Q. Where can I find a list of major players in an industry?

For a focus on US industries, the IBISWorld database industry profiles include a tab for Major Companies (as well as a Competitive Landscape tab which discusses market concentration etc.).  Mintel database market reports also include a section on key companies and company/brand sales.  For global coverage, Passport industry reports include data on company shares of global market.  Please contact the business librarian for more information.