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
ALTA MESA RES INC	CL A	02133L109	3,168	396,028	SH		SOLE		396,028	0	0
AVISTA HEALTHCARE PUB ACQ CO	CL A	G0726L125	6,459	651,732	SH		SOLE		651,732	0	0
BIG ROCK PARTNERS ACQUISI CO	COM	089482103	1,979	202,748	SH		SOLE		202,748	0	0
BISON CAP ACQUISITION CORP	ORD SHS	G1142P104	1,447	145,573	SH		SOLE		145,573	0	0
BLACK RIDGE ACQUISITION CORP	COM	09216T107	5,548	572,595	SH		SOLE		572,595	0	0
BLACKHAWK NETWORK HLDGS INC	COM	09238E104	2,628	58,793	SH		SOLE		58,793	0	0
BOARDWALK PIPELINE PARTNERS	UT LTD PARTNER	096627104	166	16,345	SH		SOLE		16,345	0	0
CALLIDUS SOFTWARE INC	COM	13123E500	12,579	349,910	SH		SOLE		349,910	0	0
CAPITOL INVT CORP IV	CL A ORD	G18920101	6,106	630,824	SH		SOLE		630,824	0	0
CLIFTON BANCORP INC	COM	186873105	1,038	66,302	SH		SOLE		66,302	0	0
CNA FINL CORP	COM	126117100	1,807	36,620	SH		SOLE		36,620	0	0
CONSTELLATION ALPHA CAP CORP	*W EXP 03/23/202	G2379F116	30	121,123	SH		SOLE		121,123	0	0
CONSTELLATION ALPHA CAP CORP	SHS	G2379F108	4,204	425,910	SH		SOLE		425,910	0	0
CSRA INC	COM	12650T104	23,636	573,278	SH		SOLE		573,278	0	0
DISCOVERY COMMUNICATNS NEW	COM SER C	25470F302	2,433	124,623	SH		SOLE		124,623	0	0
DRAPER OAKWOOD TECHNOLOGY	COM CL A	26146L103	2,871	291,148	SH		SOLE		291,148	0	0
DST SYS INC DEL	COM	233326107	15,755	188,333	SH		SOLE		188,333	0	0
EASTERLY ACQUISITION CORP	COM	27616L102	9,048	887,093	SH		SOLE		887,093	0	0
ELECTRUM SPL ACQUISITION COR	SHS	G3105C104	11,742	1,131,190	SH		SOLE		1,131,190	0	0
FEDERAL STR ACQUISITION CORP	CL A	31421V107	11,695	1,209,437	SH		SOLE		1,209,437	0	0
FINTECH ACQUISITION CORP II	COM	31810G109	8,186	823,544	SH		SOLE		823,544	0	0
GIGCAPITAL INC	COM	37518N106	5,427	559,532	SH		SOLE		559,532	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	2,173	223,814	SH		SOLE		223,814	0	0
GORES HLDGS II INC	COM CL A	382867109	7,133	713,317	SH		SOLE		713,317	0	0
GTY TECHNOLOGY HOLDINGS INC	CL A	G4182A102	6,922	698,467	SH		SOLE		698,467	0	0
HAYMAKER ACQUISITION CORP	COM CLASS A	420870107	4,171	436,726	SH		SOLE		436,726	0	0
HEALTHEQUITY INC	COM	42226A107	248,882	4,111,038	SH		SOLE		4,111,038	0	0
HENNESSY CAP ACQUSTON CORP I	COM	42588L105	12,963	1,309,354	SH		SOLE		1,309,354	0	0
HUNTER MARITIME ACQUISITION	*W EXP 99/99/999	Y37828129	40	89,858	SH		SOLE		89,858	0	0
HUNTER MARITIME ACQUISITION	CL A	Y37828111	1,758	179,716	SH		SOLE		179,716	0	0
I AM CAP ACQUISITION CO	COM	45074Q108	2,511	252,330	SH		SOLE		252,330	0	0
INDUSTREA ACQUISITION CORP	CL A	45579J104	5,569	567,665	SH		SOLE		567,665	0	0
KAYNE ANDERSON ACQUISITION	COM CL A	48661U102	11,063	1,130,067	SH		SOLE		1,130,067	0	0
KBL MERGER CORP IV	*W EXP 01/15/202	48242A112	35	145,346	SH		SOLE		145,346	0	0
KBL MERGER CORP IV	COM	48242A104	5,083	515,990	SH		SOLE		515,990	0	0
LANDCADIA HLDGS INC	CL A	51476W107	7,127	709,857	SH		SOLE		709,857	0	0
LEGACY ACQUISITION CORP	*W EXP 11/30/202	524643111	32	97,050	SH		SOLE		97,050	0	0
LEGACY ACQUISITION CORP	COM CL A	524643103	5,584	582,300	SH		SOLE		582,300	0	0
LEISURE ACQUISITION CORP	COM	52539T107	3,842	388,200	SH		SOLE		388,200	0	0
LIBERTY GLOBAL PLC	SHS CL A	G5480U104	2,045	65,325	SH		SOLE		65,325	0	0
M I ACQUISITIONS INC	COM	55304A104	1,981	189,735	SH		SOLE		189,735	0	0
MAINSOURCE FINANCIAL GP INC	COM	56062Y102	1,177	28,945	SH		SOLE		28,945	0	0
MATLIN & PARTNERS ACQUISITIO	CL A	57682V106	15,016	1,532,233	SH		SOLE		1,532,233	0	0
MODERN MEDIA ACQUISITION	COM	60765P103	10,578	1,063,137	SH		SOLE		1,063,137	0	0
MOSAIC ACQUISITION CORP	UNIT 99/99/9999	G62848117	245	24,262	SH		SOLE		24,262	0	0
MUDRICK CAP ACQUISITION CORP	COM CLASS A	624745105	3,725	390,000	SH		SOLE		390,000	0	0
MULESOFT INC	CL A	625207105	14,787	336,220	SH		SOLE		336,220	0	0
NATIONAL ENERGY SERVICES REU	SHS	G6375R107	4,330	436,500	SH		SOLE		436,500	0	0
NUTRIEN LTD	COM	67077M108	20,656	437,080	SH		SOLE		437,080	0	0
ONE MADISON CORP	*W EXP 99/99/999	G6772P126	89	97,310	SH		SOLE		97,310	0	0
ONE MADISON CORP	COM CL A	G6772P100	3,020	316,258	SH		SOLE		316,258	0	0
OPES ACQUISITION CORP	*W EXP 01/15/202	68373P118	56	146,250	SH		SOLE		146,250	0	0
OPES ACQUISITION CORP	COM	68373P100	1,417	146,250	SH		SOLE		146,250	0	0
OSPREY ENERGY ACQUISITION CO	*W EXP 07/21/202	688397116	20	27,969	SH		SOLE		27,969	0	0
OSPREY ENERGY ACQUISITION CO	CL A COM	688397108	7,469	776,397	SH		SOLE		776,397	0	0
PENSARE ACQUISITION CORP	COM	70957E105	17,876	1,839,141	SH		SOLE		1,839,141	0	0
PLATINUM EAGLE ACQUISITIN CO	UNIT 01/09/2023	G7126L126	1,482	145,965	SH		SOLE		145,965	0	0
REGALWOOD GLOBAL ENERGY LTD	*W EXP 12/05/202	G74760128	157	142,915	SH		SOLE		142,915	0	0
REGALWOOD GLOBAL ENERGY LTD	COM CL A	G74760102	8,395	865,470	SH		SOLE		865,470	0	0
SABAN CAP ACQUISITION CORP	COM CL A	78516C106	2,982	291,150	SH		SOLE		291,150	0	0
SENTINEL ENERGY SVCS INC	UNIT 11/02/2022	G8062D128	96	9,706	SH		SOLE		9,706	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	*W EXP 09/14/202	G8250R129	40	24,224	SH		SOLE		24,224	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	CL A	G8250R103	2,551	254,355	SH		SOLE		254,355	0	0
STELLAR ACQUISITION III INC	*W EXP 03/22/202	Y8172W115	42	91,582	SH		SOLE		91,582	0	0
STELLAR ACQUISITION III INC	COM	Y8172W107	997	96,300	SH		SOLE		96,300	0	0
STUDENT TRANSN INC	COM	86388A108	1,541	205,716	SH		SOLE		205,716	0	0
STUDENT TRANSN INC	COM	86388A108	7	1,000	SH	Put	SOLE		1,000	0	0
TERRA NITROGEN CO L P	COM UNIT	881005201	27,420	326,580	SH		SOLE		326,580	0	0
TPG PACE ENERGY HLDGS CORP	CL A	872656103	3,248	321,224	SH		SOLE		321,224	0	0
TPG PACE HLDGS CORP	CL A	G89827128	5,815	595,145	SH		SOLE		595,145	0	0
TWENTY FIRST CENTY FOX INC	CL A	90130A101	3,721	101,429	SH		SOLE		101,429	0	0
UNILEVER PLC	SPON ADR NEW	904767704	2,687	48,355	SH		SOLE		48,355	0	0
UNION ACQUISITION CORP	RIGHT 12/02/2019	G9366W135	33	97,500	SH		SOLE		97,500	0	0
UNION ACQUISITION CORP	SHS	G9366W101	2,335	243,750	SH		SOLE		243,750	0	0
UNITED TECHNOLOGIES CORP	COM	913017109	2,126	16,900	SH	Put	SOLE		16,900	0	0
VANTAGE ENERGY ACQUISITION	COM CL A	92211L105	9,389	960,051	SH		SOLE		960,051	0	0
VISTA OUTDOOR INC	COM	928377100	21,633	1,325,542	SH		SOLE		1,325,542	0	0