On April 13, 2018 Lisa M. Wesolek informed Diamond Hill Investment Group, Inc. and its subsidiaries that she will be retiring from the Company effective December 31, 2018. Ms. Wesolek, who has been on short-term medical leave, will be stepping down as Chief Operating Officer of the Company effective April 30, 2018 to focus fully on her health. She will remain employed with the Company as an advisor to the executive leadership team through her retirement date. The Company does not anticipate hiring a replacement Chief Operating Officer. Ms. Wesolek's responsibilities will be divided among current team members.