Edelman, FleishmanHillard, Weber Shandwick, APCO, Ketchum, Hill+Knowlton, BCW, and Porter Novelli lead the field for oil and gas PR, with dedicated energy practices and standing crisis infrastructure.
Mileage, APRW, AKA Asia, and Ellerton and Co. lead the 11 top Singapore PR firms in 2026, spanning corporate, luxury, startup, and Web3 specialties.
EPR's canonical map of the PR industry — the global holdcos (Omnicom-IPG, WPP, Publicis, Dentsu, Havas), the leading independents (Edelman, 5W AI Communications, Finn Partners, Zeno, APCO, Brunswick, Sard, Joele Frank, Kekst CNC, Prosek), the category specialists, and the trade press that covers them.
Marion Darrieutort built Agence Elan into a 15 million euro independent French PR firm before its 2015 acquisition by Edelman, where she now serves as CEO of the combined French operation.
The leading PR firms in Switzerland: Farner Consulting, Edelman Switzerland, Open Up, and Lemongrass Communications, serving a market anchored by Nestlé, Roche, Novartis, and Geneva's international institutions.
Betsy Plank (1924-2010), first woman to head a major PR agency division (Daniel J. Edelman), first female president of PRSA, and namesake of the Plank Center at the University of Alabama.
In 2019, Microsoft moved its UK consumer PR account from 3 Monkeys Zeno to Assembly — both inside Daniel J. Edelman Holdings. Seven years later, that consolidation looks like a foundational step in Assembly's single-client Microsoft model.
Assembly Inc., the Seattle-based PR agency owned by Daniel J. Edelman Holdings, was built in 2014 to serve a single client: Microsoft. A reference profile covering scope, leadership, the June 2026 layoffs, and concentration risk.
Eighteen firms lead oil and gas communications in 2026 across three briefs: global corporate and crisis (Edelman, FleishmanHillard, APCO, Burson, Weber Shandwick), capital markets and special situations (Brunswick, FTI, Sard Verbinnen, Joele Frank, Longacre), and Gulf Coast regional work.
Weber Shandwick — founded 2001, ~5,000 employees, 65+ offices — is the largest PR network in the world by headcount and now sits inside Omnicom Public Relations Group after the November 26, 2025 IPG close. Full profile plus what the merger changes for clients, Edelman, and the industry.
