Filed pursuant to Rule 497(e)

Registration No. 333-271700

THEMES ETF TRUST

Leverage Shares 2X Long FORM Daily ETF

Supplement dated June 23, 2026, to the Fund’s

Prospectus and Statement of Additional Information, dated May 11, 2026 and

the Summary Prospectus dated June 17, 2026

References to the ticker symbol of the Leverage Shares 2X Long FORM Daily ETF (the “Fund”) are hereby changed from FOML to FOMG. Shareholders do not need to take any action in connection with this update. 

SHAREHOLDERS SHOULD RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE