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
ALGONQUIN PWR UTILS CORP COM 015857105 1,256 125,000 SH   SOLE 125,000 0 0
ALLIANCE RES PARTNER L P UT LTD PART 01877R108 24,276 1,400,000 SH   DFND 1 1,400,000 0 0
ALPS ETF TR ALERIAN MLP 00162Q866 1,586 181,691 SH   SOLE 181,691 0 0
ALTUS MIDSTREAM CO CL A 02215L100 3,790 490,255 SH   SOLE 490,255 0 0
ANADARKO PETE CORP COM 032511107 296 6,750 SH   SOLE 6,750 0 0
ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 26,928 2,408,580 SH   SOLE 2,408,580 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 48,597 2,271,949 SH   DFND 1 2,271,949 0 0
ANTERO RES CORP COM 03674X106 160 17,000 SH   SOLE 17,000 0 0
APERGY CORP COM 03755L104 3,171 117,081 SH   DFND 1 117,081 0 0
ATLANTICA YIELD PLC SHS G0751N103 7,629 389,260 SH   SOLE 389,260 0 0
AVANGRID INC COM 05351W103 2,304 46,000 SH   SOLE 46,000 0 0
BERRY PETE CORP COM 08579X101 394 45,000 SH   SOLE 45,000 0 0
BP PLC SPONSORED ADR 055622104 10,220 269,520 SH   DFND 1 269,520 0 0
C&J ENERGY SVCS INC NEW COM 12674R100 1,770 131,081 SH   DFND 1 131,081 0 0
CABOT OIL & GAS CORP COM 127097103 3,781 169,150 SH   DFND 1 169,150 0 0
CHENIERE ENERGY INC COM NEW 16411R208 60,987 1,030,357 SH   DFND 1 1,030,357 0 0
CHENIERE ENERGY PARTNERS LP COM UNIT 16411Q101 3,998 110,740 SH   SOLE 110,740 0 0
CHEVRON CORP NEW COM 166764100 2,514 23,110 SH   DFND 1 23,110 0 0
CIMAREX ENERGY CO COM 171798101 3,033 49,191 SH   DFND 1 49,191 0 0
CLEARWAY ENERGY INC CL C 18539C204 11,156 646,717 SH   DFND 1 646,717 0 0
CNX MIDSTREAM PARTNERS LP COM UNIT REPST 12654A101 42,238 2,594,496 SH   DFND 1 2,594,496 0 0
CONCHO RES INC COM 20605P101 5,935 57,738 SH   DFND 1 57,738 0 0
CONOCOPHILLIPS COM 20825C104 1,178 18,900 SH   DFND 1 18,900 0 0
CRESTWOOD EQUITY PARTNERS LP UNIT LTD PARTNER 226344208 35,781 1,282,000 SH   DFND 1 1,282,000 0 0
CVR ENERGY INC COM 12662P108 8,915 258,554 SH   DFND 1 258,554 0 0
DCP MIDSTREAM LP COM UT LTD PTN 23311P100 45,354 1,712,127 SH   DFND 1 1,712,127 0 0
DELEK US HLDGS INC NEW COM 24665A103 1,718 52,860 SH   DFND 1 52,860 0 0
DEVON ENERGY CORP NEW COM 25179M103 3,780 167,699 SH   DFND 1 167,699 0 0
DIAMONDBACK ENERGY INC COM 25278X109 8,883 95,820 SH   DFND 1 95,820 0 0
DOMINION ENERGY INC COM 25746U109 1,279 17,905 SH   SOLE 17,905 0 0
EATON CORP PLC SHS G29183103 4,554 66,322 SH   DFND 1 66,322 0 0
ENABLE MIDSTREAM PARTNERS LP COM UNIT RP IN 292480100 39,048 2,886,053 SH   DFND 1 2,886,053 0 0
ENBRIDGE INC COM 29250N105 94,148 3,029,230 SH   DFND 1 3,029,230 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 199,388 15,093,702 SH   DFND 1 15,093,702 0 0
ENERPLUS CORP COM 292766102 310 40,000 SH   DFND 1 40,000 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 19,325 2,036,330 SH   SOLE 2,036,330 0 0
ENLINK MIDSTREAM PARTNERS LP COM UNIT REP LTD 29336U107 34,407 3,125,050 SH   DFND 1 3,125,050 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 169,133 6,878,126 SH   DFND 1 6,878,126 0 0
EOG RES INC COM 26875P101 2,585 29,636 SH   DFND 1 29,636 0 0
EQM MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 34,044 787,140 SH   DFND 1 787,140 0 0
EQT CORP COM 26884L109 210 11,100 SH   SOLE 11,100 0 0
EQUITRANS MIDSTREAM CORPORAT COM 294600101 3,835 191,560 SH   SOLE 191,560 0 0
EXTRACTION OIL AND GAS INC COM 30227M105 1,659 386,707 SH   DFND 1 386,707 0 0
FIRST TR EXCHANGE TRADED FD NO AMER ENERGY 33738D101 572 26,682 SH   SOLE 26,682 0 0
GARDNER DENVER HLDGS INC COM 36555P107 2,406 117,663 SH   DFND 1 117,663 0 0
GASLOG PARTNERS LP UNIT LTD PTNRP Y2687W108 10,025 506,314 SH   DFND 1 506,314 0 0
GOLAR LNG LTD BERMUDA SHS G9456A100 3,019 138,761 SH   DFND 1 138,761 0 0
GOLAR LNG PARTNERS LP COM UNIT LPI Y2745C102 3,283 303,980 SH   DFND 1 303,980 0 0
HOLLYFRONTIER CORP COM 436106108 5,137 100,491 SH   DFND 1 100,491 0 0
HUNT J B TRANS SVCS INC COM 445658107 1,962 21,084 SH   DFND 1 21,084 0 0
IDEX CORP COM 45167R104 2,787 22,075 SH   DFND 1 22,075 0 0
JACOBS ENGR GROUP INC DEL COM 469814107 3,607 61,696 SH   DFND 1 61,696 0 0
JAGGED PEAK ENERGY INC COM 47009K107 802 87,913 SH   DFND 1 87,913 0 0
JPMORGAN CHASE FINL CO LLC CUSHING MLP 37 48129G703 2,991 200,000 SH   SOLE 200,000 0 0
KIMBELL RTY PARTNERS LP UNIT 49435R102 747 55,000 SH   DFND 1 55,000 0 0
KINDER MORGAN INC DEL COM 49456B101 163,892 10,656,162 SH   DFND 1 10,656,162 0 0
KIRBY CORP COM 497266106 2,879 42,734 SH   DFND 1 42,734 0 0
KNIGHT SWIFT TRANSN HLDGS IN CL A 499049104 2,259 90,102 SH   DFND 1 90,102 0 0
LIBERTY OILFIELD SVCS INC COM CL A 53115L104 2,279 175,985 SH   DFND 1 175,985 0 0
LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 6,201 74,565 SH   DFND 1 74,565 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 66,756 1,169,933 SH   DFND 1 1,169,933 0 0
MARATHON OIL CORP COM 565849106 1,147 80,000 SH   DFND 1 80,000 0 0
MARATHON PETE CORP COM 56585A102 2,958 50,129 SH   DFND 1 50,129 0 0
MPLX LP COM UNIT REP LTD 55336V100 129,148 4,262,303 SH   DFND 1 4,262,303 0 0
NAVISTAR INTL CORP NEW COM 63934E108 1,791 69,036 SH   DFND 1 69,036 0 0
NEXTERA ENERGY INC COM 65339F101 4,093 23,550 SH   SOLE 23,550 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 83,911 1,949,150 SH   DFND 1 1,949,150 0 0
NOBLE ENERGY INC COM 655044105 3,046 162,342 SH   DFND 1 162,342 0 0
NOBLE MIDSTREAM PARTNERS LP COM UNIT REPST 65506L105 23,776 824,413 SH   DFND 1 824,413 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 29,375 1,403,475 SH   DFND 1 1,403,475 0 0
OCCIDENTAL PETE CORP DEL COM 674599105 1,903 31,007 SH   DFND 1 31,007 0 0
OLIN CORP COM PAR $1 680665205 1,609 80,000 SH   SOLE 80,000 0 0
ONEOK INC NEW COM 682680103 159,032 2,947,764 SH   DFND 1 2,947,764 0 0
OSHKOSH CORP COM 688239201 2,675 43,624 SH   DFND 1 43,624 0 0
PARKER HANNIFIN CORP COM 701094104 1,625 10,897 SH   DFND 1 10,897 0 0
PARSLEY ENERGY INC CL A 701877102 4,953 309,951 SH   DFND 1 309,951 0 0
PATTERSON UTI ENERGY INC COM 703481101 5,254 507,635 SH   DFND 1 507,635 0 0
PEMBINA PIPELINE CORP COM 706327103 76,342 2,573,026 SH   DFND 1 2,573,026 0 0
PHILLIPS 66 COM 718546104 3,863 44,840 SH   SOLE 44,840 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 52,267 1,241,202 SH   DFND 1 1,241,202 0 0
PIONEER NAT RES CO COM 723787107 8,074 61,389 SH   DFND 1 61,389 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 52,802 2,634,813 SH   DFND 1 2,634,813 0 0
PLAINS GP HLDGS L P LTD PARTNR INT A 72651A207 49,815 2,478,375 SH   SOLE 2,478,375 0 0
PPL CORP COM 69351T106 3,116 110,000 SH   SOLE 110,000 0 0
ROSEHILL RES INC CL A 777385105 1,375 616,551 SH   DFND 1 616,551 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 9,753 167,378 SH   DFND 1 167,378 0 0
RUSH ENTERPRISES INC CL A 781846209 874 25,345 SH   DFND 1 25,345 0 0
SCHLUMBERGER LTD COM 806857108 1,912 53,000 SH   SOLE 53,000 0 0
SELECT ENERGY SVCS INC CL A COM 81617J301 1,175 185,958 SH   DFND 1 185,958 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 1,262 76,898 SH   SOLE 76,898 0 0
SUMMIT MATLS INC CL A 86614U100 1,148 92,611 SH   DFND 1 92,611 0 0
SUNCOR ENERGY INC NEW COM 867224107 2,605 93,130 SH   DFND 1 93,130 0 0
SUNOCO LP COM U REP LP 86765K109 6,254 230,000 SH   SOLE 230,000 0 0
TALLGRASS ENERGY LP CLASS A SHS 874696107 45,155 1,855,165 SH   DFND 1 1,855,165 0 0
TARGA RES CORP COM 87612G101 90,960 2,525,275 SH   DFND 1 2,525,275 0 0
TARGA RES CORP COM 87612G101 37 150,000 SH Call SOLE 150,000 0 0
TC PIPELINES LP UT COM LTD PRT 87233Q108 5,062 157,600 SH   SOLE 157,600 0 0
TECHNIPFMC PLC COM G87110105 1,543 78,785 SH   DFND 1 78,785 0 0
TELLURIAN INC NEW COM 87968A104 3,743 538,492 SH   DFND 1 538,492 0 0
TOTAL S A SPONSORED ADR 89151E109 2,591 49,658 SH   DFND 1 49,658 0 0
TRANSCANADA CORP COM 89353D107 4,073 114,100 SH   SOLE 114,100 0 0
U S WELL SVCS INC CL A 91274U101 825 126,903 SH   DFND 1 126,903 0 0
UBS AG JERSEY BRH ALERIAN INFRST 902641646 1,828 92,464 SH   SOLE 92,464 0 0
UNION PAC CORP COM 907818108 4,294 31,061 SH   DFND 1 31,061 0 0
UNITED RENTALS INC COM 911363109 4,420 43,111 SH   DFND 1 43,111 0 0
VALERO ENERGY CORP NEW COM 91913Y100 10,019 133,644 SH   DFND 1 133,644 0 0
VERMILION ENERGY INC COM 923725105 6,568 311,725 SH   DFND 1 311,725 0 0
VIPER ENERGY PARTNERS LP COM UNT RP INT 92763M105 8,772 336,876 SH   DFND 1 336,876 0 0
VISTRA ENERGY CORP COM 92840M102 1,522 66,500 SH   SOLE 66,500 0 0
VIVINT SOLAR INC COM 92854Q106 45 11,800 SH   SOLE 11,800 0 0
VULCAN MATLS CO COM 929160109 1,936 19,591 SH   DFND 1 19,591 0 0
WABTEC CORP COM 929740108 3,029 43,114 SH   DFND 1 43,114 0 0
WESTERN GAS EQUITY PARTNERS COMUNT LTD PT 95825R103 15,483 558,360 SH   SOLE 558,360 0 0
WESTERN GAS PARTNERS LP COM UNIT LP IN 958254104 64,235 1,521,078 SH   DFND 1 1,521,078 0 0
WESTLAKE CHEM CORP COM 960413102 3,793 57,319 SH   DFND 1 57,319 0 0
WHITING PETE CORP NEW COM NEW 966387409 1,565 68,973 SH   DFND 1 68,973 0 0
WILLIAMS COS INC DEL COM 969457100 135,690 6,153,744 SH   DFND 1 6,153,744 0 0
WPX ENERGY INC COM 98212B103 1,725 152,000 SH   DFND 1 152,000 0 0
XPO LOGISTICS INC COM 983793100 4,999 87,639 SH   DFND 1 87,639 0 0
XYLEM INC COM 98419M100 6,746 101,110 SH   DFND 1 101,110 0 0