Certification of No Change in Definitive Materials. (497j)

Dechert LLP

1900 K Street, N.W.

Washington, D.C. 20006

Telephone: (202) 261-3300

Fax: (202) 261-3333

May 17, 2013

VIA EDGAR

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re:

PIMCO Funds (the “Trust”)

(File Nos. 033-12113 and 811-05028)

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended (the “1933 Act”), we hereby certify on behalf of the Trust, that: (i) the forms of the Prospectuses and Statement of Additional Information that the Trust would have filed pursuant to Rule 497(c) under the 1933 Act do not differ from those contained in Post-Effective Amendment No. 246, which was filed on May 14, 2013, and (ii) the text of Post-Effective Amendment No. 246 was filed electronically on May 14, 2013.

Please do not hesitate to contact the undersigned at (202) 261-3464 if you have any questions regarding this certification.

Sincerely,

/s/ Adam T. Teufel

Adam T. Teufel