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SECURITIES AND EXCHANGE COMMISSION
 
Washington, D.C. 20549
 
FORM 8-K
 
CURRENT REPORT
 
 
Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
 
Date of Report: December 10, 2008
(Date of earliest event reported)
 
 
PRINCIPAL FINANCIAL GROUP, INC.
(Exact name of registrant as specified in its charter)
 
 
    Delaware    1-16725    42-1520346 
    (State or other jurisdiction    (Commission file number)    (I.R.S. Employer 
    of incorporation)        Identification Number) 
 
711 High Street, Des Moines, Iowa 50392
(Address of principal executive offices)
 
(515) 247-5111
(Registrant’s telephone number, including area code)
 
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the 
registrant under any of the following provisions:     
 
[ ]       Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) 
[ ]       Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) 
[ ]       Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 
       240.14d-2(b))         
[ ]       Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 
       240.13e-4(c))         
       
   


Item 2.02    Results of Operations and Financial Condition. 
 
The slide presentation attached hereto as Exhibit 99.1, and incorporated herein by reference, will be presented at Principal
Financial Group, Inc.’s Investor Day Conference on December 10, 2008 and may be used by the company in various
other presentations to investors. The slide presentations are furnished and not filed pursuant to instruction B.2 of Form 8-K. 
 
Item 7.01    Regulation FD Disclosure     
 
The slide presentation attached hereto as Exhibit 99.1, and incorporated herein by reference, will be presented at Principal Financial
Group, Inc.’s Investor Day Conference on December 10, 2008 and may be used by the company in various other presentations to investors. The slide 
presentations are furnished and not filed pursuant to Instruction B.2 of Form 8-K. 
 
Item 9.01    Financial Statements and Exhibits 
 
Exhibit 99   Slide presentation presented at Principal Financial Group, Inc.’s Investor Day Conference on
    December 10, 2008. The slide presentations are furnished and not filed pursuant to Instruction B.2 of Form 8-K.
     
 
SIGNATURE
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
 
                                                                                     PRINCIPAL FINANCIAL GROUP, INC. 
 
                                                                                     By:    /s/_Tom Graf
                                                                                     Name: Tom Graf 
                                                                                     Title: Senior Vice President – Investor Relations 
 
 
Date: December 10, 2008     


  EXHIBIT INDEX 
 
 
EXHIBIT   
NUMBER  EXHIBIT 

99   Slide presentation presented at Principal Financial Group, Inc.’s Investor Day Conference on December 10, 2008