INNOSPEC INC

Evaluation of Disclosure Controls and Procedures

On December 8, 2023, the Company acquired QGP Química Geral S.A. (“QGP”). As permitted by related SEC staff interpretive guidance for newly acquired businesses, management has excluded QGP from its assessment of the effectiveness of the Company’s internal control over financial reporting. We are currently in the process of implementing our internal control structure over the acquired operations and expect that this effort will be completed in 2024.

Based on an evaluation carried out as of the end of the period covered by this report, under the supervision and with the participation of our management, our Chief Executive Officer and our Chief Financial Officer concluded that the Company’s “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934) were effective as of March 31, 2024, to provide reasonable assurance that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms and (ii) accumulated and communicated to the Company’s management, including its principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes to our internal control over financial reporting which were identified in connection with the evaluation required by paragraph (d) of Rules 13a-15 and 15d-15 under the Securities Exchange Act of 1934, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.