X0306 4 2012-12-17 0 0001107694 RACKSPACE HOSTING, INC. RAX 0001441652 Napier A Lanham C/O RACKSPACE HOSTING, INC. 5000 WALZEM ROAD SAN ANTONIO TX 78218 1 1 0 0 CEO Common Stock 2012-12-17 4 M 0 19060 2.50 A 911210 D Common Stock 2012-12-17 4 S 0 19060 70.1356 D 892150 D Common Stock 2012-12-18 4 M 0 27440 2.50 A 919590 D Common Stock 2012-12-18 4 S 0 27440 70.00 D 892150 D Common Stock 3643386 I Shares held by HBSA, LP. Common Stock 37492 I Held in trust for the benefit of Mr. Napier's children. Employee Stock Option (Right to Buy) 2.5 2012-12-17 4 M 0 19060 0 D 2009-12-31 2015-12-31 Common Stock 19060 929678 D Employee Stock Option (Right to Buy) 2.5 2012-12-18 4 M 0 27440 0 D 2009-12-31 2015-12-31 Common Stock 27440 902238 D These shares were sold pursuant to Mr. Napier's Rule 10b5-1 trading plan adopted by Mr. Napier on August 16, 2012. The prices for these sales of shares ranged from $70.00 to $70.33 per share. The registrant undertakes to provide, upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Mr. Napier is the managing general partner and a limited partner of HBSA, LP, a limited partnership. Mr. Napier disclaims any beneficial ownership of shares held by HBSA, LP except to the extent of any pecuniary interest therein. /s/ William Alberts by Power of Attorney 2012-12-19