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
ATLANTICA YIELD PLC SHS G0751N103 26 1,316 SH   DFND N/A 1,316 0 0
ACUITY BRANDS INC COM 00508Y102 1 8 SH   DFND N/A 8 0 0
ALBEMARLE CORP COM 012653101 669 4,906 SH   DFND N/A 4,906 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 6,184 126,598 SH   DFND N/A 126,598 0 0
ANDEAVOR COM 03349M105 1,862 18,048 SH   DFND N/A 18,048 0 0
ANDEAVOR LOGISTICS LP COM UNIT LP INT 03350F106 612,571 12,236,733 SH   DFND N/A 10,930,774 0 1,305,959
ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 88,077 4,302,725 SH   DFND N/A 3,796,590 0 506,135
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 326,260 10,347,615 SH   DFND N/A 8,990,004 0 1,357,611
ANTERO RES CORP COM 03674X106 8,695 436,950 SH   DFND N/A 436,950 0 0
APACHE CORP COM 037411105 2 42 SH   DFND N/A 42 0 0
ANADARKO PETE CORP UNIT 99/99/9999 032511404 27,551 693,100 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 3 228 SH   DFND N/A 228 0 0
ARCHROCK PARTNERS L P COM UNITS REPSTG 03957U100 38 2,671 SH   DFND N/A 2,671 0 0
ARCHROCK INC COM 03957W106 1 57 SH   DFND N/A 57 0 0
ATWOOD OCEANICS INC COM 050095108 0 22 SH   DFND N/A 22 0 0
BADGER METER INC COM 056525108 3 53 SH   DFND N/A 53 0 0
BAKER HUGHES INC COM 057224107 3 69 SH   DFND N/A 69 0 0
BROOKFIELD RENEWABLE PARTNER PARTNERSHIP UNIT G16258108 19 564 SH   DFND N/A 564 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 617,741 10,837,570 SH   DFND N/A 9,804,314 0 1,033,256
C&J ENERGY SVCS INC NEW COM 12674R100 0 6 SH   DFND N/A 6 0 0
CABOT OIL & GAS CORP COM 127097103 18,542 693,177 SH   DFND N/A 693,177 0 0
CARRIZO OIL & GAS INC COM 144577103 5,079 296,480 SH   DFND N/A 296,480 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 18,620 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 272,869 6,058,373 SH   DFND N/A 5,898,750 0 159,623
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 10,266 90,318 SH   DFND N/A 90,318 0 0
CMS ENERGY CORP COM 125896100 2 49 SH   DFND N/A 49 0 0
CONCHO RES INC COM 20605P101 17,835 135,402 SH   DFND N/A 135,402 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 11,228 290,797 SH   DFND N/A 290,797 0 0
CORE LABORATORIES N V COM N22717107 1 10 SH   DFND N/A 10 0 0
COVANTA HLDG CORP COM 22282E102 16 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 129,097 3,726,808 SH   DFND N/A 3,726,808 0 0
DEVON ENERGY CORP NEW COM 25179M103 8,830 240,530 SH   DFND N/A 240,530 0 0
DIAMONDBACK ENERGY INC COM 25278X109 13,469 137,499 SH   DFND N/A 137,499 0 0
DOMINION ENERGY INC COM 25746U109 196 2,554 SH   DFND N/A 2,554 0 0
DOMINION ENERGY MIDSTRM PRTN COM UT REP LTD 257454108 205,160 6,454,074 SH   DFND N/A 5,790,194 0 663,880
DRIL-QUIP INC COM 262037104 0 9 SH   DFND N/A 9 0 0
DTE ENERGY CO COM 233331107 148 1,375 SH   DFND N/A 1,375 0 0
DTE ENERGY CO UNIT 99/99/9999 233331883 2,156 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 2 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 30,152 1,950,324 SH   DFND N/A 1,950,324 0 0
ENBRIDGE ENERGY PARTNERS L P COM 29250R106 121,752 7,619,043 SH   DFND N/A 7,619,043 0 0
ENBRIDGE INC COM 29250N105 268,507 6,417,469 SH   DFND N/A 6,417,469 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 536,039 30,842,274 SH   DFND N/A 25,990,329 0 4,851,945
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 735,997 40,240,392 SH   DFND N/A 37,104,587 0 3,135,805
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 138,786 8,280,784 SH   DFND N/A 8,280,784 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 64,464 3,737,067 SH   DFND N/A 3,737,067 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 1,140,835 43,760,469 SH   DFND N/A 38,628,068 0 5,132,401
EOG RES INC COM 26875P101 27,914 288,549 SH   DFND N/A 288,549 0 0
EQT CORP COM 26884L109 10,249 157,099 SH   DFND N/A 157,099 0 0
EQT GP HLDGS LP COM UNIT REP 26885J103 50,048 1,728,184 SH   DFND N/A 1,456,095 0 272,089
EQT MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 653,527 8,717,176 SH   DFND N/A 7,645,344 0 1,071,832
ESCO TECHNOLOGIES INC COM 296315104 2 35 SH   DFND N/A 35 0 0
EXTRACTION OIL AND GAS INC COM 30227M105 5,348 347,496 SH   DFND N/A 347,496 0 0
EXXON MOBIL CORP COM 30231G102 3 35 SH   DFND N/A 35 0 0
FAIRMOUNT SANTROL HLDGS INC COM 30555Q108 1,324 277,078 SH   DFND N/A 277,078 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 16 300 SH   DFND N/A 300 0 0
GENESIS ENERGY L P UNIT LTD PARTN 371927104 245,866 9,330,795 SH   DFND N/A 8,417,451 0 913,344
GULFPORT ENERGY CORP COM NEW 402635304 392 27,353 SH   DFND N/A 27,353 0 0
HALCON RES CORP COM PAR NEW 40537Q605 6,596 970,000 SH   DFND N/A 970,000 0 0
HALLIBURTON CO COM 406216101 4,362 94,773 SH   DFND N/A 94,773 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 41 1,697 SH   DFND N/A 1,697 0 0
HELMERICH & PAYNE INC COM 423452101 1 20 SH   DFND N/A 20 0 0
HESS CORP COM 42809H107 343 7,313 SH   DFND N/A 7,313 0 0
HOLLY ENERGY PARTNERS L P COM UT LTD PTN 435763107 121,436 3,635,805 SH   DFND N/A 3,635,805 0 0
IDEX CORP COM 45167R104 4 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
KEANE GROUP INC COM 48669A108 1,356 81,307 SH   DFND N/A 81,307 0 0
KINDER MORGAN INC DEL COM 49456B101 266,767 13,908,625 SH   DFND N/A 13,908,625 0 0
LAREDO PETROLEUM INC COM 516806106 4,616 356,976 SH   DFND N/A 356,976 0 0
LINDSAY CORP COM 535555106 1 6 SH   DFND N/A 6 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 1,011,815 14,238,881 SH   DFND N/A 12,494,836 0 1,744,045
MARATHON OIL CORP COM 565849106 2 115 SH   DFND N/A 115 0 0
MARATHON PETE CORP COM 56585A102 2,521 44,950 SH   DFND N/A 44,950 0 0
MIX TELEMATICS LTD SPONSORED ADR 60688N102 20 2,000 SH   DFND N/A 2,000 0 0
MPLX LP COM UNIT REP LTD 55336V100 797,774 22,787,043 SH   DFND N/A 20,071,528 0 2,715,515
MRC GLOBAL INC COM 55345K103 0 27 SH   DFND N/A 27 0 0
MUELLER WTR PRODS INC COM SER A 624758108 5 409 SH   DFND N/A 409 0 0
NABORS INDUSTRIES LTD SHS G6359F103 1 102 SH   DFND N/A 102 0 0
NATIONAL FUEL GAS CO N J COM 636180101 46,918 828,793 SH   DFND N/A 828,793 0 0
NATIONAL OILWELL VARCO INC COM 637071101 1 22 SH   DFND N/A 22 0 0
NEWFIELD EXPL CO COM 651290108 7,657 258,058 SH   DFND N/A 258,058 0 0
NEWPARK RES INC COM PAR $.01NEW 651718504 1 91 SH   DFND N/A 91 0 0
NEXTERA ENERGY INC COM 65339F101 344 2,346 SH   DFND N/A 2,346 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 1,741 43,205 SH   DFND N/A 43,205 0 0
NISOURCE INC COM 65473P105 33,227 1,298,427 SH   DFND N/A 1,298,427 0 0
NOBLE ENERGY INC COM 655044105 1,116 39,358 SH   DFND N/A 39,358 0 0
NOBLE MIDSTREAM PARTNERS LP COM UNIT REPST 65506L105 149,680 2,885,684 SH   DFND N/A 2,656,889 0 228,795
NRG ENERGY INC COM NEW 629377508 1 24 SH   DFND N/A 24 0 0
NRG YIELD INC CL C 62942X405 3 145 SH   DFND N/A 145 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 178,413 4,395,490 SH   DFND N/A 4,067,851 0 327,639
OCCIDENTAL PETE CORP DEL COM 674599105 464 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 INC NEW COM 682680103 739,659 13,348,843 SH   DFND N/A 11,924,167 0 1,424,676
ORMAT TECHNOLOGIES INC COM 686688102 2 30 SH   DFND N/A 30 0 0
PARSLEY ENERGY INC CL A 701877102 8,517 323,336 SH   DFND N/A 323,336 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 38 1,559 SH   DFND N/A 1,559 0 0
PATTERSON UTI ENERGY INC COM 703481101 1,777 84,875 SH   DFND N/A 84,875 0 0
PDC ENERGY INC COM 69327R101 3,761 76,709 SH   DFND N/A 76,709 0 0
PEMBINA PIPELINE CORP COM 706327103 166,531 4,746,206 SH   DFND N/A 4,746,206 0 0
PENTAIR PLC SHS G7S00T104 8 111 SH   DFND N/A 111 0 0
PHILLIPS 66 COM 718546104 1,485 16,215 SH   DFND N/A 16,215 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 421,047 8,010,782 SH   DFND N/A 6,892,919 0 1,117,863
PINNACLE WEST CAP CORP COM 723484101 1 12 SH   DFND N/A 12 0 0
PIONEER NAT RES CO COM 723787107 26,923 182,480 SH   DFND N/A 182,480 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 650,460 30,696,551 SH   DFND N/A 26,772,388 0 3,924,163
PLAINS GP HLDGS L P LTD PARTNR INT A 72651A207 167,017 7,636,798 SH   DFND N/A 7,636,798 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 11,194 571,977 SH   DFND N/A 571,977 0 0
RICE ENERGY INC COM 762760106 1,334 46,094 SH   DFND N/A 46,094 0 0
RICE MIDSTREAM PARTNERS LP UNIT LTD PARTN 762819100 162,329 7,752,095 SH   DFND N/A 7,752,095 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 6,936 114,500 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 10,572 305,640 SH   DFND N/A 305,640 0 0
SCHLUMBERGER LTD COM 806857108 4 58 SH   DFND N/A 58 0 0
SCHNITZER STL INDS CL A 806882106 20 700 SH   DFND N/A 700 0 0
SEMGROUP CORP CL A 81663A105 84,046 2,923,354 SH   DFND N/A 2,923,354 0 0
SEMPRA ENERGY COM 816851109 287 2,514 SH   DFND N/A 2,514 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 568,922 20,435,426 SH   DFND N/A 18,210,275 0 2,225,151
SM ENERGY CO COM 78454L100 3,015 169,959 SH   DFND N/A 169,959 0 0
SMART SAND INC COM 83191H107 0 29 SH   DFND N/A 29 0 0
SPECTRA ENERGY PARTNERS LP COM 84756N109 273,132 6,154,391 SH   DFND N/A 5,488,225 0 666,166
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 93,320 3,303,355 SH   DFND N/A 3,022,470 0 280,885
TALLGRASS ENERGY PARTNERS LP COM UNIT 874697105 360,268 7,522,832 SH   DFND N/A 6,743,860 0 778,972
TARGA RES CORP COM 87612G101 329,157 6,958,912 SH   DFND N/A 6,349,004 0 609,908
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 24 5,000 SH   DFND N/A 5,000 0 0
TERRAFORM PWR INC CL A COM 88104R100 37 2,800 SH   DFND N/A 2,800 0 0
TESLA INC COM 88160R101 5 15 SH   DFND N/A 15 0 0
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 260,919 5,278,549 SH   DFND N/A 5,278,549 0 0
U S SILICA HLDGS INC COM 90346E103 5,615 180,710 SH   DFND N/A 180,710 0 0
VALERO ENERGY CORP NEW COM 91913Y100 2 26 SH   DFND N/A 26 0 0
VALERO ENERGY PARTNERS LP COM UNT REP LP 91914J102 250,610 5,732,152 SH   DFND N/A 4,992,646 0 739,506
WATTS WATER TECHNOLOGIES INC CL A 942749102 3 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 211 3,368 SH   DFND N/A 3,368 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 48,733 1,183,412 SH   DFND N/A 1,006,062 0 177,350
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 658,838 12,847,861 SH   DFND N/A 11,486,324 0 1,361,537
WESTLAKE CHEM CORP COM 960413102 113 1,360 SH   DFND N/A 1,360 0 0
WESTLAKE CHEM PARTNERS LP COM UNIT RP LP 960417103 3,724 164,064 SH   DFND N/A 164,064 0 0
WHITING PETE CORP NEW COM 966387102 0 27 SH   DFND N/A 27 0 0
WILLIAMS COS INC DEL COM 969457100 458,879 15,290,873 SH   DFND N/A 14,156,730 0 1,134,143
WILLIAMS PARTNERS L P NEW COM UNIT LTD PAR 96949L105 427,855 10,998,845 SH   DFND N/A 9,676,607 0 1,322,238
WPX ENERGY INC COM 98212B103 8,349 725,963 SH   DFND N/A 725,963 0 0
XYLEM INC COM 98419M100 10 166 SH   DFND N/A 166 0 0