Director — Todd Kelsey: The filing discloses the appointment of a new independent director to fill a vacancy created by an increase in board size, which is a standard governance action rather than a management departure.

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On July 29, 2026, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter ended June 27,…

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On May 6, 2026, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter ended March 28,…

The Board approved new forms of award agreements for equity grants to executive officers.

without definition shall have the meanings specified in the Credit Agreement. The Company, certain subsidiaries of the Company as designated borrowers, and certain subsidiaries of the Company as guarantors, entered into an Amended and Restated Credit Agreement (the “Credit Agreement”) with each of the banks, financial institutions and other institutional lenders listed on the respective signature pages thereof (the “Lenders”), Bank of America, N.A., as agent, Citibank, N.A. and JPMorgan Chase…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. On March 12, 2026, the Company entered into the Credit Agreement described in

Director — Holly B. Paeper: Ms. Holly B. Paeper was appointed to the Board of Directors and will also serve on the Technology Committee.

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On January 28, 2026, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter and full ye…

Executive Vice President, Mergers & Acquisitions, Chief Legal Officer and Corporate Secretary — Ryan K. Stafford: The filing discloses the agreed-upon separation of a senior executive (EVP/Chief Legal Officer) with severance benefits, representing a genuine departure of a key officer.

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On October 29, 2025, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter ended Septe…

Entry into a Material Definitive Agreement On October 24, 2025 (the “Effective Date”), Littelfuse, Inc., a Delaware corporation (“Littelfuse” or the “Company”), entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with Basler Holdings, LLC (“Seller”), pursuant to which the Company has agreed to acquire all of the issued and outstanding membership interests of Basler Electric Company (“Basler”), as further described below. Transaction Overview On the terms and condi…

The information in Exhibits 99.1 and 99.2 shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, except as shall be expressly set forth by specific reference in such filing. Forward Looking Statements The statements in this current report on Form 8-K that are not historical facts, including statements with respect to the expected timetable for closing t…

Senior Vice President and General Manager, Semiconductor Business — Chad Marak: The departure of a Senior Vice President and General Manager is an orderly succession with a named successor (Dr. Karim Hamed) and standard severance terms, indicating a planned transition rather than a sudden loss or shock.

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On July 30, 2025, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter ended June 28,…

CFO — Abhishek Khandelwal: The filing discloses the departure of the sitting CFO, Meenal Sethna, and the external hire of Abhishek Khandelwal as her successor.

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On April 29, 2025, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter ended March 2…

Regulation FD Disclosure To supplement the information in the attached press release, the Company has also prepared a presentation, which will be available on the Company’s website at https://investor.littelfuse.com/events-and-presentations and is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K. The information contained in the press release and investor presentation attached to this Form 8-K includes forward-looking statements that are intended to be covered by the safe-ha…

The filing discloses the approval of new forms of equity award agreements for executive officers, which is a compensatory arrangement rather than a change in management personnel.

CFO — Meenal Sethna: The CFO is separating from the company with a future effective date and no immediate successor named, representing a significant loss of senior management.

of this Form 8-K and the Exhibits attached hereto shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and shall not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. On January 28, 2025, Littelfuse, Inc. (the “Company”) issued a press release announcing the results of its operations for the quarter and full ye…