FENNEC PHARMACEUTICALS INC. 10-Q

Item 5. Other Information. Rosty Raykov , a current member of our Board of Directors , adopted a trading arrangement on September 19, 2025 , which is intended to satisfy the Rule 10b5-1 affirmative defense. This trading arrangement covers the disposition of up to 109,184 shares of the Company’s common shares, and will terminate on June 9, 2026 , unless earlier terminated in accordance with its terms. No additional directors or officers informed us of the adoption, modification or termination of a “ Rule 10b5-1 trading arrangement” or “non- Rule 10b5-1 trading arrangement ,” as those terms are defined in Regulation S-K, Item 408. On November 13, 2025, we issued a press release announcing our financial results for the quarter ended September 30, 2025. A copy of the news release is attached to this Quarterly Report as Exhibit 99.1. The press release is being furnished and shall not be deemed to be filed for the purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), or incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, unless such subsequent filing specifically references the press release. ​ Item 6. Exhibits ​ Exhibit No. Description ​ ​ ​ 31.1 ​ Certification of Chief Executive Officer of the Company in accordance with Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith). ​ 31.2 ​ Certification of Chief Financial Officer of the Company in accordance with Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith). ​ 35 Table of Contents 32.1 ​ Certification of Chief Executive Officer and Chief Financial Officer of the Company in accordance with Section 906 of the Sarbanes-Oxley Act of 2002 (filed herewith). ​ 99.1 ​ Press Release for Quarter September 30, 2025 (filed herewith). ​ ​ ​ 101.INS* ​ Inline XBRL Instance 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 (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101) ​ ​ 36 Table of Contents SIGNATURES Pursuant to 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. ​ Fennec Pharmaceuticals Inc. Date: November 13, 2025 By: /s/ Jeff Hackman Jeff Hackman Chief Executive Officer (principal executive officer) Date: November 13, 2025 By: /s/ Robert Andrade Robert Andrade Chief Financial Officer (principal financial and chief accounting officer) ​ ​ ​ ​ 37