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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">&nbsp;</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Arial" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Arial" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">Washington, D.C.&#160; 20549</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Arial" style="font-size:18.0pt;font-weight:bold;">FORM 8-K</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Arial" style="font-size:12.0pt;font-weight:bold;">CURRENT REPORT</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Arial" style="font-size:12.0pt;font-weight:bold;">Pursuant to Section 13 or 15(d) of</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Arial" style="font-size:12.0pt;font-weight:bold;">the Securities Exchange Act of 1934</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">Date of Report (Date of earliest event reported):&#160; <b>October 8, 2013</b></font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Arial" style="font-size:18.0pt;font-weight:bold;">MORNINGSTAR, INC.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Exact name of registrant as specified in its charter)</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">Illinois</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(State or other jurisdiction</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">of incorporation)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">000-51280</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Commission</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">File Number)</font></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">36-3297908</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(I.R.S. Employer</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">Identification No.)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">22 West Washington Street</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">Chicago, Illinois</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Address of principal executive offices)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Arial" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">60602</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Zip Code)</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">(312) 696-6000</font></b></p>
<p align="center" style="margin:0in 0in .0001pt 1.3pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Registrant&#146;s telephone number, including area code)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">N/A</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">(Former name or former address, if changed since last report)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">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:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" face="Arial" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" face="Arial" style="font-size:10.0pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" face="Arial" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" face="Arial" style="font-size:10.0pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt .5in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" face="Arial" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</font></p>
<p style="margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt .5in;text-indent:-.25in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" face="Arial" style="font-size:10.0pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</font></p>
<p style="margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">Item 5.02&#160; Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">On October 8, 2013, Morningstar, Inc. announced that Don Phillips will be stepping down as head of the company&#146;s research group effective January 1, 2014.&#160; Don will be a managing director and remain a member of the company&#146;s Board of Directors.&#160; A copy of the company&#146;s press release is included as Exhibit 99.1 and incorporated by reference herein.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">Item 9.01.&#160; Financial Statements and Exhibits.</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Arial" style="font-size:10.0pt;">(d)</font><font size="1" face="Arial" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font size="2" face="Arial" style="font-size:10.0pt;">Exhibits:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Arial" style="font-size:8.0pt;font-weight:bold;">Exhibit   No.</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Arial" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Arial" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Press   release dated October 8, 2013.</font></p>    </td>   </tr>  </table>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">2<a name="PB_2_222627_7056"></a></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">SIGNATURES</font></b></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Arial" style="font-size:10.0pt;">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 hereunto duly authorized.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">MORNINGSTAR,   INC.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Date:   October 8, 2013</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">/s/   Richard E. Robbins</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Name:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Richard   E. Robbins</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Title:</font></p>    </td>
<td width="42%" valign="top" style="padding:0in 0in 0in 0in;width:42.26%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">General   Counsel and Corporate Secretary</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">3<a name="PB_3_222700_5335"></a></font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">EXHIBIT INDEX</font></b></p>
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<p style="margin:0in 0in .0001pt;"><b><font size="1" face="Arial" style="font-size:8.0pt;font-weight:bold;">Exhibit   No.</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Arial" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
<td width="85%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:85.0%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Arial" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="85%" valign="top" style="border:none;padding:0in 0in 0in 0in;width:85.0%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">99.1</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Press   release dated October 8, 2013.</font></p>    </td>   </tr>  </table>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Arial" style="font-size:10.0pt;">4<a name="PB_4_222732_5796"></a></font></p>
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{"company-data": {"conformed-name": "Morningstar, Inc.", "cik": "0001289419", "assigned-sic": "6282", "irs-number": "363297908", "state-of-incorporation": "IL", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-51280", "film-number": "131141712"}, "business-address": {"street1": "22 WEST WASHINGTON STREET", "city": "CHICAGO", "state": "IL", "zip": "60602", "phone": "(312) 696-6000"}, "mail-address": {"street1": "22 WEST WASHINGTON STREET", "city": "CHICAGO", "state": "IL", "zip": "60602"}}
UNITED STATES
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 (Date of earliest event reported):
October 8, 2013
MORNINGSTAR, INC.
(Exact name of registrant as specified in its charter)
Illinois
(State or other jurisdiction
of incorporation)
000-51280
(Commission
File Number)
36-3297908
(I.R.S. Employer
Identification No.)
22 West Washington Street
Chicago, Illinois
(Address of principal executive offices)
60602
(Zip Code)
(312) 696-6000
(Registrant's telephone number, including area code)
N/A
(Former name or former address, if changed since last report)
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:
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 5.02  Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
On October 8, 2013, Morningstar, Inc. announced that Don Phillips will be stepping down as head of the company's research group effective January 1, 2014.  Don will be a managing director and remain a member of the company's Board of Directors.  A copy of the company's press release is included as Exhibit 99.1 and incorporated by reference herein.
Item 9.01.  Financial Statements and Exhibits.
(d)
Exhibits:
Exhibit   No.
Description
99.1
Press   release dated October 8, 2013.
2
SIGNATURES
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 hereunto duly authorized.
MORNINGSTAR,   INC.
Date:   October 8, 2013
By:
/s/   Richard E. Robbins
Name:
Richard   E. Robbins
Title:
General   Counsel and Corporate Secretary
3
EXHIBIT INDEX
Exhibit   No.
Description
99.1
Press   release dated October 8, 2013.
4