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   <TD align=center><B><FONT size=5 face=serif>SECURITIES AND EXCHANGE COMMISSION</FONT></B>&nbsp;</TD></TR>

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   <TD align=center><B><FONT size=2 face=serif>Washington, D.C. 20549</FONT></B></TD></TR>

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   <TD align=center><B><FONT size=5 face=serif>FORM 8-K</FONT></B></TD></TR>

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   <TD align=center><B><FONT size=3 face=serif>CURRENT REPORT</FONT></B></TD></TR>

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   <TD>&nbsp;</TD></TR>

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   <TD align=center><B><FONT size=3 face=serif>Pursuant to Section 13 or 15(d) of the</FONT></B></TD></TR>

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   <TD align=center><B><FONT size=3 face=serif>Securities Exchange Act of 1934</FONT></B></TD></TR>

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   <TD align=center><FONT size=3 face=serif>Date of Report: </FONT><B><FONT size=3 face=serif>April 16, 2012</FONT></B></TD></TR>

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   <TD align=center><FONT size=3 face=serif>(Date of earliest event reported)</FONT></TD></TR>

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   <TD align=center><B><FONT size=5 face=serif>PRINCIPAL FINANCIAL GROUP, INC.</FONT></B>&nbsp;</TD></TR>

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   <TD align=center><FONT size=3 face=serif>(Exact name of registrant as specified in its charter)</FONT></TD></TR></TABLE></DIV>

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   <TD align=center><B><FONT size=3 face=serif>Delaware</FONT></B>&nbsp;</TD>

   <TD style="TEXT-INDENT: 26.909pt" align=center><B><FONT size=3 face=serif>1-16725</FONT></B>&nbsp;</TD>

   <TD align=center><B><FONT size=3 face=serif>42-1520346</FONT></B>&nbsp;</TD></TR>

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   <TD align=center><FONT size=3 face=serif>(State or other jurisdiction</FONT>&nbsp;</TD>

   <TD align=center><FONT size=3 face=serif>(Commission file number)</FONT>&nbsp;</TD>

   <TD align=center><FONT size=3 face=serif>(I.R.S. Employer</FONT>&nbsp;</TD></TR>

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   <TD align=center><FONT size=3 face=serif>of incorporation)</FONT>&nbsp;</TD>

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   <TD align=center><FONT size=3 face=serif>Identification Number)</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD align=center><B><FONT size=3 face=serif>711 High Street, Des Moines, Iowa 50392</FONT></B>&nbsp;</TD></TR>

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   <TD align=center><FONT size=3 face=serif>(Address of principal executive offices)</FONT></TD></TR>

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   <TD>&nbsp;</TD></TR>

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   <TD align=center><B><FONT size=3 face=serif>(515) 247-5111</FONT></B></TD></TR>

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   <TD align=center><FONT size=3 face=serif>(Registrant&#8217;s telephone number, including area code)</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>filing obligation of the registrant under any of the following provisions:</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>[&nbsp; &nbsp;]</FONT>&nbsp;</TD>

   <TD align=left><FONT size=3 face=serif>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>[&nbsp;&nbsp; ]</FONT>&nbsp;</TD>

   <TD style="TEXT-INDENT: 0.06pt" align=left><FONT size=3 face=serif>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>[&nbsp;&nbsp; ]</FONT>&nbsp;</TD>

   <TD style="TEXT-INDENT: 0.069pt" align=left><FONT size=3 face=serif>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act</FONT>&nbsp;</TD></TR>

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   <TD align=left>&nbsp;</TD>

   <TD style="TEXT-INDENT: 0.045pt" align=left><FONT size=3 face=serif>(17 CFR 240.14d-2(b))</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>[&nbsp; &nbsp;]</FONT>&nbsp;</TD>

   <TD style="TEXT-INDENT: 0.069pt" align=left><FONT size=3 face=serif>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act</FONT>&nbsp;</TD></TR>

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   <TD align=left>&nbsp;</TD>

   <TD style="TEXT-INDENT: 0.045pt" align=left><FONT size=3 face=serif>(17 CFR 240.13e-4(c))</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD align=left><FONT size=3 face=serif>Page 2</FONT>&nbsp;</TD>

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   <TD align=left><B><FONT size=3 face=serif>Item 7.01</FONT></B>&nbsp;</TD>

   <TD align=left><B><FONT size=3 face=serif>Regulation FD Disclosure</FONT></B>&nbsp;</TD></TR>

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   <TD colSpan=2>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>This report is filed quarterly to disclose assets under management (&#8220;AUM&#8221;) by asset manager,</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>prior to the availability of Principal Financial Group, Inc's (the "Company") quarterly earnings</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>release. The amounts presented herein will be consistent with the format of AUM by asset manager</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>and presented again in such format within the Company's financial supplement for the quarter</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>ended March 31, 2012 when that document is posted to the Company's investor relations web site</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>on or about April 26, 2012. AUM may include assets managed directly and pursuant to dual</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>employment agreements among affiliated companies.</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>As of March 31, 2012, the assets under management by asset manager were $242.2 billion for</FONT>&nbsp;</TD></TR>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>Principal Global Investors and $56.6 billion for Principal International.</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD align=left><FONT size=3 face=serif>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SIGNATURE</FONT></TD></TR>

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   <TD align=left><FONT size=3 face=serif>Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>this report to be signed on its behalf by the undersigned thereunto duly authorized.</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD style="TEXT-INDENT: 0pt" align=left><FONT size=3 face=serif>PRINCIPAL FINANCIAL GROUP, INC.</FONT>&nbsp;</TD></TR>

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   <TD style="TEXT-INDENT: 0pt" align=left><FONT size=3 face=serif>By:</FONT>&nbsp;<U>__/s/ John Egan&nbsp; </U>___________________________</TD></TR>

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   <TD align=left><FONT size=3 face=serif>Name: John Egan</FONT>&nbsp;</TD></TR>

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   <TD align=left><FONT size=3 face=serif>Title: Vice President &#8211; Investor Relations</FONT>&nbsp;</TD></TR></TABLE></DIV>

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   <TD colSpan=2 align=left><FONT size=3 face=serif>Date:</FONT>&nbsp;&nbsp; <FONT size=3 face=serif>April 16, 2012</FONT>&nbsp;</TD></TR></TABLE></DIV>

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firstqtraumbymanager.htm - Generated by SEC Publisher for SEC Filing
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:
April 16, 2012
(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))
Page 2
Item 7.01
Regulation FD Disclosure
This report is filed quarterly to disclose assets under management ("AUM") by asset manager,
prior to the availability of Principal Financial Group, Inc's (the "Company") quarterly earnings
release. The amounts presented herein will be consistent with the format of AUM by asset manager
and presented again in such format within the Company's financial supplement for the quarter
ended March 31, 2012 when that document is posted to the Company's investor relations web site
on or about April 26, 2012. AUM may include assets managed directly and pursuant to dual
employment agreements among affiliated companies.
As of March 31, 2012, the assets under management by asset manager were $242.2 billion for
Principal Global Investors and $56.6 billion for Principal International.
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/ John Egan
___________________________
Name: John Egan
Title: Vice President – Investor Relations
Date:
April 16, 2012