Amprius Technologies Inc

Evaluation of Disclosure Controls and Procedures

Our management, with the participation and supervision of our Chief Executive Officer (“CEO”) and our Chief Financial Officer (“CFO”), have evaluated the effectiveness of our 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”)) as of the end of the period covered by this Quarterly Report on Form 10-Q. Our disclosure controls and procedures are designed to ensure that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including our CEO and our CFO, as appropriate, to allow timely decisions regarding required disclosure. Based on such evaluation, our CEO and our CFO have concluded that our disclosure controls and procedures were not effective because of our previously identified material weaknesses in internal controls over financial reporting, as described further below, that have not been remediated as of March 31, 2024. However, based on additional procedures and post-closing review that we performed, management concluded that the condensed consolidated financial statements included in this Quarterly Report on Form 10-Q present fairly, in all material respects, our consolidated financial position, consolidated results of operations, and consolidated cash flows as of and for the years presented, in conformity with U.S. GAAP.

Remediation Plan for Previously Identified Material Weaknesses

The previously identified material weaknesses pertained to (i) inadequate design and maintenance of internal controls over our financial reporting and close activities, and (ii) inadequate segregation of duties. More specifically, the material weaknesses were attributed to our inadequate controls on our implementation, use and monitoring of certain application systems that were implemented in 2023, which resulted in inadequate review of certain transactions. Our management is in the process of implementing the following:

•Enhancing our control activities on our application systems by removing any inappropriate level of access of our employees, periodically reviewing their access, documenting our review of their access, and ensuring that no one from the accounting and finance department can add or modify users in those application systems;

•Continuing to enhance our internal controls over the recording of transactions entered into our accounting system, whether automated or manually entered, by ensuring that they are properly reviewed and approved by the appropriate level of personnel; and

•Engaging external specialists to assist us in reviewing, testing and monitoring our existing internal controls on a periodic basis, and assist us in designing and implementing new internal controls when a new process is implemented, such as an implementation of a relevant application system.

Our management believes that the remediation efforts described above will enable us to address the material weaknesses in a timely manner, maintain a properly designed and effective system of internal controls over financial reporting, and provide appropriate segregation of duties. Our remediation efforts are in progress. We will not be able to demonstrate that the material weaknesses have been fully remediated, or that our controls are operating effectively, until we complete our remediation efforts. We will continue to evaluate the effectiveness of our internal control over financial reporting and will continue to make changes that we believe will strengthen our internal control over financial reporting to ensure that our financial statements continue to be fairly stated in all material respects.

Changes in Internal Control Over Financial Reporting

Except for the activities taken related to the remediation of the material weaknesses described above, there were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rules

13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the quarter ended March 31, 2024 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.