Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549     FORM 8-K     CURRENT REPORT Pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 6, 2025     SEMTECH CORPORATION (Exact name of registrant as specified in its charter)       Delaware (State or other jurisdiction of incorporation)   001-06395   95-2119684 (Commission File Number)   (IRS Employer Identification No.)   200 Flynn Road   Camarillo , California   93012-8790 (Address of principal executive offices)   (Zip Code) 805 - 498-2111 (Registrant’s telephone number, including area code) Not applicable (Former name or former address, if changed since last report)     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Exchange Act:   Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock, par value $0.01 per share   SMTC   The Nasdaq Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐       Item 8.01 Other Events. On October 6, 2025, Semtech Corporation (the “Company”) issued a press release announcing its intent, subject to market and other conditions, to offer $350 million in aggregate principal amount of 0% convertible senior notes due 2030 (the “Notes”) in a private placement (the “Offering”) to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). The Company also announced that it intends to grant the initial purchasers of the Notes an option to purchase, for settlement by (and including) October 15, 2025, up to an additional $52.5 million aggregate principal amount of Notes. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. This report does not constitute an offer to sell, or a solicitation of an offer to buy, any of the Notes in the Offering or any other securities of the Company, and shall not constitute an offer, solicitation or sale of securities in any state in which the offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state. The Notes have not been registered under the Securities Act or any state securities law and may not be offered or sold in the United States absent registration or an applicable exemption from registration under the Securities Act and applicable state securities laws. Item 9.01 Financial Statements and Exhibits. (d) Exhibits   Exhibit No.    Description 99.1    Press release dated October 6, 2025 104    Cover Page Interactive Data File (embedded within the Inline XBRL document).   SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.       SEMTECH CORPORATION Date: October 6, 2025       /s/ Mark Lin     Name:   Mark Lin         Title:   Chief Financial Officer