| Nierenberg Investment Management Company, Inc. | 2,277,840 | $12,983,688 | 9.79% |
|---|
| Hudson Executive Capital LP | 12,245,860 | $69,801,402 | 8.32% |
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| JACOB ASSET MANAGEMENT OF NEW YORK LLC | 601,594 | $3,429,086 | 4.00% |
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| Millrace Asset Group, Inc. | 422,987 | $2,411 | 2.81% |
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| Sargent Investment Group, LLC | 1,810,303 | $10,137,697 | 2.67% |
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| First Washington CORP | 706,172 | $4,025,180 | 1.99% |
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| Mesirow Financial Investment Management, Inc. | 63,165 | $360,041 | 1.49% |
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| PERKINS CAPITAL MANAGEMENT INC | 274,350 | $1,564 | 1.48% |
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| Archon Capital Management LLC | 1,134,718 | $6,467,893 | 1.45% |
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| S Squared Technology, LLC | 408,457 | $2,328,205 | 1.38% |
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| Antara Capital LP | 5,689,100 | $32,427,870 | 1.30% |
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| Abrams Capital Management | 7,180,000 | $40,926,000 | 1.29% |
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| Bullseye Asset Management LLC | 334,186 | $1,905 | 0.97% |
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| TOWERVIEW LLC | 200,000 | $1,140,000 | 0.74% |
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| Trellus Management Company, LLC | 100,200 | $571,140 | 0.67% |
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| FORMULA GROWTH LTD | 302,789 | $1,725,897 | 0.56% |
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| PRECEPT MANAGEMENT LLC | 70,000 | $399,000 | 0.49% |
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| HEARTLAND ADVISORS INC | 900,000 | $5,130,000 | 0.32% |
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| Manatuck Hill Partners, LLC | 100,000 | $570,000 | 0.29% |
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| GREENWOOD CAPITAL ASSOCIATES LLC | 227,182 | $1,294,937 | 0.19% |
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