It's a good week for S&P 500 (SPX) snapshots, where we're focusing on the index' market capitalization in this update.

But not just of the index as a whole. We've also identified the Top 10 firms making up the 505 stocks that make up the current composition of the S&P 500, where we find they collectively account for 27.8% of the index' entire market capitalization of $31.75 trillion.

The other 495 firms in the S&P 500 have a collective market capitalization of $26.8 trillion. That figure, coincidentally, was the entire market capitalization of all the companies of the S&P 500 back on July 31, 2020!

Here's the list of the top 10 components of the S&P 500 index:

• Apple (AAPL)
• Microsoft (MSFT)
• Amazon (AMZN)
• Facebook (FB)
• Alphabet (A) (GOOGL)
• Alphabet (C) (GOOG)
• Tesla (TSLA)
• Berkshire Hathaway (B) (BRK-B)
• Nvidia (NVDA)
• JP Morgan Chase (JPM)

The top two firms, Apple and Microsoft, have market caps in excess of $2 trillion each. Amazon, which ranks third, has a market cap of nearly $1.4 trillion. If we combine the market cap for the two classes of Alphabet stocks, the firm formerly known as Google would have a market cap in excess of $1.5 trillion. Separately, both Alphabet stocks fall below Facebook, which ranks fourth among the individual stock listings, having a market cap in excess of $854 billion.

Dropping down the list, Tesla has surged into the Top 10 of the S&P 500's components since our last snapshot from August 2020. Nvidia also joins the list in this edition.

Meanwhile Berkshire Hathaway carries over, but Johnson & Johnson has dropped out of the top ten, replaced by JP Morgan Chase.

References

Slickcharts. S&P 500 Companies by Weight. [Online Database]. Accessed 15 August 2021.

Ycharts. S&P 500 Market Cap. [Online Database]. 31 July 2020. Accessed 15 August 2021.