LFUS / Littelfuse, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Littelfuse names Dr. Karim Hamed Senior Vice President and General Manager, Semiconductor Business

EXHIBIT 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] Littelfuse names Dr. Karim Hamed Senior Vice President and General Manager, Semiconductor Business Chicago, August 7, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, today announced the appointment of Dr. Karim Hamed as Senior

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 7, 2025 (Date of earliest event reported) LITTELFUSE, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 7, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 28, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 30, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2025

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2025 Second Quarter 2025 Highlights: (Year-over-year comparisons unless otherwise noted) •Net sales of $613 million, +9.8%; organic growth contributed +6.2% •GAAP diluted earnings per share of $2.30, +26% •Adjusted diluted earnings per share of $2.85, +45% •GAAP Operati

Q2 2025 Earnings Release July 30, 2025 2Littelfuse, Inc. © 2025 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 se

q22025slide1 Q2 2025 Earnings Release July 30, 2025 2Littelfuse, Inc. © 2025 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 strong

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 6133 N River Road, Suite 500, Rosemont, IL 60018 (Address of princip

Littelfuse, Inc. Conflict Minerals Report for the Calendar Year Ended December 31, 2024.

EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Calendar Year Ended December 31, 2024 This Conflict Minerals Report (“Report”) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, “Littelfuse,” the “Company,” “we” or “our”) for the calendar year ended December 31, 2024, is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (“Rul

, 2025, File No. 000-20388, and incorporated herein by reference).

EXHIBIT 10.1 May 13, 2025 Dear Abhi, I am pleased to extend an offer for the position of Executive Vice President and Chief Financial Officer at Littelfuse. This role will report directly to Greg Henderson, President and CEO of Littelfuse. The following is a summary of the key provisions of our offer of employment. Position: Executive Vice President and Chief Financial Officer Principal Worksite:

Littelfuse Names Abhi Khandelwal Chief Financial Officer

EXHIBIT 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] Littelfuse Names Abhi Khandelwal Chief Financial Officer Chicago, May 27, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a leader in developing smart solutions that enable safe and efficient electrical energy transfer, today announced that Abhi Khandelwal has been appointed Executive Vice President and Chief Financial Off

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 27, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Number

Form Restricted Stock Unit Award Agreement (Tier II) under the Littelfuse/IXYS Corporation Long-Term Incentive Plan

EXHIBIT 10.7 LITTELFUSE/IXYS CORPORATION LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier II) Littelfuse, Inc. (the “Company”) hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Littelfuse/IXYS Corporation Long-Term Incentive Plan (previous known as IXYS Corporation 2016 Equity Incentive Plan), as amended from time-to-time (the “Plan”), a Restricted Stoc

Form of Restricted Stock Unit Award Agreement (Tier II) under the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan

EXHIBIT 10.4 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier II) Littelfuse, Inc. (the “Company”) hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units represe

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 29, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

Littelfuse, Inc. Long-Term Incentive Plan Subplan for Restricted Stock Units Granted to French Participants

EXHIBIT 10.8 LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN Subplan for Restricted Stock Units Granted to French Participants 1.Introduction (a)Littelfuse, Inc. (the “Corporation”) established the Littelfuse, Inc. Long-Term Incentive Plan (the “Plan”), which was originally adopted by the Corporation’s Board of Directors (the “Board”) on February 4, 2010 and approved by the Corporation’s stockholders on

Form of Restricted Stock Unit Award Agreement (Non-Employee Director) under the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan

EXHIBIT 10.5 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Non-Employee Director) The Board of Directors (the “Board”) of Littelfuse, Inc. (the “Company”), based on the recommendation of the Compensation Committee of the Board, hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Lon

Q1 2025 Earnings Release APRIL 29, 2025 2Littelfuse, Inc. © 2025 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 s

Q1 2025 Earnings Release APRIL 29, 2025 2Littelfuse, Inc. © 2025 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

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 29, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2025

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2025 First Quarter 2025 Highlights: (Year-over-year comparisons unless otherwise noted) •Net sales of $554 million, +3.5%; organic growth contributed +2.9% •GAAP diluted earnings per share of $1.75 •Adjusted diluted EPS of $2.19, +24% •Free cash flow of $43 million, +3%;

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 24, 2025 (Date of earliest event reported) LITTELFUSE, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 24, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

Form of Restricted Stock Unit Award Agreement (Tier I) under the Littelfuse/IXYS Corporation Long-Term Incentive Plan (filed as exhibit 10.3 to the Company’s Form 8-K filed April 28, 2025, File No. 000-20388, and incorporated herein by reference)

EXHIBIT 10.3 LITTELFUSE/IXYS CORPORATION LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier I) Littelfuse, Inc. (the “Company”) hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Littelfuse/IXYS Corporation Long-Term Incentive Plan (previous known as IXYS Corporation 2016 Equity Incentive Plan), as amended from time-to-time (the “Plan”), a Restricted Stock

Form of Restricted Stock Unit Award Agreement (Tier I) under the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan (filed as exhibit 10.1 to the Company’s Form 8-K filed April 28, 2025, File No. 000-20388, and incorporated herein by reference)

EXHIBIT 10.1 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier I) Littelfuse, Inc. (the “Company”) hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units represen

Form of Performance Share Award Agreement (Tier I) under the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan (filed as exhibit 10.2 to the Company’s Form 8-K filed April 28, 2025, File No. 000-20388, and incorporated herein by reference)

EXHIBIT 10.2 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN PERFORMANCE SHARE AWARD AGREEMENT (Tier I) Littelfuse, Inc. (the “Company”) hereby grants to /$ParticipantName$/ (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Performance Share Award (the “Award”) for units representing the

Letter Agreement between Littelfuse, Inc. and Meenal Sethna, dated April 8, 2025 (filed as exhibit 10.1 to the Company’s Form 8-K filed April 9, 2025, File No. 000-20388, and incorporated herein by reference).

Exhibit 10.1 April 8, 2025 Meenal Sethna c/o Littelfuse, Inc. 6133 N. River Road, Suite 500 Rosemont IL 60018 Dear Meenal: This letter agreement (this “Letter Agreement”) memorializes our recent discussions regarding the terms and conditions of your separation from service with Littelfuse, Inc. (the “Company”). Separation from Service You and the Company hereby mutually agree that you will separat

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): April 8, 2025 LITTELFUSE, INC.

Littelfuse Announces CFO Transition Plan

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] Littelfuse Announces CFO Transition Plan • Meenal Sethna to step down as CFO • Company commences formal CFO search Chicago, April 9, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a diversified industrial technology manufacturing company empowering a sustainable, connected, and safer world, today announced that Meenal Set

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ☒ Filed by the Registrant  ☐ Filed by a Party other than the Registrant Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ☒ D

Summary of Non-Employee Director Compensation.++

EXHIBIT 10.63 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2024 fiscal year, non-employee directors received an annual retainer of $95,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

Form of Off-Cycle Restricted Stock Unit Award Agreement.++

Exhibit 10.61 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN OFF-CYCLE RESTRICTED STOCK UNIT AWARD AGREEMENT Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units representing shares

United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 28, 2024 Or ☐ Transition Report Pur

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 28, 2024 Or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

Performance Share Award Agreement, dated February 10, 2025, by and between Littelfuse, Inc. and Greg

Exhibit 10.60 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN PERFORMANCE SHARE AWARD AGREEMENT Littelfuse, Inc. (the “Company”) hereby grants to Greg Henderson (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Performance Share Award (the “Award”) for units representing the right to rec

SUBSIDIARIES

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden C&K Aerospace France C&K Components (H.K.), Ltd. Hong Kong C&K Components (Vietnam) Company Limited Vietnam C&K Components SAS France C&K Components, LLC Delaware C&K Connect France C&K France Holdings France Carling Technologies Asia-Pacific Limited Hong Kong Carling Technologies Limited United Kingdom Carling Technologie

Form of Off-Cycle Littelfuse-IXYS Restricted Stock Unit Award Agreement.++

Exhibit 10.62 LITTELFUSE/IXYS CORPORATION LONG-TERM INCENTIVE PLAN OFF-CYCLE RESTRICTED STOCK UNIT AWARD AGREEMENT Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Littelfuse/IXYS Corporation Long-Term Incentive Plan (previous known as IXYS Corporation 2016 Equity Incentive Plan), as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☒ Form 10-K  ☐ Form 20-F  ☐ Form 11-K  ☐ Form 10-Q ☐ Form 10-D  ☐ Form N-CEN  ☐ Form N-CSR For Period Ended: December 28, 2024 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For the Transiti

1 Q4 2024 EARNINGS RELEASE JANUARY 28, 2025 2Littelfuse, Inc. © 2025 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 secu

1 Q4 2024 EARNINGS RELEASE JANUARY 28, 2025 2Littelfuse, Inc. © 2025 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 revi

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2024 Consistent Execution Drives Fourth Quarter Results In-line with Prior Guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2024 Consistent Execution Drives Fourth Quarter Results In-line with Prior Guidance CHICAGO, January 28, 2025 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 28, 2025 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

CHANGE OF CONTROL AGREEMENT GREG HENDERSON

Exhibit 10.3 CHANGE OF CONTROL AGREEMENT For GREG HENDERSON THIS AGREEMENT is made effective as of the 10th day of February 2025, by and between LITTELFUSE, INC., a Delaware corporation (the “Company”), and the executive named above (the “Executive”). W I T N E S S E T H: WHEREAS, the Board of Directors of the Company (the “Board”) has determined that it is in the best interests of the Company and

Littelfuse Announces CEO Retirement and Leadership Transition

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] Littelfuse Announces CEO Retirement and Leadership Transition • CEO David Heinzmann to retire after a distinguished 40-year career • Industry veteran and board director Dr. Greg Henderson appointed CEO Chicago, January 13, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a diversified industrial technology manufacturing com

Retirement Letter, dated January 10, 2025, by and between Littelfuse, Inc. and David W. Heinzmann.

Exhibit 10.1 David W. Heinzmann c/o Littelfuse, Inc. 6133 N. River Rd. Suite 500 Rosemont, IL 60018 January 10, 2025 Re: Retirement Dear Dave: This letter memorializes our recent conversations related to your upcoming retirement as President and Chief Executive Officer of Littelfuse, Inc. (the “Company”) on February 10, 2025 (the “Transition Date”) and your service thereafter as Special Advisor to

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): January 10, 2025 LITTLEFUSE, INC.

Offer Letter, dated January 10, 2025, by and between Littelfuse, Inc and Greg

Exhibit 10.2 EXECUTION VERSION Greg Henderson c/o Littelfuse, Inc. 6133 N. River Rd. Suite 500 Rosemont, IL 60018 January 10, 2025 Dear Greg: Further to your discussion with the Board of Directors of Littelfuse, Inc. (the “Company” or “Littelfuse”), this letter will confirm your appointment to the position of Chief Executive Officer and President of the Company. Upon your acceptance of such appoin

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 28, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 29, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2024 Operational execution drives third quarter earnings above expectations

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2024 Operational execution drives third quarter earnings above expectations CHICAGO, October 29, 2024 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today reported financ

1 Q3 2024 EARNINGS RELEASE OCTOBER 29, 2024 2Littelfuse, Inc. © 2024 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 secu

1 Q3 2024 EARNINGS RELEASE OCTOBER 29, 2024 2Littelfuse, Inc. © 2024 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 revi

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 29, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2024 Diverse and resilient business model drive Q2 sales and adjusted EPS above guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2024 Diverse and resilient business model drive Q2 sales and adjusted EPS above guidance CHICAGO, July 30, 2024 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today repo

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 30, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

1 Q2 2024 EARNINGS RELEASE July 30, 2024 2Littelfuse, Inc. © 2024 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 securit

1 Q2 2024 EARNINGS RELEASE July 30, 2024 2Littelfuse, Inc. © 2024 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

Littelfuse, Inc. Conflict Minerals Report for the Year Ended December 31, 202

EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2023 This Conflict Minerals Report (“Report”) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, “Company,” “we” or “our”) for the year ended December 31, 2023 is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Rule”). The Rule requires the disclo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 8755 W Higgins Road, Suite 500, Chicago, IL 60631 (Address of princi

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 30, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2024 Solid execution drives Q1 sales above, and EPS in-line with guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2024 Solid execution drives Q1 sales above, and EPS in-line with guidance CHICAGO, April 30, 2024 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today reported financial

1 Q1 2024 EARNINGS RELEASE April 30, 2024 2Littelfuse, Inc. © 2024 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 securi

1 Q1 2024 EARNINGS RELEASE April 30, 2024 2Littelfuse, Inc. © 2024 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

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 25, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ☒ Filed by the Registrant  ☐ Filed by a Party other than the Registrant Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ☒ D

United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 30, 2023 Or ☐ Transition Report Pur

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 30, 2023 Or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

Insider Trading Policy

EXHIBIT 19.1 Littelfuse, Inc. Insider Trading Policy PURPOSE This Insider Trading Policy (the “Policy”) provides guidelines with respect to transactions in the securities of Littelfuse, Inc. (the “Company”) and the handling of confidential information about the Company and the companies with which Littelfuse does business. SCOPE This Policy applies to all directors, officers and associates of the

SUBSIDIARIES

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Beit Holdings, LLC Delaware C&K Aerospace France C&K Components (H.K.), Ltd. Hong Kong C&K Components (Vietnam) Company Limited Vietnam C&K Components SAS France C&K Components, LLC Delaware C&K Connect France C&K Dutch B.V. Netherlands C&K Dutch Coöperatief U.A. Netherlands C&K France Holdings France C&K Holdings, LLC Del

Summary of Non-Employee Director Compensation.++

EXHIBIT 10.61 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2023 fiscal year, non-employee directors received an annual retainer of $85,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

Compensation Recovery

EXHIBIT 97.1 Compensation Recovery Policy (Required by NASDAQ Listing Rule 5608) Compensation Recovery Subject to the limited exceptions set forth herein, with respect to the compensation of executive officers and former executive officers subject to this policy as described under “Applicability” below, Littelfuse, Inc. (the “Company”) will recover reasonably promptly the amount of erroneously awa

LFUS / Littelfuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01355-littelfuseinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 13)* Name of issuer: Littelfuse Inc Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 26, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Amended and Restated Annual Incentive Plan.

LITTELFUSE, INC. AMENDED & RESTATED ANNUAL INCENTIVE PLAN restated effective January 1, 2024 1.Establishment. On January 25, 2024, the Board of Directors of Littelfuse, Inc., upon recommendation by the Compensation Committee of the Board of Directors, approved this amended and restated incentive plan for executives and key employees of the Company, to be known as the “Littelfuse, Inc. Amended & Re

1 Q4 2023 EARNINGS RELEASE January 30, 2024 2Littelfuse, Inc. © 2024 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 secu

1 Q4 2023 EARNINGS RELEASE January 30, 2024 2Littelfuse, Inc. © 2024 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 revi

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 30, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2023 Record annual free cash flow driven by a diversified and resilient business model

Exhibit 99.1 FOR IMMEDIATE RELEASE David L. Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2023 Record annual free cash flow driven by a diversified and resilient business model CHICAGO, January 30, 2024 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer

Form of Change of Control Agreement.++

EXHIBIT 10.1 CHANGE OF CONTROL AGREEMENT For [EXECUTIVE] THIS AGREEMENT is made effective as of the 1st day of January, 2024, by and between LITTELFUSE, INC., a Delaware corporation (the “Company”), and the executive named above (the “Executive”). W I T N E S S E T H: WHEREAS, the Board of Directors of the Company (the “Board”) has determined that it is in the best interests of the Company and its

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 1, 2024 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Num

1

8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 November 6, 2023 Ms. Claire Erlanger or Mr. Kevin Woody Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street Washington, DC 20549 Re: Littelfuse, Inc. / DE Form 10-K for the Fiscal Year Ended December 31, 2022 Form 8-K furnished August 1, 2023 File No. 000-20388 Dear Ms. Erlanger and Mr. Wo

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2023 Strong Execution Drives Performance Above Guidance

Exhibit 99.1 FOR IMMEDIATE RELEASE David Kelley 224-727-2535 [email protected] LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2023 Strong Execution Drives Performance Above Guidance CHICAGO, October 31, 2023 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today reported financial results for the

1 Q3 2023 EARNINGS RELEASE October 31, 2023 2Littelfuse, Inc. © 2023 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 secu

1 Q3 2023 EARNINGS RELEASE October 31, 2023 2Littelfuse, Inc. © 2023 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 revi

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 31, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: September 28, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File

Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com

EXHIBIT 99.1 Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com FOR IMMEDIATE RELEASE Media Contact: Emily Davis Head of Communications Littelfuse 224-453-8259 [email protected] Littelfuse Appoints Gayla Delly to Board of Directors CHICAGO, September 28, 2023 – Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industri

Grant Thornton LLP letter to the U.S. Securities and Exchange Commission dated August 16, 2023

August 16, 2023 U.S. Securities and Exchange Commission Office of the Chief Accountant 100 F Street, NE Washington, DC 20549 Re: Littelfuse, Inc. File No. 0-20388 Dear Sir or Madam: We have read Item 4.01 of Form 8-K of Littelfuse, Inc. dated August 16, 2023, and agree with the statements concerning our Firm contained therein. Very truly yours, /s/ GRANT THORNTON LLP

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 15, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Num

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended July 01, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

1 Q2 2023 EARNINGS RELEASE August 1, 2023 2Littelfuse, Inc. © 2023 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 securi

1 Q2 2023 EARNINGS RELEASE August 1, 2023 2Littelfuse, Inc. © 2023 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

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 1, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2023 Resilient business model continues to deliver strong year-to-date performance

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2023 Resilient business model continues to deliver strong year-to-date performance CHICAGO, August 1, 2023 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing compan

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Littelfuse, Inc.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 36-3795742 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 8755 W. Higgins Road, Suite 500 Chicago, IL 60631

Littelfuse, Inc. Conflict Minerals Report for the Year Ended December 31, 202

EX-1.01 2 exhibit101conflictminerals.htm EX-1.01 EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2022 This Conflict Minerals Report (“Report”) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, “Company,” “we” or “our”) for the year ended December 31, 2022 is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 8755 W Higgins Road, Suite 500, Chicago, IL 60631 (Address of princi

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 15, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Number

Littelfuse Appoints Dr. Greg Henderson to Board of Directors

EXHIBIT 99.1 Littelfuse Appoints Dr. Greg Henderson to Board of Directors CHICAGO, May 15, 2023 – Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, announced today the appointment of Dr. Greg Henderson, Senior Vice President of the Automotive & Energy, Communications, and Aerospace Group for Analog Devi

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended April 01, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

1 Q1 2023 EARNINGS RELEASE May 2, 2023 2Littelfuse, Inc. © 2023 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 securitie

1 Q1 2023 EARNINGS RELEASE May 2, 2023 2Littelfuse, Inc. © 2023 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 it

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 2, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exa

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 2, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Number)

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2023 Strong company performance above guidance

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2023 Strong company performance above guidance CHICAGO, May 2, 2023 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, a

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 27, 2023 (Date of earliest event reported) LITTELFUSE, INC. (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 27, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

First Amendment to the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan

EXHIBIT 10.1 FIRST AMENDMENT TO THE LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN (AS AMENDED AND RESTATED EFFECTIVE AS OF APRIL 28, 2017) This First Amendment to the Littelfuse, Inc. Long-Term Incentive Plan, as previously amended and restated effective as of April 28, 2017 (the “Plan”), is made effective as of April 27, 2023, by Littelfuse, Inc. (the “Corporation”). WITNESSETH WHEREAS, the Corporati

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ☒ Filed by the Registrant  ☐ Filed by a Party other than the Registrant Check the appropriate box:  ☐ Preliminary Proxy Statement  ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ☒ D

United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 31, 2022 Or ☐ Transition Report Pur

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 31, 2022 Or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

SUBSIDIARIES

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Beit Holdings, LLC Delaware C&K Aerospace France C&K CoActive, S.A. Costa Rica C&K Components (H.K.), Ltd. Hong Kong C&K Components (Vietnam) Company Limited Vietnam C&K Components SAS France C&K Components, LLC Delaware C&K Connect France C&K Dutch B.V. Netherlands C&K Dutch Coöperatief U.A. Netherlands C&K France Holding

Summary of Non-Employee Director Compensation.++

EXHIBIT 10.62 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2022 fiscal year, non-employee directors received an annual retainer of $85,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

LFUS / Littelfuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01319-littelfuseinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 12)* Name of issuer: Littelfuse Inc. Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the

Bylaws, as amended and restated January 27, 2023.

AMENDED 1//2023 AMENDED AND RESTATED BYLAWS OF LITTELFUSE, INC. TABLE OF CONTENTS SECTION HEADING PAGE Article I Offices 1 Section 1 Registered Office 1 Section 2 Other Offices 1 Article II Stockholders 1 Section 1 Annual Meeting 1 Section 2 Special Meeting 1 Section 3 Place of Meeting 1 Section 4 Notice of Meeting 1 Section 5 Quorum and Adjournment 2 Section 6 Proxies and Electronic Voting 2 Sect

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 27, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: February 1, 2023 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2022 Record annual sales, earnings and cash generation driven by resilient business model and growth strategy

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2022 Record annual sales, earnings and cash generation driven by resilient business model and growth strategy CHICAGO, February 1, 2023 - Littelfuse, Inc. (NASDAQ: LFUS), a diversified,

1 Q4 2022 EARNINGS RELEASE February 1, 2023 2Littelfuse, Inc. © 2023 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 secu

1 Q4 2022 EARNINGS RELEASE February 1, 2023 2Littelfuse, Inc. © 2023 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 revi

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended October 01, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: November 1, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2022 Year-to-date record performance driven by global business execution

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2022 Year-to-date record performance driven by global business execution CHICAGO, November 1, 2022 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustai

1 Q3 2022 EARNINGS RELEASE November 1, 2022 2Littelfuse, Inc. © 2022 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 secu

1 Q3 2022 EARNINGS RELEASE November 1, 2022 2Littelfuse, Inc. ? 2022 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 revi

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended July 02, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

Deed of Amendment No. 1 Sale and Purchase Agreement, dated July 18, 2022, by and between Cayman NIH VI BEIT Holdings, L.P. and Littelfuse, Inc.

DEED OF AMENDMENT NO. 1 TO SALE AND PURCHASE AGREEMENT This DEED OF AMENDMENT NO. 1 TO THE SALE AND PURCHASE AGREEMENT (this ?Amendment?) is dated as of 18 July, 2022, by and between Cayman NIH VI BEIT Holdings, L.P., a Cayman Islands exempted limited liability partnership (?Seller?), and Littelfuse, Inc., a Delaware corporation (?Buyer?). The Seller and Buyer shall be referred to herein from time

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2022 Global business execution delivers strong financial performance

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2022 Global business execution delivers strong financial performance CHICAGO, August 2, 2022 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable

1 Q2 2022 EARNINGS RELEASE August 2, 2022 2Littelfuse, Inc. © 2022 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 securi

1 Q2 2022 EARNINGS RELEASE August 2, 2022 2Littelfuse, Inc. © 2022 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

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 2, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

SUBSIDIARY GUARANTY AGREEMENT Dated as of July 18, 2022 CARLING TECHNOLOGIES, INC., a Connecticut corporation HARTLAND CONTROLS HOLDING CORP., a Delaware corporation HARTLAND CONTROLS L.L.C., an Illinois limited liability company IXYS BUCKEYE, LLC, a

EXHIBIT 10.2 SUBSIDIARY GUARANTY AGREEMENT Dated as of July 18, 2022 of CARLING TECHNOLOGIES, INC., a Connecticut corporation HARTLAND CONTROLS HOLDING CORP., a Delaware corporation HARTLAND CONTROLS L.L.C., an Illinois limited liability company IXYS BUCKEYE, LLC, a Delaware limited liability company IXYS INTEGRATED CIRCUITS DIVISION, LLC, a Massachusetts limited liability company IXYS LONG BEACH,

Regulation FD Disclosure, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 18, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

LITTELFUSE COMPLETES ACQUISITION OF C&K SWITCHES

EXHIBIT 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE COMPLETES ACQUISITION OF C&K SWITCHES CHICAGO, IL ? July 19, 2022 ? Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, and safer world, today announced the completion o

1 LITTELFUSE COMPLETES ACQUISITION OF C&K SWITCHES July 19, 2022 EXHIBIT 99.2 2Littelfuse, Inc. © 2022 DISCLAIMERS Important Information About Littelfuse, Inc. This presentation does not constitute or form part of, and should not be construed as, an

1 LITTELFUSE COMPLETES ACQUISITION OF C&K SWITCHES July 19, 2022 EXHIBIT 99.2 2Littelfuse, Inc. ? 2022 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

, by and among Littelfuse, Inc., certain subsidiaries of the company, as designated borrowers, certain subsidiaries of the company, as guarantors, the lenders party thereto and Bank of America, N.A., as agent, JPMorgan Chase Bank, N.A., as syndication agent, PNC Bank, National Association

Execution Version Deal CUSIP: 53700DAM5 Revolver CUSIP: 53700DAN3 Term CUSIP: 53700DAP8 CREDIT AGREEMENT Dated as of June 30, 2022 among LITTELFUSE, INC.

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: June 30, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

Littelfuse, Inc. Conflict Minerals Report for the Year Ended December 31, 2021.

EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2021 This Conflict Minerals Report (?Report?) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, ?Company,? ?we? or ?our?) for the year ended December 31, 2021 is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the ?Rule?). The Rule requires the disclo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 8755 W Higgins Road, Suite 500, Chicago, IL 60631 (Address of princi

Note Purchase Agreement, dated May 18, 2022, among Littelfuse, Inc. and note purchasers listed

Exhibit 10.1 Littelfuse, Inc. $100,000,000 4.33% Senior Notes due June 30, 2032 Note Purchase Agreement Dated May 18, 2022 Table of Contents Section Heading Page Section 1. Authorization of Notes 1 Section 1.1. Description of Notes 1 Section 1.2. Applicable Interest Rate, Interest Payment Dates and Maturity Date 1 Section 1.3. Subsidiary Guaranty 1 Section 1.4. Additional Interest 2 Section 2. Sal

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 18, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Number

Littelfuse, Inc. First Amendment Dated as of May 18, 2022 Note Purchase Agreement Dated as of November 15, 2017 Re: $50,000,000 3.48% Senior Notes, Series A, due February 15, 2025 $125,000,000 3.78% Senior Notes, Series B, due February 15, 2030

Exhibit 10.5 Execution Version Littelfuse, Inc. First Amendment Dated as of May 18, 2022 to Note Purchase Agreement Dated as of November 15, 2017 Re: $50,000,000 3.48% Senior Notes, Series A, due February 15, 2025 $125,000,000 3.78% Senior Notes, Series B, due February 15, 2030 First Amendment to 2017 note agreement First Amendment to Note Purchase Agreement This First Amendment dated as of May 18

Littelfuse Netherlands C.V. First Amendment Dated as of May 18, 2022 Note Purchase Agreement Dated as of December 8, 2016 Re: €117,000,000 1.14% Senior Notes, Series A, due December 8, 2023 €95,000,000 1.83% Senior Notes, Series B, due December 8, 20

Exhibit 10.4 Execution Version Littelfuse Netherlands C.V. First Amendment Dated as of May 18, 2022 to Note Purchase Agreement Dated as of December 8, 2016 Re: €117,000,000 1.14% Senior Notes, Series A, due December 8, 2023 €95,000,000 1.83% Senior Notes, Series B, due December 8, 2028 First Amendment to 2016 cross border note agreement First Amendment to Note Purchase Agreement This First Amendme

Subsidiary Guaranty Agreement

Exhibit 10.2 Subsidiary Guaranty Agreement This Subsidiary Guaranty Agreement, dated as of [], 2022 (this ?Subsidiary Guaranty Agreement?), is made by each of the undersigned (each a ?Subsidiary Guarantor? and, together with each of the other signatories hereto and any other entities from time to time parties hereto pursuant to Section 14.1 hereof, the ?Subsidiary Guarantors?) in favor of the Purc

Littelfuse, Inc. First Amendment Dated as of May 18, 2022 Note Purchase Agreement Dated as of December 8, 2016 Re: $25,000,000 3.03% Senior Notes, Series A, due February 15, 2022 $100,000,000 3.74% Senior Notes, Series B, due February 15, 2027 First

Exhibit 10.3 Execution Version Littelfuse, Inc. First Amendment Dated as of May 18, 2022 to Note Purchase Agreement Dated as of December 8, 2016 Re: $25,000,000 3.03% Senior Notes, Series A, due February 15, 2022 $100,000,000 3.74% Senior Notes, Series B, due February 15, 2027 First Amendment to 2016 domestic note agreement First Amendment to Note Purchase Agreement This First Amendment dated as o

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended April 02, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2022 Record sales and earnings driven by strong worldwide execution and robust market demand

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2022 Record sales and earnings driven by strong worldwide execution and robust market demand CHICAGO, May 3, 2022 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empo

1 Q1 2022 EARNINGS RELEASE May 3, 2022 2Littelfuse, Inc. © 2022 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 se

1 Q1 2022 EARNINGS RELEASE May 3, 2022 2Littelfuse, Inc. ? 2022 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

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: May 3, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Number)

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 28, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

Sale and Purchase Agreement, dated April 7, 2022, by and between Cayman NIH VI BEIT Holdings, L.P. and Littelfuse, Inc.

Exhibit 2.1 Weil, Gotshal & Manges (London) LLP 110 Fetter Lane London EC4A 1AY +44 20 7903 1000 main tel +44 20 7903 0990 main fax weil.com EXECUTION VERSION STRICTLY CONFIDENTIAL April 7, 2022 SALE AND PURCHASE AGREEMENT relating to the sale of all of the Units in BEIT HOLDINGS, LLC between CAYMAN NIH VI BEIT HOLDINGS, L.P. as Seller and LITTELFUSE, INC. as Buyer TABLE OF CONTENTS 1 SALE AND PUR

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): April 7, 2022 LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

LITTELFUSE TO ACQUIRE C&K SWITCHES Enhances growth across a broad range of end markets

EX-99.1 4 brhc10036099ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE TO ACQUIRE C&K SWITCHES Enhances growth across a broad range of end markets CHICAGO, IL – April 8, 2022 – Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company em

Warranty Deed, dated April 7, 2022, by and between the warrantors party thereto and Littelfuse, Inc.

Exhibit 2.2 EXECUTION VERSION STRICTLY CONFIDENTIAL 7 April 2022 WARRANTY DEED relating to BEIT HOLDINGS, LLC between THE PERSONS NAMED IN SCHEDULE 1 as Warrantors and LITTELFUSE, INC. as Buyer Table of Contents Page 1 WARRANTIES 1 2 SECOND DISCLOSURE LETTER 2 3 INSURANCE 2 4 LIMITATIONS ON LIABILITY AND NOTICE OF AND CONDUCT OF CLAIMS 2 5 ASSIGNMENT 3 6 ENTIRE AGREEMENT 3 7 GENERAL 3 SCHEDULE 1 W

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ? Filed by the Registrant ? Filed by a Party other than the Registrant Check the appropriate box: ? Preliminary Proxy Statement ? CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ? Definitive Proxy State

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ? Filed by the Registrant ?? Filed by a Party other than the Registrant Check the appropriate box: ?? Preliminary Proxy Statement ?? CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ? D

Subsidiary Guarantor Supplement (Fall 2017 NPA) - Carling Technologies, Inc. Subsidiaries

Exhibit 10.76 SUBSIDIARY GUARANTOR SUPPLEMENT THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of December 30, 2021 is made by CARLING TECHNOLOGIES, INC., a Connecticut corporation (the ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below: PRELIMINARY STATEMENTS: I.Purs

Subsidiary Guarantor Supplement (Cross-Border NPA) - Carling Technologies, Inc. Subsidiaries

Exhibit 10.75 Subsidiary Guarantor Supplement THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of December 30, 2021 is made by CARLING TECHNOLOGIES, INC., a Connecticut corporation (the ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below: Preliminary Statements: I. Pur

United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended January 01, 2022 Or ☐ Transition Report Purs

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended January 01, 2022 Or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

Carling Technologies, Inc. Credit Agreement Joinder Agreement.

Exhibit 10.73 JOINDER AGREEMENT THIS JOINDER AGREEMENT (the ?Agreement?), dated as of December 30, 2021, is by and between (i) CARLING TECHNOLOGIES, INC., a Connecticut corporation (the ?Subsidiary?), and (ii) BANK OF AMERICA, N.A., in its capacity as Agent under that certain Amended and Restated Credit Agreement (as it may be amended, modified, restated or supplemented from time to time, the ?Cre

First Amendment to Stock Purchase Agreement, dated November 29, 2021, by and between Littelfuse, Inc., the Shareholders of Carling Technologies, Inc., and Christopher T. Sorenson

Exhibit 2.3 FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT This First Amendment to Stock Purchase Agreement (this ?Amendment?) is made and entered into as of November 29, 2021, by and among Carling Technologies, Inc. a Connecticut corporation (the ?Company?), the shareholders of the Company (each a ?Seller? and collectively ?Sellers?), Christopher T. Sorenson in his capacity as ?Sellers? Representati

Summary of Non-Employee Director Compensation.

Exhibit 10.77 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2021 fiscal year, non-employee directors received an annual retainer of $75,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

Subsidiary Guarantor Supplement (Domestic NPA) – Carling Technologies, Inc. Subsidiaries

Exhibit 10.74 Subsidiary Guarantor Supplement THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of December 30, 2021 is made by CARLING TECHNOLOGIES, INC., a Connecticut corporation (the ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued pursuant to the Note Agreement described below: Preliminary Statements: I. Pur

SUBSIDIARIES

Exhibit 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Carling Technologies Asia-Pacific Limited Hong Kong Carling Technologies GmbH Germany Carling Technologies India Private Limited India Carling Technologies Limited United Kingdom Carling Technologies S.A.S. France Carling Technologies, Inc. Connecticut Carlingswitch Enterprises Limited Hong Kong Carlingswitch Manufacturing

LFUS / Littelfuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: Littelfuse Inc. Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Ru

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: February 1, 2022 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2021 Record annual sales and earnings driven by strong business execution

EX-99.1 2 q42021ex991.htm EX-99.1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2021 Record annual sales and earnings driven by strong business execution CHICAGO, February 1, 2022 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial te

1 Q4 / FULL YEAR 2021 EARNINGS RELEASE February 1, 2022 2Littelfuse, Inc. © 2022 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

1 Q4 / FULL YEAR 2021 EARNINGS RELEASE February 1, 2022 2Littelfuse, Inc. ? 2022 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 st

Regulation FD Disclosure, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: November 30, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File N

LITTELFUSE COMPLETES ACQUISITION OF CARLING TECHNOLOGIES

NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE COMPLETES ACQUISITION OF CARLING TECHNOLOGIES CHICAGO, IL ? November 30, 2021 ? Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, and safer world, today announced the completion of

1 LITTELFUSE COMPLETES ACQUISITION OF CARLING TECHNOLOGIES November 30, 2021 2Littelfuse, Inc. © 2021 DISCLAIMERS Important Information About Littelfuse, Inc. This presentation does not constitute or form part of, and should not be construed as, an o

EX-99.2 3 littelfusecompletesacqui.htm EX-99.2 1 LITTELFUSE COMPLETES ACQUISITION OF CARLING TECHNOLOGIES November 30, 2021 2Littelfuse, Inc. © 2021 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 shou

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 25, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2021 Record sales and earnings driven by strong business fundamentals

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2021 Record sales and earnings driven by strong business fundamentals CHICAGO, October 26, 2021 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainab

1 Q3 2021 EARNINGS RELEASE October 26, 2021 2Littelfuse, Inc. © 2021 DISCLAIMERS Important Information About Interfuse, Inc. This presentation does not constitute or form part of, and should not be construed as, an offer or solicitation to purchase o

1 Q3 2021 EARNINGS RELEASE October 26, 2021 2Littelfuse, Inc. ? 2021 DISCLAIMERS Important Information About Interfuse, 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 Interfuse, Inc. and no investment decision should be made based upon the information provided herein. Interfuse strongly urges yo

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 26, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 19, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Stock Purchase Agreement, dated October 19, 2021, by and between Littelfuse, Inc., the Shareholders of Carling Technologies, Inc., and Christopher T. Sorenson, as Sellers’ Representative*

STOCK PURCHASE AGREEMENT by and among CARLING TECHNOLOGIES, INC., THE SHAREHOLDERS OF CARLING TECHNOLOGIES, INC. and Christopher T. Sorenson as Sellers? Representative and LITTELFUSE, INC. dated as of October 19, 2021 Table of Contents ARTICLE I DEFINITIONS 1 ARTICLE II PURCHASE AND SALE 14 2.1 Purchase and Sale 14 2.2 Base Purchase Price 14 2.3 Transactions to be Effected at the Closing 14 2.4 Pu

LITTELFUSE TO ACQUIRE CARLING TECHNOLOGIES Accelerates growth in commercial vehicles and communications infrastructure

NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE TO ACQUIRE CARLING TECHNOLOGIES Accelerates growth in commercial vehicles and communications infrastructure CHICAGO, IL and PLAINVILLE, CT ? October 20, 2021 ? Littelfuse, Inc. (NASDAQ: LFUS) and Carling Technologies, Inc. (?Carling?) today announ

1 Q2 2021 EARNINGS RELEASE July 28, 2021 2Littelfuse, Inc. © 2021 DISCLAIMERS Important Information About Interfuse, Inc. This presentation does not constitute or form part of, and should not be construed as, an offer or solicitation to purchase or s

1 Q2 2021 EARNINGS RELEASE July 28, 2021 2Littelfuse, Inc. ? 2021 DISCLAIMERS Important Information About Interfuse, 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 Interfuse, Inc. and no investment decision should be made based upon the information provided herein. Interfuse strongly urges you t

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 28, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

Employment offer letter between Littelfuse, Inc. and Maggie Chu, dated April 28, 2021

April 27, 2021 Dear Maggie, It was pleasure talking to you. The following is a summary of the key provisions of our offer of employment. We will provide you with more detailed documents in due course, but I wanted to make sure you have the outline of our offer in writing. Position: Senior Vice President and Chief Human Resources Officer Start Date: As soon as practical, but in no event later than

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 26, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2021 Record sales and earnings driven by strong business fundamentals

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2021 Record sales and earnings driven by strong business fundamentals CHICAGO, July 28, 2021 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 8755 W Higgins Road, Suite 500, Chicago, IL 60631 (Address of princi

LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2020

EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2020 This Conflict Minerals Report (?Report?) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, ?Company,? ?we? or ?our?) for the year ended December 31, 2020 is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the ?Rule?). The Rule requires the disclo

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: Littelfuse Inc. Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: April 30, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule

1 Q1 2021 EARNINGS RELEASE April 28, 2021 2Littelfuse, Inc. © 2021 DISCLAIMERS Important Information About Interfuse, Inc. This presentation does not constitute or form part of, and should not be construed as, an offer or solicitation to purchase or

1 Q1 2021 EARNINGS RELEASE April 28, 2021 2Littelfuse, Inc. ? 2021 DISCLAIMERS Important Information About Interfuse, 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 Interfuse, Inc. and no investment decision should be made based upon the information provided herein. Interfuse strongly urges you

Hartland Credit Agreement Joinder Agreement

EXHIBIT 10.1 JOINDER AGREEMENT THIS JOINDER AGREEMENT (the ?Agreement?), dated as of March 5, 2021, is by and between (i) each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, a ?Subsidiary?), and (ii) BANK OF AMERICA, N.A., in its capacity as Agent under that certain Amended and Restated Credit Agreement (as it

Subsidiary Guarantor Supplement (Cross-Border NPA) - Hartland Subsidiaries

EXHIBIT 10.3 Subsidiary Guarantor Supplement THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued

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

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 27, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 28, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2021 Record sales driven by strong worldwide execution

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2021 Record sales driven by strong worldwide execution CHICAGO, April 28, 2021 - Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a sustainable, connected, an

Subsidiary Guarantor Supplement (Domestic NPA) - Hartland Subsidiaries

EXHIBIT 10.2 Subsidiary Guarantor Supplement THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued

Subsidiary Guarantor Supplement (Fall 2017 NPA) - Hartland Subsidiaries

EXHIBIT 10.4 SUBSIDIARY GUARANTOR SUPPLEMENT THIS SUBSIDIARY GUARANTOR SUPPLEMENT (the ?Subsidiary Guarantor Supplement?), dated as of March 5, 2021 is made by each of HARTLAND CONTROLS HOLDING CORP., a Delaware corporation, and HARTLAND CONTROLS L.L.C., an Illinois limited liability company (each, an ?Additional Subsidiary Guarantor?), in favor of the holders from time to time of the Notes issued

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 22, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

- DEF 14A 2021 PROXY STATEMENT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ? Filed by the Registrant ? Filed by a Party other than the Registrant Check the appropriate box: ? Preliminary Proxy Statement ? CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ? Defi

- DEFA14A PROXY NOTICE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ? Filed by the Registrant ? Filed by a Party other than the Registrant Check the appropriate box: ? Preliminary Proxy Statement ? CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ? Definitive Proxy State

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: February 23, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File N

1 LITTELFUSE 2021 INVESTOR & ANALYST EVENT February 23, 2021 2Confidential and Proprietary | Littelfuse, Inc. © 2021 DISCLAIMERS Important Information About Littelfuse, Inc. This presentation does not constitute or form part of, and should not be con

EX-99.1 2 littelfuseinvestorandana.htm EX-99.1 1 LITTELFUSE 2021 INVESTOR & ANALYST EVENT February 23, 2021 2Confidential and Proprietary | Littelfuse, Inc. © 2021 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 investmen

LITTELFUSE TO HOST 2021 VIRTUAL INVESTOR & ANALYST EVENT TODAY AND REAFFIRMS FIRST QUARTER 2021 GUIDANCE

Exhibit 99.2 NEWS RELEASE NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE TO HOST 2021 VIRTUAL INVESTOR & ANALYST EVENT TODAY AND REAFFIRMS FIRST QUARTER 2021 GUIDANCE CHICAGO, February 23, 2021 ? Littelfuse, Inc. (NASDAQ: LFUS), an industrial technology manufacturing company empowering a susta

SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Cole Hersee S de RL de CV Mexico CSP-Componentes Semiconductores de Portugal LDA Portugal Dongguan Littelfuse Electronics Co., Ltd. China H.I. Verwaltungs GmbH Germany Hamlin Electronics

EXHIBIT 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Cole Hersee S de RL de CV Mexico CSP-Componentes Semiconductores de Portugal LDA Portugal Dongguan Littelfuse Electronics Co., Ltd. China H.I. Verwaltungs GmbH Germany Hamlin Electronics (Suzhou) Ltd. China Hamlin Electronics Europe Ltd. United Kingdom Hamlin Electronics GmbH Germany Hartland Controls Holding Corp. Delawar

Form Tier II Change of Control Agreement, effective January 1, 2021

EXHIBIT 10.72 Tier II CHANGE OF CONTROL AGREEMENT For [Executive Name] THIS AGREEMENT is made effective as of the 1st day of January, 2021, by and between LITTELFUSE, INC., a Delaware corporation (the ?Company?), and the executive named above (the ?Executive?). W I T N E S S E T H: WHEREAS, the Board of Directors of the Company (the ?Board?) has determined that it is in the best interests of the C

Annual Report - 10-K

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 26, 2020 Or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

Second Amendment to the Littelfuse, Inc. Supplemental Retirement and Savings Plan, effective January 1, 2020

EXHIBIT 10.69 SECOND AMENDMENT TO THE LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN This SECOND AMENDMENT to the LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN is made by Littelfuse, Inc. (the "Company"), effective as of January 1, 2020. WITNESSETH: WHEREAS, the Company sponsors and maintains the Supplemental Retirement and Savings Plan (the "Plan"); and WHEREAS, the Company

Form Tier I Change of Control Agreement, effective January 1, 2021.

EXHIBIT 10.71 Tier I CHANGE OF CONTROL AGREEMENT For [Executive Name] THIS AGREEMENT is made effective as of [the 1st day of January, 2021,] by and between LITTELFUSE, INC., a Delaware corporation (the ?Company?), and the executive named above (the ?Executive?). W I T N E S S E T H: WHEREAS, the Board of Directors of the Company (the ?Board?) has determined that it is in the best interests of the

Summary of Non-Employee Director Compensation.

EXHIBIT 10.73 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2020 fiscal year, non-employee directors received an annual retainer of $75,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

First Amendment to the Littelfuse, Inc. Supplemental Retirement and Savings Plan, effective January 1, 2019

EX-10.68 2 exhibit1068-firstamendment.htm EX-10.68 EXHIBIT 10.68 FIRST AMENDMENT TO THE LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN This FIRST AMENDMENT to the LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN is made by Littelfuse, Inc. (the "Company"), effective as of January 1, 2019. WITNESSETH: WHEREAS, the Company sponsors and maintains the Supplemental Retirement and Sa

Third Amendment to the Littelfuse, Inc. Supplemental Retirement and Savings Plan, effective January 1, 2020.

EXHIBIT 10.70 THIRD AMENDMENT TO THE LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN This THIRD AMENDMENT to the LITTELFUSE, INC. SUPPLEMENTAL RETIREMENT AND SAVINGS PLAN is made by Littelfuse, Inc. (the ?Company?), effective as of the dates set forth below. WITNESSETH: WHEREAS, the Company sponsors and maintains the Supplemental Retirement and Savings Plan (the ?Plan?); WHEREAS, the Com

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: Littelfuse Inc. Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rul

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2020 Company delivers solid performance amidst global pandemic

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2020 Company delivers solid performance amidst global pandemic CHICAGO, February 3, 2021 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit prot

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: February 3, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 21, 2021 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

-

8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 December 2, 2020 Ms. Effie Simpson Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street Washington, DC 20549 Re: Littelfuse, Inc. Form 10-K for the Fiscal Year Ended December 28, 2019 Filed February 21, 2020 Form 10-Q for the Period Ended September 26, 2020 Filed October 28, 2020 File No. 0

Amended and Restated Littelfuse Deferred Compensation Plan for Non-Employee Directors

AMENDED AND RESTATED LITTELFUSE DEFERRED COMPENSATION PLAN FOR NON-EMPLOYEE DIRECTORS ARTICLE I PURPOSE OF THE PLAN The purpose of the Littelfuse Deferred Compensation Plan for Non-Employee Directors (the “Plan”) is to promote the ownership by non-employee directors of Littelfuse, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 28, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2020 Company performance exceeds expectations

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2020 Company performance exceeds expectations CHICAGO, October 28, 2020 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensin

Quarterly Report - 10-Q

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 26, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2020 Company performance exceeds expectations

Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2020 Company performance exceeds expectations CHICAGO, July 29, 2020 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensing,

Form of Retention Stock Option Award Agreement under the Littelfuse, Inc. Long-Term Incentive Plan

a108formretentionstockop AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RETENTION STOCK OPTION AWARD AGREEMENT Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to- time (the “Plan”), a nonqualified option to purchase shares of Littelfuse, Inc. common st

Quarterly Report - 10-Q

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 27, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

Form of Retention Restricted Stock Unit Award Agreement under the IXYS Corporation Equity Incentive Plan

a1011formixysretentionre IXYS CORPORATION 2013 EQUITY INCENTIVE PLAN RETENTION RESTRICTED STOCK UNIT AWARD AGREEMENT Littelfuse, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 29, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

Form of Retention Stock Option Award Agreement under the IXYS Corporation Equity Incentive Plan

a109formixysretentionsto IXYS CORPORATION 2013 EQUITY INCENTIVE PLAN RETENTION STOCK OPTION AWARD AGREEMENT Littelfuse, Inc.

Form of Retention Restricted Stock Unit Award Agreement under the Littelfuse, Inc. Long-Term Incentive Plan

a1010formretentionrestri AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RETENTION RESTRICTED STOCK UNIT AWARD AGREEMENT Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to- time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units represe

- LITTELFUSE FORM SD FOR FYE 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 8755 W Higgins Road, Suite 500, Chicago, IL 60631 (Address of princi

Littelfuse, Inc. Conflict Minerals Report for the Year Ended December 31, 2019.

EXHIBIT 1.01 LITTELFUSE, INC. Conflict Minerals Report For the Year Ended December 31, 2019 This Conflict Minerals Report (“Report”) of Littelfuse, Inc. and its consolidated subsidiaries (collectively, “Company,” “we” or “our”) for the year ended December 31, 2019 is filed in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Rule”). The Rule requires the disclo

Quarterly Report - 10-Q

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 28, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-

LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2020 Company prioritizes global associates, customers and long-term financial health of the business in response to the COVID-19 pandemic

Page 1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FIRST QUARTER RESULTS FOR 2020 Company prioritizes global associates, customers and long-term financial health of the business in response to the COVID-19 pandemic CHICAGO, April 29, 2020 - Littelfuse, Inc. (NASDAQ: LFU

Form of Restricted Stock Unit Award Agreement (IXYS Tier II) under the IXYS Corporation Equity Incentive Plan

a1072020formixysincentiv IXYS CORPORATION [20] EQUITY INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier II) Littelfuse, Inc.

Form of Restricted Stock Unit Award Agreement (Tier II) under the Littelfuse, Inc. Long-Term Incentive Plan.

a1062020formtieriirsuawa AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier II) Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units represen

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 29, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

Form of Restricted Stock Unit Award Agreement (Non-Employee Director) under the Littelfuse, Inc. Long-Term Incentive Plan. ++

EXHIBIT 10.3 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Non-Employee Director) The Board of Directors (the “Board”) of Littelfuse, Inc. (the “Company”), based on the recommendation of the Compensation Committee, hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as

Form of Option Award Agreement (Tier I) under the Littelfuse, Inc. Long-Term Incentive Plan. ++

EXHIBIT 10.2 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN STOCK OPTION AWARD AGREEMENT (Tier I) Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a nonqualified option to purchase shares of Littelfuse, Inc. common stock (the “Opti

Form of Option Award Agreement (Non-Employee Director) under the Littelfuse, Inc. Long-Term Incentive Plan. +

EXHIBIT 10.4 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN STOCK OPTION AWARD AGREEMENT (Non-Employee Director) The Board of Directors (the “Board”) of Littelfuse, Inc. (the “Company”), based on the recommendation of the Compensation Committee, hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended f

Form of Restricted Stock Unit Award Agreement (Tier I) under the Littelfuse, Inc. Long-Term Incentive Plan. ++

EXHIBIT 10.1 AMENDED AND RESTATED LITTELFUSE, INC. LONG-TERM INCENTIVE PLAN RESTRICTED STOCK UNIT AWARD AGREEMENT (Tier I) Littelfuse, Inc. (the “Company”) hereby grants to [Name] (the “Grantee”), a Participant in the Amended and Restated Littelfuse, Inc. Long-Term Incentive Plan, as amended from time-to-time (the “Plan”), a Restricted Stock Unit Award (the “Award”) for units representing shares o

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 22, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numb

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 24, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File

Amended and Restated Credit Agreement, dated as of April 3, 2020, by and among Littelfuse, Inc., certain subsidiaries of the company, as designated borrowers, certain subsidiaries of the company, as guarantors, the lenders party thereto and Bank of America, N.A., as agent, JPMorgan Chase Bank, N.A., as syndication agent, PNC Bank, National Association, as senior documentation agent, BMO Harris Bank, N.A. and Wells Fargo Bank, National Association, as co-documentation agents, BofA Securities, Inc. as sole bookrunner and joint lead arranger, and JPMorgan Chase Bank, N.A., as joint lead arrange

EXHIBIT 10.1 AMENDED AND RESTATED CREDIT AGREEMENT Dated as of April 3, 2020 among LITTELFUSE, INC., as the Company, CERTAIN SUBSIDIARIES OF THE COMPANY IDENTIFIED HEREIN, as the Designated Borrowers, CERTAIN SUBSIDIARIES OF THE COMPANY IDENTIFIED HEREIN, as the Guarantors, BANK OF AMERICA, N.A., as Agent, Swing Line Lender and L/C Issuer and The Other Lenders Party Hereto JPMORGAN CHASE BANK, N.A

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: April 3, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

LFUS / Littelfuse, Inc. DEF 14A - - DEF 14A - 2020 PROXY STATEMENT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ý Filed by the Registrant ☐ Filed by a Party other than the Registrant Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ý Defi

LFUS / Littelfuse, Inc. DEFA14A - - DEFA14A - 2020 ANNUAL MEETING NOTICE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ý Filed by the Registrant ☐ Filed by a Party other than the Registrant Check the appropriate box: ☐ Preliminary Proxy Statement ☐ CONFIDENTIAL, FOR USE OF THE COMMISSION ONLY (AS PERMITTED BY RULE 14a-6(e)(2)) ☐ Definitive Proxy State

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: February 26, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File N

UPDATE TO FIRST QUARTER GUIDANCE REPORTED BY LITTELFUSE

Page 1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com UPDATE TO FIRST QUARTER GUIDANCE REPORTED BY LITTELFUSE CHICAGO, February 26, 2020 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensing, announced today that as

Description of Securities of Littelfuse, Inc.

EXHIBIT 4.1 DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The information contained herein regarding the Littelfuse, Inc. securities is a summary only and does not purport to be a complete description of the Littelfuse, Inc. certificate of incorporation, dated as of November 25, 1991, as amended April 25, 1997 (“Charter”), and the Littelfuse amended a

SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Cole Hersee S de RL de CV Mexico CSP-Componentes Semiconductores de Portugal LDA Portugal Dongguan Littelfuse Electronics Co., Ltd. China H.I. Verwaltungs GmbH Germany Hamlin Electronics

EXHIBIT 21.1 SUBSIDIARIES Name Jurisdiction of Organization Accel AB Sweden Cole Hersee S de RL de CV Mexico CSP-Componentes Semiconductores de Portugal LDA Portugal Dongguan Littelfuse Electronics Co., Ltd. China H.I. Verwaltungs GmbH Germany Hamlin Electronics (Suzhou) Ltd. China Hamlin Electronics Europe Ltd. United Kingdom Hamlin Electronics GmbH Germany IXYS Buckeye, LLC Delaware IXYS Global

Amended and Restated Employment Agreement entered into between Littelfuse Europe GmbH and Alexander Conrad, effective April 1, 2019.

EXHIBIT 10.77 AMENDED AND RESTATED EMPLOYMENT AGREEMENT AMENDED AND RESTATED EMPLOYMENT AGREEMENT (“Agreement”) made and entered into by and between Littelfuse Europe GmbH (the “Company”) and Alexander Conrad (the “Executive”), effective as of April 1, 2019. In exchange and in consideration for the rights and benefits they each receive under this Agreement, the Parties, intending to be legally bou

Summary of Non-Employee Director Compensation.++

EXHIBIT 10.78 Littelfuse, Inc. Summary of Non-Employee Director Compensation For the 2019 fiscal year, non-employee directors received an annual retainer of $75,000, paid in quarterly installments, plus reimbursement of reasonable expenses relating to attendance at meetings. Our directors are also reimbursed for the costs associated with attending one continuing education program every three years

Annual Report - 10-K

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 (Mark one) for the fiscal year ended December 28, 2019 Or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from to Commission file number 0-20388

LFUS / Littelfuse, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Littelfuse Inc Title of Class of Securities: Common Stock CUSIP Number: 537008104 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 29, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2019

Page 1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS FOURTH QUARTER AND FULL YEAR RESULTS FOR 2019 CHICAGO, January 29, 2020 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensing, today reported f

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: January 24, 2020 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Littelfuse Appoints Maria C. Green to Board of Directors

EXHIBIT 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com Littelfuse Appoints Maria C. Green to Board of Directors CHICAGO, Monday, January 27, 2020 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensing, announced today the app

LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2019 Company performance in line with expectations

Page 1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS THIRD QUARTER RESULTS FOR 2019 Company performance in line with expectations CHICAGO, October 30, 2019 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power contro

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: October 30, 2019 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Nu

Quarterly Report - 10-Q

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 28, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

Consulting Agreement Extension entered into between Littelfuse, Inc. and Dr. Nathan Zommer, dated July 25, 2019. ++

ex101zommerconsultingag EXHIBIT 10.1 CONSULTING AGREEMENT EXTENSION This Consulting Agreement Extension (the “Agreement”) is made and entered into as of this 25th day of July, 2019, as an extension of the original Consulting Agreement dated August 1, 2018 (the “Original Consulting Agreement”), by and between Littelfuse, Inc. (the “Company”), a corporation duly established and existing under the la

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: August 28, 2019 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Num

Investor Presentation August 28, 2019 1 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 Littelf

lfusirdeckmasterfinalnon Investor Presentation August 28, 2019 1 DISCLAIMERS Important Information About Littelfuse, Inc.

LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2019 Company increases dividend by 12% - continues double-digit increase

Page 1 Exhibit 99.1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com LITTELFUSE REPORTS SECOND QUARTER RESULTS FOR 2019 Company increases dividend by 12% - continues double-digit increase CHICAGO, July 31, 2019 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit prot

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20579 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report: July 31, 2019 (Date of earliest event reported) LITTELFUSE, INC. (Exact name of registrant as specified in its charter) Delaware 0-20388 36-3795742 (State of other jurisdiction of incorporation) (Commission File Numbe

Quarterly Report - 10-Q

Table of Contents United States Securities and Exchange Commission Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 29, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 0-2

Littelfuse Announces Preliminary Financial Results for Second Quarter of Fiscal Year 2019

Page 1 NEWS RELEASE Littelfuse Inc. 8755 West Higgins Road, Suite 500 Chicago, Illinois 60631 p: (773) 628-1000 f: (773) 628-0802 www.littelfuse.com Littelfuse Announces Preliminary Financial Results for Second Quarter of Fiscal Year 2019 CHICAGO, July 16, 2019 - Littelfuse, Inc. (NASDAQ: LFUS), a global manufacturer of leading technologies in circuit protection, power control and sensing, today r