Certara, Inc.

To the Stockholders and the Board of Directors of Certara, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Certara, Inc. and Subsidiaries (the Company) as of December 31, 2025 and 2024, the related consolidated statements of operations and comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes to the consolidated financial statements (collectively, the financial statements). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013, and our report dated February 26, 2026, expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) related to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which it relates.

Revenue Recognition on the Company’s Fixed Price Contract Revenue

As described in Note 2 (q) to the consolidated financial statements, the Company performs professional services under fixed price contracts with the associated revenue recognized over time. For fixed price revenue contracts recognized over time, management utilizes the input method to measure estimated progress to completion.

We identified revenue recognition for fixed price contracts as a critical audit matter. The principal consideration for our determination that revenue recognition for fixed price contracts was a critical audit matter is that the measure of progress towards completion is based upon the value of work incurred to date as a percentage of the total estimated value of work and utilizes assumptions for future value of work to complete the performance obligations, and those assumptions have significant estimation uncertainty. A significant change in the assumptions could affect both the profitability of the contract and the amount of revenue and profit recognized in an accounting period. Given these factors, the related audit effort in evaluating management’s judgments in determining the revenue recognition for fixed price contracts was challenging, subjective, and complex and required a high degree of auditor judgment.

Our audit procedures related to testing the existence, accuracy and completeness of the Company’s fixed price contract revenue included the following, among others:

•We obtained an understanding of the relevant controls related to the existence, accuracy and completeness of fixed price contract revenue and tested such controls for design and operating effectiveness, including management review controls.

•We evaluated the reasonableness of management’s process of estimating the total value of work associated with fixed price contracts by comparing the total value of work incurred under completed contracts to the total value of work estimated by management at the inception of the customer agreement.

•We selected a sample of customer contracts and performed the following procedures:

–We reviewed the terms in the customer contract and evaluated the appropriateness of management’s accounting policy application along with their use of estimates, to determine the revenue recognition conclusions are reasonable.

–We evaluated management’s estimated budget for each selection and compared the actual value of work incurred to the amount recognized.

–We assessed the progress towards completion by performing inquiries of key financial and operational executives to evaluate the progress to date and factors impacting the estimated total contract value of work expected at completion as well as attending certain regular operational meetings to observe discussions over progress and total estimated remaining value of work. We also held discussions with certain project leads to confirm the budgeting process and assumptions used in developing the original budget and subsequent modifications.

/s/RSM US LLP

We have served as the Company's auditor since 2022.

Blue Bell, Pennsylvania

February 26, 2026

To the Stockholders and the Board of Directors of Certara, Inc.

Opinion on the Internal Control Over Financial Reporting

We have audited Certara, Inc. and Subsidiaries’ (the Company) internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the December 31, 2025 consolidated financial statements of the Company and our report dated February 26, 2026, expressed an unqualified opinion.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting in the accompanying Management’s Annual Report on Internal Controls over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company's 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.

/s/ RSM US LLP

Blue Bell, Pennsylvania

February 26, 2026