0001967940-23-000064 144 1 20231215 20231215 SEMTECH CORP 0000088941 3674 952119684 DE 0128 144 33 001-06395 231490153 200 FLYNN ROAD CAMARILLO CA 93012-8790 8054982111 200 FLYNN ROAD CAMARILLO CA 93012-8790 Summers Sylvia 0001347095 144 200 FLYNN ROAD CAMARILLO CA 93012 144 1 primary_doc.xml UNITED STATES Form 144 Filer Information SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933 144: Issuer Information Name of Issuer SEMTECH CORP SEC File Number 001-06395 Address of Issuer 200 FLYNN ROAD CAMARILLO CALIFORNIA 93012-8790 Phone 8054982111 Name of Person for Whose Account the Summers Sylvia Securities are To Be Sold See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice. Relationship to Issuer 1. Director 144: Securities Information Title of the Number of Number of Class of Name and Shares or Aggregate Shares or Approximate Name the Record Securities To Address of the Other Market Other Units Date of Securities Be Sold Broker Units To Value Outstanding Sale Exchange Be Sold Piper Sandler & Co. 800 Nicollet #1 COMMON STOCK Mall 16,000 $366,080.00 64,280,000 12/15/2023 NASDAQ Minneapolis MINNESOTA 55414 144: Securities To Be Sold Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor: Nature of Name of Is Date Amount of Record Title of Date you Acquisition Person from this Donor Securities Date of Payment Nature of the Class Acquired Transaction Whom a Acquired Acquired Payment * Acquired Gift? Restricted #1 COMMON 01/04/2019 Stock Units Semtech ? — 16,000 12/15/2023 Cash STOCK and Stock Corporation Options * If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid. 144: Securities Sold During The Past 3 Months Nothing to Report ? 144: Remarks and Signature Remarks Date of Notice 12/15/2023 ATTENTION: The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date. Alex Johnson, a duly authorized Signature representative of Piper Sandler & Co Corporate & Venture Services FA, as attorney-in-fact for Silvia Couder ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)