The Bigs

This is a list of "Big x" corporations in their respective industries:

Big 6

Oil and gas (Big Oil/Oil supermajors)
The largest privately run oil companies in the world and their headquarters:

• Exxon Mobil Corp (Irving, Texas)
• Royal Dutch Shell plc (The Hague; London)
• BP plc (London)
• Total S.A. (Paris)
• Chevron Corp (San Ramon, Calif.)
• ConocoPhillips (Houston, Texas)

Film studios
The largest film financing and distribution companies in Hollywood, all largely based in the Los Angeles area:

• Paramount
• Warner Bros.
• Columbia (Sony Pictures Entertainment)
• Walt Disney Pictures
• Universal
• 20th Century Fox

Trade publishers

• Random House, Inc. (New York)
• Penguin Group (London)
• Hachette Book Group (New York)
• HarperCollins (New York)
• MacMillan Publishers (London)
• Simon & Schuster (New York)

Big 4

Banking
Big four banks in the United States:

• JPMorgan Chase & Co. (New York)
• Citigroup Inc. (New York)
• Bank of America Corp (Charlotte, N.C.)
• Wells Fargo & Co. (San Francisco, Calif.)

Big four banks in the United Kingdom:

• Barclays plc (London)
• HSBC Holdings plc (London)
• Lloyds Banking Group plc (London)
• Royal Bank of Scotland plc (Edinburgh)

Advertising and public relations

• WPP plc (London)
• Omnicom Group Inc. (New York)
• Publicis Groupe S.A. (Paris)
• Interpublic Group of Companies Inc. (New York)

Accountancy

• PricewaterhouseCoopers
• Deloitte
• KPMG
• Ernst & Young

Big 3

Consulting

• McKinsey (New York)
• Boston Consulting Group (Boston)
• Bain & Company (Boston)

Music labels

• Sony Music Entertainment (New York)
• Warner Music Group (New York)
• Universal Music Group (Santa Monica, Calif.); in the process of acquiring EMI

Credit rating

• Standard & Poor's (New York)
• Moody's Investors Service, Inc. (New York)
• Fitch Group (London; New York)