| BlackRock, Inc. | 9,353,236 | $120.7m | 0.0% |
| AIGH Capital Management LLC | 6,548,450 | $84.5m | 5.3% |
| D. E. Shaw & Co., Inc. | 5,071,927 | $65.4m | 0.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 4,981,106 | $64.3m | 0.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4,315,867 | $55.7m | 0.0% |
| Granahan Investment Management, LLC | 3,494,200 | $45.1m | 1.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 2,914,508 | $37.6m | 0.0% |
| TWO SIGMA INVESTMENTS, LP | 2,803,368 | $36.2m | 0.0% |
| STATE STREET CORP | 2,650,488 | $34.2m | 0.0% |
| BANK OF AMERICA CORP /DE/ | 2,617,867 | $33.8m | 0.0% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2,382,180 | $30.7m | 0.0% |
| Invesco Ltd. | 2,237,315 | $28.9m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 2,030,466 | $26.2m | 0.0% |
| RENAISSANCE TECHNOLOGIES LLC | 2,003,000 | $25.8m | 0.0% |
| UBS Group AG | 1,733,765 | $22.4m | 0.0% |
| JANE STREET GROUP, LLC | 1,732,561 | $22.4m | 0.0% |
| GOLDMAN SACHS GROUP INC | 1,349,350 | $17.4m | 0.0% |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | 1,053,466 | $13.6m | 0.1% |
| Manatuck Hill Partners, LLC | 1,043,461 | $13.5m | 4.5% |
| Nuveen, LLC | 998,579 | $12.9m | 0.0% |
| NORTHERN TRUST CORP | 960,262 | $12.4m | 0.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 912,048 | $11.8m | 0.0% |
| AQR CAPITAL MANAGEMENT LLC | 883,138 | $11.4m | 0.0% |
| TUDOR INVESTMENT CORP ET AL | 794,888 | $10.3m | 0.0% |
| JPMORGAN CHASE & CO | 750,080 | $9.7m | 0.0% |