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            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="4">SECURITIES AND EXCHANGE COMMISSION</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="2">Washington, D.C. 20549</font></b></p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 18pt; TEXT-ALIGN: center">
            <font size="2">__________________</font></p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="4">FORM 8-K</font></b></p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 18pt; TEXT-ALIGN: center">
            <b><font size="2">CURRENT REPORT</font></b></p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="2">Pursuant to Section 13 or 15(d) of the</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="2">Securities Exchange Act of 1934</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center"><font size="2">Date
            of Report:</font> <b><font size="2">April 17, 2008</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 6pt; TEXT-ALIGN: center"><font size="2">(Date
            of earliest event reported)</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="4">PRINCIPAL FINANCIAL GROUP, INC.</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <font size="2">(Exact name of registrant as specified in its charter)</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center"></p>

            <table cellspacing="0" cellpadding="0" width="600" border="0">
                <tr>
                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <b><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">Delaware</font></b></p>
                    </td>

                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <b><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">1-16725</font></b></p>
                    </td>

                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <b><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">42-1520346</font></b></p>
                    </td>
                </tr>

                <tr>
                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <b><font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">
                        (State or other jurisdiction</font></b></p>

                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">
                        of incorporation)</font></p>
                    </td>

                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">
                        (Commission file number)</font></p>
                    </td>

                    <td style="PADDING-RIGHT: 0.07in; PADDING-LEFT: 0.07in; PADDING-BOTTOM: 0in; PADDING-TOP: 0in" valign="top" width="196">
                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">
                        (I.R.S. Employer</font></p>

                        <p style="MARGIN-TOP: 0pt; FONT-WEIGHT: bold; FONT-SIZE: 18pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in; TEXT-INDENT: 0px; FONT-FAMILY: 'TIMES'" align="center">
                        <font style="FONT-WEIGHT: normal; FONT-SIZE: 10pt; FONT-FAMILY: 'TIMES NEW ROMAN'">
                        Identification Number)</font></p>
                    </td>
                </tr>
            </table>
            <br>
            <br>


            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="2">711 High Street, Des Moines, Iowa 50392</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <font size="2">(Address of principal executive offices)</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <b><font size="2">(515) 247-5111</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">
            <font size="2">(Registrant&rsquo;s telephone number, including area code)</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: center">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left"><font size="2">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:</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="565" border="0">
                    <tr>
                        <td valign="top" nowrap width="16">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="21">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">[</font></p>
                        </td>

                        <td valign="top" nowrap width="27">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">]</font></p>
                        </td>

                        <td valign="top" nowrap width="501">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">Written communications pursuant to Rule 425 under the
                            Securities Act (17 CFR 230.425)</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="562" border="0">
                    <tr>
                        <td valign="top" nowrap width="16">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="21">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">[</font></p>
                        </td>

                        <td valign="top" nowrap width="24">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">]</font></p>
                        </td>

                        <td valign="top" nowrap width="501">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">Soliciting material pursuant to Rule 14a-12 under the
                            Exchange Act (17 CFR 240.14a-12)</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="602" border="0">
                    <tr>
                        <td valign="top" nowrap width="16">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="21">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">[</font></p>
                        </td>

                        <td valign="top" nowrap width="24">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">]</font></p>
                        </td>

                        <td valign="top" nowrap width="541">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">Pre-commencement communications pursuant to Rule
                            14d-2(b) under the Exchange Act (17 CFR</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="143" border="0">
                    <tr>
                        <td valign="top" nowrap width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="95">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">&nbsp;&nbsp;&nbsp;&nbsp;240.14d-2(b))</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="601" border="0">
                    <tr>
                        <td valign="top" nowrap width="16">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="21">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">[</font></p>
                        </td>

                        <td valign="top" nowrap width="24">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">]</font></p>
                        </td>

                        <td valign="top" nowrap width="540">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 125.28%; TEXT-ALIGN: left">
                            <font size="2">Pre-commencement communications pursuant to Rule
                            13e-4(c) under the Exchange Act (17 CFR</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="140" border="0">
                    <tr>
                        <td valign="top" nowrap width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="92">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">&nbsp;&nbsp;&nbsp;&nbsp;240.13e-4(c))</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 18pt; TEXT-ALIGN: center">
            <font size="2">__________________</font></p>
            <!-- EEDocs PBStart-->

            <p style="PAGE-BREAK-BEFORE: always"></p>
            <!-- EEDocs PBEnd-->

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left"><b><font size="2">Item
            7.01</font></b><font size="1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font>
            <b><font size="2">Regulation FD Disclosure</font></b></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 1in; TEXT-ALIGN: justify">
            <font size="2">This report is filed quarterly to disclose assets under management 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 assets under management by asset manager and presented again in such
            format within the Company's financial supplement for the quarter ended March 31, 2008
            when that document is posted to the Company's investor relations web site on or about
            May 5, 2008.</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 0.52in; TEXT-ALIGN: justify">
            &nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-INDENT: 0.5in; TEXT-ALIGN: justify">
            <font size="2">As of March 31, 2008, the assets under management by asset manager were
            $229.9 billion for Principal Global Investors and $28.5 billion for Principal
            International.</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: justify">&nbsp;</p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 12pt; TEXT-ALIGN: center">
            <font size="2">SIGNATURE</font></p>

            <p style="MARGIN-TOP: 12pt; MARGIN-BOTTOM: 12pt; TEXT-INDENT: 0.52in; TEXT-ALIGN: justify">
            <font size="2">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.</font></p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="579" border="0">
                    <tr>
                        <td valign="top" nowrap width="288">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="291">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">PRINCIPAL FINANCIAL GROUP, INC.</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="476" border="0">
                    <tr>
                        <td valign="top" nowrap width="288">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">By:</font></p>
                        </td>

                        <td valign="top" nowrap width="140">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <u><font size="2">/s/ Thomas J. Graf</font></u></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="456" border="0">
                    <tr>
                        <td valign="top" nowrap width="288">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">Name:</font></p>
                        </td>

                        <td valign="top" nowrap width="120">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">Thomas J. Graf</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="100%" border="0">
                    <tr>
                        <td valign="top" width="288">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">Title:</font></p>
                        </td>

                        <td valign="top">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">Senior Vice President &ndash; Investor
                            Relations</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 3in; TEXT-INDENT: 0.5in; TEXT-ALIGN: left">
            &nbsp;</p>

            <div align="left">
                <table style="BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="176" border="0">
                    <tr>
                        <td valign="top" nowrap width="16">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            &nbsp;</p>
                        </td>

                        <td valign="top" nowrap width="48">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">Date:</font></p>
                        </td>

                        <td valign="top" nowrap width="112">
                            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; TEXT-ALIGN: left">
                            <font size="2">April 17, 2008</font></p>
                        </td>
                    </tr>
                </table>
            </div>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>
            <!-- EEDocs PBStart--><!-- EEDocs PBEnd-->

            <p style="MARGIN-TOP: 0pt; MARGIN-BOTTOM: 0pt; TEXT-ALIGN: left">&nbsp;</p>
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{"company-data": {"conformed-name": "PRINCIPAL FINANCIAL GROUP INC", "cik": "0001126328", "assigned-sic": "6321", "irs-number": "421520346", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-16725", "film-number": "08761400"}, "business-address": {"street1": "711 HIGH STREET", "city": "DES MOINES", "state": "IA", "zip": "50392-0300", "phone": "5152475111"}, "mail-address": {"street1": "711 HIGH STREET", "city": "DES MOINES", "state": "IA", "zip": "50392-0300"}}
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 17, 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
of incorporation)
(Commission file number)
(I.R.S. Employer
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
            7.01
Regulation FD Disclosure
This report is filed quarterly to disclose assets under management 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 assets under management by asset manager and presented again in such
            format within the Company's financial supplement for the quarter ended March 31, 2008
            when that document is posted to the Company's investor relations web site on or about
            May 5, 2008.
As of March 31, 2008, the assets under management by asset manager were
            $229.9 billion for Principal Global Investors and $28.5 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/ Thomas J. Graf
Name:
Thomas J. Graf
Title:
Senior Vice President – Investor
                            Relations
Date:
April 17, 2008