There are a number of free web sites that list top public companies within an industry by valuation, by market capitalization, by growth and more. Examples of these include the following:
Industry Centre Performance information.
1. Scroll down to Industry Index in left column.
2. Select from list of industries.
1. Under "Markets" in right column, click on Sectors.
3. Select from the list of sectors listed under Sector summary.
4. Select a specific industry from Related Topics option.
5. Click on Company rankings.