Researching companies can be straightforward or complex, depending upon the type of company you're researching (domestic, international, public or private). The resources listed here will give you starting points for researching companies.
Provides U.S. company data for over 15,000 public companies and their SEC filings, U.S. annual reports, plus international company data for approximately 17,000 companies, international annual reports, FactSheets, and country information
Provides business and consumer research in a full-service platform that can create market plans, conduct competitive analysis, raise funds, and locate people.