We get quite a few questions about marketcap. We provide that data going back to 2008 for US securities. If you want to access that data through the API, here is a great tutorial walking you through the web API.

If you want to work with Excel, here is the tutorial for the Excel add in:

https://docs.intrinio.com/tutorial/excel

In the API, a historical marketcap call would look like this:

https://api-v2.intrinio.com/companies/AAPL/historical_data/marketcap?start_date=2014-01-01&end_date=2015-01-01

To get the current marketcap, you would use this:

https://api-v2.intrinio.com/companies/AAPL/data_point/marketcap

In Excel, historical marketcap:

=IntrinioHistoricalData("AAPL", "marketcap", 2, "2009-01-01", "2011-01-01")

Or, the most recent marketcap in Excel:

=IntrinioDataPoint("AAPL","marketcap")
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