If you want to see the players in the passive component world, visit the websites like mouser, digi-key, newark, etc. They sell the products and list the manufacturers.
From there you can get the company financial report for the last year to help you decide on the leader in the industry.
Visit yahoo finance and look at the historical values of the companies you found at the electronic component distributors and review as many previous years of financials for each company as you can.
Don't forget that the websites I mentioned in paragraph one, sell to everyone. The larger manufactures will have other sources, like the primary source, as they buy in quantity. The financials will have a clue.