Caris Life Sciences, Inc.

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our 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. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints, and that management is required to apply judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has 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), as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on such evaluation, our principal executive officer and principal financial officer have concluded that these disclosure controls and procedures were not effective at the reasonable assurance level as of September 30, 2025 due to the previously reported material weakness in our internal control over financial reporting pertaining to a lack of sufficient qualified accounting resources, including those with technical expertise necessary to account for and disclose accounting transactions which require complex calculations or thorough evaluation of the accounting literature.

Notwithstanding the material weakness in our internal controls over financial reporting as of September 30, 2025, management has concluded that the condensed consolidated financial statements included in this Form 10-Q present fairly, in all material respects, our financial position, results of operations and cash flows for the periods presented in conformity with accounting principles generally accepted in the United States.

Changes in Internal Control over Financial Reporting

During the quarter ended September 30, 2025, we continued our remediation efforts in connection with the identification of the material weakness discussed above. These remediation steps are ongoing and include the following:

•implementation of controls to enhance our review of significant accounting transactions and other new technical accounting and financial reporting issues and the preparation and review of accounting memoranda addressing these issues;

•implementation of controls to enable an effective and timely review of account analyses and account reconciliations; and

•continued hiring of additional accounting and finance resources with public company experience and expanding the capabilities of the existing accounting and financial personnel through continuous training and education in the accounting and reporting requirements under GAAP and SEC rules and regulations

While we took certain actions to remediate the material weakness, such remediation has not been fully evidenced. Accordingly, we continue to test our controls to assess whether our controls are operating effectively. We will not be able to conclude whether the steps we are taking will fully remediate these material weakness in our internal control over financial reporting until we have completed our remediation efforts and subsequent evaluation of their effectiveness. We may also conclude that additional measures may be required to remediate the material weaknesses in our internal control over financial reporting, which may necessitate additional implementation and evaluation time.

Other than the foregoing actions to remediate our material weakness, there was no change in our internal control over financial reporting identified during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.