They control their image

Finance: BBH, BNP Paribas, Citi, Dexia, HSBC, Société Générale, …

Big 4: Deloitte, Ernst & Young, KPMG, PwC, …

Lawyers: Clifford Chance, Linklaters, Loyens & Loeff, NautaDutilh, …

Automobile: BMW, Jaguar, Lexus, Maserati, Mercedes, Volvo, …

Medical Industry: Astra Zeneca, BMS, GSK, Teva Classics, …

Luxury: Boucheron, Frey-Wille, Mephisto, Sonia Rykiel, Vuitton, …