|Company||Market Cap (USD)|
|American Tower||$90.69 B|
|Equinix, Inc. (REIT)||$73.61 B|
|Crown Castle International Corp. (REIT)||$50.28 B|
|SBA Communications Corporation||$26.10 B|
|Weyerhaeuser Company||$24.73 B|
The market capitalization of a company, more simply referred to as "market cap", is the total market value of a publicly traded company's outstanding shares. It is often considered as a key indicator of what a company is worth.