12 of the Credit Agreement to cause each Subsidiary to become a “Guarantor”.

Accordingly, each Subsidiary hereby agrees as follows with the Agent, for the benefit of the Lenders:

1.Each Subsidiary hereby acknowledges, agrees and confirms that, by its execution of this Agreement, such Subsidiary will be deemed to be a party to the Credit Agreement and a “Guarantor” for all purposes of the Credit Agreement, and shall have all of the obligations of a Guarantor thereunder as if it had executed the Credit Agreement. Each Subsidiary hereby ratifies, as of the date hereof, and agrees to be bound by, all of the terms, provisions and conditions applicable to the Guarantors contained in the Credit Agreement. Without limiting the generality of the foregoing terms of this paragraph 1, each Subsidiary hereby jointly and severally together with the other Guarantors, guarantees to each Lender and the Agent, as provided in Article XI of the Credit Agreement, the prompt payment of the Obligations in full when due (whether at stated maturity, as a mandatory prepayment, by acceleration, a mandatory cash collateralization or otherwise) strictly in accordance with the terms thereof.

2.The address of each Subsidiary for purposes of all notices and other communications is 8755 W. Higgins Road, Chicago, Illinois 60631, Attention: Assistant Treasurer (Facsimile No. 847-512-0340).

3.Each Subsidiary hereby waives acceptance by the Agent and the Lenders of the guaranty by such Subsidiary under Article XI of the Credit Agreement upon the execution of this Agreement by such Subsidiary.

4.This Agreement may be executed in two or more counterparts, each of which shall constitute an original but all of which when taken together shall constitute one contract.

5.This Agreement shall be governed by and construed and interpreted in accordance with the laws of the State of New York.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, each Subsidiary has caused this Agreement to be duly executed by its authorized officers, and the Agent, for the benefit of the Lenders, has caused the same to be accepted by its authorized officer, as of the day and year first above written.

HARTLAND CONTROLS HOLDING CORP.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

HARTLAND CONTROLS L.L.C.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

Acknowledged and accepted:

BANK OF AMERICA, N.A.,

as Agent

By:/s/ Melissa Mullis

Name: Melissa Mullis

Title: Vice President

Schedule 1

TO JOINDER AGREEMENT

[Chief Executive Office, Tax Identification Number, Organization Identification Number

and Chief Place of Business of Subsidiary]

SUBSIDIARY	CHIEF EXECUTIVE OFFICE / CHIEF PLACE OF BUSINESS	ORGANIZATIONAL ID #	US TAXPAYER ID #
Hartland Controls Holding Corp.	8755 W. Higgins Road Chicago, Illinois 60631	5480320	46-4807998
Hartland Controls L.L.C.	8755 W. Higgins Road Chicago, Illinois 60631	0068517-8	04-3603896

EX-10.2

EXHIBIT 10.2

Subsidiary Guarantor Supplement

THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the “Subsidiary Guarantor Supplement”), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an “Additional Subsidiary Guarantor”), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below:

Preliminary Statements:

    I.    Pursuant to the Note Purchase Agreement dated as of December 8, 2016 (as amended, modified, supplemented or restated from time to time, the “Note Agreement”), by and among Littelfuse, Inc., a Delaware corporation (together with any successor thereto that becomes a party to the Note Agreement pursuant to Section 10.2, the “Company”) and the Persons listed on the signature pages thereto (the “Purchasers”), the Company has issued and sold (i) $25,000,000 aggregate principal amount of its 3.03% Senior Notes, Series A, due February 15, 2022 (the “Series A Notes”) and (ii) $100,000,000 aggregate principal amount of its 3.74% Senior Notes, Series B, due February 15, 2027 (the “Series B Notes” and together with the Series A Notes as amended, restated or otherwise modified from time to time and including any such notes issued in substitution therefor, the “Notes” and individually a “Note”).

    II.    The Company is required pursuant to the Note Agreement to cause each Additional Subsidiary Guarantor to deliver this Subsidiary Guarantor Supplement in order to cause each Additional Subsidiary Guarantor to become a Subsidiary Guarantor under the Subsidiary Guaranty Agreement dated as of February 15, 2017 executed by certain Subsidiaries of the Company (together with each entity that from time to time becomes a party thereto by executing a Subsidiary Guarantor Supplement pursuant to Section 14.1 thereof, collectively, the “Subsidiary Guarantors”) in favor of each holder from time to time of any of the Notes (as the same may be amended, restated, supplemented or otherwise modified from time to time, the “Subsidiary Guaranty Agreement”).

    III.    Each Additional Subsidiary Guarantor has received and will receive substantial direct and indirect benefits from the Company’s compliance with the terms and conditions of the Note Agreement and the Notes issued thereunder.

    IV.    Capitalized terms used and not otherwise defined herein have the definitions set forth in the Note Agreement.

Now therefore, in consideration of the funds advanced to the Company by the Purchasers under the Note Agreement and to enable the Company to comply with the terms of the Note Agreement, each Additional Subsidiary Guarantor hereby covenants, represents and warrants to the holders as follows:

The Additional Subsidiary Guarantor hereby becomes a Subsidiary Guarantor (as defined in the Subsidiary Guaranty Agreement) for all purposes of the Subsidiary Guaranty Agreement. Without limiting the foregoing, the Additional Subsidiary Guarantor hereby (a) jointly and severally with the other Subsidiary Guarantors under the Subsidiary Guaranty Agreement (including the other Additional Subsidiary Guarantors party to this Subsidiary Guarantor Supplement), guarantees to the holders from time to time of the Notes the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) and the full and prompt performance and observance of all Guaranteed Obligations (as defined in Section 1 of the Subsidiary Guaranty Agreement) in the same manner and to the same extent as is provided in the

Subsidiary Guaranty Agreement, (b) accepts and agrees to perform and observe all of the covenants set forth therein, (c) waives the rights set forth in Section 3 of the Subsidiary Guaranty Agreement, (d) agrees to perform and observe the covenants contained in Section 8 of the Subsidiary Guaranty Agreement, (e) makes the representations and warranties set forth in Section 9 of the Subsidiary Guaranty Agreement and (f) waives the rights, submits to jurisdiction, and waives service of process as described in Section 14.6 of the Subsidiary Guaranty Agreement.

Notice of acceptance of this Subsidiary Guarantor Supplement and of the Subsidiary Guaranty Agreement, as supplemented hereby, is hereby waived by the Additional Subsidiary Guarantor.

The address for notices and other communications to be delivered to the Additional Subsidiary Guarantor pursuant to Section 13 of the Subsidiary Guaranty Agreement is set forth on the signature page below.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, each Additional Subsidiary Guarantor has caused this Subsidiary Guarantor Supplement to be duly executed and delivered as of the date and year first above written.

HARTLAND CONTROLS HOLDING CORP.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

HARTLAND CONTROLS L.L.C.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

Notice Address for each Additional Subsidiary Guarantor:

c/o Littelfuse, Inc.

Attention: Legal Department

8755 W. Higgins Road, Suite 500 Chicago, IL 60631

EX-10.3

EXHIBIT 10.3

Subsidiary Guarantor Supplement

THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the “Subsidiary Guarantor Supplement”), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an “Additional Subsidiary Guarantor”), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below:

Preliminary Statements:

    I.    Pursuant to the Note Purchase Agreement dated as of December 8, 2016 (as amended, modified, supplemented or restated from time to time, the “Note Agreement”), by and among Littelfuse Netherland C.V., a limited partnership (commanditaire vennootschap) established under the laws of the Netherlands (together with any successor thereto that becomes a party to the Note Agreement pursuant to Section 10.2, the “Company”) and Littelfuse, Inc., a Delaware corporation (the “Parent Guarantor” and, together with the Company, the “Obligors”), and the Persons listed on the signature pages thereto (the “Purchasers”), the Obligors have issued and sold (i) €117,000,000 aggregate principal amount of its 1.14% Senior Notes, Series A, due December 8, 2023 (the “Series A Notes”) and (ii) €95,000,000 aggregate principal amount of its 1.83% Senior Notes, Series B, due December 8, 2028 (the “Series B Notes” and together with the Series A Notes as amended, restated or otherwise modified from time to time and including any such notes issued in substitution therefor, the “Notes” and individually a “Note”).

    II.    The Obligors are required pursuant to the Note Agreement to cause each Additional Subsidiary Guarantor to deliver this Subsidiary Guarantor Supplement in order to cause each Additional Subsidiary Guarantor to become a Subsidiary Guarantor under the Subsidiary Guaranty Agreement dated as of December 8, 2016 executed by certain Subsidiaries of the Obligors (together with each entity that from time to time becomes a party thereto by executing a Subsidiary Guarantor Supplement pursuant to Section 15.1 thereof, collectively, the “Subsidiary Guarantors”) in favor of each holder from time to time of any of the Notes (as the same may be amended, restated, supplemented or otherwise modified from time to time, the “Subsidiary Guaranty Agreement”).

    III.    Each Additional Subsidiary Guarantor has received and will receive substantial direct and indirect benefits from the Obligors’ compliance with the terms and conditions of the Note Agreement and the Notes issued thereunder.

    IV.    Capitalized terms used and not otherwise defined herein have the definitions set forth in the Note Agreement.

Now therefore, in consideration of the funds advanced to the Company by the Purchasers under the Note Agreement and to enable the Obligors to comply with the terms of the Note Agreement, each Additional Subsidiary Guarantor hereby covenants, represents and warrants to the holders as follows:

The Additional Subsidiary Guarantor hereby becomes a Subsidiary Guarantor (as defined in the Subsidiary Guaranty Agreement) for all purposes of the Subsidiary Guaranty Agreement. Without limiting the foregoing, the Additional Subsidiary Guarantor hereby (a) jointly and severally with the other Subsidiary Guarantors under the Subsidiary Guaranty Agreement (including the other Additional Subsidiary Guarantors party to this Subsidiary Guarantor Supplement), guarantees to the holders from time to time of the Notes the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) and the full and prompt

performance and observance of all Guaranteed Obligations (as defined in Section 1 of the Subsidiary Guaranty Agreement) in the same manner and to the same extent as is provided in the Subsidiary Guaranty Agreement, (b) accepts and agrees to perform and observe all of the covenants set forth therein, (c) waives the rights set forth in Section 3 of the Subsidiary Guaranty Agreement, (d) agrees to perform and observe the covenants contained in Section 8 of the Subsidiary Guaranty Agreement, (e) makes the representations and warranties set forth in Section 9 of the Subsidiary Guaranty Agreement and (f) waives the rights, submits to jurisdiction, and waives service of process as described in Section 15.6 of the Subsidiary Guaranty Agreement.

Notice of acceptance of this Subsidiary Guarantor Supplement and of the Subsidiary Guaranty Agreement, as supplemented hereby, is hereby waived by the Additional Subsidiary Guarantor.

The address for notices and other communications to be delivered to the Additional Subsidiary Guarantor pursuant to Section 14 of the Subsidiary Guaranty Agreement is set forth on the signature page below.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, each Additional Subsidiary Guarantor has caused this Subsidiary Guarantor Supplement to be duly executed and delivered as of the date and year first above written.

HARTLAND CONTROLS HOLDING CORP.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

HARTLAND CONTROLS L.L.C.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

Notice Address for each Additional Subsidiary Guarantor:

c/o Littelfuse, Inc.

Attention: Legal Department

8755 W. Higgins Road, Suite 500 Chicago, IL 60631

EX-10.4

EXHIBIT 10.4

SUBSIDIARY GUARANTOR SUPPLEMENT

THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the “Subsidiary Guarantor Supplement”), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an “Additional Subsidiary Guarantor”), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below:

PRELIMINARY STATEMENTS:

I.Pursuant to the Note Purchase Agreement dated as of November 15, 2017 (as amended, modified, supplemented or restated from time to time, the “Note Agreement”), by and among LITTELFUSE, INC., a Delaware corporation (together with any successor thereto that becomes a party to the Note Agreement pursuant to Section 10.2, the “Company”) and the Persons listed on the signature pages thereto (the “Purchasers”), the Company has issued and sold (i) $50,000,000 aggregate principal amount of its 3.48% Senior Notes, Series A, due February 15, 2025 (the “Series A Notes”) and (ii) $125,000,000 aggregate principal amount of its 3.78% Senior Notes, Series B, due February 15, 2030 (the “Series B Notes” and together with the Series A Notes as amended, restated or otherwise modified from time to time and including any such notes issued in substitution therefor, the “Notes” and individually a “Note”).

II.The Company is required pursuant to the Note Agreement to cause each Additional Subsidiary Guarantor to deliver this Subsidiary Guarantor Supplement in order to cause each Additional Subsidiary Guarantor to become a Subsidiary Guarantor under the Subsidiary Guaranty Agreement dated as of January 16, 2018 executed by certain Subsidiaries of the Company (together with each entity that from time to time becomes a party thereto by executing a Subsidiary Guarantor Supplement pursuant to Section 14.1 thereof, collectively, the “Subsidiary Guarantors”) in favor of each holder from time to time of any of the Notes (as the same may be amended, restated, supplemented or otherwise modified from time to time, the “Subsidiary Guaranty Agreement”).

III.Each Additional Subsidiary Guarantor has received and will receive substantial direct and indirect benefits from the Company’s compliance with the terms and conditions of the Note Agreement and the Notes issued thereunder.

IV.Capitalized terms used and not otherwise defined herein have the definitions set forth in the Note Agreement.

Now therefore, in consideration of the funds advanced to the Company by the Purchasers under the Note Agreement and to enable the Company to comply with the terms of the Note Agreement, each Additional Subsidiary Guarantor hereby covenants, represents and warrants to the holders as follows:

The Additional Subsidiary Guarantor hereby becomes a Subsidiary Guarantor (as defined in the Subsidiary Guaranty Agreement) for all purposes of the Subsidiary Guaranty Agreement. Without limiting the foregoing, the Additional Subsidiary Guarantor hereby (a) jointly and severally with the other Subsidiary Guarantors under the Subsidiary Guaranty Agreement (including the other Additional Subsidiary Guarantors party to this Subsidiary Guarantor Supplement), guarantees to the holders from time to time of the Notes the prompt payment in full when due (whether at stated maturity, by acceleration or otherwise) and the full and prompt performance and observance of all Guaranteed Obligations (as defined in Section 1 of the Subsidiary Guaranty Agreement) in the same manner and to the same extent as is provided in the Subsidiary Guaranty Agreement, (b) accepts and agrees to perform and observe all of the covenants set forth therein, (c) waives the rights set forth in Section 3 of the Subsidiary Guaranty Agreement, (d) agrees to perform and observe the covenants contained in Section 8 of the Subsidiary Guaranty Agreement, (e) makes the representations and warranties set forth in Section 9 of the Subsidiary Guaranty Agreement and (f) waives the rights, submits to jurisdiction, and waives service of process as described in Section 14.6 of the Subsidiary Guaranty Agreement.

Notice of acceptance of this Subsidiary Guarantor Supplement and of the Subsidiary Guaranty Agreement, as supplemented hereby, is hereby waived by the Additional Subsidiary Guarantor.

The address for notices and other communications to be delivered to the Additional Subsidiary Guarantor pursuant to Section 13 of the Subsidiary Guaranty Agreement is set forth on the signature page below.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

IN WITNESS WHEREOF, each Additional Subsidiary Guarantor has caused this Subsidiary Guarantor Supplement to be duly executed and delivered as of the date and year first above written.

HARTLAND CONTROLS HOLDING CORP.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

HARTLAND CONTROLS L.L.C.

By: /s/ Carlos Ramirez

Name: Carlos Ramirez

Title: Assistant Treasurer

Notice Address for each Additional Subsidiary Guarantor:

c/o Littelfuse, Inc.

Attention: Legal Department

8755 W. Higgins Road, Suite 500 Chicago, IL 60631

EX-31.1

EXHIBIT 31.1

SECTION 302 CERTIFICATION

I, David W. Heinzmann, certify that:

1I have reviewed this Quarterly Report on Form 10-Q of Littelfuse Inc.;

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

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

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

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

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

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

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

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

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

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

Dated: April 28, 2021
	/s/ David W. Heinzmann
	David W. Heinzmann President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

SECTION 302 CERTIFICATION

I, Meenal A. Sethna, certify that:

1I have reviewed this Quarterly Report on Form 10-Q of Littelfuse Inc.;

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

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

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

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

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

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

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

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

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

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

Dated: April 28, 2021
	/s/ Meenal A. Sethna
	Meenal A. Sethna Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

LITTELFUSE, INC.

Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of title 18, United States Code), each of the undersigned officers of Littelfuse, Inc. (“the Company”) does hereby certify that to his knowledge:

The Quarterly Report of the Company on Form 10-Q for the fiscal quarter ended March 27, 2021 (“the Report”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ David W. Heinzmann	/s/ Meenal A. Sethna
David W. Heinzmann	Meenal A. Sethna
President and Chief Executive Officer	Executive Vice President and Chief Financial Officer
Dated: April 28, 2021	Dated: April 28, 2021

XML

Cover Page - shares	3 Months Ended
	Mar. 27, 2021	Apr. 23, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 27, 2021
Document Transition Report	false
Entity File Number	0-20388
Entity Registrant Name	LITTELFUSE INC /DE
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3795742
Entity Address, Address Line One	8755 West Higgins Road
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60631
City Area Code	773
Local Phone Number	628-1000
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	LFUS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,555,229
Entity Central Index Key	0000889331
Current Fiscal Year End Date	--12-26
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Current assets:
Cash and cash equivalents	$ 572,771	$ 687,525
Short-term investments	53	54
Trade receivables, less allowances of $42,624 and $45,237 at March 27, 2021 and December 26, 2020, respectively	276,687	232,760
Inventories	295,057	258,002
Prepaid income taxes and income taxes receivable	4,146	3,029
Prepaid expenses and other current assets	43,698	35,939
Total current assets	1,192,412	1,217,309
Net property, plant, and equipment	344,914	344,178
Intangible assets, net of amortization	317,294	291,887
Goodwill	845,586	816,812
Investments	37,285	30,547
Deferred income taxes	9,854	11,224
Right of use lease assets, net	19,560	17,615
Other assets	19,965	18,021
Total assets	2,786,870	2,747,593
Current liabilities:
Accounts payable	179,723	145,984
Accrued liabilities	98,354	110,478
Accrued income taxes	23,468	19,186
Current portion of long-term debt	25,000	0
Total current liabilities	326,545	275,648
Long-term debt, less current portion	623,865	687,034
Deferred income taxes	51,229	50,134
Accrued post-retirement benefits	42,894	45,802
Non-current operating lease liabilities	14,190	12,950
Other long-term liabilities	67,410	67,252
Shareholders’ equity:
Common stock, par value $0.01 per share: 34,000,000 shares authorized; shares issued, March 27, 2021–26,196,472; December 26, 2020–26,131,544	259	259
Additional paid-in capital	918,762	907,858
Treasury stock, at cost: 1,644,283 and 1,644,283 shares, respectively	(242,366)	(242,366)
Accumulated other comprehensive loss	(96,028)	(91,157)
Retained earnings	1,079,979	1,034,048
Littelfuse, Inc. shareholders’ equity	1,660,606	1,608,642
Non-controlling interest	131	131
Total equity	1,660,737	1,608,773
Total liabilities and equity	$ 2,786,870	$ 2,747,593

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Statement of Financial Position [Abstract]
Allowance for trade receivables	$ 42,624	$ 45,237
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	34,000,000	34,000,000
Common stock issued (in shares)	26,196,472	26,131,544
Treasury stock (in shares)	1,644,283	1,644,283

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CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Income Statement [Abstract]
Net sales	$ 463,794	$ 346,096
Cost of sales	303,328	221,740
Gross profit	160,466	124,356
Selling, general, and administrative expenses	58,288	51,200
Research and development expenses	14,739	14,463
Amortization of intangibles	10,521	9,981
Restructuring, impairment, and other charges	437	3,962
Total operating expenses	83,985	79,606
Operating income	76,481	44,750
Interest expense	4,673	5,418
Foreign exchange loss	6,837	2,584
Other (income) expense, net	(7,737)	1,249
Income before income taxes	72,708	35,499
Income taxes	14,995	10,855
Net income	$ 57,713	$ 24,644
Earnings per share:
Basic (in dollars per share)	$ 2.35	$ 1.01
Diluted (in dollars per share)	$ 2.32	$ 1.00
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	24,532	24,393
Diluted (in shares)	24,892	24,578

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 57,713	$ 24,644
Other comprehensive income (loss):
Pension and postemployment adjustment, net of tax	454	561
Foreign currency translation adjustments	(5,325)	(15,540)
Comprehensive income	$ 52,842	$ 9,665

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
OPERATING ACTIVITIES
Net income	$ 57,713	$ 24,644
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	13,677	13,821
Amortization of intangibles	10,521	9,981
Deferred revenue	(157)	(145)
Non-cash inventory charges	3,489	0
Impairment charges	0	2,237
Stock-based compensation	3,395	2,965
(Gain) loss on investments and other assets	(7,675)	2,604
Deferred income taxes	378	616
Other	8,537	3,547
Changes in operating assets and liabilities:
Trade receivables	(32,973)	(9,457)
Inventories	(6,152)	6,667
Accounts payable	17,070	(3,964)
Accrued liabilities and income taxes	(15,427)	(7,012)
Prepaid expenses and other assets	(2,230)	(1,225)
Net cash provided by operating activities	50,166	45,279
INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(109,852)	0
Purchases of property, plant, and equipment	(14,721)	(16,586)
Net proceeds from sale of property, plant and equipment	2,553	50
Net cash used in investing activities	(122,020)	(16,536)
FINANCING ACTIVITIES
Proceeds of revolving credit facility	0	100,000
Payments of revolving credit facility	(30,000)	0
Payments of term loan	0	(2,500)
Net proceeds related to stock-based award activities	7,509	2,956
Purchases of common stock	0	(22,927)
Cash dividends paid	(11,782)	(11,725)
Net cash (used in) provided by financing activities	(34,273)	65,804
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(4,101)	(5,111)
(Decrease) increase in cash, cash equivalents, and restricted cash	(110,228)	89,436
Cash, cash equivalents, and restricted cash at beginning of period	687,525	531,139
Cash, cash equivalents, and restricted cash at end of period	577,297	620,575
Supplementary Cash Flow Information
Cash and cash equivalents	572,771	620,575
Restricted cash included in prepaid expenses and other current assets	3,462	0
Restricted cash included in other assets	1,064	0
Cash paid during the period for interest	6,235	7,354
Capital expenditures, not yet paid	$ 4,141	$ 5,832

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Addl. Paid in Capital	Treasury Stock	Accum. Other Comp. (Loss)	Retained Earnings	Non-controlling Interest
Balance at Dec. 28, 2019	$ 1,496,014	$ 256	$ 867,996	$ (216,447)	$ (106,823)	$ 950,901	$ 131
Increase (Decrease) in Stockholders' Equity
Net income	24,644					24,644
Total change in other comprehensive income (loss)	(14,979)				(14,979)
Stock-based compensation	2,965		2,965
Withheld shares on restricted share units for withholding taxes	(443)			(443)
Stock options exercised	3,399		3,399
Repurchases of common stock	(22,927)			(22,927)
Cash dividends paid	(11,725)					(11,725)
Balance at Mar. 28, 2020	1,476,948	256	874,360	(239,817)	(121,802)	963,820	131
Balance at Dec. 26, 2020	1,608,773	259	907,858	(242,366)	(91,157)	1,034,048	131
Increase (Decrease) in Stockholders' Equity
Net income	57,713					57,713
Total change in other comprehensive income (loss)	(4,871)				(4,871)
Stock-based compensation	3,395		3,395
Stock options exercised	7,509	0	7,509
Cash dividends paid	(11,782)					(11,782)
Balance at Mar. 27, 2021	$ 1,660,737	$ 259	$ 918,762	$ (242,366)	$ (96,028)	$ 1,079,979	$ 131

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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parentheticals) - $ / shares	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends paid, per share (in dollars per share)	$ 0.48	$ 0.48

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Summary of Significant Accounting Policies and Other Information

3 Months Ended

Mar. 27, 2021

Accounting Policies [Abstract]

Summary of Significant Accounting Policies and Other Information

Summary of Significant Accounting Policies and Other Information

Nature of Operations 

Founded in 1927, Littelfuse is an industrial technology manufacturing company empowering a sustainable, connected, and safer world. Across more than 15 countries, and with 12,000 global associates, we partner with customers to design and deliver innovative, reliable solutions. Serving over 100,000 end customers, our products are found in a variety of industrial, transportation and electronics end markets – everywhere, every day.

Basis of Presentation 

The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net income and comprehensive income, statements of cash flows, and statement of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 26, 2020 which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results.

Revenue Recognition

Revenue Disaggregation

The following tables disaggregate the Company’s revenue by primary business units for the three months ended March 27, 2021 and March 28, 2020:

	Three Months Ended March 27, 2021
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	132,437	$	—	$	—	$	132,437
Electronics – Semiconductor	154,098		—		—		154,098
Passenger Car Products	—		67,901		—		67,901
Automotive Sensors	—		28,284		—		28,284
Commercial Vehicle Products	—		32,344		—		32,344
Industrial Products	—		—		48,730		48,730
Total	$	286,535	$	128,529	$	48,730	$	463,794

	Three Months Ended March 28, 2020
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	84,598	$	—	$	—	$	84,598
Electronics – Semiconductor	129,591		—		—		129,591
Passenger Car Products	—		52,645		—		52,645
Automotive Sensors	—		24,174		—		24,174
Commercial Vehicle Products	—		27,951		—		27,951
Industrial Products	—		—		27,137		27,137
Total	$	214,189	$	104,770	$	27,137	$	346,096

See Note 15, Segment Information for net sales by segment and countries.

Revenue Recognition

The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowance, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors.

The Company elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year.

Revenue and Billing

The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue.

Ship and Debit Program

Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributor to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historic activity, electronic distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue.

Return to Stock 

The Company has a return to stock policy whereby certain customers, with prior authorization from Littelfuse management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historic activity. Sales revenue and cost of sales are reduced to anticipate estimated returns.

Volume Rebates

The Company offers volume based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold.

Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash at March 27, 2021 and December 26, 2020 reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows.

(in thousands)	March 27, 2021		December 26, 2020
Cash and cash equivalents	$	572,771	$	687,525
Restricted cash included in prepaid expenses and other current assets	3,462		—
Restricted cash included in other assets	1,064		$	—
Total cash, cash equivalents and restricted cash	$	577,297	$	687,525

Recently Adopted Accounting Standards

In December 2019, the Financial Accounting Standards Board (FASB) issued ASU No. 2019-12, "Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes" as part of its initiative to reduce complexity in the accounting standards. The guidance is effective for fiscal years beginning after December 15, 2020 with early adoption permitted. The adoption of ASU 2019-12 did not have a material impact on our Condensed Consolidated Financial Statements.

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Acquisitions

3 Months Ended

Mar. 27, 2021

Business Combinations [Abstract]

Acquisitions

Acquisitions

The Company accounts for acquisitions using the acquisition method in accordance with ASC 805, “Business Combinations,” in which assets acquired and liabilities assumed are recorded at fair value as of the date of acquisition. The operating results of the acquired business are included in the Company’s Consolidated Financial Statements from the date of the acquisition.

Hartland Controls

On January 28, 2021, the Company acquired Hartland Controls ("Hartland"), a manufacturer and leading supplier of electrical components used primarily in heating, ventilation, air conditioning (HVAC) and other industrial and control systems applications with annualized sales of approximately $70 million. The purchase price for Hartland was approximately $112.3 million and the operations of Hartland are included in the Industrial segment.

The total purchase consideration of $109.9 million, net of cash, cash equivalents, and restricted cash has been allocated, on a preliminary basis, to assets acquired and liabilities assumed, as of the completion of the acquisition, based on preliminary estimated fair values. The purchase consideration is subject to change for the final working capital adjustments. As of March 27, 2021, the Company had restricted cash of $1.7 million in an escrow account for general indemnification purposes. The purchase price allocation is preliminary because the evaluations necessary to assess the fair values of the net assets acquired are still in process. The primary areas that are not yet finalized relate to the completion of the valuations of certain acquired income tax assets and liabilities. As a result, these allocations are subject to change during the purchase price allocation period as the valuations are finalized.

The following table summarizes the purchase price allocation of the fair value of assets acquired and liabilities assumed in the Hartland acquisition:

(in thousands)	Purchase Price Allocation
Total purchase consideration:
Cash, net of cash acquired, and restricted cash	$	109,852
Allocation of consideration to assets acquired and liabilities assumed:
Trade receivables, net	14,305
Inventories	36,306
Other current assets	2,384
Property, plant, and equipment	6,296
Intangible assets	39,660
Goodwill	38,929
Other non-current assets	3,542
Current liabilities	(25,024)
Other non-current liabilities	(6,546)
	$	109,852

All Hartland goodwill, other assets and liabilities were recorded in the Industrial segment and are primarily reflected in the Americas and Asia-Pacific geographic areas. The goodwill resulting from this acquisition consists largely of the Company’s expected future product sales and synergies from combining Hartland’s products and technology with the Company’s existing industrial products portfolio. Goodwill resulting from the Hartland acquisition is not expected to be deductible for tax purposes.

Included in the Company’s Condensed Consolidated Statements of Net Income for the three months ended March 27, 2021 are net sales of approximately $16.7 million, and a loss before income taxes of $2.2 million, since the January 28, 2021 acquisition of Hartland.

The Company recorded a $6.8 million step-up of inventory to its fair value as of the acquisition date based on the preliminary valuation. The step-up is being amortized as a non-cash charge to cost of goods sold during the first and second quarters of 2021, as the acquired inventory is sold, and reflected as other non-segment costs. During the three months ended March 27, 2021, the Company recognized a charge of $3.5 million for the amortization of this fair value inventory step-up.

During the three months ended March 27, 2021, the Company incurred approximately $0.7 million of legal and professional fees related to this acquisition recognized as Selling, general, and administrative expenses. These costs were reflected as other non-segment costs.

Pro Forma Results

The following table summarizes, on an unaudited pro forma basis, the combined results of operations of the Company and Hartland as though the acquisition had occurred as of December 29, 2019. The pro forma amounts presented are not necessarily indicative of either the actual consolidated results had the Hartland acquisition occurred as of December 29, 2019 or of future consolidated operating results.

	For the Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Net sales	$	470,832	$	363,617
Income before income taxes	77,288		31,431
Net income	61,317		21,438
Net income per share — basic	2.50		0.88
Net income per share — diluted	2.46		0.87

Pro forma results presented above primarily reflect the following adjustments:

	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Amortization(a)	$	(279)	$	(834)
Depreciation	7		48
Transaction costs(b)	707		(707)
Amortization of inventory step-up(c)	3,490		(5,137)
Income tax (expense) benefit of above items	(831)		1,398

(a)The amortization adjustment for the three months ended March 28, 2020 primarily reflects incremental amortization resulting for the measurement of intangibles at their fair values.

(b)The transaction cost adjustments reflect the reversal of certain bank and attorney fees from the three months ended March 27, 2021 and recognition of those fees during the three months ended March 28, 2020.

(c)The amortization of inventory step-up adjustment reflects the reversal of the amount recognized during the three months ended March 27, 2021 and the recognition of a full quarter of the amortization during the three months ended March 28, 2020. The inventory step-up was amortized over four months as the inventory was sold.

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Inventories

3 Months Ended

Mar. 27, 2021

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Raw materials	$	97,695	$	85,394
Work in process	102,285		92,783
Finished goods	130,138		114,641
Inventory Reserves	(35,061)		(34,816)
Total	$	295,057	$	258,002

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Property, Plant, and Equipment

3 Months Ended

Mar. 27, 2021

Property, Plant and Equipment [Abstract]

Property, Plant, and Equipment

Property, Plant, and Equipment

The components of net property, plant, and equipment at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Land	$	22,711	$	22,851
Building	124,192		123,497
Equipment	687,563		678,220
Accumulated depreciation and amortization	(489,552)		(480,390)
Total	$	344,914	$	344,178

The Company recorded depreciation expense of $13.7 million and $13.8 million for the three months ended March 27, 2021 and March 28, 2020, respectively.

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 27, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

The amounts for goodwill and changes in the carrying value by segment for the three months ended March 27, 2021 are as follows:

(in thousands)	Electronics		Automotive		Industrial		Total
Net book value of goodwill as of December 26, 2020
Gross goodwill as of December 26, 2020	$	676,325	$	138,354	$	47,551	$	862,230
Accumulated impairment losses as of December 26, 2020	—		(36,423)		(8,995)		(45,418)
Total	676,325		101,931		38,556		816,812
Changes during 2021:
Additions(a)	—		—		38,929		38,929
Currency translation	(8,124)		(2,012)		(19)		(10,155)
Net book value of goodwill as of March 27, 2021
Gross goodwill as of March 27, 2021	668,201		136,229		86,461		890,891
Accumulated impairment losses as of March 27, 2021	—		(36,310)		(8,995)		(45,305)
Total	$	668,201	$	99,919	$	77,466	$	845,586

(a) The additions resulted from the acquisition of Hartland.

The components of other intangible assets as of March 27, 2021 and December 26, 2020 are as follows:

	As of March 27, 2021
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,251	$	2,051	$	8,200
Patents, licenses and software	142,732		94,636		48,096
Distribution network	43,704		39,307		4,397
Customer relationships, trademarks, and tradenames	400,253		143,652		256,601
Total	$	596,940	$	279,646	$	317,294

	As of December 26, 2020
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,280	$	2,007	$	8,273
Patents, licenses and software	137,210		92,868		44,342
Distribution network	43,910		38,980		4,930
Customer relationships, trademarks, and tradenames	372,064		137,722		234,342
Total	$	563,464	$	271,577	$	291,887

During the three months ended March 27, 2021 and March 28, 2020, the Company recorded amortization expense of $10.5 million and $10.0 million, respectively.

The Company recognized a $0.3 million non-cash impairment charge in the first quarter of 2020 on a certain patent triggered by the Company’s announcement to consolidate a manufacturing facility within the Industrial segment.

During the three months ended March 27, 2021, the Company recorded additions to intangible assets of $39.7 million, related to the Hartland acquisition, the components of which were as follows:

(in thousands)	Weighted Average Useful Life	Amount
Patents, licenses and software	9.2	$	7,559
Customer relationships, trademarks, and tradenames	13.7	32,101
Total		$	39,660

Estimated annual amortization expense related to intangible assets with definite lives as of March 27, 2021 is as follows:

(in thousands)	Amount
2021	$	41,545
2022	40,791
2023	36,491
2024	33,054
2025	32,603
2026 and thereafter	143,331
Total	$	327,815

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Accrued Liabilities

3 Months Ended

Mar. 27, 2021

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities

The components of accrued liabilities as of March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Employee-related liabilities	$	45,135	$	50,689
Operating lease liability	7,177		6,811
Interest	2,636		4,517
Restructuring liability	2,588		4,195
Customer liability	794		3,858
Professional services	3,010		3,321
Deferred revenue	2,713		2,959
Other non-income taxes	1,903		2,126
Other	32,398		32,002
Total	$	98,354	$	110,478

Employee-related liabilities consist primarily of payroll, sales commissions, bonus, employee benefit accruals and workers’ compensation. Bonus accruals include amounts earned pursuant to the Company’s primary employee incentive compensation plans. Other accrued liabilities include miscellaneous operating accruals and other client-related liabilities.

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Restructuring, Impairment and Other Charges

3 Months Ended

Mar. 27, 2021

Restructuring and Related Activities [Abstract]

Restructuring, Impairment and Other Charges

Restructuring, Impairment and Other Charges

The Company recorded restructuring, impairment and other charges for the three months ended March 27, 2021 and March 28, 2020 as follows:

	Three months ended March 27, 2021
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	257	$	—	$	163	$	420
Other restructuring charges	—		17		—		17
Total restructuring charges	257		17		163		437
Impairment	—		—		—		—
Total	$	257	$	17	$	163	$	437

	Three months ended March 28, 2020
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	881	$	399	$	321	$	1,601
Other restructuring charges	1		120		3		124
Total restructuring charges	882		519		324		1,725
Impairment	—		—		2,237		2,237
Total	$	882	$	519	$	2,561	$	3,962

2021

For the three months ended March 27, 2021, the Company recorded total restructuring charges of $0.4 million, primarily for employee termination costs. These charges primarily related to the reorganization of certain manufacturing, selling and administrative functions within the Electronics and Industrial segments.

2020

For the three months ended March 28, 2020, the Company recorded total restructuring charges of $1.7 million, for employee termination costs and other restructuring charges. These charges primarily related to the reorganization of certain manufacturing, selling and administrative functions across all segments and the announced consolidation of a manufacturing facility within the Industrial segment. The Company also recognized $2.2 million of impairment charges related to the land and building associated with the Company’s announcement to consolidate a manufacturing facility within the Industrial segment.

The restructuring liability as of March 27, 2021 and December 26, 2020 is $2.6 million and $4.2 million, respectively. The restructuring liability is included within accrued liabilities in the Condensed Consolidated Balance Sheets. The Company anticipates the remaining payments associated with employee terminations will primarily be completed by the first quarter of 2022.

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Debt

3 Months Ended

Mar. 27, 2021

Debt Disclosure [Abstract]

Debt

Debt

The carrying amounts of debt at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Revolving Credit Facility	$	100,000	$	130,000
Euro Senior Notes, Series A due 2023	138,039		142,679
Euro Senior Notes, Series B due 2028	112,083		115,850
U.S. Senior Notes, Series A due 2022	25,000		25,000
U.S. Senior Notes, Series B due 2027	100,000		100,000
U.S. Senior Notes, Series A due 2025	50,000		50,000
U.S. Senior Notes, Series B due 2030	125,000		125,000
Other	2,619		2,619
Unamortized debt issuance costs	(3,876)		(4,114)
Total debt	648,865		687,034
Less: Current maturities	(25,000)		—
Total long-term debt	$	623,865	$	687,034

Revolving Credit Facility

On April 3, 2020, the Company amended its Credit Agreement to effect certain changes, including, among others: (i) eliminating the $200.0 million unsecured term loan credit facility, the remaining outstanding balance ($140.0 million) of which was repaid in full on April 3, 2020 through the revolving credit facility; (ii) making certain financial and non-financial covenants less restrictive on the Company; (iii) modifying performance-based interest rate margins and undrawn fees; and (iv) extending the maturity date to April 3, 2025. The amended Credit Agreement also allows the Company to increase the size of the revolving credit facility or enter into one or more tranches of term loans if there is no event of default and the Company is in compliance with certain financial covenants. The Company made payments of $30.0 million on the amended revolving credit facility during the three months ended March 27, 2021. The balance under the facility was $100.0 million as of March 27, 2021.

Outstanding borrowings under the amended Credit Agreement bears interest, at the Company’s option, at either LIBOR, fixed for interest periods of one, two, three or six-month periods, plus 1.25% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.25% to 1.00%, based upon the Company’s Consolidated Leverage Ratio, as defined. The Company was also required to pay commitment fees on unused portions of the credit agreement ranging from 0.125% to 0.20%, based on the Consolidated Leverage Ratio, as defined in the agreement. The amended Credit Agreement included representations, covenants and events of default that are customary for financing transactions of this nature. The effective interest rate on outstanding borrowings under the credit facility was 1.61% at March 27, 2021.

As of March 27, 2021, the Company had no amount outstanding in letters of credit and had available $571.3 million of borrowing capacity under the Revolving Credit Facility based on financial covenants. At March 27, 2021, the Company was in compliance with all covenants under the Credit Agreement.

Senior Notes

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold €212 million aggregate principal amount of senior notes in two series. The funding date for the Euro denominated senior notes occurred on December 8, 2016 for €117 million in aggregate amount of 1.14% Senior Notes, Series A, due December 8, 2023 (“Euro Senior Notes, Series A due 2023”), and €95 million in aggregate amount of 1.83% Senior Notes, Series B due December 8, 2028 (“Euro Senior Notes, Series B due 2028”) (together, the “Euro Senior Notes”). Interest on the Euro Senior Notes is payable semiannually on June 8 and December 8, commencing June 8, 2017.

On December 8, 2016, the Company entered into a Note Purchase Agreement, pursuant to which the Company issued and sold $125 million aggregate principal amount of senior notes in two series. On February 15, 2017, $25 million in aggregate principal amount of 3.03% Senior Notes, Series A, due February 15, 2022 (“U.S. Senior Notes, Series A due 2022”), and $100 million in aggregate principal amount of 3.74% Senior Notes, Series B, due February 15, 2027 (“U.S. Senior Notes, Series B due 2027”)

(together, the “U.S. Senior Notes due 2022 and 2027”) were funded. Interest on the U.S. Senior Notes due 2022 and 2027 is payable semiannually on February 15 and August 15, commencing August 15, 2017.

On November 15, 2017, the Company entered into a Note Purchase Agreement pursuant to which the Company issued and sold $175 million in aggregate principal amount of senior notes in two series. On January 16, 2018, $50 million aggregate principal amount of 3.48% Senior Notes, Series A, due February 15, 2025 (“U.S. Senior Notes, Series A due 2025”) and $125 million in aggregate principal amount of 3.78% Senior Notes, Series B, due February 15, 2030 (“U.S. Senior Notes, Series B due 2030”) (together the “U.S. Senior Notes due 2025 and 2030” and with the Euro Senior Notes and the U.S. Senior Notes due 2022 and 2027, the “Senior Notes”) were funded. Interest on the U.S. Senior Notes due 2025 and 2030 is payable semiannually on February 15 and August 15, commencing on August 15, 2018.

The Senior Notes have not been registered under the Securities Act, or applicable state securities laws. The Senior Notes are general unsecured senior obligations and rank equal in right of payment with all existing and future unsecured unsubordinated indebtedness of the Company.

The Senior Notes are subject to certain customary covenants, including limitations on the Company’s ability, with certain exceptions, to engage in mergers, consolidations, asset sales and transactions with affiliates, to engage in any business that would substantially change the general business of the Company, and to incur liens. In addition, the Company is required to satisfy certain financial covenants and tests relating to, among other matters, interest coverage and leverage. At March 27, 2021, the Company was in compliance with all covenants under the Senior Notes.

The Company may redeem the Senior Notes upon the satisfaction of certain conditions and the payment of a make-whole amount to noteholders and are required to offer to repurchase the Senior Notes at par following certain events, including a change of control.

Interest paid on all Company debt was $6.2 million and $7.4 million for the three months ended March 27, 2021 and March 28, 2020, respectively.

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Fair Value of Assets and Liabilities

3 Months Ended

Mar. 27, 2021

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities

Fair Value of Assets and Liabilities

For assets and liabilities measured at fair value on a recurring and nonrecurring basis, a three-level hierarchy of measurements based upon observable and unobservable inputs is used to arrive at fair value. Observable inputs are developed based on market data obtained from independent sources, while unobservable inputs reflect the Company’s assumptions about valuation based on the best information available in the circumstances. Depending on the inputs, the Company classifies each fair value measurement as follows:

Level 1—Valuations based on unadjusted quoted prices for identical assets or liabilities in active markets;

Level 2—Valuations based upon quoted prices for similar instruments, prices for identical or similar instruments in markets that are not active, or model-derived valuations, all of whose significant inputs are observable, and

Level 3—Valuations based upon one or more significant unobservable inputs.

Following is a description of the valuation methodologies used for instruments measured at fair value and their classification in the valuation hierarchy.

Cash Equivalents

Cash equivalents primarily consist of money market funds, which are held with an institution with sound credit rating and are highly liquid. The Company classified cash equivalents as Level 1 and are valued at cost which approximates fair value.

Investments in Equity Securities

Investments in equity securities listed on a national market or exchange are valued at the last sales price and classified within Level 1 of the valuation hierarchy and recorded in investments and other assets.

Other Investments

The Company has certain convertible debt and convertible preferred stock investments that are accounted for under the cost method reflected in other assets in the Condensed Consolidated Balance Sheets. As of March 27, 2021 and December 26, 2020, the balances of these investments were both $0.5 million. The fair value of these investments are measured on a nonrecurring basis using Level 3 inputs under the fair value hierarchy. The Company's accounting and finance management determines the valuation policies and procedures for Level 3 fair value measurements and is responsible for the development and determination of unobservable inputs.

Mutual Funds

The Company has a non-qualified Supplemental Retirement and Savings Plan which provides additional retirement benefits for certain management employees and named executive officers by allowing participants to defer a portion of their annual compensation. The Company maintains accounts for participants through which participants make investment elections. The marketable securities are classified as Level 1 under the fair value hierarchy as they are maintained in mutual funds with readily determinable fair value and recorded in other assets.

There were no changes during the quarter ended March 27, 2021 to the Company’s valuation techniques used to measure asset and liability fair values on a recurring basis. As of March 27, 2021 and December 26, 2020, the Company did not hold any non-financial assets or liabilities that are required to be measured at fair value on a recurring basis.

The following table presents assets measured at fair value by classification within the fair value hierarchy as of March 27, 2021:

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	66,565	$	—	$	—	$	66,565
Investments in equity securities	25,830		—		—		25,830
Mutual funds	13,397		—		—		13,397
Total	$	105,792	$	—	$	—	$	105,792

The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 26, 2020: 

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	73,461	$	—	$	—	$	73,461
Investments in equity securities	19,186		—		—		19,186
Mutual funds	13,249		—		—		13,249
Total	$	105,896	$	—	$	—	$	105,896

In addition to the methods and assumptions used for the financial instruments recorded at fair value as discussed above, the following methods and assumptions are used to estimate the fair value of other financial instruments that are not marked to market on a recurring basis. The Company’s other financial instruments include cash and cash equivalents, short-term investments, accounts receivable and its long-term debt. Due to their short-term maturity, the carrying amounts of cash and cash equivalents, short-term investments and accounts receivable approximate their fair values. The Company’s revolving credit facilities’ fair values approximate book value at March 27, 2021 and December 26, 2020, as the rates on these borrowings are variable in nature.

The carrying value and estimated fair values of the Company’s Euro Senior Notes, Series A and Series B and USD Senior Notes, Series A and Series B, as of March 27, 2021 and December 26, 2020 were as follows:

	March 27, 2021				December 26, 2020
(in thousands)	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Euro Senior Notes, Series A due 2023	$	138,039	$	140,084	$	142,679	$	144,323
Euro Senior Notes, Series B due 2028	112,083		117,703		115,850		123,588
USD Senior Notes, Series A due 2022	25,000		25,375		25,000		25,437
USD Senior Notes, Series B due 2027	100,000		106,174		100,000		109,552
USD Senior Notes, Series A due 2025	50,000		52,817		50,000		53,474
USD Senior Notes, Series B due 2030	125,000		130,764		125,000		138,036

The Company recognized impairment charges of $1.9 million for the land and building and $0.3 million for a certain patent as a result of the Company’s announcement to consolidate a manufacturing facility within the Industrial segment during the first quarter of 2020. See Note 7, Restructuring, Impairment and Other Charges, for further discussion. The fair value of the land and building was valued using a real estate appraisal and classified as a Level 3 input under the fair value hierarchy.

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Benefit Plans

3 Months Ended

Mar. 27, 2021

Retirement Benefits [Abstract]

Benefit Plans

Benefit Plans

The Company has company-sponsored defined benefit pension plans covering employees in the U.K., Germany, the Philippines, China, Japan, Mexico, Italy and France. The amount of the retirement benefits provided under the plans is based on years of service and final average pay.

The Company recognizes interest cost, expected return on plan assets, and amortization of prior service, net within Other (income) expense, net in the Condensed Consolidated Statements of Net Income. The components of net periodic benefit cost for the three months ended March 27, 2021 and March 28, 2020 were as follows: 

	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Components of net periodic benefit cost:
Service cost	$	702	$	618
Interest cost	440		658
Expected return on plan assets	(367)		(727)
Amortization of prior service and net actuarial loss	331		145
Net periodic benefit cost	$	1,106	$	694

The Company expects to make approximately $2.2 million of contributions to the plans and pay $3.8 million of benefits directly in 2021.

The Company also sponsors certain post-employment plans in foreign countries and other statutory benefit plans. The Company recorded expense of $0.5 million for both the three months ended March 27, 2021 and March 28, 2020, respectively, in Cost of Sales and Other (income) expense, net within the Condensed Consolidated Statements of Net Income. For the three months ended March 27, 2021 and March 28, 2020, the pre-tax amounts recognized in other comprehensive income (loss) as components of net periodic benefit costs for these plans were both $0.2 million.

On April 7, 2020, the Company entered into a definitive agreement to purchase a group annuity contract, under which an insurance company will be required to directly pay and administer pension payments to certain of the Company’s U.K. pension plan participants, or their designated beneficiaries. The purchase of this group annuity contract will reduce the Company’s outstanding pension benefit obligation by approximately $55 million, representing approximately 37% of the total obligations of the Company’s qualified pension plans, and will be funded with pension plan assets and additional cash on hand. In connection with this transaction, the Company will record a one-time non-cash settlement charge currently estimated between $18 million and $22 million in the fourth quarter of 2021, reflecting the accelerated recognition of unamortized actuarial losses

in the plan. The actual amount and timing of the settlement charge could differ from this estimate due to final data and plan wind-up expenses. Due to the signing of the group annuity contract being a significant change in the U.K. pension plan, the liabilities of the plan were remeasured as of April 6, 2020 resulting in an increase of $13.4 million (£10.9 million) to both the net pension liability and unamortized actuarial loss within other comprehensive income (loss) during the second quarter of 2020. Additionally, the Company made a cash contribution of $10.4 million (£8.4 million) under this agreement during the second quarter of 2020.

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Other Comprehensive Income

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Other Comprehensive Income

Other Comprehensive Income

Changes in other comprehensive income (loss) by component were as follows:

(in thousands)	Three Months Ended March 27, 2021						Three Months Ended March 28, 2020
	Pre-tax		Tax		Net of Tax		Pre-tax		Tax		Net of Tax
Defined benefit pension plan and other adjustments	$	506	$	52	$	454	$	555	$	(6)	$	561
Foreign currency translation adjustments	(5,325)		—		(5,325)		(15,540)		—		(15,540)
Total change in other comprehensive income (loss)	$	(4,819)	$	52	$	(4,871)	$	(14,985)	$	(6)	$	(14,979)

The following tables set forth the changes in accumulated other comprehensive (loss) by component for the three months ended March 27, 2021 and March 28, 2020:

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 26, 2020	$	(34,141)	$	(57,016)	$	(91,157)
Activity in the period	454		(5,325)		(4,871)
Balance at March 27, 2021	$	(33,687)	$	(62,341)	$	(96,028)

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 28, 2019	$	(18,046)	$	(88,777)	$	(106,823)
Activity in the period	561		(15,540)		(14,979)
Balance at March 28, 2020	$	(17,485)	$	(104,317)	$	(121,802)

Amounts reclassified from accumulated other comprehensive (loss) to earnings for the three months ended March 27, 2021 and March 28, 2020 were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Pension and Postemployment plans:
Amortization of prior service and net actuarial loss	$	504	$	345

The Company recognizes the amortization of prior service costs in Other (income) expense, net within the Condensed Consolidated Statements of Net Income.

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Income Taxes

3 Months Ended

Mar. 27, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The effective tax rate for the three months ended March 27, 2021 was 20.6%, compared to the effective tax rate for the three months ended March 28, 2020 of 30.6%. The effective tax rate for the 2021 period is lower than the effective tax rate for the comparable 2020 period primarily due to an increase in the forecasted income earned in lower tax jurisdictions in 2021 as compared to 2020. The effective tax rate for the 2021 period is approximately the same as the applicable U.S. statutory rate.

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Earnings Per Share

3 Months Ended

Mar. 27, 2021

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share: 

	Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Numerator:
Net income as reported	$	57,713	$	24,644
Denominator:
Weighted average shares outstanding
Basic	24,532		24,393
Effect of dilutive securities	360		185
Diluted	24,892		24,578
Earnings Per Share:
Basic earnings per share	$	2.35	$	1.01
Diluted earnings per share	$	2.32	$	1.00

Potential shares of common stock relating to stock options and restricted share units excluded from the earnings per share calculation because their effect would be anti-dilutive were 15 and 153,836 for the three months ended March 27, 2021 and March 28, 2020, respectively.

Share Repurchase Program

On April 26, 2019, the Company's Board of Directors authorized a program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2019 to April 30, 2020 ("2019 program"). On April 29, 2020, the Company announced that the Board of Directors authorized a new program to repurchase up to 1,000,000 shares of the Company's common stock for the period May 1, 2020 to April 30, 2021 (the "2020 program") to replace its previous expired 2019 program. On April, 28, 2021, the Company announced that the Board of Directors authorized a new three year program to repurchase up to $300.0 million in the aggregate of shares of the Company’s common stock for the period May 1, 2021 to April 30, 2024 to replace its previous 2020 program.

The Company did not repurchase any shares of its common stock for the three months ended March 27, 2021. During the three months ended March 28, 2020, the Company repurchased 175,110 shares of its common stock totaling $22.9 million.

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Related Party Transactions

3 Months Ended

Mar. 27, 2021

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

The Company has equity ownership in various investments that are accounted for under the equity method. The following is a description of the investments and related party transactions.

Powersem GmbH: The Company owns 45% of the outstanding equity of Powersem GmbH (“Powersem”), a module manufacturer based in Germany.

EB-Tech Co., Ltd.: The Company owns approximately 19% of the outstanding equity of EB Tech Co., Ltd. (“EB Tech”), a company with expertise in radiation technology based in South Korea.

Automated Technology (Phil), Inc.: The Company owns approximately 24% of the outstanding common shares of Automated Technology (Phil), Inc. (“ATEC”), a supplier located in the Philippines that provides assembly and test services. One member of the Company's Board of Directors serves on the Board of Directors of ATEC.

	For the Three Months Ended March 27, 2021						For the Three Months Ended March 28, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	0.2	$	—	$	—	$	0.4	$	—	$	—
Purchase material/service from related party	$	1.1	$	0.1	$	3.0	$	0.2	$	—	$	1.8
	March 27, 2021						December 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Accounts Receivable balance	$	—	$	—	$	—	$	0.1	$	—	$	—
Accounts Payable balance	$	0.2	$	—	$	0.3	$	0.1	$	—	$	0.2

Additionally, the Company has certain cost method investments in VTOOL Ltd. and Securepush Ltd. with a total book value of $0.5 million as of March 27, 2021 and December 26, 2020 and one member of the Company’s Board of Directors is currently an investor and a director of VTOOL Ltd. and Securepush Ltd.

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Segment Information

3 Months Ended

Mar. 27, 2021

Segment Reporting [Abstract]

Segment Information

Segment Information

The Company and its subsidiaries design, manufacture and sell components and modules empowering a sustainable, connected, and safer world. The Company reports its operations by the following segments: Electronics, Automotive, and Industrial. An operating segment is defined as a component of an enterprise that engages in business activities from which it may earn revenues and incur expenses, and about which separate financial information is regularly evaluated by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources. The CODM is the Company’s President and Chief Executive Officer (“CEO”). The CODM allocates resources to and assesses the performance of each operating segment using information about its revenue and operating income (loss) before interest and taxes, but does not evaluate the operating segments using discrete balance sheet information.

Sales, marketing, and research and development expenses are charged directly into each operating segment. Purchasing, logistics, customer service, finance, information technology, and human resources are shared functions that are allocated back to the three operating segments. The Company does not report inter-segment revenue because the operating segments do not record it. Certain expenses, determined by the CODM to be strategic in nature and not directly related to segments' current results, are not allocated but identified as “Other”. Additionally, the Company does not allocate interest and other income, interest expense, or taxes to operating segments. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Although the CODM uses operating income (loss) to evaluate the segments, operating costs included in one segment may benefit other segments. Except as discussed above, the accounting policies for segment reporting are the same as for the Company as a whole.

•Electronics Segment: Consists of one of the broadest product offerings in the industry, including fuses and fuse accessories, positive temperature coefficient (“PTC”) resettable fuses, polymer electrostatic discharge (“ESD”) suppressors, varistors, reed switch based magnetic sensing, gas discharge tubes; semiconductor products such as discrete transient voltage suppressor (“TVS”) diodes, TVS diode arrays, protection and switching thyristors, metal-oxide-semiconductor field effect transistors (“MOSFETs”) and silicon carbide diodes; and insulated gate bipolar transistors (“IGBT”) technologies. The segment covers a broad range of end markets, including industrial motor drives and power conversion, automotive electronics, electric vehicle and related infrastructure, power supplies, data centers and telecommunications, medical devices, alternative energy, building and home automation, appliances, and mobile electronics.

•Automotive Segment: Consists of a wide range of circuit protection, power control and sensing technologies for global original equipment manufacturers (“OEMs”), Tier-I suppliers and parts distributors in passenger car, heavy duty truck, off-road vehicles, material handling, agricultural, construction and other commercial vehicle end markets. Passenger car fuse products for internal combustion engine, hybrid and electric vehicles including blade fuses, battery cable

protectors, resettable fuses, high-current fuses, and high-voltage fuses. Commercial vehicle products include fuses, switches, relays, and power distribution modules used in applications serving a number of end markets, including heavy truck, construction, agriculture and material handling. Automotive sensor products include a wide range of automotive and commercial vehicle products designed to monitor the passenger compartment occupant's safety and environment as well as the vehicle’s powertrain.

•Industrial Segment: Consists of industrial circuit protection products (i.e. fuses, power distribution modules, switches) and industrial control products (i.e. relays, transformers, contactors, sensors). These products are used in a variety of applications and end-markets including: Renewable Energy, Energy Storage, HVAC, Electric Vehicle Infrastructure, Industrial Equipment, Industrial Automation, Construction, Mining, and Oil & Gas.

Segment information is summarized as follows: 

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
Electronics	$	286,535	$	214,189
Automotive	128,529		104,770
Industrial	48,730		27,137
Total net sales	$	463,794	$	346,096
Depreciation and amortization
Electronics	$	15,381	$	15,531
Automotive	7,073		7,187
Industrial	1,744		1,084
Total depreciation and amortization	$	24,198	$	23,802
Operating income
Electronics	$	55,523	$	32,272
Automotive	20,316		14,116
Industrial	3,506		3,534
Other(a)	(2,864)		(5,172)
Total operating income	76,481		44,750
Interest expense	4,673		5,418
Foreign exchange loss	6,837		2,584
Other (income) expense, net	(7,737)		1,249
Income before income taxes	$	72,708	$	35,499

(a) Included in “Other” Operating income for the first quarter of 2021 was $3.5 million of purchase accounting inventory step-up charges, $0.8 million of legal and professional fees and other expenses related to Hartland and other contemplated acquisitions and $0.4 million of restructuring, impairment and other charges, primarily related to employee termination costs. See Note 7, Restructuring, Impairment and Other Charges, for further discussion. In addition, there was a $1.9 million gain from the sale of a building within the Electronics segment.

Included in "Other" Operating income for the first quarter of 2020 was $1.2 million of acquisition integration charges related to the IXYS acquisition and other contemplated acquisitions. In addition, there were $4.0 million of restructuring, impairment and other charges, primarily related to impairment charges of $2.2 million associated with the announced consolidation of a manufacturing facility within the Industrial segment and $1.7 million of employee termination costs and other restructuring charges. See Note 7, Restructuring, Impairment and Other Charges, for further discussion.

The Company’s net sales by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
United States	$	130,931	$	102,910
China	139,158		86,015
Other countries(a)	193,705		157,171
Total net sales	$	463,794	$	346,096

 The Company’s long-lived assets by country were as follows:

(in thousands)	March 27, 2021		December 26, 2020
Long-lived assets
United States	$	48,908	$	46,132
China	85,280		85,876
Mexico	72,499		70,125
Germany	36,227		37,976
Philippines	66,956		66,994
Other countries(a)	35,044		37,075
Total long-lived assets	$	344,914	$	344,178

The Company’s additions to long-lived assets by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Additions to long-lived assets
United States	$	683	$	580
China	2,142		1,657
Mexico	6,121		2,592
Germany	593		753
Philippines	2,443		3,218
Other countries(a)	754		2,508
Total additions to long-lived assets	$	12,736	$	11,308

(a)Each country included in other countries is less than 10% of net sales.

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Summary of Significant Accounting Policies and Other Information (Policies)

3 Months Ended

Mar. 27, 2021

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation 

The Company’s accompanying unaudited Condensed Consolidated Financial Statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information, the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, certain information and disclosures normally included in the consolidated balance sheets, statements of net income and comprehensive income, statements of cash flows, and statement of stockholders' equity prepared in conformity with U.S. GAAP have been condensed or omitted as permitted by such rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. They have been prepared in accordance with accounting policies described in the Company’s Annual Report on Form 10-K for the fiscal year ended December 26, 2020 which should be read in conjunction with the disclosures therein. In the opinion of management, all adjustments considered necessary for a fair presentation have been included and are of a normal, recurring nature. Operating results for interim periods are not necessarily indicative of annual operating results.

Revenue Recognition

Revenue Recognition

Revenue Disaggregation

The following tables disaggregate the Company’s revenue by primary business units for the three months ended March 27, 2021 and March 28, 2020:

	Three Months Ended March 27, 2021
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	132,437	$	—	$	—	$	132,437
Electronics – Semiconductor	154,098		—		—		154,098
Passenger Car Products	—		67,901		—		67,901
Automotive Sensors	—		28,284		—		28,284
Commercial Vehicle Products	—		32,344		—		32,344
Industrial Products	—		—		48,730		48,730
Total	$	286,535	$	128,529	$	48,730	$	463,794

	Three Months Ended March 28, 2020
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	84,598	$	—	$	—	$	84,598
Electronics – Semiconductor	129,591		—		—		129,591
Passenger Car Products	—		52,645		—		52,645
Automotive Sensors	—		24,174		—		24,174
Commercial Vehicle Products	—		27,951		—		27,951
Industrial Products	—		—		27,137		27,137
Total	$	214,189	$	104,770	$	27,137	$	346,096

See Note 15, Segment Information for net sales by segment and countries.

Revenue Recognition

The Company recognizes revenue on product sales in the period in which the Company satisfies its performance obligation and control of the product is transferred to the customer. The Company’s sales arrangements with customers are predominately short term in nature and generally provide for transfer of control at the time of shipment as this is the point at which title and risk of loss of the product transfers to the customer. At the end of each period, for those shipments where title to the products and the risk of loss and rewards of ownership do not transfer until the product has been received by the customer, the Company adjusts revenues and cost of sales for the delay between the time that the products are shipped and when they are received by the customer. The amount of revenue recorded reflects the consideration to which the Company expects to be entitled in exchange for goods and may include adjustments for customer allowance, rebates and price adjustments. The Company’s distribution channels are primarily through direct sales and independent third-party distributors.

The Company elected the practical expedient under Accounting Standards Codification ("ASC") 340-40-25-4 to expense commissions when incurred as the amortization period of the commission asset the Company would have otherwise recognized is less than one year.

Revenue and Billing

The Company generally accepts orders from customers through receipt of purchase orders or electronic data interchange based on written sales agreements and purchasing contracts. Contract pricing and selling agreement terms are based on market factors, costs, and competition. Pricing is often negotiated as an adjustment (premium or discount) from the Company’s published price lists. The customer is invoiced when the Company’s products are shipped to them in accordance with the terms of the sales agreement. As the Company’s standard payment terms are less than one year, the Company elected the practical expedient under ASC 606-10-32-18 to not assess whether a contract has a significant financing component. The Company also elected the practical expedient provided in ASC 606-10-25-18B to treat all product shipping and handling activities as fulfillment activities, and therefore recognize the gross revenue associated with the contract, inclusive of any shipping and handling revenue.

Ship and Debit Program

Some of the terms of the Company’s sales agreements and normal business conditions provide customers (distributors) the ability to receive price adjustments on products previously shipped and invoiced. This practice is common in the industry and is referred to as a “ship and debit” program. This program allows the distributor to debit the Company for the difference between the distributors’ contracted price and a lower price for specific transactions. Under certain circumstances (usually in a competitive situation or large volume opportunity), a distributor will request authorization for pricing allowances to reduce its price. When the Company approves such a reduction, the distributor is authorized to “debit” its account for the difference between the contracted price and the lower approved price. The Company establishes reserves for this program based on historic activity, electronic distributor inventory levels and actual authorizations for the debit and recognizes these debits as a reduction of revenue.

Return to Stock 

The Company has a return to stock policy whereby certain customers, with prior authorization from Littelfuse management, can return previously purchased goods for full or partial credit. The Company establishes an estimated allowance for these returns based on historic activity. Sales revenue and cost of sales are reduced to anticipate estimated returns.

Volume Rebates

The Company offers volume based sales incentives to certain customers to encourage greater product sales. If customers achieve their specific quarterly or annual sales targets, they are entitled to rebates. The Company estimates the projected amount of rebates that will be achieved by the customer and recognizes this estimated cost as a reduction to revenue as products are sold.

Recently Adopted Accounting Standards

Recently Adopted Accounting Standards

In December 2019, the Financial Accounting Standards Board (FASB) issued ASU No. 2019-12, "Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes" as part of its initiative to reduce complexity in the accounting standards. The guidance is effective for fiscal years beginning after December 15, 2020 with early adoption permitted. The adoption of ASU 2019-12 did not have a material impact on our Condensed Consolidated Financial Statements.

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Summary of Significant Accounting Policies and Other Information (Tables)

3 Months Ended

Mar. 27, 2021

Accounting Policies [Abstract]

Schedule of revenue disaggregation

The following tables disaggregate the Company’s revenue by primary business units for the three months ended March 27, 2021 and March 28, 2020:

	Three Months Ended March 27, 2021
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	132,437	$	—	$	—	$	132,437
Electronics – Semiconductor	154,098		—		—		154,098
Passenger Car Products	—		67,901		—		67,901
Automotive Sensors	—		28,284		—		28,284
Commercial Vehicle Products	—		32,344		—		32,344
Industrial Products	—		—		48,730		48,730
Total	$	286,535	$	128,529	$	48,730	$	463,794

	Three Months Ended March 28, 2020
(in thousands)	Electronics Segment		Automotive Segment		Industrial Segment		Total
Electronics – Passive Products and Sensors	$	84,598	$	—	$	—	$	84,598
Electronics – Semiconductor	129,591		—		—		129,591
Passenger Car Products	—		52,645		—		52,645
Automotive Sensors	—		24,174		—		24,174
Commercial Vehicle Products	—		27,951		—		27,951
Industrial Products	—		—		27,137		27,137
Total	$	214,189	$	104,770	$	27,137	$	346,096

Schedule of cash and cash equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash at March 27, 2021 and December 26, 2020 reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows.

(in thousands)	March 27, 2021		December 26, 2020
Cash and cash equivalents	$	572,771	$	687,525
Restricted cash included in prepaid expenses and other current assets	3,462		—
Restricted cash included in other assets	1,064		$	—
Total cash, cash equivalents and restricted cash	$	577,297	$	687,525

Schedule of restricted cash and cash equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash at March 27, 2021 and December 26, 2020 reported within the Condensed Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Condensed Consolidated Statement of Cash Flows.

(in thousands)	March 27, 2021		December 26, 2020
Cash and cash equivalents	$	572,771	$	687,525
Restricted cash included in prepaid expenses and other current assets	3,462		—
Restricted cash included in other assets	1,064		$	—
Total cash, cash equivalents and restricted cash	$	577,297	$	687,525

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Acquisitions (Tables)

3 Months Ended

Mar. 27, 2021

Business Combinations [Abstract]

Schedule of recognized identified assets acquired and liabilities assumed

The following table summarizes the purchase price allocation of the fair value of assets acquired and liabilities assumed in the Hartland acquisition:

(in thousands)	Purchase Price Allocation
Total purchase consideration:
Cash, net of cash acquired, and restricted cash	$	109,852
Allocation of consideration to assets acquired and liabilities assumed:
Trade receivables, net	14,305
Inventories	36,306
Other current assets	2,384
Property, plant, and equipment	6,296
Intangible assets	39,660
Goodwill	38,929
Other non-current assets	3,542
Current liabilities	(25,024)
Other non-current liabilities	(6,546)
	$	109,852

Summary of business acquisition, pro forma information

The following table summarizes, on an unaudited pro forma basis, the combined results of operations of the Company and Hartland as though the acquisition had occurred as of December 29, 2019. The pro forma amounts presented are not necessarily indicative of either the actual consolidated results had the Hartland acquisition occurred as of December 29, 2019 or of future consolidated operating results.

	For the Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Net sales	$	470,832	$	363,617
Income before income taxes	77,288		31,431
Net income	61,317		21,438
Net income per share — basic	2.50		0.88
Net income per share — diluted	2.46		0.87

Summary of business acquisition, pro forma information, nonrecurring adjustments

Pro forma results presented above primarily reflect the following adjustments:

	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Amortization(a)	$	(279)	$	(834)
Depreciation	7		48
Transaction costs(b)	707		(707)
Amortization of inventory step-up(c)	3,490		(5,137)
Income tax (expense) benefit of above items	(831)		1,398

(a)The amortization adjustment for the three months ended March 28, 2020 primarily reflects incremental amortization resulting for the measurement of intangibles at their fair values.

(b)The transaction cost adjustments reflect the reversal of certain bank and attorney fees from the three months ended March 27, 2021 and recognition of those fees during the three months ended March 28, 2020.

(c)The amortization of inventory step-up adjustment reflects the reversal of the amount recognized during the three months ended March 27, 2021 and the recognition of a full quarter of the amortization during the three months ended March 28, 2020. The inventory step-up was amortized over four months as the inventory was sold.

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Inventories (Tables)

3 Months Ended

Mar. 27, 2021

Inventory Disclosure [Abstract]

Schedule of inventory

The components of inventories at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Raw materials	$	97,695	$	85,394
Work in process	102,285		92,783
Finished goods	130,138		114,641
Inventory Reserves	(35,061)		(34,816)
Total	$	295,057	$	258,002

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Property, Plant, and Equipment (Tables)

3 Months Ended

Mar. 27, 2021

Property, Plant and Equipment [Abstract]

Schedule of components of net property, plant, and equipment

The components of net property, plant, and equipment at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Land	$	22,711	$	22,851
Building	124,192		123,497
Equipment	687,563		678,220
Accumulated depreciation and amortization	(489,552)		(480,390)
Total	$	344,914	$	344,178

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 27, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

The amounts for goodwill and changes in the carrying value by segment for the three months ended March 27, 2021 are as follows:

(in thousands)	Electronics		Automotive		Industrial		Total
Net book value of goodwill as of December 26, 2020
Gross goodwill as of December 26, 2020	$	676,325	$	138,354	$	47,551	$	862,230
Accumulated impairment losses as of December 26, 2020	—		(36,423)		(8,995)		(45,418)
Total	676,325		101,931		38,556		816,812
Changes during 2021:
Additions(a)	—		—		38,929		38,929
Currency translation	(8,124)		(2,012)		(19)		(10,155)
Net book value of goodwill as of March 27, 2021
Gross goodwill as of March 27, 2021	668,201		136,229		86,461		890,891
Accumulated impairment losses as of March 27, 2021	—		(36,310)		(8,995)		(45,305)
Total	$	668,201	$	99,919	$	77,466	$	845,586

(a) The additions resulted from the acquisition of Hartland.

Schedule of finite-lived intangible assets

The components of other intangible assets as of March 27, 2021 and December 26, 2020 are as follows:

	As of March 27, 2021
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,251	$	2,051	$	8,200
Patents, licenses and software	142,732		94,636		48,096
Distribution network	43,704		39,307		4,397
Customer relationships, trademarks, and tradenames	400,253		143,652		256,601
Total	$	596,940	$	279,646	$	317,294

	As of December 26, 2020
(in thousands)	Gross Carrying Value		Accumulated Amortization		Net Book Value
Land use rights	$	10,280	$	2,007	$	8,273
Patents, licenses and software	137,210		92,868		44,342
Distribution network	43,910		38,980		4,930
Customer relationships, trademarks, and tradenames	372,064		137,722		234,342
Total	$	563,464	$	271,577	$	291,887

During the three months ended March 27, 2021, the Company recorded additions to intangible assets of $39.7 million, related to the Hartland acquisition, the components of which were as follows:

(in thousands)	Weighted Average Useful Life	Amount
Patents, licenses and software	9.2	$	7,559
Customer relationships, trademarks, and tradenames	13.7	32,101
Total		$	39,660

Schedule of finite-lived intangible assets, future amortization expense

Estimated annual amortization expense related to intangible assets with definite lives as of March 27, 2021 is as follows:

(in thousands)	Amount
2021	$	41,545
2022	40,791
2023	36,491
2024	33,054
2025	32,603
2026 and thereafter	143,331
Total	$	327,815

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Accrued Liabilities (Tables)

3 Months Ended

Mar. 27, 2021

Payables and Accruals [Abstract]

Schedule of components of accrued liabilities

The components of accrued liabilities as of March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Employee-related liabilities	$	45,135	$	50,689
Operating lease liability	7,177		6,811
Interest	2,636		4,517
Restructuring liability	2,588		4,195
Customer liability	794		3,858
Professional services	3,010		3,321
Deferred revenue	2,713		2,959
Other non-income taxes	1,903		2,126
Other	32,398		32,002
Total	$	98,354	$	110,478

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Restructuring, Impairment and Other Charges (Tables)

3 Months Ended

Mar. 27, 2021

Restructuring and Related Activities [Abstract]

Schedule of restructuring, impairment and other charges

The Company recorded restructuring, impairment and other charges for the three months ended March 27, 2021 and March 28, 2020 as follows:

	Three months ended March 27, 2021
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	257	$	—	$	163	$	420
Other restructuring charges	—		17		—		17
Total restructuring charges	257		17		163		437
Impairment	—		—		—		—
Total	$	257	$	17	$	163	$	437

	Three months ended March 28, 2020
(in thousands)	Electronics		Automotive		Industrial		Total
Employee terminations	$	881	$	399	$	321	$	1,601
Other restructuring charges	1		120		3		124
Total restructuring charges	882		519		324		1,725
Impairment	—		—		2,237		2,237
Total	$	882	$	519	$	2,561	$	3,962

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Debt (Tables)

3 Months Ended

Mar. 27, 2021

Debt Disclosure [Abstract]

Schedule of long-term debt instruments

The carrying amounts of debt at March 27, 2021 and December 26, 2020 are as follows:

(in thousands)	March 27, 2021		December 26, 2020
Revolving Credit Facility	$	100,000	$	130,000
Euro Senior Notes, Series A due 2023	138,039		142,679
Euro Senior Notes, Series B due 2028	112,083		115,850
U.S. Senior Notes, Series A due 2022	25,000		25,000
U.S. Senior Notes, Series B due 2027	100,000		100,000
U.S. Senior Notes, Series A due 2025	50,000		50,000
U.S. Senior Notes, Series B due 2030	125,000		125,000
Other	2,619		2,619
Unamortized debt issuance costs	(3,876)		(4,114)
Total debt	648,865		687,034
Less: Current maturities	(25,000)		—
Total long-term debt	$	623,865	$	687,034

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Fair Value of Assets and Liabilities (Tables)

3 Months Ended

Mar. 27, 2021

Fair Value Disclosures [Abstract]

Schedule of fair value, assets measured on recurring basis

The following table presents assets measured at fair value by classification within the fair value hierarchy as of March 27, 2021:

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	66,565	$	—	$	—	$	66,565
Investments in equity securities	25,830		—		—		25,830
Mutual funds	13,397		—		—		13,397
Total	$	105,792	$	—	$	—	$	105,792

The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 26, 2020: 

	Fair Value Measurements Using
(in thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Cash Equivalents	$	73,461	$	—	$	—	$	73,461
Investments in equity securities	19,186		—		—		19,186
Mutual funds	13,249		—		—		13,249
Total	$	105,896	$	—	$	—	$	105,896

Schedule of fair value, by balance sheet grouping

The carrying value and estimated fair values of the Company’s Euro Senior Notes, Series A and Series B and USD Senior Notes, Series A and Series B, as of March 27, 2021 and December 26, 2020 were as follows:

	March 27, 2021				December 26, 2020
(in thousands)	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Euro Senior Notes, Series A due 2023	$	138,039	$	140,084	$	142,679	$	144,323
Euro Senior Notes, Series B due 2028	112,083		117,703		115,850		123,588
USD Senior Notes, Series A due 2022	25,000		25,375		25,000		25,437
USD Senior Notes, Series B due 2027	100,000		106,174		100,000		109,552
USD Senior Notes, Series A due 2025	50,000		52,817		50,000		53,474
USD Senior Notes, Series B due 2030	125,000		130,764		125,000		138,036

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Benefit Plans (Tables)

3 Months Ended

Mar. 27, 2021

Retirement Benefits [Abstract]

Schedule of net benefit costs

The components of net periodic benefit cost for the three months ended March 27, 2021 and March 28, 2020 were as follows: 

	For the Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Components of net periodic benefit cost:
Service cost	$	702	$	618
Interest cost	440		658
Expected return on plan assets	(367)		(727)
Amortization of prior service and net actuarial loss	331		145
Net periodic benefit cost	$	1,106	$	694

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Other Comprehensive Income (Tables)

3 Months Ended

Mar. 27, 2021

Equity [Abstract]

Schedule of components of comprehensive income (loss)

Changes in other comprehensive income (loss) by component were as follows:

(in thousands)	Three Months Ended March 27, 2021						Three Months Ended March 28, 2020
	Pre-tax		Tax		Net of Tax		Pre-tax		Tax		Net of Tax
Defined benefit pension plan and other adjustments	$	506	$	52	$	454	$	555	$	(6)	$	561
Foreign currency translation adjustments	(5,325)		—		(5,325)		(15,540)		—		(15,540)
Total change in other comprehensive income (loss)	$	(4,819)	$	52	$	(4,871)	$	(14,985)	$	(6)	$	(14,979)

Schedule of accumulated other comprehensive income (loss)

The following tables set forth the changes in accumulated other comprehensive (loss) by component for the three months ended March 27, 2021 and March 28, 2020:

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 26, 2020	$	(34,141)	$	(57,016)	$	(91,157)
Activity in the period	454		(5,325)		(4,871)
Balance at March 27, 2021	$	(33,687)	$	(62,341)	$	(96,028)

(in thousands)	Defined benefit pension plan and other adjustments		Foreign currency translation adjustment		Accumulated other comprehensive (loss)
Balance at December 28, 2019	$	(18,046)	$	(88,777)	$	(106,823)
Activity in the period	561		(15,540)		(14,979)
Balance at March 28, 2020	$	(17,485)	$	(104,317)	$	(121,802)

Summary of reclassification out of accumulated other comprehensive income

Amounts reclassified from accumulated other comprehensive (loss) to earnings for the three months ended March 27, 2021 and March 28, 2020 were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Pension and Postemployment plans:
Amortization of prior service and net actuarial loss	$	504	$	345

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Earnings Per Share (Tables)

3 Months Ended

Mar. 27, 2021

Earnings Per Share [Abstract]

Schedule of earnings per share, basic and diluted

The following table sets forth the computation of basic and diluted earnings per share: 

	Three Months Ended
(in thousands, except per share amounts)	March 27, 2021		March 28, 2020
Numerator:
Net income as reported	$	57,713	$	24,644
Denominator:
Weighted average shares outstanding
Basic	24,532		24,393
Effect of dilutive securities	360		185
Diluted	24,892		24,578
Earnings Per Share:
Basic earnings per share	$	2.35	$	1.01
Diluted earnings per share	$	2.32	$	1.00

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Related Party Transactions (Tables)

3 Months Ended

Mar. 27, 2021

Related Party Transactions [Abstract]

Schedule of related party transactions

	For the Three Months Ended March 27, 2021						For the Three Months Ended March 28, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	0.2	$	—	$	—	$	0.4	$	—	$	—
Purchase material/service from related party	$	1.1	$	0.1	$	3.0	$	0.2	$	—	$	1.8
	March 27, 2021						December 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Accounts Receivable balance	$	—	$	—	$	—	$	0.1	$	—	$	—
Accounts Payable balance	$	0.2	$	—	$	0.3	$	0.1	$	—	$	0.2

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Segment Information (Tables)

3 Months Ended

Mar. 27, 2021

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

Segment information is summarized as follows: 

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
Electronics	$	286,535	$	214,189
Automotive	128,529		104,770
Industrial	48,730		27,137
Total net sales	$	463,794	$	346,096
Depreciation and amortization
Electronics	$	15,381	$	15,531
Automotive	7,073		7,187
Industrial	1,744		1,084
Total depreciation and amortization	$	24,198	$	23,802
Operating income
Electronics	$	55,523	$	32,272
Automotive	20,316		14,116
Industrial	3,506		3,534
Other(a)	(2,864)		(5,172)
Total operating income	76,481		44,750
Interest expense	4,673		5,418
Foreign exchange loss	6,837		2,584
Other (income) expense, net	(7,737)		1,249
Income before income taxes	$	72,708	$	35,499

(a) Included in “Other” Operating income for the first quarter of 2021 was $3.5 million of purchase accounting inventory step-up charges, $0.8 million of legal and professional fees and other expenses related to Hartland and other contemplated acquisitions and $0.4 million of restructuring, impairment and other charges, primarily related to employee termination costs. See Note 7, Restructuring, Impairment and Other Charges, for further discussion. In addition, there was a $1.9 million gain from the sale of a building within the Electronics segment.

Schedule of disclosure on geographic areas, long-lived assets in individual foreign countries by country

The Company’s net sales by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Net sales
United States	$	130,931	$	102,910
China	139,158		86,015
Other countries(a)	193,705		157,171
Total net sales	$	463,794	$	346,096

 The Company’s long-lived assets by country were as follows:

(in thousands)	March 27, 2021		December 26, 2020
Long-lived assets
United States	$	48,908	$	46,132
China	85,280		85,876
Mexico	72,499		70,125
Germany	36,227		37,976
Philippines	66,956		66,994
Other countries(a)	35,044		37,075
Total long-lived assets	$	344,914	$	344,178

The Company’s additions to long-lived assets by country were as follows:

	Three Months Ended
(in thousands)	March 27, 2021		March 28, 2020
Additions to long-lived assets
United States	$	683	$	580
China	2,142		1,657
Mexico	6,121		2,592
Germany	593		753
Philippines	2,443		3,218
Other countries(a)	754		2,508
Total additions to long-lived assets	$	12,736	$	11,308

(a)Each country included in other countries is less than 10% of net sales.

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Summary of Significant Accounting Policies and Other Information (Details Textual) customer in Thousands, associate in Thousands	3 Months Ended
	Mar. 27, 2021 country associate customer
Accounting Policies [Abstract]
Countries where product is used (country) | country	15
Global associates (associate) | associate	12
Number of customers (over) | customer	100

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Summary of Significant Accounting Policies and Other Information - Revenue Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Disaggregation of Revenue
Net sales	$ 463,794	$ 346,096
Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	132,437	84,598
Electronics – Semiconductor
Disaggregation of Revenue
Net sales	154,098	129,591
Passenger Car Products
Disaggregation of Revenue
Net sales	67,901	52,645
Automotive Sensors
Disaggregation of Revenue
Net sales	28,284	24,174
Commercial Vehicle Products
Disaggregation of Revenue
Net sales	32,344	27,951
Industrial Products
Disaggregation of Revenue
Net sales	48,730	27,137
Electronics Segment
Disaggregation of Revenue
Net sales	286,535	214,189
Electronics Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	132,437	84,598
Electronics Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	154,098	129,591
Electronics Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	0	0
Electronics Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	0	0
Electronics Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	0	0
Electronics Segment | Industrial Products
Disaggregation of Revenue
Net sales	0	0
Automotive Segment
Disaggregation of Revenue
Net sales	128,529	104,770
Automotive Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	0	0
Automotive Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	0	0
Automotive Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	67,901	52,645
Automotive Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	28,284	24,174
Automotive Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	32,344	27,951
Automotive Segment | Industrial Products
Disaggregation of Revenue
Net sales	0	0
Industrial Segment
Disaggregation of Revenue
Net sales	48,730	27,137
Industrial Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales	0	0
Industrial Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales	0	0
Industrial Segment | Passenger Car Products
Disaggregation of Revenue
Net sales	0	0
Industrial Segment | Automotive Sensors
Disaggregation of Revenue
Net sales	0	0
Industrial Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales	0	0
Industrial Segment | Industrial Products
Disaggregation of Revenue
Net sales	$ 48,730	$ 27,137

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Summary of Significant Accounting Policies and Other Information - Cash and cash equivalents (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020	Dec. 28, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 572,771	$ 687,525	$ 620,575
Restricted cash included in prepaid expenses and other current assets	3,462	0	0
Restricted cash included in other assets	1,064	0	0
Total cash, cash equivalents and restricted cash	$ 577,297	$ 687,525	$ 620,575	$ 531,139

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Acquisitions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 28, 2021	Mar. 27, 2021	Mar. 28, 2020
Business Acquisition
Cash, net of cash acquired, and restricted cash		$ 109,852	$ 0
Restricted cash		1,700
Acquisition related costs		700
Inventory amortization period (in years)			4 months
Hartland Controls
Business Acquisition
Annualized sales	$ 70,000
Hartland Controls
Business Acquisition
Cash acquired from acquisition	112,300
Cash, net of cash acquired, and restricted cash	109,852
Net sales		16,700
Income (loss) before income taxes		(2,200)
Inventory adjustment	$ 6,800	$ 3,500

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Acquisitions - Preliminary Price Allocation (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 28, 2021	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Total purchase consideration:
Cash, net of cash acquired, and restricted cash		$ 109,852	$ 0
Allocation of consideration to assets acquired and liabilities assumed:
Goodwill		$ 845,586		$ 816,812
Hartland Controls
Total purchase consideration:
Cash, net of cash acquired, and restricted cash	$ 109,852
Allocation of consideration to assets acquired and liabilities assumed:
Trade receivables, net	14,305
Inventories	36,306
Other current assets	2,384
Property, plant, and equipment	6,296
Intangible assets	39,660
Goodwill	38,929
Other non-current assets	3,542
Current liabilities	(25,024)
Other non-current liabilities	(6,546)
Assets acquired and liabilities assumed	$ 109,852

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Acquisitions - Business Acquisition Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Business Combinations [Abstract]
Net sales	$ 470,832	$ 363,617
Income before income taxes	77,288	31,431
Net income	$ 61,317	$ 21,438
Net income per share — basic (in dollars per share)	$ 2.50	$ 0.88
Net income per share — diluted (in dollars per share)	$ 2.46	$ 0.87

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Acquisitions - Pro Forma Information Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	$ 61,317	$ 21,438
Amortization
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	(279)	(834)
Depreciation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	7	48
Transaction costs
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	707	(707)
Amortization of inventory step-up
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	3,490	(5,137)
Income tax (expense) benefit of above items
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment
Net income	$ (831)	$ 1,398

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Inventories - Components of Inventories (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Inventory Disclosure [Abstract]
Raw materials	$ 97,695	$ 85,394
Work in process	102,285	92,783
Finished goods	130,138	114,641
Inventory Reserves	(35,061)	(34,816)
Total	$ 295,057	$ 258,002

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Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Property, Plant and Equipment
Accumulated depreciation and amortization	$ (489,552)	$ (480,390)
Total	344,914	344,178
Land
Property, Plant and Equipment
Property, plant, and equipment, gross	22,711	22,851
Building
Property, Plant and Equipment
Property, plant, and equipment, gross	124,192	123,497
Equipment
Property, Plant and Equipment
Property, plant, and equipment, gross	$ 687,563	$ 678,220

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Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Property, Plant and Equipment [Abstract]
Depreciation	$ 13,677	$ 13,821

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Goodwill and Other Intangible Assets - Amounts for Goodwill and Changes in Carrying Value by Operating Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Dec. 26, 2020
Goodwill
Gross goodwill	$ 890,891	$ 862,230
Accumulated impairment losses	(45,305)	(45,418)
Net goodwill	845,586	816,812
Additions	38,929
Currency translation	(10,155)
Electronics
Goodwill
Gross goodwill	668,201	676,325
Accumulated impairment losses	0	0
Net goodwill	668,201	676,325
Additions	0
Currency translation	(8,124)
Automotive
Goodwill
Gross goodwill	136,229	138,354
Accumulated impairment losses	(36,310)	(36,423)
Net goodwill	99,919	101,931
Additions	0
Currency translation	(2,012)
Industrial
Goodwill
Gross goodwill	86,461	47,551
Accumulated impairment losses	(8,995)	(8,995)
Net goodwill	77,466	$ 38,556
Additions	38,929
Currency translation	$ (19)

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Goodwill and Other Intangible Assets - Details of Other Intangible Assets and Related Future Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Dec. 26, 2020
Finite-Lived Intangible Assets
Gross Carrying Value	$ 596,940	$ 563,464
Accumulated Amortization	279,646	271,577
Net Book Value	$ 317,294	291,887
Weighted Average Useful Life
Amount	$ 39,660
Land use rights
Finite-Lived Intangible Assets
Gross Carrying Value	10,251	10,280
Accumulated Amortization	2,051	2,007
Net Book Value	8,200	8,273
Patents, licenses and software
Finite-Lived Intangible Assets
Gross Carrying Value	142,732	137,210
Accumulated Amortization	94,636	92,868
Net Book Value	$ 48,096	44,342
Weighted Average Useful Life	9 years 2 months 12 days
Amount	$ 7,559
Distribution network
Finite-Lived Intangible Assets
Gross Carrying Value	43,704	43,910
Accumulated Amortization	39,307	38,980
Net Book Value	4,397	4,930
Customer relationships, trademarks, and tradenames
Finite-Lived Intangible Assets
Gross Carrying Value	400,253	372,064
Accumulated Amortization	143,652	137,722
Net Book Value	$ 256,601	$ 234,342
Weighted Average Useful Life	13 years 8 months 12 days
Amount	$ 32,101

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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangibles	$ 10,521	$ 9,981
Impairment of intangibles		$ 300
Finite-Lived Intangible Assets
Acquired finite lived intangibles	38,929
Hartland Controls
Finite-Lived Intangible Assets
Acquired finite lived intangibles	$ 39,700

XML

Goodwill and Other Intangible Assets - Estimated Amortization Expense Related to Intangible Assets with Definite Lives (Details) $ in Thousands	Mar. 27, 2021 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2021	$ 41,545
2022	40,791
2023	36,491
2024	33,054
2025	32,603
2026 and thereafter	143,331
Total	$ 327,815

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Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Payables and Accruals [Abstract]
Employee-related liabilities	$ 45,135	$ 50,689
Operating lease liability	7,177	6,811
Interest	2,636	4,517
Restructuring liability	2,588	4,195
Customer liability	794	3,858
Professional services	3,010	3,321
Deferred revenue	2,713	2,959
Other non-income taxes	1,903	2,126
Other	32,398	32,002
Accrued liabilities	$ 98,354	$ 110,478

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Restructuring, Impairment and Other Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Restructuring Cost and Reserve
Total restructuring charges	$ 437	$ 1,725
Impairment charges	0	2,237
Restructuring costs	437	3,962
Restructuring reserves	2,600		$ 4,200
Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	420	1,601
Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	17	124
Electronics
Restructuring Cost and Reserve
Total restructuring charges	257	882
Impairment charges	0	0
Restructuring costs	257	882
Electronics | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	257	881
Electronics | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	0	1
Automotive
Restructuring Cost and Reserve
Total restructuring charges	17	519
Impairment charges	0	0
Restructuring costs	17	519
Automotive | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	0	399
Automotive | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	17	120
Industrial
Restructuring Cost and Reserve
Total restructuring charges	163	324
Impairment charges	0	2,237
Restructuring costs	163	2,561
Industrial | Employee terminations
Restructuring Cost and Reserve
Total restructuring charges	163	321
Industrial | Other restructuring charges
Restructuring Cost and Reserve
Total restructuring charges	$ 0	3
Industrial | Facility Closing
Restructuring Cost and Reserve
Impairment charges		$ 2,200

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Debt - Carrying Amounts of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Debt Instrument
Unamortized debt issuance costs	$ (3,876)	$ (4,114)
Total debt	648,865	687,034
Less: Current maturities	(25,000)	0
Total long-term debt	623,865	687,034
Revolving Credit Facility
Debt Instrument
Long-term debt, gross	100,000	130,000
Senior Notes | Euro Senior Notes, Series A due 2023
Debt Instrument
Long-term debt, gross	138,039	142,679
Senior Notes | Euro Senior Notes, Series B due 2028
Debt Instrument
Long-term debt, gross	112,083	115,850
Senior Notes | U.S. Senior Notes, Series A due 2022
Debt Instrument
Long-term debt, gross	25,000	25,000
Senior Notes | U.S. Senior Notes, Series B due 2027
Debt Instrument
Long-term debt, gross	100,000	100,000
Senior Notes | U.S. Senior Notes, Series A due 2025
Debt Instrument
Long-term debt, gross	50,000	50,000
Senior Notes | U.S. Senior Notes, Series B due 2030
Debt Instrument
Long-term debt, gross	125,000	125,000
Other
Debt Instrument
Long-term debt, gross	$ 2,619	$ 2,619

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Debt - Narrative (Details)			3 Months Ended
	Apr. 03, 2020 USD ($)	Mar. 04, 2016	Mar. 27, 2021 USD ($)	Mar. 28, 2020 USD ($)	Dec. 26, 2020 USD ($)	Apr. 02, 2020 USD ($)	Jan. 16, 2018 USD ($)	Nov. 15, 2017 USD ($) series	Feb. 15, 2017 USD ($)	Dec. 08, 2016 USD ($) series	Dec. 08, 2016 EUR (€) series
Debt Instrument
Payments of revolving credit facility			$ (30,000,000.0)	$ 0
Cash paid during the period for interest			$ 6,235,000	$ 7,354,000
Credit Agreement
Debt Instrument
Effective interest rate (percent)			1.61%
Letter of credit outstanding (less than)			$ 0
Credit Agreement | Minimum
Debt Instrument
Commitment fee (percent)		0.125%
Credit Agreement | Maximum
Debt Instrument
Commitment fee (percent)		0.20%
Credit Agreement | LIBOR | Minimum
Debt Instrument
Basis spread on variable rate (percent)		1.25%
Credit Agreement | LIBOR | Maximum
Debt Instrument
Basis spread on variable rate (percent)		2.00%
Credit Agreement | Base Rate | Minimum
Debt Instrument
Basis spread on variable rate (percent)		0.25%
Credit Agreement | Base Rate | Maximum
Debt Instrument
Basis spread on variable rate (percent)		1.00%
Credit Agreement | Revolving Credit Facility
Debt Instrument
Remaining borrowing capacity			571,300,000
Term Loan
Debt Instrument
Elimination of unsecured team loan facility	$ 200,000,000.0
Long-term debt, gross						$ 140,000,000.0
Senior Notes | Euro Senior Notes, Series A and B
Debt Instrument
Face amount of debt | €											€ 212,000,000
Number of series | series										2	2
Senior Notes | Euro Senior Notes, Series A due 2023
Debt Instrument
Long-term debt, gross			138,039,000		$ 142,679,000
Face amount of debt | €											€ 117,000,000
Stated interest rate (percent)										1.14%	1.14%
Senior Notes | Euro Senior Notes, Series B due 2028
Debt Instrument
Long-term debt, gross			112,083,000		115,850,000
Face amount of debt | €											€ 95,000,000
Stated interest rate (percent)										1.83%	1.83%
Senior Notes | U.S. Senior Notes, Series A and B
Debt Instrument
Face amount of debt										$ 125,000,000
Number of series | series										2	2
Senior Notes | U.S. Senior Notes, Series A
Debt Instrument
Face amount of debt									$ 25,000,000
Stated interest rate (percent)									3.03%
Senior Notes | U.S. Senior Notes, Series B
Debt Instrument
Face amount of debt									$ 100,000,000
Stated interest rate (percent)									3.74%
Senior Notes | US Senior Notes A and B Due 2025 and 2030
Debt Instrument
Face amount of debt								$ 175,000,000
Number of series | series								2
Senior Notes | U.S. Senior Notes, Series A due 2025
Debt Instrument
Long-term debt, gross			50,000,000		50,000,000
Face amount of debt							$ 50,000,000
Stated interest rate (percent)							3.48%
Senior Notes | U.S. Senior Notes, Series B due 2030
Debt Instrument
Long-term debt, gross			$ 125,000,000		$ 125,000,000
Face amount of debt							$ 125,000,000
Stated interest rate (percent)							3.78%

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Fair Value of Assets and Liabilities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 27, 2021	Dec. 26, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Investments in equity securities		$ 25,830	$ 19,186
Patents
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges	$ 300
Land and Building
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Impairment charges	$ 1,900
Other Expense (Income)
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Investments in equity securities		$ 500	$ 500

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Fair Value of Assets and Liabilities - Assets Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	$ 66,565	$ 73,461
Investments in equity securities	25,830	19,186
Mutual funds	13,397	13,249
Total	105,792	105,896
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	66,565	73,461
Investments in equity securities	25,830	19,186
Mutual funds	13,397	13,249
Total	105,792	105,896
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	0	0
Investments in equity securities	0	0
Mutual funds	0	0
Total	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash Equivalents	0	0
Investments in equity securities	0	0
Mutual funds	0	0
Total	$ 0	$ 0

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Fair Value of Assets and Liabilities - Carrying Value and Estimated Fair Value of Senior Notes (Details) - Senior Notes - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020
Carrying Value | Euro Senior Notes, Series A due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	$ 138,039	$ 142,679
Carrying Value | Euro Senior Notes, Series B due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	112,083	115,850
Carrying Value | U.S. Senior Notes, Series A due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	25,000	25,000
Carrying Value | U.S. Senior Notes, Series B due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	100,000	100,000
Carrying Value | U.S. Senior Notes, Series A due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	50,000	50,000
Carrying Value | U.S. Senior Notes, Series B due 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	125,000	125,000
Estimated Fair Value | Euro Senior Notes, Series A due 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	140,084	144,323
Estimated Fair Value | Euro Senior Notes, Series B due 2028
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	117,703	123,588
Estimated Fair Value | U.S. Senior Notes, Series A due 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	25,375	25,437
Estimated Fair Value | U.S. Senior Notes, Series B due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	106,174	109,552
Estimated Fair Value | U.S. Senior Notes, Series A due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	52,817	53,474
Estimated Fair Value | U.S. Senior Notes, Series B due 2030
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt fair value	$ 130,764	$ 138,036

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Benefit Plans - Benefit Plan Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Retirement Benefits [Abstract]
Service cost	$ 702	$ 618
Interest cost	440	658
Expected return on plan assets	(367)	(727)
Amortization of prior service and net actuarial loss	331	145
Net periodic benefit cost	$ 1,106	$ 694

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Benefit Plans - Narrative (Details) $ in Thousands, £ in Millions		3 Months Ended
	Apr. 06, 2020 GBP (£)	Dec. 31, 2021 USD ($)	Mar. 27, 2021 USD ($)	Jun. 27, 2020 USD ($)	Jun. 27, 2020 GBP (£)	Mar. 28, 2020 USD ($)	Apr. 07, 2020 USD ($)
Defined Benefit Plan Disclosure
Contributions expected			$ 2,200
Expected direct payments			3,800
Defined benefit plan expense			1,106			$ 694
Estimated decrease in pension cost							$ 55,000
Estimated percent reduction in pension costs							37.00%
Benefit obligation, unamortized actuarial loss | £	£ 13.4
Cash contribution				$ 10,400	£ 8.4
Defined benefit pension plan and other adjustments
Defined Benefit Plan Disclosure
Benefit obligation, unamortized actuarial loss | £	£ 10.9
Forecast | Minimum
Defined Benefit Plan Disclosure
Estimated settlement charge		$ 18,000
Forecast | Maximum
Defined Benefit Plan Disclosure
Estimated settlement charge		$ 22,000
Foreign Plan
Defined Benefit Plan Disclosure
Defined benefit plan expense			500			500
Other comprehensive income as component of net period benefit cost, before tax			$ 200			$ 200

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Other Comprehensive Income - Schedule of Components of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Other Comprehensive Income (Loss)
Pre-tax	$ (4,819)	$ (14,985)
Tax	52	(6)
Total change in other comprehensive income (loss)	(4,871)	(14,979)
Defined benefit pension plan and other adjustments
Other Comprehensive Income (Loss)
Pre-tax	506	555
Tax	52	(6)
Total change in other comprehensive income (loss)	454	561
Foreign currency translation adjustment
Other Comprehensive Income (Loss)
Pre-tax	(5,325)	(15,540)
Tax	0	0
Total change in other comprehensive income (loss)	$ (5,325)	$ (15,540)

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Other Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	$ 1,608,773	$ 1,496,014
Other comprehensive loss, net of tax	(4,871)	(14,979)
Balance	1,660,737	1,476,948
Accumulated other comprehensive (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	(91,157)	(106,823)
Other comprehensive loss, net of tax	(4,871)	(14,979)
Balance	(96,028)	(121,802)
Defined benefit pension plan and other adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	(34,141)	(18,046)
Other comprehensive loss, net of tax	454	561
Balance	(33,687)	(17,485)
Foreign currency translation adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Balance	(57,016)	(88,777)
Other comprehensive loss, net of tax	(5,325)	(15,540)
Balance	$ (62,341)	$ (104,317)

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Other Comprehensive Income - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Amortization of prior service and net actuarial loss | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Amortization of prior service and net actuarial loss	$ 504	$ 345

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Income Taxes (Details Textual)	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Income Tax Disclosure [Abstract]
Effective tax rate (percent)	20.60%	30.60%

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Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Numerator:
Net income as reported	$ 57,713	$ 24,644
Weighted average shares outstanding
Basic (in shares)	24,532	24,393
Effect of dilutive securities (in shares)	360	185
Diluted (in shares)	24,892	24,578
Earnings Per Share:
Basic (loss) earnings per share (in dollars per share)	$ 2.35	$ 1.01
Diluted (loss) earnings per share (in dollars per share)	$ 2.32	$ 1.00

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Earnings Per Share - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Apr. 28, 2021	Apr. 29, 2020	Apr. 26, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive securities excluded (in shares)	15	153,836
Shares repurchased (in shares)	0	175,110
Repurchases of common stock		$ 22,927
2019 Share Repurchase Program
Antidilutive Securities Excluded from Computation of Earnings Per Share
Repurchase authorized (in shares)					1,000,000
2020 Share Repurchase Program
Antidilutive Securities Excluded from Computation of Earnings Per Share
Repurchase authorized (in shares)				1,000,000
2020 Share Repurchase Program | Subsequent Event
Antidilutive Securities Excluded from Computation of Earnings Per Share
Repurchase authorized (in shares)			300,000,000.0

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Related Party Transactions (Details) - Equity Method Investee - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Powersem
Related Party Transaction
Ownership percentage (percent)	45.00%
Sales to related party	$ 0.2	$ 0.4
Purchase material/service from related party	1.1	0.2
Accounts Receivable balance	0.0		$ 0.1
Accounts Payable balance	$ 0.2		0.1
EB Tech
Related Party Transaction
Ownership percentage (percent)	19.00%
Sales to related party	$ 0.0	0.0
Purchase material/service from related party	0.1	0.0
Accounts Receivable balance	0.0		0.0
Accounts Payable balance	$ 0.0		0.0
ATEC
Related Party Transaction
Ownership percentage (percent)	24.00%
Sales to related party	$ 0.0	0.0
Purchase material/service from related party	3.0	$ 1.8
Accounts Receivable balance	0.0		0.0
Accounts Payable balance	0.3		0.2
VTOOL Ltd. and Securepush Ltd.
Related Party Transaction
Cost method investments	$ 0.5		$ 0.5

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Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Segment Reporting Information
Net sales	$ 463,794	$ 346,096
Depreciation and amortization	24,198	23,802
Operating income	76,481	44,750
Interest expense	4,673	5,418
Foreign exchange loss	6,837	2,584
Other (income) expense, net	(7,737)	1,249
Income before income taxes	72,708	35,499
Electronics
Segment Reporting Information
Net sales	286,535	214,189
Depreciation and amortization	15,381	15,531
Electronics | Operating Segments
Segment Reporting Information
Operating income	55,523	32,272
Automotive
Segment Reporting Information
Net sales	128,529	104,770
Depreciation and amortization	7,073	7,187
Automotive | Operating Segments
Segment Reporting Information
Operating income	20,316	14,116
Industrial
Segment Reporting Information
Net sales	48,730	27,137
Depreciation and amortization	1,744	1,084
Industrial | Operating Segments
Segment Reporting Information
Operating income	3,506	3,534
Other | Corporate Non-Segment
Segment Reporting Information
Operating income	$ (2,864)	$ (5,172)

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Segment Information - Narrative (Details) $ in Thousands		3 Months Ended
	Jan. 28, 2021 USD ($)	Mar. 27, 2021 USD ($) segment	Mar. 28, 2020 USD ($)
Segment Reporting Information
Number of operating segments | segment		3
Acquisition related costs		$ 700
Restructuring charges		437	$ 1,725
Impairment charges		0	2,237
Hartland Controls
Segment Reporting Information
Inventory adjustment	$ 6,800	3,500
Operating Income (Loss) | IXYS
Segment Reporting Information
Acquisition related costs			1,200
Operating Income (Loss) | Corporate Non-Segment | Hartland Controls
Segment Reporting Information
Inventory adjustment		3,500
Other | Operating Income (Loss)
Segment Reporting Information
Restructuring charges		400
Other | Operating Income (Loss) | Hartland Controls
Segment Reporting Information
Acquisition related costs		800
Industrial
Segment Reporting Information
Restructuring charges		163	324
Impairment charges		0	2,237
Electronics
Segment Reporting Information
Restructuring charges		257	882
Gain (loss) on sale of properties		1,900
Impairment charges		0	0
Facility Closing | Industrial
Segment Reporting Information
Impairment charges			2,200
Employee terminations
Segment Reporting Information
Restructuring charges		420	1,601
Employee terminations | IXYS
Segment Reporting Information
Restructuring charges			4,000
Employee terminations | Industrial
Segment Reporting Information
Restructuring charges		163	321
Employee terminations | Electronics
Segment Reporting Information
Restructuring charges		$ 257	$ 881

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Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Segment Reporting Information
Net sales	$ 463,794	$ 346,096
Long-lived assets	344,914		$ 344,178
Additions to long-lived assets	12,736	11,308
United States
Segment Reporting Information
Net sales	130,931	102,910
Long-lived assets	48,908		46,132
Additions to long-lived assets	683	580
China
Segment Reporting Information
Net sales	139,158	86,015
Long-lived assets	85,280		85,876
Additions to long-lived assets	2,142	1,657
Mexico
Segment Reporting Information
Long-lived assets	72,499		70,125
Additions to long-lived assets	6,121	2,592
Germany
Segment Reporting Information
Long-lived assets	36,227		37,976
Additions to long-lived assets	593	753
Philippines
Segment Reporting Information
Long-lived assets	66,956		66,994
Additions to long-lived assets	2,443	3,218
Other countries
Segment Reporting Information
Net sales	193,705	157,171
Long-lived assets	35,044		$ 37,075
Additions to long-lived assets	$ 754	$ 2,508