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 (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Advanced Drainage Systems Inc. COM 00790R104 39 1,607 SH   SOLE   1,607 0 0
Aegion Corp. COM 00770F104 21 1,262 SH   SOLE   1,262 0 0
Altus Midstream Company CL A 02215L100 156 20,168 SH   SOLE   20,168 0 0
American States Water Company COM 029899101 96 1,436 SH   SOLE   1,436 0 0
American Water Works Company COM 030420103 281 3,097 SH   SOLE   3,097 0 0
Andeavor Logistics, L.P. COM UNIT LP INT 03350F106 1,047 32,210 SH   SOLE   32,210 0 0
Antero Midstream GP, L.P. COM SHS REPSTG 03675Y103 333 29,752 SH   SOLE   29,752 0 0
Antero Midstream Partners, L.P. UNT LTD PARTN 03673L103 685 32,018 SH   SOLE   32,018 0 0
Aqua America, Inc. COM 03836W103 155 4,536 SH   SOLE   4,536 0 0
Aquaventure Holdings Ltd SHS G0443N107 10 510 SH   SOLE   510 0 0
Archrock, Inc. COM 03957W106 1,076 143,681 SH   SOLE   143,681 0 0
Atmos Energy Corp. COM 049560105 11,966 129,060 SH   SOLE   129,060 0 0
Badger Meter, Inc. COM 056525108 56 1,136 SH   SOLE   1,136 0 0
BP Midstream Partners, L.P. UNIT LTD PTNR 0556EL109 259 16,658 SH   SOLE   16,658 0 0
Buckeye Partners, L.P. UNIT LTD PARTN 118230101 1,553 53,570 SH   SOLE   53,570 0 0
California Water Service Group COM 130788102 89 1,877 SH   SOLE   1,877 0 0
Cheniere Energy, Inc. COM 16411R208 14,463 244,348 SH   SOLE   244,348 0 0
Cheniere Energy Partners, L.P. COM UNIT 16411Q101 551 15,253 SH   SOLE   15,253 0 0
Chesapeake Utilities Corporation COM 165303108 1,470 18,084 SH   SOLE   18,084 0 0
Cia de Saneamento Basico do Es SPONSORED ADR 20441A102 108 13,358 SH   SOLE   13,358 0 0
CNX Midstream Partners, L.P. COM UNIT REPST 12654A101 152 9,326 SH   SOLE   9,326 0 0
Connecticut Water Service, Inc. COM 207797101 31 471 SH   SOLE   471 0 0
Crestwood Equity Partners, L.P. UNIT LTD PARTNER 226344208 491 17,609 SH   SOLE   17,609 0 0
CrossAmerica Partners, L.P. UT LTD PTN INT 22758A105 146 10,294 SH   SOLE   10,294 0 0
DCP Midstream, L.P. COM UT LTD PTN 23311P100 871 32,877 SH   SOLE   32,877 0 0
Delek Logistics Partners, L.P. COM UNT RP INT 24664T103 85 2,903 SH   SOLE   2,903 0 0
Dominion Energy Midstream Partners COM UT REP LTD 257454108 324 17,942 SH   SOLE   17,942 0 0
Enable Midstream Partners, L.P. COM UNIT RP IN 292480100 204 15,092 SH   SOLE   15,092 0 0
Enbridge, Inc. COM 29250N105 22,330 718,482 SH   SOLE   718,482 0 0
Energy Transfer, L.P. COM UT LTD PTN 29273V100 11,353 859,412 SH   SOLE   859,412 0 0
Enlink Midstream Partners, L.P. COM UNIT REP LTD 29336U107 1,399 127,068 SH   SOLE   127,068 0 0
Enlink Midstream, L.L.C. COM UNIT REP LTD 29336T100 667 70,297 SH   SOLE   70,297 0 0
Enterprise Products Partners, L.P. COM 293792107 13,311 541,301 SH   SOLE   541,301 0 0
EQGP Holdings, L.P. COM UNIT REP 26885J103 197 9,870 SH   SOLE   9,870 0 0
EQM Midstream Partners, L.P. UNIT LTD PARTN 26885B100 1,024 23,680 SH   SOLE   23,680 0 0
Equitrans Midstream Corporation COM 294600101 1,448 72,329 SH   SOLE   72,329 0 0
Evoqua Water Technologies Corp. COM 30057T105 22 2,272 SH   SOLE   2,272 0 0
Franklin Electric Co, Inc. COM 353514102 65 1,514 SH   SOLE   1,514 0 0
Genesis Energy, L.P. UNIT LTD PARTN 371927104 725 39,269 SH   SOLE   39,269 0 0
Global Partners, L.P. COM UNITS 37946R109 155 9,527 SH   SOLE   9,527 0 0
Hess Midstream Partners, L.P. UNIT LTD PR INT 428104103 92 5,417 SH   SOLE   5,417 0 0
Holly Energy Partners, L.P. COM UT LTD PTN 435763107 471 16,486 SH   SOLE   16,486 0 0
Kinder Morgan, Inc. COM 49456B101 21,516 1,398,929 SH   SOLE   1,398,929 0 0
Magellan Midstream Partners, L.P. COM UNIT RP LP 559080106 4,748 83,210 SH   SOLE   83,210 0 0
Middlesex Water Co. COM 596680108 34 639 SH   SOLE   639 0 0
MPLX, L.P. COM UNIT REP LTD 55336V100 3,159 104,242 SH   SOLE   104,242 0 0
Mueller Water Products, Inc. COM SER A 624758108 56 6,155 SH   SOLE   6,155 0 0
National Fuel Gas Co. COM 636180101 4,859 94,949 SH   SOLE   94,949 0 0
New Jersey Resources Corporation COM 646025106 4,465 97,772 SH   SOLE   97,772 0 0
Nisource, Inc. COM 65473P105 10,190 401,960 SH   SOLE   401,960 0 0
Noble Midstream Partners, L.P. COM UNIT REPST 65506L105 217 7,526 SH   SOLE   7,526 0 0
Northwest Natural Holding Co. COM 66765N105 1,925 31,843 SH   SOLE   31,843 0 0
NuStar Energy, L.P. UNIT COM 67058H102 686 32,767 SH   SOLE   32,767 0 0
Oasis Midstream Partners, L.P. COM UNITS REPS 67420T206 63 3,913 SH   SOLE   3,913 0 0
ONE Gas, Inc. COM 68235P108 4,615 57,980 SH   SOLE   57,980 0 0
ONEOK, Inc. COM 682680103 20,525 380,453 SH   SOLE   380,453 0 0
PBF Logistics, L.P. UNIT LTD PTNR 69318Q104 157 7,835 SH   SOLE   7,835 0 0
Pembina Pipeline Corp. COM 706327103 16,612 559,841 SH   SOLE   559,841 0 0
Pentair plc SHS G7S00T104 153 4,050 SH   SOLE   4,050 0 0
Phillips 66 Partners, L.P. COM UNIT REP INT 718549207 810 19,239 SH   SOLE   19,239 0 0
Plains All American Pipeline, L.P. UNIT LTD PARTN 726503105 3,184 158,904 SH   SOLE   158,904 0 0
Plains GP Holdings, L.P. LTD PARTNR INT A 72651A207 3,513 174,757 SH   SOLE   174,757 0 0
Rexnord Corp. COM 76169B102 94 4,089 SH   SOLE   4,089 0 0
Semgroup Corp. CL A 81663A105 1,002 72,709 SH   SOLE   72,709 0 0
Shell Midstream Partners, L.P. UNIT LTD INT 822634101 737 44,895 SH   SOLE   44,895 0 0
Sjw Corp. COM 784305104 49 887 SH   SOLE   887 0 0
South Jersey Industries, Inc. COM 838518108 2,626 94,463 SH   SOLE   94,463 0 0
Southwest Gas Corporation COM 844895102 4,472 58,459 SH   SOLE   58,459 0 0
Spire, Inc. COM 84857L101 4,151 56,038 SH   SOLE   56,038 0 0
Sprague Resources, L.P. COM UNIT REP LTD 849343108 50 3,441 SH   SOLE   3,441 0 0
Summit Midstream Partners, L.P. COM UNIT LTD 866142102 145 14,414 SH   SOLE   14,414 0 0
Sunoco, L.P. COM U REP LP 86765K109 555 20,405 SH   SOLE   20,405 0 0
Tallgrass Energy, L.P. CLASS A SHS 874696107 3,766 154,744 SH   SOLE   154,744 0 0
Targa Resources Corp. COM 87612G101 9,134 253,568 SH   SOLE   253,568 0 0
TC PipeLines, L.P. UT COM LTD PRT 87233Q108 617 19,211 SH   SOLE   19,211 0 0
The York Water Co. COM 987184108 16 504 SH   SOLE   504 0 0
Tortoise North American Pipeline TORTOISE NRAM PI 56167N720 82 4,100 SH   SOLE   4,100 0 0
Transcanada Corp. COM 89353D107 20,350 570,039 SH   SOLE   570,039 0 0
Transmontaigne Partners, L.P. COM UNIT L P 89376V100 192 4,726 SH   SOLE   4,726 0 0
USA Compression Partners, L.P. COMUNIT LTDPAR 90290N109 152 11,718 SH   SOLE   11,718 0 0
USD Partners, L.P. COM UT REP LTD 903318103 42 4,005 SH   SOLE   4,005 0 0
Valero Energy Partners, L.P. COM 91914J102 340 8,072 SH   SOLE   8,072 0 0
Watts Water Technologies, Inc. CL A 942749102 70 1,085 SH   SOLE   1,085 0 0
Western Gas Equity Partners, L.P. COMUNIT LTD PT 95825R103 486 17,539 SH   SOLE   17,539 0 0
Western Gas Partners, L.P. COM UNIT LP IN 958254104 1,550 36,699 SH   SOLE   36,699 0 0
Williams Companies, Inc. COM 969457100 20,674 937,577 SH   SOLE   937,577 0 0
Xylem, Inc. COM 98419M100 306 4,581 SH   SOLE   4,581 0 0