SOLIGENIX, INC. — Major Shareholding Notification 2025

Oct 1, 2025

xml version="1.0" encoding="UTF-8"? SCHEDULE 13G Field: Pseudo-Tag; ID: Name; Data: INTRACOASTAL CAPITAL, LLC 0001646799 XXXXXXXX LIVE Common Stock, par value $0.001 per share 09/25/2025 0000812796 Soligenix, Inc. 834223604 29 Emmons Drive, Suite B-10, Princeton, NJ 08540 Rule 13d-1(c) Mitchell P. Kopin X1 0.00 446408.00 0.00 446408.00 446408.00 N 4.99 HC IN Daniel B. Asher X1 0.00 446408.00 0.00 446408.00 446408.00 N 4.99 HC IN INTRACOASTAL CAPITAL, LLC DE 0.00 446408.00 0.00 446408.00 446408.00 N 4.99 OO Soligenix, Inc. 29 Emmons Drive, Suite B-10, Princeton, NJ 08540 This Schedule 13G is being filed on behalf of (i) Mitchell P. Kopin, an individual ("Mr. Kopin"), (ii) Daniel B. Asher, an individual ("Mr. Asher") and (iii) Intracoastal Capital LLC, a Delaware limited liability company ("Intracoastal" and together with Mr. Kopin and Mr. Asher, collectively the "Reporting Persons"). The principal business office of Mr. Kopin and Intracoastal is 245 Palm Trail, Delray Beach, Florida 33483. The principal business office of Mr. Asher is 1011 Lake Street, Suite 311, Oak Park, Illinois 60301. Mr. Kopin is a citizen of the United States of America. Mr. Asher is a citizen of the United States of America. Intracoastal is a Delaware limited liability company. Y (i) Immediately following the execution of the Securities Purchase Agreement with the Issuer on September 25, 2025 (the "SPA") (as disclosed in the Form 8-K filed by the Issuer with the Securities and Exchange Commission on September 29, 2025), each of the Reporting Persons may have been deemed to have beneficial ownership of 477,865 shares of Common Stock, which consisted of (i) 425,000 shares of Common Stock to be issued to Intracoastal at the closing of the transaction contemplated by the SPA and (ii) 52,865 shares of Common Stock issuable upon exercise of a warrant to be issued to Intracoastal at the closing of the transaction contemplated by the SPA ("Intracoastal Warrant 1"), and all such shares of Common Stock represent beneficial ownership of approximately 9.99% of the Common Stock, based on (1) 4,305,570 shares of Common Stock outstanding as of September 25, 2025, as reported by the Issuer and (2) 425,000 shares of Common Stock to be issued to Intracoastal at the closing of the transaction contemplated by the SPA and (3) 52,865 shares of Common Stock issuable upon exercise of Intracoastal Warrant 1. The foregoing excludes (I) 77,135 shares of Common Stock issuable upon exercise of Intracoastal Warrant 1 because Intracoastal Warrant 1 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 1 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 0.99% of the Common Stock, (II) 555,000 shares of Common Stock issuable upon exercise of a second warrant to be issued to Intracoastal at the closing of the transaction contemplated by the SPA ("Intracoastal Warrant 2") because Intracoastal Warrant 2 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 2 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock and (III) 3,125 shares of Common Stock issuable upon exercise of a warrant held by Intracoastal ("Intracoastal Warrant 3") because Intracoastal Warrant 3 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 3 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock. Without such blocker provisions, each of the Reporting Persons may have been deemed to have beneficial ownership of 1,113,125 shares of Common Stock. (ii) As of the close of business on October 1, 2025, each of the Reporting Persons may have been deemed to have beneficial ownership of 446,408 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2, and all such shares of Common Stock represent beneficial ownership of approximately 4.99% of the Common Stock, based on (1) 4,305,570 shares of Common Stock outstanding as of September 25, 2025, as reported by the Issuer, plus (2) 4,064,080 shares of Common Stock issued at the closing of the transaction contemplated by the SPA, (3) 130,000 shares of Common Stock issued to Intracoastal upon exercise of Intracoastal Warrant 1 and (4) 446,408 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2. The foregoing excludes (I) 108,592 shares of Common Stock issuable upon exercise of Intracoastal Warrant 2 because Intracoastal Warrant 2 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 2 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock and (II) 3,125 shares of Common Stock issuable upon exercise of Intracoastal Warrant 3 because Intracoastal Warrant 3 contains a blocker provision under which the holder thereof does not have the right to exercise Intracoastal Warrant 3 to the extent (but only to the extent) that such exercise would result in beneficial ownership by the holder thereof, together with the holder's affiliates, and any other persons acting as a group together with the holder or any of the holder's affiliates, of more than 4.99% of the Common Stock. Without such blocker provisions, each of the Reporting Persons may have been deemed to have beneficial ownership of 558,125 shares of Common Stock. 4.99 0 446,408 0 446,408 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit 1 - Joint Filing Agreement Mitchell P. Kopin /s/ Mitchell P. Kopin Mitchell P. Kopin 10/01/2025 Daniel B. Asher /s/ Daniel B. Asher Daniel B. Asher 10/01/2025 INTRACOASTAL CAPITAL, LLC /s/ Mitchell P. Kopin Mitchell P. Kopin, Manager 10/01/2025