INNOSPEC INC.

Evaluation of Disclosure Controls and Procedures

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 June 30, 2026, 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

The Company is continuously seeking to improve the efficiency and effectiveness of its operations and of its internal control over financial reporting. This is intended to result in refinements to processes throughout the Company.

As previously disclosed, we have been developing a new information system platform which began in 2022. The new platform provider is well established in the market. The implementation has been a phased, risk-managed, site deployment following a multistage user acceptance program and the implementation is now complete. In connection with this implementation, the Company has updated its internal controls over financial reporting, as necessary, to accommodate modifications to its business processes and accounting procedures.

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.