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
ALLIANCE RES PARTNER L P UT LTD PART 01877R108 16,288 800,000 SH   DFND 1 800,000 0 0
ALTUS MIDSTREAM CO CL A 02215L100 24,909 4,221,898 SH   SOLE 4,221,898 0 0
AMERIGAS PARTNERS L P UNIT L P INT 030975106 761 24,653 SH   SOLE 24,653 0 0
ANADARKO PETE CORP COM 032511107 307 6,750 SH   SOLE 6,750 0 0
ANTERO MIDSTREAM CORP COM 03676B102 44,316 3,215,994 SH   DFND 1 3,215,994 0 0
APERGY CORP COM 03755L104 533 12,980 SH   DFND 1 12,980 0 0
ATLANTICA YIELD PLC SHS G0751N103 9,267 476,230 SH   SOLE 476,230 0 0
BP PLC SPONSORED ADR 055622104 11,565 264,520 SH   DFND 1 264,520 0 0
BUCKEYE PARTNERS L P UNIT LTD PARTN 118230101 43,371 1,274,870 SH   DFND 1 1,274,870 0 0
CABOT OIL & GAS CORP COM 127097103 1,706 65,350 SH   DFND 1 65,350 0 0
CACTUS INC CL A 127203107 3,560 100,000 SH   DFND 1 100,000 0 0
CANADIAN NAT RES LTD COM 136385101 1,375 50,000 SH   DFND 1 50,000 0 0
CHENIERE ENERGY INC COM NEW 16411R208 73,289 1,072,100 SH   DFND 1 1,072,100 0 0
CHENIERE ENERGY PARTNERS LP COM UNIT 16411Q101 1,899 45,300 SH   SOLE 45,300 0 0
CHEVRON CORP NEW COM 166764100 2,477 20,110 SH   DFND 1 20,110 0 0
CIMAREX ENERGY CO COM 171798101 3,993 57,131 SH   DFND 1 57,131 0 0
CLEARWAY ENERGY INC CL C 18539C204 9,821 649,992 SH   DFND 1 649,992 0 0
CNX MIDSTREAM PARTNERS LP COM UNIT REPST 12654A101 15,936 1,047,711 SH   SOLE 1,047,711 0 0
CONCHO RES INC COM 20605P101 5,826 52,505 SH   DFND 1 52,505 0 0
CONOCOPHILLIPS COM 20825C104 1,261 18,900 SH   DFND 1 18,900 0 0
CONTINENTAL RESOURCES INC COM 212015101 2,080 46,466 SH   DFND 1 46,466 0 0
CRESTWOOD EQUITY PARTNERS LP UNIT LTD PARTNER 226344208 73,387 2,085,456 SH   DFND 1 2,085,456 0 0
CVR ENERGY INC COM 12662P108 4,120 100,000 SH   SOLE 100,000 0 0
DCP MIDSTREAM LP COM UT LTD PTN 23311P100 78,213 2,366,516 SH   DFND 1 2,366,516 0 0
DELEK US HLDGS INC NEW COM 24665A103 1,541 42,299 SH   DFND 1 42,299 0 0
DIAMONDBACK ENERGY INC COM 25278X109 13,260 130,598 SH   DFND 1 130,598 0 0
DOMINION ENERGY INC COM 25746U109 1,510 19,700 SH   SOLE 19,700 0 0
EAGLE MATERIALS INC COM 26969P108 1,986 23,564 SH   DFND 1 23,564 0 0
EATON CORP PLC SHS G29183103 4,144 51,443 SH   DFND 1 51,443 0 0
ENABLE MIDSTREAM PARTNERS LP COM UNIT RP IN 292480100 48,669 3,398,642 SH   DFND 1 3,398,642 0 0
ENBRIDGE INC COM 29250N105 79,452 2,191,188 SH   DFND 1 2,191,188 0 0
ENCANA CORP COM 292505104 4,176 576,757 SH   DFND 1 576,757 0 0
ENERGY TRANSFER LP COM UT LTD PTN 29273V100 226,895 14,762,176 SH   DFND 1 14,762,176 0 0
ENLINK MIDSTREAM LLC COM UNIT REP LTD 29336T100 107,763 8,432,172 SH   DFND 1 8,432,172 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 202,429 6,956,309 SH   DFND 1 6,956,309 0 0
EOG RES INC COM 26875P101 1,462 15,356 SH   DFND 1 15,356 0 0
EQM MIDSTREAM PARTNERS LP UNIT LTD PARTN 26885B100 56,852 1,231,366 SH   DFND 1 1,231,366 0 0
EQUINOR ASA SPONSORED ADR 29446M102 1,538 70,000 SH   SOLE 70,000 0 0
EQUITRANS MIDSTREAM CORPORAT COM 294600101 3,168 145,450 SH   SOLE 145,450 0 0
FTS INTERNATIONAL INC COM 30283W104 1,621 162,080 SH   DFND 1 162,080 0 0
GARDNER DENVER HLDGS INC COM 36555P107 2,548 91,611 SH   DFND 1 91,611 0 0
GASLOG PARTNERS LP UNIT LTD PTNRP Y2687W108 16,370 723,361 SH   DFND 1 723,361 0 0
GOLAR LNG LTD BERMUDA SHS G9456A100 4,839 229,438 SH   DFND 1 229,438 0 0
GOLAR LNG PARTNERS LP COM UNIT LPI Y2745C102 3,494 270,624 SH   SOLE 270,624 0 0
GRAFTECH INTL LTD COM 384313508 2,046 160,000 SH   SOLE 160,000 0 0
HOLLYFRONTIER CORP COM 436106108 2,601 52,800 SH   DFND 1 52,800 0 0
HUNT J B TRANS SVCS INC COM 445658107 1,912 18,880 SH   DFND 1 18,880 0 0
IDEX CORP COM 45167R104 1,903 12,539 SH   DFND 1 12,539 0 0
ITRON INC COM 465741106 2,679 57,431 SH   DFND 1 57,431 0 0
JACOBS ENGR GROUP INC COM 469814107 4,253 56,569 SH   DFND 1 56,569 0 0
JPMORGAN CHASE FINL CO LLC CUSHING MLP 37 48129G703 3,526 200,000 SH   SOLE 200,000 0 0
KEANE GROUP INC COM 48669A108 494 45,356 SH   DFND 1 45,356 0 0
KIMBELL RTY PARTNERS LP UNIT 49435R102 1,062 58,138 SH   DFND 1 58,138 0 0
KINDER MORGAN INC DEL COM 49456B101 207,298 10,359,696 SH   DFND 1 10,359,696 0 0
KIRBY CORP COM 497266106 2,150 28,620 SH   DFND 1 28,620 0 0
LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 6,048 71,932 SH   DFND 1 71,932 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 132,320 2,182,421 SH   DFND 1 2,182,421 0 0
MARATHON OIL CORP COM 565849106 1,337 80,000 SH   DFND 1 80,000 0 0
MARATHON PETE CORP COM 56585A102 4,956 82,806 SH   DFND 1 82,806 0 0
MATADOR RES CO COM 576485205 2,812 145,479 SH   DFND 1 145,479 0 0
MCDERMOTT INTL INC COM 580037703 1,472 197,825 SH   DFND 1 197,825 0 0
MPLX LP COM UNIT REP LTD 55336V100 125,153 3,805,207 SH   DFND 1 3,805,207 0 0
NEW FORTRESS ENERGY LLC CL A SHS RP LLC 644393100 5,688 486,971 SH   DFND 1 486,971 0 0
NEXTERA ENERGY INC COM 65339F101 406 2,099 SH   SOLE 2,099 0 0
NEXTERA ENERGY PARTNERS LP COM UNIT PART IN 65341B106 77,772 1,667,486 SH   DFND 1 1,667,486 0 0
NOBLE ENERGY INC COM 655044105 926 37,455 SH   DFND 1 37,455 0 0
NOBLE MIDSTREAM PARTNERS LP COM UNIT REPST 65506L105 15,577 432,565 SH   SOLE 432,565 0 0
NUSTAR ENERGY LP UNIT COM 67058H102 26,218 975,000 SH   DFND 1 975,000 0 0
OCCIDENTAL PETE CORP COM 674599105 2,053 31,007 SH   DFND 1 31,007 0 0
ONEOK INC NEW COM 682680103 163,152 2,336,082 SH   DFND 1 2,336,082 0 0
OSHKOSH CORP COM 688239201 3,063 40,775 SH   DFND 1 40,775 0 0
PARSLEY ENERGY INC CL A 701877102 4,894 253,580 SH   DFND 1 253,580 0 0
PATTERN ENERGY GROUP INC CL A 70338P100 1,858 84,433 SH   SOLE 84,433 0 0
PATTERSON UTI ENERGY INC COM 703481101 3,744 267,034 SH   DFND 1 267,034 0 0
PEMBINA PIPELINE CORP COM 706327103 110,231 2,998,670 SH   DFND 1 2,998,670 0 0
PHILLIPS 66 COM 718546104 5,330 56,000 SH   SOLE 56,000 0 0
PHILLIPS 66 PARTNERS LP COM UNIT REP INT 718549207 66,963 1,279,146 SH   DFND 1 1,279,146 0 0
PIONEER NAT RES CO COM 723787107 5,434 35,682 SH   DFND 1 35,682 0 0
PLAINS ALL AMERN PIPELINE L UNIT LTD PARTN 726503105 104,847 4,277,710 SH   DFND 1 4,277,710 0 0
PLAINS GP HLDGS L P LTD PARTNR INT A 72651A207 79,291 3,181,802 SH   SOLE 3,181,802 0 0
PPL CORP COM 69351T106 3,491 110,000 SH   SOLE 110,000 0 0
ROSEHILL RES INC CL A 777385105 1,932 568,180 SH   DFND 1 568,180 0 0
ROYAL DUTCH SHELL PLC SPONS ADR A 780259206 10,257 163,878 SH   DFND 1 163,878 0 0
SELECT ENERGY SVCS INC CL A COM 81617J301 2,091 173,959 SH   DFND 1 173,959 0 0
SHELL MIDSTREAM PARTNERS L P UNIT LTD INT 822634101 27,813 1,360,053 SH   SOLE 1,360,053 0 0
SOUTHWEST AIRLS CO COM 844741108 4,470 86,107 SH   DFND 1 86,107 0 0
SUNCOR ENERGY INC NEW COM 867224107 1,464 45,130 SH   DFND 1 45,130 0 0
SUNOCO LP COM UT REP LP 86765K109 7,167 230,000 SH   SOLE 230,000 0 0
TALLGRASS ENERGY LP CLASS A SHS 874696107 7,596 302,141 SH   DFND 1 302,141 0 0
TARGA RES CORP COM 87612G101 143,672 3,457,812 SH   DFND 1 3,457,812 0 0
TELLURIAN INC NEW COM 87968A104 1,898 169,451 SH   DFND 1 169,451 0 0
TOTAL S A SPONSORED ADS 89151E109 2,541 45,658 SH   DFND 1 45,658 0 0
TRANSCANADA CORP COM 89353D107 6,817 151,690 SH   SOLE 151,690 0 0
U S WELL SVCS INC CL A 91274U101 1,013 126,903 SH   DFND 1 126,903 0 0
UNION PACIFIC CORP COM 907818108 4,688 28,038 SH   DFND 1 28,038 0 0
UNITED RENTALS INC COM 911363109 1,727 15,117 SH   DFND 1 15,117 0 0
VALERO ENERGY CORP NEW COM 91913Y100 15,755 185,720 SH   DFND 1 185,720 0 0
VERMILION ENERGY INC COM 923725105 6,618 267,937 SH   DFND 1 267,937 0 0
VIPER ENERGY PARTNERS LP COM UNT RP INT 92763M105 26,089 786,762 SH   DFND 1 786,762 0 0
VIVINT SOLAR INC COM 92854Q106 62 12,500 SH   SOLE 12,500 0 0
WABTEC CORP COM 929740108 3,766 51,091 SH   DFND 1 51,091 0 0
WESTERN MIDSTREAM PARTNERS L COM UNIT LP INT 958669103 81,875 2,610,813 SH   DFND 1 2,610,813 0 0
WESTLAKE CHEM CORP COM 960413102 1,499 22,085 SH   DFND 1 22,085 0 0
WILLIAMS COS INC DEL COM 969457100 177,372 6,175,909 SH   DFND 1 6,175,909 0 0
WPX ENERGY INC COM 98212B103 8,150 621,674 SH   DFND 1 621,674 0 0
XYLEM INC COM 98419M100 3,233 40,907 SH   DFND 1 40,907 0 0