4. Digital Realty Trust ( DLR) Facebook has leased nearly all of its data center space from several providers including Digital Realty Trust. The social network spends roughly $30 million a year on leases with DLR, but could rely less on the company in the future as it builds its own data centers. Shares of DLR have surged over 30% in the last 12 months as the company capitalizes on increased demand for data centers. Other customers include Google ( GOOG), Microsoft ( MSFT) and Yahoo! ( YHOO). >>To see these stocks in action, visit the 4 Companies Riding Facebook's Wave portfolio on Stockpickr. -- Written by Olivia Oran in New York. >To follow the writer on Twitter, go to http://twitter.com/Ozoran. >To submit a news tip, send an email to: email@example.com.