COLUMBUS, Ohio, Aug. 6 /PRNewswire-FirstCall/ -- Diamond Hill Investment Group, Inc. DHIL today reported unaudited results for the quarter ended June 30, 2010. The operating results for the second quarter of 2010 are summarized in the following paragraphs; however, the company urges investors to read Form 10-Q in addition to this release. The limited information that follows is not adequate for making an informed investment judgment.