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Littelfuse

lfus · NASDAQ Technology
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Ticker lfus
Exchange NASDAQ
Sector Technology
Industry Hardware, Equipment & Parts
Employees 10,000+
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FY2018 Annual Report · Littelfuse
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 2018 Annual Report 

Dear Shareholders, 

The strength of our global brand, technology leadership and strong execution of our growth strategy have 
positioned Littelfuse within the secular trends of a safer, greener and increasingly connected world. These 
long-term trends drive ever-greater sophistication in electrical architecture, increasing the content of our 
circuit protection, power control and sensing products in applications across industrial, transportation and 
electronics end markets. 

Our  strategy  accelerates  organic  growth  with  a  complement  of  strategic  acquisitions.  The  tremendous 
growth across our businesses has been driven by the execution of several initiatives related to this strategy: 

•

•

•

Increased innovation across our protect, control and sense product portfolio to ensure enhanced
performance and continued differentiation.
Identification of cross-segment opportunities where we can leverage technologies and customer
relationships to broadly take our products to market.
Focus on underrepresented geographies and high-growth markets to expand our global reach and
presence.

We  continue  to  add  to  our  portfolio  with  strategic  acquisitions.  Our  transactions  align  with  our  core 
technology competencies of circuit protection, power control and sensing. We remain disciplined with our 
acquisition efforts to ensure we meet our strategic and financial investment criteria and continue to focus 
on: 

Expanding our legacy circuit protection product portfolios.
Strengthening our power control and sensing platforms.

•
•
• Growing our geographic and market access.

With our execution of this dual organic and strategic acquisition strategy, we have outpaced end market 
growth. 

Fiscal 2018 represented another year of significant execution of our growth strategy. Our global teams, in 
close  collaboration  with  our  customers  and  partners,  captured  many  strategic  wins  in  our  target  end 
markets. We drove superior results for our shareholders compared to 2017: 

• Net sales of $1.72 billion grew 41 percent with organic sales growth of 8 percent1.
• GAAP diluted earnings per share (EPS) was $6.52, an increase of 25 percent.
•
• Cash flow from operating activities was a record $332 million, up 23 percent.

Adjusted diluted EPS was $9.442, an increase of 22 percent.

During  the  year,  we  took  a  significant  step  in  expanding  our  power  control  platform  with  our  strategic 
acquisition of IXYS Corporation—the largest acquisition in our history. This brings critical scale, volume and 
an extensive industrial electronics customer base to our power semiconductor business. As a result, we 
have expanded our power control technology platform, creating tremendous opportunities to capture high-
growth end markets like industrial motor drives, renewable energy, electrical vehicle charging infrastructure 
and long-term transportation applications. The integration is going well; we have made significant progress 
and are seeing the benefits of our expanded portfolio and combined global teams. With our focus on serving 
customer  needs  and  driving  business  optimization,  we  significantly  grew  revenue  and  generated  cost 
synergies, both above our expectations. 

Our customers continue to view our operational excellence as a differentiator. As our business expands, 
we have taken steps to institutionalize our Littelfuse Operating System to ensure it remains a foundational 
part of our DNA. We are fully committed to fostering our high-performance, action-oriented, Lean and Six 
Sigma operating culture which is led by our diverse, experienced leadership team. Our global leaders are 
focused  on  continued  differentiation  and  delivering  results  which  are  reflected  in  our  sustained  strong 

 2018 Annual Report 

operational performance. We have deployed a continuous improvement mindset across our global footprint 
to drive enhanced performance and to maintain the consistency and speed within our businesses that our 
customers have come to expect. Our receipt of many customer and industry awards in 2018 is recognition 
of the high-quality solutions, service and support we deliver to our customers everywhere, every day. 

Our strong financial performance over the last two years shows the success in our execution of our five-
year growth strategy. Over this two-year period, we have achieved average annual revenue growth of 28 
percent  and  average  organic  sales  growth  of  8  percent1.  This  growth,  supported  by  our  foundation  of 
operational excellence, has driven sustained  profitability  and double-digit annual growth  in earnings per 
share. We have generated free cash flow3 well in excess of net income and returned 30 percent of our free 
cash flow to shareholders through dividends and share repurchases while reinvesting in our business over 
the past two years. We are well underway to successfully delivering our growth strategy. 

The innovation, hard work and dedication of our 12,000 worldwide associates have made our achievements 
possible.  Our  strong  commitment  to  customers  continues  to  be  a  key  asset  in  an  increasingly  dynamic 
marketplace. Overall,  the company’s  brand,  positioning and foundation  of operational excellence are all 
stronger  today  than  two  years  ago  when  we  communicated  our  five-year  growth  strategy.  We  are  well 
prepared  to  meet  the  changing  needs  of  our  customers,  pursue  continued  growth  and  maximize 
shareholder value. Looking ahead, we remain confident that our leading technologies, global footprint, close 
customer relationships and talented associates position us for continued growth in excess of the growth of 
the markets we serve. 

The evolution of our company continues to highlight the importance and value of our Board of Directors. 
Our  Board  is  composed  of  seasoned  business  leaders  with  diverse  backgrounds,  skillsets,  industry 
experiences and expertise and reflects a balance of fresh perspectives and continuity. Consistent with this 
approach, in addition to the appointment of Dr. Nathan Zommer in January 2018, I am pleased that Kristina 
Cerniglia joined our Board of Directors in December 2018, bringing over 30 years of financial experience 
with public companies. Further, I would like to recognize Ronald Schubel who will be retiring from our Board 
at  the  2019  Annual  Meeting  after  nearly  17  years  of  outstanding  service,  guidance  and  contributions. 
Continued diversification is top of mind as new directors are appointed to our Board in the future. 

In closing, thanks to our shareholders for your ongoing support of our company and the confidence you put 
forth in us as we continue to execute our growth strategy. 

Dave Heinzmann 
President and Chief Executive Officer 

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT 
OF 1995 (“PSLRA”) - The statements contained in the letter to shareholders and the other sections of this report and in the Company’s Annual Report 
on Form 10-K that are not historical facts are intended to constitute “forward-looking statements” entitled to the safe-harbor provisions of the PSLRA. 
These statements may involve risks and uncertainties, including, but not limited to, risks relating to 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, 
integration of acquisitions, uncertainties related to political and regulatory changes and other risks that may be detailed in “Item 1A, Risk Factors” in the 
Form 10-K and in the Company’s other Securities and Exchange Commission filings. 

A reconciliation of these non-GAAP financial measures to the most directly comparable financial measure calculated and presented in accordance with 
GAAP is set forth on the following page: 
1Organic sales growth is reported revenue less the impact of acquisitions, divestitures and foreign exchange from one year compared to a prior year. 
2Adjusted  diluted  EPS  excludes  acquisition-related  and  integration  costs,  restructuring,  impairment  and  other  charges,  certain  purchase  accounting 
adjustments and non-operating foreign exchange loss (gain), as applicable. 
3Free cash flow is calculated as cash from operating activities less capital expenditures. 

LITTELFUSE, INC.
GAAP TO NON-GAAP RECONCILIATION
(In millions of USD except per share amounts unaudited)

Non-GAAP EPS reconciliation

GAAP diluted EPS

EPS impact of Non-GAAP adjustments (below)

Adjusted diluted EPS

Non-GAAP adjustments - (income)/expense

Acquisition related and integration costs

Restructuring, impairment and other charges

Amortization backlog - IXYS

Change in control - IXYS

Acquisition related stock-based compensation charge

Purchase accounting inventory adjustments

Non-GAAP adjustments to operating income

Other expense, net

Non-operating foreign exchange loss (gain)

Non-GAAP adjustments to income before income taxes

Income taxes

Non-GAAP adjustments to net income

Total EPS impact

Net sales reconciliation

Net sales growth

Less:

Acquisitions

Divestitures

FX impact

Organic net sales growth

Net sales reconciliation

Net sales growth

Less:

Acquisitions

Divestitures

FX impact

Organic net sales growth

Free cash flow reconciliation

Net cash provided by operating activities

Less: Purchases of property, plant and equipment

Free cash flow

2018

2017

$

$

6.52

2.92

9.44

$

$

2018

2017

$

20.2

$

12.6

12.4

2.1

4.5

36.9

88.7

0.9

(0.9)

88.7

15.1

73.6

2.92

$

$

$

$

2018 vs. 2017

5.21

2.53

7.74

8.1

2.2

—

—

—

—

10.3

—

2.4

12.7

(45.3)

58.0

2.53

Electronics

Automotive

Industrial

Total

70%

58%

—

1%

11%

6%

—

—

2%

4%

8 %

41 %

—

(6)%

1 %

13 %

32 %

(1)%

2 %

8 %

Electronics

Automotive

Industrial

Total

2017 vs. 2016

24%

14%

—

—%

10%

9%

5%

—

—%

4%

$

$

1 %

16 %

—

(7)%

1 %

7 %

9 %

(1)%

1 %

7 %

2018

2017

331.8

(74.8)

257.0

$

$

269.2

(65.9)

203.3

NON-GAAP FINANCIAL MEASURES
The information included in the letter to shareholders includes the non-GAAP financial measures of adjusted diluted earnings per share and organic net sales growth. 
These non-GAAP financial measures exclude the effect of certain expenses and income not related directly to the underlying performance of our fundamental business 
operations. The company believes that adjusted diluted earnings per share and organic net sales growth provide useful information to investors regarding its operational 
performance because they enhance an investor’s overall understanding of our core financial performance and facilitate comparisons to historical results of operations, 
by excluding items that are not related directly to the underlying performance of our fundamental business operations or historical business operations. The letter to 
shareholders  also  includes  the  non-GAAP measure  of  free  cash  flow. The  company  believes  free  cash  flow  is  a  useful  measure  of  its  ability  to  generate  cash. A 
reconciliation of these non-GAAP financial measures to the most directly comparable GAAP financial measures is included herein. The company believes that these 
non-GAAP financial measures are commonly used by financial analysts and others in the industries in which we operate, and thus further provide useful information to 
investors. Management additionally uses these measures when assessing the performance of the business and for business planning purposes. Note that our definitions 
of these non-GAAP financial measures may differ from those terms as defined or used by other companies.

United States
Securities and Exchange Commission
Washington, D.C. 20549 
FORM 10-K 

Annual Report Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

for the fiscal year ended December 29, 2018

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)

(Mark one)

[X]

[   ]

Delaware

(State or other jurisdiction of

incorporation or organization)

8755 West Higgins Road, Suite 500

Chicago, Illinois

(Address of principal executive offices)

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

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

Title of Each Class

Common Stock, $0.01 par value 

36-3795742

(I.R.S. Employer Identification No.)

60631

(ZIP Code)

Name of Each Exchange

On Which Registered
NASDAQ Global Select MarketSM

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes [X] No [ ] 

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes [ ] No [X] 

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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of 
registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-
K. [ ]

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

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

The aggregate market value of 24,414,037 shares of voting stock held by non-affiliates of the registrant was approximately $4,409,178,694 based on the last 
reported sale price of the registrant’s Common Stock as reported on the NASDAQ Global Select MarketSM on June 30, 2018.

As of February 18, 2019, the registrant had outstanding 24,706,335 shares of Common Stock, net of Treasury Shares.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Littelfuse, Inc. Proxy Statement for the 2018 Annual Meeting of Stockholders (the “Proxy Statement”) are incorporated by reference into Part III 

of this Form 10-K. 

1

TABLE OF CONTENTS

FORWARD-LOOKING STATEMENTS

PART I
Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

PART II
Item 5.

Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.
Item 16.

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 
Securities
Selected Financial Data
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

Exhibits, Financial Statement Schedules.
Form 10-K Summary

Schedule II – Valuation and Qualifying Accounts and Reserves
Signatures
Exhibit Index

Page

3

3
9
14
14
14
14

15

17
17
34
35
82
82
83

84
85
86
86
86

87
87
88
89
90

2

FORWARD-LOOKING STATEMENTS

Certain statements contained in this Annual Report on Form 10-K that are not historical facts are intended to constitute “forward-
looking statements” entitled to the safe-harbor provisions of the Private Securities Litigation Reform Act of 1995 (“PSRLA”). 
These statements may involve risks and uncertainties, including, but not limited to, risks relating to 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 and 
regulatory changes; integration of acquisitions including the integration of the recently acquired business of IXYS Corporation 
(“IXYS”) and the risk that expected benefits, synergies and growth prospects of the acquisition of IXYS may not be achieved in 
a timely manner, or at all; and other risks that may be detailed in “Item 1A. Risk Factors” below and in the company’s other 
Securities and Exchange Commission filings.

AVAILABLE INFORMATION

The Company is subject to the reporting and information requirements of the Securities Exchange Act of 1934, as amended and 
as a result, are obligated to file annual, quarterly, and current reports, proxy statements, and other information with the United 
States Securities and Exchange Commission (“SEC”). The Company makes these filings available free of charge on its website 
(http://www.littelfuse.com) as soon as reasonably practicable after it electronically files them with, or furnish them to, the SEC. 
Information on the Company’s website does not constitute part of this Annual Report on Form 10-K. In addition, the SEC maintains 
a  website  (http://www.sec.gov)  that  contains  the  Company’s  annual,  quarterly,  and  current  reports,  proxy  and  information 
statements, and other information the Company electronically files with, or furnishes to, the SEC. The Company’s website and 
the information contained therein or connected thereto are not incorporated into this Annual Report on Form 10-K.

ITEM 1. BUSINESS.

GENERAL

PART I

Littelfuse, Inc., was incorporated under the laws of the State of Delaware in 1991. References herein to the “Company,” “we,” 
“our” or “Littelfuse” refer to Littelfuse, Inc. and its subsidiaries. References herein to “2018”, “fiscal 2018” or “fiscal year 2018” 
refer to the fiscal year ended December 29, 2018. References herein to “2017”, “fiscal 2017” or “fiscal year 2017” refer to the 
fiscal year ended December 30, 2017. References herein to “2016”, “fiscal 2016” or “fiscal year 2016” refer to the fiscal year 
ended December 31, 2016. The Company operates on a 52-53 week fiscal year (4-4-5 basis) ending on the Saturday closest to 
December 31.

OVERVIEW

Founded in 1927, Littelfuse is a global manufacturer of leading technologies in circuit protection, power control and sensing. Sold 
in over 150 countries, the Company’s products are found in automotive and commercial vehicles, industrial applications, data and 
telecommunications,  medical  devices,  consumer  electronics  and  appliances.  With  its  broad  product  portfolio  of  fuses, 
semiconductors, polymers, ceramics, relays and sensors, and extensive global infrastructure, the Company’s worldwide associates 
partner with its customers to design, manufacture and deliver innovative, high-quality solutions for a safer, greener and increasingly 
connected world.

Segments

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 for circuit protection, power control and sensing 
 products throughout the world. The circuit protection products protect against electrostatic discharge, power surges, short circuits, 
voltage spikes and other harmful occurrences; our power control products safely and efficiently control power to mitigate equipment 
damage, minimize electrical hazards and improve productivity and our sensor products are used to identify and detect temperature, 
proximity, flow speed and fluid level in various applications. For segment and geographical information and consolidated net sales 
and operating income see Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations and 
Note 16, Segment Information, of the Notes to Consolidated Financial Statements included in this Annual Report.

•

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,

3

reed switch based magnetic sensing, gas discharge tubes; semiconductor and power semiconductor products such as 
discrete  transient  voltage  suppressor  (“TVS”)  diodes, TVS  diode  arrays,  protection  and  switching  thyristors,  silicon 
carbide, 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 and 
automotive  electronics,  electric  vehicle  infrastructure,  data  and  telecommunications,  medical  devices,  LED  lighting, 
consumer electronics and appliances.

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 industries. Passenger car
fuse products include fuses and fuse accessories for internal combustion engine vehicles and 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 for the commercial vehicle industry.
Automotive sensor products include a wide range of automotive and commercial vehicle products designed to monitor
the passenger compartment occupants, safety and environment as well as the vehicle’s powertrain, emissions, speed and
suspension.

Industrial Segment: Consists of power fuses, protection relays and controls and other circuit protection products for use
in various industrial applications such as oil, gas, mining, alternative energy - solar and wind, electric vehicle infrastructure,
construction, HVAC systems, elevator and other industrial equipment.

•

•

Strategy

In December 2016, the Company announced its five-year strategic plan. Building upon its achievements from its previous five-
year plan and leveraging the global mega trends of safety, energy efficiency and the connected world, the Company is targeting 
an average annual accelerated organic growth of 5-7 percent and growth from strategic acquisitions of 5-7 percent. The Company’s 
strategic goals include growing its circuit protection platform, accelerating growth in its power control platform and doubling its 
sensor platform. The Company expects to do this through content and share gains, targeting underpenetrated geographies and 
markets, leveraging investments in its people, innovations and operating systems, and capitalizing on growth opportunities where 
technologies and applications are converging across its segments, while continuing to acquire and integrate businesses that fit its 
strategic focus areas.

Recent Acquisitions 

•

•

IXYS Corporation: On January 17, 2018, the Company acquired IXYS, a global pioneer in the power semiconductor and
integrated  circuit  markets  with  a  focus  on  medium  to  high  voltage  power  semiconductors  across  the  industrial,
communications, consumer and medical markets. IXYS has a broad customer base, serving more than 3,500 customers
through its direct sales force and global distribution partners. The purchase price for IXYS was $856.5 million, which
included consideration of cash, Littelfuse common stock, and the value of converted, or cash settled IXYS equity awards.
The operations of IXYS are included in the Electronics segment.

U.S. Sensor: On July 7, 2017, the Company acquired the assets of U.S. Sensor Corporation (“U.S. Sensor”) for $24.3
million.  U.S.  Sensor  manufactures  a  variety  of  high  quality  negative  temperature  coefficient  thermistor  probes  and
assemblies. The acquisition expands the Company’s existing sensor portfolio in several key electronics and industrial
end markets. The operations of U.S. Sensor are included in the Electronics segment.

• Monolith Semiconductor Inc.: On February 28, 2017, pursuant to a Securities Purchase Agreement between the Company
and the stockholders of Monolith Semiconductor Inc. (“Monolith”), a U.S. start-up Company developing silicon carbide
technology,  the  Company  increased  its  investment  in  Monolith  by  acquiring  approximately  62%  of  the  outstanding
common stock of Monolith for $15.0 million. During 2018, the Company acquired the remaining outstanding stock of
Monolith for $9.0 million based on Monolith meeting certain technical and sales targets, and now owns 100% of Monolith.
The operations of Monolith are included in the Electronics segment.

•

ON Portfolio: On August 29, 2016, the Company acquired certain assets of select businesses (the “ON Portfolio”) of ON
Semiconductor Corporation for $104.0 million. The acquired business, which is included in the Electronics segment,
consists of a product portfolio that includes transient voltage suppression (“TVS”) diodes, switching thyristors, and IGBTs
for  automotive  ignition  applications.  The  acquisition  expands  the  Company’s  offerings  in  power  semiconductor
applications as well as increases its presence in the automotive electronics market. The ON Portfolio products have strong

4

synergies with the Company’s existing circuit protection business, will strengthen its channel partnerships and customer 
engagement, and expand its power semiconductor portfolio.

• Menber’s: On April 4, 2016, the Company completed the acquisition of Menber’s S.p.A. (“Menber’s”) headquartered in
Legnago, Italy for $19.2 million (net of cash acquired and after settlement of a working capital adjustment). The acquired
business is part of the Company's commercial vehicle product business within the Automotive segment and specializes
in  the  design,  manufacturing,  and  selling  of  manual  and  electrical  high  current  switches  and  trailer  connectors  for
commercial vehicles. The transaction expands the Company’s commercial vehicle products business globally.

•

PolySwitch: On March 25, 2016, the Company acquired 100% of the circuit protection business (“PolySwitch”) of TE
Connectivity Ltd. for $348.3 million (net of cash acquired and after settlement of certain post-closing adjustments). The
PolySwitch business, which is split between the Automotive and Electronics segments, has a leading position in polymer
based  resettable  circuit  protection  devices,  with  a  strong  global  presence  in  the  automotive,  battery,  industrial,
communications and mobile computing markets. PolySwitch has manufacturing facilities in Shanghai and Kunshan,
China,  and  Tsukuba,  Japan.  The  acquisition  allows  the  Company  to  strengthen  its  global  circuit  protection  product
portfolio, as well as expands its presence in the automotive electronics and battery protection end markets. The acquisition
also significantly increases the Company’s presence in Japan.

Sales and Operations

The Company operates in three geographic regions: Asia-Pacific, the Americas, and Europe. The Company manufactures products 
and sells to customers in all three regions.

Net sales by segment for the periods indicated are as follows:

(in millions)
Electronics
Automotive
Industrial
Total

2018

1,124.3
479.8
114.4
1,718.5

$

$

$

$

Fiscal Year
2017

661.9
453.2
106.4
1,221.5

Net sales in the Company’s three geographic regions, based upon the shipped-to destination, are as follows:

(in millions)
Asia-Pacific
Americas
Europe

Total

2018

753.3
578.6
386.6
1,718.5

$

$

$

$

Fiscal Year
2017

541.1
436.5
243.9
1,221.5

2016

535.2
415.2
105.8
1,056.2

2016

444.8
411.1
200.3
1,056.2

$

$

$

$

The Company’s products are sold worldwide through distributors, a direct sales force and manufacturers’ representatives in certain 
regions. For the fiscal year 2018, approximately 70% of the Company’s net sales were to customers outside the United States 
(“U.S.”), including approximately 27% to China.

The Company manufactures many of its products on fully integrated manufacturing and assembly equipment. The Company 
maintains  product  quality  through  a  Global  Quality  Management  System  with  most  manufacturing  sites  certified  under  ISO 
9001:2000. In addition, several of the Littelfuse manufacturing sites are also certified under IATF 16949 and ISO 14001.

Additional information regarding the Company’s sales by geographic area and long-lived assets in different geographic areas is 
in Note 16, Segment Information, of the Notes to Consolidated Financial Statements included in this Annual Report.

5

BUSINESS ENVIRONMENT

Electronics Segment

The Company designs, develops and manufactures a wide range of components and modules that provide circuit protection, power 
control and sensing for a multitude of electronic and industrial applications. Circuit protection technologies in the Electronics 
Segment are designed to protect against harmful occurrences like voltage spikes, short circuits, power surges and electrostatic 
discharge. Products include a vast array of fuses and other circuit protection technologies used in a variety of electronic products 
including consumer electronics, automotive electronics, IT and telecommunications equipment, medical devices, lighting products, 
and white goods.

The Company also offers a wide range of power control products used to convert and regulate energy and safely and efficiently 
control power across a broad spectrum of applications including industrial and automotive power systems, motor drives and power 
conversion applications. Products include a comprehensive portfolio of semiconductor components including thyristors, rectifiers 
and fast recovery diodes, IGBTs and wide band gap devices. The acquisition of IXYS is expected to accelerate the Company’s 
growth across the power control market driven by IXYS’s extensive power semiconductor portfolio in medium and high-power 
applications and technology expertise. The Company expects to continue to diversify and expand its presence within industrial 
electronics markets, leveraging the strong IXYS industrial OEM customer base. The Company also expects to increase long-term 
penetration of its power semiconductor portfolio in automotive markets, expanding its global content per vehicle.

Another strategic area of focus in the Electronics Segment is the Company’s continued investment in silicon carbide, a promising 
semiconductor  material  that  enables  more  efficient  power  conversion  than  traditional  silicon-based  devices.  In  October,  the 
Company completed the acquisition of Monolith and now owns 100% of the company. The Monolith silicon carbide technology 
provides a very broad portfolio of products to address the medium- to high-end side of the growing power semiconductor electronics 
market.

As products become increasingly sophisticated, smarter and more connected, the need for complex sensor technologies continues 
to grow. Sensors products in the Electronics Segment are used in a wide variety of applications including appliances, security 
systems, medical equipment, and consumer and industrial controls.

Automotive Segment

The Company is a primary supplier of fuses and circuit protection technologies to global automotive OEMs, through sales made 
to Tier One automotive suppliers, main-fuse box, and wire harness manufacturers that incorporate the fuses into their products, 
as well as automotive component parts manufacturers, and automotive parts distributors. The Company also sells its fuses in the 
replacement parts market, with its products being sold through merchandisers, discount stores, and service stations, as well as 
under private label by national firms.

Circuit protection needs in the automotive space are expected to generate additional content-per-vehicle exceeding global auto 
production, with the increased electronification of vehicles, as well as the continued electrification of vehicles with the development 
and market penetration of hybrid and electric vehicles.

Over the past several years, the Company has expanded the Automotive segment into the commercial vehicle market with various 
acquisitions, also expanding the Company’s portfolio of power control products. Additional products in this market include:  power 
distribution modules, low and high current switches, solenoids and relays, battery management products, ignition key switches, 
and trailer connectors. Custom and market products are sold directly to a mix of OEMs, Tier One suppliers, aftermarket channels, 
as well as through general distribution.

The Company also continues to expand its automotive sensor business and products and expects this market to provide future 
long-term growth opportunities. Products sold into the market include a wide range of automotive and commercial vehicle sensors 
designed to monitor the passenger compartment occupants, safety and environment as well as the vehicle’s powertrain, emissions, 
speed and suspension. A majority of the Company’s automotive sensor sales are made to Tier One suppliers.

Industrial Segment

The Company manufactures and sells a broad range of low-voltage and medium-voltage circuit protection products to electrical 
distributors and their customers in the construction, OEM and industrial maintenance, repair and operating supplies (“MRO”) 
markets. The Company also designs and manufactures protection relays for the global oil, gas and mining, and general industrial 

6

markets. The Company sees growth opportunities by expanding both the end markets it serves and channel partnerships, as well 
as continuing to invest in new product development.

Power fuses are used to protect circuits in various types of industrial equipment and in industrial and commercial buildings. 
Protection relays are used to protect personnel and equipment in harsh environments such as oil, gas and mining, and industrial 
environments from excessive currents, over voltages, and electrical shock hazards called ground faults. Major applications for 
protection relays include protection of motor, transformer, and power-line distribution circuits. Ground-fault relays are used to 
protect personnel and equipment in wet environments such as underground mining or water treatment applications where there is 
a greater risk for electricity to come in contact with water and create a shock hazard.

PRODUCT DESIGN AND DEVELOPMENT

The Company employs scientific, engineering, and other personnel to continually improve its existing product lines and to develop 
new products at its research, product design, and development (“R&D”) and engineering facilities with primary locations in  China, 
Germany, Italy, Japan, Lithuania, Mexico, Philippines, Taiwan, United Kingdom, and the United States. The Company maintains 
a staff of engineers, chemists, material scientists and technicians whose  primary responsibility is to design and develop new 
products.

Proposals for the development of new products are initiated primarily by sales, marketing, and product management personnel 
with input from customers. The entire product development process usually ranges from a few months to a few years based on 
the complexity of development, with continuous efforts to reduce the development cycle. During fiscal years 2018, 2017, and 
2016, the Company expended $87.3 million, $50.5 million, and $42.2 million, respectively, on R&D.

PATENTS, TRADEMARKS, AND OTHER INTELLECTUAL PROPERTY

The Company generally relies on patents, trademarks, licenses, and nondisclosure agreements to protect its intellectual property 
and proprietary products. In cases where it is deemed necessary by management, key employees are required to sign an agreement 
that they will maintain the confidentiality of the Company’s proprietary information and trade secrets.

The Company owns a large portfolio of patents worldwide and new products are continually being developed to replace older 
products. The Company regularly applies for patent protection on such new products. While, in the aggregate, the Company’s 
patents are important in the operation of its businesses, the Company believes that the loss by expiration or otherwise of any one 
patent or group of patents would not materially affect its business.

MANUFACTURING

The Company’s manufacturing facilities are in China, Germany, Italy, Japan, Lithuania, Mexico, Philippines, Portugal, the United 
Kingdom, and the United States. The Company performs the majority of its own fabrication and maintains in-house capabilities 
for metal stamping, surface mount assembly, plating (silver, nickel, zinc, and oxides) and thermoplastic molding. In addition, the 
Company fabricates semiconductor wafers for certain applications and maintains in-house capability for epitaxy fabrication, die 
attach, and wafer probe testing. After sub-components are readied for assembly, final assembly is accomplished on fully automatic 
and semi-automatic assembly machines. Quality assurance and operations personnel, using techniques such as statistical process 
control, perform tests, checks and measurements during the production process to maintain the highest levels of product quality, 
including  safety  and  reliability,  and  customer  satisfaction. Additionally,  the  Company  utilizes  external  wafer  foundries  and 
subcontracted test and assembly facilities for a portion of its semiconductor business.

The principal raw materials for the Company’s products include copper and copper alloys, heat-resistant plastics, zinc, melamine, 
glass, silver, gold, raw silicon, solder, and various gases. The Company uses a single source for several heat-resistant plastics and 
for zinc but has specifically identified capable alternative heat-resistant plastics and zinc sources. All other raw materials are 
purchased from a number of readily available outside sources.

MARKETING

The Company goes to market through a worldwide selling organization consisting of direct sales personnel, distribution partners 
and  manufacturers’  representatives. The  direct  sales  force  closely  works  with  global  OEM, Tier  One  automotive,  consulting 
engineers, and major end user customers to design-in and sell the Company’s circuit protection, power control and sensing products. 
The distributors provide fulfillment for a majority of customers including those partnered with electronic manufacturing services 
(EMS). The direct sales force is supplemented with manufacturers’ representatives. The Company has sales offices and direct sales 
channels in all major regions of the world.

7

Electronics Segment

Most Electronics segment products are sold through distribution partners, including global distributors such as Arrow Electronics, 
Inc., Future Electronics and TTI, Inc, and regional and high service distributors.   Many of our products are incorporated into 
applications with complex design technical support requirements.  These may be sold through our direct salesforce and fulfilled 
through our distribution partners.  The Company is leveraging IXYS sales channels to continue growing OEM sales and customer 
relationships, and well as driving opportunities to cross-sell products.  

Automotive Segment

The Company maintains a direct sales force to service all of the major automotive and commercial vehicle OEMs, system suppliers, 
and Tier One automotive and aftermarket customers globally.

The Company also leverages its automotive customer relationships to sell products from the Electronics segment into automotive 
end markets, primarily to Tier One automotive customers. These revenues are reported in the Electronics segment.

Industrial Segment

The Company markets and sells its power fuses and protection relays through a direct sales force, manufacturers’ representatives, 
and electronics, industrial and electrical distributors, primarily across North America. The electrical and industrial distribution 
network  is  comprised  of  over  2,500  distributor  branch  locations.  These  distributors  have  customers  that  include  electrical 
contractors, municipalities, utilities and factories.  

CUSTOMERS

The Company sells to nearly 7,000 customers and distributors worldwide. Sales to Arrow Electronics, Inc., which were reported 
in  our  Electronics, Automotive  and  Industrial  segments  were  10.7%  and  10.6%  of  consolidated  net  sales  in  2018  and  2017, 
respectively, but less than 10% in 2016. No other single customer accounted for more than 10% of net sales during any of the last 
three years. During fiscal 2018, 2017, and 2016, net sales to customers outside the U.S. accounted for approximately 70%, 69%, 
and 66%, respectively, of the Company’s total net sales.

COMPETITION

The Company’s products compete with similar products of other manufacturers, some of which may have substantially greater 
financial resources than the Company. In the Electronics segment, the Company’s competitors include Eaton Corporation, Bel 
Fuse  Inc.,  Bourns  Inc.,  EPCOS,  ON  Semiconductor  Corporation,  Infineon  Technologies,  STMicroelectronics  NV,  Semtech 
Corporation, and Vishay Intertechnology Inc. In the Automotive segment, the Company’s competitors include Eaton Corporation, 
Pacific Engineering, MTA, CTS Corporation, Amphenol Corporation, Sensata Technologies Holding NV, and TE Connectivity 
Ltd.  In  the  Industrial  segment,  the  Company’s  major  competitors  include  Eaton  Corporation,  GE  Multilin,  and  Mersen. The 
Company believes that it competes on the basis of innovative products, the breadth of its product line, the quality and design of 
its products, and the responsiveness of its customer service, in addition to price.

BACKLOG

The  backlog  of  unfilled  orders  at  December 29,  2018  was  approximately  $405.7  million,  compared  to  $676.1  million  at 
December 30,  2017  with  the  decrease  primarily  driven  by  the Automotive  segment,  partially  offset  by  an  increase  from  the 
Electronics segment. Substantially all the orders currently in backlog are scheduled for delivery in 2019.

EMPLOYEES

As  of  December 29,  2018,  the  Company  employed  approximately  12,300  employees  worldwide. Approximately  20%  of  the 
Company's total workforce was employed under collective bargaining agreements at December 29, 2018. In Mexico, the Company 
has two separate collective bargaining agreements, one for 1,500 employees in Piedras Negras, expiring January 31, 2020 and the 
second for 650 employees in Matamoros, expiring January 1, 2020. In Germany, the Company has collective bargaining agreements 
with approximately 340 employees in Lampertheim and Essen, expiring March 31, 2020. In the United Kingdom, the Company 
has  a  collective  bargaining  agreement  with  some  of  the  employees  in  Chippenham.  Overall,  the  Company  has  historically 
maintained satisfactory employee relations and considers employee relations to be good.

8

ENVIRONMENTAL REGULATION

The Company is subject to numerous foreign, federal, state, and local regulations relating to air and water quality, the disposal of 
hazardous waste materials, safety and health. Compliance with applicable environmental regulations has not significantly changed 
the Company’s competitive position, capital spending or earnings in the past and the Company does not presently anticipate that 
compliance with such regulations will change its competitive position, capital spending or earnings for the foreseeable future.

The Company employs chemical engineers to monitor regulatory matters and believes that it is currently in compliance in all 
material respects with applicable environmental laws and regulations.

Littelfuse GmbH, which was acquired by the Company in May 2004, is responsible for maintaining closed coal mines in Germany 
from legacy operations. The Company is compliant with German regulations pertaining to the maintenance of the mines and has 
an accrual related to certain of these coal mine shafts based on an engineering study estimating the cost of remediating the dangers 
(such as a shaft collapse) of certain of these closed coal mine shafts in Germany. The accrual is reviewed annually and calculated 
based upon the estimated costs of remediating the shafts. Further information regarding the coal mine liability accrual is provided 
in Note 1, Summary of Significant Accounting Policies and Other Information, of the Notes to Consolidated Financial Statements 
included in this Annual Report.

ITEM 1A. RISK FACTORS.

The Company’s business, financial condition, and results of operations are subject to various risks and uncertainties, including 
the risk factors it has identified below. Any of the following risk factors could materially and adversely affect the Company’s 
business, financial condition, or results of operations. These factors are not necessarily listed in order of importance.

The Company’s industry is subject to intense competitive pressures.

The Company operates in markets that are highly competitive. The Company competes on the basis of price, product performance 
and quality, service, and / or brand name across the industries and markets it serves. Competitive pressures could affect the prices 
the Company is able to charge its customers or demand for its products.

The Company may not always be able to compete on price, particularly when compared to manufacturers with lower cost structures. 
Some of the Company’s competitors have substantially greater sales, financial and manufacturing resources and may have greater 
access to capital than the Company. As other companies enter its markets or develop new products, competition may further 
intensify. The Company’s failure to compete effectively could materially adversely affect its business, financial condition, and 
results of operations.

The Company engages in strategic acquisitions and may not realize the anticipated benefits of the acquisitions and / or may 
encounter difficulties in integrating these businesses.

The Company seeks to grow through strategic acquisitions. In the past, the Company has acquired a number of businesses or 
companies and additional product lines and assets. The Company intends to continue to expand and diversify its operations with 
additional future acquisitions.

An acquired business, technology, service or product could under-perform relative to the Company’s expectations and the price 
paid for it, or not perform in accordance with the Company’s anticipated timetable. This could cause the Company’s financial 
results to differ from expectations in any given fiscal period, or over the long term. The success of these transactions also depends 
on the Company’s ability to integrate the assets, operations, and personnel associated with these acquisitions. The Company may 
encounter difficulties in integrating acquisitions with the Company’s operations and may not realize the degree or timing of the 
benefits that are anticipated from an acquisition.

The Company may also discover liabilities or deficiencies associated with the companies or assets it acquires that were not identified 
in advance, which may result in significant unanticipated costs. The effectiveness of the Company’s due diligence review and its 
ability to evaluate the results of such due diligence are dependent upon the accuracy and completeness of statements and disclosures 
made or actions taken by the companies acquired or their representatives, as well as the limited amount of time in which acquisitions 
are executed. In addition, the Company may fail to accurately forecast the financial impact of an acquisition transaction, including 
tax and accounting charges. Acquisitions may also result in recording of significant additional expenses to the results of operations 
and recording of substantial intangible assets on the balance sheet upon closing. Any of these factors may adversely affect the 
Company’s financial condition and results of operations.

9

Reorganization activities may lead to additional costs and material adverse effects.

In the past, the Company has taken actions to restructure and optimize its production and manufacturing capabilities and efficiencies 
through relocations, consolidations, plant closings or asset sales. In the future, the Company may take additional restructuring 
actions including the consolidating, closing or selling of additional facilities. These actions could result in impairment charges 
and various charges for such items as idle capacity, disposition costs and severance costs, in addition to normal or attendant risks 
and uncertainties. The Company may be unsuccessful in any of its current or future efforts to restructure or consolidate its business. 
Plans to minimize or eliminate any loss of revenues during restructuring or consolidation may not be achieved. These activities 
may have a material adverse effect upon the Company’s business, financial condition and results of operations.

The Company may be unable to manufacture and deliver products in a manner that is responsive to its customers’ needs.

The end markets for the Company’s products are characterized by technological change, frequent new product introductions and 
enhancements, changes in customer requirements and emerging industry standards. The introduction of products embodying new 
technologies and the emergence of new industry standards could render its existing products obsolete and unmarketable before it 
can recover any or all of its research, development, and commercialization expenses on capital investments. Furthermore, the life 
cycles of its products may change and are difficult to estimate.

The Company’s future success will depend upon its ability to manufacture and deliver products in a manner that is responsive to 
its customers’ needs. The Company will need to develop and introduce new products and product enhancements on a timely basis 
that  keep  pace  with  technological  developments  and  emerging  industry  standards  and  address  increasingly  sophisticated 
requirements of its customers. The Company invests heavily in research and development without knowing that it will recover 
these costs. The Company’s competitors may develop products or technologies that will render its products non-competitive or 
obsolete. If it cannot develop and market new products or product enhancements in a timely and cost-effective manner, its business, 
financial condition and results of operations could be materially adversely affected.

The Company’s ability to manage currency or commodity price fluctuations or supply shortages is limited.

As a resource-intensive manufacturing operation, the Company is exposed to a variety of market and asset risks, including the 
effects of changes in commodity prices, foreign currency exchange rates, and interest rates. The Company has multiple sources 
of supply for the majority of its commodity requirements. However, significant shortages that disrupt the supply of raw materials 
or result in price increases could affect prices the Company charges its customers, its product costs, and the competitive position 
of its products and services. The Company monitors and manages these exposures as an integral part of its overall risk management 
program,  which  recognizes  the  unpredictability  of  markets  and  seeks  to  reduce  the  potentially  adverse  effects  on  its  results. 
Nevertheless, changes in currency exchange rates, commodity prices and interest rates cannot always be predicted. In addition, 
because of intense price competition and the Company’s high level of fixed costs, it may not be able to address such changes even 
if they are foreseeable. Substantial changes in these rates and prices could have a material adverse effect on the Company’s results 
of operations and financial condition. In addition, significant portions of its revenues and earnings are exposed to changes in 
foreign currency rates. As it operates in multiple foreign currencies, changes in those currencies relative to the U.S. dollar will 
impact its revenues and expenses. The impact of possible currency devaluation in countries experiencing high inflation rates or 
significant exchange fluctuations can impact the Company’s results and financial guidance. For additional discussion of interest 
rate, currency or commodity price risk, see Item 7A, Quantitative and Qualitative Disclosures about Market Risk.

The Company’s effective tax rate could materially increase as a consequence of various factors, including interpretations 
and administrative guidance in regard to the Tax Act (defined below), U.S. and/or international tax legislation, mix of the 
Company’s earnings by jurisdiction, and U.S. and non-U.S. jurisdictional tax audits.

On December 22, 2017, the U.S. enacted legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). Although 
certain administrative guidance has been issued, the appropriate application of many provisions of the Tax Act remain uncertain. 
As discussed more fully in Note 14, Income Taxes, of the Notes to Consolidated Financial Statements included in this Annual 
Report, adjustments to income tax expense may be necessary in future periods if provisions of the Tax Act, and their interaction 
with other provisions of the U.S. Internal Revenue Code, are interpreted differently than interpretations made by the Company, 
whether through issuance of additional administrative guidance, or through further review of the Tax Act by the Company and its 
advisors. Such adjustments could have a material adverse effect on the Company’s effective tax rate and cash flows.

 The Company is subject to taxes in the U.S. and numerous non-U.S. jurisdictions. Therefore, it is subject to changes in tax laws 
in each of these jurisdictions. The Company’s income tax rate in certain non-U.S. jurisdictions is substantially lower than the U.S. 
statutory tax rate. Legislative proposals have been made from time to time to reduce these tax benefits, in some cases with the tax 
increase phased in over a multi-year transition period. In addition, certain non-U.S. jurisdictions are considering tax legislation 

10

based upon recommendations made by the Organization for Economic Co-operation and Development in connection with its Base 
Erosion and Profit Shifting study. The outcome of these and other legislative developments could have a material adverse effect 
on the Company’s effective tax rate and cash flows.

The tax rates applicable in the jurisdictions within which the Company operates vary widely. Therefore, the Company’s effective 
tax rate may be adversely affected by changes in the mix of its earnings by jurisdiction.

The Company’s tax returns are subject to examination by various U.S. and non-U.S. tax authorities, including the U.S. Internal 
Revenue Service. The Company regularly assesses the likelihood of an adverse outcome resulting from these examinations to 
determine  the  adequacy  of  its  provision  for  income  taxes.  However,  there  can  be  no  assurance  as  to  the  outcome  of  these 
examinations. 

Changes in U.S. trade policy, including the imposition of tariffs and the resulting consequences, may have a material adverse 
impact on our business and results of operations.

The U.S. government has adopted a new approach to trade policy and in some cases to renegotiate, or potentially terminate, certain 
existing bilateral or multi-lateral trade agreements. It has also imposed tariffs on certain foreign goods and products. These measures 
may materially increase costs for goods imported into the United States. This in turn could require us to materially increase prices 
to our customers which may reduce demand, or, if we do not or are unable to increase prices, could result in lower margins on 
products sold. Changes in U.S. trade policy have resulted in, and could result in more, U.S. trading partners adopting responsive 
trade policies making it more difficult or costly for us to export our products to those countries.

A decline in expected profitability of the Company or individual reporting units of the Company could result in the impairment 
of assets, including goodwill and other long-lived assets.

The Company holds material amounts of goodwill and other long-lived assets on its balance sheet. A decline in expected profitability, 
particularly if there is a decline in the global economy, could call into question the recoverability of the Company’s related goodwill 
and other long-lived tangible and intangible assets and require the write down or write off of these assets. Such an occurrence has 
had and could continue to have a material adverse effect on the Company’s consolidated results of operations, financial position 
and cash flows.

A significant fluctuation between the U.S. dollar and other currencies could adversely impact the Company's revenue and 
earnings.

Although  the  Company's  financial  results  are  reported  in  U.S.  dollars,  the  majority  of  the  Company’s  operations  consist  of 
manufacturing and sales activities in foreign countries. The Company’s most significant net long exposure is to the euro. The 
Company’s most significant net short exposures are to the Chinese renminbi, Mexican peso, and Philippine peso. Changes in 
foreign exchange rates could have an adverse effect on the Company's results of operations, financial position and cash flows.

The Company’s revenues may vary significantly from period to period.

The Company’s revenues may vary significantly from one accounting period to another due to a variety of factors including:

•
•
•
•
•
•
•
•
•
•
•
•

changes in customers’ buying decisions;
changes in demand for its products;
changes in its distributor inventory stocking;
the Company’s product mix;
the Company’s effectiveness in managing manufacturing processes;
costs and timing of its component purchases;
the effectiveness of its inventory control;
the degree to which it is able to utilize its available manufacturing capacity;
the Company’s ability to meet delivery schedules;
general economic and industry conditions;
local conditions and events that may affect its production volumes, such as labor conditions and political instability; and
seasonality of certain product lines.

The bankruptcy or insolvency of a major customer could adversely affect the Company.

The bankruptcy or insolvency of a major customer could result in lower sales revenue and cause a material adverse effect on the 
Company’s business, financial condition, and results of operations. In addition, the bankruptcy or insolvency of a major auto 
11

manufacturer or significant supplier likely could lead to substantial disruptions in the automotive supply base, resulting in lower 
demand for the Company’s products, which likely would cause a decrease in sales revenue and have a substantial adverse impact 
on the Company’s business, financial condition and results of operations.

The Company is exposed to political, economic, and other risks that arise from operating a multinational business.

The Company has significant operating activities in numerous countries around the globe that contribute significantly to its revenues 
and earnings. Sales to customers outside the United States constituted approximately 70% of the Company's net sales in fiscal 
2018. Serving a global customer base and remaining competitive in the global marketplace requires the Company to place its 
production in countries outside the U.S., including emerging markets, to capitalize on market opportunities and maintain a cost-
efficient structure. In addition, the Company sources a significant amount of raw materials and other components from third-party 
suppliers in low-cost countries. The Company’s operating activities are subject to a number of risks generally associated with 
multi-national operations, including risks relating to the following:

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•
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general economic conditions;
currency fluctuations and exchange restrictions;
import and export duties and restrictions;
the imposition of tariffs and other import or export barriers;
compliance with regulations governing import and export activities;
current and changing regulatory requirements;
political and economic instability;
potentially adverse income tax consequences;
transportation delays and interruptions;
labor unrest;
natural disasters;
terrorist activities;
public health concerns;
difficulties in staffing and managing multi-national operations; and
limitations on the Company’s ability to enforce legal rights and remedies.

Any of these factors could have a material adverse effect on the Company’s business, financial condition and results of operations.

Disruptions in the Company’s manufacturing, supply or distribution chain could result in an adverse impact on results of 
operations.

The Company sources materials and sell product through various international network channels. A disruption could occur within 
the Company’s manufacturing, distribution or supply chain network. This could include damage or destruction due to various 
causes including natural disasters or political instability which would cause one or more of these network channels to become 
non-operational. This could adversely affect the Company’s ability to manufacture or deliver its products in a timely manner, 
impair its ability to meet customer demand for products and result in lost sales or damage to its reputation. Such a disruption could 
have a material adverse effect on the Company’s business, financial condition and results of operations.

The inability to maintain access to capital markets may adversely affect the Company’s business and financial results.

The Company’s ability to invest in its businesses, make strategic acquisitions, and refinance maturing debt obligations may require 
access to the capital markets and sufficient bank credit lines to support short-term borrowings. If the Company is unable to access 
the capital markets or bank credit facilities, it could experience a material adverse effect on its business, financial condition and 
results of operations.

Fixed costs may reduce operating results if sales fall below expectations.

The Company’s expense levels are based, in part, on its expectations for future sales. Many of the Company’s expenses, particularly 
those relating to capital equipment and manufacturing overhead, are relatively fixed. The Company might be unable to reduce 
spending quickly enough to compensate for reductions in sales. Accordingly, shortfalls in sales could materially and adversely 
affect the Company’s business, financial condition and results of operations.

12

The volatility of the Company’s stock price could affect the value of an investment in the Company’s stock and future 
financial position.

The market price of the Company’s stock can fluctuate widely. Between December 30, 2017 and December 29, 2018, the closing 
sale price of the Company’s common stock ranged between a low of $155.15 and a high of $238.11. The volatility of the stock 
price may be related to any number of factors, such as volatility in the financial markets, general macroeconomic conditions, 
industry conditions, analysts’ expectations concerning the Company’s results of operations, or the volatility of its revenues as 
discussed above under “The Company’s Revenues May Vary Significantly from Period to Period.” The historic market price of 
the Company’s common stock may not be indicative of future market prices. The Company may not be able to sustain or increase 
the value of its common stock. Declines in the market price of the Company’s stock could adversely affect the Company’s ability 
to retain personnel with stock incentives, to acquire businesses or assets in exchange for stock and/or to conduct future financing 
activities with or involving the Company’s common stock.

The Company is exposed to, and may be adversely affected by, potential security breaches or other disruptions to its 
information technology systems and data security.

The Company relies on its information technology systems and networks in connection with many of its business activities. Some 
of these networks and systems are managed directly by the Company, while others are managed by third-party service providers 
and are not under the Company’s direct control. The Company’s operations routinely involve receiving, storing, processing and 
transmitting sensitive information pertaining to its business, customers, dealers, suppliers, employees, and other sensitive matters. 
As with most companies, the Company has experienced cyber-attacks, attempts to breach its systems, and other similar incidents, 
none of which have been material. Any future cyber incidents could, however, materially disrupt operational systems; result in 
loss of trade secrets or other proprietary or competitively sensitive information; compromise personally identifiable information 
regarding employees or customers or other third parties; and jeopardize the security of the Company’s facilities. A cyber incident 
could be caused by malicious outsiders using sophisticated methods to circumvent firewalls, encryption, and other security defenses. 
Because techniques used to obtain unauthorized access or to sabotage systems change frequently and generally are not recognized 
until they are launched against a target, the Company may be unable to anticipate these techniques or to implement adequate 
preventative measures. Information technology security threats, including security breaches, computer malware, and other cyber-
attacks are increasing in both frequency and sophistication and could create financial liability, subject the Company to legal or 
regulatory sanctions or damage the Company’s reputation with customers, dealers, suppliers, and other stakeholders. The Company 
continuously seeks to maintain a robust program of information security and controls, but the impact of a material information 
technology event could have a material adverse effect on the Company’s competitive position, reputation, results of operations, 
financial condition and cash flows.

The Company’s business may be interrupted by labor disputes or other interruptions of supplies.

A work stoppage could occur at certain Company facilities, most likely as a result of disputes under collective bargaining agreements 
or in connection with negotiations of new collective bargaining agreements. In addition, the Company may experience a shortage 
of supplies for various reasons, such as financial distress, work stoppages, natural disasters or production difficulties that may 
affect one of its suppliers. A significant work stoppage, or an interruption or shortage of supplies for any reason, if protracted, 
could substantially adversely affect the Company’s business, financial condition and results of operations. The transfer of the 
Company’s manufacturing operations and changes in its distribution model could disrupt operations for a limited time.

Failure to attract and retain qualified personnel could affect the Company’s business results.

The Company’s success, both generally and in connection with mergers and acquisitions, depends on the Company’s ability to 
attract, retain, and motivate a highly-skilled and diverse management team and workforce. Failure to ensure that the Company 
has the depth and breadth of personnel with the necessary skill set and experience could impede its ability to deliver growth 
objectives and execute the Company’s strategy. Competition for qualified employees among companies that rely heavily upon 
engineering and technology is at times intense, and the loss of qualified employees could hinder the Company’s ability to conduct 
research activities successfully and develop marketable products.

Environmental liabilities could adversely impact the Company’s financial position.

Foreign,  federal,  state  and  local  laws  and  regulations  impose  various  restrictions  and  controls  on  the  discharge  of  materials, 
chemicals and gases used in the Company’s manufacturing processes or in its finished goods. These environmental regulations 
have required the Company to expend a portion of its resources and capital on relevant compliance programs. Under these laws 
and regulations, the Company could be held financially responsible for remedial measures if its current or former properties are 
contaminated or if it sends waste to a landfill or recycling facility that becomes contaminated, even if the Company did not cause 
13

the contamination. The Company may be subject to additional common law claims if it releases substances that damage or harm 
third  parties.  In  addition,  future  changes  in  environmental  laws  or  regulations  may  require  additional  investments  in  capital 
equipment or the implementation of additional compliance programs. Any failure to comply with new or existing environmental 
laws or regulations could subject the Company to significant liabilities and could have a material adverse effect on its business, 
financial condition and results of operations.

In the conduct of manufacturing operations, the Company has handled and does handle materials that are considered hazardous, 
toxic or volatile under federal, state, and local laws. The risk of accidental release of such materials cannot be completely eliminated. 
In addition, the Company operates or owns facilities located on or near real property that was formerly owned and operated by 
others. Certain of these properties were used in ways that involved hazardous materials. Contaminants may migrate from, within 
or  through  these  properties.  These  releases  or  migrations  may  give  rise  to  claims.  Where  third  parties  are  responsible  for 
contamination, the third parties may not have funds, or not make funds available when needed, to pay remediation costs imposed 
upon the Company under environmental laws and regulations.

The Company is responsible for the maintenance of discontinued coal mining operations in Germany. The risk of environmental 
remediation exists and the Company is in the process of remediating the mines considered to be the most at risk.

Customer demands and regulations related to conflict-free minerals may force the Company to incur additional expenses.

The Dodd-Frank Wall Street Reform and Consumer Protection Act requires disclosure of use of “conflict” minerals mined from 
the Democratic Republic of Congo and adjoining countries and efforts to prevent the use of such minerals. In the semiconductor 
industry, these minerals are most commonly found in metals. As there may be only a limited number of suppliers offering “conflict 
free” metals, the Company cannot be certain that it will be able to obtain necessary metals in sufficient quantities or at competitive 
prices. Also, the Company may face challenges with its customers and suppliers if it is unable to sufficiently verify that the metals 
used in its products are “conflict free.”

The Company may not be successful protecting its patents and trademarks.

The Company considers its intellectual property, including patents, trade names, and trademarks, to be of significant value to its 
business as a whole. The Company’s products are manufactured, marketed, and sold under a portfolio of patents, trademarks, 
licenses, and other forms of intellectual property, some of which expire or are allowed to lapse at various dates in the future. The 
Company develops and acquires new intellectual property on an ongoing basis and considers all of its intellectual property to be 
valuable. The Company's policy is to file applications and obtain patents for the great majority of its novel and innovative new 
products including product modifications and improvements. Based on the broad scope of its product lines, the Company believes 
that the loss or expiration of any single intellectual property right would not have a material adverse effect upon its business, 
financial condition or results of operations; however, multiple losses or expirations could have a material adverse effect upon the 
Company’s business, financial condition or results of operations.

ITEM 1B. UNRESOLVED STAFF COMMENTS. 
None.

ITEM 2. PROPERTIES. 

The  Company’s  engineering  and  research  and  development,  manufacturing,  sales,  and  distribution  centers  are  located  in 
approximately 65 owned or leased facilities worldwide with primary operations in China, Germany, Italy, Japan, Lithuania, Mexico, 
Netherlands, Philippines,  South Korea, Taiwan, United Kingdom, and the United States totaling approximately 3.2 million square 
feet. The Company’s owned facilities include approximately 2.0 million square feet and the Company’s leased facilities include 
approximately 1.2 million square feet. The Company’s corporate headquarters is located in the U.S. in Chicago, Illinois.

The Company believes its facilities are adequate to meet its requirements for the foreseeable future.

ITEM 3. LEGAL PROCEEDINGS.

The Company is not a party to any material legal proceedings, other than routine litigation incidental to its business.

ITEM 4. MINE SAFETY DISCLOSURES.

Not applicable.

14

PART II 

ITEM  5.  MARKET  FOR  REGISTRANT’S  COMMON  EQUITY,  RELATED  STOCKHOLDER  MATTERS,  AND 
ISSUER PURCHASES OF EQUITY SECURITIES.

 Shares of the Company’s common stock are traded under the symbol “LFUS” on the NASDAQ Global Select MarketSM.

Number of Holders

As of February 18, 2019, there were 75 holders of record of the Company’s common stock.

Dividend Policy

The future dividend policy will be determined by the Board of Directors based upon its evaluation of earnings, cash availability, 
and general business prospects. Currently, there are restrictions on the payment of dividends contained in the Company’s credit 
agreements that relate to the maintenance of certain financial ratios. However, the Company expects to continue paying cash 
dividends on a quarterly basis for the foreseeable future.

Recent Sales of Unregistered Securities

There were no sales of unregistered securities by us or affiliates during the fiscal year ended December 29, 2018.

Purchases of Equity Securities

The Company’s Board of Directors authorized the repurchase of up to 1,000,000 shares of the Company’s common stock under 
a program for the period May 1, 2018 to April 30, 2019. The Company repurchased 391,972 shares of its common stock during 
fiscal 2018 and 608,028 shares may yet be purchased under the program as of December 29, 2018. As of February 18, 2019, the 
Company has repurchased 79,916 shares of its common stock since the fiscal year ended December 29, 2018.

The table below presents shares of the Company’s common stock which were acquired by the Company during fiscal year ended 
December 29, 2018:

Total number
of shares
purchased

200,000
100
191,872
391,972

Average price
paid per share
179.55
175.00
166.64
—

Total number of
shares purchased
as part of publicly
announced plans
or programs

Maximum number
(or approximate
dollar value) of
shares that may yet
be purchased under
the plans or
programs

200,000
100
191,872
—

800,000
799,900
608,028
608,028

Period

October 1 through October 31
November 1 through November 30
December 1 through December 29
Total

Stock Performance Graph

The following stock performance graph and related information shall not be deemed “soliciting material” or “filed” with the 
Securities and Exchange Commission, nor shall such information be incorporated by reference into any future filings under the 
Securities Act of 1933 or Securities Exchange Act of 1934, each as amended, except to the extent that the Company specifically 
incorporates it by reference into such filing.

During June, 2018 Littelfuse common stock was moved from the Russell 2000 Index to Russell 1000 Index. The Company has 
included  the  Russell  1000  Index  and  Russell  2000  Index  for  the  fiscal  year  ended  December  29,  2018. The  following  stock 
performance graph compares the five-year cumulative total return on Littelfuse common stock to the five-year cumulative total 
returns on the Russell 1000 Index and the Dow Jones Electrical Components and Equipment Industry Group Index. The Company 
believes that the Russell 1000 Index and the Dow Jones Electrical Components and Equipment Industry Group Index represent a 

15

broad market index and peer industry group for total return performance comparison. The stock performance shown on the graph 
below represents historical stock performance and is not necessarily indicative of future stock price performance.

Littelfuse, Inc.
Russell 1000
Russell 2000

Dow Jones US Electrical Components & Equipment

12/13

12/14

12/15

12/16

12/17

12/18

$

$

100
100
100

100

$

105
113
105

108

$

118
114
100

102

$

169
128
122

123

$

221
156
139

157

193
148
124

138

The Dow Jones Electrical Components and Equipment Industry Group Index includes the common stock of A. O. Smith Corp.; 
AAON, Inc.; American Superconductor Corp.; AMETEK, Inc.; Amphenol Corp.; Arrow Electronics, Inc.; Avnet, Inc.; AVX Corp.; 
Capstone Turbine Corp.; CTS Corp.; General Cable Corp.; Hubbell Inc. Class B; Jabil Circuit, Inc.; KEMET Corp.; Littelfuse, 
Inc.;  Methode  Electronics,  Inc.;  Plexus  Corp.;  Powerwave  Technologies,  Inc.;  Regal-Beloit  Corp.;  Vicor  Corp.;  and  Vishay 
Intertechnology, Inc. 

For Littelfuse, Inc. and all indexes noted above, a $100 investment made on December 28, 2013 and reinvestment of all dividends 
is assumed. Returns for the Company’s fiscal years presented above are as of the last day of the respective fiscal year which was 
December 27, 2014, January 2, 2016, December 31, 2016, December 30, 2017, and December 29, 2018 for the fiscal years 2014, 
2015, 2016, 2017, and 2018, respectively.

16

ITEM 6. SELECTED FINANCIAL DATA.

The information presented below provides selected financial data of the Company during the past five fiscal years and should be 
read in conjunction with Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, and 
Item 8, Financial Statements and Supplementary Data, for the respective years presented:

(in thousands, except per share data)
Net sales
Gross profit
Operating income
Net income
Per share of common stock:
Income from continuing operations

- Basic
- Diluted
Cash dividends paid
Cash and cash equivalents
Total assets
Short-term debt
Long-term debt, less current portion

2018
$ 1,718,468
652,541
225,049
164,565

2017
$ 1,221,534
506,533
218,511
119,519

2016
$ 1,056,159
413,117
130,644
104,488

$

2015
867,864
330,499
104,157
80,866

$

2014
851,995
324,428
133,830
98,100

6.62
6.52
1.60
489,733
2,614,306
10,000
684,730

5.27
5.21
1.40
429,676
1,740,102
6,250
489,361

4.63
4.60
1.24
275,124
1,491,194
6,250
447,892

3.58
3.56
1.08
328,786
1,065,475
87,000
83,753

4.35
4.32
0.94
297,571
1,069,859
88,500
105,691

ITEM  7.  MANAGEMENT’S  DISCUSSION  AND  ANALYSIS  OF  FINANCIAL  CONDITION  AND  RESULTS  OF 
OPERATIONS.

The following discussion of Littelfuse’s financial condition and results of operations should be read together with the Consolidated 
Financial Statements and notes to those statements included in Item 8 of Part II of this Annual Report on Form 10-K.

BUSINESS

For a description of the Company’s business, segments and product offerings, see Item 1, Business.

2018 EXECUTIVE OVERVIEW

Net sales increased by $496.9 million, or 40.7%, in 2018 compared to 2017. The increase was primarily driven by the acquisition 
of IXYS, which added $378.2 million in net sales and higher volume in Electronics segment due to strong demand across various 
end markets and geographies within the segment. Additionally, net sales increased by $16.7 million due to favorable changes in 
foreign exchange rates. The Company recognized net income of $164.6 million, or $6.52 per diluted share for the year ended 
December 29, 2018 compared to net income of $119.5 million, or $5.21 per diluted share, for the year ended December 30, 2017. 
The increase in net income reflects operating income increases in both the Electronics and Automotive segments and lower income 
tax expense driven by a one-time tax charge (the "Toll Charge") of $49.0 million in 2017 due to the enactment of the Tax Cuts 
and Jobs Act, partially offset by $36.9 million of purchase accounting inventory step-up charges, higher amortization expense and 
acquisition-related and integration charges related to the IXYS acquisition. Additionally, the per share results reflect an increase 
of 2.1 million shares in the weighted average diluted shares outstanding resulting from the shares issued in conjunction with the 
acquisition of IXYS.

Net cash provided by operating activities was $331.8 million for the year ended December 29, 2018 as compared to $269.2 million 
for the year ended December 30, 2017. The increase in net cash provided by operating activities reflected higher earnings and 
favorable working capital management, which more than offset higher payments related to cash taxes and acquisition and integration 
costs.

On January 17, 2018, the Company acquired IXYS, a global pioneer in the power semiconductor and integrated circuit markets 
with a focus on medium to high voltage power semiconductors across the industrial, communications, consumer and medical 
markets. IXYS has a broad customer base, serving more than 3,500 customers through its direct sales force and global distribution 
partners. The purchase price for IXYS was $856.5 million, which included consideration of cash, Littelfuse common stock, and 
the value of converted or cash settled IXYS equity awards. IXYS’ operations are included in the Electronics segment.

17

On July 6, 2018, the Trump administration imposed Section 301 tariffs on certain products (known as List 1) that are imported 
into the United States where the country of origin is China. Additionally, on August 23, 2018, List 2 was put into effect which 
imposed an additional 25% tariff to products on the list items. These tariffs primarily impact the Electronics segment and, to a 
lesser extent, our Automotive segment. The Company continues to evaluate the impact on our future results of operations.

OUTLOOK

Vision and Strategy

The Company works with its customers to design and develop technologies that help them build safer, more reliable and more 
efficient  products  for  a  safer,  greener  and  increasingly  connected  world  in  virtually  every  market  that  uses  electrical  energy, 
including automotive and commercial vehicles, industrial applications, data and telecommunications, medical devices, consumer 
electronics and appliances. Built upon that framework, the Company’s strategy is centered on growing its core circuit protection 
business, accelerating its growth in power control, and doubling its sensor platform.

The Company’s strategic plan is focused on maximizing shareholder value by driving profitable sales growth, earnings per share 
growth, strong cash flow generation, and maintaining a balanced approach to capital allocation. The Company pursues the following 
major strategic initiatives, which are summarized below, along with more specific areas of focus.

Strategic Objective

2019 and Future Priorities

Double digit sales growth

EPS growth

Cash flow and liquidity

Grow through increased product content with existing customers and
increased market share
Expand portfolio into new and underpenetrated geographies and end markets
Increase innovation capabilities and investments
Expand presence in products and applications that are converging across
business segments
Targeted mergers and acquisitions

Focus on higher profitability growth opportunities
Grow operating margins through operational excellence
Disciplined approach to managing costs

Disciplined management of working capital
Prudent deployment of capital
Disciplined approach to mergers and acquisitions
Grow dividend in line with earnings
Periodic share repurchases

The Company’s strategy is to generate profitable sales growth. In order to accomplish this, the Company is focusing on accelerating 
organic growth by increasing its content and share gains, enhancing technology efforts to drive innovation, capitalizing on cross 
segment opportunities, and gaining traction in underpenetrated geographies and markets. The Company will continue to make 
targeted  strategic  acquisitions  that  align  to  its  strategy  and  financial  targets  to  support  new  business,  products,  markets,  and 
technologies while leveraging existing customers.

Management believes that sustaining profitability through a combination of profitable organic growth and acquisitions is critical 
to  the  Company’s  competitiveness,  while  enhancing  value  the  Company  delivers  to  its  customers.  In  addition,  the  Company 
continues  to  implement  initiatives  across  all  platforms  to  enhance  productivity  while  managing  its  cost  structure,  including 
integration of operations and streamlining administrative and support activities to drive operating margins.

The Company seeks to deploy its capital using a balanced approach. Priorities for capital deployment, over time, include investments 
to drive increased organic growth, targeted acquisitions that align to the Company’s strategic and financial metrics and returning 
capital to shareholders through dividends and periodic share repurchases.

The Company uses several key indicators to gauge progress toward achieving these objectives. These indicators include organic 
sales growth, operating margins, cash flow from operations and capital expenditures. Through cycles, the Company targets double-

18

digit long-term (2017-2021) sales growth, split between 5-7% accelerated organic sales growth and 5-7% growth from strategic 
acquisitions, while targeting operating margins between 17% and 19% and double-digit earnings per share growth. Cash flow 
from operations less capital expenditures is targeted to approximate or exceed net income but in any given year can be significantly 
impacted by the timing of non-recurring or infrequent expenditures.

Significant Accounting Policies and Critical Estimates

Critical Accounting Policies and Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that 
affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial 
statements and the reported amounts of revenues and expenses during the reporting period. The Company’s most critical accounting 
policies are those that are most important to the portrayal of its financial condition and results of operations, and which require 
the Company to make its most difficult and subjective judgments, often as a result of the need to make estimates of matters that 
are inherently uncertain. The Company has identified the following as its most critical accounting policies and judgments. Although 
management believes that its estimates and assumptions are reasonable, they are based upon information available when they are 
made, and therefore, actual results may differ from these estimates under different assumptions or conditions. The Company has 
reviewed these critical accounting policies and related disclosures with the Audit Committee of its Board of Directors. Significant 
accounting policies are more fully described in the Notes to Consolidated Financial Statements included elsewhere in this Annual 
Report.

Revenue Recognition

 On  December  31,  2017,  the  Company  adopted  new  guidance  on  revenue  from  contracts  with  customers  using  the  modified 
retrospective method. The adoption did not have a significant impact on the Company’s consolidated financial statements.

Revenue Disaggregation

The following table disaggregates the Company’s revenue by primary business units for the fiscal year ended December 29, 2018:

(in thousands)

Electronics – Semiconductor

Electronics – Passive Products and Sensors

Passenger Car Products

Commercial Vehicle Products

Automotive Sensors

Industrial Products

Total

Fiscal Year Ended December 29, 2018

Electronics
Segment

Automotive
Segment

Industrial
Segment

Total

$

648,967

$

475,329

— $

—

—

—

—

—
$ 1,124,296

$

240,501

121,562

117,728

—
479,791

— $

648,967

—

—

—

—

475,329

240,501

121,562

117,728

114,381
114,381

114,381
$ 1,718,468

$

See Note 16, 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.

19

The Company has 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 has 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. This is 
similar to the Company’s prior practice and therefore the effect of the new guidance is immaterial.

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 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.

Allowance for Doubtful Accounts: 

The Company evaluates the collectability of its trade receivables based on a combination of factors. The Company regularly 
analyzes its significant customer accounts and, when the Company becomes aware of a specific customer’s inability to meet its 
financial obligations, the Company records a specific reserve for bad debt to reduce the related receivable to the amount the 
Company reasonably believes is collectible. The Company also records allowances for all other customers based on a variety of 
factors including the length of time the receivables are past due, the financial health of the customer, macroeconomic considerations 
and past experience. Historically, the allowance for doubtful accounts has been adequate to cover bad debts. If circumstances 
related to specific customers change, the estimates of the recoverability of receivables could be further adjusted.

Inventory

The  Company  performs  regular  detailed  assessments  of  inventory,  which  include  a  review  of,  among  other  factors,  demand 
requirements, product life cycle and development plans, component cost trends, product pricing, shelf life, and quality issues. 
Based on the analysis, the Company records adjustments to inventory for excess quantities, obsolescence or impairment when 
appropriate to reflect inventory at net realizable value. Historically, inventory reserves have been adequate to reflect inventory at 
net realizable values.

20

Goodwill

The Company’s methodology for allocating the purchase price of acquisitions is based on established valuation techniques that 
reflect  the  consideration  of  a  number  of  factors,  including  valuations  performed  by  third-party  appraisers  when  appropriate. 
Goodwill is measured as the excess of the cost of an acquired entity over the fair value assigned to identifiable assets acquired 
and liabilities assumed. Based on its current organization structure, the Company has seven reporting units for which cash flows 
are determinable and to which goodwill has been allocated. Goodwill is either assigned to a specific reporting unit or allocated 
between reporting units based on the relative excess fair value of each reporting unit.

The Company annually tests goodwill for impairment on the first day of its fiscal fourth quarter, or more frequently if an event 
occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. 
The Company also performs an interim review for indicators of impairment each quarter to assess whether an interim impairment 
review is required for any reporting unit. As part of its interim reviews, management analyzes potential changes in the value of 
individual reporting units based on each reporting unit’s operating results for the period compared to expected results as of the 
prior year’s annual impairment test. In addition, management considers how other key assumptions, including discount rates and 
expected long-term growth rates, used in the last annual impairment test, could be impacted by changes in market conditions and 
economic events. Based on the interim assessments, management concluded that no events or changes in circumstances indicated 
that it was more likely than not that the fair value for any reporting unit had declined below its carrying value.

Quantitative Assessment for Impairment

For the seven reporting units with goodwill, the Company compared the estimated fair value of each reporting unit to its carrying 
value. If the carrying value of a reporting unit exceeded the estimated fair value, the difference between the estimated fair value 
and carrying value is recorded as the amount of the goodwill impairment charge. The results of the goodwill impairment test as 
of October 1, 2018 indicated that the estimated fair values for each of the seven reporting units exceeded their respective carrying 
values. Accordingly,  there  were  no  goodwill  impairment  charges  recorded  as  part  of  the  Company’s  2018  annual  goodwill 
impairment test.

As part of its impairment test for these reporting units, the Company engaged a third-party appraisal firm to assist in the Company’s 
determination of the estimated fair values. This determination included estimating the fair value of each reporting unit using both 
the income and market approaches. The income approach requires management to estimate a number of factors for each reporting 
unit, including projected operating results, economic projections, anticipated future cash flows, discount rates and the allocation 
of shared or corporate items. The market approach estimates fair values using comparable marketplace fair value data from within 
a comparable industry grouping. The Company weighted both the income and market approach equally to estimate the concluded 
fair  value  of  each  reporting  unit.  The  determination  of  fair  value  requires  the  Company  to  make  significant  estimates  and 
assumptions, which primarily include, but are not limited to: the selection of appropriate peer group companies; control premiums 
appropriate for acquisitions in which the Company competes; the discount rate; terminal growth rates; and forecasts of revenue, 
operating income, depreciation and amortization and capital expenditures.

Goodwill Impairment Assumptions

Although the Company believes its estimates of fair value are reasonable, actual financial results could differ from those estimates 
due to the inherent uncertainty involved in making such estimates. Changes in assumptions concerning future financial results or 
other underlying assumptions could have a significant impact on the fair value of the reporting units. Future declines in the overall 
market value of the Company’s equity may also result in a conclusion that the fair value of one or more reporting units has declined 
below its carrying value.

One measure of the sensitivity of the amount of goodwill impairment charges to key assumptions is the amount by which each 
reporting unit “passed” (fair value exceeds the carrying value) the goodwill impairment test. All seven of the reporting units passed 
the goodwill impairment test, with fair values that exceeded the carrying values by between 63% and 370% of their respective 
estimated fair values. As of the most recent annual test conducted on October 1, 2018, the Company noted that the excess of fair 
value over the carrying value, was 176%, 80%, 233%, 202%, 63%, 114%, and 370% for its reporting units: Electronics-Passive 
Products and Sensors, Electronics-Semiconductor, Passenger Car Products, Commercial Vehicle Products, Automotive Sensors, 
Relays, and Power Fuse, respectively. Relatively small changes in the Company’s key assumptions would not have resulted in 
any reporting units failing the goodwill impairment test.

Generally, changes in estimates of expected future cash flows would have a similar effect on the estimated fair value of the reporting 
unit. That is, a 1.0% decrease in estimated annual future cash flows would decrease the estimated fair value of the reporting unit 
by approximately 1.0%. The estimated long-term net sales growth rate can have a significant impact on the estimated future cash 
21

flows, and therefore, the fair value of each reporting unit. A 1.0% decrease in the long-term net sales growth rate would have 
resulted in no reporting units failing the goodwill impairment test. Of the other key assumptions that impact the estimated fair 
values, most reporting units have the greatest sensitivity to changes in the estimated discount rate. The estimated discount rate 
was 11.7% for the Electronics-Passive Products and Sensors, Commercial Vehicle Products, Automotive Sensors and Power Fuse 
reporting units, 9.7% for the Electronics-Semiconductor and Passenger Car Products reporting units, and 12.7% for Relays. A 
1.0% increase in the estimated discount rates would have resulted in no reporting units failing the annual goodwill impairment 
test. The Company believes that its estimates of future cash flows and discount rates are reasonable, but future changes in the 
underlying assumptions could differ due to the inherent uncertainty in making such estimates. Additionally, price deterioration or 
lower volume could have a significant impact on the fair values of the reporting units.

Long-Lived Assets

The  Company  evaluates  the  recoverability  of  other  long-lived  assets,  including  property,  plant  and  equipment  and  certain 
identifiable intangible assets, whenever events or changes in circumstances indicate that the carrying value of an asset or asset 
group may not be recoverable. Factors which could trigger an impairment review include significant underperformance relative 
to historical or projected operating results, significant changes in the manner of use of the assets or the strategy for the overall 
business, a significant decrease in the market value of the assets or significant negative industry or economic trends. When the 
Company determines that the carrying value of long-lived assets may not be recoverable based upon the existence of one or more 
of the indicators, the assets are assessed for impairment based on the estimated future undiscounted cash flows expected to result 
from the use of the asset and its eventual disposition. If the carrying value of an asset exceeds its estimated future undiscounted 
cash flows, an impairment loss is recorded for the excess of the asset’s carrying value over its fair value. During the year ended 
December 29, 2018, the Company recognized non-cash impairment charges of $1.6 million and $0.5 million related to a building 
for sale and the Custom Products reporting unit trade name, respectively, associated with the exit of the Custom business within 
the Industrial Segment. During the year ended December 30, 2017, the Company recognized a loss of $2.9 million related to 
certain machinery and equipment in the Electronics and Automotive segments due to changes in the expected use of these certain 
assets.

Environmental Liabilities

Environmental liabilities are accrued based on estimates of the probability of potential future environmental exposure. Costs 
related to on-going maintenance of environmental sites are expensed as incurred. If actual or estimated probable future losses 
exceed the Company’s recorded liability for such claims, it would record additional charges as other expense during the period in 
which the actual loss or change in estimate occurred. The Company evaluates its reserve for coal mine remediation annually 
utilizing a third-party expert.

Pension and Supplemental Executive Retirement Plan

The Company records annual income and expense amounts relating to its pension and postretirement benefits plans based on 
calculations  which  include  various  actuarial  assumptions  including  discount  rates,  expected  long-term  rates  of  return  and 
compensation increases. The Company reviews its actuarial assumptions on an annual basis as of the fiscal year-end balance sheet 
date (or more frequently if a significant event requiring remeasurement occurs) and modifies the assumption based on current 
rates and trends when it is appropriate to do so. The effects of modifications are recognized immediately on the Consolidated 
Balance Sheets but are generally amortized into operating earnings over future periods, with the deferred amount recorded in 
accumulated other comprehensive income (loss). The Company believes that the assumptions utilized in recording its obligations 
under its plans are reasonable based on its experience, market conditions and input from its actuaries and investment advisors. 
The Company maintains several pension plans in international locations. The expected returns on plan assets and discount rates 
are determined based on each plan’s investment approach, local interest rates and plan participant profiles. The discount rates for 
the Company’s defined benefit plans primarily in Europe and the Asia-Pacific regions at December 29, 2018 and December 30, 
2017 were 3.1% and 3.1%, respectively.

A 50 basis point change in the discount rates at December 29, 2018 would have the following effect on the projected benefit 
obligation:

(in millions)
Projected benefit obligation

0.5%
Increase

0.5%
Decrease

$

(7.4) $

8.1

22

Equity-based Compensation

Equity-based compensation expense is recorded for stock-option awards and restricted share units based upon the fair values of 
the awards. The fair value of stock-option awards is estimated at the grant date using the Black-Scholes option pricing model, 
which includes assumptions for volatility, expected term, risk-free interest rate and dividend yield. Expected volatility is based 
on implied volatilities from traded options on Littelfuse stock, historical volatility of Littelfuse stock and other factors. Historical 
data is used to estimate employee termination experience and the expected term of the options. The risk-free interest rate is based 
on the U.S. Treasury yield curve in effect at the time of grant. The Company initiated a quarterly cash dividend in 2010 and expects 
to continue making cash dividend payments in the foreseeable future.

Total equity-based compensation expense for all equity compensation plans was $28.2 million, $17.3 million, and $12.8 million 
in  2018,  2017,  and  2016,  respectively.  Further  information  regarding  this  expense  is  provided  in  Note  12,  Stock-Based 
Compensation, of the Notes to Consolidated Financial Statements included in this Annual Report.

Income Taxes

The Company accounts for income taxes using the liability method. Deferred taxes are recognized for the future effects of temporary 
differences between financial and income tax reporting using tax rates in effect for the years in which the differences are expected 
to reverse. The Company recognizes deferred taxes for temporary differences, operating loss carryforwards and tax credit and 
other tax attribute carryforwards (excluding carryforwards where usage has been determined to be remote). Deferred tax assets 
are reduced by a valuation allowance if it is more likely than not that some portion, or all, of the deferred tax assets will not be 
realized. U.S. state and non-U.S. income taxes are provided on the portion of non-U.S. income that is expected to be remitted to 
the U.S. and be taxable (and non-U.S. income taxes are provided on the portion of non-U.S. income that is expected to be remitted 
to an upper-tier non-U.S. entity). Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on 
the date of enactment.

Deferred income taxes are not provided on the excess of the investment value for financial reporting over the tax basis of investments 
in those non-U.S. subsidiaries for which such excess is considered to be permanently reinvested in those operations. Management 
regularly evaluates whether non-U.S. earnings are expected to be permanently reinvested. This evaluation requires judgment about 
the future operating and liquidity needs of the Company and its non-U.S. subsidiaries. Changes in economic and business conditions, 
non-U.S. or U.S. tax laws (such as the Tax Act), or the Company’s financial situation could result in changes to these judgments 
and the need to record additional tax liabilities.

The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will 
be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized 
in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood 
of being realized upon ultimate settlement.

On December 22, 2017, the U.S. enacted legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). Among 
other things, the Tax Act reduces the U.S. corporate federal income tax rate from 35% to 21%, adds base broadening provisions 
which limit deductions and address excessive international tax planning, imposes a one-time tax (the “Toll Charge”) on accumulated 
earnings of certain non-U.S. subsidiaries and enables repatriation of earnings of non-U.S. subsidiaries free of U.S. federal income 
tax. Other than the Toll Charge (which, except for the IXYS impact, was applicable to the Company for 2017), the provisions are 
generally applicable to the Company in 2018 and beyond.

In accordance with the guidance provided in SEC Staff Accounting Bulletin (“SAB”) No. 118, in the fourth quarter of 2017 the 
Company recorded a charge of $47.0 million as a provisional reasonable estimate of the impact of the Tax Act, including $49.0 
million for the Toll Charge net of $2.0 million for other net tax benefits. In the fourth quarter of 2018, within the measurement 
period outlined in SAB No. 118, the Company finalized its estimates of the impact of the Tax Act as of December 30, 2017 and 
recorded a charge of $3.2 million, including $2.3 million for the Toll Charge and $0.9 million for the net impact of other items. 
In addition, the Company recorded $7.0 million for the Toll Charge associated with IXYS as part of the IXYS acquisition purchase 
price allocation. This was reflected in the opening balance sheet as an increase to goodwill and other long-term liabilities.

One of the base broadening provisions of the Tax Act is commonly referred to as the tax on global intangible low-taxed income 
provisions (the "GILTI"). In accordance with guidance issued by the FASB staff, the Company has adopted an accounting policy 
to treat any GILTI inclusions as a period cost if and when incurred. Thus, for the year ended December 29, 2018, deferred taxes 
were computed without consideration of the possible future impact of the GILTI provisions, and any current year impact was 
recorded as a part of the current portion of income tax expense.

23

Further information regarding income taxes, including a detailed reconciliation of current year activity, is provided in Note 14, 
Income Taxes, of the Notes to Consolidated Financial Statements included in this Annual Report.

Off-Balance Sheet Arrangements

Other than non-cancellable operating lease commitments, the Company does not have off-balance sheet arrangements, financings 
or special purpose entities.

In the financial review that follows, the Company discusses its consolidated results of operations, financial position, cash flows 
and certain other information. This discussion should be read in conjunction with the Company’s Consolidated Financial Statements 
and related notes.

RESULTS OF OPERATIONS FOR THE YEAR ENDED DECEMBER 29, 2018 AS COMPARED TO THE YEAR 
ENDED DECEMBER 30, 2017

The following table summarizes the Company’s consolidated results of operations for periods presented. The fiscal year 2018 
includes approximately $88.7 million of non-segment charges, of which $82.9 million of charges are primarily related to the IXYS 
acquisition as described in Note 2, Acquisitions and Dispositions, of the Notes to Consolidated Financial Statements included in 
this Annual  Report. These  charges  include  $36.9  million  of  purchase  accounting  inventory  step-up  charges,  $18.7  million  in 
acquisition-related  and  integration  costs  primarily  related  to  legal,  accounting  and  other  expenses,  $12.4  million  in  backlog 
amortization costs, $8.3 million of employee termination costs and other restructuring charges, $4.5 million of stock compensation 
expense recognized immediately upon close for converted IXYS options related to prior service periods, and $2.1 million change 
in control expense related to IXYS. In addition, there were $5.8 million of employee termination costs, impairment and other 
restructuring charges and acquisition-related expenses for other contemplated acquisitions and included charges associated with 
the exit of the Custom business in the second quarter within the Industrial segment.

The  fiscal  year  2017  includes  approximately  $10.3  million  of  non-segment  charges.  These  included  acquisition-related  and 
integration costs related to legal, accounting and other expenses associated with completed or pending acquisitions of approximately 
$8.0 million, including $1.6 million of purchase accounting inventory charges related to the Company’s 2017 acquisition of U.S. 
Sensor as described in Note 2, Acquisitions and Dispositions, of the Notes to Consolidated Financial Statements included in this 
Annual Report, and $2.2 million of charges related to restructuring and production transfers in the Company’s Asia operations.

Fiscal year 2018 also included approximately $0.9 million in foreign currency exchange gains primarily attributable to changes 
in the value of the euro, Mexico peso, Philippine peso and Chinese renminbi against the U.S. dollar, while fiscal year 2017 also 
included approximately $2.4 million in foreign currency exchange losses primarily attributable to changes in the value of the euro, 
Philippine peso and Chinese renminbi against the U.S. dollar.

(in thousands, except % change)
Net sales
Gross profit
Operating expenses
Operating income
Other income, net
Income before income taxes
Income taxes
Net income

Net Sales

Fiscal Year

$

$

2018
1,718,468
652,541
427,492
225,049
(1,599)
204,942
40,377
164,565

$

2017
1,221,534
506,533
288,022
218,511
(1,282)
204,037
84,518
119,519

Change

% Change

496,934
146,008
139,470
6,538
(317)
905
(44,141)
45,046

40.7 %
28.8 %
48.4 %
3.0 %
24.7 %
0.4 %
(52.2)%
37.7 %

Net sales for 2018 of $1,718.5 million increased $496.9 million, or 40.7%, compared to the prior year with increases of $378.2 
million and $6.5 million resulting from incremental net sales related to the IXYS and U.S. Sensor acquisitions, respectively, $16.7 
million of favorable changes in foreign exchange rates, and volume growth across all three segments.

24

Gross Profit

Gross profit was $652.5 million, or 38.0% of net sales, in 2018, compared to $506.5 million, or 41.5% of net sales, in 2017. The 
increase in gross profit reflects the IXYS acquisition and volume growth and expense leverage across all segments. The decrease 
in gross margin is primarily due to the purchase accounting inventory charges of $36.9 million, which negatively impacted gross 
margin by 2.1 percentage points, and an unfavorable mix of products from the IXYS acquisition, which historically had lower 
gross margins.

Operating Expenses

Total operating expenses were $427.5 million, or 24.9% of net sales, for 2018 compared to $288.0 million, or 23.6% of net sales, 
for 2017. The increase in operating expenses of $139.5 million was primarily due to the incremental operating expenses related 
to the IXYS and U.S. Sensor acquisitions, an increase in amortization expense of $27.5 million resulting from the acquisition of 
IXYS as well as higher acquisition-related and integration costs of $12.1 million. Total operating expenses as a percent of net 
sales increased from 23.6% in 2017 to 24.9% in 2018 primarily due to the higher amortization expense and acquisition-related 
and integration charges noted above.

Operating Income

Operating income for 2018 was $225.0 million, an increase of $6.5 million or 3.0% compared to $218.5 million for 2017. The 
increase in operating income is primarily due to the acquisition of IXYS and volume growth in the Electronics and Industrial 
segments, partially offset by $36.9 million of purchase accounting inventory charges, higher acquisition-related and integration 
charges and amortization expense. Operating margins decreased from 17.9% in 2017 to 13.1% in 2018 driven by the purchase 
accounting inventory charges, higher amortization expense and acquisition-related and integration charges that negatively impacted 
margins by 2.1%, 1.6% and 0.7%, respectively.

Income Before Income Taxes

Income before income taxes for 2018 was $204.9 million, or 11.9% of net sales compared to $204.0 million, or 16.7% of net 
sales, for 2017. In addition to the factors impacting comparative results for operating income discussed above, income before 
income taxes was unfavorably impacted by higher interest expense of $9.2 million mainly resulting from increased borrowings, 
partially offset by  increases in foreign exchange gains of $3.2 million.

Income Taxes

Income tax expense for 2018 was $40.4 million, or an effective tax rate of 19.7% compared to income tax expense of $84.5 million, 
or an effective tax rate of 41.4%, for 2017. The 2018 income tax expense includes a charge of $3.2 million associated with finalizing 
the 2017 provisional reasonable estimate, including $2.3 million for the Toll Charge and $0.9 million for the net impact of other 
items. The 2017 income tax expense includes a charge of $47 million as a provisional reasonable estimate of the impact of the 
Tax Act, including $49 million for the Toll Charge net of $2 million for other net tax benefits. Additionally, our tax rates are lower 
than the applicable U.S. statutory tax rate primarily due to income earned in lower tax jurisdictions, partially offset by the impact 
of taxes on unremitted earnings, and, with respect to 2018, the impact of the GILTI provisions of the Tax Act and non-U.S. losses 
and expenses with no tax benefit.

Segment Information

The Company reports its operations by the following segments: Electronics, Automotive and Industrial. Segment information is 
described more fully in Note 16, Segment Information, of the Notes to Consolidated Financial Statements included in this Annual 
Report.

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

25

(in millions)
Electronics
Automotive
Industrial
Total

Electronics Segment

Fiscal Year

2018

2017

Change

% Change

$

$

1,124.3
479.8
114.4
1,718.5

$

$

661.9
453.2
106.4
1,221.5

$

$

462.4
26.6
8.0
497.0

69.9%
5.9%
7.5%
40.7%

The Electronics segment net sales increased $462.4 million, or 69.9%, in 2018 compared to 2017 due to incremental net sales 
related to the IXYS and U.S. Sensor acquisitions of $378.2 million and $6.5 million, respectively, volume growth driven by the 
continued strong demand across various end markets and geographies, and favorable foreign exchange impacts of $6.5 million.

Automotive Segment

Net sales in the Automotive segment increased $26.6 million, or 5.9%, in 2018 compared to 2017 due to volume growth across 
all businesses primarily led by the commercial vehicle and sensor businesses, and favorable foreign exchange impacts of $9.8 
million.

Industrial Segment

The Industrial segment net sales increased $8.0 million, or 7.5%, in 2018 compared to 2017 primarily due to volume growth in 
the power fuse and relay businesses and favorable foreign exchange impacts of $0.4 million, partially offset by a decline in sales 
from the exit of the Custom business during 2018.

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:

(in millions)
Asia-Pacific
Americas
Europe

Total

Asia-Pacific

Fiscal Year

2018

2017

Change

% Change

$

$

753.3
578.6
386.6
1,718.5

$

$

541.1
436.5
243.9
1,221.5

$

$

212.2
142.1
142.7
497.0

39.2%
32.6%
58.5%
40.7%

Asia-Pacific net sales increased $212.2 million, or 39.2%, in 2018 compared to 2017. The increase in net sales was primarily due 
to incremental net sales related to the IXYS acquisition of $173.9 million and volume growth across all segments as well as 
favorable foreign exchange impacts of $3.7 million.

Americas

Net sales in the Americas increased $142.1 million, or 32.6%, in 2018 compared to 2017 driven by incremental net sales related 
to the IXYS and U.S. Sensor acquisitions of $90.7 million and $5.5 million, respectively, volume growth across all segments and 
favorable foreign exchange impacts of $0.4 million.

Europe

European net sales increased $142.7 million, or 58.5%, in 2018 compared to 2017. The increase in net sales was primarily due to 
incremental net sales related to the IXYS acquisition of $113.6 million with volume growth across the Electronics and Automotive 
segments as well as favorable foreign exchange impacts of $12.6 million. 

26

RESULTS OF OPERATIONS FOR THE YEAR ENDED DECEMBER 30, 2017 AS COMPARED TO THE YEAR 
ENDED DECEMBER 31, 2016

The following table summarizes the Company’s consolidated results of operations for periods presented. The fiscal year 2017 
includes approximately $10.3 million of non-segment charges. These included acquisition-related and integration costs related to 
legal, accounting and other expenses associated with completed or pending acquisitions of approximately $8.0 million, including 
$1.6 million of purchase accounting inventory charges related to the Company’s 2017 acquisition of U.S. Sensor as described in 
Note 2, Acquisitions and Dispositions, of the Notes to Consolidated Financial Statements included in this Annual Report, and $2.2 
million of charges related to restructuring and production transfers in the Company’s Asia operations.

The fiscal year 2016 includes approximately $50.0 million of non-segment charges. These included $14.8 million of charges 
related to the impairment of the Custom Products reporting unit, $21.4 million of acquisition and integration costs associated with 
the Company’s 2016 acquisitions, primarily PolySwitch, $7.8 million of non-cash fair value step-up inventory charges relating to 
the Company’s 2016 acquisitions, primarily PolySwitch, as described in Note 2, Acquisitions and Dispositions, of the Notes to 
Consolidated Financial Statements included in this Annual Report, $1.9 million in charges related to the closure of the Company’s 
manufacturing facility in Denmark, $1.6 million related to the Company’s transfer of its reed sensor manufacturing operations 
from the U.S. and China to the Philippines, and $2.5 million related to restructuring costs.

Fiscal year 2017 also included approximately $2.4 million in foreign currency exchange losses primarily attributable to changes 
in  the  value  of  the  euro,  Philippine  peso  and  Chinese  renminbi  against  the  U.S.  dollar,  while  fiscal  year  2016  also  included 
approximately $0.5 million in foreign currency exchange losses primarily attributable to changes in the value of the euro, Philippine 
peso and Chinese renminbi against the U.S. dollar.

(in thousands, except % change)
Net sales
Gross profit
Operating expenses
Operating income
Other income, net
Income before income taxes
Income taxes
Net income

Net Sales

Fiscal Year

$

$

2017
1,221,534
506,533
288,022
218,511
(1,282)
204,037
84,518
119,519

$

2016
1,056,159
413,117
282,473
130,644
(1,730)
123,274
18,786
104,488

Change

% Change

165,375
93,416
5,549
87,867
(448)
80,763
65,732
15,031

15.7 %
22.6 %
2.0 %
67.3 %
(25.9)%
65.5 %
349.9 %
14.4 %

Net sales for 2017 of $1,221.5 million increased $165.4 million, or 15.7%, compared to the prior year, resulting from the prior 
year acquisitions of PolySwitch, ON Portfolio, and Menber’s and $5.4 million from the current year U.S. Sensor acquisition. The 
remaining increase in net sales was primarily due to higher volume across all product lines in the Electronics segment and passenger 
car and commercial vehicle businesses within the Automotive segment partially offset by the divestitures of two non-core product 
lines within the Industrial segment in 2016.

Gross Profit

Gross profit was $506.5 million, or 41.5% of net sales, in 2017, compared to $413.1 million, or 39.1% of net sales, in 2016. The 
increase in gross profit and gross margin reflects the incremental net sales and improved leverage in expenses and profits related 
to the prior year acquisitions, primarily in the Electronics segment.

Operating Expenses

Total operating expenses were $288.0 million, or 23.6% of net sales, for 2017 compared to $282.5 million, or 26.7% of net sales, 
for 2016. The increase in operating expenses of $5.5 million was primarily due to acquisitions, higher selling costs, higher research 
and development costs of $8.3 million and an increase of $5.4 million in amortization expense of intangible assets due to the 
acquisitions, partially offset by the $14.8 million of goodwill and other intangible asset impairment charges recognized in 2016 
and  lower  acquisition-related  expenses  and  integration  costs  of  $13.4  million.  Selling,  general,  and  administrative  expenses 

27

increased by $6.7 million to $212.8 million, but decreased from 19.5% to 17.4% as a percentage of net sales for 2017 compared 
to 2016 primarily as a result of lower acquisition-related expenses and integration costs of $13.4 million and cost control initiatives 
partially offset by the acquisitions.

Operating Income

Operating income for 2017 was $218.5 million, an increase of $87.9 million or 67.3% compared to $130.6 million for 2016. The 
increase in operating income was the result of acquisitions and higher volume in the Electronics segment. Operating margins 
increased from 12.4% in 2016 to 17.9% in 2017 due to the acquisitions, improvement in gross margins primarily driven by the 
Electronics segment, lower acquisition and integration related costs, the prior year goodwill and other intangible asset impairment 
charge and operational efficiencies. Also, the prior year goodwill and other intangible asset impairment charge reduced the operating 
margin by 1.4% in 2016.

Income Before Income Taxes

Income before income taxes for 2017 was $204.0 million, or 16.7% of net sales compared to $123.3 million, or 11.7% of net 
sales, for 2016. Income before income taxes was impacted by an increase in operating income described above, partially offset 
by higher interest expense of $4.8 million reflecting increased borrowings and unfavorable changes in foreign exchange rates 
of $1.9 million primarily as a result of fluctuations in the Chinese renminbi and Philippine peso against the U.S. dollar partially 
offset by fluctuations in the Euro against the U.S. dollar.

Income Taxes

Income tax expense for 2017 was $84.5 million, or an effective tax rate of 41.4% compared to income tax expense of $18.8 million, 
or an effective tax rate of 15.2%, for 2016. The increase in 2017 reflects a fourth quarter charge of $47 million as a provisional 
reasonable estimate of the impact of the Tax Act, including $49 million for the Toll Charge net of $2 million for other net tax 
benefits. Additionally, the effective tax rates for 2017 and 2016 are lower than the U.S. statutory tax rate primarily due to income 
earned in lower tax jurisdictions partially offset by the impact of taxes on unremitted earnings, and, with respect to 2016, a one-
time deduction with respect to the stock of one of the Company’s affiliates, partially offset by the impact of the impairment of 
goodwill for which no tax benefit was recorded.

Segment Information

The Company reports its operations by the following segments: Electronics, Automotive and Industrial. Segment information is 
described more fully in Note 16, Segment Information, of the Notes to Consolidated Financial Statements included in this Annual 
Report.

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

(in millions)
Electronics
Automotive
Industrial
Total

Electronics Segment

Fiscal Year

2017

2016

Change

% Change

$

$

661.9
453.2
106.4
1,221.5

$

$

535.2
415.2
105.8
1,056.2

$

$

126.7
38.0
0.6
165.3

23.7%
9.2%
0.6%
15.7%

The Electronics segment net sales increased $126.7 million, or 23.7%, in 2017 compared to 2016 primarily due to the PolySwitch, 
and ON Portfolio acquisitions in 2016, and the U.S Sensor acquisition in 2017 along with higher volume across the passives, 
sensors and semiconductor product lines.

Automotive Segment

Net sales in the Automotive segment increased $38.0 million, or 9.2%, in 2017 compared to 2016 primarily due to the incremental 
net sales associated with the PolySwitch and Menber’s acquisitions in 2016, higher volume in passenger car and commercial 

28

vehicle products and favorable foreign exchange impacts of $1.9 million, partially offset by lower volume in automotive sensor 
products.

Industrial Segment

The Industrial segment net sales increased $0.6 million, or 0.6%, in 2017 compared to 2016 primarily due to higher volume across 
all product lines, partially offset by the divestiture of two non-core product lines, one in the fourth quarter of 2016 and the other 
in the first quarter of 2016.

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:

(in millions)
Americas
Europe
Asia-Pacific
Total

Americas

Fiscal Year

2017

2016

Change

% Change

$

$

436.5
243.9
541.1
1,221.5

$

$

411.1
200.3
444.8
1,056.2

$

$

25.4
43.6
96.3
165.3

6.2%
21.8%
21.7%
15.7%

Net sales in the Americas increased $25.4 million, or 6.2%, in 2017 compared to 2016 resulting from acquisitions and higher 
volume in the passive and semiconductor product lines in the Electronics segment and the passenger car and commercial vehicle 
businesses in the Automotive segment that were partially offset by lower volume in sensor products in the Automotive segment 
and the divestiture of a non-core product line in the Industrial segment.

Europe

European net sales increased $43.6 million, or 21.8%, in 2017 compared to 2016. The increase in net sales was primarily due to 
acquisitions and increased net sales across all product lines in the Electronics segment and the passenger car and commercial 
vehicle products businesses in the Automotive segment.

Asia-Pacific

Asia-Pacific net sales increased $96.3 million, or 21.7%, in 2017 compared to 2016, primarily due to incremental net sales from 
prior year acquisitions and increased volume across all product lines in the Electronics segment.

Liquidity and Capital Resources

Cash and cash equivalents were $489.7 million as of December 29, 2018, an increase of $60.0 million as compared to December 30, 
2017.

As  of  December 29,  2018,  $400  million  of  the  Company's  $489.7  million  cash  and  cash  equivalents  was  held  by  non-U.S. 
subsidiaries. Of the $400 million, at least $200 million can be repatriated with minimal tax consequences, although in certain cases 
a non-U.S. withholding tax would be payable but subsequently refunded. With respect to the remaining $200 million, the Company 
has recognized deferred tax liabilities on approximately $91.0 million as of December 29, 2018 because the amounts are not 
considered  to  be  permanently  reinvested,  and  the  Company  may  access  additional  amounts  through  loans  and  other  means. 
Repatriation of some non-U.S. cash balances is restricted by local laws. Management regularly evaluates whether foreign earnings 
are expected to be permanently reinvested. This evaluation requires judgment about the future operating and liquidity needs of 
the Company and its foreign subsidiaries. Changes in economic and business conditions, non-U.S. or U.S. tax laws could result 
in changes to these judgments and the need to record additional tax liabilities.

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 

29

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.

Revolving Credit Facility/Term Loan

On March 4, 2016, the Company entered into a five-year credit agreement (“Credit Agreement”) with a group of lenders for up 
to $700.0 million. The Credit Agreement consisted of an unsecured revolving credit facility (“Revolving Credit Facility”) of $575.0 
million and an unsecured term loan credit facility (“Term Loan”) of up to $125.0 million. In addition, the Company had the ability, 
from time to time, to increase the size of the Revolving Credit Facility and the Term Loan by up to an additional $150.0 million, 
in  the  aggregate,  in  each  case  in  minimum  increments  of  $25.0  million,  subject  to  certain  conditions  and  the  agreement  of 
participating lenders.

On October 13, 2017, the Company amended the Credit Agreement to increase the Revolving Credit Facility from $575.0 million 
to $700.0 million and increase the Term Loan from $125.0 million to $200.0 million and to extend the expiration date from March 
4, 2021 to October 13, 2022. The Credit Agreement also includes the option for the Company to increase the size of the Revolving 
Credit Facility and the Term Loan by up to an additional $300.0 million, in the aggregate, subject to the satisfaction of certain 
conditions set forth in the Credit Agreement. Term Loans may be made in up to two advances. The first advance of $125.0 million 
occurred on October 13, 2017 and the second advance of $75.0 million occurred on January 16, 2018. For the Term Loan, the 
Company is required to make quarterly principal payments of 1.25% of the original term loan ($2.5 million with the second advance 
on January 16, 2018) through maturity, with the remaining balance due on October 13, 2022. In addition to the quarterly principal 
payments, the Company paid $35.0 million of additional principal on the Term Loan during the fiscal year ended December 29, 
2018.

Outstanding borrowings under the Credit Agreement bear interest, at the Company’s option, at either LIBOR (fixed for interest 
periods of one, two, three or six-month periods) plus 1.00% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.00% to 1.00%, 
based upon the Company’s Consolidated Leverage Ratio, as defined. The Company is also required to pay commitment fees on 
unused portions of the credit agreement ranging from 0.15% to 0.25%, based on the Consolidated Leverage Ratio, as defined in 
the agreement. The credit agreement includes 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 3.59% at December 29, 
2018.

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 August 15, 2018.

The Company was in compliance with its debt covenants as of December 29, 2018 and expects to remain in compliance based on 
management’s estimates of operating and financial results for 2019 and the foreseeable future. As of December 29, 2018, the 

30

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.

Acquisitions

During the year ended December 29, 2018, the Company paid $306.5 million, net of cash acquired, for the acquisition of IXYS. 
Pursuant to the Securities Purchase Agreement, the Company paid $9.0 million for the acquisition of the remaining 38% outstanding 
common stock of Monolith during the year ended December 29, 2018. The Company financed the cash portion of the acquisition 
with a combination of cash on hand and borrowings under the credit facility.

During the year ended December 30, 2017, the Company paid $38.5 million, net of cash acquired, for the acquisitions of U.S 
Sensor and Monolith. The Company financed the cash portion of the acquisition with a combination of cash on hand and borrowings 
under the credit facility.

During the year ended December 31, 2016, the Company paid $471.1 million of total purchase prices, net of cash acquired, for 
the acquisitions of the ON Portfolio, Menber’s and PolySwitch. The Company financed the cash portion of these acquisitions with 
a combination of cash on hand and borrowings under the credit facility.

Cash Flow Overview

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.

The following describes the Company’s cash flows for the twelve months ended December 29, 2018 and December 30, 2017:

(in millions)
Net cash provided by operating activities
Net cash used in investing activities
Net cash provided by (used in) financing activities
Effect of exchange rate changes on cash and cash equivalents

Increase in cash and cash equivalents
Cash and cash equivalents at beginning of year

Cash and cash equivalents at end of year

Cash Flow from Operating Activities

Fiscal Year

2018

2017

$

$

331.8
(382.3)
121.9
(11.4)
60.0
429.7
489.7

$

$

269.2
(96.1)
(24.7)
6.2
154.6
275.1
429.7

Net cash provided by operating activities was $331.8 million for 2018, compared to $269.2 million during 2017. The increase in 
net cash provided by operating activities was primarily driven by higher earnings and  favorable working capital management that 
more than offset higher payments related to cash taxes and acquisition and integration costs.

Cash Flow from Investing Activities

Net cash used in investing activities was $382.3 million for 2018, compared to $96.1 million during 2017. Net cash used for the 
acquisition of IXYS was $306.5 million in 2018 compared to acquisitions of $38.5 million in 2017 related to the acquisition of a 
majority stake in Monolith for $14.2 million and the acquisition of U.S. Sensor for $24.3 million. Capital expenditures were $74.8 
million, representing an increase of $8.8 million compared to 2017. The Company also received proceeds of $9.6 million in 2018 
primarily as a result of the sale of a building.

Cash Flow from Financing Activities

Net cash provided by financing activities was $121.9 million for 2018 compared to net cash used in financing activities of $24.7 
million for 2017. The Company had $310.0 million of proceeds from the credit facility, term loan and senior notes payable partially 
offset by payments of $102.5 million on the credit facility and term loan in 2018 as compared to $149.4 million of proceeds from 
the credit facility, term loan and senior notes payable and $134.7 million of payments on the credit facility and term loan during 
2017. The Company repurchased 391,972 shares of its common stock during fiscal 2018 totaling $63.6 million.

31

The following describes the Company’s cash flows for the twelve months ended December 30, 2017 and December 31, 2016:

(in millions)
Net cash provided by operating activities
Net cash used in investing activities
Net cash (used in) provided by financing activities
Effect of exchange rate changes on cash and cash equivalents

Increase (decrease) in cash and cash equivalents

Cash and cash equivalents at beginning of year

Cash and cash equivalents at end of year

Cash Flow from Operating Activities

Fiscal Year

2017

2016

269.2
(96.1)
(24.7)
6.2
154.6
275.1
429.7

$

$

180.1
(511.2)
284.2
(6.8)
(53.7)
328.8
275.1

$

$

Net cash provided by operating activities was $269.2 million for 2017, compared to $180.1 million during 2016. The increase in 
net cash provided by operating activities was primarily driven by higher earnings, lower cash taxes, reduced acquisition and 
integration payments and the timing of supplier and customer payments.

Cash Flow from Investing Activities

Net cash used in investing activities was $96.1 million for 2017, compared to $511.2 million during 2016. Net cash used for 
acquisitions of $38.5 million in 2017 related to the acquisition of a majority stake in Monolith for $14.2 million and the acquisition 
of U.S. Sensor for $24.3 million. Net cash used for acquisitions of $471.1 million for 2016 primarily related to the acquisitions 
of PolySwitch for $344.5 million, the ON Portfolio for $104.0 million and Menber’s for $19.2 million. Capital expenditures were 
$65.9 million, representing an increase of $19.7 million compared to 2016.

Cash Flow from Financing Activities

Net cash used in financing activities was $24.7 million for 2017 compared to net cash provided by financing activities of $284.2 
million for 2016. The Company had $149.4 million of proceeds from the credit facility, term loan and senior notes payable and 
$134.7 million of payments on the term loan and credit facility in 2017 as compared to $718.4 million of proceeds from the credit 
facility, term loan and senior notes payable and $421.2 million of payments on the term loan and credit facility during 2016.

Dividends

Cash dividends paid totaled $40.0 million, $31.8 million and $27.9 million for 2018, 2017 and 2016, respectively. On January 24, 
2019, the Board of Directors of the Company declared a quarterly cash dividend of $0.43 per share, payable on March 7, 2019 to 
stockholders of record as of February 21, 2019.

Capital Resources

The  Company  expends  capital  to  support  its  operating  and  strategic  plans.  Such  expenditures  include  strategic  acquisitions, 
investments to maintain capital assets, develop new products or improve existing products, and to enhance capacity or productivity. 
Many of the associated projects have long lead-times and require commitments in advance of actual spending.

Share Repurchase Program

The Company’s Board of Directors authorized the repurchase of up to 1,000,000 shares of the Company’s common stock under 
a program for the period May 1, 2018 to April 30, 2019 (“Share Repurchase Program”). During the fiscal year 2018, the 
Company repurchased 391,972 shares of its common stock. The Company did not repurchase any shares of its common stock 
during fiscal 2017.

As of February 18, 2019, the Company has repurchased 79,916 shares of its common stock since the fiscal year ended December 
29, 2018.

32

Contractual Obligations and Commitments

The following table summarizes outstanding contractual obligations and commitments as of December 29, 2018:

(in thousands)
Long-term debt(a)
Interest payments(b)
Operating lease payments(c)
Income Tax Obligation(d)
Purchase obligations(e)

Total

Total

Less than
1 Year

1 to 3
 Years

3 to 5
 Years

$

$

699,366
135,902
32,607
32,364
30,886
931,125

$

$

10,000
19,124
9,133
3,571
27,814
69,642

$

$

20,000
37,156
13,164
5,738
711
76,769

$

$

286,036
29,440
7,536
8,045
700
331,757

$

$

Greater
than
 5 Years

383,330
50,182
2,774
15,010
1,661
452,957

(a) Excludes offsetting issuance costs of $4.6 million. Euro denominated debt amounts are converted based on the Euro to
U.S. Dollar spot rate at year end. For more information see Note 9, Debt, of the Notes to Consolidated Financial Statements.

(b) Amounts represent estimated contractual interest payments on outstanding debt. Rates in effect as of December 29, 2018
are used for variable rate debt. For more information see Note 9, Debt, of the Notes to Consolidated Financial Statements.

(c) For more information see Note 7, Lease Commitments, of the Notes to Consolidated Financial Statements.

(d) The Income Tax Obligation represents the remaining amounts payable in regard to the 2017 Littelfuse Toll Charge and
the 2018 IXYS Toll Charge. The Company has elected to pay the 2017 Littelfuse Toll Charge and will elect to pay the 2018
IXYS Toll Charge over the eight-year period prescribed by the Tax Act. For more information see Note 14, Income Taxes, of
the Notes to Consolidated Financial Statements.

(e) Purchase obligations include purchase commitments and commitments for capital expenditures not recognized in the
Company’s Consolidated Balance Sheets.

In addition to the above contractual obligations and commitments, the Company had the following obligations at December 29, 
2018: 

The  Company  has  Company-sponsored  defined  benefit  pension  plans  covering  employees  at  various  non-U.S.  subsidiaries 
including the U.K., Germany, the Philippines, China, Japan, Mexico, Italy and France. At December 29, 2018, the Company had 
a net unfunded status of $32.2 million. The Company expects to make approximately $2.3 million of contributions to the plans in 
2019. For additional information, see Note 11, Benefit Plans, of the Notes to Consolidated Financial Statements.

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. As of December 29, 2018, there was $9.1 million of accrued compensation benefits included in Other long-term 
liabilities. For additional information, see Note 11, Benefit Plans, of the Notes to Consolidated Financial Statements.

As  of  December 29,  2018,  the  Company  recognized  various  accruals  related  to  employee  compensation  including  its  annual 
incentive program that are expected to be paid in 2019.

Due to the uncertainty with respect to the cash outflows, the preceding table excludes unrecognized tax benefits of $18.3 million. 
The Company does not expect to make significant payments of these liabilities within the next year. For additional information, 
see Note 14, Income Taxes, of the Notes to Consolidated Financial Statements.

Off-Balance Sheet Arrangements

As of December 29, 2018, 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.

33

Recent Accounting Pronouncements

Recently issued accounting standards and their estimated effect on the Company’s Consolidated Financial Statements are described 
in Note 1, Summary of Significant Accounting Policies and Other Information, of the Notes to Consolidated Financial Statements.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

The Company is exposed to market risk from changes in interest rates, foreign exchange rates and commodity prices.

Interest Rates

The Company had $155.0 million in debt outstanding at December 29, 2018 related to the unsecured revolving credit facility and 
term loan. Because 100% of this debt has variable interest rates, the Company is subject to future interest rate fluctuations in 
relation to these borrowings which could potentially have a negative impact on cash flows of the Company. A prospective increase 
of 100 basis points in the interest rate applicable to the Company’s outstanding borrowings under its credit facility would result 
in an increase of approximately $1.6 million in annual interest expense. The Company is not party to any currency exchange or 
interest rate protection agreements as of December 29, 2018.

Foreign Exchange Rates

The majority of the company’s operations consist of manufacturing and sales activities in foreign countries. The Company has
operations in China, Germany, Mexico, Philippines, United Kingdom, Japan, Lithuania, Netherlands, Portugal, Singapore, South 
Korea, Spain, and the United States. During 2018, sales to customers outside the U.S. were approximately 70% of total net sales. 
During 2017, sales to customers outside the U.S. were approximately 69% of total net sales. Substantially all sales in Europe are 
denominated in euros and substantially all sales in the Asia-Pacific region are denominated in U.S. dollars, Chinese renminbi, 
Japanese yen, or Korean won.

The company’s foreign exchange exposures result primarily from inter-company loans, external borrowings, sale of products in 
foreign currencies, foreign currency denominated purchases, employee-related and other costs of running operations in foreign 
countries. The company’s most significant foreign currency exposures are to the euro, the Chinese renminbi, Mexican peso, and 
Philippine peso. Changes in foreign exchange rates could affect the company’s sales, costs, balance sheet values and earnings.

At December 29, 2018, the net value of the Company’s assets with exposure to foreign currency risk was approximately $143 
million, with the largest exposure being Japanese yen denominated inter-company loans with a Euro functional currency subsidiary. 
The reduction in earnings from a hypothetical instantaneous 10% adverse change in quoted foreign currency spot rates applied to 
foreign currency sensitive asset instruments would be $14 million at December 29, 2018. At December 29, 2018, the net value of 
the Company’s liabilities with exposure to foreign currency risk was $348 million, with the largest exposure being U.S. Dollar 
denominated  inter-company  loans  with  a  Euro  functional  currency  subsidiary. The  reduction  in  earnings  from  a  hypothetical 
instantaneous 10% adverse change in quoted foreign currency spot rates applied to foreign currency sensitive liability instruments 
would be $35 million at December 29, 2018. As a result of the mix in currencies impacting the hypothetical 10% changes, the 
movements in some instruments would offset movements in other instruments reducing the hypothetical exposure to the Company.

Commodity Prices

The Company uses various metals in the manufacturing of its products, including copper, zinc, tin, gold, and silver. Prices of these 
commodities can rise and result in materially higher costs of producing our products. The Company believes it has adequate 
primary and secondary sources of supply for each of our key materials and that, in periods of rising prices, the Company expects 
to recover a majority of the increased cost in the form of higher selling prices. However, recoveries typically lag the effect of cost 
increases due to the nature of our markets.

The cost of oil has fluctuated dramatically over the past several years. Consequently, there is a risk that a return to high prices for 
oil and electricity in 2019 could have a significant impact on the Company’s transportation and utility expenses.
 While the Company is exposed to significant changes in certain commodity prices and foreign currency exchange rates, the 
Company actively monitors these exposures and may take various actions from time to time to mitigate any negative impacts of 
these exposures. 

34

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

Index

Page

Report of Independent Registered Public Accounting Firm – Consolidated Financial Statements
Report of Independent Registered Public Accounting Firm – Internal Control Over Financial Reporting
Consolidated Financial Statements

Consolidated Balance Sheets
Consolidated Statements of Net Income
Consolidated Statements of Comprehensive Income
Consolidated Statements of Cash Flows
Consolidated Statements of Equity
Notes to Consolidated Financial Statements

1. Summary of Significant Accounting Policies and Other Information
2. Acquisitions and Dispositions
3. Inventories
4. Property, Plant, and Equipment
5. Goodwill and Other Intangible Assets
6. Accrued Liabilities
7. Lease Commitments
8. Restructuring, Impairment and Other Charges
9. Debt
10. Fair Value of Assets and Liabilities
11. Benefit Plans
12. Stock-Based Compensation
13. Other Comprehensive (Loss) Income
14. Income Taxes
15. Earnings Per Share
16. Segment Information
17. Selected Quarterly Financial Data (Unaudited)
18. Related Party Transactions

36
37

38
39
40
41
42

43
51
58
58
59
60
60
61
62
64
67
71
73
74
78
78
81
82

35

Report of Independent Registered Public Accounting Firm

Board of Directors and Shareholders

Littelfuse, Inc.

Opinion on the financial statements
We have audited the accompanying consolidated balance sheets of Littelfuse, Inc. (a Delaware corporation) and subsidiaries (the 
“Company”) as of December 29, 2018 and December 30, 2017, the related consolidated statements of net income, comprehensive 
income, equity, and cash flows for each of the three years in the period ended December 29, 2018, and the related notes and 
financial statement schedule included under Item 15(a) (collectively referred to as the “financial statements”). In our opinion, the 
financial statements present fairly, in all material respects, the financial position of the Company as of December 29, 2018 and 
December 30, 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 29, 
2018, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(“PCAOB”), the Company’s internal control over financial reporting as of December 29, 2018, based on criteria established in 
the  2013  Internal  Control—Integrated  Framework  issued  by  the  Committee  of  Sponsoring  Organizations  of  the  Treadway 
Commission (“COSO”), and our report dated February 22, 2019, expressed an unqualified opinion.

Basis for opinion
These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on 
the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are 
required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable 
rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error 
or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether 
due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, 
evidence supporting the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting 
principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial 
statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ GRANT THORNTON LLP

We have served as the Company’s auditor since 2014.

Chicago, Illinois
February 22, 2019

36

Report of Independent Registered Public Accounting Firm

Board of Directors and Shareholders

Littelfuse, Inc.

Opinion on internal control over financial reporting
We have audited the internal control over financial reporting of Littelfuse, Inc. (a Delaware corporation) and subsidiaries (the 
“Company”) as of December 29, 2018, based on criteria established in the 2013 Internal Control—Integrated Framework issued 
by the Committee of Sponsoring Organizations of the Treadway Commission ("COSO"). In our opinion, the Company maintained, 
in all material respects, effective internal control over financial reporting as of December 29, 2018, based on criteria established 
in the 2013 Internal Control—Integrated Framework issued by COSO.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) 
(“PCAOB”), the consolidated financial statements of the Company as of and for the year ended December 29, 2018, and our report 
dated February 22, 2019 expressed an unqualified opinion on those financial statements.

Basis for opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment 
of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal 
Control over Financial Reporting (“Management’s Report”). Our responsibility is to express an opinion on the Company’s internal 
control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required 
to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and 
regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the 
audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material 
respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material 
weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and 
performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable 
basis for our opinion.

Definition and limitations of internal control over financial reporting
A company’s internal control over financial reporting is a process designed 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. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain 
to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 
assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that 
could have a material effect on the financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ GRANT THORNTON LLP

Chicago, Illinois
February 22, 2019

37

LITTELFUSE, INC.
CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)
ASSETS
Current assets:

Cash and cash equivalents
Short-term investments
Trade receivables, less allowances of $36,038 and $27,516 at December 29, 2018 and
December 30, 2017, respectively
Inventories
Prepaid income taxes and income taxes receivable
Prepaid expenses and other current assets

Total current assets
Net property, plant, and equipment
Intangible assets, net of amortization
Goodwill
Investments
Deferred income taxes
Other assets
Total assets
LIABILITIES AND EQUITY
Current liabilities:
Accounts payable
Accrued liabilities
Accrued income taxes
Current portion of long-term debt

Total current liabilities
Long-term debt, less current portion
Deferred income taxes
Accrued post-retirement benefits
Other long-term liabilities
Shareholders’ equity:

Common stock, par value $0.01 per share: 34,000,000 shares authorized; shares issued,

25,641,959 and 23,153,396 in 2018 and 2017, respectively

Treasury stock, at cost: 868,045 and 439,598 shares, respectively
Additional paid-in capital
Accumulated other comprehensive loss
Retained earnings

Littelfuse, Inc. shareholders’ equity
Non-controlling interest
Total equity
Total liabilities and equity

See accompanying Notes to Consolidated Financial Statements.

38

December 29,
2018

December 30,
2017

$

489,733
34

$

429,676
35

232,892
258,228
2,339
49,291
1,032,517
339,894
361,474
826,715
25,405
7,330
20,971
2,614,306

126,323
138,405
20,547
10,000
295,275
684,730
51,853
31,874
72,232

254
(116,454)
835,828
(97,924)
856,507
1,478,211
131
1,478,342
2,614,306

$

$

$

182,699
140,789
1,689
37,452
792,340
250,577
203,850
453,414
10,993
11,858
17,070
1,740,102

101,844
100,415
16,285
6,250
224,794
489,361
17,069
18,742
62,580

229
(41,294)
310,012
(63,668)
722,140
927,419
137
927,556
1,740,102

$

$

$

LITTELFUSE, INC.
CONSOLIDATED STATEMENTS OF NET INCOME

(in thousands, except per share data)
Net sales
Cost of sales
Gross profit

Selling, general, and administrative expenses
Research and development expenses
Amortization of intangibles
Impairment of goodwill and intangible assets
Total operating expenses
Operating income

Interest expense
Foreign exchange (gain) loss
Other income, net
Income before income taxes
Income taxes
Net income

Income per share:

Basic
Diluted

Weighted average shares and equivalent shares outstanding:

Basic
Diluted

See accompanying Notes to Consolidated Financial Statements.

Fiscal Year Ended

$

December 29,
2018
1,718,468
1,065,927
652,541

$

December 30,
2017
1,221,534
715,001
506,533

$

December 31,
2016
1,056,159
643,042
413,117

288,001
87,301
52,190
—
427,492
225,049

22,569
(863)
(1,599)
204,942
40,377
164,565

6.62
6.52

24,870
25,235

$

$
$

212,833
50,489
24,700
—
288,022
218,511

13,380
2,376
(1,282)
204,037
84,518
119,519

5.27
5.21

22,687
22,931

$

$
$

206,129
42,198
19,337
14,809
282,473
130,644

8,628
472
(1,730)
123,274
18,786
104,488

4.63
4.60

22,559
22,727

$

$
$

39

LITTELFUSE, INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)
Net income
Other comprehensive income (loss):

Pension and postemployment adjustments, net of tax
Unrealized loss on investments
Foreign currency translation adjustments

Comprehensive income

See accompanying Notes to Consolidated Financial Statements.

Year Ended

December 29,
2018
164,565

$

December 30,
2017
119,519

$

December 31,
2016
104,488

$

877
—
(25,338)
140,104

$

1,147
(974)
10,738
130,430

$

(3,261)
(815)
(24,832)
75,580

$

40

LITTELFUSE, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)
OPERATING ACTIVITIES
Net income

Adjustments to reconcile net income to net cash provided by operating activities:

December 29,
2018

Year Ended
December 30,
2017

December 31,
2016

$

164,565

$

119,519

$

104,488

Depreciation

Amortization of intangibles

Impairment charges

Deferred revenue

Non-cash inventory charges

Stock-based compensation

Excess tax benefit on share-based compensation

Deferred income taxes

Other

Changes in operating assets and liabilities:

Trade receivables

Inventories

Accounts payable

Accrued liabilities and income taxes

Prepaid expenses and other assets

Net cash provided by operating activities

INVESTING ACTIVITIES

Acquisitions of businesses, net of cash acquired

Proceeds from sales and maturities of short-term investments

Decrease in entrusted loan

Purchases of property, plant, and equipment

Proceeds from sale of property, plant, and equipment

Net cash used in investing activities

FINANCING ACTIVITIES
Proceeds of revolving credit facility

Proceeds of term loan

Proceeds from senior notes payable

Payments of term loan

Payments of revolving credit facility

Net proceeds (payments) related to stock-based award activities

Payments of entrusted loan

Cash dividends paid

Purchases of common stock

Other

Net cash provided by (used in) financing activities

Effect of exchange rate changes on cash and cash equivalents

Increase (decrease) in cash and cash equivalents

Cash and cash equivalents at beginning of year

Cash and cash equivalents at end of year

 See accompanying Notes to Consolidated Financial Statements.

41

51,003

52,190

2,218

3,965

36,927

27,431

—

(4,679)

(50)

(3,539)

(33,971)

13,708

29,329

(7,269)

331,828

38,311

24,700

—

—

1,607

16,315

—

17,063

6,048

(11,087)

(20,180)

6,494

50,626

19,754

269,170

33,800

19,337

14,809

—

7,834

11,987

(3,421)

(5,269)

3,973

(22,779)

8,539

19,190

(9,644)

(2,711)

180,133

(318,474)

(38,512)

(471,118)

3,739

3,599

(65,925)

962

345

5,510

(46,228)

248

(96,137)

(511,243)

15,000

9,375

125,000

(7,188)

(127,500)

(2,373)

(3,599)

(31,770)

—

(1,626)

(24,681)

6,200

154,552

275,124

367,000

125,000

226,428

(89,688)

(331,500)

20,494

(5,510)

(27,866)

—

(162)

284,196

(6,748)

(53,662)

328,786

275,124

1,407

—

(74,753)

9,572

(382,248)

60,000

75,000

175,000

(42,500)

(60,000)

18,857

—

(39,993)

(63,564)

(903)

121,897

(11,420)

60,057

429,676

$

489,733

$

429,676

$

LITTELFUSE, INC.
CONSOLIDATED STATEMENTS OF EQUITY

Littelfuse, Inc. Shareholders’ Equity

Common
Stock

Addl. Paid
in Capital

$

224

$ 259,553

—

Treasury
Stock

Accum.
Other
Comp. Inc.
Retained
(Loss)
Earnings
$ (32,766) $ (45,671) $ 557,769
— 104,488

—

7,471

—

(28,908)
—

—

(3,744)

—

—

—

24,234

—

—

—

—
—
— (27,866)
$ (36,510) $ (74,579) $ 634,391
— 119,519

—

Non-
controlling
Interest

Total

$

143

$ 739,252

—

—

—

—

—

$

143

—

$

—
(6)

—

—

—

137

—

—

—
(6)

—

—

—
—

—

$

131

104,488
(28,908)
7,471

(3,744)

24,238
(27,866)
$ 814,931

119,519
10,911

16,315
(6)

(4,784)
2,440
(31,770)
$ 927,556

164,565
(24,461)
—

27,431
(6)

(7,252)
26,109

472,301
(67,908)
(39,993)
$1,478,342

10,911

—

—

—

—

—

—

—

—

(4,784)
—

—

—
—
— (31,770)
$ (41,294) $ (63,668) $ 722,140
— 164,565

—

(24,461)
(9,795)
—

—

—

—

—

—

—

(7,252)
—

9,795

—

—

—

—

—
(67,908)
—

—
—
—
—
— (39,993)
$(116,454) $ (97,924) $ 856,507

(in thousands, except share and per share data)

Balance at January 2, 2016

Net income

Other comprehensive income, net of tax

Stock-based compensation

Withheld 31,040 shares on restricted
share units for withholding taxes

Stock options exercised, including tax
impact of ($7,400)

Cash dividends paid ($1.24 per share)

—

—

—

4

—

Balance at December 31, 2016

$

228

$ 291,258

Net income
Other comprehensive income, net of tax

Stock-based compensation

Non-controlling interest

Withheld 30,459 shares on restricted
share units for withholding taxes

Stock options exercised

Cash dividends paid ($1.40 per share)

—

—

—

—

1

—

—

16,315

—

—

2,439

—

Balance at December 30, 2017

$

229

$ 310,012

Net income

Other comprehensive income, net of tax

Cumulative effect adjustment

Stock-based compensation

Non-controlling interest

Withheld 36,482 shares on restricted
share units for withholding taxes

Stock options exercised

Issuance of common stock
Repurchases of common stock

Cash dividends paid ($1.60 per share)

—

—

—

—

—

4

21
—

—

—

—

27,431

—

—

26,105

472,280
—

—

Balance at December 29, 2018

$

254

$ 835,828

See accompanying Notes to Consolidated Financial Statements.

42

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Summary of Significant Accounting Policies and Other Information

Nature of Operations 

Littelfuse, Inc. and subsidiaries (the “Company”) is a global manufacturer of leading technologies in circuit protection, power 
control and sensing. The company's  products are found in automotive and commercial vehicles, industrial applications, data and 
telecommunications,  medical  devices,  consumer  electronics  and  appliances.  With  its  broad  product  portfolio  of  fuses, 
semiconductors, polymers, ceramics, relays and sensors, and extensive global infrastructure, the Company’s worldwide associates 
partner with its customers to design, manufacture and deliver innovative, high-quality solutions for a safer, greener and increasingly 
connected world.

Fiscal Year 

References herein to “2018”, “fiscal 2018” or “fiscal year 2018” refer to the fiscal year ended December 29, 2018. References 
herein to “2017”, “fiscal 2017” or “fiscal year 2017” refer to the fiscal year ended December 30, 2017. References herein to “2016”, 
“fiscal 2016” or “fiscal year 2016” refer to the fiscal year ended December 31, 2016. The Company operates on a 52-53 week 
fiscal year (4-4-5 basis) ending on the Saturday closest to December 31. 

Basis of Presentation 

The Consolidated Financial Statements include the accounts of Littelfuse, Inc. and its subsidiaries. All significant intercompany 
accounts and transactions have been eliminated. The company’s Consolidated Financial Statements were prepared in accordance 
with generally accepted accounting principles in the United States of America and include the assets, liabilities, sales and expenses 
of all wholly-owned subsidiaries and majority-owned subsidiaries over which the Company exercises control.

Use of Estimates 

The  process  of  preparing  financial  statements  in  conformity  with  U.S.  generally  accepted  accounting  principles  requires 
management to make estimates and assumptions that affect the amounts of assets and liabilities at the date of the Consolidated 
Financial Statements, and the reported amounts of revenues and expenses and the accompanying notes. The Company evaluates 
and updates its assumptions and estimates on an ongoing basis and may employ outside experts to assist in its evaluation, as 
considered necessary. Actual results could differ from those estimates.

Cash Equivalents

All  highly  liquid  investments,  with  an  original  maturity  of  three  months  or  less  when  purchased,  are  considered  to  be  cash 
equivalents.

Short-Term and Long-Term Investments

As  of  December 29,  2018,  the  Company  has  an  investment  in  Polytronics Technology  Corporation  Ltd.  (“Polytronics”). The 
Company’s Polytronics shares held at the end of fiscal 2018 and 2017 represent approximately 7.2% of total Polytronics shares 
outstanding. The Polytronics investment is classified as available-for-sale and is carried at fair value. The fair value of the Polytronics 
investment was €8.9 million (approximately $10.2 million) at December 29, 2018 and €9.2 million (approximately $11.0 million) 
at December 30, 2017.

As a result of the Company’s acquisition of IXYS, the Company has equity ownerships in various investments that are accounted 
for under the equity method. The Company owns 45% of the outstanding equity of Powersem GmbH, a module manufacturer 
based in Germany, approximately 20% of the outstanding equity of EB Tech Ltd., a company with expertise in radiation technology 
based in South Korea, and approximately 24% of the outstanding common shares of Automated Technology, Inc., a supplier located 
in the Philippines that provides assembly and test services. All equity-level investments are less than majority owned. The Company 
recognized $0.7 million in gains from its equity method investments for the fiscal year ended December 29, 2018. The balance of 
these investments under the equity method was $11.6 million as of the fiscal year ended December 29, 2018. See Note 18, Related 
Party Transactions, for further discussion.

The Company has certain investments that are accounted for under the cost method that have a balance of investments under 
the cost method was $7.9 million as of the fiscal year ended December 29, 2018.

43

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

In January 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-01, 
“Financial  Instruments-Recognition  and  Measurement  of  Financial Assets  and  Financial  Liabilities”  which  addressed  certain 
aspects of the recognition, measurement, presentation and disclosure of financial instruments. The ASU requires the Company to 
recognize any changes in the fair value of certain equity investments in net income. Previously these changes were recognized in 
other comprehensive income ("OCI"). The Company adopted the new standard on December 31, 2017, on a modified retrospective 
basis, recognizing the cumulative effect as a $9.8 million increase to retained earnings. As a result of the adoption of the new 
standard and change in fair value of our equity investments, for the twelve months ended December 29, 2018, the Company 
recognized an unrealized loss of $0.7 million in Other income, net in the Consolidated Statements of Net Income.

The Company has investments related to its non-qualified Supplemental Retirement and Savings Plan. The Company maintains 
accounts for participants through which participants make investment elections. The investment securities are subject to the 
claims of the Company’s creditors. The investment securities are all mutual funds with readily determinable fair values and are 
classified as trading securities. The investment securities are measured at fair value. As of December 29, 2018 and 
December 30, 2017, there was $9.1 million and $8.0 million of marketable securities, respectively, related to the plan included 
in Other assets on the Consolidated Balance Sheets.

Trade Receivables

The Company performs credit evaluations of customers’ financial condition and generally does not require collateral. Credit losses 
are provided for in the financial statements based upon specific knowledge of a customer’s inability to meet its financial obligations 
to the Company. Historically, credit losses have consistently been within management’s expectations and have not been a material 
amount. A receivable is considered past due if payments have not been received within agreed upon invoice terms. Write-offs are 
recorded at the time a customer receivable is deemed uncollectible.

The Company also maintains allowances against trade receivables for the settlement of rebates and sales discounts to customers. 
These allowances are based upon specific customer sales and sales discounts as well as actual historical experience.

Inventories

Inventories are stated at the lower of cost or net realizable value, which approximates current replacement cost. Cost is principally 
determined using the first-in, first-out method. The Company maintains excess and obsolete allowances against inventory to reduce 
the  carrying  value  to  the  expected  net  realizable  value. These  allowances  are  based  upon  a  combination  of  factors  including 
historical sales volume, market conditions, lower of cost or market analysis and expected realizable value of the inventory.

Property, Plant, and Equipment

Land, buildings, and equipment are carried at cost. Depreciation is calculated using the straight-line method with useful lives of 
21 years for buildings, seven to ten years for equipment, seven years for furniture and fixtures, five years for tooling and three 
years  for  computer  equipment.  Leasehold  improvements  are  depreciated  over  the  lesser  of  their  useful  life or  the  lease  term. 
Maintenance and repair costs are charged to expense as incurred. Major overhauls that extend the useful lives of existing assets 
are capitalized.

Goodwill

The Company annually tests goodwill for impairment on the first day of its fiscal fourth quarter, or more frequently if an event 
occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value.

The Company compares each reporting unit’s fair value, estimated based on comparable company market valuations and expected 
future discounted cash flows to be generated by the reporting unit, to its carrying value. For the seven reporting units with goodwill, 
the Company compared the estimated fair value of each reporting unit to its carrying value. The results of the goodwill impairment 
test as of October 1, 2018 indicated that the estimated fair values for each of the seven reporting units exceeded their respective 
carrying values. As of the most recent annual test conducted on October 1, 2018, the Company noted that the excess of fair value 
over the carrying value, was 176%, 80%, 233%, 202%, 63%, 114%, and 370% for its reporting units; Electronics-Passive Products 
and Sensors, Electronics-Semiconductor, Passenger Car Products, Commercial Vehicle Products, Automotive Sensors, Relays, 
and Power Fuse, respectively. Relatively small changes in the Company’s key assumptions would not have resulted in any reporting 
units failing the goodwill impairment test. See Note 5, Goodwill and Other Intangible Assets, for additional information.

44

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The Company also performs an interim review for indicators of impairment each quarter to assess whether an interim impairment 
review is required for any reporting unit. As part of its interim reviews, management analyzes potential changes in the value of 
individual reporting units based on each reporting unit’s operating results for the period compared to expected results as of the 
prior year’s annual impairment test. In addition, management considers how other key assumptions, including discount rates and 
expected long-term growth rates, used in the last annual impairment test, could be impacted by changes in market conditions and 
economic events. Based on the interim assessments as of December 29, 2018, management concluded that no events or changes 
in circumstances indicated that it was more likely than not that the fair value for any reporting unit had declined below its carrying 
value.

Long-Lived Assets

Customer relationships, trademarks and tradenames are amortized using the straight-line method over estimated useful lives that 
have a range of five to 20 years. Patents, licenses and software are amortized using the straight-line method or an accelerated 
method over estimated useful lives that have a range of five to 17 years. The distribution networks are amortized on either a straight-
line or accelerated basis over estimated useful lives that have a range of three to 20 years.

The Company assesses potential impairments to its long-lived assets if events or changes in circumstances indicate that the carrying 
amount of an asset may not be recoverable. An impaired asset is written down to its estimated fair value based upon the most 
recent information available. Estimated fair market value is generally measured by discounting estimated future cash flows. Long-
lived assets, other than goodwill and other intangible assets, that are held for sale are recorded at the lower of carrying value or 
the fair market value less the estimated cost to sell.

During the fiscal year ended December 31, 2016, the Company recognized non-cash impairment charges totaling $6.0 million, of 
which $2.2 million related to the impairment of certain customer relationship intangible assets in the Custom Products reporting 
unit within the Industrial segment and $3.8 million related to the impairment of the Custom Products tradename. The impairment 
of  the  customer  relationship  intangible  assets  resulted  from  lower  expectations  of  future  revenue  to  be  derived  from  those 
relationships  while  the  tradename  impairment  resulted  from  lower  expectations  of  future  cash  flows  of  the  Custom  Products 
reporting unit.

Environmental Liabilities

Environmental liabilities are accrued based on engineering studies estimating the cost of remediating sites. Expenses related to 
on-going maintenance of environmental sites are expensed as incurred. If actual or estimated probable future losses exceed the 
Company’s recorded liability for such claims, the Company would record additional charges during the period in which the actual 
loss or change in estimate occurred.

Pension and Other Post-retirement Benefits

The Company records annual income and expense amounts relating to its pension and post-retirement benefits plans based on 
calculations  which  include  various  actuarial  assumptions  including  discount  rates,  expected  long-term  rates  of  return  and 
compensation increases. The Company reviews its actuarial assumptions on an annual basis as of the fiscal year-end balance sheet 
date (or more frequently if a significant event requiring remeasurement occurs) and modifies the assumption based on current rates 
and trends when it is appropriate to do so. The effects of modifications are recognized immediately on the Consolidated Balance 
Sheets, but are generally amortized into operating earnings over future periods, with the deferred amount recorded in accumulated 
other comprehensive income (loss). The Company believes that the assumptions utilized in recording its obligations under its plans 
are reasonable based on its experience, market conditions and input from its actuaries and investment advisors.

Revenue Recognition

Adoption

On  December  31,  2017,  the  Company  adopted  new  guidance  on  revenue  from  contracts  with  customers  using  the  modified 
retrospective method. The adoption did not have a significant impact on the Company’s consolidated financial statements.

Revenue Disaggregation

The following table disaggregates the Company’s revenue by primary business units for the fiscal year ended December 29, 2018:

45

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands)

Electronics – Semiconductor

Electronics – Passive Products and Sensors

Passenger Car Products

Commercial Vehicle Products

Automotive Sensors

Industrial Products

Total

Fiscal Year Ended December 29, 2018

Electronics
Segment

Automotive
Segment

Industrial
Segment

Total

$

648,967

$

475,329

— $

—

— $

648,967

240,501

121,562

117,728

—

—

—

—

—

114,381

—

—

—

—

475,329

240,501

121,562

117,728

114,381

$ 1,124,296

$

479,791

$

114,381

$ 1,718,468

See Note 16, Segment Information, for net sales by segment and countries.

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  has  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 has 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. This is 
similar to the Company’s prior practice and therefore the effect of the new guidance is immaterial.

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 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.

46

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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.

Allowance for Doubtful Accounts

The Company evaluates the collectability of its trade receivables based on a combination of factors. The Company regularly 
analyzes its significant customer accounts and, when the Company becomes aware of a specific customer’s inability to meet its 
financial obligations, the Company records a specific reserve for bad debt to reduce the related receivable to the amount the 
Company reasonably believes is collectible. The Company also records allowances for all other customers based on a variety of 
factors including the length of time the receivables are past due, the financial health of the customer, macroeconomic considerations 
and past experience. Historically, the allowance for doubtful accounts has been adequate to cover bad debts. If circumstances 
related to specific customers change, the estimates of the recoverability of receivables could be further adjusted.

Advertising Costs

The Company expenses advertising costs as incurred, which amounted to $2.8 million in fiscal year 2018 and $2.9 million in both 
fiscal year 2017 and 2016, respectively, and are included as a component of selling, general, and administrative expenses.

Shipping and Handling Fees and Costs

Amounts billed to customers related to shipping and handling is classified as revenue. Costs incurred for shipping and handling 
of $12.3 million, $10.9 million, and $9.1 million in fiscal year 2018, 2017, and 2016, respectively, are classified in selling, general, 
and administrative expenses.

Foreign Currency Translation / Remeasurement

The Company’s foreign subsidiaries use the local currency or the U.S. dollar as their functional currency, as appropriate. Assets 
and liabilities are translated using exchange rates at the balance sheet date, and revenues and expenses are translated at weighted 
average rates. The amount of foreign currency gain or loss from remeasurement recognized in the income statement was a gain 
of $0.9 million in fiscal year 2018, a loss of $2.4 million in fiscal year 2017, and a loss of $0.5 million in fiscal year 2016. 
Adjustments  from  the  translation  process  are  recognized  in  “Shareholders’  equity”  as  a  component  of  “Accumulated  other 
comprehensive loss.”

Stock-based Compensation

The Company recognizes compensation expense for the cost of awards of equity compensation using a fair value method. Benefits 
of tax deductions in excess of recognized compensation expense are reported as operating cash flows. See Note 12, Stock-Based 
Compensation, for additional information on stock-based compensation.

Coal Mining Liability

Included in other long-term liabilities is an accrual related to former coal mining operations at Littelfuse GmbH (formerly known 
as Heinrich Industries, AG) for the amounts of €1.1 million ($1.3 million) and €0.9 million ($1.1 million) at December 29, 2018
and December 30, 2017, respectively. Management, in conjunction with an independent third-party, performs an annual evaluation 
of the former coal mining operations in order to develop an estimate of the probable future obligations in regard to remediating 
the dangers (such as a shaft collapse) of abandoned coal mine shafts in the former coal mining operations. Management accrues 
for costs associated with such remediation efforts based on management's best estimate when such costs are probable and reasonably 
able to be estimated. The ultimate determination can only be done after respective investigations because the concrete conditions 
are mostly unknown at this time.

Other Income, Net

Other income, net generally consists of interest income, royalties, change in fair value of available-for-sale securities, pension 
non-service costs and other non-operating expense (income).

47

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Income Taxes

The Company accounts for income taxes using the liability method. Deferred taxes are recognized for the future effects of temporary 
differences between financial and income tax reporting using enacted tax rates in effect for the years in which the differences are 
expected to reverse. The Company recognizes deferred taxes for temporary differences, operating loss carryforwards, and tax 
credit and other tax attribute carryforwards (excluding carryforwards where usage has been determined to be remote). Deferred 
tax assets are reduced by a valuation allowance if it is more likely than not that some portion, or all, of the deferred tax assets will 
not be realized. U.S. state and non-U.S. income taxes are provided on the portion of non-U.S. income that is expected to be remitted 
to the U.S. and be taxable (and non-U.S. income taxes are provided on the portion of non-U.S. income that is expected to be 
remitted to an upper-tier non-U.S. entity). Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and 
rates on the date of enactment.

Deferred U.S. income taxes and non-U.S. taxes are not provided on the excess of the investment value for financial reporting over 
the tax basis of investments in those non-U.S. subsidiaries for which such excess is considered to be permanently reinvested in 
those operations. Management regularly evaluates whether non-U.S. earnings are expected to be permanently reinvested. This 
evaluation requires judgment about the future operating and liquidity needs of the Company and its non-U.S. subsidiaries.  Changes 
in economic and business conditions, non-U.S. or U.S. tax laws, or the Company’s financial situation could result in changes to 
these judgments and the need to record additional tax liabilities.

The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will 
be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized 
in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood 
of being realized upon ultimate settlement.

On December 22, 2017, the U.S. enacted legislation commonly referred to as the Tax Cuts and Jobs Act (the "Tax Act"). Among 
other things, the Tax Act reduces the U.S. corporate federal income tax rate from 35% to 21%, adds base broadening provisions 
which limit deductions and address excessive international tax planning, imposes a one-time tax (the “Toll Charge”) on accumulated 
earnings of certain non-U.S. subsidiaries and enables repatriation of earnings of non-U.S. subsidiaries free of U.S. federal income 
tax. Other than the Toll Charge (which, except for the IXYS impact, was applicable to the Company for 2017), the provisions are 
generally applicable to the Company in 2018 and beyond.

In accordance with the guidance provided in SEC Staff Accounting Bulletin (“SAB”) No. 118, in the fourth quarter of 2017 the 
Company recorded a charge of $47.0 million as a provisional reasonable estimate of the impact of the Tax Act, including $49.0 
million for the Toll Charge net of $2.0 million for other net tax benefits. In the fourth quarter of 2018, within the measurement 
period outlined in SAB No. 118, the Company finalized its estimates of the impact of the Tax Act as of December 30, 2017 and 
recorded a charge of $3.2 million, including $2.3 million for the Toll Charge and $0.9 million for the net impact of other items. 
In addition, the Company recorded $7.0 million for the Toll Charge associated with IXYS as part of the IXYS acquisition purchase 
price allocation. This was reflected in the opening balance sheet as an increase to goodwill and other long-term liabilities.

Although certain administrative guidance has been issued, including final and proposed regulations, the appropriate application 
of many provisions of the Tax Act remain uncertain. The Company used its best judgment as to the application of these provisions 
in determining its final estimates of the impact of the Tax Act as of December 30, 2017, the Toll Charge associated with the IXYS 
acquisition as well as the Company’s income tax expense for the year ended December 29, 2018. Adjustments to income tax 
expense may be necessary in future periods if provisions of the Tax Act, and their interaction with other provisions of the U.S. 
Internal Revenue Code, are interpreted differently than interpretations made by the Company, whether through issuance of additional 
administrative guidance, or through further review of the Tax Act by the Company and its advisors. In this regard, on January 15, 
2019, final regulations were issued addressing the Toll Charge (replacing the proposed regulations issued in August of 2018). The 
Company is evaluating these final regulations and has yet to determine their impact.

The Company has elected to pay the 2017 Littelfuse Toll Charge and will elect to pay the 2018 IXYS Toll Charge over the eight-
year period prescribed by the Tax Act. The long-term portion of these Toll Charges totaling $28.8 million (which includes the 
Littelfuse and IXYS Toll Charges, partially offset by foreign tax credits, the tax benefit of current year losses and the actual 2018 
and anticipated 2019 annual installment payments) is recorded in Other long-term liabilities on the Consolidated Balance Sheet 
as of December 29, 2018. The anticipated 2019 annual installment payments are included in accrued income taxes.

One of the base broadening provisions of the Tax Act is the tax on the global intangible low-taxed income ("GILTI") commonly 
referred to as the “GILTI” provisions. In accordance with guidance issued by the FASB staff, the Company has adopted an accounting 
policy to treat any GILTI inclusions as a period cost if and when incurred. Thus, for the year ended December 29, 2018, deferred 

48

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

taxes were computed without consideration of the possible future impact of the GILTI provisions, and any current year impact 
was recorded as a part of the current portion of income tax expense.

Fair Value Measurements

Certain assets and liabilities are required to be recorded at fair value on a recurring basis. Fair value is determined based on the 
exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous 
market for the asset or liability in an orderly transaction between market participants. The Company records the fair value of its 
available-for-sale securities and pension plan assets on a recurring basis. Assets measured at fair value on a nonrecurring basis 
include long-lived assets held and used, long-lived assets held for sale, goodwill and other intangible assets. The fair value of cash 
and cash equivalents, accounts receivable, short-term debt and accounts payable approximate their carrying values. The three-tier 
value hierarchy, which prioritizes valuation methodologies based on the reliability of the inputs, is:

Level 1 – Valuations based on quoted prices for identical assets and liabilities in active markets.

Level 2 – Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for 
similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that 
are not active, or other inputs that are observable or can be corroborated by observable market data.

Level 3 – Valuations based on unobservable inputs reflecting the Company’s own assumptions, consistent with reasonably 
available assumptions made by other market participants.

Recently Adopted Accounting Standards

In January 2018, the FASB released guidance on the accounting for the GILTI provisions of the 2017 U.S. Tax Act. The GILTI 
provisions impose a tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. The guidance 
indicates that either accounting for deferred taxes related to GILTI inclusions or treating any taxes on GILTI inclusions as period 
cost are both acceptable methods subject to an accounting policy election. The Company has adopted an accounting policy to treat 
any GILTI inclusions as a period cost if and when incurred. Thus, for the year ended December 29, 2018, deferred taxes were 
computed without consideration of the possible future impact of the GILTI provisions, and any current year impact was recorded 
as a part of the current portion of income tax expense.

In March 2017, the FASB issued  ASU No. 2017-07 “Compensation-Retirement Benefits (Topic 715): Improving the Presentation 
of Net Periodic Pension Cost and Net Periodic Post-Retirement Benefit Cost,” which changed the presentation of net periodic 
pension and post-retirement benefit cost (net benefit cost) within the Statement of Income. Under the previous guidance, net benefit 
cost was reported as an employee cost within operating income. The amendment required the bifurcation of net benefit cost, with 
the service cost component to be presented with other employee compensation costs in operating income while the other components 
will be reported separately outside of income from operations. ASU No. 2017-07 was effective for the first quarter of 2018 with 
the Company adopting the new standard on December 31, 2017.

In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments-Recognition and Measurement of Financial Assets 
and Financial Liabilities” which addressed certain aspects of the recognition, measurement, presentation and disclosure of financial 
instruments.The ASU requires the Company to recognize any changes in the fair value of certain equity investments in net income. 
Previously these changes were recognized in other comprehensive income ("OCI"). The Company adopted the new standard on 
December 31, 2017, on a modified retrospective basis, recognizing the cumulative effect as a $9.8 million increase to retained 
earnings. As a result of the adoption of the new standard and change in fair value of our equity investments, for the twelve months 
ended December 29, 2018, the Company recognized an unrealized loss of $0.7 million in Other income, net in the Consolidated 
Statements of Net Income.

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers” (Topic 606) which supersedes the 
revenue recognition requirements in ASC 605, “Revenue Recognition.” This ASU provides a single comprehensive model for 
entities to use in accounting for revenue arising from contracts with customers and will supersede most current revenue recognition 
guidance. The guidance permits two implementation approaches, one requiring retrospective application of the new standard with 
restatement of prior years and one requiring prospective application of the new standard with disclosure of results under old 
standards. The Company adopted the new standard on December 31, 2017 using the modified retrospective method, however, no 
adjustment to retained earnings was needed. The new guidance did not have a material effect on the Company’s Consolidated 
Statements of Net Income. See the Revenue Recognition section above for further discussion.

49

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes” (Topic 740). This ASU update requires entities to recognize 
the income tax consequences of many intercompany asset transfers at the transaction date. The seller and buyer will immediately 
recognize the current and deferred income tax consequences of an intercompany transfer of an asset other than inventory. The tax 
consequences were previously deferred. The Company adopted the new standard on December 31, 2017 and it did not have a 
material impact.

Recently Issued Accounting Standards

In February 2016, the FASB issued ASU No. 2016-02, "Leases" (Topic 842). This ASU requires lessees to recognize, on the balance 
sheet, assets and liabilities for the rights and obligations created by leases of greater than twelve months. The accounting by lessors 
will remain largely unchanged. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after 
December 15, 2018, with early adoption permitted. Adoption requires using a modified retrospective transition with either 1) 
periods prior to the adoption date being recast or 2) a cumulative-effect adjustment recognized to the opening balance of retained 
earnings on the adoption date with prior periods not recast.The Company adopted the standard on December 30, 2018 under the 
modified retrospective transition method with the cumulative-effect adjustment recognized to the retained earnings. The new 
standard provides a number of optional practical expedients in transition. The Company has elected the ‘package of practical 
expedients’,  which  permits  it  not  to  reassess  under  the  new  standard  our  prior  conclusions  about  lease  identification,  lease 
classification and initial direct costs. The Company has not elected the use-of-hindsight.The Company assessed its portfolio of 
leases and compiled a central repository of all active leases. Key lease data elements have been evaluated including developing a 
methodology for determining the incremental borrowing rate across all countries where we have operations. The Company has 
implemented a new leasing software and is in the process of assessing the design of the future lease process and drafting a policy 
to address the new standard requirements.  While the Company is continuing to assess the potential impacts of ASU 2016-02, the 
Company estimates that the adoption of ASU 2016-02 will result in the recognition of right-of-use assets of approximately $27 
million  and  related  lease  liabilities  for  operating  leases  on  its  Consolidated  Balance  Sheets,  with  no  material  impact  to  its 
Consolidated Statements of Net Income.

In  February  2018,  the  FASB  issued ASU  No.  2018-02  “Income  Statement—Reporting  Comprehensive  Income  (Topic  220): 
Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which permits the reclassification of 
tax effects stranded in accumulated other comprehensive income to retained earnings as a result of the Tax Act. The standard also 
requires entities to disclose whether or not they elected to reclassify the tax effects related to the Tax Act as well as their policy 
for releasing income tax effects from accumulated other comprehensive income. The standard allows the option of applying either 
a retrospective adoption, meaning the standard is applied to all periods in which the effect of the Tax Act is recognized, or applying 
the amendments in the period of adoption, meaning an adjustment is made to shareholder’s equity as of the beginning of the 
reporting period. ASU 2018-02 will be effective in the first quarter of 2019; however early adoption is permitted for interim and 
annual periods, including the reporting period in which the Tax Act was enacted. The adoption of this guidance will not have a 
material effect on our Consolidated Financial Statements.

In August 2018, the FASB issued ASU No. 2018-13, "Fair Value Measurement (Topic 820): Disclosure Framework - Changes to 
the Disclosure Requirements for Fair Value Measurement." ASU 2018-13 modified the disclosure requirements in Topic 820, "Fair 
Value Measurement," based on the FASB Concepts Statement, "Conceptual Framework for Financial Reporting - Chapter 8: Notes 
to Financial Statements," including consideration of costs and benefits. The guidance is effective for fiscal years beginning after 
December 15, 2019 and for interim periods within those fiscal years, with early adoption permitted. The company is currently 
evaluating the potential effects of this guidance on its Consolidated Financial Statements.

In August 2018, the FASB issued ASU No. 2018-14 "Disclosure Framework - Changes to the Disclosure Requirements for Defined 
Benefit Plans, which amends ASC 715-20, Compensation - Retirement Benefits - Defined Benefit Plans - General. The amended 
guidance modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans 
by removing and adding certain disclosures for these plans. The eliminated disclosures include (a) the amounts in  OCI expected 
to be recognized in net periodic benefit costs over the next fiscal year, and (b) the effects of a one percentage point change in 
assumed health care cost trend rates on the net periodic benefit costs and the benefit obligation for post-retirement health care 
benefits. Additional disclosures include descriptions of significant gains and losses affecting the benefit obligation for the period. 
This guidance will be effective for financial statements issued for fiscal years ending after December 15, 2020. The adoption of 
this guidance will modify our disclosures but will not have a material effect on our Consolidated Financial Statements.

In August 2018, the FASB issued ASU No. 2018-15, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): 
Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (a 
consensus of the FASB Emerging Issues Task Force).” ASU 2018-15 aligns the requirements for capitalizing implementation costs 
incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred 

50

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The guidance 
is effective for fiscal years beginning after December 15, 2019 and for interim periods within those fiscal years, with early adoption 
permitted. The Company is currently evaluating this guidance on its Consolidated Financial Statements.

2. Acquisitions and Dispositions

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.

IXYS Corporation

On January 17, 2018, the Company acquired IXYS Corporation (“IXYS”), a global pioneer in the power semiconductor and 
integrated circuit markets with a focus on medium to high voltage power semiconductors across the industrial, communications, 
consumer and medical markets. IXYS has a broad customer base, serving more than 3,500 customers through its direct sales force 
and global distribution partners. The acquisition of IXYS is expected to accelerate the Company’s growth across the power control 
market driven by IXYS’s extensive power semiconductor portfolio and technology expertise. With IXYS, the Company will be 
able to diversify and expand its presence within industrial electronics markets, leveraging the strong IXYS industrial OEM customer 
base. The Company also expects to increase long-term penetration of its power semiconductor portfolio in automotive markets, 
expanding its global content per vehicle.

Upon completion of the acquisition, at IXYS stockholders’ election and subject to proration, each share of IXYS common stock, 
par  value  $0.01  per  share,  owned  immediately  prior  to  the  effective  time  were  canceled  and  extinguished  and  automatically 
converted into the right to receive: (i) $23.00 in cash (subject to applicable withholding tax), without interest (referred to as the 
cash consideration), or (ii) 0.1265 of a share of common stock, par value $0.01 per share, of Littelfuse (referred to as the stock 
consideration).  IXYS  stockholders  received  cash  in  lieu  of  any  fractional  shares  of  Littelfuse  common  stock  that  the  IXYS 
stockholders would otherwise have been entitled to receive. Additionally, each outstanding option to purchase shares of IXYS 
common stock granted under an IXYS equity plan were assumed by Littelfuse and converted into an option to acquire (i) a number 
of shares of Littelfuse common stock equal to the number of shares of IXYS common stock subject to such option immediately 
prior to the effective time multiplied by 0.1265, rounded down to the nearest whole share, with (ii) an exercise price per share of 
Littelfuse common stock equal to the exercise price of such IXYS stock option immediately prior to the effective time divided by 
0.1265, rounded up to the nearest whole cent.

Based on the $207.5 per share opening price of Littelfuse common stock on January 17, 2018, the consideration IXYS stockholders 
received in exchange of their IXYS common stock in the acquisition had a value of $814.8 million comprised of $380.6 million
of cash and $434.2 million of Littelfuse stock. In addition to the consideration transferred related to IXYS common stock, the 
value of consideration transferred, and included in the purchase price, related to IXYS stock options that were converted to Littelfuse 
stock options, or cash settled, had a value of $41.7 million. As a result, total consideration was valued at $856.5 million.

The total purchase price of $856.5 million has been allocated to assets acquired and liabilities assumed, as of the completion of 
the acquisition, based on  estimated fair values. The following table summarizes the purchase price allocation of the fair value of 
assets acquired and liabilities assumed in the IXYS acquisition: 

51

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands)

Total purchase consideration:

Cash, net of cash acquired

Cash settled stock options

Littelfuse stock

Converted stock options

Total purchase consideration

Allocation of consideration to assets acquired and liabilities assumed:

Current assets, net

Property, plant, and equipment

Intangible assets

Goodwill

Other non-current assets

Other non-current liabilities

Purchase Price
Allocation

302,865

3,622

434,192

38,109

778,788

155,930

77,442

212,720

382,360

28,706
(78,370)
778,788

Approximately  $49.1  million  of  net  receivables  was  included  in  IXYS’s  current  assets, All  IXYS  goodwill,  other  assets  and 
liabilities were recorded in the Electronics segment and primarily reflected in the Americas and European geographic areas. The 
goodwill  resulting  from  this  acquisition  consists  largely  of  the  Company’s  expected  future  product  sales  and  synergies  from 
combining IXYS’s products and technology with the Company’s existing electronics product portfolio. Goodwill resulting from 
the IXYS acquisition is not expected to be deductible for tax purposes. The Company recorded $7.0 million for the Toll Charge 
associated with IXYS as part of the IXYS acquisition purchase price allocation (this reflects a reduction of $1.0 million recorded 
in the fourth quarter of 2018 and $2.0 million recorded in the third quarter of 2018 as a consequence of revisions to the Company’s 
original estimates. For additional information, see Note 14, Income Taxes. As a result of the Company completing its fair value 
analysis, in the fourth quarter of 2018, the company recorded a reduction of $2.6 million in certain investments held by IXYS. 

Included in the Company’s Consolidated Statements of Net Income for the fiscal year ended December 29, 2018 are net sales of 
approximately $378.2 million, and loss before income taxes of $22.2 million, since the January 17, 2018 acquisition of IXYS. 
The Company recognized approximately $11.9 million of stock compensation expense related to IXYS stock options converted 
to Littelfuse stock options during the fiscal year ended December 29, 2018, of which $4.5 million was recognized immediately 
as it related to prior service periods.

As required by purchase accounting rules, the Company recorded a $36.9 million step-up of inventory to its fair value as of the 
acquisition date based on the preliminary valuation. The step-up was fully amortized as a non-cash charge to cost of goods sold 
during the first and second quarters of 2018, as the acquired inventory was sold, and reflected as other non-segment costs.

During the fiscal year ended December 29, 2018, the Company incurred approximately $11.0 million of legal and professional 
fees related to this acquisition which were primarily recognized as selling, general, and administrative expenses. These costs 
were reflected as other non-segment costs.

2017 Acquisitions

U.S. Sensor

On July 7, 2017, the Company acquired the assets of U.S. Sensor Corporation (“U.S. Sensor”). The acquisition purchase price of 
$24.3 million, net of the finalization of an income tax gross up which was settled in the fourth quarter of 2017, was funded with 
available cash. The acquired business expands the Company’s existing sensor portfolio in several key electronics and industrial 
end markets. U.S. Sensor manufactures a variety of high quality negative temperature coefficient thermistors as well as thermistor 
probes and assemblies. Product lines also include thin film platinum resistance temperature detectors (“RTDs”) and RTD assemblies.

The following table summarizes the purchase price allocation of the fair value of assets acquired and liabilities assumed in the 
U.S. Sensor acquisition:

52

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands)
Total purchase consideration:

Cash

Allocation of consideration to assets acquired and liabilities assumed:

Current assets, net
Patented and unpatented technologies
Trademarks and tradenames
Non-compete agreement
Customer relationships
Goodwill
Current liabilities

Purchase Price
Allocation

$

$

$

24,340

4,635
1,090
200
50
2,830
16,075
(540)
24,340

Included in U.S. Sensor’s current assets, net was approximately $1.5 million of receivables. All U.S. Sensor goodwill, other assets 
and liabilities were recorded in the Electronics segment and reflected in the United States geographic area. The goodwill resulting 
from this acquisition consists largely of the Company’s expected future product sales and synergies from combining U.S. Sensor’s 
products and technology with the Company’s existing electronics product portfolio. Goodwill for the above acquisition is expected 
to be deductible for tax purposes.

As required by purchase accounting rules, the Company recorded a $1.6 million step-up of inventory to its fair value as of the 
acquisition date based on the preliminary valuation. The step-up was amortized as a non-cash charge to cost of goods sold during 
the third quarter of 2017, as the acquired inventory was sold, and reflected as other non-segment costs.

Monolith

In December 2015, the Company invested $3.5 million in the preferred stock of Monolith Semiconductor Inc. (“Monolith”), a 
U.S. start-up Company developing silicon carbide technology, which represented approximately 12% of the common stock of 
Monolith on an as-converted basis. The Company accounted for its investment in Monolith under the cost method with any changes 
in value recorded in other comprehensive income. The value of the Monolith investment was $3.5 million at December 31, 2016.

On February 28, 2017, pursuant to a Securities Purchase Agreement between the Company and the stockholders of Monolith 
(“Securities Purchase Agreement”) and conditioned on Monolith achieving a product development milestone and other provisions, 
the Company acquired 62% of the outstanding common stock of Monolith for $15.0 million. The Securities Purchase Agreement 
includes provisions whereby the Company will acquire the remaining outstanding stock of Monolith (“non-controlling interest”) 
at a time or times based on Monolith meeting certain technical and sales targets. During the first quarter of 2018, Monolith met 
the next set of technical and sales targets. As a result, and pursuant to the Securities Purchase Agreement, in April 2018 the Company 
acquired an additional 19% of the outstanding common stock of Monolith for $5.0 million, of which $4.0 million was paid to the 
stockholders of Monolith. On October 5, 2018, the Company acquired the remaining 19% outstanding common stock for $5.0 
million.

The additional investment, in the first quarter of 2017, resulted in the Company gaining control of Monolith and was accounted 
for  as  a  step-acquisition  with  the  fair  value  of  the  original  investment  immediately  before  the  acquisition  estimated  to  be 
approximately $3.5 million. As the fair value of the investment immediately prior to the transaction equaled the carrying value, 
there was no impact on the Company’s Consolidated Statements of Net Income. As the Securities Purchase Agreement includes 
an obligation of the Company to mandatorily redeem the non-controlling interest for cash, the fair value of the non-controlling 
interest was recognized as a liability on the Company’s Consolidated Balance Sheets. The original investment of $3.5 million, 
additional cash consideration of $14.2 million (net of cash acquired), and the non-cash consideration of the fair value of the 
commitment to purchase the non-controlling interest of $9.0 million resulted in a purchase price of $26.7 million. Changes in the 
fair value of the non-controlling interest are recognized in the Company’s Consolidated Statements of Net Income.

Commencing March 1, 2017, Monolith was reflected as a consolidated subsidiary within the Company’s Consolidated Financial 
Statements. Had the acquisition occurred as of January 1, 2017, the impact on the Company’s consolidated results of operations 
would not have been material.

53

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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

(in thousands)

Total purchase consideration:

Original investment

Cash, net of cash acquired

Non-cash, fair value of commitment to purchase non-controlling interest

Total purchase consideration

Allocation of consideration to assets acquired and liabilities assumed:

Current assets, net

Property, plant, and equipment

Patented and unpatented technologies

Non-compete agreement

Goodwill

Current liabilities
Other non-current liabilities

Purchase Price
Allocation

$

$

$

$

3,500

14,172

9,000

26,672

891

789

6,720

140

20,641
(639)
(1,870)
26,672

Included in Monolith’s current assets, net was approximately $0.7 million of receivables. All Monolith goodwill, other assets and 
liabilities were recorded in the Electronics segment and reflected in the United States geographic area. The goodwill resulting 
from this acquisition consists largely of the Company’s expected future product sales and synergies from combining Monolith’s 
products and technology with the Company’s existing electronics product portfolio. Goodwill for the above acquisition is not 
expected to be deductible for tax purposes.

2016 Acquisitions

ON Portfolio

On August  29,  2016,  the  Company  acquired  certain  assets  of  select  businesses  (the  “ON  Portfolio”)  of  ON  Semiconductor 
Corporation for $104.0 million. The Company funded the acquisition with available cash and proceeds from its credit facility. The 
acquired business, which is included in the Electronics segment, consists of a product portfolio that includes transient voltage 
suppression  (“TVS”)  diodes,  switching  thyristors  and  insulated  gate  bipolar  transistors  (“IGBTs”)  for  automotive  ignition 
applications. The  acquisition  expands  the  Company’s  offerings  in  power  semiconductor  applications  as  well  as  increases  its 
presence in the automotive electronics market. The ON Portfolio products have strong synergies with the Company’s existing 
circuit protection business and will strengthen its channel partnerships and customer engagement.

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

(in thousands)
Total purchase consideration:

Cash

Allocation of consideration to assets acquired and liabilities assumed:

Current assets, net
Customer relationships
Patented and unpatented technologies
Non-compete agreement
Goodwill

54

Purchase Price
Allocation

$

$

$

104,000

4,816
31,800
8,800
2,500
56,084
104,000

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

All the ON Portfolio business goodwill and other assets were recorded in the Electronics segment and are reflected in the Americas 
and  Europe  geographic  areas. The  customer  relationships  are  being  amortized  over  13.5  years. The  patented  and  unpatented 
technologies are being amortized over 6-8.5 years. The non-compete agreement is being amortized over 4 years. The goodwill 
resulting from this acquisition consists largely of the Company’s expected future product sales and synergies from combining the 
ON Portfolio products with the Company’s existing power semiconductor product portfolio. $7.3 million of goodwill for the above 
acquisition is expected to be deductible for tax purposes.

As required by purchase accounting rules, the Company recorded a $0.7 million step-up of inventory to its fair value as of the 
acquisition date based on the preliminary valuation. All of the step-up was amortized as a non-cash charge to cost of goods sold 
during 2016, as the acquired inventory was sold, and reflected as other non-segment costs.

Included  in  the  Company’s  Consolidated  Statements  of  Net  Income  for  the  year  ended  December 31,  2016  are  net  sales  of 
approximately $21.8 million since the August 29, 2016 acquisition of the ON Portfolio business.

Menber’s

On April 4, 2016, the Company completed the acquisition of Menber’s S.p.A. (“Menber’s”) headquartered in Legnago, Italy for 
$19.2 million, net of acquired cash and after settlement of a working capital adjustment. The Company funded the acquisition 
with cash on hand and borrowings under the Company’s revolving credit facility. The acquired business is part of the Company's 
commercial vehicle product business within the Automotive segment and specializes in the design, manufacturing, and selling of 
manual and electrical high current switches and trailer connectors for commercial vehicles. The acquisition expands the Company’s 
commercial vehicle products business globally.

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

(in thousands)
Total purchase consideration:

Cash, net of acquired cash

Preliminary allocation of consideration to assets acquired and liabilities assumed:

Current assets, net
Property, plant, and equipment
Customer relationships
Patented and unpatented technologies
Trademarks and tradenames
Goodwill
Current liabilities
Other non-current liabilities

Purchase Price
Allocation

$

$

$

19,162

12,919
1,693
3,050
224
1,849
8,091
(7,220)
(1,444)
19,162

All Menber’s goodwill and other assets and liabilities were recorded in the Automotive segment and reflected in the Europe 
geographic area. The customer relationships are being amortized over 10 years. The patented and unpatented technologies are 
being amortized over 5 years. The trademarks and tradenames are being amortized over 10 years. The goodwill resulting from 
this acquisition consists largely of the Company’s expected future product sales and synergies from combining Menber’s products 
with the Company’s existing automotive product portfolio. Goodwill for the above acquisition is not expected to be deductible 
for tax purposes.

As required by purchase accounting rules, the Company recorded a $0.2 million step-up of inventory to its fair value as of the 
acquisition date based on the preliminary valuation. The step-up was amortized as a non-cash charge to cost of goods sold during 
2016, as the acquired inventory was sold, with the charge reflected as other non-segment costs.

Included  in  the  Company’s  Consolidated  Statements  of  Net  Income  for  the  year  ended  December 31,  2016  are  net  sales  of 
approximately $17.3 million since the April 4, 2016 acquisition of Menber’s.

55

PolySwitch

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

On March 25, 2016, the Company acquired 100% of the circuit protection business (“PolySwitch”) of TE Connectivity Ltd. for 
$348.3 million, net of acquired cash and after settlement of certain post-closing adjustments. The Company funded the acquisition 
with available cash on hand and borrowings under the Company’s revolving credit facility. The PolySwitch business, which is 
split between the Automotive and Electronics segments, has a leading position in polymer based resettable circuit protection 
devices, with a strong global presence in the automotive, battery, industrial, communications and mobile computing markets. 
PolySwitch has manufacturing facilities in Shanghai and Kunshan, China and Tsukuba, Japan. The acquisition allows the Company 
to strengthen its global circuit protection product portfolio, as well as strengthen its presence in the automotive electronics and 
battery protection end markets. The acquisition also significantly increases the Company’s presence in Japan.

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

(in thousands)
Total purchase consideration:
Original consideration
Post closing consideration adjustment received
Acquired cash
Acquired cash to be returned to seller
Total purchase consideration

Allocation of consideration to assets acquired and liabilities assumed:

Current assets, net
Property, plant, and equipment
Land lease
Patented and unpatented technologies
Customer relationships
Goodwill
Other long-term assets
Current liabilities
Other non-current liabilities

Purchase Price
Allocation

$

$

$

$

350,000
(1,708)
(3,810)
3,810
348,292

60,228
51,613
4,290
56,425
39,720
165,088
11,228
(35,280)
(5,020)
348,292

All PolySwitch goodwill and other assets and liabilities were recorded in the Electronics and Automotive segments and reflected 
in all geographic areas. The customer relationships are being amortized over 15 years. The patented and unpatented technologies 
are being amortized over 10 years. The goodwill resulting from this acquisition consists largely of the Company’s expected future 
product sales and synergies from combining PolySwitch products with the Company’s existing automotive and electronics product 
portfolio. $103.8 million and $61.3 million of the goodwill for the above acquisition has been assigned to the Electronics and 
Automotive segments, respectively, with $64.9 million expected to be deductible for tax purposes.

As required by purchase accounting rules, the Company recorded a $6.9 million step-up of inventory to its fair value as of the 
acquisition date based on the preliminary valuation. The step-up was amortized as a non-cash charge to cost of goods sold during 
the second quarter of 2016, as the acquired inventory was sold, and reflected as other non-segment costs.

Included  in  the  Company’s  Consolidated  Statements  of  Net  Income  for  the  year  ended  December 31,  2016  are  net  sales  of 
approximately $126.5 million since the March 25, 2016 acquisition of PolySwitch.

2016 Dispositions

During the first quarter of 2016, the Company sold its tangible and intangible assets relating to a marine product line that it acquired 
as part of its acquisition of Selco A/S in 2011. In connection with this sale, the Company recorded a loss on sale of the product 
line of $1.4 million reflected within selling, general, and administrative expenses for the year ended December 31, 2016. This loss 
was recognized as an “other” charge for segment reporting purposes.

56

Pro Forma Results

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following table summarizes, on an unaudited pro forma basis, the combined results of operations of the Company and IXYS 
as though the acquisition had occurred as of January 1, 2017. The Company has not included pro forma results of operations for 
U.S. Sensor or Monolith as these results were not material to the Company. The pro forma amounts presented are not necessarily 
indicative of either the actual consolidated results had the IXYS acquisition occurred as of January 1, 2017 or of future consolidated 
operating results.

(in thousands, except per share amounts)

Net sales

Income before income taxes

Net income

Net income per share — basic

Net income per share — diluted

Pro forma results presented above primarily reflect the following adjustments:

(in thousands)

Amortization(a)

Depreciation

Transaction costs(b)

Amortization of inventory step-up(c)

Stock compensation(d)

Interest expense(e)

Income tax impact of above items

For the Fiscal Year Ended

December 29,
2018

December 30,
2017

$

1,735,181

$

272,724

215,228

8.61

8.53

1,564,956

142,150

75,604

3.05

3.00

For the Fiscal Year Ended

December 29,
2018

December 30,
2017

$

12,009

$

—

9,976

36,927

5,845

—
(15,446)

(25,203)
556
(9,976)
(36,927)
(6,635)
(10,326)
29,336

(a) The  amortization  adjustment  for  the  twelve  months  ended  December 29,  2018  primarily  reflects  the  reduction  of
amortization expense in the period related to the Order backlog intangible asset. The Order backlog has a useful life of
twelve months and will be fully amortized in the fiscal 2017 pro forma results. The amortization adjustment for the twelve
months ended December 30, 2017 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 twelve months ended

December 29, 2018 and recognition of those fees during the twelve months ended December 30, 2017.

(c) The amortization of inventory step-up adjustment reflects the reversal of the amount recognized during the twelve months
ended December 29, 2018 and the recognition of the full amortization during the twelve months ended December 30,
2017. The inventory step-up was amortized over five months as the inventory was sold.

(d) The stock compensation adjustment reflects the reversal of the portion of stock compensation for IXYS stock options
that were converted to Littelfuse stock options and expensed immediately during the twelve months ended December 29,
2018. The adjustment for the twelve months ended December 30, 2017 reflect the incremental stock compensation for
the converted stock options.

(e) The interest expense adjustment reflects incremental interest expense related to the financing of the transaction.

The following table summarizes, on an unaudited pro forma basis, the combined results of operations of the Company and the 
acquired PolySwitch and the ON Portfolio businesses as though the acquisitions had occurred as of December 28, 2014. The 
Company has not included pro forma results of operations for Menber’s as these results were not material to the Company. The 
pro forma amounts presented are not necessarily indicative of either the actual consolidated results had the PolySwitch or ON 
Portfolio acquisitions occurred as of December 28, 2014 or of future consolidated operating results.

57

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except per share amounts)
Net sales
Income before income taxes
Net income
Net income per share — basic
Net income per share — diluted

For the Fiscal Year Ended
December 31, 2016

$

1,130,645
143,110
124,388
5.51
5.47

Pro forma results presented above primarily reflect: (i) incremental depreciation relating to fair value adjustments to property, 
plant, and equipment; (ii) amortization adjustments relating to fair value estimates of intangible assets; (iii) incremental interest 
expense on assumed indebtedness; and (iv) additional cost of goods sold relating to the capitalization of gross profit as part of 
purchase accounting recognized for purposes of the pro forma as if it was recognized during the Company’s first quarter of 2015. 
Pro forma adjustments described above have been tax affected using the Company's effective rate during the respective periods.
The historical PolySwitch and ON Portfolio business results for the year ended December 31, 2016 does not include a provision 
for income taxes. Income tax expense for the historical ON Portfolio business was not provided on a standalone basis.

3. Inventories

The components of inventories at December 29, 2018 and December 30, 2017 are as follows:

(in thousands)
Raw materials
Work in process
Finished goods
Total

2018

2017

$

$

69,883
88,505
99,840
258,228

$

$

39,030
27,454
74,305
140,789

4. Property, Plant, and Equipment

The components of net property, plant, and equipment at December 29, 2018 and December 30, 2017 are as follows:

(in thousands)
Land
Building
Equipment
Accumulated depreciation and amortization

Total

2018

2017

$

$

25,630
114,636
583,043
(383,415)
339,894

$

$

9,547
86,599
505,838
(351,407)
250,577

The Company recorded depreciation expense of $51.0 million, $38.3 million, and $33.8 million for the fiscal years ended 
December 29, 2018, December 30, 2017, and December 31, 2016, respectively.

58

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

5. Goodwill and Other Intangible Assets

The amounts for goodwill and changes in the carrying value by segment are as follows:

(in thousands)
As of December 31, 2016

Additions(a)
Foreign currency translation and other adjustments(b)

As of December 30, 2017

Additions(c)
Foreign currency translation adjustments

As of December 29, 2018

Electronics

$

$

$

215,765
36,716
26,478
278,959
382,903
(5,823)
656,039

Automotive
144,585
$
—
(8,756)
135,829
—
(3,497)
132,332

$

$

Industrial

Total

$

$

$

43,194
—
(4,568)
38,626
—
(282)
38,344

$

$

$

403,544
36,716
13,154
453,414
382,903
(9,602)
826,715

(a) The 2017 additions resulted from the acquisitions of U.S. Sensor and Monolith.

(b) Adjustments in 2017 reflect adjustments to reclass goodwill by segment as well as the impact of changes in foreign
exchange rates. The impact of the reclassification was an increase in goodwill to the Electronics segment of $21.6 million
and a decrease of goodwill of $16.8 million and $4.8 million to the Automotive segment and the Industrial segment,
respectively.

(c) The 2018 additions resulted primarily from the acquisition of IXYS.

The components of other intangible assets at December 29, 2018 and December 30, 2017 are as follows:

(in thousands, except weighted average useful life)
Patents, licenses and software
Distribution network
Customer relationships, trademarks,tradenames, and other

Total

(in thousands, except weighted average useful life)
Patents, licenses and software
Distribution network
Customer relationships, trademarks, and tradenames

Total

Weighted 
Average
Useful Life 
(Years)
11.4
12.6
17.5

Weighted 
Average
Useful Life 
(Years)
11.4
12.1
15.6

As of December 29, 2018

Gross
Carrying
Value

139,413
43,876
374,246
557,535

Accumulated
Amortization
69,431
$
34,564
92,066
196,061

$

As of December 30, 2017

Gross
Carrying
Value

141,520
46,233
162,679
350,432

Accumulated
Amortization
59,609
$
33,361
53,612
146,582

$

$

$

$

$

Net Book
Value

69,982
9,312
282,180
361,474

Net Book
Value

81,911
12,872
109,067
203,850

$

$

$

$

During the years ended December 29, 2018 and December 30, 2017, the Company recorded additions to other intangible assets 
of $212.7 million and $11.0 million, respectively, for acquisitions during those years, the components of which were as follows:

59

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands, except weighted average useful life)
Patents, licenses and software
Customer relationships, trademarks, and tradenames
Order backlog
Total

2018

2017

Weighted
Average
Useful Life 
(Years)
8.0
17.2
1.0

Amount

51,500
148,800
12,420
212,720

$

$

Weighted
Average
Useful Life 
(Years)
9.6
9.0
0.0

Amount

7,810
3,220
—
11,030

$

$

For intangible assets with definite lives, the Company recorded amortization expense of $52.2 million, $24.7 million, and $19.3 
million in 2018, 2017, and 2016, respectively.

Estimated annual amortization expense related to intangible assets with definite lives at December 29, 2018 is as follows:

(in thousands)
2019
2020
2021
2022
2023
2024 and thereafter

Total

6. Accrued Liabilities

Amount

39,440
39,162
37,164
36,368
31,906
177,434
361,474

$

$

The components of accrued liabilities at December 29, 2018 and December 30, 2017 are as follows:

(in thousands)
Employee-related liabilities
Other non-income taxes
Professional services
Interest
Accrued share repurchases
Restructuring liability
Other

Total

2018

2017

60,640
21,523
6,169
5,137
4,349
3,887
36,700
138,405

$

$

51,239
15,207
2,214
2,477
—
1,459
27,819
100,415

$

$

Employee-related liabilities consist primarily of payroll, sales commission, 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.

7. Lease Commitments

The  Company  leases  certain  office  and  warehouse  space  as  well  as  certain  machinery  and  equipment  under  non-cancellable 
operating leases. Rent expense under these leases was $9.6 million, $11.6 million, and $12.6 million in 2018, 2017, and 2016, 
respectively.

Rent expense is recognized on a straight-line basis over the term of the leases. The difference between straight-line basis rent and 
the amount paid has been recorded as accrued lease obligations. The Company also has leases that have lease renewal provisions. 

60

As of December 29, 2018, all operating leases outstanding were with third parties. The Company did not have any capital leases 
as of December 29, 2018.

Future minimum payments for all non-cancellable operating leases with initial terms of one year or more at December 29, 2018
are as follows:

(in thousands)
2019
2020
2021
2022
2023
2024 and thereafter

Total

Future
Minimum
Payments

9,133
7,590
5,574
4,590
2,946
2,774
32,607

$

$

8. Restructuring, Impairment and Other Charges

The Company recorded restructuring, impairment and other charges-net for fiscal years 2018, 2017, and 2016 as follows:

(in thousands)
Employee terminations
Other restructuring charges
   Total restructuring charges
Impairment
   Total

(in thousands)
Employee terminations
Other restructuring charges
   Total restructuring charges
Impairment
   Total

(in thousands)
Employee terminations
Other restructuring charges
   Total restructuring charges
Impairment
   Total

Fiscal Year Ended December 29, 2018

Electronics
8,742
$
670
9,412
—
9,412

$

Automotive
634
$
192
826
88
914

$

Industrial
127
$
—
127
2,130
2,257

$

$

$

Total

9,503
862
10,365
2,218
12,583

Fiscal Year Ended December 30, 2017

Electronics
1,244
$
234
1,478
—
1,478

$

Automotive
371
$
—
371
—
371

$

Industrial
378
$
—
378
—
378

$

$

$

Total

1,993
234
2,227
—
2,227

Fiscal Year Ended December 31, 2016

Electronics
135
$
1,609
1,744
—
1,744

$

Automotive
299
$
75
374
—
374

$

Industrial
1,094
$
783
1,877
14,809
16,686

$

$

$

Total

1,528
2,467
3,995
14,809
18,804

2018
For the year ended December 29, 2018, the Company recorded total restructuring charges of $10.4 million for employee 
termination costs and other restructuring charges related to lease termination and facility closure. These charges primarily 
related to the integration of IXYS and the reorganization of the IXYS Radio Pulse business within the Electronics segment and 
the reorganization of operations in the Commercial Vehicle Products business within the Automotive segment.

61

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

For the year ended December 29, 2018, the Company recorded impairment charges of $2.2 million primarily related to the 
impairment of a building and a trade name associated with the exit of the Custom business within the Industrial segment.

2017
For the year ended December 30, 2017, the Company recorded total restructuring charges of $2.2 million for employee 
termination costs and other restructuring charges. The Company recorded $2.0 million for employee termination costs primarily 
related to the reorganization of selling, general, and administrative functions within the Electronics segments as well as the 
reorganization of certain operations.

2016
For the year ended December 31, 2016, the Company recorded total restructuring charges of $4.0 million for employee 
termination costs and other restructuring charges, of which $1.6 million related to a manufacturing product line relocation 
within the Electronics segment. The Company recorded $1.5 million for employee termination costs primarily related to the 
reorganization of certain operations in the Industrial and Automotive segments.

Additionally, the Company recognized a charge for goodwill impairment of $8.8 million for its Custom Products reporting unit
within the Industrial segment, and non-cash impairment charges of $6.0 million, of which $3.8 million related to the 
impairment of the Custom Products tradename and $2.2 million related to the impairment of certain customer relationship 
intangible assets in the Custom Products reporting unit within the Industrial segment.

The restructuring reserves as of December 29, 2018 and December 30, 2017 are $3.9 million and $1.5 million, respectively. 
The restructuring reserves are included within accrued liabilities. Payments associated with employee terminations reflected in 
the above table were substantially completed by December 29, 2018. The Company anticipates the remaining payments 
associated with employee terminations will be completed in the first quarter of fiscal 2019.

9. Debt

The carrying amounts of debt at December 29, 2018 and December 30, 2017 are as follows:

(in thousands)
Term Loan
Euro Senior Notes, Series A due 2023
Euro Senior Notes, Series B due 2028
U.S. Senior Notes, Series A due 2022
U.S. Senior Notes, Series B due 2027
U.S. Senior Notes, Series A due 2025
U.S. Senior Notes, Series B due 2030
Other
Unamortized debt issuance costs

Total debt

Less: Current maturities
Total long-term debt

Revolving Credit Facility / Term Loan

2018

2017

$

$

155,000
133,417
108,330
25,000
100,000
50,000
125,000
2,619
(4,636)
694,730
(10,000)
684,730

$

$

122,500
139,623
113,369
25,000
100,000
—
—
—
(4,881)
495,611
(6,250)
489,361

On March 4, 2016, the Company entered into a five-year credit agreement (“Credit Agreement”) with a group of lenders for up 
to $700.0 million. The Credit Agreement consisted of an unsecured revolving credit facility (“Revolving Credit Facility”) of $575.0 
million and an unsecured term loan credit facility (“Term Loan”) of up to $125.0 million. In addition, the Company had the ability, 
from time to time, to increase the size of the Revolving Credit Facility and the Term Loan by up to an additional $150.0 million, 
in  the  aggregate,  in  each  case  in  minimum  increments  of  $25.0  million,  subject  to  certain  conditions  and  the  agreement  of 
participating lenders.

On October 13, 2017, the Company amended the Credit Agreement to increase the Revolving Credit Facility from $575.0 million
to $700.0 million and increase the Term Loan from $125.0 million to $200.0 million and to extend the expiration date from March 

62

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

4, 2021 to October 13, 2022. The Credit Agreement also includes the option for the Company to increase the size of the Revolving 
Credit Facility and the Term Loan by up to an additional $300.0 million, in the aggregate, subject to the satisfaction of certain 
conditions set forth in the Credit Agreement. Term Loans may be made in up to two advances. The first advance of $125.0 million
occurred on October 13, 2017 and the second advance of $75.0 million occurred on January 16, 2018. For the Term Loan, the 
Company is required to make quarterly principal payments of 1.25% of the original term loan ($2.5 million with the second advance 
on January 16, 2018) through maturity, with the remaining balance due on October 13, 2022. In addition to the quarterly principal 
payments, the Company paid $35.0 million of principal on the term loan during the fiscal year ended December 29, 2018.

Outstanding borrowings under the Credit Agreement bear interest, at the Company’s option, at either LIBOR(fixed for interest 
periods of one, two, three or six-month periods) plus 1.00% to 2.00%, or at the bank’s Base Rate, as defined, plus 0.00% to 1.00%, 
based upon the Company’s Consolidated Leverage Ratio, as defined. The Company is also required to pay commitment fees on 
unused portions of the credit agreement ranging from 0.15% to 0.25%, based on the Consolidated Leverage Ratio, as defined in 
the agreement. The credit agreement includes 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 3.59% at December 29, 
2018.

As of December 29, 2018, the Company had $0.1 million outstanding in letters of credit and had available $699.9 million of 
borrowing capacity under the Revolving Credit Facility. At December 29, 2018, 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 2022 and 2027, 
the “Senior Notes”) were funded. Interest on the U.S. Senior Notes due 2025 and 2030 will be payable 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 December 29, 2018, 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.

63

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Interest  paid on all Company debt was approximately $18.5 million, $13.4 million, and $8.6 million in fiscal year ended 2018, 
2017, and 2016, respectively.

Debt Issuance Costs

The Company paid debt issuance costs of $0.9 million in relation to the $175 million Note Purchase Agreement that was entered 
on November 15, 2017. The Company incurred debt issuance costs of $1.6 million in relation to the 2017 amendment to the Credit 
Agreement which, along with the remaining balance of debt issuance costs of the previous credit facility, are being amortized over 
the life of the Credit Agreement. The Company incurred aggregate debt issuance costs of $1.8 million in relation to the Senior 
Notes issued previously which are being amortized over the respective lives of the Series A and B notes.

Debt Maturities

Scheduled maturities of the Company’s long-term debt for each of the five years succeeding December 29, 2018 and thereafter 
are summarized as follows:

(in thousands)
2019
2020
2021
2022
2023
2024 and thereafter

Scheduled
Maturities

10,000
10,000
10,000
152,619
133,417
383,330
699,366

$

$

10. 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.

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. Such securities are further detailed in Note 1, Summary of Significant Accounting Policies and 
Other Information.

Defined Benefit Plan Assets / Non-qualified Supplemental Retirement and Savings Plan Investments

See Note 11, Benefit Plans, for description of valuation methodologies and investment balances for defined benefit plan assets 
and investments related to the Company’s Non-Qualified Supplemental Retirement and Savings Plan.

64

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

There were no changes during 2018 to the Company’s valuation techniques used to measure asset and liability fair values on a 
recurring basis. As of December 29, 2018 and December 30, 2017, the Company held no 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 December 29, 
2018:

(in thousands)

Fair Value Measurements Using

Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Significant
Other
Observable
Inputs
(Level 2)

Significant
Unobservable
Inputs
(Level 3)

Total

Investments in equity securities

$

Mutual funds

10,312

$

9,112

— $

—

— $

—

10,312

9,112

The following table presents assets measured at fair value by classification within the fair value hierarchy as of December 30, 
2017:

(in thousands)
Investments in equity securities
Mutual funds

Fair Value Measurements Using

Quoted Prices in
Active Markets for
Identical Assets
(Level 1)

Significant
Other
Observable
Inputs
(Level 2)

Significant
Unobservable
Inputs
(Level 3)

Total

$

$

10,993
7,962

— $
—

— $
—

10,993
7,962

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, trade 
receivables and its long-term debt. Due to their short-term maturity, the carrying amounts of cash and cash equivalents, short-term 
investments and trade receivables approximate their fair values. The Company’s revolving and term loan debt facilities’ fair values 
approximate book value at December 29, 2018 and December 30, 2017, 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 December 29, 2018 and December 30, 2017 were as follows:

(in thousands)
Euro Senior Notes, Series A due 2023
Euro Senior Notes, Series B due 2028
USD Senior Notes, Series A due 2022
USD Senior Notes, Series B due 2027
USD Senior Notes, Series A due 2025
USD Senior Notes, Series B due 2030

December 29, 2018

December 30, 2017

Carrying
Value

Estimated
Fair Value

Carrying
Value

Estimated
Fair Value

$

$

133,417
108,330
25,000
100,000
50,000
125,000

$

130,888
103,774
24,115
94,458
47,434
114,731

$

139,623
113,369
25,000
100,000
—
—

138,294
111,579
24,737
99,992
—
—

65

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The fair value as of the measurement date, net book value as of the end of the year and related impairment charge for assets 
measured at fair value on a nonrecurring basis subsequent to initial recognition during the fiscal years ended December 31, 2016 
were as follows:

(in thousands)
Goodwill
Other intangible assets
Total

Fiscal Year Ended December 31, 2016

Impairment
Charge

Fair Value
Measurement 
(Level 3)

Net Book
Value

$

$

8,794
6,015
14,809

$

$

— $
680
680

$

—
660
660

Further information regarding the impairment charges of goodwill and intangible assets is provided  in Note 8, Restructuring, 
Impairment and Other Charges, of the Notes to Consolidated Financial Statements included in this Annual Report.

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. The following table presents the 
fair value, valuation techniques and related unobservable inputs for these Level 3 measurements for the fiscal year ended December 
31, 2016:

(in thousands, except rates data)
Tradename

Customer relationships

$

$

Fair Value

Valuation 
Technique

680 Relief from royalty

— Excess earnings

Unobservable
Inputs
Discount rate:
Royalty rate:

Discount rate:
Attrition rate:

Rates
18%
1%

18%
5%

66

11. Benefit Plans

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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.

IXYS Acquisition

During 2018, as a result of the IXYS acquisition, pension liabilities were assumed by the Company in Germany, Philippines, and 
U.K.

Benefit plan related information is as follows for the years 2018 and 2017:

(in thousands)
Change in benefit obligation:
Benefit obligation at beginning of year

Service cost
Interest cost
Net actuarial gain
Benefits paid from the trust
Benefits paid directly by the Company
Settlements
Acquisitions
Effect of exchange rate movements
Other

Benefit obligation at end of year

Change in plan assets at fair value:
Fair value of plan assets at beginning of year

Actual return on plan assets
Employer contributions
Benefits paid
Settlements
Acquisitions
Effect of exchange rate movements
Fair value of plan assets at end of year
Net amount recognized/(unfunded status)

2018

2017

$

$

$

$

67,268
2,266
3,104
(7,321)
(2,479)
(1,802)
(1,291)
48,358
(6,918)
1,648
102,833

$

$

$

48,123
(2,847)
2,341
(2,479)
(1,291)
31,954
(5,125)
70,676
(32,157) $

55,606
2,037
1,887
(433)
(1,405)
(1,098)
(31)
—
5,477
5,228
67,268

42,208
2,962
264
(1,405)
—
—
4,094
48,123
(19,145)

Amounts recognized in the Consolidated Balance Sheets as of December 29, 2018 and December 30, 2017 consist of the following:

(in thousands)
Amounts recognized in the Consolidated Balance Sheets consist of:
Noncurrent assets
Current benefit liability
Noncurrent benefit liability
Net liability recognized

2018

2017

$

$

$

811
(1,094)
(31,874)
(32,157) $

78
(481)
(18,742)
(19,145)

67

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The amounts included in accumulated other comprehensive loss in the Consolidated Balance Sheets, excluding tax effects, that 
have not yet been recognized as components of net period cost as of December 29, 2018 and December 30, 2017 were as following: 

(in thousands)
Net actuarial loss
Prior service cost

Total

2018

2017

9,777
1,607
11,384

$

$

12,261
—
12,261

$

$

The estimated net actuarial loss which will be amortized from accumulated other comprehensive income (loss) into benefit cost 
in 2019 is approximately $0.2 million.

The pre-tax amounts recognized in other comprehensive income loss in 2018 as components of net periodic benefit costs were as 
follows:

(in thousands)
Amortization of:

Prior service cost

Amount arising during the period:

Net actuarial loss
Settlement loss
Foreign currency adjustments
Total

The components of pension expense for the fiscal years 2018, 2017, and 2016 are as follows: 

(in thousands)
Components of net periodic benefit cost:

Service cost
Interest cost
Expected return on plan assets
Amortization of prior service
Net periodic benefit cost
Settlement loss / curtailment (gain)
Total expense for the year

2018

2017

$

$

2,266
3,104
(3,222)
291
2,439
238
2,677

$

$

2,037
1,887
(1,990)
337
2,271
(25)
2,246

2018

291

(396)
238
744
877

2016

1,509
1,662
(1,935)
306
1,542
(36)
1,506

$

$

$

$

Weighted average assumptions used to determine net periodic benefit cost for the fiscal years 2018, 2017, and 2016 are as follows:

Discount rate
Expected return on plan assets
Compensation increase rate

2018

2017

2016

2.8%
4.2%
5.0%

3.0%
4.5%
4.5%

3.7%
4.9%
5.3%

The  accumulated  benefit  obligation  for  the  foreign  plans  was  $99.6  million  and  $60.5  million  at  December 29,  2018  and 
December 30, 2017, respectively.

68

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following table provides a summary of under-funded or unfunded pension benefit plans with projected benefit obligations in 
excess of plan assets as of December 29, 2018 and December 30, 2017:

(in thousands)
Projected benefit obligation
Fair value of plan assets

2018

2017

$

$

70,579
37,611

28,515
9,292

The following table provides a summary of under-funded or unfunded pension benefit plans with accumulated benefit obligations 
in excess of plan assets as of December 29, 2018 and December 30, 2017:

(in thousands)
Accumulated benefit obligation
Fair value of plan assets

2018

2017

$

$

66,049
36,003

18,990
6,003

Weighted  average  assumptions  used  to  determine  benefit  obligations  as  of  December 29,  2018,  December 30,  2017  and 
December 31, 2016 are as follows:

Discount rate
Compensation increase rate

2018

2017

2016

3.1%
4.6%

3.1%
5.0%

2.6%
4.5%

Expected benefit payments to be paid to participants for the fiscal year ending are as follows:

(in thousands)
2019
2020
2021
2022
2023
2024-2028

Expected Benefit
Payments

$

4,210
4,243
4,691
4,547
4,884
27,047

The Company expects to make approximately $2.3 million of contributions to the plans in 2019.

Defined Benefit Plan Assets

Based upon analysis of the target asset allocation and historical returns by type of investment, the Company has assumed that the 
expected  long-term  rate  of  return  will  be  4.5%  on  plan  assets. Assets  are  invested  to  maximize  long-term  return  taking  into 
consideration timing of settlement of the retirement liabilities and liquidity needs for benefits payments. Pension plan assets were 
invested as follows, and were not materially different from the target asset allocation:

Equity securities
Debt securities
Cash and cash equivalents, and other

Asset Allocation

2018

2017

30%
66%
4%
100%

35%
64%
1%
100%

The  Company  segregated  its  plan  assets  by  the  following  major  categories  and  level  for  determining  their  fair  value  as  of 
December 29, 2018 and December 30, 2017. All plan assets that are valued using the net asset value per share (“NAV”) practical 
expedient have not been included within the fair value hierarchy but are separately disclosed.

69

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Cash and cash equivalents – Carrying value approximates fair value. As such, these assets were classified as Level 1. The Company 
also invests in certain short-term investments which are valued using the amortized cost method and at NAV.

Equity – The values of individual equity securities were based on quoted prices in active markets. As such, these assets are classified 
as Level 1. Additionally, the Company invests in certain equity funds that are valued at calculated NAV.

Fixed income – Fixed income securities are typically priced based on a last trade basis and are exchange-traded. Accordingly, the 
Company classified fixed income securities as Level 1. The Company also invests in certain fixed income funds which are valued 
at NAV.

Insurance Contracts and other – This category includes insurance contracts that are valued by the re-insurer with the valuation 
inputs being not highly observable and traded on an open market.  Accordingly, insurance contracts was categorized as Level 3.  
Additionally, this category includes other assets and liabilities including futures or swaps valued at NAV. 

For any Level 2 and Level 3 plan assets, management reviews significant investments on a periodic basis including investigation 
of unusual fluctuations in price or returns and obtaining an understanding of the pricing methodology to assess the reliability of 
third-party pricing estimates.

The valuation methodologies described above may generate a fair value calculation that may not be indicative of net realizable 
value or future fair values. While the Company believes the valuation methodologies used are appropriate, the use of different 
methodologies or assumptions in calculating fair value could result in different amounts. The Company invests in various assets 
in which valuation is determined by NAV. The Company believes that the NAV is representative of fair value at the reporting date, 
as there are no significant restrictions on redemption of these investments or other reasons to indicate that the investment would 
be redeemed at an amount different than the NAV.

The following table presents the Company’s pension plan assets measured at fair value by classification within the fair value 
hierarchy as of December 29, 2018:

(in thousands)

Equities

Fixed income

Insurance contracts and other

Cash and cash equivalents

Total pension plan assets

Fair Value Measurements Using
Level 2

Level 3

Level 1

NAV

Total

$

$

1,361

$

— $

— $

19,528

$

3,336

—

702

—

—

—

—

632

—

43,134

1,161

823

20,889

46,470

1,793

1,525

5,399

$

— $

632

$

64,645

$

70,676

The following table presents the Company’s pension plan assets measured at fair value by classification within the fair value 
hierarchy as of December 30, 2017:

(in thousands)

Equities

Fixed income

Cash and cash equivalents

Total pension plan assets

Defined Contribution Plan

Fair Value Measurements Using
Level 2

Level 3

Level 1

NAV

Total

$

$

1,031

$

— $

— $

16,032

$

8,088

173

—

—

—

—

22,568

231

17,063

30,656

404

9,292

$

— $

— $

38,831

$

48,123

The Company also maintains a 401(k) savings plan covering substantially all U.S. employees. The Company matches 100% of 
the employee’s annual contributions for the first 4% of the employee’s eligible compensation. The Company may provide an 
additional discretionary match to participants and made discretionary matches of 2% of the employee’s eligible compensation for 
each of the years ended December 29, 2018, December 30, 2017 and December 31, 2016. Employees are immediately vested in 
their contributions plus actual earnings thereon, as well as the Company contributions. Company matching contributions amounted 
to $4.5 million, $3.5 million, and $3.2 million in 2018, 2017, and 2016, respectively.

70

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Non-qualified Supplemental Retirement and Savings Plan

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 
investments are subject to the claims of the Company’s creditors and the Company is responsible for the payment of all benefits 
under the plan from its general assets. As of December 29, 2018, there was $9.1 million of marketable securities related to the 
plan included in Other assets and $9.1 million of accrued compensation benefits included in Other long-term liabilities. 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. The Company made matching contributions to the plan of $0.4 million in 2018.

12. Stock-Based Compensation

Equity Plans: The Company has equity-based compensation plans authorizing the granting of stock options, restricted shares, 
restricted share units, performance shares and other stock rights to employees and directors. As of December 29, 2018, there were 
1.4 million shares available for issuance of future awards under the Company’s equity-based compensation plans.

Stock options generally vest over a three, four or five-year period and are exercisable over either a seven or ten-year period 
commencing from the date of the grant. Restricted shares and share units granted by the Company generally vest over three to 
four years. Stock options and restricted share units may have accelerated vesting upon meeting certain qualified conditions.

Upon completion of the IXYS acquisition, IXYS outstanding options were assumed by  the Company and converted into options 
of 499,027 shares. The Company recognized approximately $11.9 million of stock compensation expense related to IXYS stock 
options converted to Littelfuse stock options during the fiscal year ended December 29, 2018, of which $4.5 million was recognized 
immediately as it related to prior service periods. See Note 2, Acquisitions and Dispositions, for further discussion.

The following table provides a reconciliation of outstanding stock options for the fiscal year ended December 29, 2018.

Outstanding December 30, 2017

Granted
IXYS converted awards
Exercised
Forfeited

Outstanding December 29, 2018
Exercisable December 29, 2018

Shares Under
Option

Weighted
Average
Price

$

404,301
78,721
499,027
(296,914)
(15,779)
669,356
420,422

110.04
192.59
92.52
87.85
120.59
116.29
100.14

Weighted
Average
Remaining
Contract Life
(Years)

Aggregate
Intrinsic
Value
(000’s)

$

5.4
4.8

36,494
28,542

The  following  table  provides  a  reconciliation  of  non-vested  restricted  share  and  share  unit  awards  for  the  fiscal  year  ended 
December 29, 2018.

Nonvested December 30, 2017

Granted
Vested
Forfeited

Nonvested December 29, 2018

71

Weighted 
Average 
Grant-Date 
Fair Value

Shares

$

199,693
77,430
(104,062)
(12,267)
160,794

130.40
194.39
123.45
144.84
164.61

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The total intrinsic value of options exercised during 2018, 2017, and 2016 was $38.3 million, $2.2 million, and $13.3 million, 
respectively. The total fair value of shares vested was $20.8 million, $15.0 million, and $10.7 million for 2018, 2017, and 2016, 
respectively. The total amount of share-based liabilities paid was $1.1 million, $0.9 million and $0.6 million for 2018, 2017, and 
2016, respectively.

The Company recognizes compensation cost of all share-based awards as an expense on a straight-line basis over the vesting 
period of the awards. At December 29, 2018, the unrecognized compensation cost for options and restricted shares was $22.0 
million before tax, and will be recognized over a weighted average period of 1.8 years. Compensation cost included as a component 
of cost of sales, research and development and selling, general, and administrative expenses for all equity compensation plans 
discussed above was $28.2 million, $17.3 million, and $12.8 million for 2018, 2017, and 2016, respectively. The total income tax 
benefit recognized in the Consolidated Statements of Net Income was $6.0 million, $6.0 million and $4.4 million for 2018, 2017, 
and 2016, respectively.

The Company uses the Black-Scholes option valuation model to determine the fair value of awards granted. The weighted average 
fair value of and related assumptions for options granted are as follows:

Weighted average fair value of options granted
Assumptions:

Risk-free interest rate
Expected dividend yield
Expected stock price volatility
Expected life of options (years)

2018
$45.19

2.79%
0.77%
25.0%
4.4

2017
$30.77

1.79%
0.86%
23.0%
4.4

2016
$26.06

1.37%
0.97%
26.0%
4.6

Expected volatilities are based on the historical volatility of the Company’s stock price. The expected life of options is based on 
historical data for options granted by the Company. The risk-free rates are based on yields available at the time of grant on U.S. 
Treasury bonds with maturities consistent with the expected life assumption.

Preferred Stock: The Board of Directors may authorize the issuance of preferred stock from time to time in one or more series 
with such designations, preferences, qualifications, limitations, restrictions, and optional or other special rights as the Board may 
fix by resolution.

Share Repurchase Program
The Company’s Board of Directors authorized the repurchase of up to 1,000,000 shares of the Company’s common stock under 
a program for the period May 1, 2018 to April 30, 2019. During the fiscal year 2018, the Company repurchased 391,972 shares 
of its common stock.

As of February 18, 2019, the Company has repurchased 79,916 shares of its common stock since the fiscal year ended 
December 29, 2018.

72

13. Other Comprehensive (Loss) Income

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Changes in other comprehensive (loss) income by component for fiscal years 2018, 2017, and 2016 were as follows:

December 29, 2018

Fiscal Year Ended
December 30, 2017

December 31, 2016

(in thousands)

Pre-tax

Tax

Net of
tax

Pre-tax

Tax

Net of
tax

Pre-tax

Tax

Net of
tax

Defined benefit pension
plan adjustments

Unrealized loss on
investments

Foreign currency
translation adjustments

Total change in other
comprehensive (loss)
income

$

924

$ 47

$

877

$

1,532

$ 385

$

1,147

$ (4,563) $ (1,302) $ (3,261)

—

—

—

(974)

(25,338) — (25,338)

10,738

—

—

(974)

(815)

—

(815)

10,738

(24,832)

— (24,832)

$ (24,414) $ 47

$ (24,461) $ 11,296

$ 385

$ 10,911

$ (30,210) $ (1,302) $ (28,908)

Accumulated Other Comprehensive Income (Loss) (“AOCI”): The following table sets forth the changes in the components of 
AOCI by component for fiscal years 2018, 2017, and 2016:

(in thousands)
Balance at January 2, 2016

2016 activity

Balance at December 31, 2016

2017 activity

Balance at December 30, 2017

Cumulative effect adjustment (a)
 2018 activity

Balance at December 29, 2018

Pension and
postretirement
liability and
reclassification
adjustments

Gain (loss)
on
investments
11,584
(815)
10,769
(974)
9,795
(9,795)
—
— $

(8,722) $
(3,261)
(11,983)
1,147
(10,836)
—
877
(9,959) $

Foreign
currency
translation
adjustments
$

Accumulated
other
comprehensive
income (loss)

(48,533) $
(24,832)
(73,365)
10,738
(62,627)
—
(25,338)
(87,965) $

(45,671)
(28,908)
(74,579)
10,911
(63,668)
(9,795)
(24,461)
(97,924)

$

$

(a) The Company adopted ASU 2016-01 on December 31, 2017 on a modified retrospective basis, recognizing the cumulative
effect as a $9.8 million increase to retained earnings. See Note 1, Summary of Significant Accounting Policies and Other
Information, for further discussion.

Amounts reclassified from accumulated other comprehensive (loss) income to earnings for fiscal years 2018, 2017, and 2016 
were as follows:

(in thousands)
Pension and postemployment plans:

Amortization of prior service

Settlement loss/curtailment (gain)

Total

December 29, 2018

Fiscal Year Ended
December 30, 2017

December 31, 2016

$

$

291

238

529

$

$

337
(25)
312

$

$

306
(36)
270

The Company recognizes the amortization of prior service costs and settlement loss and curtailment gain in other income, net 
within the Consolidated Statements of Net Income.

73

14. Income Taxes

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

On December 22, 2017, the U.S. enacted legislation referred to as the "Tax Act". Among other things, the Tax Act reduces the 
U.S. corporate federal income tax rate from 35% to 21%, adds base broadening provisions which limit deductions and address 
excessive international tax planning, imposes a Toll Charge on accumulated earnings of certain non-U.S. subsidiaries and enables 
repatriation of earnings of non-U.S. subsidiaries free of U.S. federal income tax. Other than the Toll Charge (which, except for 
the IXYS impact, was applicable to the Company for 2017), the provisions are generally applicable to the Company in 2018 and 
beyond.

In accordance with the guidance provided in SEC SAB No. 118, in the fourth quarter of 2017 the Company recorded a charge of 
$47.0 million as a provisional reasonable estimate of the impact of the Tax Act, including $49.0 million for the Toll Charge net 
of $2.0 million for other net tax benefits. In the fourth quarter of 2018, within the measurement period outlined in SAB No. 118, 
the Company finalized its estimates of the impact of the Tax Act as of December 30, 2017 and recorded a charge of $3.2 million, 
including $2.3 million for the Toll Charge and $0.9 million for the net impact of other items. In addition, the Company recorded 
$7.0 million for the Toll Charge associated with IXYS as part of the IXYS acquisition purchase price allocation. This was reflected 
in the opening balance sheet as an increase to goodwill and other long-term liabilities.

Although certain administrative guidance has been issued, including final and proposed regulations, the appropriate application 
of many provisions of the Tax Act remain uncertain. The Company used its best judgment as to the application of these provisions 
in determining its final estimates of the impact of the Tax Act as of December 30, 2017, the Toll Charge associated with the IXYS 
acquisition as well as the Company’s income tax expense for the year ended December 29, 2018. Adjustments to income tax 
expense may be necessary in future periods if provisions of the Tax Act, and their interaction with other provisions of the U.S. 
Internal  Revenue  Code,  are  interpreted  differently  than  interpretations  made  by  the  Company,  whether  through  issuance  of 
additional administrative guidance, or through further review of the Tax Act by the Company and its advisors. In this regard, on 
January 15, 2019, final regulations were issued addressing the Toll Charge (replacing the proposed regulations issued in August 
of 2018). The Company is evaluating these final regulations and has yet to determine their impact.

The Company has elected to pay the 2017 Littelfuse Toll Charge and will elect to pay the 2018 IXYS Toll Charge over the eight-
year period prescribed by the Tax Act. The long-term portion of these Toll Charges totaling $28.8 million (which includes the 
Littelfuse and IXYS Toll Charges, partially offset by foreign tax credits, the tax benefit of current year losses and the actual 2018 
and anticipated 2019 annual installment payments) is recorded in Other long-term liabilities on the Consolidated Balance Sheet 
as of December 29, 2018. The anticipated 2019 annual installment payments are included in accrued income taxes.

One of the base broadening provisions of the Tax Act is commonly referred to as the “GILTI” provisions. In accordance with 
guidance issued by the FASB staff, the Company has adopted an accounting policy to treat any GILTI inclusions as a period cost 
if and when incurred. Thus, for the year ended December 29, 2018, deferred taxes were computed without consideration of the 
possible future impact of the GILTI provisions, and any current year impact was recorded as a part of the current portion of income 
tax expense.

Domestic and foreign income (loss) before income taxes is as follows:

(in thousands)
Domestic
Foreign
Income before income taxes

2018

2017

2015

$

$

(49,995) $
254,937
204,942

$

(20,496) $
224,533
204,037

$

(9,563)
132,837
123,274

74

Federal, state and foreign income tax expense (benefit) consists of the following:

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(in thousands)
Current:
Federal
State
Foreign
Subtotal
Deferred:

Federal and State
Foreign
Subtotal
Provision for income taxes

2018

2017

2016

$

$

(3,193) $
119
48,130
45,056

(3,896)
(783)
(4,679)
40,377

$

34,060
450
32,945
67,455

16,562
501
17,063
84,518

$

$

(3,992)
(648)
28,695
24,055

(1,594)
(3,675)
(5,269)
18,786

The current federal tax benefit for 2018 includes the benefit of current year losses (which served to partially offset the amount of 
the IXYS Toll Charge that would otherwise have been payable).

The current federal and state income tax expense for 2017 includes the preliminary estimate of $49 million for the Toll Charge as 
discussed above, partially offset by $13.0 million of foreign tax credits.

The current federal tax benefit for 2016 includes an estimated $3.0 million benefit as a result of the carry-back of the 2016 U.S. 
federal net operating loss to the 2014 tax year.

A reconciliation between income taxes computed on income before income taxes at the federal statutory rate and the provision 
for income taxes is provided below:

(in thousands)
Tax expense at statutory rate of 21% (35% for 2017 and 2016)

2017 Toll Charge (and 2018 adjustment)
Provisional Tax Act impact other than Toll Charge (and 2018 adjustment)
Net impact associated with the GILTI tax provisions
State and local taxes, net of federal tax benefit
Non-U.S. income tax rate differential
Impairment of goodwill without tax benefit
Tax on unremitted earnings
Non-U.S. losses and expenses with no tax benefit
Nondeductible professional fees
Tax deduction for stock of foreign subsidiary
Other, net

Provision for income taxes

$

$

2018

2017

2016

43,038
2,278
966
5,075
(1,238)
(20,472)
—
4,660
3,107
1,001
—
1,962
40,377

$

$

71,413
49,000
(1,962)
—
292
(47,077)
—
12,202
—
1,240
—
(590)
84,518

$

$

43,146
—
—
—
(415)
(25,471)
3,088
2,747
—
313
(3,896)
(726)
18,786

75

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Deferred income taxes are provided for the tax effects of temporary differences between the financial reporting bases and the tax 
bases  of  the  company’s  assets  and  liabilities.  Significant  components  of  the  company’s  deferred  tax  assets  and  liabilities  at 
December 29, 2018 and December 30, 2017, are as follows:

(in thousands)
Deferred tax assets:

Accrued expenses and reserves
Foreign tax credit carryforwards
Other U.S. tax attribute carryforwards
Accrued restructuring
Capital loss carryforwards
Domestic and non-U.S. net operating loss and credit carryforwards
Gross deferred tax assets
Less: Valuation allowance

Total deferred tax assets

Deferred tax liabilities:

Excess of book basis over the tax basis of assets
Tax on unremitted earnings
Total deferred tax liabilities
Net deferred tax liabilities

2018

2017

$

35,597
1,506
1,539
60
47
8,613
47,362
(4,794)
42,568

74,410
12,681
87,091
44,523

$

24,094
1,053
—
156
3,165
5,778
34,246
(6,203)
28,043

21,254
12,000
33,254
5,211

$

$

The deferred tax asset valuation allowance is related to certain net operating loss and credit carryforwards which are not expected 
to be realized. The remaining net operating loss and credit carryforwards either have no expiration date or are expected to be 
utilized prior to expiration (which begin expiring in 2021). The deferred tax asset valuation allowance as of December 30, 2017
also included amounts related to a capital loss carryforward which expired in 2018. No deferred tax asset nor valuation allowance 
has been recorded for certain U.S. and non-U.S. net operating loss carryforwards for which the possibility of usage has been 
determined to be remote.

The Company paid income taxes of $46.2 million, $31.8 million, and $35.6 million in 2018, 2017, and 2016, respectively, and 
received income tax refunds of and $4.3 million and $13.7 million in 2018 and 2017, respectively.

Deferred income taxes are not provided on the excess of the investment value for financial reporting over the tax basis of investments 
in those non-U.S. subsidiaries for which such excess is considered to be permanently reinvested in those operations. The Company 
believes the determination of the amount of such deferred income taxes is impractical as it would depend upon income tax laws 
and circumstances at the time of the hypothetical distributions or dispositions. As of December 29, 2018, unremitted earnings of 
the Company’s non-U.S. subsidiaries was approximately $815 million. A distribution of such earnings will generally not be subject 
to U.S. federal income tax. The Company recognized deferred tax liabilities of $12.7 million ($12.5 million for non-U.S. taxes 
net of related U.S. foreign tax credits, and $0.2 million for U.S. state taxes) as of December 29, 2018 and $12.0 million ($11.8 
million for non-U.S. taxes and $0.2 million for U.S. state taxes) as of December 30, 2017, related to taxes on certain non-U.S. 
earnings which are not considered to be permanently reinvested. Some of these non-U.S. taxes will provide a U.S. federal income 
tax benefit as a foreign tax credit, and the amounts as of December 29, 2018 are net of such benefit (some of which was recorded 
as part of finalizing the provisional reasonable estimate of the impact of the Tax Act). Due to the uncertainty in regard to the Tax 
Act’s provisions, no benefit was recorded for these foreign tax credits as of December 30, 2017.

The Company has three subsidiaries in China which benefit from lowered income tax rates due to “tax holidays” which apply for 
three-year periods, subject to extension. One such tax holiday, which had expired in 2018, was extended in the fourth quarter of 
2018, retroactive to the beginning of the year. Such tax holidays contributed $6.1 million in tax benefits, or $0.24 per diluted share, 
during 2018, with similar amounts expected in future years while such tax holidays are in effect.

76

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

A reconciliation of the beginning and ending amount of unrecognized tax benefits as of December 29, 2018, December 30, 2017, 
and December 31, 2016 is as follows:

(in thousands)
Balance at December 31, 2016

Additions for tax positions taken in the current year
Other

Balance at December 30, 2017

Additions for tax positions taken in the current year
Additions for tax positions related to the pre-acquisition periods of acquired subsidiaries
Decreases due to a lapse in the statute of limitations
Other

Balance at December 29, 2018

$

Unrecognized
Tax Benefits
8,617
$
370
(1,327)
7,660
2,929
9,394
(1,257)
(467)
18,259

$

The company recognizes accrued interest and penalties associated with uncertain tax positions as part of income tax expense. The 
company recognized interest expense of $1.5 million (net of a $0.3 million decrease due to a lapse in the statute of limitations), 
$0.9 million, and $0.9 million in 2018, 2017, and 2016, respectively. Accrued interest included in Other long-term liabilities within 
the Consolidated Balance Sheets was $5.9 million and $3.3 million as of December 29, 2018 and December 30, 2017, respectively.

The amount of unrecognized tax benefits at December 29, 2018 was $18.3 million. This total represents the net amount of tax 
benefits that, if recognized, would favorably affect the effective income tax rate in future periods. Of this amount, approximately 
$3.5 million may be recognized in 2019 based upon the possible lapse in the statute of limitations. None of the positions included 
in unrecognized tax benefits are related to tax positions for which the ultimate deductibility is highly certain, but for which there 
is uncertainty about the timing of such deductibility.

The U.S. federal statute of limitations remains open for the Company for the 2014 tax year and later years, although the Company 
has been audited for the 2014 through 2016 tax years and the audit concluded in 2018 with no significant adjustments. The U.S. 
federal statute of limitations remains open for IXYS pre-acquisition tax periods ending March 31, 2016, March 31, 2017 and
January 17, 2018. Non-U.S. and U.S. state statutes of limitations generally range from three to seven years, although certain 
jurisdictions do not have a statute expiration. Non-U.S. tax examinations occur from time to time, including examinations currently 
in process in Italy, the Philippines and Hong Kong. The company does not expect to recognize a significant amount of additional 
tax expense as a result of concluding these examinations.

77

15. Earnings Per Share

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

(in thousands, except per share amounts)
Numerator:

Net income as reported

2018

2017

2016

$

164,565

$

119,519

$

104,488

Denominator:
Weighted average shares outstanding

Basic
Effect of dilutive securities
Diluted

Earnings Per Share:
Basic earnings per share
Diluted earnings per share

24,870
365
25,235

22,687
244
22,931

22,559
168
22,727

$
$

6.62
6.52

$
$

5.27
5.21

$
$

4.63
4.60

Potential shares of common stock attributable to stock options excluded from the earnings per share calculation because their 
effect would be anti-dilutive were 42,305, 37,443, and 53,448 shares in 2018, 2017, and 2016, respectively.

On January 17, 2018, the Company acquired IXYS through a combination of cash, Littelfuse common stock, and the value of 
converted, or cash settled IXYS equity awards. The Company issued approximately 2.1 million shares of Littelfuse common 
stock and converted IXYS equity awards into approximately 0.5 million Littelfuse equity awards.

16. Segment Information

The Company and its subsidiaries design, manufacture and sell components and modules for circuit protection, power control and 
sensing  throughout  the  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.  Manufacturing, 
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 and power semiconductor products such as
discrete  transient  voltage  suppressor  (“TVS”)  diodes, TVS  diode  arrays,  protection  and  switching  thyristors,  silicon
carbide, 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 and
automotive  electronics,  electric  vehicle  infrastructure,  data  and  telecommunications,  medical  devices,  LED  lighting,
consumer electronics and appliances.

78

•

•

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

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 industries. Passenger car
fuse products include fuses and fuse accessories for internal combustion engine vehicles and 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 for the commercial vehicle industry.
Automotive sensor products include a wide range of automotive and commercial vehicle products designed to monitor
the passenger compartment occupants, safety and environment as well as the vehicle’s powertrain, emissions, speed and
suspension.

Industrial Segment: Consists of power fuses, protection relays and controls and other circuit protection products for
use in various industrial applications such as oil, gas, mining, alternative energy - solar and wind, electric vehicle
infrastructure, construction, HVAC systems, elevator and other industrial equipment.

The Company has provided this segment information for all comparable prior periods. Segment information is summarized as 
follows:

(in thousands)
Net sales

Electronics
Automotive
Industrial
Total net sales

Depreciation and amortization

Electronics
Automotive
Industrial
Other

Total depreciation and amortization

Operating income (loss)

Electronics
Automotive
Industrial
Other(a)

Total operating income
Interest expense
Foreign exchange (gain) loss
Other income, net
Income before income taxes

2018

2017

2016

1,124,296
479,791
114,381
1,718,468

61,779
23,333
5,661
12,420
103,193

241,426
54,982
17,335
(88,694)
225,049
22,569
(863)
(1,599)
204,942

$

$

$

$

$

$

661,928
453,227
106,379
1,221,534

35,215
22,459
5,337
—
63,011

155,880
62,571
10,334
(10,274)
218,511
13,380
2,376
(1,282)
204,037

$

$

$

$

$

$

535,191
415,200
105,768
1,056,159

29,141
18,107
5,889
—
53,137

117,088
59,905
3,615
(49,964)
130,644
8,628
472
(1,730)
123,274

$

$

$

$

$

$

(a) Included in “Other” Operating income (loss) for 2018 is $88.7 million of charges primarily related to the IXYS acquisition,
which include $36.9 million of purchase accounting inventory step-up charges, $18.7 million  in acquisition-related and integration
costs  primarily  related  to  legal,  accounting  and  other  expenses,  $12.4  million  in  backlog  amortization  costs,  $8.3  million  of
employee  termination  costs,  impairment  and  other  restructuring  charges,  and  $4.5  million  in  stock  compensation  expense
recognized immediately upon close for converted IXYS options related to prior service periods and $2.1 million change in control
expense related to IXYS. In addition, there were $5.8 million of employee termination costs, impairment and other restructuring
charges and acquisition-related expenses for other contemplated acquisitions which included $1.1 million of charges associated
with the exit of the Custom business in the second quarter.

Included in “Other” Operating income (loss) for 2017 are costs related to acquisition and integration costs associated with the 
Company’s  completed  and  pending  acquisitions  in  2017  ($8.0  million  in  Cost  of  sales  ("COS")  and  Selling,  general,  and 

79

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

administrative expenses (“SG&A”), and charges related to restructuring and production transfers in the Company’s Asia operations 
($2.2 million in SG&A).

Included in “Other” Operating income (loss) for 2016 are costs related to the impairment of the Custom Products reporting unit 
($14.8 million), acquisition and integration costs associated with the Company’s 2016 acquisitions ($29.2 million in COS and 
SG&A), transfer of the Company’s reed switch manufacturing operations from its Lake Mills, Wisconsin and Suzhou, China 
locations to the Philippines ($1.6 million in COS), impairment and severance costs related to the closure of the Company’s 
manufacturing facility in Denmark ($1.9 million in SG&A), and restructuring costs ($2.5 million in SG&A and Research and 
development expenses).

The Company’s net sales, long-lived assets and additions to long-lived assets by country for the fiscal years ended 2018, 2017, 
and 2016 are as follows:

(in thousands)
Net sales

United States
China
Other countries(a)

Total net sales

Long-lived assets
United States
China
Mexico
Germany
Philippines
Other countries

Total long-lived assets

Additions to long-lived assets

United States
China
Mexico
Germany
Philippines
Other countries

Total additions to long-lived assets

2018

2017

2016

$

$

$

$

$

$

511,544
468,174
738,750
1,718,468

58,691
95,806
70,495
36,548
32,459
45,895
339,894

5,567
29,286
18,723
5,208
7,605
8,364
74,753

$

$

$

$

$

$

383,025
321,111
517,398
1,221,534

23,490
86,866
62,510
1,082
31,129
45,500
250,577

3,518
32,775
19,395
93
2,979
7,165
65,925

$

$

$

$

$

$

356,674
263,701
435,784
1,056,159

23,731
65,345
52,262
1,313
33,345
41,179
217,175

4,694
13,181
15,667
965
5,096
6,625
46,228

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

For the year ended December 29, 2018, approximately 70% of the Company’s net sales were to customers outside the United 
States  (exports  and  foreign  operations),  including  approximately  27%  to  China.  For  the  year  ended  December 30,  2017, 
approximately 69% of the Company's net sales were to customers outside the United States (exports and foreign operations), 
including approximately 26% to China. For the year ended December 31, 2016, approximately 66% of the Company's net sales 
were to customers outside the United States (exports and foreign operations), including approximately 25% to China. Sales to 
Arrow Electronics, Inc., which were included in the Electronics, Automotive, and Industrial segments, were 10.7% and 10.6% of 
consolidated net sales in 2018 and 2017, respectively, but less than 10% for 2016. No other single customer accounted for more 
than 10% of net sales during the last three years.

80

17. Selected Quarterly Financial Data (Unaudited)

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The quarterly periods for 2018 are for the 13-weeks ended December 29, 2018, September 29, 2018, June 30, 2018, and March 
31, 2018, respectively. The quarterly periods for 2017 are for the 13-weeks ended December 30, 2017, September 30, 2017, July 
1, 2017, and April 1, 2017, respectively.

(in thousands, except per share data)

2018

2017

4Q(a)

3Q(b)

2Q(c)

1Q(d)

4Q(e)

3Q(f)

2Q(g)

1Q(h)

$ 402,281

$ 439,191

$ 459,183

$ 417,813

$ 304,849

$ 317,889

$ 313,355

$ 285,441

154,337

179,594

168,987

149,623

126,624

133,651

132,608

113,650

51,628

32,665

76,228

53,546

59,622

42,326

37,571

36,029

50,780
(10,819)

58,609

42,808

60,270

48,638

48,852

38,891

Net sales

Gross profit

Operating income

Net income/(loss)

Net income/(loss) per share

Basic

Diluted

$

$

1.31

1.29

$

$

2.13

2.10

$

$

1.69

1.67

$

$

1.48

1.45

$

$

(0.48) $
(0.48) $

1.88

1.87

$

$

2.13

2.11

$

$

1.71

1.69

In the fourth quarter of 2018, the Company recorded an estimated one-time tax charge of $3.2 million related to the

(a)
finalization of 2017 provisional reasonable estimate in connection with the Tax Act, partially offset by a $1.5 million benefit for
previously unrecognized tax benefits in respect of which the statute of limitation has expired, $3.7 million in backlog
amortization expense from the IXYS acquisition, $3.2 million in acquisition-related and integration costs and $2.4 million in
restructuring, impairment and other costs.

(b)
in backlog amortization expense from the IXYS acquisition and $2.9 million in acquisition-related and integration costs.

In the third quarter of 2018, the Company recorded $5.2 million in restructuring and impairment charges, $3.1 million

In the second quarter of 2018, the Company recorded $19.0 million for purchase accounting inventory adjustments

(c)
associated with the acquisition of IXYS, $4.2 million in restructuring and impairment charges, $3.1 million in backlog
amortization expense from the IXYS acquisition and $2.4 million in acquisition-related and integration costs.

In the first quarter of 2018, the Company recorded $17.9 million for purchase accounting inventory adjustments

(d)
associated with the acquisition of IXYS, $11.7 million in acquisition-related and integration costs, $4.5 million of stock
compensation expense recognized immediately upon close for converted IXYS options related to prior services periods, $2.5
million in backlog amortization expense, $2.1 million expense related to change in control and $0.8 million in restructuring
costs.

In the fourth quarter of 2017, the Company recorded an estimated one-time tax charge of $49.0 million for the

(e)
enactment of the Tax Act for deemed repatriation of unremitted earnings of foreign subsidiaries, $1.4 million in acquisition-
related and integration costs and $0.7 million in restructuring and production costs related to the transfer of Asian operations.

(f)
million in restructuring and production costs related to the transfer of Asian operations.

In the third quarter of 2017, the Company recorded $4.8 million in acquisition-related and integration costs and $1.5

(g)

(h)

In the second quarter of 2017, the Company recorded $0.3 million in acquisition-related and integration costs.

In the first quarter of 2017, the Company recorded $1.5 million in acquisition-related and integration costs.

81

18. Related Party Transactions

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

As a result of the Company’s acquisition of IXYS, the Company has equity ownerships 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. For the year ended December 29, 2018, the Company recorded revenues of $0.7 million 
from sales of products to Powersem for use as components in their products. For the fiscal year ended December 29, 
2018, the Company purchased $4.5 million of products from Powersem. At December 29, 2018, the trade receivable 
balance from Powersem was $0.1 million and the accounts payable balance to Powersem was $0.2 million.

EB Tech Ltd.: The Company owns approximately 20% of the outstanding equity of EB Tech Ltd. (“EB Tech”), a company 
with expertise in radiation technology based in South Korea. For the year ended December 29, 2018, EB Tech rendered 
processing services for the Company totaling $0.5 million. As of December 29, 2018, the Company’s accounts payable 
balance to EB Tech was $0.1 million.

Automated Technology, Inc.: The Company owns approximately 24% of the outstanding common shares of Automated 
Technology, Inc. (“ATEC”), a supplier located in the Philippines that provides assembly and test services. For the year 
ended  December 29,  2018, ATEC  rendered  assembly  and  test  services  to  the  Company  totaling  $9.9  million. As  of 
December 29, 2018, the Company’s accounts payable balance to ATEC was $0.5 million.

ITEM  9.  CHANGES  IN AND  DISAGREEMENTS  WITH ACCOUNTANTS  ON ACCOUNTING AND  FINANCIAL 
DISCLOSURE.

None.

ITEM 9A. CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures

The Company maintains disclosure controls and procedures that are designed to ensure that information required to be disclosed 
in its reports filed under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported within 
the time periods specified in the SEC’s rules and forms and that such information is accumulated and communicated to management, 
including the Company’s Chief Executive Officer and Chief Financial Officer, as appropriate, to allow for timely decisions regarding 
required disclosure. In designing and evaluating the disclosure controls and procedures, the Company recognizes that any controls 
and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control 
objectives, and the Company is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and 
procedures.

As required by SEC Rule 15d-15(b), the Company carried out an evaluation, under the supervision and with the participation of 
its management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation 
of its disclosure controls and procedures pursuant to SEC Rule 13a-15 as of the end of the period covered by this report. Based 
on the foregoing, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure 
controls and procedures were effective as of December 29, 2018.

Management’s Report on Internal Control over Financial Reporting

Section 404 of the Sarbanes-Oxley Act of 2002 requires management to include in this Annual Report on Form 10-K a report on 
management’s assessment of the effectiveness of the Company’s internal control over financial reporting, as well as an attestation 
report from the Company’s independent registered public accounting firm on the effectiveness of the Company’s internal control 
over financial reporting. Management is responsible for establishing and maintaining adequate internal control over financial 
reporting as such term is defined in Exchange Act Rule 13a-15(f) and 15d-15(f). The Company’s internal control system was 
designed  to  provide  reasonable  assurance  to  its  management  and  the  Board  of  Directors  regarding  the  preparation  and  fair 
presentation of published financial statements.

All internal control systems, no matter how well designed, have inherent limitations. Therefore, even those systems determined 
effective  can  provide  only  reasonable  assurance  with  respect  to  financial  statement  preparation  and  presentation. A  material 
82

weakness is a deficiency, or a combination of deficiencies, in the internal control over financial reporting such that there is a 
reasonable possibility that a material misstatement of the annual or interim financial statement will not be prevented or detected 
on a timely basis.

The  Company’s  management,  including  the  its  Principal  Executive  Officer  and  Principal  Financial  Officer,  assessed  the 
effectiveness  of  the  Company’s  internal  control  over  financial  reporting  as  of  December 29,  2018,  based  upon  the  updated 
framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway 
Commission (“COSO”) in 1992 and updated in May 2013. Based on this assessment, the Company’s management concluded that, 
as of December 29, 2018, the Company’s internal control over financial reporting was effective.

Changes in Internal Control over Financial Reporting

There has been no change in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) 
under the Exchange Act) that occurred during the 12 months or fiscal quarter ended December 29, 2018, that has materially affected, 
or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

ITEM 9B. OTHER INFORMATION.

None.

83

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE.

Except as set forth below, the information required by this item will be contained in the Company’s Proxy Statement related to 
our 2019 Annual Meeting of Stockholders (the "proxy statement") and is incorporated herein by reference.

Information concerning directors and nominees for director is set forth in the section titled “Proposal No. 1 Election of Directors” 
in the Company’s proxy statement and is incorporated herein by reference.

Information concerning the Company’s Audit Committee and Audit Committee financial expert is set forth in the section titled 
“Director Independence; Financial Experts” in the Company's proxy statement and is incorporated herein by reference.

Information concerning the procedures by which security holders may recommend nominees to the Company’s Board of Directors 
is set forth in the section titled “Director Nomination” in the Company’s proxy statement and is incorporated herein by reference.

Information concerning compliance with Section 16 of the Securities Exchange Act of 1934 is set forth in the section titled “Section 
16(a) Beneficial Ownership Reporting Compliance” in the Company’s proxy statement and is incorporated herein by reference.

Executive Officers of the Registrant.

The executive officers of the Company are as follows:

Name
David W. Heinzmann

Meenal A. Sethna

Ryan K. Stafford

Matthew J. Cole

Alexander Conrad

Ian Highley

Deepak Nayar

Michael P. Rutz

Age
55

Position
President and Chief Executive Officer

49

51

47

53

55

59

47

Executive Vice President and Chief Financial Officer

Executive Vice President, Chief Legal and Human Resources Officer and Corporate 
Secretary

Senior Vice President, Business Development and Strategy

Senior Vice President, Passenger Vehicle Business

Senior  Vice President  and  General  Manager,  Semiconductor  Products  and  Chief 
Technology Officer

Senior Vice President and General Manager, Electronics and Industrial Business

Senior Vice President and General Manager, Semiconductor Products

David W. Heinzmann, President and Chief Executive Officer and a member of the Board of Directors. Mr. Heinzmann began 
his career at Littelfuse in 1985 as a manufacturing engineer and has held positions of increasing responsibility since that time, 
including Vice President, Global Operations, from 2007 to 2014, and Chief Operating Officer from 2014 until assuming his current 
position in 2017. 

Meenal A. Sethna, Executive Vice President and Chief Financial Officer. Ms. Sethna joined Littelfuse in 2015 as Senior Vice 
President of Finance until assuming her current position in 2016. Prior to joining Littelfuse, Ms. Sethna served from 2011 to 2015 
as  Vice  President  and  Corporate  Controller  of  Illinois  Tool  Works  Inc.,  a  diversified  manufacturer  of  specialized  industrial 
equipment, consumables, and related service businesses. Ms. Sethna is a Certified Public Accountant in Illinois.

Ryan K. Stafford, Executive Vice President, Chief Legal and Human Resources Officer and Corporate Secretary. Mr. Stafford 
joined Littelfuse as its first General Counsel in 2007 and became Corporate Secretary in 2017. Prior to joining Littelfuse, Mr. 
Stafford served in a number of roles at Tyco International Ltd., including Vice President of China Operations and Vice President 
& General Counsel for its Engineered Products & Services Business Segment.

Matthew J. Cole, Senior Vice President, Business Development and Strategy. Mr. Cole joined Littelfuse in 2015 as Senior Vice 
President and General Manager, Industrial Business Unit, and held that position until assuming his current position in February 
2019. Prior to joining Littelfuse, Mr. Cole served from 2009 to 2015 as Vice President and General Manager of the Advanced 
Measurement Technology division of AMETEK, a global leader in electronic instruments and electromechanical devices.

84

Alexander Conrad, Senior Vice President and General Manager, Passenger Vehicle Business. Mr. Conrad joined Littelfuse in 
2005 as Sales Manager, Germany & Eastern Europe. He then held various positions of increasing responsibility at Littelfuse 
including Sales Director EMEA; Global Director of Sales; Managing Director, Passenger Car Products from 2013 to 2014; and 
Vice President, Passenger Car Products, from 2015 until assuming his current position in July 2018. 

Ian Highley, Senior Vice President and General Manager, Semiconductor Products and Chief Technology Officer. He joined 
Littelfuse  in  2002  as  Product  Line  Director,  Semiconductor  Products.  Mr.  Highley  then  held  various  positions  of  increasing 
responsibility at Littelfuse including General Manager, Semiconductor Products, and from 2012 until assuming his current position 
in 2015, Vice President and General Manager, Semiconductor Products.

Deepak Nayar, Senior Vice President and General Manager, Electronics and Industrial Business. Mr. Nayar joined Littelfuse in 
2005 as Business Line Director of the Electronics Business Unit. He then held various positions of increasing responsibility at 
Littelfuse including Vice President, Global Sales, Electronics Business Unit, and from 2011 until assuming his current position 
in February 2019, Senior Vice President, Electronics Business Unit.

Michael P. Rutz, Senior Vice President and General Manager, Semiconductor Products.  He shares this role with Mr. Highley. 
Mr. Rutz joined Littelfuse in 2014 as Vice President of Supply Chain and Operational Excellence. Mr. Rutz then served as Senior 
Vice President of Global Operations from 2015 until assuming his current position in February 2019. Prior to joining Littelfuse, 
Mr. Rutz served from 2011 to 2014 as Senior Vice President Global Supply Chain at WMS Industries Inc., a Chicago-based 
manufacturer of equipment and software for the gaming industry. 

Code of Ethics

The company has adopted a Code of Conduct (Code of Ethics) that applies to all of the Company’s employees including the 
Company’s Principal Executive Officer, Principal Financial Officer, Principal Accounting Officer and persons performing similar 
functions. It has posted the text of the Code of Conduct on its website at http://investor.littelfuse.com/governance.cfm and intends 
to disclose on such website any amendments to, or waivers from the Code of Conduct. The company’s website is not incorporated 
by reference into this Annual Report.

ITEM 11. EXECUTIVE COMPENSATION.

Information concerning compensation of the Company’s executive officers and directors for the fiscal year ended December 29, 
2018,  is  set  forth  in  the  sections  titled  “Compensation  Discussion  &  Analysis,”  “Compensation  Tables”  and  “Director 
Compensation” in the Company’s proxy statement and is incorporated herein by reference, except the section titled “Compensation 
Committee Report” is hereby “furnished” and not “filed” with this Annual Report on Form 10-K.

Information concerning compensation committee interlocks is set forth in the section titled “Compensation Committee Interlocks 
and Insider Participation” in the Company’s proxy statement and is incorporated herein by reference.

85

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED 
STOCKHOLDER MATTERS.

Information concerning the security ownership of certain beneficial owners, the Company’s directors and executive officers as of 
March1, 2019, is set forth in the section titled “Ownership of Littelfuse, Inc. Common Stock” in the Company’s proxy statement 
and is incorporated herein by reference.

Information  concerning  the  Company’s  equity  compensation  plans  are  set  forth  in  the  section  titled  “Compensation  Plan 
Information” in the Company’s proxy statement and is incorporated herein by reference.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE.

Information concerning the independence of the Company’s directors, certain relationships and related transactions during 2018
and the Company’s policies with respect to such transactions is set forth in the sections titled "Director Independence; Financial 
Experts",  “Related  Person  Transaction  Policy”  and  “Related  Party  Transactions”  in  the  Company’s  proxy  statement  and  is 
incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES.

Information concerning principal accountant fees and services is set forth in the section titled “Audit Related Matters” in the 
Company’s proxy statement and is incorporated herein by reference.

86

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES.

(a)

Financial Statements and Schedules

1. The following Financial Statements are filed as a part of this report:

i.

ii.

iii.

vi.

v.

vi.

Reports of Independent Registered Public Accounting Firms

Consolidated Balance Sheets as of December 29, 2018 and December 30, 2017

Consolidated Statements of Net Income for the fiscal years ended December 29, 2018,
December 30, 2017 and December 31, 2016

Consolidated Statements of Comprehensive Income for the fiscal years ended December 29,
2018, December 30, 2017 and December 31, 2016

Consolidated Statements of Cash Flows for the fiscal years ended December 29, 2018,
December 30, 2017 and December 31, 2016

Consolidated Statements of Equity for the fiscal years ended December 29, 2018,
December 30, 2017 and December 31, 2016

vii. Notes to Consolidated Financial Statements

2. The following Financial Statement Schedule is submitted herewith for the periods indicated therein.

i.

Schedule II - Valuation and Qualifying Accounts and Reserves

Page

36 - 37

38

39

40

41

42

43 - 82

88

All other schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange 
Commission are not required under the related instructions or are inapplicable and, therefore, have been omitted.

3. Exhibits. See Exhibit Index

Item 16. FORM 10-K SUMMARY

None.

90 

87

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

Description

(in thousands)
Fiscal year ended December 29, 2018

Allowance for losses on accounts receivable
Reserves for sales discounts and allowances

Fiscal year ended December 30, 2017

Allowance for losses on accounts receivable
Reserves for sales discounts and allowances

Fiscal year ended December 31, 2016

Allowance for losses on accounts receivable
Reserves for sales discounts and allowances

Balance at
Beginning
of Year

Charged to
Costs and
Expenses 
(a)

Deductions 
(b)

Other (c)

Balance at
End
of Year

$
$

$
$

$
$

1,172
26,344

2,079
23,825

319
17,168

$
$

$
$

$
$

319
124,638

(557) $
$
$ (118,438) $

128
2,432

3,068
106,781

(4,070) $
$
$ (104,941) $

95
679

1,769
91,632

$
$

(42) $
(90,837) $

33
5,862

$
$

$
$

$
$

1,062
34,976

1,172
26,344

2,079
23,825

(a)
Includes provision for doubtful accounts, sales returns and sales discounts granted to customers.
(b) Represents uncollectible accounts written off, net of recoveries and credits issued to customers.
(c) Represents business acquisitions and foreign currency translation adjustments.

88

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this 
report to be signed on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Littelfuse, Inc.

By:  /s/ David W. Heinzmann

David W. Heinzmann,
President and Chief Executive Officer  

Date: February 22, 2019

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons 
on behalf of the registrant on February 22, 2019 and in the capacities indicated.

/s/ Gordon Hunter

Gordon Hunter

/s/ David W. Heinzmann

David W. Heinzmann

/s/ Kristina A. Cerniglia

Kristina A. Cerniglia

/s/ Tzau-Jin Chung

Tzau-Jin Chung

/s/ Cary T. Fu

Cary T. Fu

/s/ Anthony Grillo

Anthony Grillo

/s/ John E. Major

John E. Major

/s/ William P. Noglows

William P. Noglows

/s/ Ronald L. Schubel

Ronald L. Schubel

/s/ Nathan Zommer

Nathan Zommer

/s/ Meenal A. Sethna

Meenal A. Sethna

/s/ Jeffrey G. Gorski

Jeffrey G. Gorski

Chairman of the Board of Directors

Director, President and Chief Executive Officer
(Principal Executive Officer)

Director

Director

Director

Director

Director

Director

Director

Director

Executive Vice President and Chief Financial Officer
(Principal Financial Officer)

Corporate Controller and Chief Accounting Officer
(Principal Accounting Officer)

89

The following documents listed below that have been previously filed with the SEC (1934 Act File No. 0-20388) are incorporated 
herein by reference:

EXHIBIT INDEX

  Description
Stock Purchase Agreement, dated as of April 15, 2013, 
by and among Littelfuse, Inc. and Key Safety Systems, 
Inc.

Stock and Asset Purchase Agreement, dated November 
7, 2015, by and between Littelfuse, Inc. and TE 
Connectivity Ltd.

Agreement and Plan of Merger, dated August 25, 2017, 
as amended by Amendment No. 1, dated December 4, 
2017, by and among IXYS Corporation, Littelfuse, Inc., 
Iron Merger Co., Inc., and IXYS Merger Co., LLC.

Certificate of Incorporation dated November 25, 1991, 
as amended April 25, 1997.
Certificate of Designations of Series A Preferred Stock.

Bylaws, as amended and restated January 24, 2019.

Form of Non-Qualified Stock Option Agreement under 
the 1993 Stock Plan for Employees and Directors of 
Littelfuse, Inc. for employees.++

Form of Non-Qualified Stock Option Agreement under 
the 1993 Stock Plan for Employees and Directors of 
Littelfuse, Inc., for non-employee directors. ++

Form of Non-Qualified Stock Option Agreement under 
the Littelfuse, Inc. Equity Incentive Compensation Plan. 
++

Form of Non-Qualified Stock Option Agreement under 
the Littelfuse, Inc. Outside Directors Stock Option Plan.
++

Amended and Restated Employment Agreement dated 
as of December 31, 2007, between Littelfuse, Inc. and 
Gordon Hunter .++

Littelfuse, Inc. Retirement Plan as Amended and 
Restated, effective January 1, 2008 .++

Form of Stock Option Award Agreement under the 
Littelfuse, Inc. Outside Directors' Equity Plan.++

Form of Restricted Stock Unit Award Agreement under 
the Littelfuse, Inc. Outside Directors' Equity Plan.++

Amended and Restated, Littelfuse, Inc. Deferred 
Compensation Plan for Non-Employee Directors.++

Incorporated by Reference Herein

Form

Exhibit

Filing Date

File No.

8-K

8-K

2.1

4/15/2013

0-20388

2.1

11/12/2015

0-20388

S-4/A

Annex A 12/11/2017

333-22114

10-K
8-K

8-K

3.1
4.2

3.1

2/27/2017
12/1/1995

1/25/2019

0-20388
0-20388

0-20388

8-K

99.1

11/12/2004

0-20388

10-K

10.24

3/17/2005

0-20388

8-K

99.4

5/11/2006

0-20388

8-K

99.6

5/11/2006

0-20388

10-K

10-K

8-K

8-K

10.1

2/27/2008

0-20388

10.13

2/27/2008

0-20388

99.3

99.4

5/1/2008

0-20388

5/1/2008

0-20388

10-K

10.4

2/27/2008

0-20388

Exhibit No.

2.1+

2.2+

2.3+

3.1
3.2

3.3

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.8

10.9

10.10

10.11

Form of Restricted Stock Award Agreement under the 
Littelfuse, Inc. Equity Incentive Compensation Plan .++

Form of Stock Option Award Agreement under the 
Littelfuse, Inc. Equity Incentive Compensation Plan .++

8-K

8-K

10.1

4/28/2009

0-20388

10.2

4/28/2009

0-20388

90

Exhibit No.

Description

Form

Exhibit

Filing Date

File No.

Incorporated by Reference Herein

First Amendment to the Amended and Restated 
Littelfuse, Inc. Retirement Plan, effective March 25, 
2009.++

Littelfuse, Inc. Long-Term Incentive Plan, effective 
February 3, 2010.++

Form of Restricted Stock Unit Award Agreement 
(Outside Director) under the Littelfuse, Inc. Long-Term 
Incentive Plan.++

Form of Stock Option Award Agreement under the 
Littelfuse, Inc. Long-Term Incentive Plan.++

First Amendment to the Littelfuse, Inc. Long-Term 
Incentive Plan, effective July 27, 2012.++

Credit Agreement, dated as of May 31, 2013, among 
Littelfuse, Inc., as borrower, JPMorgan Chase Bank, 
N.A. as Agent, Bank of America, N.A., as Syndication 
Agent, Wells Fargo Bank, National Association and 
PNC Bank, National Association, as Co-Documentation 
Agents, J.P. Morgan Securities LLC, as Sole 
Bookrunner and Joint Lead Arranger, and Merrill, 
Lynch, Pierce, Fenner & Smith Incorporated, as Joint 
Lead Arranger.

Master Increasing Lender Supplement, dated as of 
January 30, 2014, among Littelfuse, Inc., as borrower, 
JPMorgan Chase Bank, N.A. as Administrative Agent, 
and each of the banks, financial institutions and other 
institutional lenders listed on the respective signature 
pages thereof.

Littelfuse, Inc. Annual Incentive Plan, effective January 
1, 2014. ++

Amended and Restated Employment Agreement, 
effective as of January 1, 2014, between Littelfuse 
Europe GmbH and Dieter Roeder .++

Change of Control Agreement effective as of February 
10, 2014, between Littelfuse, Inc. and Michael Rutz.++

Termination Amendment to the Littelfuse, Inc. 
Retirement Plan, effective July 31, 2014. ++

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Gordon Hunter.++

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Philip G. Franklin.++

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Dieter Roeder.++

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Ryan K. Stafford.++

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Ian Highley.++

10.12

10.13

10.14

10.15

10.16

10.17

10.18

10.19

10.20

10.21

10.22

10.23

10.24

10.25

10.26

10.27

10-K

10.30

2/26/2010

0-20388

8-K

10.1

5/5/2010

0-20388

S-8

S-8

4.4

4.6

5/19/2010

0-20388

5/19/2010

0-20388

10-K

10.36

2/27/2013

0-20388

8-K

10.1

6/5/2013

0-20388

8-K

10.1

2/4/2014

0-20388

DEF14A

A

3/17/2014

0-20388

10-Q

10-Q

10-Q

8-K

8-K

8-K

8-K

10.2

10.1

5/2/2014

0-20388

5/2/2014

0-20388

10.1

10/31/2014

0-20388

10.1

12/22/2014

0-20388

10.2

12/22/2014

0-20388

10.4

12/22/2014

0-20388

10.5

12/22/2014

0-20388

10-K

10.11

2/24/2015

0-20388

91

Exhibit No.

Description

Form

Exhibit

Filing Date

File No.

10.28

Change of Control Agreement effective as of January 1, 
2015, between Littelfuse, Inc. and Deepak Nayar.++

10-K

10.12

2/24/2015

0-20388

Incorporated by Reference Herein

10.29

10.30

10.31

10.32

10.33

10.34

10.35

10.36

10.37

10.38

10.39

Amendment No. 1, dated as of May 2, 2014, to Credit 
Agreement, dated as of May 30, 2013, by and among 
Littelfuse, Inc., as borrower, JPMorgan Chase Bank, 
N.A. as Agent, and each of the banks, financial 
institutions listed on the respective signature pages 
thereof.

Amendment No. 2, dated as of January 14, 2015, to 
Credit Agreement, dated as of May 31, 2013, by and 
among Littelfuse, Inc., as borrower, JPMorgan Chase 
Bank, N.A. as Agent, and each of the banks, financial 
institutions listed on the respective signature pages 
thereof.

Form of Restricted Stock Unit Award Agreement 
(Executive) under the Littelfuse, Inc. Long-Term 
Incentive Plan.++
Form of Restricted Stock Unit Award Agreement (Tier 
II Management) under the Littelfuse, Inc. Long-Term 
Incentive Plan.++

Amendment No. 3, dated as of May 4, 2015, to Credit 
Agreement, dated as of May 31, 2013, by and among 
Littelfuse, Inc., as borrower, JPMorgan Chase Bank, 
N.A., as Agent, and each of the banks, financial
institutions listed on the respective signature pages 
thereof.

Change of Control Agreement effective as of February 
1, 2016, between Littelfuse, Inc. and Meenal A. Sethna. 
++

Change of Control Agreement effective as of May 26, 
2015 between Littelfuse, Inc. and Matt Cole.++

Credit Agreement, dated as of March 4, 2016 among 
Littelfuse, Inc. and Certain Subsidiaries as borrowers, 
Guarantors party thereto, Bank of America, N.A. as 
Agent, Swing Line Lender and L/C Issuer and 
JPMorgan Chase Bank, N.A. as Syndication Agent, 
BMO Harris Bank, N.A., PNC Bank, National 
Association and Wells Fargo Bank, National Association 
as Co-Documentation Agents, Merril, Lynch, Pierce, 
Fenner & Smith Incorporated, as Sole Bookrunner and 
Joint Lead Arranger and JPMorgan Chase Bank, N.A., 
as Joint Lead Arranger. 

10-K

10.47

2/24/2015

0-20388

10-K

10.48

2/24/2015

0-20388

10-Q

10.2

7/31/2015

0-20388

10-Q

10.3

7/31/2015

0-20388

10-Q

10.1

7/31/2015

0-20388

8-K

10.1

2/3/2016

0-20388

10-K

10.13

3/1/2016

0-20388

Form of Stock Option Award Agreement (Executive) 
under the Littelfuse, Inc. Long-Term Incentive Plan. ++ 10-Q

8-K

10.1

10.3

3/10/2016

0-20388

5/6/2016

0-20388

Form of Stock Option Award Agreement (Outside 
Director – 2016 Grant) under the Littelfuse, Inc. Long-
Term Incentive Plan. ++

Form of Restricted Stock Unit Award Agreement 
(Executive) under the Littelfuse, Inc. Long-Term 
Incentive Plan. ++

10-Q

10.4

5/6/2016

0-20388

10-Q

10.5

5/6/2016

0-20388

92

Exhibit No.

Description

Form

Exhibit

Filing Date

File No.

Incorporated by Reference Herein

Form of Restricted Stock Unit Award Agreement (Tier 
II Management) under the Littelfuse, Inc. Long-Term 
Incentive Plan. ++

Form of Restricted Stock Unit Award Agreement 
(Outside Director – 2016 Grant) under the Littelfuse, 
Inc. Long-Term Incentive Plan. ++

Form of Restricted Stock Unit Award Agreement 
(Executive) under the Littelfuse Inc. Long-Term 
Incentive Plan. ++

Executive Retirement Agreement entered into between 
Littelfuse, Inc. and Gordon Hunter, effective January 1, 
2017. ++

Letter Agreement entered into between Littelfuse, Inc. 
and David W. Heinzmann. Effective January 1, 2017. +
+

Change of Control Agreement effective as of January 1, 
2017, between Littelfuse, Inc. and David W. 
Heinzmann. ++

Littelfuse, Inc. 3.03% Senior Note, Series A, due 
February 15, 2022, and 3.74% Senior Note, Series B, 
due February 15, 2027 Note Purchase Agreement.

Littelfuse, Netherland C.V. 1.14% Senior Note, Series 
A, due December 8, 2023, and 1.83% Senior Note, 
Series B, due December 8, 2028 Note Purchase 
Agreement.

Subsidiary Guaranty Agreement, dated December 8, 
2016.

Subsidiary Guaranty Agreement, dated as of February 
15, 2017.

Restated Littelfuse, Inc. Supplemental Retirement and 
Savings Plan, effective January 1, 2017. ++

Amended and Restated Littelfuse, Inc. 401(k) 
Retirement and Savings Plan, effective January 1, 
2017.++

Amended and Restated Littelfuse, Inc. Long-Term 
Incentive Plan. ++

Form of 2017 Restricted Stock Unit Award Agreement. 
++

Form of 2017 Stock Option Award Agreement. ++

Amended and Restated Employment Agreement, 
effective as of April 18, 2017, between Littelfuse, Inc. 
and Dieter Roeder. ++

Employment offer letter between Littelfuse, Inc. and 
Jeffrey Gorski, dated June 28, 2017. ++

10-Q

10.6

5/6/2016

0-20388

10-Q

10.7

5/6/2016

0-20388

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

10.1

7/26/2016

0-20388

10.1

11/16/2016 0-20388

10.2

11/16/2016 0-20388

10.3

11/16/2016 0-20388

10.1

12/9/2016

0-20388

10.2

10.4

10.2

12/9/2016

0-20388

12/9/2016

0-20388

2/15/2017

0-20388

10-K

10.50

2/27/2017

0-20388

10-K

10.51

2/27/2017

0-20388

8-K

8-K

8-K

10-Q

8-K

10.1

10.2

10.3

10.1

10.1

5/1/2017

0-20388

5/1/2017

5/1/2017

0-20388

0-20388

8/2/2017

0-20388

8/14/2017

0-20388

10.40

10.41

10.42

10.43

10.44

10.45

10.46

10.47

10.48

10.49

10.50

10.51

10.52

10.53

10.54

10.55

10.56

93

Exhibit No.

Description

Form

Exhibit

Filing Date

File No.

10.57

Form of Change of Control Agreement (J. Gorski). ++

8-K

10.2

8/14/2017

0-20388

Incorporated by Reference Herein

First Amendment to Credit Agreement, dated as of 
November 1, 2016, among Littelfuse, Inc., certain 
subsidiaries of the company, as designated borrowers, 
certain subsidiaries of the company, as guarantors, the 
lenders party thereto and Bank of America, N.A., as 
agent.

Second Amendment to Credit Agreement, dated as of 
October 13. 2017, among Littelfuse, Inc., certain 
subsidiaries of the company, as designated borrowers, 
certain subsidiaries of the company, as guarantors, the 
lenders party thereto and Bank of America, N.A., as 
agent.

Joinder Agreement, dated as of October 13, 2017, by 
and between Iron Merger Co., Inc. and Bank of 
America, N.A., as agent.

Joinder Agreement, dated as of October 13, 2017, by 
and between IXYS Merger Co., LLC and Bank of 
America, N.A., as agent.

U.S. Subsidiary Guarantor Supplement, dated as of 
October 13, 2017, made by Iron Merger Co., Inc. in 
favor of the note purchasers and the other holders.

U.S. Subsidiary Guarantor Supplement, dated as of 
October 13, 2017, made by IXYS Merger Co., LLC in 
favor of the note purchasers and the other holders.

Cross Border Subsidiary Guarantor Supplement, dated 
as of October 13, 2017, made by Iron Merger Co., Inc. 
in favor of the note purchasers and the other holders.

Cross Border Subsidiary Guarantor Supplement, dated 
as of October 13, 2017, made by IXYS Merger Co., 
LLC in favor of the note purchasers and the other 
holders.

Note Purchase Agreement, dated November 15, 2017, 
among Littelfuse, Inc. and note purchasers listed on the 
signature pages thereto.

Form of 3.78% Senior Note, Series B, due February 15, 
2030.

Form of 3.48% Senior Note, Series A, due February 15, 
2025,

Subsidiary Guaranty Agreement, dated as of January 16, 
2018, made by LFUS LLC, Littelfuse Commercial 
Vehicle, LLC, Iron Merger Co., Inc., IXYS Merger Co., 
LLC and SymCom, Inc. in favor of the note purchasers 
and the other holders.

Seventh Amended and Restated Employment 
Agreement, dated as of August 25, 2017, by and 
between IXYS Corporation and Nathan Zommer. ++

Littelfuse, Inc. Executive Severance Policy. ++

8-K

10.1

10/16/2017 0-20388

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

8-K

10.2

10/16/2017 0-20388

10.3

10/16/2017 0-20388

10.4

10/16/2017 0-20388

10.5

10/16/2017 0-20388

10.6

10/16/2017 0-20388

10.7

10/16/2017 0-20388

10.8

10/16/2017 0-20388

10.1

11/15/2017 0-20388

4.2

4.1

11/15/2017 0-20388

11/15/2017 0-20388

10.2

1/18/2018

0-20388

10.3

10.4

1/18/2018

0-20388

1/18/2018

0-20388

10.58

10.59

10.60

10.61

10.62

10.63

10.64

10.65

10.66

10.67

10.68

10.69

10.70

10.71

94

Exhibit No.

Description

Form

Exhibit

Filing Date

File No.

10.72

Form of Tier I Change of Control Agreement.++

8-K

10.1

1/23/2018

0-20388

Incorporated by Reference Herein

First Amendment to Littelfuse Deferred Compensation 
Plan for Non-Employee Directors, effective as of 
January 1, 2008.++

Second Amendment to the Littelfuse Deferred 
Compensation Plan for Non-Employee Directors, 
effective as of October 25, 2013.++

First Amendment to the Littelfuse, Inc. 401(K) 
Retirement and Savings Plan, effective January 1, 
2018.++

Altra In-Plan Roth Rollover Amendment to the 
Littelfuse, Inc. 401(K) Retirement and Savings Plan, 
effective as of February 1, 2018.++

Form of Indemnity Agreement by and between Nathan 
Zommer and IXYS Corporation,++
IXYS Corporation 1999 Equity Incentive Plan, as 
amended.++

IXYS Corporation 2009 Equity Incentive Plan++

IXYS Corporation 2011 Equity Incentive Plan++

IXYS Corporation 2013 Equity Incentive Plan++

IXYS Corporation 2016 Equity Incentive Plan++

Zilog, Inc. 2002 Omnibus Stock Incentive Plan++

Zilog, Inc. 2004 Omnibus Stock Incentive Plan++

Form of Stock Option Agreement for the IXYS 
Corporation 1999 Equity Incentive Plan++

Form of Stock Option Agreement for the IXYS 
Corporation 1999 Equity Incentive Plan with net 
exercise provision.++

Form of Stock Option Agreement for the IXYS 
Corporation 1999 Equity Incentive Plan for non-
employee directors++

Notice of Stock Option Grant and Agreement for the 
IXYS Corporation 2009 Equity Incentive Plan++

Form of Nonqualified Stock Option Agreement for 
Stock Options pursuant to the Zilog, Inc. 2002 Omnibus 
Stock Incentive Plan++

10-K

10.73

02/23/2018 0-20388

10-K

10.74

02/23/2018 0-20388

10-K

10.75

02/23/2018 0-20388

10-K

10-K

S-8

S-8

S-8

S-8

S-8

S-8

S-8

10.76

02/23/2018 0-20388

10.3

6/12/2008

000-26124

4.3

4.4

4.5

4.6

4.7

4.8

4.9

1/19/2018

333-221147

1/19/2018

333-221147

1/19/2018

333-221147

1/19/2018

333-221147

1/19/2018

333-221147

1/19/2018

333-221147

1/19/2018

333-221147

10-Q

10.3

11/9/2004

000-26124

10-K

10.23

6/22/2006

000-26124

10-K

10-Q

10.24

6/22/2006

000-26124

10.4

8/10/2009

000-26124

10-K

10.26

6/11/2010

000-26124

10.73

10.74

10.75

10.76

10.77

10.78

10.79

10.80

10.81

10.82

10.83

10.84

10.85

10.86

10.87

10.88

10.89

95

Exhibit No.
10.90

Description

Form of Nonqualified Stock Option Agreement for 
Stock Options pursuant to the Zilog, Inc. 2004 Omnibus 
Stock Incentive Plan++

Incorporated by Reference Herein

Form

Exhibit

10-K

10.28

Filing Date
6/11/2010

File No.
000-26124

10.91

10.92

10.93

10.94

10.95

10.96

10.97

10.98

10.99

Notice of Stock Option Grant and Agreement for IXYS 
Corporation 2011 Equity Incentive Plan++

Notice of Stock Option Grant and Agreement for IXYS 
Corporation 2013 Equity Incentive Plan++

Notice of Stock Option Grant and Agreement for IXYS 
Corporation 2016 Equity Incentive Plan++

10-Q

10-Q

10-Q

10.2

10.6

10.1

8/5/2011

000-26124

8/9/2013

000-26124

11/3/2016

000-26124

Joinder Agreement, dated as of March 14, 2018, by and 
between Clare Capital, Inc., Clare Components, Inc., 
Clare Electronics, Inc., Clare Instruments, Inc., Clare 
Services, Inc., Clare Technologies, Inc., Directed 
Energy, Inc., IXYS Buckeye, LLC, IXYS Integrated 
Circuits Division AV Inc., IXYS Integrated Circuits 
Divisions Inc., IXYS Long Beach, Inc., IXYS USA, 
Inc., Microwave Technology, Inc., Pele Technology, 
Inc., Reaction Technology Incorporation, Zilog, Inc., 
and Bank of America, N.A., as agent.

U.S. Subsidiary Guarantor Supplement, dated as of 
March 14, 2018, made by Clare Capital, Inc., Clare 
Components, Inc., Clare Electronics, Inc., Clare 
Instruments, Inc., Clare Services, Inc., Clare 
Technologies, Inc., Directed Energy, Inc., IXYS 
Buckeye, LLC, IXYS Integrated Circuits Division AV 
Inc., IXYS Integrated Circuits Divisions Inc., IXYS 
Long Beach, Inc., IXYS USA, Inc., Microwave 
Technology, Inc., Pele Technology, Inc., Reaction 
Technology Incorporation and Zilog, Inc. in favor of the 
note purchasers and the other holders.

Cross Border Subsidiary Guarantor Supplement, dated 
as of March 14, 2018, made by Clare Capital, Inc., Clare 
Components, Inc., Clare Electronics, Inc., Clare 
Instruments, Inc., Clare Services, Inc., Clare 
Technologies, Inc., Directed Energy, Inc., IXYS 
Buckeye, LLC, IXYS Integrated Circuits Division AV 
Inc., IXYS Integrated Circuits Divisions Inc., IXYS 
Long Beach, Inc., IXYS USA, Inc., Microwave 
Technology, Inc., Pele Technology, Inc., Reaction 
Technology Incorporation and Zilog, Inc. in favor of the 
note purchasers and the other holders.

Note Purchase Agreement Subsidiary Guarantor 
Supplement, dated as of March 14, 2018, made by Clare 
Capital, Inc., Clare Components, Inc., Clare Electronics, 
Inc., Clare Instruments, Inc., Clare Services, Inc., Clare 
Technologies, Inc., Directed Energy, Inc., IXYS 
Buckeye, LLC, IXYS Integrated Circuits Division AV 
Inc., IXYS Integrated Circuits Divisions Inc., IXYS 
Long Beach, Inc., IXYS USA, Inc., Microwave 
Technology, Inc., Pele Technology, Inc., Reaction 
Technology Incorporation and Zilog, Inc. in favor of the 
note purchasers and the other holders.

Consulting Agreement between Nathan Zommer and 
Littelfuse, Inc., effective August 1, 2018.

Joinder Agreement, dated as of August 22, 2018, by and 
between Reaction Technology Epi, LLC and Reaction 
Tech RE, LLC and Bank of America, N.A., as agent.

96

10-Q

10.1

05/02/2018 0-20388

10-Q

10.2

05/02/2018 0-20388

10-Q

10.3

05/02/2018 0-20388

10-Q

10-Q

10.4

10.1

05/02/2018 0-20388

10/31/2018 0-20388

10-Q

10.2

10/31/2018 0-20388

10-Q

10.3

10/31/2018 0-20388

10-Q

10.4

10/31/2018 0-20388

10-Q

10.5

10/31/2018 0-20388

U.S. Subsidiary Guarantor Supplement, dated as of 
August 22, 2018, made by Reaction Technology Epi, 
LLC and Reaction Tech RE, LLC in favor of the note 
purchasers and the other holders.

Cross Border Subsidiary Guarantor Supplement, dated 
as of August 22, 2018, made by Reaction Technology 
Epi, LLC and Reaction Tech RE, LLC in favor of the 
note purchasers and the other holders.

Note Purchase Agreement Subsidiary Guarantor 
Supplement, dated as of August 22, 2018, made by 
Reaction Technology Epi, LLC and Reaction Tech RE, 
LLC in favor of the note purchasers and the other 
holders.

Joinder Agreement, dated as of October 22, 2018, by 
and between each of (i) Littelfuse International Holding, 
LLC, (ii) Littelfuse Holding, LLC and (iii) Monolith 
Semiconductor Inc. and Bank of America, N.A., as 
agent.

U.S. Subsidiary Guarantor Supplement, dated as of 
October 22, 2018, made by Littelfuse International 
Holding, LLC, Littelfuse Holding, LLC and Monolith 
Semiconductor, Inc. in favor of the note purchasers and 
the other holders.

U.S. (November 2017) Subsidiary Guarantor 
Supplement, dated as of October 22, 2018, made by 
Littelfuse International Holding, LLC, Littelfuse 
Holding, LLC and Monolith Semiconductor, Inc. in 
favor of the note purchasers and the other holders.

Cross Border Assumption Agreement, dated as of 
October 3, 2018, made by each of New Dutch B.V. and 
IXYS Dutch B.V. in favor of the note purchasers and the 
other holders.

Cross Border Subsidiary Guarantor Supplement, dated 
as of October 22, 2018, made by Littelfuse International 
Holding, LLC, Littelfuse Holding, LLC and Monolith 
Semiconductor, Inc. in favor of the note purchasers and 
the other holders.

Summary of Non-Employee Director Compensation.++

Subsidiaries.

Consent of Independent Registered Public Accounting 
Firm.

Certification of Chief Executive Officer Pursuant to 
Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of Chief Financial Officer Pursuant to 
Section 302 of the Sarbanes-Oxley Act of 2002.

Certification of the Chief Executive Officer and Chief 
Financial Officer Pursuant to Section 906 of the 
Sarbanes-Oxley Act of 2002.

10.100

10.101

10.102

10.103*

10.104*

10.105*

10.106*

10.107*

10.108*

21.1*

23.1*

31.1*

31.2*

32.1+++

101.INS*

XBRL Instance Document.

101.SCH*

XBRL Taxonomy Extension Schema Document.

101.CAL*

XBRL Taxonomy Extension Calculation Linkbase
Document.

101.LAB*

XBRL Taxonomy Extension Label Linkbase Document.

101.PRE*

101.DEF*

XBRL Taxonomy Extension Presentation Linkbase
Document.

XBRL Taxonomy Extension Definition Linkbase
Document.

97

* Filed with this Report.

+ Exhibits and schedules omitted pursuant to Item 601(b)(2) of Regulation S-K. Littelfuse agrees to furnish a supplemental copy
of an omitted exhibit or schedule to the SEC upon request.

++ Management contract or compensatory plan or arrangement.

+++ Furnished with this Report.

98

EXECUTIVE OFFICERS

DAVID W. HEINZMANN 
President and 
Chief Executive Officer 

MEENAL A. SETHNA 
Executive Vice President and 
Chief Financial Officer 

RYAN K. STAFFORD 
Executive Vice President, 
Chief Legal and Human 
Resources Officer and 
Corporate Secretary 

MATTHEW J. COLE 
Senior Vice President, 
Business Development and 
Strategy 

ALEXANDER CONRAD 
Senior Vice President and 
General Manager, 
Passenger Vehicle 
Business 

IAN HIGHLEY 
Senior Vice President and 
General Manager, 
Semiconductor Products 
and Chief Technology 
Officer 

DEEPAK NAYAR 
Senior Vice President and 
General Manager, 
Electronics and Industrial 
Business 

MICHAEL P. RUTZ 
Senior Vice President and 
General Manager, 
Semiconductor Products 

BOARD OF DIRECTORS

KRISTINA A. CERNIGLIA 
Senior Vice President and 
Chief Financial Officer 
Hillenbrand, Inc. 

TZAU-JIN CHUNG 
Operating Partner 
Core Industrial Partners, LLC 

CARY T. FU 
Co-Founder and 
Retired Chairman 
Benchmark Electronics, Inc. 

ANTHONY GRILLO 
Founder 
Ascribe Opportunities Management, LLC 

DAVID W. HEINZMANN 
President and 
Chief Executive Officer 
Littelfuse, Inc.

GORDON HUNTER 
Chairman of the Board 
Retired President and Chief Executive Officer 
Littelfuse, Inc. 

JOHN E. MAJOR 
President 
MTSG 

WILLIAM P. NOGLOWS 
Chairman of the Board 
Cabot Microelectronics Corporation 

RONALD L. SCHUBEL 
Retired Executive Vice President and 
President of the Americas Region 
Molex Incorporated 

DR. NATHAN ZOMMER 
Founder, former Chairman and 
Chief Executive Officer 
IXYS Corporation

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CORPORATE INFORMATION 

ANNUAL MEETING 
The Annual Meeting of Littelfuse, Inc. will be held at 9:00 a.m. Central Time on April 26, 2019, at the 
O’Hare Plaza First Floor Conference Center, 8745 West Higgins Road, Chicago, IL 60631. Proxy 
materials and a copy of this report will be mailed or made available via the Internet in advance of the 
meeting to all shareholders of record as of March 1, 2019. 

COMMON STOCK 
Littelfuse, Inc. common stock is traded on the NASDAQ® Global Select Market under the symbol 
LFUS. 

SHAREHOLDER INFORMATION 
In addition to annual reports to shareholders, copies of the Company’s filings with the Securities and 
Exchange Commission are available on the Investor Relations section of our website at: 
investor.littelfuse.com. 

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 
Grant Thornton LLP 
171 N. Clark Street 
Suite 200 
Chicago, IL 60601 

TRANSFER AGENT 
EQ Shareowner Services 
110 Centre Pointe Curve 
Suite 101 
Mendota Heights, MN 55110 
1.800.468.9716 

LITTELFUSE WORLD HEADQUARTERS 
Littelfuse, Inc. 
8755 West Higgins Road 
Suite 500 
Chicago, IL 60631 
+1.773.628.1000 

Littelfuse.com 

© 2019 Littelfuse, Inc.