From Exxon's official webpage states: "Independent, registered auditors PricewaterhouseCoopers LLP..."
So, PWC is the auditor.
PWC
deloitte
KPMG
Deloitte & Touche LLP
Auditor's judgement
PWC
deloitte
KPMG
The firm Deloitte & Touché LLP is the independent auditor for Twitter. They handle all of the financial statements for this company.
PricewaterhouseCoopers, LLC
Deloitte & Touche LLP
Auditor's judgement
As of their 2011 annual report, it is PricewaterhouseCoopers.
An independent auditor is asked to express an opinion on the fair presentation of financial statements because a company may not be objective with respect to its own financial statements.
aaron barry berry
who is the independent accounting auditor for acer
Exxon doesn't actually operate the service stations which sell Exxon gasoline. You might find some of their affiliates which have associated cash checking services, but it would not be related to Exxon. It would be a service of the independent operator of the store.