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Littelfuse

Logo: http://brand.littelfuse.com/media/logos.zip, Non-free logo, via Wikipedia5

American electronic manufacturing company

Littelfuse, Inc. is an American electronics manufacturing company headquartered in Chicago, Illinois. The company primarily produces circuit protection products (fuses) but also manufactures a variety of switches, automotive sensors and, through its subsidiary Zilog, microprocessors. Littelfuse was founded in 1927.3 Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

1927Founded1

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  • TickerLFUS on Nasdaq1
  • Industryelectronics1
  • HeadquartersChicago1
  • Websitewww.littelfuse.com
  • Legal formDelaware corporation1
  • Incorporated inDE6
  • Business address6133 North River Road, Suite 500, Rosemont, Il 600186
  • Filer categoryLarge accelerated filer6
  • LEI549300MY7HLQFYTPCX754
  • StatusActive4
  • LEI statusLapsed (not renewed)4
  • Registered addressC/O THE CORPORATION TRUST COMPANY, 19801 Wilmington, United States4
  • Registered withDivision of Corporations, Department of State, 22799474
Littelfuse box of 10 250V T 1 A L batch 21806 3T fuses
Photo: R. Henrik Nilsson, CC BY 4.0, via Wikimedia Commons9

Littelfuse, Inc. is an American electronics manufacturing company headquartered in Chicago, Illinois. The company primarily produces circuit protection products (fuses) but also manufactures a variety of switches, automotive sensors and, through its subsidiary Zilog, microprocessors. Littelfuse was founded in 1927. In addition to its Chicago, Illinois, world headquarters, Littelfuse has more than 40 sales, distribution, manufacturing and engineering facilities in the Americas, Europe and Asia. Littelfuse is the developer of AutoFuse, the first blade-type automotive fuse.3

Financials

From the company’s reports to the SEC. Every number links to the filing it came from.

Key numbers, fiscal 2025

38.0%Gross margin10
1.6%Operating margin10
-3.0%Net margin10
8.9%Revenue growth, 202510
-3.0%Return on equity10
0.29×Debt to equity10
$366.1MFree cash flow10

What sells

Revenue by product, business segment and region, as the company reports it to the SEC.

Products and services

Electronics - Passive Products and Sensors brought in 28% of the revenue Littelfuse broke down this way in fiscal 2025.

  1. Electronics - Passive Products and Sensors$675.9M1028%up 18% from 2024
  2. Electronics - Semiconductor$669.6M1028%up 9% from 2024
  3. Industrial Products$364.4M1015%up 10% from 2024
  4. Commercial Vehicle Products$320.5M1013%down 0% from 2024
  5. Passenger Car Products$293.6M1012%up 6% from 2024
  6. Automotive Sensors$62.2M103%down 15% from 2024
Products and services by year
Products and services202320242025
Electronics - Passive Products and Sensors$583.0M$571.4M$675.9M
Electronics - Semiconductor$767.4M$615.4M$669.6M
Industrial Products$334.0M$331.6M$364.4M
Commercial Vehicle Products$323.8M$320.5M$320.5M
Passenger Car Products$266.0M$278.3M$293.6M
Automotive Sensors$88.5M$73.6M$62.2M

Business segments

Electronics brought in 56% of the revenue Littelfuse broke down this way in fiscal 2025.

  1. Electronics$1.3B1056%up 13% from 2024
  2. Transportation$676.4M1028%up 1% from 2024
  3. Industrial$364.4M1015%up 10% from 2024
Business segments by year
Business segments202320242025
Electronics$1.4B$1.2B$1.3B
Transportation$678.3M$672.4M$676.4M
Industrial$334.0M$331.6M$364.4M

Regions

Other Countries brought in 41% of the revenue Littelfuse broke down this way in fiscal 2025.

  1. Other Countries$984.4M1041%up 11% from 2024
  2. United States$830.3M1035%up 4% from 2024
  3. China$571.6M1024%up 13% from 2024
Regions by year
Regions202320242025
Other Countries$995.1M$883.8M$984.4M
United States$820.7M$800.3M$830.3M
China$546.8M$506.6M$571.6M

Where the money goes

Where each dollar of revenue went, fiscal 2025

  • Cost of revenue62¢$1.5B
  • Research and development4¢$106.9M
  • Selling, general and admin16¢$381.8M
  • Other costs14¢$342.1M
  • Income tax3¢$75.3M

Out of $2.4B in revenue.10 The company lost money this year.

Where each dollar of operating cash went, fiscal 2025

  • Capital spending16¢$67.6M
  • Dividends paid17¢$72.0M
  • Share buybacks6¢$27.6M
  • Kept or used elsewhere61¢$266.6M

Out of $433.8M of cash from operations.10

Financial statements

Revenue11121310$2.4B in 2025+59% since 2019
0$1.0B$2.0B$3.0B2019: $1.5B$1.5B20192020: $1.4B$1.4B2020−4%2022: $2.5B$2.5B2022+74%2023: $2.4B$2.4B2023−6%2024: $2.2B$2.2B2024−7%2025: $2.4B$2.4B2025+9%
Gross profit11121310$906.0M in 2025+66% since 2019
0$500.0M$1.0B$1.5B2019: $546.3M$546.3M20192020: $501.2M$501.2M2020−8%2022: $1.0B$1.0B2022+101%2023: $900.2M$900.2M2023−11%2024: $787.5M$787.5M2024−13%2025: $906.0M$906.0M2025+15%
Operating income11121310$37.5M in 2025−81% since 2019
0$200.0M$400.0M$600.0M2019: $192.8M$192.8M20192020: $162.4M$162.4M2020−16%2022: $500.8M$500.8M2022+208%2023: $360.9M$360.9M2023−28%2024: $158.8M$158.8M2024−56%2025: $37.5M$37.5M2025−76%
Net income11121310-$71.7M in 2025
-$200.0M0$200.0M$400.0M2019: $139.1M$139.1M20192020: $130.0M$130.0M2020−7%2022: $373.3M$373.3M2022+187%2023: $259.5M$259.5M2023−30%2024: $100.2M$100.2M2024−61%2025: -$71.7M-$71.7M2025

Every line of the income statement as filed: the last 3 fiscal years, latest first.10

Period ending2025-12-312024-12-312023-12-31
Net sales$2.4B$2.2B$2.4B
Cost of sales$1.5B$1.4B$1.5B
Gross profit$906.0M$787.5M$900.2M
Selling, general, and administrative expenses$381.8M$350.4M$354.7M
Research and development expenses$106.9M$107.8M$102.4M
Amortization of intangibles$59.8M$62.1M$65.8M
Restructuring, impairment, and other charges$320.1M$108.4M$16.5M
Total operating expenses$868.5M$628.8M$539.4M
Operating income$37.5M$158.8M$360.9M
Interest expense$34.3M$38.7M$39.9M
Foreign exchange loss (gain)-$16.6M$9.2M-$12.3M
Other income, net-$17.0M-$22.6M-$19.9M
Income before income taxes$3.6M$151.9M$328.6M
Income taxes$75.3M$51.7M$69.1M
Net (loss) income-$71.7M$100.2M$259.5M
Basic (in dollars per share)-$2.89$4.04$10.44
Diluted (in dollars per share)-$2.89$4.00$10.34
Basic (in shares)24.8M shares24.8M shares24.9M shares
Diluted (in shares)24.8M shares25.0M shares25.1M shares

Compare Littelfuse with another company

Corporate structure

Littelfuse sits at the top of its group. 87 entities, 21 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Major holders of Littelfuse

  • Littelfuse Wilmington, Delaware, United States
    • Littelfuse Netherlands B.V. Subsidiary · 100% · Deventer, Netherlands
    • Basler Electric (Suzhou) Co., Ltd. Subsidiary · China
    • Basler Electric Company (HK) Limited Subsidiary · Hong Kong
    • Basler Electric Company, LLC Subsidiary · Delaware, United States
    • Basler Mexico, LLC Subsidiary · Delaware, United States
    • Basler Services, LLC Subsidiary · Illinois, United States
    • C&K Aerospace Subsidiary · France
    • C&K Components (H.K.), Ltd. Subsidiary · Hong Kong
    • C&K Components (Vietnam) Company Limited Subsidiary · Vietnam
    • C&K Components SAS Subsidiary · France
    • C&K Connect Subsidiary · France
    • Carling Technologies Asia-Pacific Limited Subsidiary · Hong Kong
    • Carling Technologies Limited Subsidiary · United Kingdom
    • Carlingswitch Enterprises Limited Subsidiary · Hong Kong
    • Carlingswitch Manufacturing (Zhongshan) Co. Ltd. Subsidiary · China
    • Cole Hersee S de RL de CV Subsidiary · Mexico
    • Comax Electronics (Huizhou) Company Limited Subsidiary · China
    • Comax Industrial Company Limited Subsidiary · Hong Kong
    • Dongguan Littelfuse Electronics Co., Ltd. Subsidiary · China
    • Dortmund Semiconductor GmbH Subsidiary · Germany
    • E.I.S. Electronics GmbH Subsidiary · Germany
    • E.I.S. Electronics Pvt. Ltd Subsidiary · India
    • E.I.S. Holding GmbH Subsidiary · Germany
    • E.I.S. International GmbH Subsidiary · Germany
    • Embed Limited Subsidiary · United Kingdom
    • and 61 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What Littelfuse reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

ItemLatestA year beforeChange
Accumulated depreciation$697.5M10 Dec 27, 2025$625.9M10 Dec 28, 2024+11.4%
Property and equipment, net$540.6M10 Dec 27, 2025$477.1M10 Dec 28, 2024+13.3%
Finance-lease assets$945.0K10 Dec 27, 2025$698.0K10 Dec 28, 2024+35.4%
Operating-lease assets (leased space)$85.3M10 Dec 27, 2025$71.5M10 Dec 28, 2024+19.3%

Real estate and locations

ItemLatestA year beforeChange
Countries it operates in2010 Dec 27, 20252013 Dec 28, 20240%

Investments

ItemLatestA year beforeChange
Cash and cash equivalents$563.4M10 Dec 27, 2025$724.9M10 Dec 28, 2024−22.3%
Marketable securities, current$287.0K10 Dec 27, 2025$976.0K10 Dec 28, 2024−70.6%
Equity securities at fair value$7.7M10 Dec 27, 2025$10.2M10 Dec 28, 2024−24.6%
Stakes in other companies (equity method)$12.3M10 Dec 27, 2025$13.1M10 Dec 28, 2024−6.1%
Long-term investments$20.0M10 Dec 27, 2025$23.2M10 Dec 28, 2024−13.9%

Intangibles and goodwill

ItemLatestA year beforeChange
Goodwill$1.2B10 Dec 27, 2025$1.2B10 Dec 28, 2024−1.4%
Intangible assets, net (excluding goodwill)$594.9M10 Dec 27, 2025$482.1M10 Dec 28, 2024+23.4%
Finite-lived intangibles, gross$1.1B10 Dec 27, 2025$950.4M10 Dec 28, 2024+20.4%
Accumulated amortization$549.0M10 Dec 27, 2025$468.3M10 Dec 28, 2024+17.2%
Finite-lived intangibles, net$594.9M10 Dec 27, 2025$482.1M10 Dec 28, 2024+23.4%

Inventory

ItemLatestA year beforeChange
Inventory, total$416.5M10 Dec 27, 2025$416.3M10 Dec 28, 20240%
Raw materials$186.7M10 Dec 27, 2025$193.8M10 Dec 28, 2024−3.7%
Work in process$131.1M10 Dec 27, 2025$115.5M10 Dec 28, 2024+13.5%
Finished goods$181.4M10 Dec 27, 2025$173.5M10 Dec 28, 2024+4.5%

Properties, in its own words

The Company’s engineering and research and development, manufacturing, sales, warehouses, and distribution centers are located in approximately 80 owned or leased facilities worldwide with primary operations in China, France, Germany, India, Ireland, Italy, Japan, Lithuania, Mexico, Netherlands, Philippines, South Korea, Spain, U.K, the U.S., and Vietnam totaling approximately 5.7 million square feet. The Company’s owned facilities include approximately 3.2 million square feet and the Company’s leased facilities include approximately 2.5 million square feet. The Company’s corporate headquarters is located in the U.S. in Rosemont, Illinois.

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

Item 2 of the 10-K filed Feb 19, 2026.19

The story

Early history

Edward V. Sundt founded Littelfuse in 1927 in Chicago, Illinois as Littelfuse Laboratories. Prior to founding Littelfuse, Sundt had worked for General Electric and Stewart-Warner, where he found diagnostic equipment frequently experienced electrical failure. Sundt developed Littelfuse's first product, a small protective fuse, to regulate current in diagnostic equipment and prevent electrical failure. When the US government refused Sundt a trademark for Little fuse (the small protective fuse) on the grounds that the words were too common, Sundt compromised by reversing the l and the e to form Littelfuse.

Littelfuse was incorporated and renamed Littelfuse, Inc. in 1938.

Littelfuse became a public company in 1962. The company retained founder Edward V. Sundt as the chairman of its board. In 1963, Littelfuse moved its headquarters from Chicago to Des Plaines, Illinois. Sundt retired in 1965 and was succeeded by Thomas Blake. Tracor purchased the company in 1968. Blake was made president of Littelfuse, which operated as a wholly owned subsidiary of Tracor.

1970–1991

The company expanded its manufacturing base in the 1970s with new factories opening in Watseka, Illinois and Piedras Negras, Mexico. In 1974, the company also introduced Littelites, electronic indicator lights used in industrial and office machinery, household appliances and computers.

In 1976, Littelfuse developed Autofuse, which was the first blade-type fuse used in automobiles. The Autofuse brand was counterfeited heavily and in 1983 the company obtained an exclusionary order from the United States International Trade Commission, which barred the importation of counterfeit blade-type fuses.

In 1987, Westmark Systems purchased Tracor and its Littelfuse subsidiary in a leveraged buyout. Tracor filed for bankruptcy in 1991 and spun off Littelfuse.

Modern history

Littelfuse reincorporated in November 1991 with Howard Witt as its president and CEO. Witt had worked for Littelfuse since 1979 and had been president and CEO of Littelfuse since February 1990, when the company was still owned by Tracor. In 1991, Littelfuse offered its second IPO in company history. The company's profits rose throughout the 1990s and the company expanded its operations in Europe and Asia. Littelfuse also expanded into South America with a distribution and engineering center in São Paulo, Brazil.

Gordon Hunter replaced Witt as president and CEO of Littelfuse at the end of 2004. In 2008, Littelfuse restructured its manufacturing operations, closing 16 small manufacturing plants and opening 6 new, larger plants. The company moved its headquarters from Des Plaines, Illinois, to Chicago, Illinois, the same year.

Read the full text

The company was recognized as Product of the Year by Consulting-Specifying Engineer in 2010, 2011, 2012 and 2013. Arrow Electronics recognized Littelfuse with an award for Supplier Excellence in 2011. The company received TTI Supplier's Excellence Award in 2010, 2011, 2012 and 2013. Littelfuse received the Chicago Innovation Award in 2012. In 2013, the company received Processing Magazine's Breakthrough Product of the Year. Littelfuse was recognized as one of the Best Places to Work in Illinois in 2012, 2013 and 2014.

The company announced in November 2016 that COO Dave Heinzmann would succeed Hunter as president and CEO in January 2017.

From Wikipedia’s article on Littelfuse, shared under CC BY-SA 4.0.7

Leadership

Who has led Littelfuse, and when. Pick a name to see everywhere that person has worked.

Board members and other officers (41)

Products and brands

  • fuse

Listed on Wikidata.1

Littelfuse designs and manufactures circuit protection products for the electronics, automotive and electrical industries. The company operates between three business unit segments: Electronics, Industrial, and Automotive. Products include: fuses and protectors, suppressors, gas discharge tubes, electronic switches, solenoids, battery management devices, solid-state relays, and protective relays.

With the acquisition of Hamlin, Inc. in 2013, Littelfuse expanded its product offering to include sensors for the automotive, industrial and consumer industries.

From Wikipedia’s article on Littelfuse, shared under CC BY-SA 4.0.7

Subsidiaries and ownership

Subsidiaries

Subsidiaries (Exhibit 21)

  • Basler Electric (Suzhou) Co., Ltd. China8
  • Basler Electric Company (HK) Limited Hong Kong8
  • Basler Electric Company, LLC Delaware8
  • Basler Mexico, LLC Delaware8
  • Basler Services, LLC Illinois8
  • C&K Aerospace France8
  • C&K Components (H.K.), Ltd. Hong Kong8
  • C&K Components (Vietnam) Company Limited Vietnam8
  • C&K Components SAS France8
  • C&K Components, LLC Delaware8
  • C&K Connect France8
  • Carling Technologies Asia-Pacific Limited Hong Kong8
  • Carling Technologies Limited United Kingdom8
  • Carling Technologies, Inc. Connecticut8
  • Carlingswitch Enterprises Limited Hong Kong8
  • Carlingswitch Manufacturing (Zhongshan) Co. Ltd. China8
  • Cole Hersee S de RL de CV Mexico8
  • Comax Electronics (Huizhou) Company Limited China8
  • Comax Industrial Company Limited Hong Kong8
  • Dongguan Littelfuse Electronics Co., Ltd. China8
  • Dortmund Semiconductor GmbH Germany8
  • E.I.S. Electronics GmbH Germany8
  • E.I.S. Electronics Pvt. Ltd India8
  • E.I.S. Holding GmbH Germany8
All 92 listed subsidiaries
  • E.I.S. International GmbH Germany8
  • Embed Limited United Kingdom8
  • Hamlin Electronics Europe Ltd. United Kingdom8
  • Hamlin Electronics GmbH Germany8
  • Hartland Controls Holding Corp. Delaware8
  • Hartland Controls L.L.C. Illinois8
  • IXYS Global Services GmbH Germany8
  • IXYS IP Holding (Cayman) Limited Cayman Islands8
  • IXYS Integrated Circuits Division, LLC Massachusetts8
  • IXYS Intl Limited Cayman Islands8
  • IXYS Investment Holdings GmbH Germany8
  • IXYS Long Beach, Inc. California8
  • IXYS Semiconductor GmbH Germany8
  • IXYS Semiconductor-Unterstuetzungseinrichtung GmbH Germany8
  • IXYS UK Westcode Ltd. United Kingdom8
  • IXYS USA, LLC Delaware8
  • IXYS, LLC Delaware8
  • Interruptores de Mexico, S.A. de C.V. Mexico8
  • LF Consorcio S. de R.L. de C.V. Mexico8
  • Littelfuse Asia Holding B.V. Netherlands8
  • Littelfuse Asia Sales B.V. Netherlands8
  • Littelfuse Asia Technology B.V. Netherlands8
  • Littelfuse Bidco SAS France8
  • Littelfuse Commercial Vehicle LLC Delaware8
  • Littelfuse Commercial Vehicle Products, Italy S.r.l. Italy8
  • Littelfuse Concord Semiconductor, Inc. Taiwan (China)8
  • Littelfuse Electronics (Kunshan) Co., Ltd. China8
  • Littelfuse Electronics (Shanghai) Co., Ltd. China8
  • Littelfuse Electronics Taiwan Co., Ltd. Taiwan (China)8
  • Littelfuse Europe GmbH Germany8
  • Littelfuse Far East Pte. Ltd. Singapore8
  • Littelfuse France S.A.S. France8
  • Littelfuse GmbH Germany8
  • Littelfuse HK Limited Hong Kong8
  • Littelfuse Holding GmbH Germany8
  • Littelfuse Holding Limited Ireland8
  • Littelfuse Holding, LLC Delaware8
  • Littelfuse International Holding, LLC Delaware8
  • Littelfuse Italian Holdings S.r.l. Italy8
  • Littelfuse Japan G.K. Japan8
  • Littelfuse KK Japan8
  • Littelfuse LT, UAB Lithuania8
  • Littelfuse Mexico Distribution S. de R.L. de C.V. Mexico8
  • Littelfuse Mexico Holding LLC Delaware8
  • Littelfuse Mexico Services, S. de R.L. de C.V. Mexico8
  • Littelfuse Netherlands B.V. Netherlands8
  • Littelfuse Operations India Private Limited India8
  • Littelfuse Phils, Inc. Philippines8
  • Littelfuse S. de R.L. de C.V. Mexico8
  • Littelfuse Semiconductor (Wuxi) Co., Ltd. China8
  • Littelfuse Singapore (Finance) Pte. Ltd. Singapore8
  • Littelfuse Singapore Euro Pte. Ltd. Singapore8
  • Littelfuse Spain S.L.U. Spain8
  • Littelfuse da Amazonia, Ltda. Brazil8
  • Monolith Semiconductor LLC Delaware8
  • Orocontrol de Zacatecas, S.A. de C.V. Mexico8
  • Pele Technology, Inc. Delaware8
  • Productos Electromecanicos BAC, S. de R.L. de C.V. Mexico8
  • Reaction Technology Epi, LLC Delaware8
  • Startco Engineering ULC Canada8
  • Suzhou Littelfuse OVS Co., Ltd. China8
  • SymCom, Inc. Delaware8
  • Transformadores de Piedras Negras, S.A. de C.V. Mexico8
  • Western Automation Research & Development Limited Ireland8
  • Western Automation Research & Development Spain S.L. Spain8
  • Zilog Electronics Philippines, Inc. Philippines8
  • Zilog Philippines, Inc. Philippines8
  • Zilog, Inc. Delaware8

From Wikidata.1 The subsidiaries the company lists in Exhibit 21 of its annual report, as filed.

Acquisitions

  1. Aug 2017IXYS Corporation became a subsidiary1
  2. Aug 2017Zilog became a subsidiary1

Littelfuse has acquired multiple companies since 1999, including:

1999 – Harris Suppression Products.

2002 – Semitron.

2003 – Teccor, a manufacturer of circuit and overvoltage protection products.

Read the full text

2004 – Heinrich Industrie, a German manufacturer of circuit protection products, including the WICKMANN Group, Efen and Pudenz brands.

2006 – Taiwan-based silicon manufacturer Concord Semiconductor, Inc. and Catalina Performance Accessories, which manufactures and distributes blade-type automotive fuses.

2008 – Shock Block Corporation that develop and manufacture ground fault protection technology.

2008 – Startco Engineering, maker of ground-fault protection products and custom-power distribution centers that are used in industrial manufacturing and mining applications.

2010 – Cole Hersee, a maker of power management products, heavy duty electromechanical and switches for commercial vehicles.

2011 – Selco A/S, a Danish company, which produces electrical equipment for use in maritime and industrial environments.

2012 – Accel AB, a Swedish company that manufactures advanced automotive switches and sensors, and Terra Power Systems, which manufactures electrical components for heavy-duty vehicles and trucks.

2013 – Hamlin Inc., an automotive sensors manufacturer.

2014 – SymCom, a power, voltage, and current monitor developer and manufacturer.

2015 – JRS MFG. LTD., a custom engineered products developer and manufacturer, such as metal-clad, metal-enclosed, and arc-resistant switchgear, E-Houses, mine power centers and mining substations.

2016 – TE Connectivity's circuit protection business.

2016 – IGBT and TVS divisions of ON Semiconductor, a semiconductors supplier company.

2017 – U.S. Sensor, Manufacturer of Temperature Sensors.

2017 – IXYS Corp., a power semiconductor manufacturer, thereby also acquiring Zilog

2018 – Monolith Semiconductor Inc., a silicon carbide switch developer and manufacturer.

2021 – Carling Technologies Inc., a switch and electromechanical circuit breaker manufacturer.

2022 – C&K Switches, an electromechanical switch manufacturer

2023 – Western Automation Research and Development Limited, a designer and manufacturer of electrical shock protection devices.

2025 - Basler Electric, a designer and manufacturer of protection relays.

From Wikipedia’s article on Littelfuse, shared under CC BY-SA 4.0.7

Timeline

  1. Sep 17, 20268-K Regulation FD disclosure67
  2. Sep 16, 20268-K Executive or director change68
  3. Aug 11, 20268-K Executive or director change; Regulation FD disclosure69
  4. Jul 29, 20268-K Results of operations; Regulation FD disclosure70
  5. May 14, 20268-K Regulation FD disclosure71
  6. May 6, 20268-K Results of operations; Regulation FD disclosure72
  7. Apr 28, 20268-K Executive or director change; Shareholder vote73
  8. Mar 13, 20268-K Entered a material agreement; New debt or obligation74
  9. Mar 5, 20268-K Executive or director change; Regulation FD disclosure75
  10. Jan 28, 20268-K Results of operations; Regulation FD disclosure76
  11. Jan 8, 20268-K Executive or director change77
  12. Oct 29, 20258-K Results of operations; Regulation FD disclosure78
  13. Apr 28, 2025New chief executive Gregory N. Henderson becomes CEO20
  14. Jan 4, 2017New chief executive David W. Heinzmann becomes CEO21
  15. May 9, 2006New chief executive Gordon Hunter becomes CEO22
  16. 1927Founded Founded1

Calendar

Coming up

  1. Oct 28, 2026 · Before the openReports results for the quarter ending Sep/2026 A year earlier it reported $2.95 a share, on Oct 29, 2025.79

When it reported results

  1. Jul 29, 2026Reported quarterly or annual results70
  2. May 6, 2026Reported quarterly or annual results72
  3. Jan 28, 2026Reported quarterly or annual results76
  4. Oct 29, 2025Reported quarterly or annual results78
  5. Jul 30, 2025Reported quarterly or annual results80
  6. Apr 29, 2025Reported quarterly or annual results81
  7. Jan 28, 2025Reported quarterly or annual results82
  8. Oct 29, 2024Reported quarterly or annual results83

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Filings

608 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 49 major events, 434 insider forms, 15 large holders, 90 other. The latest 20:

  1. Sep 17, 20268-K EDGAR
  2. Sep 16, 20268-K EDGAR
  3. Sep 8, 20264 EDGAR
  4. Sep 8, 20264 EDGAR
  5. Sep 8, 20264 EDGAR
  6. Sep 8, 20264 EDGAR
  7. Sep 8, 20264 EDGAR
  8. Sep 8, 20264 EDGAR
  9. Sep 8, 20264 EDGAR
  10. Sep 8, 20264 EDGAR
  11. Sep 8, 20264 EDGAR
  12. Sep 8, 20264 EDGAR
  13. Sep 8, 20264 EDGAR
  14. Sep 8, 20264 EDGAR
  15. Sep 8, 20264 EDGAR
  16. Sep 8, 20264 EDGAR
  17. Sep 8, 20264 EDGAR
  18. Sep 8, 20264 EDGAR
  19. Sep 8, 20264 EDGAR
  20. Aug 17, 20264 EDGAR

The 608 filings since October 2021 can be filtered by form type and year here when JavaScript is on.

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

96 open-market trades by officers, directors and large owners since October 2021: 1 buys and 95 sales. Grants, option exercises and gifts are left out.

DateWhoTradeSharesPriceValueFiling
Jun 18, 2026Gorski Jeffrey GSVP & Chief Accounting OfficerSale1,389$482.48$670.2KForm 4
Jun 15, 2026HUNTER GORDONDirectorSale1,432$480.00$687.4KForm 4
Jun 11, 2026GRILLO ANTHONYDirectorSale3,000$451.96$1.4MForm 4
Jun 3, 2026HUNTER GORDONDirectorSale603$488.31$294.5KForm 4
Jun 2, 2026Kim Peter Sung-JipSVP & GM Industrial BusinessSale10,171$486.17$4.9MForm 4
May 20, 2026Chu MaggieSVP, CHROSale11,397$435.48$5.0MForm 4
May 18, 2026Ruppel DavidSVP & GM Transportation Bus.Sale506$445.16$225.3KForm 4
May 18, 2026Nayar DeepakSVP & GM Electronics BusinessSale5,911$446.78$2.6MForm 4
Apr 30, 2026Chu MaggieSVP, CHROSale282$396.90$111.9KForm 4
Apr 28, 2026Chu MaggieSVP, CHROSale815$392.47$319.9KForm 4
Feb 24, 2026Cerniglia Kristina A.DirectorSale2,343$368.38$863.1KForm 4
Feb 20, 2026HUNTER GORDONDirectorSale911$367.68$335.0KForm 4
Feb 10, 2026GRILLO ANTHONYDirectorSale5,000$346.24$1.7MForm 4
Feb 6, 2026Gorski Jeffrey GSVP & Chief Accounting OfficerSale2,500$346.89$867.2KForm 4
Feb 5, 2026Gorski Jeffrey GSVP & Chief Accounting OfficerSale3,500$330.32$1.2MForm 4
Feb 4, 2026Chu MaggieSVP, CHROSale2,061$326.71$673.3KForm 4
Feb 2, 2026Ruppel DavidSVP & GM Transportation Bus.Sale1,495$321.17$480.2KForm 4
Feb 2, 2026Kim Peter Sung-JipSVP & GM Industrial BusinessSale5,488$326.35$1.8MForm 4
Feb 2, 2026Nayar DeepakSVP & GM Electronics BusinessSale8,875$321.55$2.9MForm 4
Feb 2, 2026Stafford Ryan KExecutive VP, CLO & Corp SecSale16,839$325.25$5.5MForm 4

All 96 trades can be filtered by person here when JavaScript is on.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

Executive pay

What the company paid its top executives, from the summary compensation table in its proxy statement. Total pay includes salary, bonus, stock and option awards and other pay, as the company valued them.

YearExecutiveAgeSalaryTotal pay
2025Gregory N. HendersonPresident and Chief Executive Officer$895.8K$19.6M90
2025Abhishek KhandelwalExecutive Vice President and Chief Financial Officer$347.2K$5.4M90
2025Meenal A. SethnaFormer Executive Vice President and Chief Financial Officer$476.3K$5.1M90
2025Ryan K. StaffordExecutive Vice President, Chief Legal Officer and Corporate Secretary$605.2K$4.0M90
2025Chad MarakFormer Senior Vice President and General Manager, Semiconductor Products$380.1K$3.5M90
2025Deepak NayarSenior Vice President and General Manager, Electronics Business$532.5K$2.9M90
2025Peter KimSenior Vice President and General Manager, Industrial Business$406.2K$2.6M90
2025David W. HeinzmannFormer President and Chief Executive Officer$770.2K$831.5K90
2024David W. HeinzmannFormer President and Chief Executive Officer$1.0M$6.3M90
2024Meenal A. SethnaFormer Executive Vice President and Chief Financial Officer$613.2K$2.5M90
2024Ryan K. StaffordExecutive Vice President, Chief Legal Officer and Corporate Secretary$586.9K$2.4M90
2024Deepak NayarSenior Vice President and General Manager, Electronics Business$515.8K$2.0M90
2024Chad MarakFormer Senior Vice President and General Manager, Semiconductor Products$430.4K$1.5M90
2023David W. HeinzmannFormer President and Chief Executive Officer$997.7K$6.6M90
2023Meenal A. SethnaFormer Executive Vice President and Chief Financial Officer$569.4K$2.6M90
2023Ryan K. StaffordExecutive Vice President, Chief Legal Officer and Corporate Secretary$566.3K$2.5M90
2023Deepak NayarSenior Vice President and General Manager, Electronics Business$496.0K$1.8M90

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

FundSharesValueShare of the fundChange
BlackRock, Inc.2,523,051$1.1B0.0%+174,016
Vanguard Portfolio Management LLC1,504,081$684.9M0.0%−62,996
Vanguard Capital Management LLC1,141,062$519.6M0.0%+14,792
Van Lanschot Kempen Investment Management N.v.933,511$425.1M3.3%−49,203
State Street Corp794,167$361.6M0.0%+23,267
Mairs & Power Inc602,104$274.2M2.5%−122,606
Geode Capital Management, LLC583,297$265.6M0.0%+92,925
Morgan Stanley471,250$214.6M0.0%+44,218
Neuberger Berman Group LLC467,862$213.0M0.1%−273,321
Dimensional Fund Advisors LP445,099$202.7M0.0%−57,710
Barrow Hanley Mewhinney & Strauss LLC406,424$185.1M0.6%−50,742
Invesco Ltd.393,933$179.4M0.0%+251,621
Wellington Management Group Llp363,183$165.4M0.0%−114,346
Earnest Partners LLC351,359$160.0M0.6%−17,104
Jane Street Group, LLC348,003$158.5M0.1%+284,723
Silvercrest Asset Management Group LLC343,546$156.4M1.0%−7,310
William Blair Investment Management, LLC321,681$146.5M0.4%+17,106
Norges Bank317,164$144.4M0.0%New
Charles Schwab Investment Management Inc316,657$144.2M0.0%−14,583
Boston Trust Walden Corp298,327$135.8M1.0%+6,934
American Century Companies Inc283,397$129.0M0.1%+3,927
Principal Financial Group Inc269,122$122.5M0.1%+11,935
Bank Of America Corp /de/253,237$115.3M0.0%+24,010
Alliancebernstein L.P.337,627$114.6M0.0%+16,086
Copeland Capital Management, LLC251,346$114.4M2.4%−12,050

13F reports cover disclosed long positions in U.S. stocks only.

Members of Congress who traded it

3 trades disclosed by members of Congress. “Vs S&P since” is the stock’s change since the trade minus the S&P 500’s.

DateMemberTradeAmountVs S&P sinceFiling
May 12, 2025Jefferson ShreveRepublican, HouseSale$15,001 - $50,000−47.6%Report
Apr 17, 2025Jefferson ShreveRepublican, HouseBuy$15,001 - $50,000+108.0%Report
Mar 13, 2025Jefferson ShreveRepublican, HouseSale$15,001 - $50,000−51.1%Report

Members report amounts as ranges, not exact figures. Returns are price-only (no dividends).

SEC filer profile

How Littelfuse is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

  • Name on EDGARLITTELFUSE INC /DE2
  • CIK0000889331
  • Employer ID (EIN)36-379574219
  • Filer statusLarge accelerated filer not an emerging growth company; not a smaller reporting company; not a shell company19
  • Incorporated inDelaware19
  • Fiscal year endsDecember 262
  • Industry code (SIC)3613 Switchgear & Switchboard Apparatus2
  • SEC reviewing officeOffice of Manufacturing, Division of Corporation Finance2
  • Business address6133 North River Road, Suite 500, Rosemont, IL 600182
  • Phone773-628-10002
  • Shares outstanding25,288,904 as of May 1, 202616
  • Public float$5.6B as of Jun 28, 202519
  • Auditors/ Deloitte & Touche LLP, Chicago, Illinois PCAOB ID 34; it also attests to the company’s internal control over financial reporting19
  • On EDGAR sinceFeb 13, 19962
  • Filings2,639 in all: 4 (1,816), 8-K (238), SC 13G/A (110), 10-Q (92), 144 (66), SC 13G (41), 3 (35), DEF 14A (31)2
    All 38 form types

    10-K (28), UPLOAD (28), 11-K (20), 4/A (20), CORRESP (20), DEFA14A (19), SD (13), S-8 (8), 8-K/A (7), 10-Q/A (6), 425 (6), 5 (6), ARS (4), S-8 POS (3), 10-K/A (2), 10-K405 (2), EFFECT (2), S-4/A (2), SCHEDULE 13G (2), SCHEDULE 13G/A (2), 3/A (1), 424B3 (1), 5/A (1), DEFR14A (1), NT 10-K (1), NT 10-Q (1), POS AM (1), PRE 14A (1), PRER14A (1), S-4 (1)

  • Latest filingsAnnual report (10-K) Feb 19, 2026
    Quarterly report (10-Q) Jul 29, 2026
    Proxy statement (DEF 14A) Mar 12, 2026
    Latest 8-K (8-K) Sep 17, 2026

Securities registered for trading

ClassSymbolExchange
Common Stock, $0.01 par valueLFUSNASDAQ

From the cover page of the 10-K filed Feb 19, 2026 (Section 12(b) of the Exchange Act).19

Risk factors and legal proceedings

The risks Littelfuse names in Item 1A of its 10-K filed Feb 19, 2026: 25 risks under these headings, as written.19

  • The Company’s industry is subject to intense competitive pressures.
  • 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.
  • Disruptions in the Company’s manufacturing, supply or distribution chain could result in an adverse impact on results of operations.
  • The Company may be unable to manufacture and deliver products in a manner that is responsive to its customers’ needs.
  • The Company’s business may be interrupted by labor disputes or other interruptions of supplies.
  • Failure to attract and retain qualified personnel could affect the Company’s business results.
  • The Company may not be successful in protecting its intellectual property.
  • The Company may incur material losses and costs as a result of defects in its products, including as a result of warranty claims, product recalls, and product liability.
  • Climate change, and the regulatory and legislative developments related to climate change, may have a material adverse impact on our business and results of operations.
  • Changes in U.S. and other countries 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 Company is exposed to political, economic, and other risks that arise from operating a multinational business.
  • Environmental liabilities could adversely impact the Company’s financial position.
The other 13 risks
  • The Company’s effective tax rate could materially increase as a consequence of various factors, including 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.
  • The Company’s ability to manage currency or commodity price fluctuations or supply shortages is limited.
  • A significant fluctuation between the U.S. dollar and other currencies could adversely impact the Company's revenue and earnings.
  • The Company’s revenues may vary significantly from period to period.
  • Reorganization activities may lead to additional costs and material adverse effects.
  • 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.
  • Ineffective internal controls could impact the accuracy and timely reporting of our business and financial results.
  • The bankruptcy or insolvency of a major customer could adversely affect the Company.
  • The inability to maintain access to capital markets may adversely affect the Company’s business and financial results.
  • Fixed costs may reduce operating results if sales fall below expectations.
  • 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 Company is exposed to, and may be adversely affected by, potential security breaches or other disruptions to its information technology systems and data security.
  • Customer demands and regulations related to conflict-free minerals may force the Company to incur additional expenses.

Legal proceedings

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

The opening of Item 3, Legal Proceedings.19

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