Public companies are required by law to openly share some of their financial and business records. Annual reports are an especially useful source of this information. These are also known as 10-K reports. (Private companies do not provide annual reports to the public.)
Two places to find them:
Global business database containing company profiles; current news; industry analysis; financial and technology reports; and market and consumer reports. Currently only available to on-campus users.
To locate info about local and small U.S. businesses:
Start at the Data Axle link above
Then go to 
and use the Custom Search to search by general location, business size, and other factors.
Click Update Count, then View Results when you're done building the search.
Click the company name to review their report.
Select "Advanced Search" on the Business Source Premier home page and expand the filters and use the "Publication Type" drop down menu and select "Company Profile" to look for articles and reports, such as a Marketline Report, which details the company's products, services, and other key information.
EBSCO database containing full-text journals, magazines, newspapers, and case studies as well as company, industry, market, and country reports.