April 28, 2010 

via EDGAR 

U.S. Securities and Exchange Commission 

100 F Street, NE 

Washington, DC 20549 

Re:    Principal Funds, Inc. 

         File No. 333-161535 

         Application for Withdrawal Pursuant to Rule 477 

Dear Sir or Madam: 

Pursuant to Rule 477(a) of the Securities Act of 1933, as amended, Principal Funds, Inc. (the 

"Company") hereby respectfully applies for the withdrawal of the above-referenced registration 

statement on Form N-14 filed with the Securities and Exchange Commission ("SEC") on 

August 25, 2009 (Accession No:0000898745-09-000410 )(the “Registration Statement”). 

The Registration Statement was filed with respect to proposed reorganizations relating to certain 

series of the Company. The Company has determined not to proceed with the reorganizations 

and wishes to withdraw the Registration Statement. There were no securities sold or issued 

pursuant to the Registration Statement. 

The Company submits that withdrawal of the Registration Statement is consistent with the public 

interest and the protection of investors. 

We appreciate your assistance in this matter. If you have any questions regarding this matter, 

please contact the undersigned at (515) 235-9238. 

Very truly yours, 

 /s/ Adam U. Shaikh

Adam U. Shaikh 

Assistant Counsel