First Trust Exchange Traded Fund III

06/12/2026 | Press release | Distributed by Public on 06/12/2026 08:46

Prospectus by Investment Company (Form 497)

Rule 497(e)
Registration Nos. 333-176976 and 811-22245

First Trust Exchange-Traded Fund III

(the "Trust")

FIRST TRUST MERGER ARBITRAGE ETF

(the "Fund")

Supplement To the Fund's Prospectus, Summary Prospectus
and Statement of Additional Information

June 12, 2026

The changes to the Fund's investment strategies, name and other related matters, previously announced on January 27, 2026, are expected to occur on or around June 23, 2026.

Please Keep this Supplement with your Fund Prospectus, Summary Prospectus

and Statement of Additional Information for Future Reference

First Trust Exchange Traded Fund III published this content on June 12, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on June 12, 2026 at 14:46 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 If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]