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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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
ALPHABET INC	CAP STK CL A	02079K305	1,025	973	SH		SOLE		973	0	0
ANDINA ACQUISITION CORP II	SHS	G0441P104	1,485	144,186	SH		SOLE		144,186	0	0
AVISTA HEALTHCARE PUB ACQ CO	CL A	G0726L125	6,465	651,732	SH		SOLE		651,732	0	0
AXALTA COATING SYS LTD	COM	G0750C108	786	24,300	SH	Call	SOLE		24,300	0	0
BANK AMER CORP	COM	060505104	1,057	35,800	SH		SOLE		35,800	0	0
BANK AMER CORP	COM	060505104	1,057	35,800	SH	Put	SOLE		35,800	0	0
BIG ROCK PARTNERS ACQUISI CO	*W EXP 12/01/202	089482111	15	36,393	SH		SOLE		36,393	0	0
BIG ROCK PARTNERS ACQUISI CO	COM	089482103	1,682	168,240	SH		SOLE		168,240	0	0
BISON CAP ACQUISITION CORP	ORD SHS	G1142P104	1,437	145,573	SH		SOLE		145,573	0	0
BLACK RIDGE ACQUISITION CORP	*W EXP 07/10/202	09216T115	13	38,820	SH		SOLE		38,820	0	0
BLACK RIDGE ACQUISITION CORP	COM	09216T107	5,531	572,595	SH		SOLE		572,595	0	0
CAPITOL INVT CORP IV	CL A ORD	G18920101	6,113	630,824	SH		SOLE		630,824	0	0
CNA FINL CORP	COM	126117100	284	5,353	SH		SOLE		5,353	0	0
CONSTELLATION ALPHA CAP CORP	*W EXP 03/23/202	G2379F116	29	121,123	SH		SOLE		121,123	0	0
CONSTELLATION ALPHA CAP CORP	SHS	G2379F108	3,532	363,337	SH		SOLE		363,337	0	0
DISCOVERY COMMUNICATNS NEW	COM SER C	25470F302	2,369	111,906	SH		SOLE		111,906	0	0
DRAPER OAKWOOD TECHNOLOGY	COM CL A	26146L103	2,845	291,148	SH		SOLE		291,148	0	0
EASTERLY ACQUISITION CORP	COM	27616L102	4,058	401,734	SH		SOLE		401,734	0	0
ELECTRUM SPL ACQUISITION COR	SHS	G3105C104	11,674	1,131,190	SH		SOLE		1,131,190	0	0
ENZYMOTEC LTD	SHS	M4059L101	3,264	275,475	SH		SOLE		275,475	0	0
FEDERAL STR ACQUISITION CORP	CL A	31421V107	11,745	1,209,437	SH		SOLE		1,209,437	0	0
FINTECH ACQUISITION CORP II	COM	31810G109	5,767	581,340	SH		SOLE		581,340	0	0
FORUM MERGER CORP	COM CL A	34985B103	3,070	307,648	SH		SOLE		307,648	0	0
GIGCAPITAL INC	UNIT 03/06/2025	37518N205	3,639	363,936	SH		SOLE		363,936	0	0
GLOBAL PARTNER ACQUISITION C	COM	37954X105	4,085	406,445	SH		SOLE		406,445	0	0
GORES HLDGS II INC	COM CL A	382867109	8,537	858,892	SH		SOLE		858,892	0	0
GTY TECHNOLOGY HOLDINGS INC	CL A	G4182A102	6,936	698,467	SH		SOLE		698,467	0	0
HAYMAKER ACQUISITION CORP	*W EXP 10/27/202	420870115	139	173,903	SH		SOLE		173,903	0	0
HAYMAKER ACQUISITION CORP	COM CLASS A	420870107	4,149	436,726	SH		SOLE		436,726	0	0
HENNESSY CAP ACQUSTON CORP I	COM	42588L105	10,220	1,042,831	SH		SOLE		1,042,831	0	0
HSN INC	COM	404303109	5,629	139,692	SH		SOLE		139,692	0	0
HUNTER MARITIME ACQUISITION	*W EXP 99/99/999	Y37828129	27	89,858	SH		SOLE		89,858	0	0
HUNTER MARITIME ACQUISITION	CL A	Y37828111	1,754	179,716	SH		SOLE		179,716	0	0
I AM CAP ACQUISITION CO	COM	45074Q108	2,485	252,330	SH		SOLE		252,330	0	0
INDUSTREA ACQUISITION CORP	CL A	45579J104	5,518	567,665	SH		SOLE		567,665	0	0
INTEL CORP	COM	458140100	11,231	243,300	SH		SOLE		243,300	0	0
INTEL CORP	COM	458140100	11,231	243,300	SH	Put	SOLE		243,300	0	0
IXYS CORP	COM	46600W106	10,118	422,469	SH		SOLE		422,469	0	0
JOHNSON & JOHNSON	COM	478160104	54,379	389,200	SH		SOLE		389,200	0	0
JOHNSON & JOHNSON	COM	478160104	54,379	389,200	SH	Put	SOLE		389,200	0	0
KAYNE ANDERSON ACQUISITION	COM CL A	48661U102	10,973	1,130,067	SH		SOLE		1,130,067	0	0
KBL MERGER CORP IV	*W EXP 01/15/202	48242A112	26	145,346	SH		SOLE		145,346	0	0
KBL MERGER CORP IV	COM	48242A104	2,352	242,244	SH		SOLE		242,244	0	0
LANDCADIA HLDGS INC	CL A	51476W107	7,056	709,857	SH		SOLE		709,857	0	0
LEGACY ACQUISITION CORP	UNIT 05/31/2024	524643202	5,788	582,300	SH		SOLE		582,300	0	0
LEISURE ACQUISITION CORP	UNIT 99/99/9999	52539T206	3,843	388,200	SH		SOLE		388,200	0	0
LIBERTY GLOBAL PLC	SHS CL C	G5480U120	5,763	170,296	SH		SOLE		170,296	0	0
M I ACQUISITIONS INC	COM	55304A104	1,933	189,735	SH		SOLE		189,735	0	0
M III ACQUISITION CORP	COM	55378T104	9,038	911,229	SH		SOLE		911,229	0	0
MATLIN & PARTNERS ACQUISITIO	CL A	57682V106	14,955	1,532,233	SH		SOLE		1,532,233	0	0
MODERN MEDIA ACQUISITION	COM	60765P103	9,705	988,277	SH		SOLE		988,277	0	0
MOSAIC ACQUISITION CORP	UNIT 99/99/9999	G62848117	245	24,262	SH		SOLE		24,262	0	0
NATIONAL ENERGY SERVICES REU	SHS	G6375R107	4,338	436,005	SH		SOLE		436,005	0	0
ORIGO ACQUISITION CORP	SHS	G67789126	272	25,555	SH		SOLE		25,555	0	0
OSPREY ENERGY ACQUISITION CO	*W EXP 07/21/202	688397116	31	43,693	SH		SOLE		43,693	0	0
OSPREY ENERGY ACQUISITION CO	CL A COM	688397108	7,453	776,397	SH		SOLE		776,397	0	0
PENSARE ACQUISITION CORP	COM	70957E105	17,766	1,839,141	SH		SOLE		1,839,141	0	0
POTLATCH CORP NEW	COM	737630103	874	17,516	SH		SOLE		17,516	0	0
REGALWOOD GLOBAL ENERGY LTD	UNIT 99/99/9999	G74760110	8,611	865,470	SH		SOLE		865,470	0	0
SABAN CAP ACQUISITION CORP	COM CL A	78516C106	2,891	291,150	SH		SOLE		291,150	0	0
SENTINEL ENERGY SVCS INC	UNIT 11/02/2022	G8062D128	97	9,706	SH		SOLE		9,706	0	0
SILVER RUN ACQUISITION	COM CL A	82812A103	17,191	1,734,669	SH		SOLE		1,734,669	0	0
SILVER SPRING NETWORKS INC	COM	82817Q103	1,473	90,700	SH		SOLE		90,700	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	*W EXP 99/99/999	G8250R129	85	48,447	SH		SOLE		48,447	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	CL A	G8250R103	2,566	254,355	SH		SOLE		254,355	0	0
SPDR S&P 500 ETF TR	TR UNIT	78462F103	25,965	97,300	SH		SOLE		97,300	0	0
SPDR S&P 500 ETF TR	TR UNIT	78462F103	25,965	97,300	SH	Put	SOLE		97,300	0	0
STELLAR ACQUISITION III INC	*W EXP 03/22/202	Y8172W115	29	92,545	SH		SOLE		92,545	0	0
STELLAR ACQUISITION III INC	COM	Y8172W107	983	96,300	SH		SOLE		96,300	0	0
TIME INC NEW	COM	887228104	1,051	56,968	SH		SOLE		56,968	0	0
TPG PACE ENERGY HLDGS CORP	CL A	872656103	10,455	1,073,365	SH		SOLE		1,073,365	0	0
TPG PACE HLDGS CORP	CL A	G89827128	5,791	595,145	SH		SOLE		595,145	0	0
UNILEVER PLC	SPON ADR NEW	904767704	2,676	48,355	SH		SOLE		48,355	0	0
VANTAGE ENERGY ACQUISITION	COM CL A	92211L105	9,332	960,051	SH		SOLE		960,051	0	0
WASHINGTONFIRST BANKSHARES I	COM	940730104	3,107	90,696	SH		SOLE		90,696	0	0
WELLS FARGO CO NEW	COM	949746101	29,522	486,600	SH		SOLE		486,600	0	0
WELLS FARGO CO NEW	COM	949746101	29,522	486,600	SH	Put	SOLE		486,600	0	0
XENITH BANKSHARES INC NEW	COM NEW	984102202	8,461	250,084	SH		SOLE		250,084	0	0
XPO LOGISTICS INC	COM	983793100	449	4,900	SH		SOLE		4,900	0	0
AGRIUM INC	COM	008916108	22,540	196,000	SH		SOLE		196,000	0	0
COBALT INTERNATIONAL ENERGY INC	COM	19075F304	17	18,360	SH		SOLE		18,360	0	0
HEALTHEQUITY INC	COM	42226A107	298,837	6,404,562	SH		SOLE		6,404,562	0	0