The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
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COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP FIGI (to the nearest dollar) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
A O SMITH cs 831865209   2,253,482 39,369 SH   SOLE   39,369 0 0
Advanced Drainage Systems Inc cs 00790R104   1,624,318 19,816 SH   SOLE   19,816 0 0
AMERICAN WTR WKS CO cs 030420103   4,336,197 28,449 SH   SOLE   28,449 0 0
Antero Midstream Corporation cs 03676B102   7,854,915 727,981 SH   SOLE   727,981 0 0
Archrock, Inc. cs 03957W106   2,611,995 290,868 SH   SOLE   290,868 0 0
Atmos Energy Corp cs 049560105   113,536 198,365 SH   SOLE   198,365 0 0
Badger Meter, Inc. cs 056525108   22,230,766 9,040 SH   SOLE   9,040 0 0
Cheniere Energy Inc. cs 16411R208   985,631 244,431 SH   SOLE   244,431 0 0
Cheniere Energy Partners LP lp 16411Q101   36,654,878 44,276 SH   SOLE   44,276 0 0
Chesapeake Utilities Corporation cs 165303108   2,517,976 38,560 SH   SOLE   38,560 0 0
Core & Main Inc cs 21874C102   320,912 22,304 SH   SOLE   22,304 0 0
Crestwood Equity Partners LP lp 226344208   430,690 94,183 SH   SOLE   94,183 0 0
CrossAmerica Partners LP lp 22758A105   2,466,653 22,075 SH   SOLE   22,075 0 0
DCP Midstream LP lp 23311P100   437,747 110,608 SH   SOLE   110,608 0 0
Delek Logistics Partners LP lp 24664T103   4,290,484 10,485 SH   SOLE   10,485 0 0
DT Midstream Inc cs 23345M107   474,446 116,728 SH   SOLE   116,728 0 0
Ecolab Inc. cs 278865100   6,450,389 29,567 SH   SOLE   29,567 0 0
Enbridge Inc cs 29250N105   4,303,773 1,112,296 SH   SOLE   1,112,296 0 0
Energy Recovery Inc cs 29270J100   43,490,773 17,231 SH   SOLE   17,231 0 0
Energy Transfer LP lp 29273V100   353,063 1,955,500 SH   SOLE   1,955,500 0 0
Enlink Midstream, LLC lp 29336T100   23,211,785 535,260 SH   SOLE   535,260 0 0
Enterprise Products Partners L.P. lp 293792107   6,583,698 976,111 SH   SOLE   976,111 0 0
Equitrans Midstream Corporation cs 294600101   23,543,797 940,636 SH   SOLE   940,636 0 0
Essential Utilities Inc cs 29670G102   6,302,261 48,521 SH   SOLE   48,521 0 0
Evoqua Water Technologies Corp cs 30057T105   2,315,907 37,523 SH   SOLE   37,523 0 0
Excelerate Energy Inc. cs 30069T101   1,485,911 21,063 SH   SOLE   21,063 0 0
Franklin Electric Co Inc cs 353514102   4,473,943 12,011 SH   SOLE   12,011 0 0
Genesis Energy L.P. lp 371927104   3,617,000 135,612 SH   SOLE   135,612 0 0
Global Partners LP lp 37946R109   5,556,421 33,498 SH   SOLE   33,498 0 0
Hess Midstream LP cs 428103105   1,164,726 53,466 SH   SOLE   53,466 0 0
Holly Energy Partners, L.P. lp 435763107   1,599,703 55,319 SH   SOLE   55,319 0 0
IDEX Corporation cs 45167R104   1,002,380 16,157 SH   SOLE   16,157 0 0
Kinder Morgan Inc cs 49456B101   10,498,276 2,369,589 SH   SOLE   2,369,589 0 0
Kinetik Holdings Inc cs 02215L209   42,842,169 45,385 SH   SOLE   45,385 0 0
Lindsay Corporation cs 535555106   1,372,906 3,391 SH   SOLE   3,391 0 0
Magellan Midstream Partners, LP lp 559080106   1,372,428 247,206 SH   SOLE   247,206 0 0
Montrose Environmental Group cs 615111101   12,412,213 8,434 SH   SOLE   8,434 0 0
MPLX LP lp 55336V100   374,385 435,661 SH   SOLE   435,661 0 0
National Fuel Gas Co cs 636180101   14,307,107 198,825 SH   SOLE   198,825 0 0
New Fortress Energy Inc. cs 644393100   12,585,623 104,364 SH   SOLE   104,364 0 0
New Jersey Resources Corporation cs 646025106   4,427,121 209,149 SH   SOLE   209,149 0 0
Nisource Inc cs 65473P105   10,377,973 841,706 SH   SOLE   841,706 0 0
Northwest Natural Holding Co. cs 66765N105   23,079,579 76,287 SH   SOLE   76,287 0 0
NuStar Energy L.P. lp 67058H102   3,630,498 119,386 SH   SOLE   119,386 0 0
ONE Gas, Inc. cs 68235P108   1,910,176 117,674 SH   SOLE   117,674 0 0
ONEOK, Inc cs 682680103   8,910,275 535,435 SH   SOLE   535,435 0 0
Pembina Pipeline Corp cs 706327103   35,178,080 679,047 SH   SOLE   679,047 0 0
PENTAIR INC cs G7S00T104   865,603 50,795 SH   SOLE   50,795 0 0
Plains All American Pipeline lp 726503105   2,284,759 539,116 SH   SOLE   539,116 0 0
Plains GP Holdings, L.P. cs 72651A207   6,340,004 234,359 SH   SOLE   234,359 0 0
Select Energy Services Inc. cs 81617J301   928,913 23,334 SH   SOLE   23,334 0 0
Sjw Corp cs 784305104   2,247,694 8,222 SH   SOLE   8,222 0 0
South Jersey Industries, Inc. cs 838518108   667,544 266,174 SH   SOLE   266,174 0 0
Southwest Gas Corporation cs 844895102   9,457,162 134,109 SH   SOLE   134,109 0 0
Spire Inc cs 84857L101   8,298,665 114,092 SH   SOLE   114,092 0 0
Sunoco LP lp 86765K109   7,856,375 66,687 SH   SOLE   66,687 0 0
Targa Resources Corp. cs 87612G101   2,874,210 339,653 SH   SOLE   339,653 0 0
TC Energy Corp. cs 87807B107   24,964,496 1,027,017 SH   SOLE   1,027,017 0 0
Tetra Tech, Inc. cs 88162G103   40,936,898 15,321 SH   SOLE   15,321 0 0
USA Compression Partners LP lp 90290N109   1,210,294 61,971 SH   SOLE   61,971 0 0
Watts Water Technologies, Inc. cs 942749102   1,233,304 8,434 SH   SOLE   8,434 0 0
Western Midstream Partners LP lp 958669103   6,235,832 232,247 SH   SOLE   232,247 0 0
WILLIAMS COS INC cs 969457100   42,492,719 1,291,572 SH   SOLE   1,291,572 0 0
Xylem Inc. cs 98419M100   4,264,795 38,571 SH   SOLE   38,571 0 0
Zurn Elkay Water Solutions Corporation cs 98983L108   952,110 45,017 SH   SOLE   45,017 0 0