| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Needham Investment Management L.L.C. | 6.1% | 5,875,000 | 0 | 5,875,000 | /s/ James W. Giangrasso | James W. Giangrasso/Chief Financial Officer | |
| Needham Asset Management, LLC | 6.1% | 5,875,000 | 0 | 5,875,000 | /s/ James W. Giangrasso | James W. Giangrasso/Authorized Person | |
| Needham Aggressive Growth Fund | 6.1% | 5,875,000 | 0 | 5,875,000 | /s/ James W. Giangrasso | James W. Giangrasso/Chief Financial Officer | |
| George A. Needham | 6.1% | 5,875,000 | 0 | 5,875,000 | /s/ George A. Needham | George A. Needham |