| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Ameriprise Financial, Inc. | 11% | 6,019,660 | 0 | 5,670,975 | /s/ Michael G. Clarke | Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services | |
| Columbia Management Investment Advisers, LLC | 10% | 5,869,661 | 0 | 5,670,975 | /s/ Michael G. Clarke | Michael G. Clarke, Senior Vice President, North America Head of Operations & Investor Services | |
| Columbia Seligman Technology and Information Fund | 6.7% | 3,720,492 | 3,720,492 | 0 | /s/ Michael G. Clarke | Michael G. Clarke, Senior Vice President & Chief Financial Officer |