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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>
<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="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="3" face="Arial" style="font-size:12.0pt;">&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<br> 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>July 24, 2013</b></font></p>
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<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,&nbsp;Illinois</font></b></p>
<p align="center" style="margin:0in 0in .0001pt 10.0pt;text-align:center;text-indent:-10.0pt;"><font size="2" face="Arial" style="font-size:10.0pt;">(Address   of principal executive offices)</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;">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 style="margin:0in 0in .0001pt;"><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;">(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>
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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;">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 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;"><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 .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;">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 .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;">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 2.02.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Results of Operations and Financial Condition.*</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 July 24, 2013, Morningstar, Inc. issued a press release announcing its financial results for the second quarter ended June 30, 2013.&#160; A copy of the press release is attached hereto as Exhibit 99.1.</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)&#160;&#160;&#160;&#160;&#160;&#160;&#160; 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&nbsp;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 July 24, 2013.</font></p>    </td>   </tr>  </table>
<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="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">*</font></b></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">The   information furnished under Item 2.02 of this Current Report on Form 8-K,   including Exhibit 99.1, is being furnished and shall not be deemed to be   &#147;filed&#148; for the purposes of Section 18 of the Securities Exchange Act of   1934, as amended (the &#147;Exchange Act&#148;), or incorporated by reference in any   filing under the Securities Act of 1933, as amended, or the Exchange Act,   except as shall be expressly set forth by specific reference in such a   filing.</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_111759_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>
<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;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: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;">Date:&nbsp; July 25, 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 Scott Cooley</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   Scott Cooley</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>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">Chief   Financial Officer</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;">3<a name="PB_3_111913_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&nbsp;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;">&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:10.0pt;">Press   Release dated July 24, 2013.</font></p>    </td>   </tr>  </table>
<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="2" face="Arial" style="font-size:10.0pt;font-weight:bold;">*</font></b></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Arial" style="font-size:10.0pt;">The   information furnished under Item 2.02 of this Current Report on Form 8-K,   including Exhibit 99.1, is being furnished and shall not be deemed to be   &#147;filed&#148; for the purposes of Section 18 of the Securities Exchange Act of   1934, as amended (the &#147;Exchange Act&#148;), or incorporated by reference in any   filing under the Securities Act of 1933, as amended, or the Exchange Act,   except as shall be expressly set forth by specific reference in such a   filing.</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_111953_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": "13986169"}, "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):
July 24, 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 2.02.         Results of Operations and Financial Condition.*
On July 24, 2013, Morningstar, Inc. issued a press release announcing its financial results for the second quarter ended June 30, 2013.  A copy of the press release is attached hereto as Exhibit 99.1.
Item 9.01.  Financial Statements and Exhibits.
(d)        Exhibits:
Exhibit No.
Description
99.1*
Press   Release dated July 24, 2013.
*
The   information furnished under Item 2.02 of this Current Report on Form 8-K,   including Exhibit 99.1, is being furnished and shall not be deemed to be   "filed" for the purposes of Section 18 of the Securities Exchange Act of   1934, as amended (the "Exchange Act"), or incorporated by reference in any   filing under the Securities Act of 1933, as amended, or the Exchange Act,   except as shall be expressly set forth by specific reference in such a   filing.
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:  July 25, 2013
By:
/s/   Richard Scott Cooley
Name:
Richard   Scott Cooley
Title:
Chief   Financial Officer
3
EXHIBIT INDEX
Exhibit No.
Description
99.1*
Press   Release dated July 24, 2013.
*
The   information furnished under Item 2.02 of this Current Report on Form 8-K,   including Exhibit 99.1, is being furnished and shall not be deemed to be   "filed" for the purposes of Section 18 of the Securities Exchange Act of   1934, as amended (the "Exchange Act"), or incorporated by reference in any   filing under the Securities Act of 1933, as amended, or the Exchange Act,   except as shall be expressly set forth by specific reference in such a   filing.
4