| ARDSLEY ADVISORY PARTNERS LP | 276,000 | $16,720,080 | 3.73% |
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| Arosa Capital Management LP | 187,860 | $11,380,559 | 3.54% |
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| Clear Sky Advisers, LLC | 76,704 | $4,646,728 | 2.42% |
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| Aristotle Capital Boston, LLC | 836,886 | $50,698,553 | 1.64% |
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| Jade Capital Advisors, LLC | 20,000 | $1,211,600 | 1.09% |
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| G2 Investment Partners Management LLC | 72,548 | $4,394,958 | 1.07% |
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| PGGM Investments | 943,291 | $57,145 | 0.99% |
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| Guinness Asset Management LTD | 635,881 | $38,503,837 | 0.89% |
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| Robeco Schweiz AG | 806,220 | $48,840,808 | 0.83% |
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| Green Alpha Advisors, LLC | 14,206 | $860,599 | 0.66% |
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| JOHN G ULLMAN & ASSOCIATES INC | 64,506 | $3,907,773 | 0.64% |
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| Guinness Atkinson Asset Management Inc | 18,882 | $1,143,872 | 0.64% |
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| Sonen Capital LLC | 4,750 | $287,755 | 0.56% |
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| Mitsubishi UFJ Asset Management (UK) Ltd. | 12,000 | $727 | 0.51% |
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| Firsthand Capital Management, Inc. | 5,565 | $337,128 | 0.49% |
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| PINNACLE ASSOCIATES LTD | 397,261 | $24,066,071 | 0.45% |
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| NICOLA WEALTH MANAGEMENT LTD. | 54,000 | $3,271,320 | 0.35% |
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| Wakefield Asset Management LLLP | 10,892 | $659,838 | 0.30% |
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| Employees Retirement System of Texas | 299,000 | $18,113 | 0.27% |
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| BRAUN STACEY ASSOCIATES INC | 89,860 | $5,443 | 0.26% |
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