| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | 8% | 5,559,800 | 0 | 5,559,800 | By: /s/ James W. Giangrasso | James W. Giangrasso / Chief Financial Officer | |
| NEEDHAM ASSET MANAGEMENT, LLC | 8% | 5,559,800 | 0 | 5,559,800 | By: /s/ James W. Giangrasso | James W. Giangrasso / Authorized Person | |
| NEEDHAM AGGRESSIVE GROWTH FUND | 6.6% | 4,568,000 | 0 | 4,568,000 | By: /s/ James W. Giangrasso | James W. Giangrasso / Chief Financial Officer | |
| GEORGE A. NEEDHAM | 8% | 5,559,800 | 0 | 5,559,800 | By: /s/ George A. Needham | George A. Needham |