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): September 15, 2010 Diamond Hill Investment Group, Inc. ------------------------------------------------------------------------------ (Exact Name of Registrant as Specified in its Charter) Ohio ------------------------------------------------------------------------------ (State or Other Jurisdiction of Incorporation) 000-24498 65-0190407 ------------------------------------------------------------------------------ (Commission File Number) (I.R.S. Employer Identification No.) 325 John H. McConnell Blvd, Suite 200, Columbus, Ohio 43215 ------------------------------------------------------------------------------ (Address of Principal Executive Offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (614) 255-3333 ------------------------------------------------------------------------------ (Former Name or Former Address, if Changed Since Last Report) Item 8.01 Other Events --------- --------------------------------------------- Diamond Hill Investment Group, Inc. annouced a new sub-advisory relationship with Nationwide Mutual Funds and Nationwide Variable Insurance Trust as described in the Registrant's press release dated September 15, 2010, a copy of which is filed herewith as Exhibit 99.1 and incorporated herein by reference. Item 9.01. Financial Statements and Exhibits --------- --------------------------------------------- Exhibit No. Document ----------- -------- 99.1 Press release issued by the Registrant dated September 15, 2010. 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 hereunto duly authorized. DIAMOND HILL INVESTMENT GROUP, INC. Date: September 16, 2010 By: /s/ James F. Laird ------------------------------- James F. Laird, Chief Financial Officer and Secretary