Unexpectedly Intriguing!
27 January 2022

At the end of 2021, the companies that make up the S&P 500 (Index: SPX) were collectively worth $42.37 trillion. The 10 stocks that make up the largest components of the market capitalization weighted index accounted for 29.5% of that value. The following chart shows their share of the market cap of the whole index:

S&P 500 Market Capitalization, Snapshot on 31 December 2021

The other 495 firms in the S&P 500 have a collective market capitalization of $29.86 trillion.

Here is the list of the top 10 components of the S&P 500 index as of 31 December 2021:

  • Apple (NASDAQ: AAPL)
  • Microsoft (NASDAQ: MSFT)
  • Amazon (NASDAQ: AMZN)
  • Alphabet (A) (NASDAQ: GOOGL)
  • Tesla (NASDAQ: TSLA)
  • Alphabet (C) (NASDAQ: GOOG)
  • Facebook (NASDAQ: FB)
  • Nvidia (NASDAQ: NVDA)
  • Berkshire Hathaway (B) (NYSE: BRK.B)
  • United Healthcare (NYSE: UNH)

The top two firms, Apple and Microsoft, had market caps that were nearing $3 trillion each, with Apple briefly exceeding that value in early January 2022. If we combined the market cap for the two classes of Alphabet stocks, the firm formerly known as Google would have a market cap in excess of $1.8 trillion, which would rank third. Separately however, the individual Alphabet stocks rank fourth ($0.92 trillion) and sixth ($0.85 trillion) for their market cap in the S&P 500 index among the individual stock listings.

The undivided Amazon ranks third for individual stocks with a market cap of nearly $1.5 trillion. Tesla ranks fifth at $0.91 trillion, with its market cap squeezing in between the two classes of Alphabet shares. Facebook came in seventh at $0.85 trillion, graphics chipmaker Nvidia was eighth at $0.77 trillion, followed by re-insurer/conglomerate Berkshire Hathaway at $0.57 trillion.

Closing out the list, United Healthcare had a market cap of just under $0.50 trillion, edging out JP Morgan Chase (NYSE: JPM), which it replaced in the S&P 500's top 10 stocks since our August 2021 update.


Standard and Poor. S&P 500 Index Earnings and Estimates. [Excel Spreadsheet]. Accessed 31 December 2021.

Standard and Poor. S&P Market Attributes. [Excel Spreadsheet]. Accessed 31 December 2021.

Slickcharts. S&P 500 Companies by Weight. [Online Database]. Accessed 31 December 2021.

Ycharts. S&P 500 Market Cap. [Online Database]. Accessed 31 December 2021.

Labels: ,

About Political Calculations

Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:

ironman at politicalcalculations.com

Thanks in advance!

Recent Posts

Indices, Futures, and Bonds

Closing values for previous trading day.

Most Popular Posts
Quick Index

Site Data

This site is primarily powered by:

This page is powered by Blogger. Isn't yours?

CSS Validation

Valid CSS!

RSS Site Feed

AddThis Feed Button


The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.

Other Cool Resources

Blog Roll

Market Links

Useful Election Data
Charities We Support
Shopping Guides
Recommended Reading
Recently Shopped

Seeking Alpha Certified

Legal Disclaimer

Materials on this website are published by Political Calculations to provide visitors with free information and insights regarding the incentives created by the laws and policies described. However, this website is not designed for the purpose of providing legal, medical or financial advice to individuals. Visitors should not rely upon information on this website as a substitute for personal legal, medical or financial advice. While we make every effort to provide accurate website information, laws can change and inaccuracies happen despite our best efforts. If you have an individual problem, you should seek advice from a licensed professional in your state, i.e., by a competent authority with specialized knowledge who can apply it to the particular circumstances of your case.