|Company||Market Cap (USD)|
|Digital Realty Trust, Inc.||$34.67 B|
|Alexandria Real Estate Equities, Inc.||$20.48 B|
|Boston Properties, Inc.||$9.56 B|
|Gecina SA||$8.04 B|
|CoreSite Realty Corporation||$7.29 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.