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
3M CO COM 88579Y101 13,314 69,875 SH   OTR 1 69,875 0 0
3M CO COM 88579Y101 5,690 29,860 SH   OTR   29,860 0 0
ABBVIE INC COM 00287Y109 111 1,200 SH   OTR   1,200 0 0
ABBVIE INC COM 00287Y109 140 1,515 SH   OTR 1 1,515 0 0
ACETO CORP NOTE 2.000%11/0 004446AD2 32,181 43,414,000 PRN   OTR 1 43,414,000 0 0
AGILENT TECHNOLOGIES INC COM 00846U101 5,635 83,535 SH   OTR   83,535 0 0
AGILENT TECHNOLOGIES INC COM 00846U101 11,577 171,619 SH   OTR 1 171,295 0 0
AIR LEASE CORP CL A 00912X302 8,326 275,600 SH   OTR   275,600 0 0
AIR LEASE CORP CL A 00912X302 14,968 495,447 SH   OTR 1 495,262 0 0
AKAMAI TECHNOLOGIES INC DBCV 2/1 00971TAG6 11,436 11,500,000 PRN   OTR 1 11,500,000 0 0
ALPHABET INC CAP STK CL A 02079K305 828 792 SH   OTR   792 0 0
ALPHABET INC CAP STK CL A 02079K305 2,435 2,330 SH   OTR 1 2,325 0 0
ALPHABET INC CAP STK CL C 02079K107 19,336 18,671 SH   OTR   18,671 0 0
ALPHABET INC CAP STK CL C 02079K107 34,061 32,890 SH   OTR 1 32,880 0 0
ALTERYX INC COM CL A 02156B103 8,451 142,100 SH   OTR 1 142,100 0 0
AMERICAN EXPRESS CO COM 025816109 512 5,375 SH   SOLE   5,375 0 0
AMERICAN WTR WKS CO INC NEW COM 030420103 6,274 69,123 SH   OTR   69,123 0 0
AMERICAN WTR WKS CO INC NEW COM 030420103 15,594 171,801 SH   OTR 1 171,666 0 0
ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 3,534 316,070 SH   OTR   316,070 0 0
ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 5,946 531,885 SH   OTR 1 531,885 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 1,846 86,315 SH   OTR   86,315 0 0
ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 3,450 161,310 SH   OTR 1 161,310 0 0
APPLE INC COM 037833100 1,384 8,773 SH   OTR 1 8,773 0 0
AUDENTES THERAPEUTICS INC COM 05070R104 3,318 155,650 SH   OTR 1 155,650 0 0
AVALARA INC COM 05338G106 7,344 235,755 SH   OTR 1 235,755 0 0
AXOS FINL INC COM 05465C100 4,922 195,485 SH   OTR 1 195,485 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 1,836 6 SH   OTR   4 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 306 1 SH   OTR 1 0 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,493 26,900 SH   OTR   26,525 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,472 61,083 SH   OTR 1 59,821 0 0
BIO TECHNE CORP COM 09073M104 5,411 37,390 SH   OTR 1 37,390 0 0
BIOTELEMETRY INC COM 090672106 5,677 95,065 SH   OTR 1 95,065 0 0
BLUE BIRD CORP COM 095306106 44,346 2,437,938 SH   OTR 1 2,437,938 0 0
BOEING CO COM 097023105 17,332 53,742 SH   OTR 1 53,742 0 0
BOEING CO COM 097023105 8,730 27,071 SH   OTR   27,071 0 0
BOINGO WIRELESS INC COM 09739C102 4,054 197,095 SH   OTR 1 197,095 0 0
BRISTOL MYERS SQUIBB CO COM 110122108 552 10,617 SH   OTR   10,617 0 0
BRISTOL MYERS SQUIBB CO COM 110122108 139 2,672 SH   OTR 1 2,672 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 15,069 392,939 SH   OTR   392,939 0 0
BROOKFIELD ASSET MGMT INC CL A LTD VT SH 112585104 28,926 754,270 SH   OTR 1 753,270 0 0
CARE COM INC COM 141633107 2,470 127,900 SH   OTR 1 127,900 0 0
CAREDX INC COM 14167L103 5,243 208,550 SH   OTR 1 208,550 0 0
CAVCO INDS INC DEL COM 149568107 3,073 23,571 SH   OTR 1 23,571 0 0
CEMEX SAB DE CV NOTE 3.720% 3/1 151290BT9 42,746 43,838,000 PRN   OTR 1 43,838,000 0 0
CHARTER COMMUNICATIONS INC N CL A 16119P108 14,528 50,981 SH   OTR 1 50,940 0 0
CHARTER COMMUNICATIONS INC N CL A 16119P108 9,194 32,264 SH   OTR   32,264 0 0
CHEVRON CORP NEW COM 166764100 51 465 SH   OTR   465 0 0
CHEVRON CORP NEW COM 166764100 363 3,342 SH   OTR 1 555 0 0
CLEVELAND CLIFFS INC DBCV 1.500% 1/1 185899AA9 12,373 11,125,000 PRN   OTR 1 11,125,000 0 0
COGNIZANT TECHNOLOGY SOLUTIO CL A 192446102 3,067 48,315 SH   OTR   48,315 0 0
COGNIZANT TECHNOLOGY SOLUTIO CL A 192446102 8,214 129,395 SH   OTR 1 129,395 0 0
CROWN CASTLE INTL CORP NEW COM 22822V101 10,064 92,646 SH   OTR   92,646 0 0
CROWN CASTLE INTL CORP NEW COM 22822V101 18,824 173,290 SH   OTR 1 173,290 0 0
DANAHER CORP DEL COM 235851102 10,203 98,946 SH   OTR   98,946 0 0
DANAHER CORP DEL COM 235851102 19,979 193,745 SH   OTR 1 193,745 0 0
DIGITAL RLTY TR INC COM 253868103 7,436 69,790 SH   OTR   69,790 0 0
DIGITAL RLTY TR INC COM 253868103 14,352 134,700 SH   OTR 1 134,700 0 0
ENOVA INTL INC COM 29357K103 9,059 465,500 SH   OTR 1 465,500 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 11,394 463,375 SH   OTR   463,375 0 0
ENTERPRISE PRODS PARTNERS L COM 293792107 17,094 695,148 SH   OTR 1 694,988 0 0
ETSY INC COM 29786A106 11,559 242,995 SH   OTR 1 242,995 0 0
EXXON MOBIL CORP COM 30231G102 735 10,776 SH   OTR   10,776 0 0
EXXON MOBIL CORP COM 30231G102 916 13,431 SH   OTR 1 7,403 0 0
EZCORP INC NOTE 2.125% 6/1 302301AB2 14,481 14,875,000 PRN   OTR 1 14,875,000 0 0
EZCORP INC NOTE 2.875% 7/0 302301AF3 16,529 16,835,000 PRN   OTR 1 16,835,000 0 0
FIRST REP BK SAN FRANCISCO C COM 33616C100 1,487 17,110 SH   OTR   17,110 0 0
FIRST REP BK SAN FRANCISCO C COM 33616C100 83 952 SH   OTR 1 952 0 0
FLOOR & DECOR HLDGS INC CL A 339750101 3,016 116,435 SH   OTR 1 116,435 0 0
FUNKO INC COM CL A 361008105 5,048 383,900 SH   OTR 1 383,900 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 4,484 235,405 SH   OTR 1 235,405 0 0
HANNON ARMSTRONG SUST INFR C COM 41068X100 1,342 70,432 SH   OTR   70,432 0 0
HOLOGIC INC COM 436440101 8,220 200,005 SH   OTR   200,005 0 0
HOLOGIC INC COM 436440101 15,505 377,250 SH   OTR 1 377,250 0 0
HORIZON GLOBAL CORP NOTE 2.750% 7/0 44052WAA2 19,069 36,321,000 PRN   OTR 1 36,321,000 0 0
INOGEN INC COM 45780L104 991 7,980 SH   OTR 1 7,980 0 0
INSPIRE MED SYS INC COM 457730109 2,943 69,657 SH   OTR 1 69,657 0 0
INSULET CORP COM 45784P101 8,498 107,140 SH   OTR 1 107,140 0 0
INTERNATIONAL BUSINESS MACHS COM 459200101 235 2,064 SH   OTR 1 601 0 0
ISHARES TR CORE 1 5 YR USD 46432F859 263 5,370 PRN   OTR 1 5,370 0 0
JOHNSON & JOHNSON COM 478160104 12,150 94,154 SH   OTR 1 90,899 0 0
JOHNSON & JOHNSON COM 478160104 5,957 46,162 SH   OTR   46,162 0 0
JPMORGAN CHASE & CO COM 46625H100 8,214 84,143 SH   OTR   84,143 0 0
JPMORGAN CHASE & CO COM 46625H100 15,558 159,373 SH   OTR 1 159,373 0 0
KODIAK SCIENCES INC COM 50015M109 1,509 212,470 SH   OTR   212,470 0 0
KODIAK SCIENCES INC COM 50015M109 796 112,043 SH   OTR 1 112,043 0 0
LIGAND PHARMACEUTICALS INC COM NEW 53220K504 7,596 55,974 SH   OTR 1 55,974 0 0
LILLY ELI & CO COM 532457108 1,904 16,451 SH   OTR   16,451 0 0
LILLY ELI & CO COM 532457108 832 7,188 SH   OTR 1 7,188 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 4,423 77,507 SH   OTR   77,507 0 0
MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 12,156 213,046 SH   OTR 1 208,961 0 0
MCGRATH RENTCORP COM 580589109 203 3,939 SH   OTR 1 3,939 0 0
MEDIFAST INC COM 58470H101 2,827 22,610 SH   OTR 1 22,610 0 0
MERCK & CO INC COM 58933Y105 840 10,995 SH   OTR 1 10,730 0 0
MICROSOFT CORP COM 594918104 12,184 119,955 SH   OTR   119,955 0 0
MICROSOFT CORP COM 594918104 24,886 245,013 SH   OTR 1 243,675 0 0
MONOLITHIC PWR SYS INC COM 609839105 5,296 45,555 SH   OTR   45,555 0 0
MONOLITHIC PWR SYS INC COM 609839105 15,158 130,390 SH   OTR 1 130,390 0 0
NAVISTAR INTL CORP NEW NOTE 4.750% 4/1 63934EAS7 46,674 46,791,000 PRN   OTR 1 46,791,000 0 0
NEW RELIC INC COM 64829B100 6,928 85,560 SH   OTR 1 85,560 0 0
NEXTERA ENERGY INC COM 65339F101 11,265 64,810 SH   OTR   64,810 0 0
NEXTERA ENERGY INC COM 65339F101 20,163 115,999 SH   OTR 1 115,999 0 0
NOVARTIS A G SPONSORED ADR 66987V109 11,213 130,667 SH   OTR   130,667 0 0
NOVARTIS A G SPONSORED ADR 66987V109 20,715 241,406 SH   OTR 1 241,366 0 0
OSI SYSTEMS INC NOTE 1.250% 9/0 671044AD7 18,770 20,250,000 PRN   OTR 1 20,250,000 0 0
PIMCO ETF TR 0-5 HIGH YIELD 72201R783 591 6,215 PRN   OTR 1 6,215 0 0
PLANET FITNESS INC CL A 72703H101 11,496 214,390 SH   OTR 1 214,390 0 0
PROCTER AND GAMBLE CO COM 742718109 1,082 11,770 SH   OTR   11,770 0 0
PROCTER AND GAMBLE CO COM 742718109 1,513 16,458 SH   OTR 1 16,458 0 0
PURE STORAGE INC CL A 74624M102 4,409 274,175 SH   OTR 1 274,175 0 0
QUINSTREET INC COM 74874Q100 9,640 593,971 SH   OTR 1 593,971 0 0
RAMBUS INC DEL NOTE 1.375% 2/0 750917AG1 4,336 5,000,000 PRN   OTR 1 5,000,000 0 0
RAPID7 INC COM 753422104 7,902 253,585 SH   OTR 1 253,585 0 0
RPM INTL INC COM 749685103 12,982 220,855 SH   OTR 1 220,855 0 0
RPM INTL INC COM 749685103 7,452 126,781 SH   OTR   126,781 0 0
SAILPOINT TECHNLGIES HLDGS I COM 78781P105 2,133 90,825 SH   OTR 1 90,825 0 0
SENDGRID INC COM 816883102 10,345 239,640 SH   OTR 1 239,640 0 0
SERVICEMASTER GLOBAL HLDGS I COM 81761R109 6,603 179,726 SH   OTR   179,726 0 0
SERVICEMASTER GLOBAL HLDGS I COM 81761R109 11,559 314,625 SH   OTR 1 314,625 0 0
STAMPS COM INC COM NEW 852857200 4,314 27,715 SH   OTR 1 27,715 0 0
SYNOPSYS INC COM 871607107 5,314 63,085 SH   OTR   63,085 0 0
SYNOPSYS INC COM 871607107 8,424 99,995 SH   OTR 1 99,995 0 0
TELADOC HEALTH INC COM 87918A105 5,582 112,605 SH   OTR 1 112,605 0 0
TELEFLEX INC COM 879369106 7,203 27,865 SH   OTR   27,865 0 0
TELEFLEX INC COM 879369106 12,534 48,490 SH   OTR 1 48,410 0 0
TREX CO INC COM 89531P105 7,529 126,830 SH   OTR 1 126,830 0 0
TUTOR PERINI CORP NOTE 2.875% 6/1 901109AD0 5,532 6,010,000 PRN   OTR 1 6,010,000 0 0
TWITTER INC NOTE 0.250% 9/1 90184LAB8 66,985 69,042,000 PRN   OTR 1 69,042,000 0 0
UNION PAC CORP COM 907818108 426 3,084 SH   OTR 1 0 0 0
UNION PAC CORP COM 907818108 829 6,000 SH   SOLE   6,000 0 0
UNISYS CORP NOTE 5.500% 3/0 909214BS6 19,393 13,916,000 PRN   OTR 1 13,916,000 0 0
US FOODS HLDG CORP COM 912008109 21,294 673,015 SH   OTR 1 673,015 0 0
US FOODS HLDG CORP COM 912008109 10,756 339,953 SH   OTR   339,953 0 0
VICI PPTYS INC COM 925652109 4,860 258,775 SH   OTR   258,775 0 0
VICI PPTYS INC COM 925652109 6,246 332,590 SH   OTR 1 332,590 0 0
VISA INC COM CL A 92826C839 7,040 53,360 SH   OTR   53,360 0 0
VISA INC COM CL A 92826C839 13,592 103,015 SH   OTR 1 102,615 0 0
W R BERKLEY CORPORATION COM 084423102 185 2,497 SH   OTR 1 2,497 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 857 12,542 SH   OTR 1 2,134 0 0
WASTE CONNECTIONS INC COM 94106B101 7,930 106,800 SH   OTR   106,800 0 0
WASTE CONNECTIONS INC COM 94106B101 14,262 192,075 SH   OTR 1 192,075 0 0
WELLS FARGO CO NEW COM 949746101 498 10,807 SH   OTR 1 9,755 0 0