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
Estimated average burden
hours per response: 23.8
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
8POINT3 ENERGY PARTNERS LP CL A RPT LTDPT 282539105 1 49 SH   DFND N/A 49 0 0
ABB LTD SPONSORED ADR 000375204 1 49 SH   DFND N/A 49 0 0
ACUITY BRANDS INC COM 00508Y102 2 8 SH   DFND N/A 8 0 0
ALBEMARLE CORP COM 012653101 2 16 SH   DFND N/A 16 0 0
ALGONQUIN PWR UTILS CORP COM 015857105 1 114 SH   DFND N/A 114 0 0
AMERICAN WTR WKS CO INC NEW COM 030420103 8 103 SH   DFND N/A 103 0 0
ANADARKO PETE CORP COM 032511107 5,740 126,598 SH   DFND N/A 126,598 0 0
ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 90,757 4,129,075 SH   DFND N/A 3,647,803 0 481,272
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 294,987 8,890,510 SH   DFND N/A 7,849,928 0 1,040,582
ANTERO RES CORP COM 03674X106 8,816 407,937 SH   DFND N/A 407,937 0 0
APACHE CORP COM 037411105 2 42 SH   DFND N/A 42 0 0
ANADARKO PETE CORP UNIT 99/99/9999 032511404 28,479 693,100 SH   DFND N/A 693,100 0 0
AQUA AMERICA INC COM 03836W103 1 31 SH   DFND N/A 31 0 0
AQUAVENTURE HLDGS LTD SHS G0443N107 3 209 SH   DFND N/A 209 0 0
ARCHROCK INC COM 03957W106 1 57 SH   DFND N/A 57 0 0
ATLANTICA YIELD PLC SHS G0751N103 27 1,259 SH   DFND N/A 1,259 0 0
ATWOOD OCEANICS INC COM 050095108 0 22 SH   DFND N/A 22 0 0
BADGER METER INC COM 056525108 1 36 SH   DFND N/A 36 0 0
BAKER HUGHES INC COM 057224107 4 69 SH   DFND N/A 69 0 0
BROOKFIELD RENEWABLE PARTNER PARTNERSHIP UNIT G16258108 18 564 SH   DFND N/A 564 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 679,812 10,633,690 SH   DFND N/A 9,649,620 0 984,070
C&J ENERGY SVCS INC NEW COM 12674R100 0 6 SH   DFND N/A 6 0 0
CABOT OIL & GAS CORP COM 127097103 13,194 526,094 SH   DFND N/A 526,094 0 0
CARRIZO OIL & GAS INC COM 144577103 6,363 365,293 SH   DFND N/A 365,293 0 0
CELANESE CORP DEL COM SER A 150870103 2 16 SH   DFND N/A 16 0 0
CENTENNIAL RESOURCE DEV INC CL A 15136A102 16,157 1,047,375 SH   DFND N/A 1,047,375 0 0
CHART INDS INC COM PAR $0.01 16115Q308 0 7 SH   DFND N/A 7 0 0
CHENIERE ENERGY INC COM NEW 16411R208 255,900 5,253,548 SH   DFND N/A 5,100,460 0 153,088
CHENIERE ENERGY PARTNERS LP COM UNIT 16411Q101 1 36 SH   DFND N/A 36 0 0
CHEVRON CORP NEW COM 166764100 2 18 SH   DFND N/A 18 0 0
CIMAREX ENERGY CO COM 171798101 8,660 92,118 SH   DFND N/A 92,118 0 0
CLEARBRIDGE ENERGY MLP FD IN COM 184692101 116 7,582 SH   DFND N/A 7,582 0 0
CMS ENERGY CORP COM 125896100 2 49 SH   DFND N/A 49 0 0
CONCHO RES INC COM 20605P101 17,155 141,155 SH   DFND N/A 141,155 0 0
CONNECTICUT WTR SVC INC COM 207797101 1 16 SH   DFND N/A 16 0 0
CONOCOPHILLIPS COM 20825C104 1 28 SH   DFND N/A 28 0 0
CONTINENTAL RESOURCES INC COM 212015101 7,759 240,004 SH   DFND N/A 240,004 0 0
CORE LABORATORIES N V COM N22717107 1 10 SH   DFND N/A 10 0 0
COVANTA HLDG CORP COM 22282E102 15 1,100 SH   DFND N/A 1,100 0 0
DANAHER CORP DEL COM 235851102 5 54 SH   DFND N/A 54 0 0
DCP MIDSTREAM LP COM UT LTD PTN 23311P100 126,078 3,726,808 SH   DFND N/A 3,726,808 0 0
DEVON ENERGY CORP NEW COM 25179M103 8,268 258,630 SH   DFND N/A 258,630 0 0
DIAMONDBACK ENERGY INC COM 25278X109 12,304 138,542 SH   DFND N/A 138,542 0 0
DOMINION ENERGY MIDSTRM PRTN COM UT REP LTD 257454108 202,330 6,951,657 SH   DFND N/A 6,312,988 0 638,669
DOMINION ENERGY INC COM 25746U109 107 1,396 SH   DFND N/A 1,396 0 0
DRIL-QUIP INC COM 262037104 0 9 SH   DFND N/A 9 0 0
DTE ENERGY CO COM 233331107 142 1,340 SH   DFND N/A 1,340 0 0
DTE ENERGY CO UNIT 99/99/9999 233331883 2,172 39,600 SH   DFND N/A 39,600 0 0
DUKE ENERGY CORP NEW COM NEW 26441C204 3 32 SH   DFND N/A 32 0 0
EASTMAN CHEM CO COM 277432100 1 17 SH   DFND N/A 17 0 0
ECOLAB INC COM 278865100 4 32 SH   DFND N/A 32 0 0
EDISON INTL COM 281020107 3 36 SH   DFND N/A 36 0 0
ENBRIDGE ENERGY MANAGEMENT L SHS UNITS LLI 29250X103 23,758 1,541,735 SH   DFND N/A 1,541,735 0 0
ENBRIDGE ENERGY PARTNERS L P COM 29250R106 58,140 3,633,759 SH   DFND N/A 3,633,759 0 0
ENBRIDGE INC COM 29250N105 247,078 6,206,443 SH   DFND N/A 6,206,443 0 0
ENERGY RECOVERY INC COM 29270J100 1 72 SH   DFND N/A 72 0 0
ENERGY TRANSFER EQUITY L P COM UT LTD PTN 29273V100 599,695 33,390,568 SH   DFND N/A 28,423,845 0 4,966,723
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 883,654 43,337,625 SH   DFND N/A 39,699,296 0 3,638,329
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 138,099 8,142,603 SH   DFND N/A 8,142,603 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 60,928 3,461,842 SH   DFND N/A 3,461,842 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 1,128,368 41,667,941 SH   DFND N/A 37,075,819 0 4,592,122
EOG RES INC COM 26875P101 26,728 295,273 SH   DFND N/A 295,273 0 0
EQT CORP COM 26884L109 4,808 82,067 SH   DFND N/A 82,067 0 0
EQT GP HLDGS LP COM UNIT REP 26885J103 53,134 1,762,312 SH   DFND N/A 1,496,051 0 266,261
EQT MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 672,787 9,014,962 SH   DFND N/A 7,962,083 0 1,052,879
ESCO TECHNOLOGIES INC COM 296315104 2 35 SH   DFND N/A 35 0 0
EXTRACTION OIL AND GAS INC COM 30227M105 7,477 555,942 SH   DFND N/A 555,942 0 0
EXXON MOBIL CORP COM 30231G102 3 35 SH   DFND N/A 35 0 0
FAIRMOUNT SANTROL HLDGS INC COM 30555Q108 1,242 318,436 SH   DFND N/A 318,436 0 0
FIRST SOLAR INC COM 336433107 1 19 SH   DFND N/A 19 0 0
FORUM ENERGY TECHNOLOGIES IN COM 34984V100 1 41 SH   DFND N/A 41 0 0
FRANKS INTL N V COM N33462107 0 48 SH   DFND N/A 48 0 0
GARMIN LTD SHS H2906T109 15 300 SH   DFND N/A 300 0 0
GENESIS ENERGY L P UNIT LTD PARTN 371927104 327,222 10,312,699 SH   DFND N/A 9,310,010 0 1,002,689
GULFPORT ENERGY CORP COM NEW 402635304 446 30,253 SH   DFND N/A 30,253 0 0
HALCON RES CORP COM PAR NEW 40537Q605 4,404 970,000 SH   DFND N/A 970,000 0 0
HALLIBURTON CO COM 406216101 3,883 90,907 SH   DFND N/A 90,907 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 39 1,697 SH   DFND N/A 1,697 0 0
HD SUPPLY HLDGS INC COM 40416M105 1 45 SH   DFND N/A 45 0 0
HELMERICH & PAYNE INC COM 423452101 1 20 SH   DFND N/A 20 0 0
HESS CORP COM 42809H107 325 7,413 SH   DFND N/A 7,413 0 0
HOLLY ENERGY PARTNERS L P COM UT LTD PTN 435763107 160,907 4,954,048 SH   DFND N/A 4,954,048 0 0
IDEX CORP COM 45167R104 3 29 SH   DFND N/A 29 0 0
INFRAREIT INC COM 45685L100 2 80 SH   DFND N/A 80 0 0
ITRON INC COM 465741106 3 45 SH   DFND N/A 45 0 0
KINDER MORGAN INC DEL COM 49456B101 239,310 12,490,066 SH   DFND N/A 12,490,066 0 0
KINDER MORGAN INC DEL PFD SER A 49456B200 1,972 44,949 SH   DFND N/A 44,949 0 0
LAREDO PETROLEUM INC COM 516806106 5,197 493,974 SH   DFND N/A 493,974 0 0
LINDSAY CORP COM 535555106 1 6 SH   DFND N/A 6 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 963,682 13,521,564 SH   DFND N/A 11,972,846 0 1,548,718
MARATHON OIL CORP COM 565849106 1 115 SH   DFND N/A 115 0 0
MARATHON PETE CORP COM 56585A102 2,272 43,426 SH   DFND N/A 43,426 0 0
MIX TELEMATICS LTD SPONSORED ADR 60688N102 16 2,000 SH   DFND N/A 2,000 0 0
MPLX LP COM UNIT REP LTD 55336V100 638,129 19,105,648 SH   DFND N/A 16,823,819 0 2,281,829
MRC GLOBAL INC COM 55345K103 0 27 SH   DFND N/A 27 0 0
MUELLER WTR PRODS INC COM SER A 624758108 4 380 SH   DFND N/A 380 0 0
NABORS INDUSTRIES LTD SHS G6359F103 909 111,723 SH   DFND N/A 111,723 0 0
NATIONAL FUEL GAS CO N J COM 636180101 43,480 778,656 SH   DFND N/A 778,656 0 0
NATIONAL OILWELL VARCO INC COM 637071101 1 22 SH   DFND N/A 22 0 0
NEWFIELD EXPL CO COM 651290108 7,418 260,658 SH   DFND N/A 260,658 0 0
NEWPARK RES INC COM PAR $.01NEW 651718504 1 91 SH   DFND N/A 91 0 0
NEXTERA ENERGY INC COM 65339F101 219 1,564 SH   DFND N/A 1,564 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 1,698 45,906 SH   DFND N/A 45,906 0 0
NISOURCE INC COM 65473P105 32,922 1,298,195 SH   DFND N/A 1,298,195 0 0
NOBLE ENERGY INC COM 655044105 1,377 48,654 SH   DFND N/A 48,654 0 0
NOBLE MIDSTREAM PARTNERS LP COM UNIT REPST 65506L105 130,760 2,945,365 SH   DFND N/A 2,722,815 0 222,550
NRG ENERGY INC COM NEW 629377508 0 24 SH   DFND N/A 24 0 0
NRG YIELD INC CL A NEW 62942X306 15 900 SH   DFND N/A 900 0 0
NRG YIELD INC CL C 62942X405 935 53,151 SH   DFND N/A 53,151 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 201,041 4,311,408 SH   DFND N/A 4,008,768 0 302,640
OCCIDENTAL PETE CORP DEL COM 674599105 433 7,224 SH   DFND N/A 7,224 0 0
OLIN CORP COM PAR $1 680665205 580 19,163 SH   DFND N/A 19,163 0 0
ONEOK PARTNERS LP UNIT LTD PARTN 68268N103 693,345 13,576,363 SH   DFND N/A 12,019,449 0 1,556,914
ONEOK INC NEW COM 682680103 188,357 3,611,142 SH   DFND N/A 3,611,142 0 0
ORMAT TECHNOLOGIES INC COM 686688102 2 30 SH   DFND N/A 30 0 0
PARSLEY ENERGY INC CL A 701877102 8,107 292,131 SH   DFND N/A 292,131 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 37 1,559 SH   DFND N/A 1,559 0 0
PATTERSON UTI ENERGY INC COM 703481101 1,549 76,733 SH   DFND N/A 76,733 0 0
PDC ENERGY INC COM 69327R101 4,288 99,463 SH   DFND N/A 99,463 0 0
PEMBINA PIPELINE CORP COM 706327103 148,683 4,489,233 SH   DFND N/A 4,489,233 0 0
PENTAIR PLC SHS G7S00T104 7 104 SH   DFND N/A 104 0 0
PHILLIPS 66 COM 718546104 1,413 17,089 SH   DFND N/A 17,089 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 397,075 8,034,708 SH   DFND N/A 6,956,693 0 1,078,015
PINNACLE WEST CAP CORP COM 723484101 1 12 SH   DFND N/A 12 0 0
PIONEER NAT RES CO COM 723787107 33,416 209,398 SH   DFND N/A 209,398 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 875,871 33,341,100 SH   DFND N/A 29,650,416 0 3,690,684
PLAINS GP HLDGS L P LTD PARTNR INT A 72651A207 182,688 6,983,497 SH   DFND N/A 6,983,497 0 0
PPL CORP COM 69351T106 4 93 SH   DFND N/A 93 0 0
QEP RES INC COM 74733V100 1 68 SH   DFND N/A 68 0 0
RANGE RES CORP COM 75281A109 8,548 368,941 SH   DFND N/A 368,941 0 0
RICE ENERGY INC COM 762760106 10,112 379,721 SH   DFND N/A 379,721 0 0
RICE MIDSTREAM PARTNERS LP UNIT LTD PARTN 762819100 163,203 8,184,689 SH   DFND N/A 8,184,689 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 6,090 114,500 SH   DFND N/A 114,500 0 0
RPC INC COM 749660106 1 48 SH   DFND N/A 48 0 0
RSP PERMIAN INC COM 74978Q105 9,899 306,769 SH   DFND N/A 306,769 0 0
SCHLUMBERGER LTD COM 806857108 4 58 SH   DFND N/A 58 0 0
SCHNITZER STL INDS CL A 806882106 18 700 SH   DFND N/A 700 0 0
SEMGROUP CORP CL A 81663A105 68,346 2,531,336 SH   DFND N/A 2,531,336 0 0
SEMPRA ENERGY COM 816851109 216 1,913 SH   DFND N/A 1,913 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 295,114 9,739,748 SH   DFND N/A 8,582,079 0 1,157,669
SM ENERGY CO COM 78454L100 3,137 189,759 SH   DFND N/A 189,759 0 0
SMART SAND INC COM 83191H107 0 29 SH   DFND N/A 29 0 0
SPECTRA ENERGY PARTNERS LP COM 84756N109 276,915 6,454,903 SH   DFND N/A 5,779,526 0 675,377
SUNRUN INC COM 86771W105 1 168 SH   DFND N/A 168 0 0
SUPERIOR ENERGY SVCS INC COM 868157108 1 74 SH   DFND N/A 74 0 0
TALLGRASS ENERGY GP LP SHS CL A 874696107 79,412 3,122,785 SH   DFND N/A 2,852,579 0 270,206
TALLGRASS ENERGY PARTNERS LP COM UNIT 874697105 367,048 7,327,764 SH   DFND N/A 6,582,601 0 745,163
TARGA RES CORP COM 87612G101 303,795 6,721,135 SH   DFND N/A 6,157,620 0 563,515
TC PIPELINES LP UT COM LTD PRT 87233Q108 1 16 SH   DFND N/A 16 0 0
TECHNIPFMC PLC COM G87110105 1 31 SH   DFND N/A 31 0 0
TERRAFORM GLOBAL INC CL A 88104M101 25 5,000 SH   DFND N/A 5,000 0 0
TERRAFORM PWR INC CL A COM 88104R100 22 1,800 SH   DFND N/A 1,800 0 0
TESLA INC COM 88160R101 5 15 SH   DFND N/A 15 0 0
TESORO CORP COM 881609101 1,674 17,884 SH   DFND N/A 17,884 0 0
TESORO LOGISTICS LP COM UNIT LP 88160T107 624,761 12,086,683 SH   DFND N/A 10,853,053 0 1,233,630
TETRA TECH INC NEW COM 88162G103 2 51 SH   DFND N/A 51 0 0
TETRA TECHNOLOGIES INC DEL COM 88162F105 0 104 SH   DFND N/A 104 0 0
TRANSCANADA CORP COM 89353D107 253,757 5,323,200 SH   DFND N/A 5,323,200 0 0
U S SILICA HLDGS INC COM 90346E103 4,340 122,298 SH   DFND N/A 122,298 0 0
VALERO ENERGY CORP NEW COM 91913Y100 1,443 21,394 SH   DFND N/A 21,394 0 0
VALERO ENERGY PARTNERS LP COM UNT REP LP 91914J102 260,535 5,708,482 SH   DFND N/A 4,993,700 0 714,782
VTTI ENERGY PARTNERS LP COM UNIT RP LT Y9384M101 33,785 1,719,363 SH   DFND N/A 1,719,363 0 0
WATTS WATER TECHNOLOGIES INC CL A 942749102 2 37 SH   DFND N/A 37 0 0
WEATHERFORD INTL PLC ORD SHS G48833100 1 300 SH   DFND N/A 300 0 0
WEC ENERGY GROUP INC COM 92939U106 209 3,402 SH   DFND N/A 3,402 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 50,993 1,185,322 SH   DFND N/A 1,016,352 0 168,970
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 673,757 12,044,287 SH   DFND N/A 10,856,325 0 1,187,962
WESTLAKE CHEM CORP COM 960413102 1 21 SH   DFND N/A 21 0 0
WHITING PETE CORP NEW COM 966387102 0 27 SH   DFND N/A 27 0 0
WILLIAMS COS INC DEL COM 969457100 460,642 15,212,764 SH   DFND N/A 14,109,328 0 1,103,436
WILLIAMS PARTNERS L P NEW COM UNIT LTD PAR 96949L105 457,776 11,413,024 SH   DFND N/A 10,146,910 0 1,266,114
WPX ENERGY INC COM 98212B103 7,114 736,395 SH   DFND N/A 736,395 0 0
XYLEM INC COM 98419M100 9 166 SH   DFND N/A 166 0 0