Coherus Oncology, Inc.

Evaluation of Effectiveness of Disclosure Controls and Procedures

We carried out an evaluation, under the supervision of our President and Chief Executive Officer and our Chief Financial Officer, and evaluated the effectiveness of our disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered by this Quarterly Report on Form 10-Q.

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our Exchange Act reports 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, principal financial officer and principal accounting officer, as appropriate, to allow for timely decisions regarding required disclosure.

We intend to review and evaluate the design and effectiveness of our disclosure controls and procedures on an ongoing basis and to correct any material deficiencies that we may discover. Our goal is to ensure that our management has timely access to material information that could affect our business. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Based on this evaluation, and as a result of the material weakness described below, our President and Chief Executive Officer and our Chief Financial Officer have concluded that, as of the end of the period covered by this Quarterly Report on Form 10-Q, our disclosure controls and procedures were not effective at a reasonable assurance level. Notwithstanding this material weakness, management concluded the condensed consolidated financial statements included in this report present fairly, in all material respects, our financial condition, results of operations and cash flows for the periods covered by this report.

Material Weakness in Internal Control over Financial Reporting

A material weakness is a deficiency, or combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of a company’s annual or interim financial statements will not be detected or prevented on a timely basis.

During the year ended December 31, 2024, we identified a material weakness in the operating effectiveness of our procedures related to documentation and review of certain inventory account reconciliations. The lack of sufficient evidence of the review performed over these accounting records did not allow for the testing and validation that the relevant internal controls operated, and thus it resulted in the material weakness. The material weakness related to documentation and did not result in a misstatement with respect to our financial statements included in the Form 10-K for the year ended December 31, 2024.

Management’s Remediation Measures

We have been taking steps to remediate this material weakness and to strengthen our internal control over financial reporting. The remediation measures include additional training and enhancement of our documentation and retention procedures, particularly as they relate to our inventory account reconciliations. However, the deficient inventory account reconciliations control was decommissioned concurrent with the UDENYCA Sale on April 11, 2025, leaving no opportunity to formally retest the operating effectiveness of the control during the current period.

Changes in Internal Control Over Financial Reporting.

Except for the material weakness noted above, there has been no change in the Company's internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) that occurred during the quarter ended June 30, 2025 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.