SECURITIES
                             AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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                                    FORM 8-K

                                 CURRENT REPORT



                     PURSUANT TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                         Date of Report: APRIL 20, 2007
                        (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))

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ITEM 7.01         REGULATION FD DISCLOSURE

This report is filed quarterly to disclose  Principal Global  Investors'  assets
under management,  prior to the availability of Principal Financial Group, Inc's
(The Principal(R))  quarterly earnings release. As of March 31, 2007,  Principal
Global  Investors  had  $213.6  billion  in  securities,  real  estate and other
investment assets under management.

Principal  Global  Investors is the  collective  term used to describe the asset
management operations of the following subsidiaries of The Principal:  Principal
Global  Investors,  LLC;  Principal Real Estate  Investors,  LLC; Spectrum Asset
Management,  Inc.; Post Advisory Group,  LLC;  Columbus Circle  Investors;  Edge
Asset Management,  Inc.; Principal Global Investors (Europe) Limited;  Principal
Global Investors  (Singapore) Ltd.; Principal Global Investors (Australia) Ltd.;
and Principal International, Inc. and its majority-owned affiliates.


                                    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/ THOMAS J. GRAF
                                           -------------------------------------
                                    Name:  Thomas J. Graf
                                    Title: Senior Vice President - Investor
                                           Relations


Date:    April 23, 2007


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