Passage BIO, Inc. 10-Q

Item 5. Other Information. 10b5-1 Trading Plans During the three months ended June 30, 2025, n o n e of our directors or officers, as defined in Rule 16a-1(f), informed us of the adoption, modification or termination of a “Rule 10b5-1 trading agreement” or “non-Rule 10b-51 trading agreement,” as those terms are defined in Regulations S-K, Item 408. ​ 95 Table of Contents Item 6. Exhibits. The exhibits filed or furnished as part of this Quarterly Report on Form 10-Q are set forth on the Exhibit Index below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Exhibit Number Description Form File No. Exhibit Filing Date Filed/Furnished Herewith ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10.1˄† ​ Amendment to the Exclusive License Agreement (GM1), dated May 7,2025, by and between the Registrant and Gemma Biotherapeutics, Inc. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10.2˄ ​ Amendment to the Exclusive License Agreement (Krabbe), dated May 7, 2025, by and between the Registrant and Gemma Biotherapeutics, Inc. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10.3˄ ​ Amendment to the Exclusive License Agreement (MLD), dated May 7, 2025, by and between the Registrant and Gemma Biotherapeutics, Inc. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 31.1 ​ Certification of Principal Executive 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. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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. ​ ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 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. ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 101.INS ​ Inline XBRL Instance Document ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 101.SCH ​ Inline XBRL Taxonomy Extension Schema Document ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 101.CAL ​ Inline XBRL Taxonomy Extension Calculation Linkbase Document ​ ​ ​ ​ ​ ​ ​ X ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 101.DEF ​ Inline XBRL Taxonomy Extension ​ ​ ​ ​ ​ ​ ​ X ​ ​ Definition Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 96 Table of Contents 101.LAB ​ Inline XBRL Taxonomy Extension Label Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ X 101.PRE ​ Inline XBRL Taxonomy Extension Presentation Linkbase Document ​ ​ ​ ​ ​ ​ ​ ​ X 104 ​ Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) ​ ​ ​ ​ ​ ​ ​ X ​ ad ​ ​ ​ ​ ​ ​ ˄ ​ Registrant has omitted schedules and exhibits pursuant to Item 601(a)(5) of Regulation S-K. The Registrant agrees to furnish supplementally a copy of the omitted schedules and exhibits to the SEC upon request. † ​ Registrant has omitted portions of this exhibit as permitted under Item 601(b)(10) of Regulation S-K. * ​ This certification is deemed not filed for purposes 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. ​ ​ ​ ​ 97 Table of Contents ​ SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. ​ ​ ​ ​ ​ ​ PASSAGE BIO, INC. ​ ​ ​ ​ Date: August 12, 2025 ​ By: /s/ William Chou, M.D. ​ ​ ​ William Chou, M.D. ​ ​ ​ President and Chief Executive Officer ​ ​ ​ ​ ​ ​ Date: August 12, 2025 ​ By: /s/ Kathleen Borthwick ​ ​ ​ Kathleen Borthwick ​ ​ ​ Chief Financial Officer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 98