| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT L.L.C. | 7.8% | 3,325,000 | 0 | 3,325,000 | By: /s/ James W. Giangrasso | James W. Giangrasso, Chief Financial Officer | |
| NEEDHAM ASSET MANAGEMENT, LLC | 7.8% | 3,325,000 | 0 | 3,325,000 | By: /s/ James W. Giangrasso | James W. Giangrasso, Authorized Person | |
| NEEDHAM AGGRESSIVE GROWTH FUND | 6.2% | 2,650,000 | 0 | 2,650,000 | By: /s/ James W. Giangrasso | James W. Giangrasso, Chief Financial Officer | |
| GEORGE A. NEEDHAM | 7.8% | 3,325,000 | 0 | 3,325,000 | By: /s/ George A. Needham | George A. Needham |