Company websites are either:
Most corporate websites are linked from the customer-facing pages, look for a link that says ‘Corp Info’ or ‘Investor relations’.
Annual Reports websites:
It is always worth getting a second opinion. What are other people saying about the company? It is often different from what they are saying about themselves.
There are two databases that are particularly good at presenting analysis on companies, Business Source Complete and ABI/Inform Complete. Both have company information form various sources: academic journals, popular magazines, newspapers and trade journals.
SCONUL Access is a reciprocal scheme which allows library users to use books and journals at other libraries which belong to the scheme, The scheme covers most of the university libraries in the UK and Ireland.