Which companies have the most employees on H-1B visas?

News Snapshot:

In helping instigate a heated debate over H-1B visas, Elon Musk is speaking both from personal experience and as a business owner. That's because his company, electric car maker Tesla, is among the U.S. companies that bring thousands of foreign engineers and other skilled workers into the U.S. each year. After not placing in the top 25 H-1B visa employers in prior years, Tesla now ranks No. 16, according to the National Foundation for American Policy (NFAP) a nonpartisan think tank focused on trade and immigration issues. While well behind the likes of technology giants such as Amazon, IBM, Microsoft...