Compass Therapeutics, Inc. 10-Q

Item 5. Other Information. During the three-month period ended March 31, 2026, none of our directors or officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted, terminated or modified a Rule 10b5-1 trading arrangement or any “non-Rule 10b5-1 trading agreement” (as defined in Item 408(c) of Regulation S-K). Item 6. Exhibits. Exhibit Number Description 3.1 Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.2 to the Current Report on Form 8-K filed with the SEC on June 23, 2020). 3.2 Amended and Restated Bylaws (incorporated by reference to Exhibit 3.3 to the Current Report on Form 8-K filed with the SEC on June 23, 2020). 4.1 Form of Pre-Funded Warrant (incorporated by reference to Exhibit 4.1 to the Current Report on Form 8-K filed with the SEC on August 13, 2025). 10.1# Employment Agreement between Compass Therapeutics, Inc. and Arjun Prasad, dated January 1, 2026 (incorporated by reference to Exhibit 10.17 to the Annual Report on Form 10-K filed with the SEC on March 5, 2026. 10.2# Employment Agreement between Compass Therapeutics, Inc. and Cynthia Sirard, dated January 1, 2026 (incorporated by reference to Exhibit 10.18 to the Annual Report on Form 10-K filed with the SEC on March 5, 2026. 31.2* Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 32.1** Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 32.2** Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. 101.INS Inline XBRL Instance Document – the instance document does not appear in Interactive Data File because its XBRL tags are embedded within the Inline XBRL Document 101.SCH Inline XBRL Taxonomy Extension Schema Document 101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document 101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document 101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document 101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document 104*  Cover Page Interactive Data File (embedded within the Inline XBRL document) * Filed herewith. ** This exhibit is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall such exhibits be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act or the Exchange Act, except as otherwise stated in such filing. # Indicates a management contract or any compensatory plan, contract or arrangement. 23 SIGNATURES Pursuant to the requirements of the Exchange Act, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. Compass Therapeutics, Inc. Date: May 5, 2026 By: /s/ Thomas Schuetz Thomas Schuetz Principal Executive Officer Date: May 5, 2026 By: /s/ Barry Shin Barry Shin Principal Financial Officer Date: May 5, 2026 By: /s/ Neil Lerner Neil Lerner Principal Accounting Officer 24