Filed pursuant to Rule 497(e)

Registration Nos. 333-289817; 811-24116

Defiance China Memory ETF (CRAM)

(the “Fund”)

listed on The Nasdaq Stock Market, LLC

September 25, 2026

Supplement to the

Prospectus and Statement of Additional Information (“SAI”),

each dated August 29, 2026

Effective immediately, the section on the back cover page of the Prospectus entitled “Independent Registered Public Accounting Firm” is deleted and replaced in its entirety to read as follows:

Independent
Registered Public
Accounting Firm

Cohen & Company, Ltd.

1835 Market Street, Suite 310 Philadelphia

Pennsylvania 19103

Effective immediately, the section of the SAI entitled “Independent Registered Public Accounting Firm” is deleted and replaced in its entirety to read as follows:

Cohen & Company, Ltd., located at 1835 Market Street, Suite 310, Philadelphia, Pennsylvania 19103, serves as the independent registered public accounting firm for the Fund. Its services include auditing the Fund’s financial statements. Cohen & Co Advisory, LLC, an affiliate of Cohen & Company, Ltd., provides tax services as requested.

Please retain this Supplement for future reference.