| KIM, LLC | 12,280,426 | $292,888,160 | 26.17% |
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| GEORGE KAISER FAMILY FOUNDATION | 3,167,322 | $75,540,630 | 13.35% |
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| Samjo Management, LLC | 1,038,500 | $24,768,225 | 9.22% |
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| OAKTOP CAPITAL MANAGEMENT II, L.P. | 3,340,525 | $79,671,521 | 8.16% |
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| Firsthand Capital Management, Inc. | 5,000 | $3,374,400 | 6.56% |
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| NEEDHAM INVESTMENT MANAGEMENT LLC | 2,299,729 | $54,848,537 | 4.51% |
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| AWM Investment Company, Inc. | 1,188,202 | $28,338,618 | 3.83% |
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| Telemark Asset Management, LLC | 1,492,424 | $35,594,312 | 3.10% |
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| Encompass Capital Advisors LLC | 1,950,000 | $46,507,500 | 2.52% |
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| Sargent Investment Group, LLC | 317,539 | $7,573,305 | 1.54% |
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| ARDSLEY ADVISORY PARTNERS LP | 400,000 | $9,540,000 | 1.40% |
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| ARDSLEY ADVISORY PARTNERS LP | 395,000 | $9,420,750 | 1.38% |
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| ESSEX INVESTMENT MANAGEMENT CO LLC | 295,116 | $7,038,517 | 1.32% |
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| G2 Investment Partners Management LLC | 198,917 | $4,744,170 | 1.23% |
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| Redwood Grove Capital, LLC | 133,210 | $3,177,059 | 1.00% |
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| Mesirow Institutional Investment Management, Inc. | 418,170 | $9,973,355 | 0.88% |
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| Hood River Capital Management LLC | 1,752,519 | $41,797,578 | 0.87% |
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| Bouvel Investment Partners, LLC | 93,760 | $2,236,176 | 0.86% |
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| Caption Management, LLC | 1,747,200 | $41,670,720 | 0.64% |
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| RICE HALL JAMES & ASSOCIATES, LLC | 446,402 | $10,646,688 | 0.64% |
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