| Gilder, Gagnon, Howe & Co. LLC | 7.68% | 3,258,755 | 12,937,257 | +3,258,755 | -- |
| Bankers Trust Co. (Iowa) | 1.57% | 666,084 | 2,644,353 | 0 | 0.00% |
| Satuit Capital Management LLC | 0.79% | 334,000 | 1,325,980 | +334,000 | -- |
| Gruber & McBaine Capital Manageme... | 0.69% | 291,082 | 1,155,596 | +291,082 | -- |
| Mesirow Financial Investment Mana... | 0.11% | 45,197 | 179,432 | +45,197 | -- |