| Casdin Capital, LLC | 7,780,000 | $107,441,800 | 11.89% |
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| Gagnon Advisors, LLC | 360,758 | $4,982,067 | 4.17% |
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| Meros Investment Management, LP | 372,203 | $5,140,123 | 2.80% |
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| Park West Asset Management LLC | 2,014,954 | $27,826,515 | 2.56% |
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| GAGNON SECURITIES LLC | 633,363 | $8,746,743 | 2.19% |
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| Mesirow Financial Investment Management, Inc. | 26,710 | $368,865 | 1.60% |
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| Roubaix Capital, LLC | 146,898 | $2,028,661 | 1.50% |
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| Millrace Asset Group, Inc. | 48,917 | $676 | 0.84% |
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| Soleus Capital Management, L.P. | 439,000 | $6,062,590 | 0.56% |
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| PALISADE CAPITAL MANAGEMENT, LP | 1,363,638 | $18,831,841 | 0.53% |
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| Granahan Investment Management | 1,052,674 | $14,537,428 | 0.52% |
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| GENEVA CAPITAL MANAGEMENT LLC | 1,525,391 | $21,065,656 | 0.44% |
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| PEOPLES BANK /OH | 48,775 | $673,583 | 0.44% |
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| PERKINS CAPITAL MANAGEMENT INC | 31,000 | $428 | 0.42% |
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| Penbrook Management LLC | 41,500 | $573,115 | 0.42% |
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| Pier Capital, LLC | 172,156 | $2,377,474 | 0.38% |
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| Ranger Investment Management | 340,668 | $4,704,625 | 0.31% |
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| Zweig-DiMenna Associates LLC | 181,320 | $2,504,029 | 0.30% |
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| Uniplan Investment Counsel, Inc. | 261,079 | $3,668 | 0.28% |
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| Hood River Capital Management LLC | 598,377 | $8,263,586 | 0.26% |
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