SEMTECH CORP

Disclosure Controls and Procedures

We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")), which are designed to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer ("CEO") and Chief Financial Officer ("CFO"), as appropriate to allow timely decisions regarding required disclosure. Our management, with the participation of our CEO and CFO, evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this Annual Report on Form 10-K. Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of January 26, 2025.

Management's Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Under the supervision and with the participation of our management, including our CEO and CFO, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework set forth in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (the "COSO framework"). Based on our evaluation under the COSO framework, our management has concluded that as of January 26, 2025, the Company’s internal control over financial reporting was effective to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Deloitte & Touche LLP, our independent registered public accounting firm, has audited our internal control over financial reporting as of January 26, 2025, as stated in their report included below.

Remediation of Previously Disclosed Material Weaknesses

We concluded that material weaknesses existed as of January 28, 2024 as previously disclosed in Part II, Item 9A, "Controls and Procedures" of our Annual Report on Form 10-K for the year ended January 28, 2024. We had identified a deficiency in a principle associated with the risk assessment component of the COSO framework related to the integration of Sierra Wireless, Inc. ("Sierra Wireless"), which the Company acquired on January 12, 2023. Specifically, the control deficiency constituted a material weakness relating to identifying and assessing changes in the business that could impact our system of internal control. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the annual or interim financial statements will not be prevented or detected on a timely basis.

The risk assessment material weakness contributed to other material weaknesses within our system of internal control over financial reporting at the control activity level, all of which were also associated with the Sierra Wireless business.

•We did not design and maintain effective controls to ensure that all manual journal entries were properly approved prior to being posted to the general ledger system, and certain individuals had the ability to both prepare, review and post manual journal entries to the general ledger.

•We did not design and maintain effective controls to ensure the timely collection and maintenance of documentation necessary to support claimed value added tax ("VAT") withholding exemptions in certain jurisdictions.

•We did not maintain adequate evidence of the review of information used to determine the inventory excess and obsolescence reserves.

In addition, we did not maintain adequate evidence of our review of the operating forecasts used in the preparation of the financial statements.

Subsequently, the Company has taken corrective action to remediate and address the control deficiencies that aggregated to the noted material weaknesses. Remediation measures included the following:

•We enhanced our risk assessment process to ensure it is sufficiently robust to identify and analyze significant changes in the business, including the impact of these changes on the identification of risks and the internal control structure.

•We migrated the Sierra Wireless enterprise resource planning system to existing Semtech financial systems. These migration activities facilitated our use of existing policies, processes, and internal controls, including with respect to manual journal entry posting, VAT documentation and inventory excess and obsolescence reserves.

•We updated our policies and educated our personnel to properly document and maintain evidence of review of operating forecasts and information used in preparation of the financial statements.

Management has determined, through its current year testing, that the controls have been designed and implemented effectively and that these controls operated effectively for a sufficient period of time. Based on the remediation measures above, management concluded that the previously disclosed material weaknesses have been remediated as of January 26, 2025.

Changes in Internal Controls

Other than the remediation measures described above, there were no changes to our internal control over financial reporting that occurred during the quarter ended January 26, 2025, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

The Board of Directors and Stockholders of Semtech Corporation

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Semtech Corporation and subsidiaries (the "Company") as of January 26, 2025, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of January 26, 2025, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended January 26, 2025, of the Company and our report dated March 25, 2025, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Los Angeles, California

March 25, 2025