Exhibit 31.2
CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF THE SECURITIES
EXCHANGE
ACT OF 1934, AS ADOPTED PURSUANT TO SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002
I, Bruce R. Knooihuizen, certify that:
1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of Rackspace Hosting, Inc.;
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3. [This certification is intentionally omitted because this amendment does not contain financial statements or other financial information.];
4. [This certification is intentionally omitted because this amendment does not contain or amend disclosure pursuant to Item 307 or 308 of Regulation S-K, and such disclosure is not otherwise required to be amended given the nature and reasons for the amendment.]; and
5. [This certification is intentionally omitted because this amendment does not contain or amend disclosure pursuant to Item 307 or 308 of Regulation S-K, and such disclosure is not otherwise required to be amended given the nature and reasons for the amendment.].
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| Date: July 19, 2010 | | | | By: | | /s/ Bruce R. Knooihuizen |
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| | | | | | | Bruce R. Knooihuizen |
| | | | | | | Chief Financial Officer, Senior Vice President, and Treasurer |
| | | | | | | (Principal Financial Officer) |
