ROGERS CORP

EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES

We conducted, with the participation of our Principal Executive Officer and Principal Financial Officer, an evaluation of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d- 15(e) under the Exchange Act, as of December 31, 2025. Our disclosure controls and procedures are designed (i) to ensure that information required to be disclosed by us in the 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 (ii) to ensure that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our Principal Executive Officer and Principal Financial Officer, as appropriate to allow timely decisions regarding required disclosure. Based on their evaluation, our Principal Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures were effective as of December 31, 2025.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

We are in the process of a multi-year implementation of a new global ERP system, which will replace our existing operating and financial systems. The implementation is expected to occur in phases over the next several years. During the first quarter of 2025, we completed the implementation of our new ERP system for one of our manufacturing sites. The portion of the transition to the new ERP system that we have completed to date did not result in material changes in our internal control over financial reporting. However, as the next phases of the updated processes are rolled out in connection with the ERP implementation, we will give appropriate consideration to whether these process changes necessitate changes in the design of and the testing for effectiveness of internal controls over financial reporting.

There were no changes in the Company’s internal control over financial reporting during the fourth quarter of the fiscal year ended December 31, 2025 that have materially affected or are reasonably likely to materially affect our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act.

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Our internal control over financial reporting was designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our financial statements for external purposes in accordance with U.S. GAAP. Our internal control over financial reporting includes those policies and procedures that:

•pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets;

•provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S. GAAP, and that receipts and expenditures are being made only in accordance with authorizations of our management and directors; and

•provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our 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.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2025. In making its assessment of internal control over financial reporting, management used the criteria issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework(2013). Based on the results of this assessment, management, including our Chief Executive Officer and our Chief Financial Officer, has concluded that, as of December 31, 2025, our internal control over financial reporting was effective.

The Company’s independent registered public accounting firm, PricewaterhouseCoopers, LLP, has audited the effectiveness of the Company’s internal control over financial reporting as of December 31, 2025, as stated in their report included under “Item 8. Financial Statements and Supplementary Data.”