"Market share is, quite simply, the ratio of sales for one company's product or product line to the total market sales of that product or product line, expressed as a percentage of the market" (p. 147). This book is located in the 3rd floor Reference Collection. Market Share is addressed and explained on pages 147-149; you may find this information helpful.
What is Market Share?
Market Share is the "percentage of industry sales of a particular company or product" (Friedman, 2000, p. 414)
The companies on this list includes firms with annual revenue greater than $2 billion and either too few shareholders to be required to file financial statements with the Securities and Exchange Commission or have shares whose ownership is restricted to some group, such as employees or family members.
The Inc. 5,000 is an expansion of the Inc. 500, which was introduced in 1982. The Inc. 5,000 offers a comprehensive look at the 5000 fastest growing private companies in America.
'Advanced Search' setting; Enter 'NAICS code' or 'Company Organization' in the appropriate search box; combine with keywords 'market share' or 'rankings' using the search boxes at the top of the page; narrow results, as needed.