Largest 25 Stocks in the S&P 500, Now vs 10 Years Ago By: TalkMarkets September 09, 2021 at 22:04 PM EDT In the last 10 years, the composition of the largest 25 companies by market cap in the S&P 500 has changed dramatically. Read More >> Related Stocks: Alphabet-A Amazon.com Apple Exxon Mobil Facebook International Business Machines JPMorgan Chase & Co Microsoft Pfizer Procter & Gamble Tesla, Inc.