Investment Managers Series Trust

12/15/2025 | Press release | Distributed by Public on 12/15/2025 10:40

Prospectus by Investment Company (Form 497)

Robinson Opportunistic Income Fund

Class A Shares (RBNAX)

Class C Shares (RBNCX)

Class T Shares (RBNDX)

Institutional Class Shares (RBNNX)

A series of Investment Managers Series Trust (the "Trust")

Supplement dated December 15, 2025, to the currently effective

Prospectus, Statement of Additional Information ("SAI")

and Summary Prospectus

Important Notice Regarding Class T Shares

Based upon the recommendation of Liberty Street Advisors, Inc., the investment advisor to the Robinson Opportunistic Income Fund (the "Fund"), the Board of Trustees of the Trust has approved the termination of the Fund's Class T Shares, effective immediately. As a result, effective immediately, all references to the Fund's Class T Shares in the Prospectus, SAI and Summary Prospectus are deleted in their entirety. The Fund does not currently offer Class T Shares.

Please file this Supplement with your records.

Investment Managers Series Trust published this content on December 15, 2025, and is solely responsible for the information contained herein. Distributed via Edgar on December 15, 2025 at 16:40 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]