| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT L.L.C. | 4% | 1,174,300 | 0 | 1,174,300 | By: /s/ James W. Giangrasso | James W. Giangrasso, Chief Financial Officer | |
| NEEDHAM ASSET MANAGEMENT, LLC | 4% | 1,174,300 | 0 | 1,174,300 | By: /s/ James W. Giangrasso | James W. Giangrasso, Authorized Person | |
| NEEDHAM AGGRESSIVE GROWTH FUND | 3.4% | 1,019,500 | 0 | 1,019,500 | By: /s/ James W. Giangrasso | James W. Giangrasso, Chief Financial Officer | |
| GEORGE A. NEEDHAM | 4% | 1,174,300 | 0 | 1,174,300 | By: /s/ George A. Needham | George A. Needham |