S&P 500
The 10 largest companies in the index are responsible for 26.4% of the tied investments. The 10 largest companies in the S&P 500, in order of size, are Apple Inc., Microsoft, Amazon.com, Facebook, Alphabet Inc. (class A & C), Tesla, Inc., Berkshire Hathaway, JPMorgan Chase, and Johnson & Johnson. For a list of companies in the S&P 500, see List of S&P 500 companies.