INSIGHT ENTERPRISES INC

(a)Management’s Annual 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 Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)). Our management, including our Chief Executive Officer and Chief Financial Officer, conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2023. In making this assessment, our management used the criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). Management has concluded that the Company maintained effective internal control over financial reporting as of December 31, 2023, based on the criteria established in COSO’s Internal Control – Integrated Framework (2013). We completed the acquisition of SADA on December 1, 2023. As permitted under SEC guidance, management’s assessment as of December 31, 2023 did not include an assessment of the effectiveness of internal control over financial reporting of SADA, which constituted approximately 15% of the Company's total assets as of December 31, 2023 and less than 1% of the Company's consolidated net sales for the year ended December 31, 2023.

KPMG LLP, the independent registered public accounting firm that audited the Consolidated Financial Statements in Part II, Item 8 of this report, has issued an attestation report on the Company’s internal control over financial reporting as of December 31, 2023.

(b)Changes in Internal Control Over Financial Reporting

Except as described below, there was no change in our internal control over financial reporting during the quarter ended December 31, 2023 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

As noted above, on December 1, 2023 we completed the acquisition of SADA. We are currently integrating SADA into our control environment. In executing this integration, we are analyzing, evaluating, and where necessary, making changes in controls and procedures related to the SADA business, which is expected to be completed in the year ended December 31, 2024.

(c)Disclosure Controls and Procedures

We maintain disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). Our Chief Executive Officer and Chief Financial Officer, as of the end of the period covered by this report, evaluated the effectiveness of our disclosure controls and procedures and determined that as of December 31, 2023 our disclosure controls and procedures were effective to ensure that information required to be disclosed by us in reports that 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 and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

(d)Inherent Limitations of Disclosure Controls and Internal Control Over Financial Reporting

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