UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _________________________ FORM 10-Q _________________________ (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ______________ to ______________ Commission File Number: 001-39799 _________________________ Certara, ...