| AIGH Capital Management LLC | 1,008,469 | $40.1m | 2.5% |
| BlackRock, Inc. | 957,424 | $38.1m | 0.0% |
| ACK Asset Management LLC | 810,200 | $32.2m | 3.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 481,816 | $19.2m | 0.0% |
| MAIRS & POWER INC | 385,257 | $15.3m | 0.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 371,245 | $14.8m | 0.0% |
| STATE STREET CORP | 363,209 | $14.5m | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 357,104 | $14.2m | 0.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 302,039 | $12.0m | 0.0% |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | 277,610 | $11.0m | 0.5% |
| ROYAL BANK OF CANADA | 262,147 | $10.4m | 0.0% |
| ROYCE & ASSOCIATES LP | 256,990 | $10.2m | 0.1% |
| D. E. Shaw & Co., Inc. | 227,722 | $9.1m | 0.0% |
| ACADIAN ASSET MANAGEMENT LLC | 173,069 | $6.9m | 0.0% |
| Dana Investment Advisors, Inc. | 161,550 | $6.4m | 0.2% |
| JPMORGAN CHASE & CO | 164,458 | $6.4m | 0.0% |
| MILLENNIUM MANAGEMENT LLC | 142,431 | $5.7m | 0.0% |
| GOLDMAN SACHS GROUP INC | 139,129 | $5.5m | 0.0% |
| CITADEL ADVISORS LLC | 131,916 | $5.2m | 0.0% |
| Divisadero Street Capital Management, LP | 130,783 | $5.2m | 0.1% |
| NORTHERN TRUST CORP | 125,744 | $5.0m | 0.0% |
| MARSHALL WACE, LLP | 112,403 | $4.5m | 0.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 99,389 | $4.0m | 0.0% |
| LAZARD ASSET MANAGEMENT LLC | 82,680 | $3.3m | 0.0% |
| BANK OF AMERICA CORP /DE/ | 79,275 | $3.2m | 0.0% |