Of what nationality are both Dentsply Sirona and Omnicom Group?
Omnicom Group Omnicom Group, Inc. is an American global marketing and corporate communications holding company, headquartered in New York City.
Rocco Forte Sir Rocco Giovanni Forte, FCA, FIoD (born 18 January 1945) is an English hotelier and the chairman of Rocco Forte Hotels.