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
A10 Networks, Inc. COM 002121101 3 400 SH   SOLE   400 0 0
Aci Worldwide, Inc. COM 004498101 55 1,677 SH   SOLE   1,677 0 0
Advanced Drainage Systems, Inc. COM 00790R104 40 1,557 SH   SOLE   1,557 0 0
Aegion Corp. COM 00770F104 21 1,197 SH   SOLE   1,197 0 0
Akamai Technologies, Inc. DBCV 00971T101 80 1,121 SH   SOLE   1,121 0 0
Alibaba Group Holding Ltd. SPONSORED ADS 01609W102 115 633 SH   SOLE   633 0 0
Alphabet, Inc. CAP STK CL A 02079K305 115 98 SH   SOLE   98 0 0
Altus Midstream Company CL A 02215L100 377 63,933 SH   SOLE   63,933 0 0
Amazon.Com, Inc. COM 023135106 121 68 SH   SOLE   68 0 0
American Express Co. COM 025816109 180 1,646 SH   SOLE   1,646 0 0
American States Water Company COM 029899101 99 1,395 SH   SOLE   1,395 0 0
American Water Works Company COM 030420103 333 3,193 SH   SOLE   3,193 0 0
Andeavor Logistics, L.P. COM UNIT LP INT 03350F106 1,333 37,807 SH   SOLE   37,807 0 0
Antero Midstream Corporation COM 03676B102 1,341 97,328 SH   SOLE   97,328 0 0
Aqua America, Inc. COM 03836W103 178 4,890 SH   SOLE   4,890 0 0
Aquaventure Holdings Ltd. SHS G0443N107 10 497 SH   SOLE   497 0 0
Archrock, Inc. COM 03957W106 1,415 144,706 SH   SOLE   144,706 0 0
Atmos Energy Corp. COM 049560105 13,338 129,579 SH   SOLE   129,579 0 0
Badger Meter, Inc. COM 056525108 61 1,096 SH   SOLE   1,096 0 0
Bottomline Technologies De, Inc. COM 101388106 31 625 SH   SOLE   625 0 0
Box, Inc. CL A 10316T104 18 935 SH   SOLE   935 0 0
BP Midstream Partners, L.P. UNIT LTD PTNR 0556EL109 250 17,261 SH   SOLE   17,261 0 0
Buckeye Partners, L.P. UNIT LTD PARTN 118230101 2,238 65,797 SH   SOLE   65,797 0 0
California Water Service Group COM 130788102 99 1,826 SH   SOLE   1,826 0 0
Carbon Black, Inc. COM 14081R103 5 368 SH   SOLE   368 0 0
Carbonite, Inc. COM 141337105 6 225 SH   SOLE   225 0 0
Cass Information Systems, Inc. COM 14808P109 9 192 SH   SOLE   192 0 0
Check Point Software Technology ORD M22465104 112 883 SH   SOLE   883 0 0
Cheniere Energy, Inc. COM 16411R208 16,760 245,173 SH   SOLE   245,173 0 0
Cheniere Energy Partners, L.P. COM UNIT 16411Q101 750 17,895 SH   SOLE   17,895 0 0
Chesapeake Utilities Corporation COM 165303108 1,640 17,981 SH   SOLE   17,981 0 0
Cia de Saneamento Basico do Estado Sao Paulo SPONSORED ADR 20441A102 137 12,985 SH   SOLE   12,985 0 0
Cisco Systems, Inc. COM 17275R102 122 2,256 SH   SOLE   2,256 0 0
Citrix Systems, Inc. COM 177376100 85 854 SH   SOLE   854 0 0
CNX Midstream Partners, L.P. COM UNIT REPST 12654A101 147 9,666 SH   SOLE   9,666 0 0
Commvault Systems, Inc. COM 204166102 19 295 SH   SOLE   295 0 0
Connecticut Water Service, Inc. COM 207797101 31 449 SH   SOLE   449 0 0
Coresite Realty Corp. COM 21870Q105 28 262 SH   SOLE   262 0 0
Crestwood Equity Partners, L.P. UNIT LTD PARTNER 226344208 729 20,715 SH   SOLE   20,715 0 0
CrossAmerica Partners, L.P. UT LTD PTN INT 22758A105 195 10,666 SH   SOLE   10,666 0 0
Csg Systems International, Inc. COM 126349109 20 477 SH   SOLE   477 0 0
Cyrusone, Inc. COM 23283R100 40 756 SH   SOLE   756 0 0
DCP Midstream, L.P. COM UT LTD PTN 23311P100 1,277 38,627 SH   SOLE   38,627 0 0
Delek Logistics Partners, L.P. COM UNT RP INT 24664T103 98 3,007 SH   SOLE   3,007 0 0
Digital Realty Trust, Inc. COM 253868103 123 1,035 SH   SOLE   1,035 0 0
Discover Financial Services COM 254709108 179 2,516 SH   SOLE   2,516 0 0
Docusign, Inc. COM 256163106 76 1,475 SH   SOLE   1,475 0 0
Dropbox, Inc. CL A 26210C104 29 1,332 SH   SOLE   1,332 0 0
Elastic Nv ORD SHS N14506104 5 62 SH   SOLE   62 0 0
Ellie Mae, Inc. COM 28849P100 50 504 SH   SOLE   504 0 0
Enable Midstream Partners, L.P. COM UNIT RP IN 292480100 224 15,636 SH   SOLE   15,636 0 0
Enbridge, Inc. COM 29250N105 25,190 694,704 SH   SOLE   694,704 0 0
Energy Transfer, L.P. COM UT LTD PTN 29273V100 15,489 1,007,714 SH   SOLE   1,007,714 0 0
Enlink Midstream, L.L.C COM UNIT REP LTD 29336T100 3,659 286,273 SH   SOLE   286,273 0 0
Enterprise Products Partners, L.P. COM 293792107 18,478 634,993 SH   SOLE   634,993 0 0
EQM Midstream Partners, L.P. UNIT LTD PARTN 26885B100 1,285 27,823 SH   SOLE   27,823 0 0
Equinix, Inc. COM 29444U700 124 273 SH   SOLE   273 0 0
Equitrans Midstream Corporation COM 294600101 4,917 225,764 SH   SOLE   225,764 0 0
Euronet Worldwide, Inc. COM 298736109 105 736 SH   SOLE   736 0 0
Evertec, Inc. COM 30040P103 24 874 SH   SOLE   874 0 0
Evo Payments, Inc. CL A COM 26927E104 11 363 SH   SOLE   363 0 0
Evoqua Water Technologies Corp. COM 30057T105 28 2,197 SH   SOLE   2,197 0 0
F5 Networks, Inc. COM 315616102 66 419 SH   SOLE   419 0 0
Fidelity National Information COM 31620M106 190 1,682 SH   SOLE   1,682 0 0
First Data Corp. COM CL A 32008D106 186 7,069 SH   SOLE   7,069 0 0
Fiserv, Inc. COM 337738108 186 2,102 SH   SOLE   2,102 0 0
Fleetcor Technologies, Inc COM 339041105 191 775 SH   SOLE   775 0 0
Fortinet, Inc. COM 34959E109 86 1,029 SH   SOLE   1,029 0 0
Franklin Electric Co, Inc. COM 353514102 74 1,457 SH   SOLE   1,457 0 0
Genesis Energy, L.P. UNIT LTD PARTN 371927104 1,075 46,146 SH   SOLE   46,146 0 0
Global Partners, L.P. COM UNITS 37946R109 194 9,876 SH   SOLE   9,876 0 0
Global Payments, Inc. COM 37940X102 189 1,384 SH   SOLE   1,384 0 0
Green Dot Corp. CL A 39304D102 43 715 SH   SOLE   715 0 0
Greensky, Inc. CL A 39572G100 9 682 SH   SOLE   682 0 0
Hess Midstream Partners, L.P. UNIT LTD PR INT 428104103 119 5,621 SH   SOLE   5,621 0 0
Hewlett Packard Enterprise Co. COM 42824C109 113 7,307 SH   SOLE   7,307 0 0
Holly Energy Partners, L.P. COM UT LTD PTN 435763107 523 19,389 SH   SOLE   19,389 0 0
International Business Machine COM 459200101 120 850 SH   SOLE   850 0 0
Interxion Holding Nv SHS N47279109 33 497 SH   SOLE   497 0 0
J2 Global, Inc. COM 48123V102 28 323 SH   SOLE   323 0 0
Jack Henry & Associates, Inc. COM 426281101 157 1,135 SH   SOLE   1,135 0 0
Juniper Networks, Inc. COM 48203R104 64 2,405 SH   SOLE   2,405 0 0
Kinder Morgan, Inc. COM 49456B101 25,072 1,252,978 SH   SOLE   1,252,978 0 0
Lendingclub Corp. COM 52603A109 19 6,216 SH   SOLE   6,216 0 0
Magellan Midstream Partners, L.P. COM UNIT RP LP 559080106 5,925 97,716 SH   SOLE   97,716 0 0
MasterCard Incorporated CL A 57636Q104 125 533 SH   SOLE   533 0 0
Microsoft Corp. COM 594918104 123 1,043 SH   SOLE   1,043 0 0
Middlesex Water Co. COM 596680108 35 619 SH   SOLE   619 0 0
Mobileiron, Inc. COM 60739U204 3 572 SH   SOLE   572 0 0
MPLX, L.P. COM UNIT REP LTD 55336V100 4,022 122,287 SH   SOLE   122,287 0 0
Mueller Water Products, Inc. COM SER A 624758108 60 5,995 SH   SOLE   5,995 0 0
National Fuel Gas Co. COM 636180101 5,829 95,615 SH   SOLE   95,615 0 0
Ncr Corp. COM 62886E108 47 1,739 SH   SOLE   1,739 0 0
Netapp, Inc. COM 64110D104 121 1,743 SH   SOLE   1,743 0 0
Netscout Systems, Inc. COM 64115T104 15 528 SH   SOLE   528 0 0
New Fortress Energy, L.L.C CL A SHS RP LLC 644393100 257 21,977 SH   SOLE   21,977 0 0
New Jersey Resources Corporation COM 646025106 4,903 98,469 SH   SOLE   98,469 0 0
Nisource, Inc. COM 65473P105 11,853 413,563 SH   SOLE   413,563 0 0
Noble Midstream Partners, L.P. COM UNIT REPST 65506L105 335 9,296 SH   SOLE   9,296 0 0
Northwest Natural Holding Co. COM 66765N105 2,098 31,967 SH   SOLE   31,967 0 0
NuStar Energy, L.P. UNIT COM 67058H102 1,034 38,465 SH   SOLE   38,465 0 0
Nutanix, Inc. CL A 67059N108 37 972 SH   SOLE   972 0 0
Oasis Midstream Partners, L.P. COM UNITS REPS 67420T206 82 4,049 SH   SOLE   4,049 0 0
Okta, Inc. CL A 679295105 55 670 SH   SOLE   670 0 0
ONE Gas, Inc. COM 68235P108 5,184 58,225 SH   SOLE   58,225 0 0
ONEOK, Inc COM 682680103 26,751 383,029 SH   SOLE   383,029 0 0
Onespan, Inc. COM 68287N100 9 471 SH   SOLE   471 0 0
Oracle Corp. COM 68389X105 120 2,226 SH   SOLE   2,226 0 0
Pagseguro Digital Ltd. COM CL A G68707101 71 2,390 SH   SOLE   2,390 0 0
Paypal Holdings, Inc. COM 70450Y103 193 1,859 SH   SOLE   1,859 0 0
PBF Logistics, L.P. UNIT LTD PTNT 69318Q104 171 8,116 SH   SOLE   8,116 0 0
Pembina Pipeline Corp. COM 706327103 20,718 563,990 SH   SOLE   563,990 0 0
PENTAIR, INC. SHS G7S00T104 181 4,076 SH   SOLE   4,076 0 0
Phillips 66 Partners, L.P. COM UNIT REP INT 718549207 1,192 22,772 SH   SOLE   22,772 0 0
Pivotal Software, Inc. COM CL A 72582H107 10 475 SH   SOLE   475 0 0
Plains All American Pipeline UNIT LTD PARTN 726503105 4,569 186,433 SH   SOLE   186,433 0 0
Plains GP Holdings, L.P. LTD PARTNR INT A 72651A207 4,403 176,673 SH   SOLE   176,673 0 0
Q2 Holdings, Inc. COM 74736L109 39 568 SH   SOLE   568 0 0
Qts Realty Trust, Inc. COM CL A 74736A103 17 383 SH   SOLE   383 0 0
Qualys, Inc. COM 74758T303 19 231 SH   SOLE   231 0 0
Radware Ltd. ORD M81873107 6 244 SH   SOLE   244 0 0
Red Hat, Inc. COM 756577102 117 642 SH   SOLE   642 0 0
Rexnord Corp. COM 76169B102 100 3,980 SH   SOLE   3,980 0 0
Semgroup Corp. CL A 81663A105 1,073 72,781 SH   SOLE   72,781 0 0
Shell Midstream Partners, L.P. UNIT LTD INT 822634101 1,077 52,662 SH   SOLE   52,662 0 0
Sjw Corp. COM 784305104 55 887 SH   SOLE   887 0 0
SolarWinds, Inc. COM 83417Q105 3 174 SH   SOLE   174 0 0
South Jersey Industries, Inc. COM 838518108 3,286 102,465 SH   SOLE   102,465 0 0
Southwest Gas Corporation COM 844895102 4,837 58,803 SH   SOLE   58,803 0 0
Spire, Inc. COM 84857L101 4,627 56,227 SH   SOLE   56,227 0 0
Splunk, Inc. COM 848637104 118 949 SH   SOLE   949 0 0
Sprague Resources, L.P. COM UNIT REP LTD 849343108 66 3,568 SH   SOLE   3,568 0 0
Square, Inc. CL A 852234103 179 2,387 SH   SOLE   2,387 0 0
Stoneco Ltd. COM CL A G85158106 22 544 SH   SOLE   544 0 0
Summit Midstream Partners, L.P. COM UNIT LTD 866142102 145 14,935 SH   SOLE   14,935 0 0
Sunoco, L.P. COM UT REP LP 86765K109 750 24,065 SH   SOLE   24,065 0 0
Tallgrass Energy, L.P. CLASS A SHS 874696107 4,018 159,811 SH   SOLE   159,811 0 0
Targa Resources Corp. COM 87612G101 10,566 254,306 SH   SOLE   254,306 0 0
TC PipeLines, L.P. UT COM LTD PRT 87233Q108 843 22,576 SH   SOLE   22,576 0 0
Teradata Corp. COM 88076W103 36 816 SH   SOLE   816 0 0
The York Water Co. COM 987184108 17 491 SH   SOLE   491 0 0
Tortoise Cloud Infrastructure TORTOISE CLOUD 56167N555 2,537 95,000 SH   SOLE   95,000 0 0
Tortoise Digital Payments Infrastructure TORTOISE DIGIT 56167N548 2,630 95,000 SH   SOLE   95,000 0 0
Tortoise North American Pipeline TORTOISE NRAM PI 56167N720 98 4,100 SH   SOLE   4,100 0 0
Total System Services, Inc. COM 891906109 182 1,919 SH   SOLE   1,919 0 0
Transcanada Corp, COM 89353D107 25,076 557,989 SH   SOLE   557,989 0 0
Travelport Worldwide Ltd, SHS G9019D104 29 1,859 SH   SOLE   1,859 0 0
USA Compression Partners, L.P. COMUNIT LTDPAR 90290N109 190 12,149 SH   SOLE   12,149 0 0
USD Partners, L.P. COM UT REP LTD 903318103 45 4,132 SH   SOLE   4,132 0 0
VISA, Inc. COM CL A 92826C839 126 809 SH   SOLE   809 0 0
Vmware, Inc. CL A COM 928563402 100 556 SH   SOLE   556 0 0
Watts Water Technologies, Inc. CL A 942749102 85 1,047 SH   SOLE   1,047 0 0
Western Midstream Partners, L.P. COM UNIT LP INT 958669103 2,736 87,229 SH   SOLE   87,229 0 0
Western Union Co/The COM 959802109 119 6,427 SH   SOLE   6,427 0 0
Wex, Inc. COM 96208T104 121 631 SH   SOLE   631 0 0
Williams Companies, Inc. COM 969457100 26,313 916,187 SH   SOLE   916,187 0 0
Worldpay, Inc. CL A 981558109 214 1,886 SH   SOLE   1,886 0 0
Xylem, Inc. COM 98419M100 336 4,256 SH   SOLE   4,256 0 0
Yext, Inc. COM 98585N106 9 413 SH   SOLE   413 0 0
Yirendai Ltd. SPONSORED ADR 98585L100 3 191 SH   SOLE   191 0 0
Zscaler, Inc. COM 98980G102 25 357 SH   SOLE   357 0 0
Zuora, Inc. COM CL A 98983V106 19 928 SH   SOLE   928 0 0