California Public Employees Retirement System lessened its stake in Omnicom Group Inc. (NYSE:OMC – Free Report) by 1.8% in the fourth quarter, Holdings Channel reports. The fund owned 1,104,617 shares of the business services provider’s stock after selling 20,243 shares during the quarter. California Public Employees Retirement System’s holdings in Omnicom Group were worth $95,560,000 […]