Christophe Morin/IP3/Getty Images Publicis is the third-largest advertising company by revenue, with clients including Disney, Kraft Heinz, and Samsung. It's outperformed bigger rivals WPP and Omnicom in recent months thanks to a string of new business wins. Insider identified 29 of the most powerful executives at Publicis leading its rebound. Publicis, with advertising and PR agencies like Saatchi & Saatchi, MSL, and Epsilon, is the third-largest ad holding company by revenue. It's long trailed bigger rivals WPP and Omnicom, but has outperformed both of those companies in recent months thanks to new business wins including Kraft Heinz, Sephora, Hulu , and L'Oréal.