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):

                               January 3, 2013

                       Diamond Hill Investment Group, Inc.
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             (Exact Name of Registrant as Specified in its Charter)

                                      Ohio
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                 (State or Other Jurisdiction of Incorporation)

             000-24498                              65-0190407
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      (Commission File Number)         (I.R.S. Employer Identification No.)

      325 John H. McConnell Blvd, Suite 200, Columbus, Ohio         43215
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      (Address of Principal Executive Offices)                    (Zip Code)

Registrant's Telephone Number, Including Area Code:   (614) 255-3333

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          (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:

[ ] 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 8.01.    Other Events
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     The following is a summary of assets under management as of December 31,
2012 of Diamond Hill Capital Management, Inc., a wholly owned subsidiary of
Diamond Hill Investment Group, Inc. (in millions):


	By Investment Vehicle
	---------------------

Proprietary funds	 	$  5,251
Sub-advised funds	 	     947
Separate accounts		   3,231
                                --------
Total			       	$  9,429


	By Investment Strategy
	----------------------
Small Cap			$    939
Small-Mid Cap		             364
Large Cap 			   5,211
Select (All Cap)		     258
Long-Short		           2,455
Strategic Income		     202
				--------
Total			        $  9,429


                                    SIGNATURE
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     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.


                                        DIAMOND HILL INVESTMENT GROUP, INC.


Date: January 3, 2013	                    By: /s/ James F. Laird
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                                            James F. Laird, Chief Financial
                                            Officer and Secretary