The global Big Four auditing firms handle the vast majority of audits for publicly traded companies, and also private companies. Worldwide, by revenue, the Big Four are:

PricewaterhouseCoopers, $25.2bn (1);

Deloitte Touche Tohmatsu, $23.1bn (2);

Ernst & Young, $21.1bn (3); and 

KPMG, $19.8bn (4).

 

 

E&Y CEO Appointed Chair of Center for Audit Quality (10/04/07)

 

Accounting Firms Lauded by Working Mother Magazine (09/26/07)

 

Double-Digit Growth for Accounting Firms on CCH List (9/20/07)

Accounting Firms Among Best Places to Launch a Career (09/14/07)

 

E&Y Launches Campus Video Competition (09/14/07)

 

Deloitte Recruits Gen Y With Short Films (09/12/07)

 

AFL-CIO Urges Accountants to Scrutinize Stock-Option Grants  (08/28/07)

 

Deloitte Launches C-Suite Best Practices Periodical  (08/28/07)

 

IBM, PwC Settle Lawsuit (08/17/07)

 

For Moms, Return to Work a Bit Cushier (08/15/07)

 

KPMG: Some Companies Outpace Market With Lower Compliance Costs (08/01/07)

 

PCAOB Inspection Report Reveals Deficiencies in KPMG Audits in 2006 (07/30/07)

 

PwC Agrees to Pay $225M in Tyco Settlement (07/09/07)

 

Pricewaterhousecoopers to Add 55 New Partners in China (07/06/07)

 

SEC Seeks Comments on Int'l Accounting Proposal (07/06/07)

 

SEC Launches Effort to Simplify Accounting, Give Companies Clearer Guidelines (06/28/07)

 

Federal Prosecutors Try to Save the Largest Criminal Tax Case in U.S. History (06/26/07)

 

PwC Withdraws All Audits of Yukos Oil Company, Amid Investigation (06/26/07)

 

Deloitte Forms Think Tank Forensic Center (06/22/07)

 

Inspection by Accounting Board Prompts Deloitte to Revisit Some Audits (06/20/07)

 

Partners of Ernst & Young Charged (05/31/07)

 

U.S. Treasury Wants Accounting Industry Reforms (05/21/07)

 

PwC Study: Internal Audits Lack Strategy for Risk Assessment (05/21/07)

 

Sarbanes Compliance Costs Decline Again, Auditor Fees Unchanged (05/17/07)

 

Ernst & Young Audits Faulted in Report (05/03/07)

 

* source: wikipedia.org