July 6, 2026
U.S. Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549-3628
| Re: | Washington Mutual Investors Fund |
| File Nos. 002-11051 and 811-00604 |
Dear Sir or Madam:
Pursuant to Rule 497(j), I hereby certify that no changes have been made to the forms of Statement of Additional Information since the electronic filing on June 30, 2026 of Registrant’s Post-Effective Amendment No. 154 under the Securities Act of 1933 and Amendment No. 82 under the Investment Company Act of 1940, as amended.
Sincerely,
/s/ Michael R. Tom
Michael R. Tom
Secretary