SCHEDULE 13G 0001801142 XXXXXXXX LIVE Common stock, no par value 12/31/2025 0001145255 Hennessy Advisors, Inc. 425885100 7250 Redwood Boulevard Suite 200 Novato CA 94945 Rule 13d-1(b) Seaport Global Asset Management LLC b NY 0 409015 0 409015 409015 N 5.2 IA OO Stephen C. Smith b X1 0 409015 0 409015 409015 N 5.2 IN HC Hennessy Advisors, Inc. 7250 Redwood Boulevard, Suite 200, Novato, CA 94945 This names of the persons filing this report (collectively, the "Reporting Persons") with respect to shares of Common Stock, no par value (the "Common Stock") of Hennessy Advisors, Inc. (the "Issuer") are: (i) Seaport Global Asset Management LLC ("Seaport") and (ii) Stephen C. Smith. The address of the principal business office of each of the Reporting Persons is 360 Madison Avenue, 23rd Floor, New York, NY 10017. Seaport is a New York limited liability corporation. Mr. Smith is a United States citizen. N IA HC As of December 31, 2025, Seaport beneficially owned 409,015 shares of Common Stock. Shares of Common Stock reported herein represent shares held by investment advisory clients of and trusts managed by of Seaport. Mr. Smith is the manager of Seaport. The information set forth on Row 11 of the cover pages to this Schedule 13G is incorporated herein by reference. The percentages are calculated based upon 7,891,917 shares of Common Stock issued and outstanding as of December 8, 2025, as reported in the Issuer's Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on December 10, 2025. The information set forth on Row 5 of the cover pages to this Schedule 13G is incorporated herein by reference. The information set forth on Row 6 of the cover pages to this Schedule 13G is incorporated herein by reference. The information set forth on Row 7 of the cover pages to this Schedule 13G is incorporated herein by reference. The information set forth on Row 8 of the cover pages to this Schedule 13G is incorporated herein by reference. 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 acquired and are held in the ordinary course of business and 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 99.1 Joint Filing Agreement Seaport Global Asset Management LLC /s/ Stephen C. Smith 02/03/2026 Stephen C. Smith /s/ Stephen C. Smith 02/03/2026