Erasca, Inc. 10-Q

Item 5 . Other Information. Rule 10b5-1 Trading Plans During the three months ended March 31, 2026 , none of our officers (as defined in Rule 16a–1(f)) or directors adopted , materially modified or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as each such term is defined in Item 408 of Regulation S-K. 35 Item 6. Exhibits. Exhibit Number Exhibit Description Incorporated by Reference Filed Herewith Form Date Number 3.1 Amended and Restated Certificate of Incorporation of Erasca, Inc. 8-K 7/20/2021 3.1 3.2 Amended and Restated Bylaws of Erasca, Inc. 8-K 7/20/2021 3.2 4.1 Specimen stock certificate evidencing the shares of common stock S-1 6/25/2021 4.1 4.2 Amended and Restated Stockholders Agreement, dated April 15, 2020, by and among the Registrant and certain of its stockholders S-1 6/25/2021 4.2 10.1 Underwriting Agreement, dated January 21, 2026, by and among the Registrant and J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Jefferies LLC and Evercore Group L.L.C., as representatives of the several underwriters named therein 8-K 1/22/2026 1.1 31.1 Certification of Chief Executive Officer of Erasca, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 X 31.2 Certification of Chief Financial Officer of Erasca, Inc., as required by Rule 13a-14(a) or Rule 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 X 32.1* Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 X 32.2* Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 X 101.INS Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document. X 101.SCH Inline XBRL Taxonomy Extension Schema Document X 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) X * This certification is deemed not filed for purpose of section 18 of the Exchange Act or otherwise subject to the liability of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act. 36 SIG NATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Erasca, Inc. Date: May 11, 2026 By: /s/ Jonathan E. Lim, M.D. Jonathan E. Lim, M.D. Chairman, Chief Executive Officer and Co-Founder (Principal Executive Officer) Date: May 11, 2026 By: /s/ David M. Chacko, M.D. David M. Chacko, M.D. Chief Financial Officer and Chief Business Officer (Principal Financial and Accounting Officer) 37