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 19 1,232 SH   DFND N/A 1,232 0 0
ABB LTD SPONSORED ADR 000375204 11 549 SH   DFND N/A 549 0 0
ACUITY BRANDS INC COM 00508Y102 1 6 SH   DFND N/A 6 0 0
AMERICAN WTR WKS CO INC NEW COM 030420103 9 103 SH   DFND N/A 103 0 0
ANADARKO PETE CORP COM 032511107 18,200 341,785 SH   DFND N/A 341,785 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 256,956 9,219,792 SH   DFND N/A 8,357,305 0 862,487
ANTERO RES CORP COM 03674X106 4,613 177,555 SH   DFND N/A 177,555 0 0
APACHE CORP COM 037411105 2 42 SH   DFND N/A 42 0 0
AQUA AMERICA INC COM 03836W103 1 23 SH   DFND N/A 23 0 0
ARCHROCK INC COM 03957W106 1 57 SH   DFND N/A 57 0 0
ASPEN AEROGELS INC COM 04523Y105 0 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 18 SH   DFND N/A 18 0 0
BAKER HUGHES INC COM 057224107 3 75 SH   DFND N/A 75 0 0
BP PLC SPONSORED ADR 055622104 5,877 165,500 SH   DFND N/A 165,500 0 0
BROOKFIELD RENEWABLE PARTNER PARTNERSHIP UNIT G16258108 8 264 SH   DFND N/A 264 0 0
BROOKS AUTOMATION INC COM 114340102 10 900 SH   DFND N/A 900 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 760,636 10,815,245 SH   DFND N/A 9,773,131 0 1,042,114
C&J ENERGY SVCS LTD SHS G3164Q101 0 89 SH   DFND N/A 89 0 0
CABOT OIL & GAS CORP COM 127097103 9,044 351,368 SH   DFND N/A 351,368 0 0
CALIFORNIA WTR SVC GROUP COM 130788102 3 99 SH   DFND N/A 99 0 0
CALPINE CORP COM NEW 131347304 1 79 SH   DFND N/A 79 0 0
CARRIZO OIL & GAS INC COM 144577103 9,057 252,641 SH   DFND N/A 252,641 0 0
CENOVUS ENERGY INC COM 15135U109 2,117 153,200 SH   DFND N/A 153,200 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 108,265 2,883,235 SH   DFND N/A 2,883,235 0 0
CHEVRON CORP NEW COM 166764100 2 18 SH   DFND N/A 18 0 0
CIMAREX ENERGY CO COM 171798101 11,546 96,762 SH   DFND N/A 96,762 0 0
CMS ENERGY CORP COM 125896100 2 38 SH   DFND N/A 38 0 0
COLUMBIA PIPELINE GROUP INC COM 198280109 506 19,834 SH   DFND N/A 19,834 0 0
COLUMBIA PIPELINE PARTNERS L COM UT REPSTG 198281107 85,138 5,675,870 SH   DFND N/A 5,269,142 0 406,728
CONCHO RES INC COM 20605P101 15,666 131,348 SH   DFND N/A 131,348 0 0
CONNECTICUT WTR SVC INC COM 207797101 1 22 SH   DFND N/A 22 0 0
CONOCOPHILLIPS COM 20825C104 1 28 SH   DFND N/A 28 0 0
CONTINENTAL RESOURCES INC COM 212015101 6,238 137,798 SH   DFND N/A 137,798 0 0
CORE LABORATORIES N V COM N22717107 1 10 SH   DFND N/A 10 0 0
COVANTA HLDG CORP COM 22282E102 7 400 SH   DFND N/A 400 0 0
DANAHER CORP DEL COM 235851102 6 62 SH   DFND N/A 62 0 0
DCP MIDSTREAM PARTNERS LP COM UT LTD PTN 23311P100 116,041 3,364,473 SH   DFND N/A 3,364,473 0 0
DEVON ENERGY CORP NEW COM 25179M103 10,221 281,962 SH   DFND N/A 281,962 0 0
DIAMONDBACK ENERGY INC COM 25278X109 8,329 91,312 SH   DFND N/A 91,312 0 0
DOMINION MIDSTREAM PARTNERS COM UT REP LTD 257454108 80,483 2,861,093 SH   DFND N/A 2,622,607 0 238,486
DOMINION RES INC VA NEW COM 25746U109 7 93 SH   DFND N/A 93 0 0
DRIL-QUIP INC COM 262037104 1 9 SH   DFND N/A 9 0 0
DTE ENERGY CO COM 233331107 3 29 SH   DFND N/A 29 0 0
EASTMAN CHEM CO COM 277432100 1 17 SH   DFND N/A 17 0 0
ECOLAB INC COM 278865100 2 19 SH   DFND N/A 19 0 0
EDISON INTL COM 281020107 2 24 SH   DFND N/A 24 0 0
ENBRIDGE ENERGY MANAGEMENT L SHS UNITS LLI 29250X103 38,251 1,662,370 SH   DFND N/A 1,662,370 0 0
ENBRIDGE ENERGY PARTNERS L P COM 29250R106 147,316 6,349,810 SH   DFND N/A 5,910,226 0 439,584
ENBRIDGE INC COM 29250N105 163,002 3,848,017 SH   DFND N/A 3,848,017 0 0
ENERGY TRANSFER EQUITY L P COM UT LTD PTN 29273V100 314,717 21,901,001 SH   DFND N/A 18,895,706 0 3,005,295
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 691,167 18,155,153 SH   DFND N/A 16,721,804 0 1,433,349
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 109,909 6,609,090 SH   DFND N/A 6,609,090 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 43,460 2,731,629 SH   DFND N/A 2,731,629 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 1,164,963 39,814,198 SH   DFND N/A 35,784,387 0 4,029,811
EOG RES INC COM 26875P101 37,128 445,078 SH   DFND N/A 445,078 0 0
EQT CORP COM 26884L109 24,216 312,752 SH   DFND N/A 312,752 0 0
EQT GP HLDGS LP COM UNIT REP 26885J103 41,067 1,611,087 SH   DFND N/A 1,374,767 0 236,320
EQT MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 772,475 9,619,868 SH   DFND N/A 8,670,087 0 949,781
EXXON MOBIL CORP COM 30231G102 3 35 SH   DFND N/A 35 0 0
FIRST SOLAR INC COM 336433107 2 42 SH   DFND N/A 42 0 0
FMC TECHNOLOGIES INC COM 30249U101 1 31 SH   DFND N/A 31 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 13 300 SH   DFND N/A 300 0 0
GENESIS ENERGY L P UNIT LTD PARTN 371927104 323,085 8,420,244 SH   DFND N/A 7,716,492 0 703,752
GULFPORT ENERGY CORP COM NEW 402635304 6,350 203,145 SH   DFND N/A 203,145 0 0
HALLIBURTON CO COM 406216101 1,101 24,301 SH   DFND N/A 24,301 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 29 1,349 SH   DFND N/A 1,349 0 0
HD SUPPLY HLDGS INC COM 40416M105 2 68 SH   DFND N/A 68 0 0
HELMERICH & PAYNE INC COM 423452101 527 7,856 SH   DFND N/A 7,856 0 0
HESS CORP COM 42809H107 614 10,213 SH   DFND N/A 10,213 0 0
HOLLY ENERGY PARTNERS L P COM UT LTD PTN 435763107 3 76 SH   DFND N/A 76 0 0
IDEX CORP COM 45167R104 2 29 SH   DFND N/A 29 0 0
INFRAREIT INC COM 45685L100 1 73 SH   DFND N/A 73 0 0
ITC HLDGS CORP COM 465685105 1 23 SH   DFND N/A 23 0 0
ITRON INC COM 465741106 2 45 SH   DFND N/A 45 0 0
KINDER MORGAN INC DEL COM 49456B101 102,160 5,457,284 SH   DFND N/A 5,457,284 0 0
KINDER MORGAN INC DEL PFD SER A 49456B200 2,196 44,949 SH   DFND N/A 44,949 0 0
LAREDO PETROLEUM INC COM 516806106 425 40,563 SH   DFND N/A 40,563 0 0
LIBERTY PPTY TR SH BEN INT 531172104 18 450 SH   DFND N/A 450 0 0
LINDSAY CORP COM 535555106 0 6 SH   DFND N/A 6 0 0
LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 1,541 20,703 SH   DFND N/A 20,703 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 1,047,006 13,776,397 SH   DFND N/A 12,311,540 0 1,464,857
MARATHON PETE CORP COM 56585A102 628 16,551 SH   DFND N/A 16,551 0 0
MEMORIAL RESOURCE DEV CORP COM 58605Q109 2,441 153,723 SH   DFND N/A 153,723 0 0
MIX TELEMATICS LTD SPONSORED ADR 60688N102 21 4,480 SH   DFND N/A 4,480 0 0
MPLX LP COM UNIT REP LTD 55336V100 655,358 19,487,301 SH   DFND N/A 17,328,177 0 2,159,124
MRC GLOBAL INC COM 55345K103 1 63 SH   DFND N/A 63 0 0
MUELLER WTR PRODS INC COM SER A 624758108 2 137 SH   DFND N/A 137 0 0
NABORS INDUSTRIES LTD SHS G6359F103 1 131 SH   DFND N/A 131 0 0
NATIONAL FUEL GAS CO N J COM 636180101 29,222 513,740 SH   DFND N/A 513,740 0 0
NATIONAL OILWELL VARCO INC COM 637071101 1 22 SH   DFND N/A 22 0 0
NEWFIELD EXPL CO COM 651290108 11,609 262,766 SH   DFND N/A 262,766 0 0
NEWPARK RES INC COM PAR $.01NEW 651718504 1 91 SH   DFND N/A 91 0 0
NEXTERA ENERGY INC COM 65339F101 8 58 SH   DFND N/A 58 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 584 19,235 SH   DFND N/A 19,235 0 0
NISOURCE INC COM 65473P105 64,836 2,444,811 SH   DFND N/A 2,444,811 0 0
NOBLE ENERGY INC COM 655044105 1,629 45,414 SH   DFND N/A 45,414 0 0
NRG ENERGY INC COM NEW 629377508 1 75 SH   DFND N/A 75 0 0
NRG YIELD INC CL A NEW 62942X306 14 900 SH   DFND N/A 900 0 0
NRG YIELD INC CL C 62942X405 4 280 SH   DFND N/A 280 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 379 7,615 SH   DFND N/A 7,615 0 0
OCCIDENTAL PETE CORP DEL COM 674599105 4,373 57,871 SH   DFND N/A 57,871 0 0
ONEOK PARTNERS LP UNIT LTD PARTN 68268N103 690,351 17,232,926 SH   DFND N/A 15,743,122 0 1,489,804
ONEOK INC NEW COM 682680103 211,463 4,456,543 SH   DFND N/A 4,327,118 0 129,425
PARSLEY ENERGY INC CL A 701877102 6,312 233,256 SH   DFND N/A 233,256 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 27 1,196 SH   DFND N/A 1,196 0 0
PATTERSON UTI ENERGY INC COM 703481101 521 24,415 SH   DFND N/A 24,415 0 0
PDC ENERGY INC COM 69327R101 3,158 54,809 SH   DFND N/A 54,809 0 0
PEMBINA PIPELINE CORP COM 706327103 60,897 2,003,964 SH   DFND N/A 2,003,964 0 0
PENTAIR PLC SHS G7S00T104 3 45 SH   DFND N/A 45 0 0
PHILLIPS 66 COM 718546104 1,225 15,439 SH   DFND N/A 15,439 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 357,685 6,402,095 SH   DFND N/A 5,666,795 0 735,300
PINNACLE WEST CAP CORP COM 723484101 1 12 SH   DFND N/A 12 0 0
PIONEER NAT RES CO COM 723787107 32,110 212,356 SH   DFND N/A 212,356 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 886,958 32,264,748 SH   DFND N/A 28,986,788 0 3,277,960
PLAINS GP HLDGS L P SHS A REP LTPN 72651A108 183,543 17,597,644 SH   DFND N/A 16,993,196 0 604,448
PPL CORP COM 69351T106 4 93 SH   DFND N/A 93 0 0
PRECISION DRILLING CORP COM 2010 74022D308 0 40 SH   DFND N/A 40 0 0
QEP RES INC COM 74733V100 1 68 SH   DFND N/A 68 0 0
RANGE RES CORP COM 75281A109 8,796 203,904 SH   DFND N/A 203,904 0 0
RICE ENERGY INC COM 762760106 7,525 341,425 SH   DFND N/A 341,425 0 0
RICE MIDSTREAM PARTNERS LP UNIT LTD PARTN 762819100 34,189 1,673,450 SH   DFND N/A 1,673,450 0 0
ROSE ROCK MIDSTREAM L P COM U REP LTD 777149105 857 32,489 SH   DFND N/A 32,489 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 6,323 114,500 SH   DFND N/A 114,500 0 0
RSP PERMIAN INC COM 74978Q105 10,631 304,704 SH   DFND N/A 304,704 0 0
SCHLUMBERGER LTD COM 806857108 2,562 32,403 SH   DFND N/A 32,403 0 0
SCHNITZER STL INDS CL A 806882106 16 900 SH   DFND N/A 900 0 0
SEMGROUP CORP CL A 81663A105 68,220 2,095,219 SH   DFND N/A 2,095,219 0 0
SEMPRA ENERGY COM 816851109 8 71 SH   DFND N/A 71 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 337,952 10,001,545 SH   DFND N/A 8,951,364 0 1,050,181
SOLARCITY CORP COM 83416T100 1 27 SH   DFND N/A 27 0 0
SPECTRA ENERGY CORP COM 847560109 243,788 6,655,414 SH   DFND N/A 6,655,414 0 0
SPECTRA ENERGY PARTNERS LP COM 84756N109 573,947 12,165,045 SH   DFND N/A 11,005,012 0 1,160,033
SUNOCO LOGISTICS PRTNRS L P COM UNITS 86764L108 785,699 27,328,668 SH   DFND N/A 24,630,527 0 2,698,141
SUNPOWER CORP COM 867652406 1 88 SH   DFND N/A 88 0 0
SUNRUN INC COM 86771W105 1 168 SH   DFND N/A 168 0 0
SUPERIOR ENERGY SVCS INC COM 868157108 1 53 SH   DFND N/A 53 0 0
TALLGRASS ENERGY GP LP SHS CL A 874696107 8,316 368,449 SH   DFND N/A 368,449 0 0
TALLGRASS ENERGY PARTNERS LP COM UNIT 874697105 259,926 5,648,116 SH   DFND N/A 5,131,493 0 516,623
TARGA RES CORP COM 87612G101 93,732 2,224,289 SH   DFND N/A 2,224,289 0 0
TERRAFORM GLOBAL INC CL A 88104M101 8 2,600 SH   DFND N/A 2,600 0 0
TERRAFORM PWR INC CL A COM 88104R100 20 1,800 SH   DFND N/A 1,800 0 0
TESLA MTRS INC COM 88160R101 3 12 SH   DFND N/A 12 0 0
TESORO CORP COM 881609101 1,034 13,806 SH   DFND N/A 13,806 0 0
TESORO LOGISTICS LP COM UNIT LP 88160T107 503,268 10,160,871 SH   DFND N/A 9,130,218 0 1,030,653
TETRA TECH INC NEW COM 88162G103 4 117 SH   DFND N/A 117 0 0
TETRA TECHNOLOGIES INC DEL COM 88162F105 1 104 SH   DFND N/A 104 0 0
TRANSCANADA CORP COM 89353D107 167,477 3,703,612 SH   DFND N/A 3,703,612 0 0
U S SILICA HLDGS INC COM 90346E103 1 21 SH   DFND N/A 21 0 0
VALERO ENERGY CORP NEW COM 91913Y100 1,338 26,235 SH   DFND N/A 26,235 0 0
VALERO ENERGY PARTNERS LP COM UNT REP LP 91914J102 229,601 4,884,081 SH   DFND N/A 4,404,215 0 479,866
VTTI ENERGY PARTNERS LP COM UNIT RP LT Y9384M101 20,044 987,391 SH   DFND N/A 987,391 0 0
WATTS WATER TECHNOLOGIES INC CL A 942749102 4 67 SH   DFND N/A 67 0 0
WEATHERFORD INTL PLC ORD SHS G48833100 1 123 SH   DFND N/A 123 0 0
WEC ENERGY GROUP INC COM 92939U106 2 37 SH   DFND N/A 37 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 108,810 2,844,706 SH   DFND N/A 2,502,489 0 342,217
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 640,359 12,705,534 SH   DFND N/A 11,571,256 0 1,134,278
WESTLAKE CHEM CORP COM 960413102 658 15,327 SH   DFND N/A 15,327 0 0
WHITING PETE CORP NEW COM 966387102 25 2,663 SH   DFND N/A 2,663 0 0
WILLIAMS COS INC DEL COM 969457100 313,836 14,509,285 SH   DFND N/A 13,180,512 0 1,328,773
WILLIAMS PARTNERS L P NEW COM UNIT LTD PAR 96949L105 125,315 3,617,627 SH   DFND N/A 3,453,681 0 163,946
XYLEM INC COM 98419M100 8 181 SH   DFND N/A 181 0 0