Tidal Trust III

234 West Florida Street, Suite 700

Milwaukee, WI 53204

July 2, 2026

VIA EDGAR TRANSMISSION

U.S. Securities and Exchange Commission (the “Commission”)

Division of Investment Management

100 F Street, N.E.

Washington, DC 20549

To the Commission:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, and the regulations thereunder, the Trust on behalf of its series, the VistaShares Target 15 Berkshire Select Income ETF, VistaShares Target 15 USA Momentum Income ETF, VistaShares Target 15 USA Value Income ETF, VistaShares Target 15 USA Quality Income ETF, and VistaShares Target 15 USA Low Volatility Income ETF, hereby certifies that the forms of Prospectus and Statement of Additional Information that would have been filed under Rule 497(b) or (c) would not have differed from that contained in the most recent amendment effective June 29, 2026, and filed electronically as Post-Effective Amendment No. 195 to the Trust’s Registration Statement on Form N-1A on June 25, 2026.

If you have any questions or require further information, please contact Michael Pellegrino at (262) 318-8442 or mpellegrino@tidalfg.com.

Sincerely,

/s/ Michael Pellegrino

Michael Pellegrino

General Counsel

Tidal Investments LLC, on behalf of Tidal Trust III