| ClearBridge Investments Ltd | 6,555,202 | $243,066,890 | 7.10% |
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| Recurrent Investment Advisors LLC | 1,596,628 | $59,654,406 | 6.28% |
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| Heronetta Management, L.P. | 191,698 | $9,488,482 | 6.07% |
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| CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT | 1,429,805 | $53,017,169 | 4.20% |
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| Cardinal Capital Management, Inc. | 2,885,088 | $106,979,613 | 4.11% |
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| LINCLUDEN MANAGEMENT LTD | 817,061 | $30,337 | 3.68% |
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| KAYNE ANDERSON CAPITAL ADVISORS LP | 3,604,707 | $133,662,536 | 3.59% |
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| MORGAN DEMPSEY CAPITAL MANAGEMENT LLC | 260,286 | $9,651,401 | 3.22% |
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| Triasima Portfolio Management inc. | 784,516 | $29,094,784 | 2.66% |
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| A. D. Beadell Investment Counsel, Inc. | 85,536 | $3,171 | 2.65% |
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| SIG North Trading, ULC | 1,671,800 | $61,990,344 | 2.60% |
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| Ausbil Investment Management Ltd | 149,818 | $5,557,614 | 2.56% |
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| KRAEMATON INVESTMENT ADVISORS, INC | 63,435 | $2,352,173 | 2.39% |
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| TORTOISE CAPITAL ADVISORS, L.L.C. | 4,542,997 | $168,512,498 | 2.23% |
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| SL ADVISORS, LLC | 25,590 | $948,877 | 1.88% |
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| CASCADE INVESTMENT GROUP, INC. | 64,268 | $2,383,058 | 1.86% |
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| INTACT INVESTMENT MANAGEMENT INC. | 1,078,994 | $40,030,504 | 1.50% |
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| SIG North Trading, ULC | 943,000 | $34,966,440 | 1.47% |
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| Silver Lake Advisory, LLC | 86,296 | $3,199,856 | 1.44% |
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| Tacita Capital Inc | 53,434 | $1,981,350 | 1.40% |
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