Filed pursuant to Rule 497(j)
Registration Nos. 333-174332 and 811-22559

Chapman and Cutler LLP 320 South Canal Street, 27th Floor Chicago, Illinois 60606   T 312.845.3000 F 312.701.2361 www.chapman.com

September 23, 2026

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Ladies and Gentlemen:

On behalf of First Trust Exchange-Traded Fund IV (the “Registrant”), in accordance with the provisions of Rule 497(j) of Regulation C under the Securities Act of 1933, as amended, (the “Securities Act”), this letter serves to certify that the most recent amendment to the Registration Statement on Form N-1A (the “Registration Statement”) of the Registrant does not differ from that which would have been filed pursuant to Rule 497(c) of the Securities Act. The Registration Statement relates to FT Vest GOOG & Target Income ETF, a series of the Registrant. Post-Effective Amendment No. 495, which was the most recent amendment to the Registration Statement, was filed electronically with the Securities and Exchange Commission on September 11, 2026.

If you have any questions or comments, please telephone the undersigned at (312) 845-3484.

Enclosures