W. R. Berkley (WRB) 13F-HR Quarterly holdings report by institutional manager

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

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OMB Number:		3235-0006
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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
ALTA MESA RES INC	CL A	02133L109	2,697	396,028	SH		SOLE		396,028	0	0
AVISTA HEALTHCARE PUB ACQ CO	CL A	G0726L125	9,027	899,997	SH		SOLE		899,997	0	0
BIG ROCK PARTNERS ACQUISI CO	COM	089482103	2,009	202,748	SH		SOLE		202,748	0	0
BISON CAP ACQUISITION CORP	ORD SHS	G1142P104	1,459	145,573	SH		SOLE		145,573	0	0
BLACK RIDGE ACQUISITION CORP	COM	09216T107	5,594	572,595	SH		SOLE		572,595	0	0
BLACKHAWK NETWORK HLDGS INC	NOTE 1.500% 1/1	09238EAB0	35,455	31,745,000	PRN		SOLE		31,745,000	0	0
BOARDWALK PIPELINE PARTNERS	UT LTD PARTNER	096627104	122	10,493	SH		SOLE		10,493	0	0
CAPITOL INVT CORP IV	CL A ORD	G18920101	6,214	630,824	SH		SOLE		630,824	0	0
CNA FINL CORP	COM	126117100	1,062	23,257	SH		SOLE		23,257	0	0
CONSTELLATION ALPHA CAP CORP	*W EXP 03/23/202	G2379F116	22	60,077	SH		SOLE		60,077	0	0
CONSTELLATION ALPHA CAP CORP	SHS	G2379F108	4,242	425,910	SH		SOLE		425,910	0	0
DISCOVERY COMMUNICATNS NEW	COM SER C	25470F302	3,113	122,097	SH		SOLE		122,097	0	0
DR PEPPER SNAPPLE GROUP INC	COM	26138E109	2,979	24,419	SH		SOLE		24,419	0	0
DRAPER OAKWOOD TECHNOLOGY	COM CL A	26146L103	2,906	291,148	SH		SOLE		291,148	0	0
EASTERLY ACQUISITION CORP	COM	27616L102	9,890	960,218	SH		SOLE		960,218	0	0
FEDERAL STR ACQUISITION CORP	CL A	31421V107	11,877	1,209,437	SH		SOLE		1,209,437	0	0
FINANCIAL ENGINES INC	COM	317485100	4,592	102,280	SH		SOLE		102,280	0	0
FINTECH ACQUISITION CORP II	COM	31810G109	9,228	922,786	SH		SOLE		922,786	0	0
FOUNDATION MEDICINE INC	COM	350465100	13,340	97,584	SH		SOLE		97,584	0	0
GIGCAPITAL INC	COM	37518N106	8,467	860,464	SH		SOLE		860,464	0	0
GORDON POINTE ACQUISITION CO	*W EXP 07/30/202	382788115	5	9,731	SH		SOLE		9,731	0	0
GORDON POINTE ACQUISITION CO	COM CLASS A	382788107	2,175	223,814	SH		SOLE		223,814	0	0
GORES HLDGS II INC	COM CL A	382867109	6,751	664,792	SH		SOLE		664,792	0	0
GTY TECHNOLOGY HOLDINGS INC	CL A	G4182A102	7,027	698,467	SH		SOLE		698,467	0	0
HAYMAKER ACQUISITION CORP	COM CLASS A	420870107	4,241	436,726	SH		SOLE		436,726	0	0
HENNESSY CAP ACQUSTON CORP I	COM	42588L105	15,228	1,501,765	SH		SOLE		1,501,765	0	0
HUNTER MARITIME ACQUISITION	*W EXP 99/99/999	Y37828129	29	89,858	SH		SOLE		89,858	0	0
HUNTER MARITIME ACQUISITION	CL A	Y37828111	1,776	179,716	SH		SOLE		179,716	0	0
I AM CAP ACQUISITION CO	COM	45074Q108	2,728	252,330	SH		SOLE		252,330	0	0
INDUSTREA ACQUISITION CORP	CL A	45579J104	7,276	737,961	SH		SOLE		737,961	0	0
INFINITY PPTY & CAS CORP	COM	45665Q103	4,294	30,163	SH		SOLE		30,163	0	0
KAYNE ANDERSON ACQUISITION	COM CL A	48661U102	11,188	1,130,067	SH		SOLE		1,130,067	0	0
KBL MERGER CORP IV	*W EXP 01/15/202	48242A112	42	145,346	SH		SOLE		145,346	0	0
KBL MERGER CORP IV	COM	48242A104	6,117	615,384	SH		SOLE		615,384	0	0
LANDCADIA HLDGS INC	CL A	51476W107	6,167	608,775	SH		SOLE		608,775	0	0
LEGACY ACQUISITION CORP	COM CL A	524643103	5,602	582,300	SH		SOLE		582,300	0	0
LEISURE ACQUISITION CORP	COM	52539T107	3,750	388,200	SH		SOLE		388,200	0	0
MATLIN & PARTNERS ACQUISITIO	CL A	57682V106	15,138	1,532,233	SH		SOLE		1,532,233	0	0
MODERN MEDIA ACQUISITION	COM	60765P103	10,610	1,063,137	SH		SOLE		1,063,137	0	0
MOSAIC ACQUISITION CORP	UNIT 99/99/9999	G62848117	243	24,262	SH		SOLE		24,262	0	0
MTECH ACQUISITION CORP	COM CLASS A	55378W107	480	49,140	SH		SOLE		49,140	0	0
MUDRICK CAP ACQUISITION CORP	COM CLASS A	624745105	3,756	390,000	SH		SOLE		390,000	0	0
NXP SEMICONDUCTORS N V	COM	N6596X109	747	6,838	SH		SOLE		6,838	0	0
NXP SEMICONDUCTORS N V	COM	N6596X109	10,840	99,200	SH	Call	SOLE		99,200	0	0
ONE MADISON CORP	COM CL A	G6772P100	3,065	316,258	SH		SOLE		316,258	0	0
OPES ACQUISITION CORP	*W EXP 01/15/202	68373P118	48	146,250	SH		SOLE		146,250	0	0
OPES ACQUISITION CORP	COM	68373P100	1,420	146,250	SH		SOLE		146,250	0	0
OSPREY ENERGY ACQUISITION CO	CL A COM	688397108	8,095	797,579	SH		SOLE		797,579	0	0
PENSARE ACQUISITION CORP	COM	70957E105	18,189	1,839,141	SH		SOLE		1,839,141	0	0
PLATINUM EAGLE ACQUISITIN CO	*W EXP 01/17/202	G7126L118	68	48,655	SH		SOLE		48,655	0	0
PLATINUM EAGLE ACQUISITIN CO	SHS CL A	G7126L100	1,419	145,965	SH		SOLE		145,965	0	0
REGALWOOD GLOBAL ENERGY LTD	COM CL A	G74760102	8,447	865,470	SH		SOLE		865,470	0	0
RSP PERMIAN INC	COM	74978Q105	2,403	54,585	SH		SOLE		54,585	0	0
SABAN CAP ACQUISITION CORP	COM CL A	78516C106	2,935	291,150	SH		SOLE		291,150	0	0
SENTINEL ENERGY SVCS INC	UNIT 11/02/2022	G8062D128	98	9,706	SH		SOLE		9,706	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	*W EXP 09/14/202	G8250R129	44	24,224	SH		SOLE		24,224	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	CL A	G8250R103	14,093	1,402,333	SH		SOLE		1,402,333	0	0
STELLAR ACQUISITION III INC	*W EXP 03/22/202	Y8172W115	23	86,574	SH		SOLE		86,574	0	0
STELLAR ACQUISITION III INC	COM	Y8172W107	1,000	96,300	SH		SOLE		96,300	0	0
TPG PACE HLDGS CORP	CL A	G89827128	5,910	595,145	SH		SOLE		595,145	0	0
TWENTY FIRST CENTY FOX INC	CL B	90130A200	3,609	73,257	SH		SOLE		73,257	0	0
U S G CORP	COM NEW	903293405	4,212	97,678	SH		SOLE		97,678	0	0
UNION ACQUISITION CORP	RIGHT 12/02/2019	G9366W135	29	97,500	SH		SOLE		97,500	0	0
UNION ACQUISITION CORP	SHS	G9366W101	2,362	243,750	SH		SOLE		243,750	0	0
UNITED TECHNOLOGIES CORP	COM	913017109	2,801	22,400	SH	Put	SOLE		22,400	0	0
VANTAGE ENERGY ACQUISITION	COM CL A	92211L105	9,466	960,051	SH		SOLE		960,051	0	0
HEALTHEQUITY INC	COM	42226A107	173,240	2,306,791	SH		SOLE		2,306,791	0	0
EXXON MOBIL CORP	COM	30231G102	25,535	308,650	SH		SOLE		308,650	0	0
NUTRIEN LTD	COM	67077M108	23,768	437,080	SH		SOLE		437,080	0	0
VISTA OUTDOOR INC	COM	928377100	23,255	1,501,276	SH		SOLE		1,501,276	0	0
VERIZON COMMUNICATIONS INC	COM	92343V104	15,866	315,365	SH		SOLE		315,365	0	0