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Form 8-K

sec.gov

8-K — LITTELFUSE INC /DE

Accession: 0001140361-26-021160

Filed: 2026-05-14

Period: 2026-05-14

CIK: 0000889331

SIC: 3613 (SWITCHGEAR & SWITCHBOARD APPARATUS)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — ef20073358_8k.htm (Primary)

EX-99.1 — EXHIBIT 99.1 (ef20073358_ex99-1.htm)

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8-K

8-K (Primary)

Filename: ef20073358_8k.htm · Sequence: 1

falseLITTELFUSE INC /DE0000889331NASDAQ00008893312026-05-142026-05-14

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): May 14, 2026

LITTELFUSE, INC.

(Exact Name of Registrant as Specified in Charter)

Delaware

0-20388

36-3795742

(State or Other Jurisdiction of Incorporation)

(Commission File Number)

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

6133 N. River Rd.

Suite 500

Rosemont, IL 60018

(Address of Principal Executive Offices, and Zip Code)

(773) 628-1000

Registrant’s Telephone Number, Including Area Code

N/A

(Former name, former address and former fiscal year, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the

following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

Common Stock, par value $0.01 per share

LFUS

NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405 of this

chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2 of this chapter).

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. ☐

Item 7.01.

Regulation FD Disclosure.

A copy of the presentation slides to be used by Littelfuse, Inc., a Delaware corporation (the “Company”) at its Investor Day presentation on May 14,

2026, is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information in Exhibit 99.1 shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 nor shall it be

deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such filing.

Item 9.01

Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number

Description

99.1

Investor Presentation, dated May 14, 2026.

104

Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

* 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.

SIGNATURE

Pursuant to the requirements 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.

Date: May 14, 2026

LITTELFUSE, INC.

By:

/s/ Anne-Marie D’Angelo

Name:

Anne-Marie D’Angelo

Title:

Senior Vice President, Chief Legal Officer and Corporate Secretary

EX-99.1 — EXHIBIT 99.1

EX-99.1

Filename: ef20073358_ex99-1.htm · Sequence: 2

Exhibit 99.1

2026 Investor Day  May 14 | New York City

Welcome andOpening Remarks  VP, Investor Relations  David Kelley

Disclaimers  Important Information About Littelfuse, Inc. This presentation does

not constitute or form part of, and should not be construed as, an offer or solicitation to purchase or sell securities of Littelfuse, Inc. and no investment decision should be made based upon the information provided herein. Littelfuse

strongly urges you to review its filings with the Securities and Exchange Commission, which can be found at investor.littelfuse.com. This website also provides additional information about Littelfuse. The information on our website is not part

of, and is not incorporated into, this presentation.  “Safe Harbor” Statement Under the Private Securities Litigation Reform Act of 1995. These risks, uncertainties and other factors include, but are not limited to, risks and uncertainties

relating to general economic conditions; 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; cybersecurity matters; failure of an indemnification for environmental liability; changes in import and export duty and tariff rates; exchange rate fluctuations; commodity price fluctuations; the effect of the

Company’s accounting policies; labor disputes and shortages; restructuring costs in excess of expectations; pension plan asset returns less than assumed; uncertainties related to political or regulatory changes; integration of acquisitions may

not be achieved in a timely manner, or at all; limited realization of the expected benefits from investment and strategic plans; the risk that expected benefits, synergies and growth prospects of the Basler acquisition and/or potential future

acquisitions may not be achieved in a timely manner, or at all; the risk that Basler’s business may not be successfully integrated with Littelfuse acquisition of Basler; the risk that the Company's investments in its serviceable addressable

markets does not result in the projected growth or synergies; and other risks which may be detailed in the company’s Securities and Exchange Commission filings. Should one or more of these risks or uncertainties materialize or should the

underlying assumptions prove incorrect, actual results and outcomes may differ materially from those indicated or implied in the forward-looking statements. This presentation should be read in conjunction with information provided in the

financial statements appearing in the company’s Annual Report on Form 10-K for the year ended December 27, 2025. Further discussion of the risk factors of the company can be found under the caption “Risk Factors” in the company’s Annual Report

on Form 10-K for the year ended December 27, 2025, and in other filings and submissions with the SEC, each of which are available free of charge on the company’s investor relations website at investor.littelfuse.com and on the SEC’s website at

http://www.sec.gov. These forward-looking statements are made as of the date hereof. The company does not undertake any obligation to update, amend or clarify these forward-looking statements to reflect events or circumstances after the date

hereof or to reflect the availability of new information.  Non-GAAP Financial Measures. The information included in this presentation includes the non-GAAP financial measures of organic net sales growth, adjusted operating margin, adjusted

EBITDA margin, adjusted diluted earnings per share, adjusted effective tax rate, free cash flow conversion, and consolidated net leverage ratio (as defined in the credit agreement). A reconciliation of these non-GAAP financial measures to the

most directly comparable GAAP financial measures are set forth in the appendix. The company believes that these non-GAAP financial measures provide useful information to investors regarding its operational performance, ability to generate cash

and its credit position enhancing an investor’s overall understanding of its core financial performance. The company believes that free cash flow is a useful measure of its ability to generate cash. The company believes that these non-GAAP

financial measures are commonly used by financial analysts and provide useful information to analysts. Management uses these measures when assessing the performance of the business and for business planning purposes. Note that the definitions

of these non-GAAP financial measures may differ from those terms as defined or used by other companies.

Who We Are Today: Littelfuse Snapshot (NASDAQ: LFUS)  A Market Leader in Shaping

Solutions for the Safe and Efficient Transfer of Electrical Energy  1927  Founded  ~17,000  Total Employees  $2.4B  2025 Revenue  $499M  2025 EBITDA  $366M  2025 FCF  1.0x  Net Leverage  COMPANY OVERVIEW  2025 REVENUE BY END MARKET  Energy and

Industrial Infrastructure (EII)  Industrial Infrastructure  Energy Infrastructure  Computing, Communications & Diversified Industrials (CCDI)  Data Center & Building Infrastructure  Diversified Industrials  Consumer

Electronics  Transportation & Logistics (T&L)  Passenger Vehicle  Commercial Vehicle  End Market  9%  21%  7%  17%  9%  18%  19%

Today’s Agenda  Moving the World Forward in Transportation & Logistics

(T&L)  Dave Ruppel | SVP & GM, T&L Market  Accelerating Long-Term Growth through Semiconductor Innovation  Karim Hamed | SVP & GM, Semiconductor Products  Delivering More Resilient Growth and Scaling Operational Excellence to

Drive Strong Shareholder ValueAbhi Khandelwal | EVP & CFO  Closing Remarks: The Leader in Safe and Efficient Electrical Energy Transfer  Greg Henderson | President & CEO  Welcome and Opening Remarks  David Kelley | VP, Investor

Relations  Shaping the Future of Global Electrification  Greg Henderson | President & CEO  Building a Brighter Global Future through Energy & Industrial Infrastructure (EII)  Peter Kim | SVP & GM, EII Market  Strengthening Our

Leadership Position in Computing, Communications, and Diversified Industrials (CCDI)  Deepak Nayar | SVP & GM, CCDI Market  BREAK  10:00 AM  Q&A SESSION  11:15 AM  LEADERSHIP LUNCHEON  12:00 PM  9:00 AM  10:15 AM

President & CEO  Greg Henderson  Shaping the Future of Global Electrification

Differentiated and Timely Opportunity to Capitalize onGlobal Electrification

Megatrend  Computing, Communications & Diversified Industrials (CCDI)  Energy & IndustrialInfrastructure (EII)  Transportation & Logistics(T&L)  GLOBAL ELECTRICITY DEMAND IS ACCELERATING  36,000 TWh by 2030 Driven by a Growing

Need Across Our End Markets | 50% “DC Native” Demand by 2030 vs. 25% Today1   1 Company estimate.

We Are the Enablers – From Milliwatts to Megawatts  HIGHER CURRENT   HIGHER

VOLTAGE  HV Data Center Rack  LV Data Center Rack  Grid Transmission Substation  Passenger Vehicle Electrification  Solar Power Generation  BESSContainer  GlucoseMonitor  Material Handling  CommercialSpace  Commercial

HVAC  USB-CProtection  E-Bike  Medium- & High-Voltage Industrial Drives  SmartMeter  Commercial Vehicle Electrification  Providing Safe and Efficient Transfer of Electrical Energy Across the Power Spectrum  Computing, Communications &

Diversified Industrials (CCDI)  Energy & IndustrialInfrastructure (EII)  Transportation & Logistics(T&L)

Overvoltage  BROAD-BASED TECHNOLOGY EXPERTISE  Value Proposition – Delivering a

Complete Set of Solutions toSolve Customers’ Complex Challenges  Protects against too much voltage, suppressing surges and spikes  Unrivaled Ability to Provide Protection Across Electrical Ecosystem at a Global Scale  Advanced Protection &

Power Solutions  Provides smart, integrated control by detecting, responding, and managing faults in real time  Power Semis to Protective Relays  MOVs to Semiconductor Protection  Overcurrent  Protects against too much current, stopping

overheating and damage  Fuses to Circuit Breakers

Poised to Capitalize on Accelerating End-Market Growth  LITTELFUSE SAM IS GROWING

MID-SINGLE DIGITS  $22B SAM1  $30B SAM1  2025  2030  POSITIONING US FOR ACCELERATING GROWTH  $4.5B   Revenue  $1.1B  Adj. EBITDA  Our 2030 Ambition  Energy and Industrial Infrastructure Market (EII)  Transportation & Logistics Market

(T&L)  Computing, Communications & Diversified Industrials Market (CCDI)  1 Company estimate.

Evolution of Our Long-Term Strategic Priorities  SharpenedFocus on Growth

Opportunities  Partneringwith Market Leaders  Enhancing Operational Excellence

Sharpened Focus onThree Key High-Growth Opportunities (HGOs)   HIGH-GROWTH

OPPORTUNITIES Growing +Double-Digits CAGR  Energy and Industrial Infrastructure Market (EII)  Grid & Utility Infrastructure  Computing, Communications & Diversified Industrials Market (CCDI)  Data Center  Aerospace & Defense  End

Market  Above-Market Driven by Capabilities and Go-To-Market  CORE GROWTHGrowing Mid-Single-Digits CAGR  Overcurrent  Overvoltage  Advanced Protection & Power Solutions  SHARPENED FOCUS

Our Strategic Approach to M&A  Strengthen Solutions Capabilities  Expand

solutions for customers’ next-gen architectures  Enhance technology leadership positioning in safe and efficient electrical energy transfer  Bolster partnerships with market leaders  FOCUS ON ACCELERATING HIGH-GROWTH OPPORTUNITIES  Enhance

Market Exposure  Amplify exposure to HGOs: Grid & Utility Infrastructure, Data Center, and A&D  Expand to adjacent market or regional opportunities  Drive addressable market expansion and diversification  SHARPENED FOCUS

New Market-Oriented Sales Structure Enhances Partnerships  Optimized Go-to-Market

Approach Drives Greater Intentionality Around Cross-Sell Opportunities  CUSTOMER SEGMENTATION FUELING GROWTH ENABLERS  ~2/3 of Revenue: Direct Customer Partnership  Strategic Partnership Focused on Solving Complex Problems to Drive

Innovation  Global Leading and Emerging Customers  ~1/3 of Revenue: Served via Distribution Channel  Partnerships (Over 100,000 Customers) with a Long Tail and Strong Profitability  Broad Market Customers  PARTNERING WITH  MARKET LEADERS

Go-to-Market Strategy In-Action  2020 – 2025 ExampleGlobal EV and Clean Energy

Leader  Littelfuse Solutions Are in Every Product for This Customer  2025 – 2030 OpportunityData Center HGO  Significant Content Opportunity with Market Leaders  Scaling Our Go-To-Market Strategy Across Our Marketsto Unlock Significant

Profitable Growth  >20%  CAGR(2020 – 2025)  +2x  2025 Design Wins  PARTNERING WITH  MARKET LEADERS

Scaling Operational Excellence Across Our Organization  Elevating Our Operational

Mindset  Driving Portfolio and Footprint Optimization  SQDCI = Safety, Quality, Delivery, Cost, Inventory.  Scaling Business and AI Processes  Leveraging best practices  Programmatic SQDCI initiatives  Deploying global operating

model  Sharpened customer focus  Continuous portfolio rationalization  Footprint optimization  Scalable resource allocation  AI-enabled productivity enhancements  Enhanced acquisition execution  OPERATIONAL  EXCELLENCE

Right Strategy to Capitalize on Our Opportunities  Unparalleled Capabilities to

Enable Transformation and Enhance Growth  Transformational Shift in Electrification of Our Markets  Why We Are Excited for the Future   Driving Value for Stakeholders

Building a Brighter GlobalFuture through Energy and Industrial Infrastructure

(EII)  SVP & GM, EII Market  Peter Kim

Key Messages  Capturing accelerating global demand for energy expansion,

electrification, and industrial infrastructure through differentiated, mission-critical solutions  1  Enabling the modernization of industrial markets through safe, reliable, and efficient high-power systems  2  Positioned as a systems solution

partner by expanding integrated technologies for leading global customers  3

Energy & Industrial Infrastructure Market Snapshot  KEY HIGHLIGHTS  EII END

MARKETS AS A % OF TOTAL 2025 REVENUE1  EXAMPLES OF MARKET-LEADING CUSTOMERS  1 Pro-forma inclusive of Basler.  ~$600M1  2025 EII Revenue  Expanding Global Customer Base  Leading: 43% • Emerging: 24% • Broad: 33%  (% of 2025 EII

Revenue)  Industrial Infrastructure  Industrial Automation  Mining, Oil & Gas  Commercial Construction  Building Infrastructure  Energy Infrastructure  Grid & Utility   Battery Energy Storage Systems

(BESS)  Renewables  9%  21%  7%  17%  9%  18%  19%

2025   2030   Positioned to Grow Significantly Above Market  Leading EII market

growth drivers  Grid & Utility Infrastructure  Battery Energy Storage Systems  Data Center Infrastructure  Renewables  1 Company estimate.  Serviceable Addressable Market1  ~6%Market Growth Rate1(2025 – 2030)  +Double DigitsLFUS Growth

Rate1 (2025 – 2030)

Our Right to Win – EII Sustainable Competitive Advantages  Increased focus with

leading OEM customers supported by strong channel partnerships  Solution selling with opportunity to expand system-level partnerships  Complex, customized innovation driven by market-leading engineering and technology capabilities   Deep

solution-level collaboration with market leading customers  Product Performance  Best-in-class, high-power products enable leading prevention measures, performance, quality, and reliability for our customers’ applications  OEM

Relationships  TailoredSolutions

Capitalizing on Our Growth Opportunities  23  INVESTOR DAY 2026  Energy

Infrastructure   Industrial Infrastructure

Industrial InfrastructureCapitalizing on Long-Term Growth and

Modernization  Trusted Partner Powering the Next Generation of Industrial Systems  ~2x  CAPITAL SPEND IN INDUSTRIAL ELECTRIFICATION IN THE NEXT 5 YEARS  Key Drivers of Market Growth  Our Opportunity  System-level solutions enabled through broad

technology offering  Reduced customer design complexity through application-tailored sub-systems  Deep technical expertise supported by global engineering teams and laboratories  Electrification of Industrial Systems  Increased Adoption of

Smarter and Connected Solutions  Improving Energy Efficiency and Sustainability  1  1 Company estimate.

Customer Success StoryLeading Solutions for Next Generation of

Industrialization  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  As automation systems advance, industrial OEMs face rising demand for power stability, efficiency, and safety – driving need for reliable systems and sustained

uptime  High-performance power semiconductors improve system reliability and efficiency  Fast-acting fuses enable system protection, maximizing uptime  Intelligent protective relays ensure safety and scalable operations  Customer

Value  Littelfuse Value  Increase Asset Reliability by 25%  Minimize Energy Losses and Improve System Efficiency by +3%  System SolutionsDrive 2x Opportunity  Solution is ScalableAcross Industrial Markets

Energy InfrastructureCapitalizing on Significant Grid & Utility Infrastructure

Investment  Well-Positioned to Enable Accelerating Grid & Utility Infrastructure Evolution  +$3T  ESTIMATED GRIDINVESTMENT THROUGH 2030  Key Drivers of Market Growth  Rapidly Expanding Electricity Demand  Modernization of Aged

Infrastructure  Rising Need for Grid Flexibility  Our Opportunity  Higher power requires more innovative solutions  Our leading technology capabilities strengthen grid resilience   Basler acquisition enhances our differentiated system- level

capabilities  1  1 Company estimate.  High Growth Opportunity

Customer Success StoryComprehensive Protection and Switching for BESS

Architecture  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  As BESS system scaled to higher power levels, an integrator faced challenges ensuring end-to-end protection and safe, reliable grid connectivity  Coordinated, high-voltage DC fuses enable

seamless system-wide protection  Integrated power semiconductor solutions drive more efficient switching architecture   Basler protection relays enhance intelligent power monitoring, designed to promote longer uptime   Customer

Value  Littelfuse Value  High Growth Opportunity  Reduce Unplanned Downtime by 40%  System-SafetyArchitecture Drives Faster Utility Integration   Application Engineering Expertise to be Trusted Partner of Choice  Protection Solutions Become

Standard Reference for New Designs

Capturing accelerating global demand for energy expansion, electrification, and

industrial infrastructure through differentiated, mission-critical solutions  1  Enabling the modernization of industrial markets through safe, reliable, and efficient high-power systems  2  Positioned as a systems solution partner by expanding

integrated technologies for leading global customers  3  Key Takeaways  28  INVESTOR DAY 2026

Deepak Nayar  SVP & GM, CCDI Market  Strengthening Our Leadership Position in

Computing, Communications, and Diversified Industrials (CCDI)

Key Messages  Capitalizing on megatrends in electrification, driven by outsized

growth from Data Centers and Aerospace & Defense  1  Delivering differentiated, high-value solutions to solve more complex customer challenges  2  Expanding go-to-market model with increased emphasis on growing with our key customers as

they shift to new technology platforms  3

Computing, Communications, and Diversified Industrials Market Snapshot  KEY

HIGHLIGHTS  CCDI END MARKETS AS A % OF TOTAL 2025 REVENUE  Data Center & Building Infrastructure  Data Center  Building & Industrial Controls  Diversified Industrials  Aerospace & Defense  Medical  Broad Distribution Reach  Consumer

Electronics  Consumer Electronics  Appliances  EXAMPLES OF MARKET-LEADING CUSTOMERS  ~$1,100M  2025 CCDI Revenue  Extensive Global Customer Base  Leading: 33% • Emerging: 33% • Broad: 34%  (% of 2025 CCDI

Revenue)  9%  21%  7%  17%  9%  18%  19%

2025   2030   Data Center  Diversified   Industrials  Positioned to Grow in

Attractive Addressable Market  1 Company estimate.  Leading ccdi market growth drivers  Serviceable Addressable Market1  ~8%Market Growth Rate1(2025 – 2030)  +Double DigitsLFUS Growth Rate1 (2025 – 2030)

Our Right to Win – CCDI Sustainable Competitive Advantages  Leadership position in

passives and protection with complementary high-voltage semiconductor capabilities  Ability to win with portfolio breadth as our complementary products enable a more complete customer solution and competitive advantage  Alignment with customers

in product development at the engineering level to co-create solutions for next-gen architectures  Go-to-market model shift to better serve customers with full solution set  Engineering expertise to solve complex protection challenges in data

center, aerospace & defense and diversified industrials   Proven track record of delivering market-leading and reliable technologies to meet customer needs  ProductPortfolio  Customer Collaboration  Technology Differentiation

Capitalizing on Our Growth Opportunities  Data Center  Diversified

Industrials  34  INVESTOR DAY 2026

Data CenterMarket-Leading Protection from Grid to Chip  Server / Storage /

Networking  F  Power Distribution Unit (PDU)  Remote Power Panel (RPP)  Rack PDU  IT load / IT gear power-only  Sidecar (1 MW+)  G  PSU shelf  HVDC bus (±400 / 800 VDC)  DC PDU  Low Voltage Switchgear  Automatic Transfer Switch (ATS)  Motor

Control Center (MCC)  Power-factor correction  Harmonic filtering  Medium Voltage Switchgear  Main power distribution  Feeder / branch  MV / LV transformer  Backup Power / Generator  Engine system  Fuel and exhaust system  Control and

monitoring  Cooling and lubrication  Onsite Power  Battery energy storage system  Renewable energy  Thermal Management  I  HVAC systems  Liquid cooling  Immersion cooling  UPS  H  High-power battery systems  Power Factor Correction (PFC)  High

wattage power supplies  Power Distribution Units (PDUs)  Power Busway / Cable  E  Feeder / riser busway  Busways  Tap-off boxes  Monitoring and sensing  Gray Space: Power to the Building  White Space: Power Inside the

Building  D  C  A  B  A  B  D  C  H  H  E  F  I  I  G  High Growth Opportunity

Data CenterHigher Power Demands Accelerate Growth Opportunity  $6T  DATA CENTER

INFRASTRUCTURE INVESTMENT(2025 – 2030)1  >15% CAGR  DATA CENTERPOWER USAGE(2025 – 2030)1  …Leading to High-Voltage Opportunities for Littelfuse  Capabilities across the power spectrum with system-level understanding of customers’

needs  Leading high-voltage protection partner to customers across the data center ecosystem  2x – 4x Content Upliftas market transitions to high-voltage architectures  25% – 30%+ CAGR  Estimated data center revenue growth through

2030  Significant Data Center Infrastructure Investment  …and Increased Power Usage Driving High-Voltage Architecture   Expertise in High Voltage Protection Creates Unique Right to Win  1 Company estimate.  High Growth Opportunity

Customer Success StoryProviding Data Center Solutions from Grid to

Chip  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  Leading hyperscaler requires more advanced and comprehensive protection solutions as their architecture evolves from low to high voltage  Enabled various eco-system partners on infrastructure,

rack, and board level solutions  Utilized our full portfolio of capabilities including passives, protection, power, and high-voltage industrial fuses   Brought value through reliability, performance, systems level support, and agency insights

Leveraged current partnership to co-create future solutions to enable continued architecture evolution  Customer Value  Littelfuse Value  Enabling Best-in-Class Performance, Reliability, and Safety  Sold 20+ LFUS Solutions Across Various

Applications  Anticipated Revenue +3x Over 5-Year Period  High Growth Opportunity

Diversified IndustrialsTrusted Brand with Strong Franchise Value  Market

Leadership Driving Best-in-Class Growth and Profitability   Trusted brand and technology solution provider for the safe and efficient transfer of electrical energy  Direct sales to accelerate growth in key focus areas including Aerospace &

Defense and Medical  Leveraging key, longstanding distribution partnerships to service diverse, broad base of customers  Market leader serving >50,000 end customers  Highly profitable franchise with strong cash contribution

Diversified Industrials – Aerospace & Defense (A&D)Capitalizing on

Significant A&D Growth Opportunity   +15%  ESTIMATED AEROSPACE & DEFENSE SAM CAGR (2025 – 2030)  Key Drivers of Market Growth  Increasing Defense Budget  Commercialization of Space  Air Travel Recovery  Significant Opportunity to Expand

Market Share through Targeted Investments  1 Company estimate.  1  Our Opportunity  Long history ofmission-critical technology capabilities  Leveraging ongoing market evolution   Higher voltageand power  Focused key account management +

targeted inorganic expansion  High Growth Opportunity

Customer Success StoryMission-Critical Solutions for Commercial Space

Innovator  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  Leading commercial space customer has evolved beyond traditional rocket manufacturer into a fully integrated space infrastructure platform operating across A&D market  Established

preferred supplier status through initial engagement in circuit protection  Leveraged protection, power semiconductors, and electromechanical technology capabilities to expand share  Strengthened position as strategic, multi-product solutions

partner through customization  Enabled recurring design wins with long product lifecycles  Customer Value  Littelfuse Value  Solution Solved for High Reliability, High Voltage Power Complexity  Timely Delivery of Optimized Protection and Power

Solutions for Next-Gen Space Systems  Expanded Revenue +5x Over 5-Year Period  Broadened ODM Design Partner Relationships to Enhance Market Opportunity  High Growth Opportunity

Key Takeaways  41  Capitalizing on megatrends in electrification, driven by

outsized growth from Data Centers and Aerospace & Defense  1  Delivering differentiated, high-value solutions to solve more complex customer challenges  2  Expanding go-to-market model with increased emphasis on our key customers to grow

share in new technology platforms  3  INVESTOR DAY 2026

Break  ~15 Minutes

Moving the WorldForward in Transportation and Logistics (T&L)  SVP & GM,

T&L Market  David Ruppel

Key Messages  Optimizing our go-to-market approach to be more effective,

selective, and proactive with leading customers  1  Enhancing and diversifying our market position through early, deep, and technical partnerships with leading OEMs to drive above market growth  2  Sharpening focus on megatrends and operational

excellence to enhance long-term profitable growth  3

Transportation & Logistics Market Snapshot  KEY HIGHLIGHTS  T&L END

MARKETS AS A % OF TOTAL 2025 REVENUE  Passenger Vehicle  OEMs and Tier 1 Suppliers  Global Exposure - North America, Europe, and China  Commercial Vehicle  HD and MD Trucking  Material Handling, Construction and Ag Equipment  Recreational

Vehicles and Powersports  Warehouse Automation and Robotics  EXAMPLES OF MARKET-LEADING CUSTOMERS  ~$700M  2025 T&L Revenue  Optimizing T&L Customer Base  Leading: 27% • Emerging: 40% • Broad: 33%  (% of 2025 T&L

Revenue)  9%  21%  7%  17%  9%  18%  19%

Positioned to Diversify and Grow in Expansive Addressable Market  ~1%Global

Vehicle Production Growth Rate1(2025 – 2030)  +Mid-Single DigitsLFUS Growth Rate1 (2025 – 2030)  1 Company estimate.  2025   2030   Serviceable Addressable Market1

Our Right to Win – T&L Sustainable Competitive Advantages  Long history of

co-innovation with leading global Transportation customers   Operational excellence mindset driving enhanced focus on commercial vehicle opportunities with market leading customers  Comprehensive and market leading low-, medium-, and

high-voltage capabilities to serve evolving customer needs   System-level architecture approach to evolving applications such as BMS, battery disconnect, connectivity, and HMI  Customizable and scalable solutions for multi-tech circuit

protection and modular power distribution  Global footprint and scale with best-in-class testing and local-for-local manufacturing  Customer Partnerships  Collaborative Innovation  Scalable Portfolio

Capitalizing on Our Growth Opportunities  Electrification and Functional Safety

Trends  Go-to-Market & Operational Mindset Optimization  48  INVESTOR DAY 2026

Unlocking Outgrowth Opportunities throughGlobal Electrification and Functional

Safety Evolutions  Background  Est. +1% Global Production Rate1  Electrification Evolution: Global Transportation evolution continues despite slowing EV growth rates  Functional Safety Adoption: Higher voltage, ADAS, and autonomous adoption

make functional safety critical to ensuring system reliability  Customers increasingly reliant on proven suppliers with comprehensive capabilities, flexible solutions, and global scale  Comprehensive Solutions, Technical Expertise, and Global

Scale to Enable Ongoing T&L Evolutions  Our Opportunity  Enabling electrification growth opportunities at scale through portfolio of market-leading 12V to medium- and high-voltage systems  Leveraging deep customer relationships to

co-develop and design next-gen solutions with industry-leading functional safety features  Re-deploying engineering resources through operational mindset to focus on systems that support long-term growth and profitability

enhancements  +Mid-Single-Digits Outgrowth  ADAS = Automated Driver Assistance System. 1 Company estimate.

Customer Success StorySolving for Safety Challenges with Global Automotive Leader

Global automotive customer identified specific challenges across EV models:  Battery safety  Packaging  Launch timing  Designed and implemented differentiated multi-technology circuit protection modules  Drove superior performance within

customer packaging and timing constraints  Provided ultra-fast circuit protection that enabled a differentiated, higher level of functional safety  +20X Dollar Content / Unit Compared to Traditional ICE Design  Opened Door to Further Tech

Engagements Across Our Portfolio  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  Solved Electrificationand Functional Safety Challenges to Enable Accelerated Launch   Customer Value  Littelfuse Value

Optimization Mindset to Enhance Our Long-Term Profitable Growth  Maximizing

Returns and Driving Market Outperformance  Pivoting Portfolio Toward Highest PotentialCustomers and Applications  Sharpened Focus  Right customers, applications, and opportunities  Driving to Scale  Opportunity funnel target shifted to driving

more meaningful value with leading OEMs  Reducing Complexity  Redeploying resources for larger, scalable, and leverageable opportunities   Low  High  Customer Volume and Revenue Potential  Prioritizeand Grow  Efficiency and Scale  Reducing

Complexity

Customer Success StoryDriving Significant Momentum with Commercial Vehicle Market

Leader  RESULTS  OUR UNIQUE SOLUTION  BACKGROUND  Accelerated Platform Development and Launch  Supply Chain Simplification and Inventory Reduction  Architected an optimized system solution for an accessory control module  Reduced development

costs and time-to-market  Leveraged CAN switching platform with Littelfuse multi-technology capabilities  Leading commercial vehicle customer required scaled solution to growing complexity of multiple vehicle platforms and problems associated

with configuring and powering connected accessories  Customer Value  Littelfuse Value  Significant Potential Annual Revenue with Multi-Year Contribution  +4x Content Opportunity  Driving Further Scaled Opportunities  CAN = Controller Area

Network.

Key Takeaways  53  Optimizing our go-to-market approach to be more effective,

selective, and proactive with leading customers  1  Enhancing and diversifying our market position through early, deep, and technical partnerships with leading OEMs to drive above market growth  2  Sharpening focus on megatrends and operational

excellence to enhance long-term profitable growth  3  INVESTOR DAY 2026

Accelerating Long-Term Growth through Semiconductor Innovation  SVP & GM,

Semiconductor Products  Dr. Karim Hamed

Key Messages  Leveraging our well aligned Semiconductor products to enable growth

across key focus end markets  1  Enhancing our portfolio by delivering solutions that complement Littelfuse’s broader technologies and capabilities  2  Driving long-term growth and profitability improvement through our Semiconductor products

business  3

Overvoltage  Protects against too much voltage, suppressing surgesand

spikes  Advanced Protection & Power Solutions  Provides smart, integrated control by detecting, responding, and managing faults in real time  High-Power Stacks and Full Protection Modules  TVS and ESD Diodes  Overcurrent  Protects against

too much current, stopping overheating and damage  Solid State Protection and Power Modules for Breakers  Semiconductor Products Business Snapshot  1 Semiconductor revenue is embedded within EII, CCDI, and T&L end markets.  KEY ENABLER OF

OUR GROWTH STRATEGY   EXAMPLES OF MARKET-LEADING CUSTOMERS  Serving 40,000+ Customers Across Our Network  2025 REVENUE BY PRODUCT  Power  50%  Protection  50%  ~$670M1  Enhancing Growth Across Our End Markets  EII  While Strengthening Long-Term

Positioning in HGOs  CCDI  T&L  BROAD-BASED TECHNOLOGY EXPERTISE

Leveraging Technology Transitions in High-Growth Opportunities to Outpace Market

Growth  Large, Attractive SAM  Capitalizing on High-Growth Opportunities  Grid & Utility Infrastructure  Data Center  Diversified Industrials – Aerospace & Defense  Protection + Power Semi  Double-Digits % CAGR1   (2025 –

2030)  ~$6B  20301  1 Company estimate.

New, Focused Semiconductor StrategyPositioned to Deliver Consistent, Profitable

Growth  Enabling Portfolio that Enhances Littelfuse Positioning Across End Markets  PROTECTION  Market leader poised for continued growth  SAM expansion via innovation and new market penetration  Strong profitability and cash

flow  POWER  Focused strategy to deliver sustainable, long-term profitable growth  Leveraging core competencies to drive growth in high-value applications  Manufacturing optimization to be a key driver of profitability improvement  DELIVERING

LEADING SOLUTIONS ACROSS PROTECTION AND POWER  +

Protection Semiconductors Maintaining and Expanding Leading Position through

Innovation  Accelerating the Next Phase of Growth and Margin Expansion  1 Company estimate (2025 – 2030 CAGR).  Building on Strong Foundation  Positioned as a market leader with a long track record of success  Delivering >10% 5-year CAGR1

and margins above corporate average  Looking Ahead: Key Priorities  Expand core end market positions benefiting from secular growth trends  Accelerate penetration in new end markets where we have a significant right-to-win  Strategically deploy

R&D to higher-value, higher-ASP solutions (5x – 10x)

Customer Success StorySolving High-Value Protection Challenges through Core

Competencies  RESULTS  OUR UNIQUE PROTECTION PLATFORM  CUSTOMER PROBLEM  High-Power, Software Configurable,Solid-State Protection Module  Scalable Across Growth End Markets  HVDC enables higher system efficiency  Risk of catastrophicarc flash

events  Requires reliable, advanced protection solutions with electronic reset capability  Customer Value  Littelfuse Value  Integrates 5X Functions  Reduces Cost of Ownership  Higher Value Capture

Power SemiconductorsExecuting on a More Focused, Customer-Centric

Strategy  Driving Accelerating Long-Term Growth and Enhanced Profitability  Pivoting Portfolio Toward High-Value Applications  Target Outcomes  Sharpening Our Growth Focus  Focusing on areas where we have a strong right to win, market share,

and an attractive SAM  Rationalizing Our Portfolio  Exiting areas of low value  Optimizing Our Manufacturing  Manufacturing to support a more focused product strategy in highest growth, high-power applications  More reliable partner for our

customers  1  Sustained long-term revenue growth  2  Meaningful margin expansion by 2030  3  Low  High  VALUE  Investto Grow

Customer Success StorySolving High-Value Power Challenges through Core

Competencies  RESULTS  OUR UNIQUE POWER PLATFORM  CUSTOMER PROBLEM  Deployed High-Power Stack with Integrated Cooling Architecture  Seamless power transfer between UPS systems and backup power sources  Provides compact, high-power-density

design while maximizing system reliability  STS = Static Transfer Switch. UPS = Uninterruptable Power Supply.  Data centers require uninterrupted power toIT racks  STS detects faults and instantly switches to backup power  Requires a reliable

andfast power solution to enable seamless switching     Customer Value  Littelfuse Value  Differentiated Tech Solution  +$400M Opportunity inHigh-Power Stacks  Scalable Solution Across Broader Customer Network

Key Takeaways  63  INVESTOR DAY 2026  Leveraging our well aligned Semiconductor

products to enable growth across key focus end markets  1  Enhancing our portfolio by delivering solutions that complement Littelfuse’s broader technologies and capabilities  2  Driving long-term growth and profitability improvement through our

Semiconductor products business  3

EVP & CFO  Abhi Khandelwal  Delivering More Resilient Growth and Scaling

Operational Excellence to Drive Strong Shareholder Value

Key Messages  Enhancing organic growth opportunities in large and expanding

markets, augmented by strategic acquisitions  1  Accelerating shareholder value creation through disciplined capital allocation  2  3  Delivering a more stable, less cyclical earnings profile and greater through-cycle resiliency  4  Elevating

operational performance by combining a well-defined operational playbook with renewed operational rigor to drive improved profit margins

2025 Revenue Profile – Three Strong Segments Serving Diverse and Growing Set of

End Markets  Reporting  Segment  Product based segments serving diverse end markets  Complementary capabilities enhanced by go-to-market shift  Meaningful content and outgrowth opportunities across segments  Broad exposure to end markets poised

to benefit from secular electrification megatrend  Diversification drives enhanced long-term growth stability  Next-gen technology advancements across end markets  21%  9%  17%  18%  Transportation  Electronics  Industrial  Energy

andIndustrialInfrastructure(EII)  Computing,Communications& DiversifiedIndustrials (CCDI)  Transportation & Logistics(T&L)

=  +7% – 9% Organic Revenue CAGR  Above-Market Core Growth  Outsized HGO

Growth  24% – 26%Adj. EBITDA Margin  Scale and Leverage  Operational Excellence, Product Rationalization  +6% – 8%Inorganic Revenue CAGR  Strategic M&A  Supported by Strong Cash Generation  >$25.00 EPSHigh-Teens EPS CAGR  Best-in-Class

Performance  Mid-Teens ROIC  Littelfuse Value Creation Playbook (2025 – 2030)  A Stronger, More Resilient Growth and Profitability Story  Organic Growth  Margin Expansion  Inorganic Growth  Value Creation

Poised to Drive Sustainable Growth Driven by Organic Execution and Enhanced by

Strategic M&A  Core  Growing Above-MarketAcross Segments  Electronics  Transportation  Industrial  HGOs  Sharpened Focus on HGOs Across Markets  EII: Grid & Utility Infrastructure  CCDI: Data Center and Aerospace &

Defense  Strategic M&A  Executing Strategic and Disciplined Acquisitions in Targeted Areas  Expands solution capabilities and technology positioning  Enhances market exposure and expands our serviceable addressable market  +7% – 9%ORGANIC

GROWTH  +6% – 8%INORGANIC GROWTH  HGOs = High-Growth Opportunities.

Leverage areas of best-in-class operating practices across global footprint  Drive

continuous portfolio rationalization to enhance long-term profitability  Deploy capital to enhance productivity via   AI and footprint optimization  Our Focus on Operational Excellence Expected to Enhance Profitability as We Scale  Deployed

Operational and Financial Metrics to Measure and Drive Long-Term Enhancements  TOP PRIORITIES  EXECUTION HIGHLIGHTS AND OPPORTUNITIES  Transportation segment initiatives driving structural margin enhancements  Identified semiconductor

rationalization opportunities to enhance long-term margin profile  Leveraging AI to enhance productivity  Acquisition execution a key focus point  Basler exceeding expectations  1  2  3

Generating Strong FCF to Support Growth  Maintaining 100%+ FCF conversion target

(2021 – 2025 average FCF conversion: 100%+)  A proven history of strong cash generation   Focusing on driving long-term cash returns of strategic investments and M&A  Delivering FCF enhancements through working capital improvements

Positioned to Deliver $600M+ Annual FCF by 2030  HIGHLIGHTS  See Appendix for reconciliation of non-GAAP figures.

Consistent, Strong Balance Sheet ManagementWhile Delivering Acquisitive

Growth  Flexible Capital Structure and History of Balance Sheet Consistency  Capital Summary and Financial Highlights ($M, As of 3/28/2026)  Cash & Cash Equivalents  $482  Total Assets  $3,856  Debt  $635  Total Stockholders’

Equity  $2,514  Consolidated Net Leverage Ratio  1.0x  Available Credit Under Revolving Credit Facility  $599  Net Debt to EBITDA  Track Record of Maintaining Leverage withinTargeted Range While Driving M&A Model  2.5x  1.0x  Target

Long-Term Range

Disciplined and Balanced Capital Deployment Strategy  FUTURE PRIORITIES  Organic

Investments  Long-term revenue growth  Enhanced productivity  Targeting 3% – 4% CapEx as a % of Sales  Strategic Acquisitions  Strengthens technology positioning  Enhances market exposure  Return Capital to Shareholders  Consistent dividend

payout  Opportunistic share repurchases  1 Company estimate.

Our Approach to Strategic M&A – Sharpened Focus on Enhanced Growth,

Profitability, and Returns  FINANCIAL FILTERS  Enhances Long-Term Organic Growth  (Targeted 7% – 9%)  Expands Margins and Strengthens Long-Term Profitability  Focuses on   Cash Returns  (Double-Digit ROIC)  Strengthen Solution

Capabilities  Expand solutions for customers’ next-gen architectures  Enhance technology leadership positioning in safe and efficient electrical energy transfer  Bolster partnershipswith market leaders  Enhance Market Exposure  Amplify exposure

to HGOs: Grid & Utility Infrastructure, Data Center, and A&D  Expand to adjacent market or regional opportunities  Drive addressable market expansion and diversification  FOCUS ON ACCELERATING HIGH-GROWTH OPPORTUNITIES

HIGHLIGHTS AND UPDATE  M&A Spotlight – Basler Acquisition  Capital

Deployed  ~$350M  2026E Revenue Contribution  $130M – $135M  Strategic and Financial Rationale  Bolsters Technology Differentiation  Diversifies End Market Exposure  Enhances Long-Term Organic Growth  Expands Margins and Strengthens LT

Profitability  Focuses on Cash Returns  Enhances high-growth industrial exposure  Leverages longstanding customer relationships with market leaders  Q1 performance exceeded expectations  Drives strong 2026E financial impact to our

portfolio  Revenue: $130M – $135M  Adj. EBITDA Margin: High-Teens  Adj. EPS Accretion: $0.15+  Previous Est. Accretion: $0.10 – $0.15  Dec 2025

Our 2030 Ambition  $4.5BRevenue   $1.1B  Adj. EBITDA  $600M  Free Cash Flow  Note:

Company estimates for 2030.

Annual Revenue Growth Bridge ($B)  $2.4B  +8% – 10%  ~$4.5B  Core market growth

driven by content expansion across segments and go-to-market contribution  HGOs led by Grid & Utility Infrastructure, Data Center, and Aerospace & Defense  Product rationalization est. (-1% – 2%) annually  Inorganic driven by strategic

M&A focus  Segment Organic Growth Assumptions:  Electronics: High-Single Digits  Transportation: Mid-Single Digits  Industrial: Double Digits  DRIVERS AND ASSUMPTIONS  (-1% – 2%)  +6% – 8%  +7% – 9% Organic  Note: see Appendix for

reconciliation of non-GAAP figures. 1 Company estimate.  1

Adjusted EBITDA Bridge ($B)Based on Revenue Growth and Adj. EBITDA Margin Outlook

Midpoints  $X.x  30% – 35%  Conversion  ~$1.1B  Core + HGO conversion in-line with historic levels (30% – 35%)  Optimization to drive structural profitability enhancements; ~$50M identified  Strategic M&A focused on driving double-digit

ROIC  Estimated margin expansion across Electronics, Transportation, and Industrial segments  2030 Target: 24% – 26% Adj. EBITDA Margin1  DRIVERS AND ASSUMPTIONS  $0.5B  ~$50M  ~$200M  ~$400M  Note: see Appendix for reconciliation of non-GAAP

figures. 1 Company estimate.  1

Enhancing organic growth opportunities in large and expanding markets, augmented

by targeted acquisitions  1  Enhancing shareholder value creation through disciplined capital allocation  2  Elevating operational performance by combining a well-defined operational playbook with renewed operational rigor to drive improved

profit margins  3  Delivering a more stable, less cyclical earnings profile and greater through-cycle resiliency  4  Key Takeaways  78  INVESTOR DAY 2026

President & CEO  Greg Henderson  Closing Remarks: Leader in Safe and Efficient

Electrical Energy Transfer

Right Strategy to Capitalize on Our Opportunities  Unparalleled Capabilities to

Enable Transformation and Enhance Growth  Transformational Shift in Electrification of Our Markets  Why We Are Excited for the Future   Driving Value for Stakeholders

Q&A  All Presenters

Appendix  Non-GAAP to GAAP Reconciliation Tables

Supplemental Financial Information  Non-GAAP EPS

reconciliation  Q4-25  Q4-24  YTD-25  YTD-24  GAAP diluted EPS  $ (9.72)  $ (2.09)  $ (2.89)  $ 4.00   EPS impact of Non-GAAP adjustments (below)   12.41    3.61    13.57    3.97   Adjusted diluted EPS  $ 2.69   $ 1.53   $ 10.68   $ 7.97

Non-GAAP adjustments – (income) / expense (in millions)  Q4-25  Q4-24  YTD-25  YTD-24  Acquisition-related and integration costs (a)  $ 2.4   $ 2.4   $ 5.4   $ 5.1   Purchase accounting inventory adjustments (b)   1.1    —    0.6    —

Restructuring, impairment and other charges (c)   306.9    98.1    320.1    108.4   Gain on sale of fixed assets (d)   —    —    —    (1.5)  Loss on sale of the Marine business (e)   —    —    0.3    —   Non-GAAP adjustments to operating

(loss) income   310.4    100.5    326.4    112.0   Other expense (income), net (f)   0.6    1.6    0.6    1.3   Non-operating foreign exchange loss (gain)   1.1    (13.5)   16.6    (9.2)  Non-GAAP adjustments to (loss) income before income

taxes   312.2    88.5    343.6    104.1   Income taxes (g)   2.4    (1.5)   4.6    4.7   Non-GAAP adjustments to net (loss) income   309.8    90.0    339.0    99.4   Total EPS impact  $ 12.41   $ 3.61   $ 13.57   $ 3.97   Note: Total will not

always foot due to rounding.  (a) reflected in selling, general and administrative expenses (“SG&A”).  (b) reflected in cost of sales.  (c) reflected in restructuring, impairment and other charges. In the fourth quarter of 2025, the Company

recorded a $301.2 million non-cash goodwill impairment charge related to the Electronics-Semiconductor reporting unit within the Electronics segment. In addition, during the fourth quarter of 2025, the Company recognized a $0.5 million and $0.4

million impairment charges related to certain machinery and equipment in the commercial vehicle business within the Transportation segment and the electronics products business within the Electronics segment, respectively. In the fourth quarter

of 2024, the Company recorded $92.6 million of non-cash impairment charges, which included $47.8 million for the impairment of intangible assets primarily related to certain acquired customer relationships, developed technology, and tradename

in the Industrial controls and sensors reporting unit within the Industrial segment, and $36.1 million and $8.6 million non-cash goodwill impairment charge associated with the Industrial controls and sensors reporting unit within the Industrial

segment and the Automotive sensors reporting unit within the Transportation segment, respectively. In addition, during the first quarter of 2024, the Company recognized a $0.9 million impairment related to certain machinery and equipment in the

commercial vehicle business within the Transportation segment.  (d) 2024 amount reflected a gain of $0.5 million recorded for the sale of a land use right within the Electronics segment and a gain of $1.0 million for the sale of two buildings

within the Transportation segment.  (e) 2025 amount reflected $0.3 million loss related to the sale of the Marine business within the Transportation segment.  (f) 2025 included $0.6 million increase in coal mining reserves. 2024 included $1.8

million increase in coal mining reserves, partially offset by a reversal of $0.5 million for an asset retirement obligation charge related the disposal of a business in 2019.   (g) reflected the tax impact associated with the non-GAAP

adjustments.

Supplemental Financial Information Cont’d  Adjusted operating margin / Adjusted

EBITDA reconciliation (in millions)  Q4-25  Q4-24  YTD-25  YTD-24  Net (loss) income  $ (242.1)  $ (51.8)   $ (71.7)   $ 100.2   Add:  Income taxes   12.9    9.1    75.3    51.7   Interest expense   8.3    9.4    34.3    38.7   Foreign exchange

loss (gain)   1.1    (13.5)    16.6    (9.2)   Other income, net   (3.0)    (2.7)    (17.0)    (22.6)   GAAP operating (loss) income  $ (222.8)  $ (49.5)   $ 37.5   $ 158.8   Non-GAAP adjustments to operating (loss) income   310.4    100.5

326.4    112.0   Adjusted operating income  $ 87.6   $ 51.0   $ 363.9   $ 270.8   Amortization of intangibles   15.5    14.7    59.8    62.1   Depreciation expenses   18.5    17.3    74.9    68.3   Adjusted EBITDA  $ 121.6   $ 83.0   $ 498.6

$ 401.2   Net sales  $ 593.9   $ 529.5   $ 2,386.3   $ 2,190.8   Net (loss) income as a percentage of net sales   (40.8)%   (9.8)%   (3.0)%   4.6 %  Operating margin   (37.5)%   (9.3)%   1.6%   7.2%  Adjusted operating margin   14.7%   9.6%

15.2%   12.4%  Adjusted EBITDA margin   20.5%   15.7%   20.9%   18.3%

Supplemental Financial Information Cont’d  Adjusted EBITDA by Segment (in

millions)  YTD-25  YTD-24  Electronics  Transportation  Industrial  Electronics  Transportation  Industrial  GAAP operating income  $ 220.1   $ 84.8   $ 59.0   $ 169.9   $ 58.6   $ 42.3   Add:  Add back amortization   40.4    13.5    5.9

39.4    13.5    9.2   Add back depreciation   47.6    21.2    6.1    40.4    22.1    5.8   Adjusted EBITDA  $ 308.1   $ 119.5   $ 71.0   $ 249.7   $ 94.2   $ 57.3   Adjusted EBITDA Margin   22.9%   17.7%   19.5 %   21.0%   14.0%   17.3

%  YTD-25  YTD-24  Net sales (in thousands)  Electronics  Transportation  Industrial  Electronics  Transportation  Industrial  Electronics – Semiconductor  $ 669,579   $ —   $ —   $ 615,372   $ —   $ —   Electronics – Passive Products and

Sensors   675,943    —    —    571,401    —    —   Commercial Vehicle Products   —    320,545    —    —    320,549    —   Passenger Car Products   —    293,641    —    —    278,332    —   Automotive Sensors   —    62,191    —    —    73,553

—   Industrial Products   —    —    364,395    —    —    331,561   Total  $ 1,345,522  $ 676,377   $ 364,395   $ 1,186,77   $ 672,434   $ 331,561

Supplemental Financial Information Cont’d  Income tax

reconciliation  Q4-25  Q4-24  YTD-25  YTD-24  Income taxes  $ 12.9   $ 9.1   $ 75.3   $ 51.7   Effective rate   (5.6)%   (21.3)%   2,088.2%   34.0%  Non-GAAP adjustments - income taxes   2.4    (1.5)    4.6    4.7   Adjusted income taxes  $

15.3   $ 7.6   $ 79.9   $ 56.4   Adjusted effective rate   18.4%   16.6%   23.0%   22.0%  Free cash flow reconciliation  Q4-25  Q4-24  YTD-25  YTD-24  Net cash provided by operating activities  $ 138.7   $ 160.6   $ 433.8   $ 367.6   Less:

Purchases of property, plant and equipment   (18.9)    (25.8)    (67.6)    (75.9)   Free cash flow  $ 119.7   $ 134.8   $ 366.1   $ 291.7   Free cash flow conversion  Q4-25  Q4-24  YTD-25  YTD-24  Net (loss) income  $ (242.1)  $ (51.8)   $

(71.7)   $ 100.2   Free cash flow   119.7    134.8    366.1    291.7   Free cash flow conversion   (49.4)%   (260.2)%   (510.6)%   291.1%

Supplemental Financial Information Cont’d  Consolidated Total Debt (in

millions)  As of March 28, 2026  Consolidated total debt  $ 631.5   Unamortized debt issuance costs   3.5   Finance lease liability   0.2   Consolidated funded indebtedness   635.2   Cash held in U.S. (up to $400 million)  67.6  Net debt  $

567.6   Consolidated EBITDA (in millions)  Twelve Months Ended March 28, 2026  Net Loss  $ (40.3)  Interest expense   32.4   Income taxes   80.5   Depreciation expense   75.4   Amortization expense   62.0   Non-cash additions:  Stock-based

compensation expense   28.1   Purchase accounting inventory step-up charge   6.4   Unrealized loss on investments   2.1   Impairment charges   301.9   Other   34.1   Consolidated EBITDA (1)  $ 582.6   Consolidated Net Leverage Ratio (as defined

in the Credit Agreement) *  1.0x  * Our Credit Agreement and Private Placement Note with maturities ranging from 2027 to 2031, contain financial ratio covenants providing that if, as of the last day of each fiscal quarter, the Consolidated Net

Leverage ratio at such time for the then most recently concluded period of four consecutive fiscal quarters of the Company exceeds 3.50:1.00, an Event of Default (as defined in the Credit Agreement and Private Placement Senior Notes) is

triggered.  The Credit Agreement were amended in Q1 2026 and now allow to add restructuring charges and business optimization expenses in addition to the Prior credit agreement.  (1) Represents Consolidated EBITDA as defined in our Credit

Agreement and Private Placement Senior Notes and is calculated using the most recently concluded period of four consecutive quarters.

Supplemental Financial Information Cont’d  Adjusted operating margin / Adjusted

EBITDA reconciliation (in millions)  YTD-25  Net loss  $ (71.7)   Add:  Income taxes   75.3   Interest expense   34.3   Foreign exchange loss   16.6   Other income, net   (17.0)   GAAP operating income  $ 37.5   Non-GAAP adjustments to

operating income   326.4   Adjusted operating income  $ 363.9   Amortization of intangibles   59.8   Depreciation expense   74.9   Adjusted EBITDA  $ 498.6   Net sales  $ 2,386.3   Net loss as a percentage of net sales   (3.0) %  Operating

margin   1.6 %  Adjusted operating margin   15.2 %  Adjusted EBITDA margin   20.9 %

Supplemental Financial Information Cont’d  Free cash flow

reconciliation  YTD-2021  YTD-2022  YTD-2023  YTD-2024  YTD-2025  Net cash provided by operating activities  $ 373.3   $ 419.7   $ 457.4   $ 367.6   $ 433.8   Less: Purchases of property, plant and equipment   (90.6)    (104.3)    (86.2)

(75.9)    (67.6)   Free cash flow  $ 282.7   $ 315.4   $ 371.2   $ 291.7   $ 366.1   Free cash flow conversion  YTD-2021  YTD-2022  YTD-2023  YTD-2024  YTD-2025  Accumulated 5 years  Net income (loss)  $ 283.8   $ 373.3   $ 259.5   $ 100.2   $

(71.7)   $ 945.1   Free cash flow   282.7    315.4    371.2    291.7    366.1    1,627.1   Free cash flow conversion   99.6 %   84.5 %   143.0 %   291.1 %   (510.6) %   172.2 %

* Our Credit Agreement and Private Placement Note with maturities ranging from

2025 to 2032, contain financial ratio covenants providing that if, as of the last day of each fiscal quarter, the Consolidated Net Leverage ratio at such time for the then most recently concluded period of four consecutive fiscal quarters of

the Company exceeds 3.50:1.00, an Event of Default (as defined in the Credit Agreement and Private Placement Senior Notes) is triggered.  The Credit Agreement and Private Placement Senior Notes were amended in Q2 2022 and now allow for the

addition of acquisition and integration costs up to 15% of Consolidated EBITDA and the netting of up to $400M of Available Cash (Cash held by US Subsidiaries).   (1) Represents Consolidated EBITDA as defined in our Credit Agreement and Private

Placement Senior Notes and is calculated using the most recently concluded period of four consecutive quarters.  Supplemental Financial Information Cont’d  Consolidated Total Debt  As of December 27, 2025  Consolidated Total Debt  $

802.6  Unamortized debt issuance costs   1.8  Finance lease liability   0.2  Consolidated funded indebtedness  $ 804.6  Cash held in U.S. (up to $400 million)   144.3  Net debt  $ 660.3  (in millions)Consolidated EBITDA  Twelve Months

Ended  December 27, 2025  Net loss  $ (71.9)  Interest expense   34.3  Income taxes   75.3  Depreciation   74.9  Amortization   59.8  Non-cash additions:  Stock-based compensation expense   27.3  Purchase accounting inventory step-up charge

0.6  Unrealized loss on investments   3.6  Impairment charges   302.1  Other   38.5  Consolidated EBITDA (1)  $ 544.5  Consolidated Net Leverage Ratio (as defined in the Credit Agreement)*  1.2x

(1) As reported is based on Q4 and FY 2024 result published on January 28, 2025.

Actual is based on the final 10-K report.  * Our Credit Agreement and Private Placement Note with maturities ranging from 2024 to 2032, contain financial ratio covenants providing that if, as of the last day of each fiscal quarter, the

Consolidated Net Leverage ratio at such time for the then most recently concluded period of four consecutive fiscal quarters of the Company exceeds 3.50:1.00, an Event of Default (as defined in the Credit Agreement and Private Placement Senior

Notes) is triggered.  The Credit Agreement and Private Placement Senior Notes were amended in Q2 2022 and now allow for the addition of acquisition and integration costs up to 15% of Consolidated EBITDA and the netting of up to $400M of

Available Cash (Cash held by US Subsidiaries).   (2) Represents Consolidated EBITDA as defined in our Credit Agreement and Private Placement Senior Notes and is calculated using the most recently concluded period of four consecutive

quarters.  Supplemental Financial Information Cont’d  Consolidated Total Debt  As of December 28, 2024  Consolidated Total Debt  $ 856.1  Unamortized debt issuance costs   2.8  Finance lease liability   0.3  Consolidated funded indebtedness  $

859.2  Cash held in U.S. (up to $400 million)   302.2  Net debt  $ 557.0  (in millions)  Twelve Months Ended  December 28, 2024  Twelve Months Ended  December 28, 2024  Consolidated EBITDA  As Reported (1)  Actual (1)  Net Income  $ 112.8  $

100.0  Interest expense   38.7   38.7  Income taxes   51.7   51.7  Depreciation   68.3   68.3  Amortization   62.1   62.1  Non-cash additions:  Stock-based compensation expense   26.0   26.0  Unrealized loss on investments   (0.1)

(0.1)  Impairment charges   93.5   93.5  Other   3.7   3.7  Consolidated EBITDA (2)  $ 456.7  $ 443.9  Consolidated Net Leverage Ratio (as defined in the Credit Agreement)*  1.2x  1.3x

* Our Credit Agreement and Private Placement Note with maturities ranging from

2023 to 2032, contain financial ratio covenants providing that if, as of the last day of each fiscal quarter, the Consolidated Net Leverage ratio at such time for the then most recently concluded period of four consecutive fiscal quarters of

the Company exceeds 3.50:1.00, an Event of Default (as defined in the Credit Agreement and Private Placement Senior Notes) is triggered.  The Credit Agreement and Private Placement Senior Notes were amended in Q2 2022 and now allow for the

addition of acquisition and integration costs up to 15% of Consolidated EBITDA and the netting of up to $400M of Available Cash (Cash held by US Subsidiaries).   (1) Represents Consolidated EBITDA as defined in our Credit Agreement and Private

Placement Senior Notes and is calculated using the most recently concluded period of four consecutive quarters.  Supplemental Financial Information Cont’d  Consolidated Total Debt  As of December 30, 2023  Consolidated Total Debt  $

871.9  Unamortized debt issuance costs   3.8  Finance lease liability  $ 0.7  Consolidated funded indebtedness  $ 876.4  Cash held in U.S. (up to $400 million)  $ 178.6  Net debt  $ 697.8  (in millions)  Consolidated EBITDA  Twelve Months

Ended  December 30, 2023  Net Income  $ 259.4  Interest expense   39.9  Income taxes   69.1  Depreciation   71.6  Amortization   65.8  Non-cash additions:  Stock-based compensation expense   23.9  Unrealized loss on investments

0.3  Impairment charges   4.9  Other   13.4  Consolidated EBITDA (1)  $ 548.3  Consolidated Net Leverage Ratio (as defined in the Credit Agreement)*  1.3x

* Our Credit Agreement and Private Placement Note with maturities ranging from

2023 to 2032, contain financial ratio covenants providing that if, as of the last day of each fiscal quarter, the Consolidated Net Leverage ratio at such time for the then most recently concluded period of four consecutive fiscal quarters of

the Company exceeds 3.50:1.00, an Event of Default (as defined in the Credit Agreement and Private Placement Senior Notes) is triggered.  The Credit Agreement and Private Placement Senior Notes were amended in Q2 2022 and now allow for the

addition of acquisition and integration costs up to 15% of Consolidated EBITDA and the netting of up to $400M of Available Cash (Cash held by US Subsidiaries).   (1) Represents Consolidated EBITDA as defined in our Credit Agreement and Private

Placement Senior Notes and is calculated using the most recently concluded period of four consecutive quarters.  Supplemental Financial Information Cont’d  Consolidated Total Debt  As of December 31, 2022  Consolidated Total Debt  $

1,001.5  Unamortized debt issuance costs   4.8  Finance lease liability  $ 1.8  Consolidated funded indebtedness  $ 1,008.1  Cash held in U.S. (up to $400 million)  $ 110.6  Net debt  $ 897.5  (in millions)  Consolidated EBITDA  Twelve Months

Ended  December 31, 2022  Net Income  $ 373.3  Interest expense   26.2  Income taxes   69.7  Depreciation   65.0  Amortization   55.7  Non-cash additions:  Stock-based compensation expense   23.6  Purchase accounting inventory step-up charge

15.6  Unrealized loss on investments   14.0  Impairment charges   4.5  Other   81.9  Consolidated EBITDA (1)  $ 729.5  Consolidated Net Leverage Ratio (as defined in the Credit Agreement)*  1.2x

* Our Private Placement Senior Notes, with maturities ranging from 2022 to 2030,

contain a financial ratio covenant providing that if, as of the last day of each fiscal quarter, the ratio of Consolidated total gross debt at such time to Consolidated EBITDA for the then most recently concluded period of four consecutive

fiscal quarters of the Company exceeds 3.50:1.00, an Event of Default (as defined in the Private Placement Senior Notes) is triggered  (1) Represents Consolidated EBITDA as defined in our Private Placement Senior Notes and is calculated using

the most recently concluded period of four consecutive quarters.  Supplemental Financial Information Cont’d  Consolidated Total Debt  As of January 1, 2022  Consolidated total gross debt  $ 615.0  Unamortized debt issuance costs

(3.1)  Consolidated Total Debt  $ 611.9  (in millions)  Consolidated EBITDA (as defined in the Private Placement Senior Notes) (1)  Twelve Months Ended  January 1, 2022  Net Income  $ 283.8  Interest expense   18.5  Income taxes

57.2  Depreciation   55.9  Amortization   42.7  Non-cash additions (reductions):  Non-cash pension settlement charge   19.9  Stock-based compensation expense   19.6  Purchase accounting inventory step-up charge   8.4   Unrealized gain on

investments   (8.9)  Other   26.7  Consolidated EBITDA (as defined in the Private Placement Senior Notes) (1)  $ 523.8  Ratio of Consolidated total gross debt to Consolidated EBITDA (as defined in Private Placement Senior Notes)*  1.2x

Appendix  Speaker Bios

Dr. Henderson was appointed President and Chief Executive officer effective

February 10, 2025. From 2017 to 2024, Dr. Henderson served as the Senior Vice President of the Automotive & Energy, Communications, and Aerospace Group for Analog Devices, Inc. (NASDAQ: ADI), a semiconductor company specializing in data

conversion, signal processing and power management technology. Previously, he served as Vice President of the RF and Microwave Business for Analog Devices from 2014 to 2017, and as Vice President of the RF and Microwave Business for Hittite

Microwave Corporation until its acquisition by Analog Devices in 2014. Before joining Hittite, Dr. Henderson held various positions of increasing technical and leadership responsibility at Harris Corporation, Tyco Electronics, TriQuint

Semiconductor, and IBM (NYSE: IBM). Dr. Henderson holds a bachelor’s degree in electrical engineering from Texas Tech University and a Ph.D. in electrical engineering from the Georgia Institute of Technology.  GREG HENDERSONPresident and Chief

Executive Officer, Member of Board of Directors

Mr. Khandelwal joined Littelfuse in 2025 as Executive Vice President and Chief

Financial Officer. Prior to joining Littelfuse, he served as Senior Vice President and Chief Financial Officer of IDEX Corporation, an industrial design and manufacturing company, from 2023 to 2025. Prior to that, Mr. Khandelwal served as Chief

Financial Officer of Multi-Color Corporation, a manufacturer of printed labels for consumer goods, from 2022 to 2023, and as Senior Vice President and Chief Financial Officer of CIRCOR International, a pump & valve systems and custom

engineering & design company, from 2020 to 2021. From 2010 to 2020, Mr. Khandelwal held various finance roles at IDEX Corporation, including as Vice President of Finance Operations, Treasury and Financial Planning & Analysis.  ABHI

KHANDELWALExecutive Vice President and Chief Financial Officer

Mr. Kim joined Littelfuse in 2003 as Manager, Global Procurement. He then held

various positions of increasing responsibility at Littelfuse including Director, Global Procurement; Director, Electronics Product Management; Vice President, Asia Sales; Vice President, Global Sales from 2017 to 2019; and Vice President and

General Manager, Industrial Business from 2019 until assuming his current position in 2022.  PETER KIMSenior Vice President and General Manager, EII Market

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; Senior Vice President, Electronics Business Unit from 2011 until 2019; and Senior Vice

President and General Manager, Electronics and Industrial Business from 2019 until assuming his current position in 2022.  DEEPAK NAYARSenior Vice President and General Manager, CCDI Market

Mr. Ruppel joined Littelfuse in his current position in 2024. Prior to joining

Littelfuse, Mr. Ruppel served as President at IDEX Optical Technologies from 2021 to 2024, and previously served in leadership roles at Montevideo Technology, Inc., Herman Miller, Eaton and Cooper Industries.  DAVE RUPPELSenior Vice President

and General Manager, T&L Market

Dr. Hamed joined Littelfuse in 2025. Prior to joining, he was most recently at

Analog Devices where he served as Corporate Vice President, Industrial and Healthcare Business Group. Previously, he served as Vice President, Industrial Instrumentation Business Unit, and General Manager, Microwave Communications Group. Dr.

Hamed also served in various leadership and technical roles at Hittite Microwave Corporation, TriQuint Semiconductor, and Mimix Broadband. Dr Hamed received a PhD in Electrical & Computer Engineering from Queen’s University in

Canada.  KARIM HAMEDSenior Vice President and General Manager, Semiconductor Business

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