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 13 549 SH   DFND N/A 549 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 19,576 315,749 SH   DFND N/A 315,749 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 287,779 8,678,507 SH   DFND N/A 7,675,413 0 1,003,094
ANTERO RES CORP COM 03674X106 5,460 239,348 SH   DFND N/A 239,348 0 0
APACHE CORP COM 037411105 2 42 SH   DFND N/A 42 0 0
ANADARKO PETE CORP UNIT 99/99/9999 032511404 30,143 693,100 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 3 192 SH   DFND N/A 192 0 0
ARCHROCK INC COM 03957W106 1 57 SH   DFND N/A 57 0 0
ATWOOD OCEANICS INC COM 050095108 0 23 SH   DFND N/A 23 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 17 564 SH   DFND N/A 564 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 695,983 10,151,442 SH   DFND N/A 9,160,383 0 991,059
CABOT OIL & GAS CORP COM 127097103 12,761 533,710 SH   DFND N/A 533,710 0 0
CARRIZO OIL & GAS INC COM 144577103 7,080 247,025 SH   DFND N/A 247,025 0 0
CELANESE CORP DEL COM SER A 150870103 1 16 SH   DFND N/A 16 0 0
CENTENNIAL RESOURCE DEV INC CL A 15136A102 12,373 695,708 SH   DFND N/A 695,708 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 254,706 5,388,325 SH   DFND N/A 5,228,950 0 159,375
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 11,211 93,827 SH   DFND N/A 93,827 0 0
CMS ENERGY CORP COM 125896100 2 49 SH   DFND N/A 49 0 0
CONCHO RES INC COM 20605P101 18,157 141,472 SH   DFND N/A 141,472 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 9,000 198,147 SH   DFND N/A 198,147 0 0
CORE LABORATORIES N V COM N22717107 1 10 SH   DFND N/A 10 0 0
COVANTA HLDG CORP COM 22282E102 13 800 SH   DFND N/A 800 0 0
DANAHER CORP DEL COM 235851102 5 54 SH   DFND N/A 54 0 0
DCP MIDSTREAM PARTNERS LP COM UT LTD PTN 23311P100 140,068 3,570,420 SH   DFND N/A 3,570,420 0 0
DEVON ENERGY CORP NEW COM 25179M103 11,062 265,147 SH   DFND N/A 265,147 0 0
DIAMONDBACK ENERGY INC COM 25278X109 14,220 137,109 SH   DFND N/A 137,109 0 0
DOMINION MIDSTREAM PARTNERS COM UT REP LTD 257454108 202,347 6,333,234 SH   DFND N/A 5,700,501 0 632,733
DOMINION RES INC VA NEW COM 25746U109 25 320 SH   DFND N/A 320 0 0
DRIL-QUIP INC COM 262037104 0 9 SH   DFND N/A 9 0 0
DTE ENERGY CO COM 233331107 31 308 SH   DFND N/A 308 0 0
DTE ENERGY CO UNIT 99/99/9999 233331883 2,128 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 30,746 1,669,152 SH   DFND N/A 1,669,152 0 0
ENBRIDGE ENERGY PARTNERS L P COM 29250R106 97,095 5,110,289 SH   DFND N/A 5,110,289 0 0
ENBRIDGE INC COM 29250N105 251,437 6,009,487 SH   DFND N/A 6,009,487 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 708,640 35,916,886 SH   DFND N/A 30,742,099 0 5,174,787
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 622,465 17,044,485 SH   DFND N/A 15,749,287 0 1,295,198
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 149,106 8,147,891 SH   DFND N/A 8,147,891 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 64,951 3,348,000 SH   DFND N/A 3,348,000 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 1,107,006 40,094,388 SH   DFND N/A 35,702,923 0 4,391,465
EOG RES INC COM 26875P101 28,193 289,006 SH   DFND N/A 289,006 0 0
EQT CORP COM 26884L109 14,895 243,773 SH   DFND N/A 243,773 0 0
EQT GP HLDGS LP COM UNIT REP 26885J103 47,992 1,752,814 SH   DFND N/A 1,492,459 0 260,355
EQT MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 703,383 9,146,718 SH   DFND N/A 8,044,810 0 1,101,908
ESCO TECHNOLOGIES INC COM 296315104 2 35 SH   DFND N/A 35 0 0
EXTRACTION OIL AND GAS INC COM 30227M105 12,569 677,585 SH   DFND N/A 677,585 0 0
EXXON MOBIL CORP COM 30231G102 3 35 SH   DFND N/A 35 0 0
FAIRMOUNT SANTROL HLDGS INC COM 30555Q108 1,205 164,413 SH   DFND N/A 164,413 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 1 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 320,363 9,881,640 SH   DFND N/A 8,887,840 0 993,800
GULFPORT ENERGY CORP COM NEW 402635304 595 34,635 SH   DFND N/A 34,635 0 0
HALLIBURTON CO COM 406216101 3,671 74,600 SH   DFND N/A 74,600 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 35 1,716 SH   DFND N/A 1,716 0 0
HD SUPPLY HLDGS INC COM 40416M105 2 45 SH   DFND N/A 45 0 0
HELMERICH & PAYNE INC COM 423452101 842 12,654 SH   DFND N/A 12,654 0 0
HESS CORP COM 42809H107 3,927 67,413 SH   DFND N/A 67,413 0 0
HOLLY ENERGY PARTNERS L P COM UT LTD PTN 435763107 155,270 4,348,072 SH   DFND N/A 4,348,072 0 0
IDEX CORP COM 45167R104 3 29 SH   DFND N/A 29 0 0
INFRAREIT INC COM 45685L100 1 80 SH   DFND N/A 80 0 0
ITRON INC COM 465741106 3 45 SH   DFND N/A 45 0 0
JPMORGAN CHASE & CO ALERIAN ML ETN 46625H365 172 5,322 SH   DFND N/A 0 0 5,322
KINDER MORGAN INC DEL COM 49456B101 251,625 11,574,285 SH   DFND N/A 11,574,285 0 0
KINDER MORGAN INC DEL PFD SER A 49456B200 2,242 44,949 SH   DFND N/A 44,949 0 0
LAREDO PETROLEUM INC COM 516806106 899 61,562 SH   DFND N/A 61,562 0 0
LINDSAY CORP COM 535555106 1 6 SH   DFND N/A 6 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 1,035,147 13,459,193 SH   DFND N/A 11,912,840 0 1,546,353
MARATHON OIL CORP COM 565849106 168 10,659 SH   DFND N/A 10,659 0 0
MARATHON PETE CORP COM 56585A102 2,480 49,061 SH   DFND N/A 49,061 0 0
MIX TELEMATICS LTD SPONSORED ADR 60688N102 13 2,000 SH   DFND N/A 2,000 0 0
MPLX LP COM UNIT REP LTD 55336V100 682,040 18,903,554 SH   DFND N/A 16,613,518 0 2,290,036
MRC GLOBAL INC COM 55345K103 0 27 SH   DFND N/A 27 0 0
MUELLER WTR PRODS INC COM SER A 624758108 4 355 SH   DFND N/A 355 0 0
NABORS INDUSTRIES LTD SHS G6359F103 802 61,370 SH   DFND N/A 61,370 0 0
NATIONAL FUEL GAS CO N J COM 636180101 43,721 733,323 SH   DFND N/A 733,323 0 0
NATIONAL OILWELL VARCO INC COM 637071101 1 22 SH   DFND N/A 22 0 0
NEWFIELD EXPL CO COM 651290108 8,349 226,209 SH   DFND N/A 226,209 0 0
NEWPARK RES INC COM PAR $.01NEW 651718504 1 91 SH   DFND N/A 91 0 0
NEXTERA ENERGY INC COM 65339F101 47 368 SH   DFND N/A 368 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 1,440 43,473 SH   DFND N/A 43,473 0 0
NISOURCE INC COM 65473P105 30,799 1,294,618 SH   DFND N/A 1,294,618 0 0
NOBLE ENERGY INC COM 655044105 2,546 74,133 SH   DFND N/A 74,133 0 0
NOBLE MIDSTREAM PARTNERS LP COM UNIT REPST 65506L105 114,108 2,191,020 SH   DFND N/A 1,967,810 0 223,210
NRG ENERGY INC COM NEW 629377508 0 24 SH   DFND N/A 24 0 0
NRG YIELD INC CL A NEW 62942X306 16 900 SH   DFND N/A 900 0 0
NRG YIELD INC CL C 62942X405 657 37,106 SH   DFND N/A 37,106 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 105 2,015 SH   DFND N/A 2,015 0 0
OCCIDENTAL PETE CORP DEL COM 674599105 458 7,224 SH   DFND N/A 7,224 0 0
OLIN CORP COM PAR $1 680665205 1 42 SH   DFND N/A 42 0 0
ONEOK PARTNERS LP UNIT LTD PARTN 68268N103 805,304 14,915,795 SH   DFND N/A 13,333,186 0 1,582,609
ONEOK INC NEW COM 682680103 192,019 3,463,544 SH   DFND N/A 3,463,544 0 0
ORMAT TECHNOLOGIES INC COM 686688102 2 30 SH   DFND N/A 30 0 0
PARSLEY ENERGY INC CL A 701877102 9,555 293,905 SH   DFND N/A 293,905 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 31 1,559 SH   DFND N/A 1,559 0 0
PATTERSON UTI ENERGY INC COM 703481101 850 35,013 SH   DFND N/A 35,013 0 0
PDC ENERGY INC COM 69327R101 5,308 85,132 SH   DFND N/A 85,132 0 0
PEMBINA PIPELINE CORP COM 706327103 144,253 4,552,318 SH   DFND N/A 4,552,318 0 0
PENTAIR PLC SHS G7S00T104 7 104 SH   DFND N/A 104 0 0
PHILLIPS 66 COM 718546104 1,644 20,747 SH   DFND N/A 20,747 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 409,560 7,975,854 SH   DFND N/A 6,893,882 0 1,081,972
PINNACLE WEST CAP CORP COM 723484101 1 12 SH   DFND N/A 12 0 0
PIONEER NAT RES CO COM 723787107 37,970 203,888 SH   DFND N/A 203,888 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 1,045,837 33,085,641 SH   DFND N/A 29,481,730 0 3,603,911
PLAINS GP HLDGS L P LTD PARTNR INT A 72651A207 193,192 6,180,159 SH   DFND N/A 6,180,159 0 0
PORTLAND GEN ELEC CO COM NEW 736508847 1 13 SH   DFND N/A 13 0 0
PPL CORP COM 69351T106 3 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 8,102 278,431 SH   DFND N/A 278,431 0 0
RICE ENERGY INC COM 762760106 8,061 340,114 SH   DFND N/A 340,114 0 0
RICE MIDSTREAM PARTNERS LP UNIT LTD PARTN 762819100 186,523 7,395,847 SH   DFND N/A 7,395,847 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 6,038 114,500 SH   DFND N/A 114,500 0 0
RPC INC COM 749600106 1 48 SH   DFND N/A 48 0 0
RSP PERMIAN INC COM 74978Q105 12,564 303,259 SH   DFND N/A 303,259 0 0
SCHLUMBERGER LTD COM 806857108 5 58 SH   DFND N/A 58 0 0
SEMGROUP CORP CL A 81663A105 73,873 2,052,021 SH   DFND N/A 2,052,021 0 0
SEMPRA ENERGY COM 816851109 49 440 SH   DFND N/A 440 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 314,033 9,743,501 SH   DFND N/A 8,568,550 0 1,174,951
SM ENERGY CO COM 78454L100 6,893 286,984 SH   DFND N/A 286,984 0 0
SMART SAND INC COM 83191H107 0 29 SH   DFND N/A 29 0 0
SPECTRA ENERGY PARTNERS LP COM 84756N109 326,189 7,471,118 SH   DFND N/A 6,779,168 0 691,950
SUNOCO LOGISTICS PRTNRS L P COM UNITS 86764L108 660,973 27,066,873 SH   DFND N/A 24,005,094 0 3,061,779
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 87,409 3,039,263 SH   DFND N/A 2,779,242 0 260,021
TALLGRASS ENERGY PARTNERS LP COM UNIT 874697105 336,857 6,331,900 SH   DFND N/A 5,744,122 0 587,778
TARGA RES CORP COM 87612G101 308,735 5,154,174 SH   DFND N/A 4,753,221 0 400,953
TECHNIPFMC PLC COM G87110105 1 31 SH   DFND N/A 31 0 0
TERRAFORM GLOBAL INC CL A 88104M101 24 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 18 SH   DFND N/A 18 0 0
TESORO CORP COM 881609101 1,533 18,918 SH   DFND N/A 18,918 0 0
TESORO LOGISTICS LP COM UNIT LP 88160T107 640,735 11,763,088 SH   DFND N/A 10,515,408 0 1,247,680
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 249,642 5,409,370 SH   DFND N/A 5,409,370 0 0
U S SILICA HLDGS INC COM 90346E103 1,811 37,744 SH   DFND N/A 37,744 0 0
VALERO ENERGY CORP NEW COM 91913Y100 1,839 27,748 SH   DFND N/A 27,748 0 0
VALERO ENERGY PARTNERS LP COM UNT REP LP 91914J102 272,055 5,678,458 SH   DFND N/A 4,969,121 0 709,337
VTTI ENERGY PARTNERS LP COM UNIT RP LT Y9384M101 32,598 1,715,679 SH   DFND N/A 1,715,679 0 0
WATTS WATER TECHNOLOGIES INC CL A 942749102 2 37 SH   DFND N/A 37 0 0
WEATHERFORD INTL PLC ORD SHS G48833100 2 300 SH   DFND N/A 300 0 0
WEC ENERGY GROUP INC COM 92939U106 43 714 SH   DFND N/A 714 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 55,098 1,195,188 SH   DFND N/A 1,022,530 0 172,658
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 717,380 11,867,322 SH   DFND N/A 10,716,353 0 1,150,969
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 454,760 15,368,706 SH   DFND N/A 14,218,624 0 1,150,082
WILLIAMS PARTNERS L P NEW COM UNIT LTD PAR 96949L105 455,218 11,149,102 SH   DFND N/A 9,932,950 0 1,216,152
WPX ENERGY INC COM 98212B103 7,330 547,441 SH   DFND N/A 547,441 0 0
XYLEM INC COM 98419M100 8 166 SH   DFND N/A 166 0 0