| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| NEEDHAM INVESTMENT MANAGEMENT LLC | 9.1% | 700K | 0 | 700K | By: /s/ James W. Giangrasso | James W. Giangrasso/Chief Financial Officer | |
| Needham Asset Management, LLC | 9.1% | 700K | 0 | 700K | By: /s/ James W. Giangrasso | James W. Giangrasso/Authorized Person | |
| Needham Aggressive Growth Fund | 9.1% | 700K | 0 | 700K | By: /s/ James W. Giangrasso | James W. Giangrasso/Chief Financial Officer | |
| George A. Needham | 9.1% | 700K | 0 | 700K | By: /s/ George A. Needham | George A. Needham |