You will have to rely on directory and journal literature. Disc Plus Build your ideal set of companies for potential employment using this directory of US businesses, searchable by geographical location, line of business, employees, SIC code, etc.
Output can be tricky.
The premier business and management database providing extensive coverage of North America and the world. Find research on advertising, marketing, economics, human resources, finance, taxation, computers, and more. Business Newsbank Full text of local and regional newspapers covering both private and public companies. In addition to the full text, this database offers indexing and abstracts for nearly 1,570 journals. This database contains popular business publications such as Business Week, Forbes, and Harvard Business Review, and hundreds of scholarly, peer reviewed journals.