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
ABENGOA YIELD PLC ORD SHS G00349103 1,551 45,900 SH   SOLE N/A 45,900 0 0
ACUITY BRANDS INC COM 00508Y102 5 27 SH   SOLE N/A 27 0 0
AMERICAN WTR WKS CO INC NEW COM 030420103 1 23 SH   SOLE N/A 23 0 0
ANADARKO PETE CORP COM 032511107 34,994 422,578 SH   SOLE N/A 422,578 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 182,318 7,536,924 SH   SOLE N/A 6,858,060 0 678,864
ANTERO RES CORP COM 03674X106 6,820 193,090 SH   SOLE N/A 193,090 0 0
APACHE CORP COM 037411105 1 14 SH   SOLE N/A 14 0 0
AQUA AMERICA INC COM 03836W103 1 38 SH   SOLE N/A 38 0 0
ASPEN AEROGELS INC COM 04523Y105 1 69 SH   SOLE N/A 69 0 0
BAKER HUGHES INC COM 057224107 1,879 29,555 SH   SOLE N/A 29,555 0 0
BIOAMBER INC COM 09072Q106 1 58 SH   SOLE N/A 58 0 0
BP PLC SPONSORED ADR 055622104 3,770 96,400 SH   SOLE N/A 96,400 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 812,832 10,763,141 SH   SOLE N/A 9,937,205 0 825,936
C&J ENERGY SVCS INC COM 12467B304 1 89 SH   SOLE N/A 89 0 0
CABOT OIL & GAS CORP COM 127097103 8,780 297,324 SH   SOLE N/A 297,324 0 0
CALPINE CORP COM NEW 131347304 1 50 SH   SOLE N/A 50 0 0
CAMERON INTERNATIONAL CORP COM 13342B105 1 22 SH   SOLE N/A 22 0 0
CANADIAN SOLAR INC COM 136635109 1 33 SH   SOLE N/A 33 0 0
CARRIZO OIL & GAS INC COM 144577103 11,164 224,846 SH   SOLE N/A 224,846 0 0
CENOVUS ENERGY INC COM 15135U109 2,586 153,200 SH   SOLE N/A 153,200 0 0
CENTERPOINT ENERGY INC COM 15189T107 5,169 253,253 SH   SOLE N/A 253,253 0 0
CHART INDS INC COM PAR $0.01 16115Q308 0 11 SH   SOLE N/A 11 0 0
CHENIERE ENERGY INC COM NEW 16411R208 44,406 573,727 SH   SOLE N/A 573,727 0 0
CHESAPEAKE ENERGY CORP COM 165167107 4,089 288,802 SH   SOLE N/A 288,802 0 0
CHEVRON CORP NEW COM 166764100 2 18 SH   SOLE N/A 18 0 0
CIMAREX ENERGY CO COM 171798101 14,370 124,859 SH   SOLE N/A 124,859 0 0
CMS ENERGY CORP COM 125896100 2 49 SH   SOLE N/A 49 0 0
COLUMBIA PIPELINE PARTNERS L COM UT REPSTG 198281107 165,935 5,992,596 SH   SOLE N/A 5,576,143 0 416,453
CONCHO RES INC COM 20605P101 17,506 151,017 SH   SOLE N/A 151,017 0 0
CONOCOPHILLIPS COM 20825C104 2 28 SH   SOLE N/A 28 0 0
CONTINENTAL RESOURCES INC COM 212015101 8,420 192,810 SH   SOLE N/A 192,810 0 0
CORE LABORATORIES N V COM N22717107 1 8 SH   SOLE N/A 8 0 0
DCP MIDSTREAM PARTNERS LP COM UT LTD PTN 23311P100 364,530 9,865,502 SH   SOLE N/A 9,120,065 0 745,437
DEVON ENERGY CORP NEW COM 25179M103 7,936 131,588 SH   SOLE N/A 131,588 0 0
DHT HOLDINGS INC SHS NEW Y2065G121 224 32,134 SH   SOLE N/A 32,134 0 0
DIAMONDBACK ENERGY INC COM 25278X109 1,094 14,243 SH   SOLE N/A 14,243 0 0
DOMINION MIDSTREAM PARTNERS COM UT REP LTD 257454108 109,294 2,632,965 SH   SOLE N/A 2,465,930 0 167,035
DOMINION RES INC VA NEW COM 25746U109 5 70 SH   SOLE N/A 70 0 0
DORIAN LPG LTD SHS USD Y2106R110 1,164 89,348 SH   SOLE N/A 89,348 0 0
DRIL-QUIP INC COM 262037104 1 12 SH   SOLE N/A 12 0 0
DTE ENERGY CO COM 233331107 2 29 SH   SOLE N/A 29 0 0
EASTMAN CHEM CO COM 277432100 1 17 SH   SOLE N/A 17 0 0
EDISON INTL COM 281020107 4 58 SH   SOLE N/A 58 0 0
EMERGE ENERGY SVCS LP COM REP PARTN 29102H108 1 24 SH   SOLE N/A 24 0 0
ENBRIDGE ENERGY MANAGEMENT L SHS UNITS LLI 29250X103 53,672 1,475,321 SH   SOLE N/A 1,475,321 0 0
ENBRIDGE ENERGY PARTNERS L P COM 29250R106 568,326 15,782,442 SH   SOLE N/A 14,615,607 0 1,166,835
ENBRIDGE INC COM 29250N105 188,000 3,876,287 SH   SOLE N/A 3,876,287 0 0
ENCANA CORP COM 292505104 3,461 310,380 SH   SOLE N/A 310,380 0 0
ENERGEN CORP COM 29265N108 5,551 84,112 SH   SOLE N/A 84,112 0 0
ENERGY TRANSFER EQUITY L P COM UT LTD PTN 29273V100 905,328 14,288,640 SH   SOLE N/A 12,723,439 0 1,565,201
ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 361,613 6,486,326 SH   SOLE N/A 6,486,326 0 0
ENERPLUS CORP COM 292766102 2,797 275,800 SH   SOLE N/A 275,800 0 0
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 192,369 7,775,615 SH   SOLE N/A 7,407,892 0 367,723
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 38,113 1,171,251 SH   SOLE N/A 1,171,251 0 0
ENPHASE ENERGY INC COM 29355A107 1 112 SH   SOLE N/A 112 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 1,261,759 38,316,400 SH   SOLE N/A 35,148,255 0 3,168,145
EOG RES INC COM 26875P101 43,152 470,624 SH   SOLE N/A 470,624 0 0
EP ENERGY CORP CL A 268785102 2,118 202,065 SH   SOLE N/A 202,065 0 0
EQT CORP COM 26884L109 23,446 282,931 SH   SOLE N/A 282,931 0 0
EQT MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 452,519 5,826,924 SH   SOLE N/A 5,364,832 0 462,092
EXTERRAN HLDGS INC COM 30225X103 1 24 SH   SOLE N/A 24 0 0
EXXON MOBIL CORP COM 30231G102 1 15 SH   SOLE N/A 15 0 0
FIRST SOLAR INC COM 336433107 2 40 SH   SOLE N/A 40 0 0
FLUOR CORP NEW COM 343412102 0 4 SH   SOLE N/A 4 0 0
FMC TECHNOLOGIES INC COM 30249U101 1 32 SH   SOLE N/A 32 0 0
FMSA HLDGS INC COM 30255X106 0 51 SH   SOLE N/A 51 0 0
FORUM ENERGY TECHNOLOGIES IN COM 34984V100 1 41 SH   SOLE N/A 41 0 0
FRANKS INTL N V COM N33462107 1 53 SH   SOLE N/A 53 0 0
GENESIS ENERGY L P UNIT LTD PARTN 371927104 208,220 4,430,215 SH   SOLE N/A 3,948,246 0 481,969
HALLIBURTON CO COM 406216101 1 17 SH   SOLE N/A 17 0 0
HELMERICH & PAYNE INC COM 423452101 433 6,360 SH   SOLE N/A 6,360 0 0
HESS CORP COM 42809H107 3,395 50,028 SH   SOLE N/A 50,028 0 0
HOEGH LNG PARTNERS LP COM UNIT LTD Y3262R100 1,040 47,934 SH   SOLE N/A 47,934 0 0
HOLLY ENERGY PARTNERS L P COM UT LTD PTN 435763107 97,114 3,088,876 SH   SOLE N/A 3,088,876 0 0
HOLLYFRONTIER CORP COM 436106108 894 22,195 SH   SOLE N/A 22,195 0 0
INFRAREIT INC COM 45685L100 5,282 184,751 SH   SOLE N/A 184,751 0 0
ITC HLDGS CORP COM 465685105 1 25 SH   SOLE N/A 25 0 0
ITRON INC COM 465741106 1 40 SH   SOLE N/A 40 0 0
KINDER MORGAN INC DEL COM 49456B101 250,866 5,964,491 SH   SOLE N/A 5,964,491 0 0
LAREDO PETROLEUM INC COM 516806106 4,238 325,034 SH   SOLE N/A 325,034 0 0
LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 2,473 28,170 SH   SOLE N/A 28,170 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 1,255,074 16,361,289 SH   SOLE N/A 15,000,535 0 1,360,754
MARATHON OIL CORP COM 565849106 16,262 622,836 SH   SOLE N/A 622,836 0 0
MARATHON PETE CORP COM 56585A102 1,118 10,922 SH   SOLE N/A 10,922 0 0
MARKWEST ENERGY PARTNERS L P UNIT LTD PARTN 570759100 752,757 11,388,160 SH   SOLE N/A 10,572,092 0 816,068
MAXWELL TECHNOLOGIES INC COM 577767106 1 122 SH   SOLE N/A 122 0 0
MPLX LP COM UNIT REP LTD 55336V100 421,565 5,754,374 SH   SOLE N/A 5,299,095 0 455,279
NABORS INDUSTRIES LTD SHS G6359F103 1 100 SH   SOLE N/A 100 0 0
NATIONAL FUEL GAS CO N J COM 636180101 27,916 462,729 SH   SOLE N/A 462,729 0 0
NATIONAL OILWELL VARCO INC COM 637071101 1 23 SH   SOLE N/A 23 0 0
NEWFIELD EXPL CO COM 651290108 11,971 341,161 SH   SOLE N/A 341,161 0 0
NEWPARK RES INC COM PAR $.01NEW 651718504 1 68 SH   SOLE N/A 68 0 0
NEXTERA ENERGY INC COM 65339F101 6 62 SH   SOLE N/A 62 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 4,573 104,359 SH   SOLE N/A 104,359 0 0
NISOURCE INC COM 65473P105 210,391 4,764,281 SH   SOLE N/A 4,764,281 0 0
NOBLE ENERGY INC COM 655044105 13,145 268,822 SH   SOLE N/A 268,822 0 0
NORDIC AMERICAN TANKERS LIMI COM G65773106 254 21,323 SH   SOLE N/A 21,323 0 0
NRG ENERGY INC COM NEW 629377508 2 64 SH   SOLE N/A 64 0 0
NRG YIELD INC COM CL A 62942X108 5,333 105,129 SH   SOLE N/A 105,129 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 83,896 1,382,134 SH   SOLE N/A 1,382,134 0 0
OCCIDENTAL PETE CORP DEL COM 674599105 17,046 233,501 SH   SOLE N/A 233,501 0 0
ONE GAS INC COM 68235P108 2 53 SH   SOLE N/A 53 0 0
ONEOK PARTNERS LP UNIT LTD PARTN 68268N103 301,040 7,371,199 SH   SOLE N/A 7,371,199 0 0
ONEOK INC NEW COM 682680103 360,885 7,481,035 SH   SOLE N/A 6,796,525 0 684,510
PATTERN ENERGY GROUP INC CL A 70338P100 2 80 SH   SOLE N/A 80 0 0
PATTERSON UTI ENERGY INC COM 703481101 225 11,999 SH   SOLE N/A 11,999 0 0
PEMBINA PIPELINE CORP COM 706327103 56,131 1,776,441 SH   SOLE N/A 1,776,441 0 0
PENN WEST PETE LTD NEW COM 707887105 11 6,400 SH   SOLE N/A 6,400 0 0
PHILLIPS 66 COM 718546104 2,339 29,764 SH   SOLE N/A 29,764 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 267,507 3,785,301 SH   SOLE N/A 3,462,749 0 322,552
PINNACLE WEST CAP CORP COM 723484101 1 15 SH   SOLE N/A 15 0 0
PIONEER NAT RES CO COM 723787107 38,977 238,378 SH   SOLE N/A 238,378 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 1,219,947 25,014,285 SH   SOLE N/A 23,101,379 0 1,912,906
PLAINS GP HLDGS L P SHS A REP LTPN 72651A108 242,465 8,546,537 SH   SOLE N/A 8,002,933 0 543,604
POLYPORE INTL INC COM 73179V103 2 42 SH   SOLE N/A 42 0 0
PPL CORP COM 69351T106 2 70 SH   SOLE N/A 70 0 0
PRECISION DRILLING CORP COM 2010 74022D308 0 40 SH   SOLE N/A 40 0 0
QEP RES INC COM 74733V100 1 56 SH   SOLE N/A 56 0 0
QUESTAR CORP COM 748356102 1 25 SH   SOLE N/A 25 0 0
RANGE RES CORP COM 75281A109 15,089 289,956 SH   SOLE N/A 289,956 0 0
REGENCY ENERGY PARTNERS L P COM UNITS L P 75885Y107 305,718 13,367,638 SH   SOLE N/A 12,999,658 0 367,980
ROSE ROCK MIDSTREAM L P COM U REP LTD 777149105 1,543 32,489 SH   SOLE N/A 32,489 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 6,830 114,500 SH   SOLE N/A 114,500 0 0
RPC INC COM 749660106 1 68 SH   SOLE N/A 68 0 0
RSP PERMIAN INC COM 74978Q105 3,037 120,559 SH   SOLE N/A 120,559 0 0
SCHLUMBERGER LTD COM 806857108 2 29 SH   SOLE N/A 29 0 0
SEMGROUP CORP CL A 81663A105 47,594 585,123 SH   SOLE N/A 585,123 0 0
SEMPRA ENERGY COM 816851109 5 49 SH   SOLE N/A 49 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 192,133 4,926,479 SH   SOLE N/A 4,545,493 0 380,986
SOLARCITY CORP COM 83416T100 6 112 SH   SOLE N/A 112 0 0
SPECTRA ENERGY CORP COM 847560109 456,292 12,615,217 SH   SOLE N/A 11,737,409 0 877,808
SPECTRA ENERGY PARTNERS LP COM 84756N109 532,615 10,284,121 SH   SOLE N/A 9,760,598 0 523,523
SUMMIT MIDSTREAM PARTNERS LP COM UNIT LTD 866142102 17,133 532,573 SH   SOLE N/A 532,573 0 0
SUNCOR ENERGY INC NEW COM 867224107 14,931 510,456 SH   SOLE N/A 510,456 0 0
SUNEDISON INC COM 86732Y109 5 228 SH   SOLE N/A 228 0 0
SUNOCO LOGISTICS PRTNRS L P COM UNITS 86764L108 764,253 18,487,016 SH   SOLE N/A 17,053,890 0 1,433,126
SUNPOWER CORP COM 867652406 5 174 SH   SOLE N/A 174 0 0
SUPERIOR ENERGY SVCS INC COM 868157108 1 45 SH   SOLE N/A 45 0 0
TARGA RESOURCES PARTNERS LP COM UNIT 87611X105 201,636 4,875,134 SH   SOLE N/A 4,875,134 0 0
TARGA RES CORP COM 87612G101 291,662 3,044,811 SH   SOLE N/A 2,741,119 0 303,692
TEEKAY OFFSHORE PARTNERS L P PARTNERSHIP UN Y8565J101 4,714 223,330 SH   SOLE N/A 223,330 0 0
TERRAFORM PWR INC CL A COM 88104R100 9,628 266,446 SH   SOLE N/A 266,446 0 0
TESLA MTRS INC COM 88160R101 5 28 SH   SOLE N/A 28 0 0
TESORO LOGISTICS LP COM UNIT LP 88160T107 450,912 8,381,269 SH   SOLE N/A 7,697,112 0 684,157
TETRA TECHNOLOGIES INC DEL COM 88162F105 1 81 SH   SOLE N/A 81 0 0
TRANSCANADA CORP COM 89353D107 123,615 2,893,617 SH   SOLE N/A 2,893,617 0 0
U S SILICA HLDGS INC COM 90346E103 1,065 29,915 SH   SOLE N/A 29,915 0 0
VALERO ENERGY CORP NEW COM 91913Y100 2,333 36,672 SH   SOLE N/A 36,672 0 0
VALERO ENERGY PARTNERS LP COM UNT REP LP 91914J102 173,463 3,583,954 SH   SOLE N/A 3,285,135 0 298,819
VTTI ENERGY PARTNERS LP COM UNIT RP LT Y9384M101 13,236 533,299 SH   SOLE N/A 533,299 0 0
WEATHERFORD INTL PLC ORD SHS G48833100 1 110 SH   SOLE N/A 110 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 132,723 2,212,058 SH   SOLE N/A 1,940,523 0 271,535
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 565,319 8,584,950 SH   SOLE N/A 7,968,745 0 616,205
WESTERN REFNG INC COM 959319104 1 27 SH   SOLE N/A 27 0 0
WESTLAKE CHEM CORP COM 960413102 1,847 25,676 SH   SOLE N/A 25,676 0 0
WHITING PETE CORP NEW COM 966387102 4,918 159,174 SH   SOLE N/A 159,174 0 0
WILLIAMS COS INC DEL COM 969457100 402,427 7,954,667 SH   SOLE N/A 7,497,663 0 457,004
WILLIAMS PARTNERS L P COM UNIT L P 96950F104 313,750 6,374,444 SH   SOLE N/A 6,374,444 0 0
WISCONSIN ENERGY CORP COM 976657106 2 47 SH   SOLE N/A 47 0 0