|Company||Market Cap (USD)|
|Digital Realty Trust, Inc.||$30.21 B|
|Alexandria Real Estate Equities, Inc.||$23.65 B|
|Boston Properties, Inc.||$10.06 B|
|Gecina SA||$7.86 B|
|Nippon Building Fund InCorp||$7.34 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.