| A. D. Beadell Investment Counsel, Inc. | 112,290 | $5,602 | 4.68% |
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| DECADE RENEWABLE PARTNERS LP | 192,100 | $9,583,869 | 4.68% |
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| VALUE HOLDINGS MANAGEMENT CO. LLC | 461,675 | $23,033 | 4.21% |
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| Arosa Capital Management LP | 142,600 | $7,114,314 | 4.11% |
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| Diameter Capital Partners LP | 663,061 | $33,080,113 | 3.90% |
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| BRUNI J V & CO /CO | 582,317 | $29,051,795 | 3.62% |
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| Tieton Capital Management, LLC | 130,445 | $6,508 | 3.62% |
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| Bayberry Capital Partners LP | 336,000 | $16,763,040 | 3.36% |
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| 12th Street Asset Management Company, LLC | 273,734 | $13,656,589 | 2.49% |
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| Van Berkom & Associates Inc. | 1,382,632 | $68,980 | 2.06% |
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| 1492 Capital Management LLC | 63,103 | $3,148,209 | 1.78% |
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| ESSEX INVESTMENT MANAGEMENT CO LLC | 154,415 | $7,703,764 | 1.44% |
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| Yaupon Capital Management LP | 545,190 | $27,199,529 | 1.38% |
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| Tabor Asset Management, LP | 45,140 | $2,549,056 | 1.36% |
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| EAM Global Investors LLC | 111,555 | $5,565,479 | 1.25% |
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| HANSEATIC MANAGEMENT SERVICES INC | 16,133 | $804,875 | 1.21% |
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| Keeley-Teton Advisors, LLC | 168,613 | $8,412,103 | 1.08% |
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| Intrinsic Edge Capital Management LLC | 236,776 | $11,812,755 | 1.07% |
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| Ausbil Investment Management Ltd | 44,190 | $2,204,639 | 1.02% |
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| Covalis Capital LLP | 137,131 | $6,841,466 | 0.93% |
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