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
ACT II GLOBAL ACQUISITION CO	CL A SHS	G0080J104	1,955	198,440	SH		SOLE		198,440	0	0
ALBERTON ACQUISITION CORP	*W EXP 04/26/202	G35006124	22	198,484	SH		SOLE		198,484	0	0
ALBERTON ACQUISITION CORP	ORD SHS	G35006108	2,034	198,484	SH		SOLE		198,484	0	0
ALBERTON ACQUISITION CORP	RIGHT 10/04/2020	G35006132	58	198,484	SH		SOLE		198,484	0	0
ALLEGRO MERGER CORP	*W EXP 01/06/202	01749N111	27	122,433	SH		SOLE		122,433	0	0
ALLEGRO MERGER CORP	COM	01749N103	7,144	703,106	SH		SOLE		703,106	0	0
ALPHABET INC	CAP STK CL A	02079K305	11,480	9,401	SH		SOLE		9,401	0	0
AMCI ACQUISITION CORP	CLASS A	00165R101	9,562	953,299	SH		SOLE		953,299	0	0
ANDINA ACQUISITION CORP III	*W EXP 07/31/202	G04415124	15	73,324	SH		SOLE		73,324	0	0
ANDINA ACQUISITION CORP III	RIGHT 07/31/2020	G04415132	30	98,774	SH		SOLE		98,774	0	0
ANDINA ACQUISITION CORP III	SHS	G04415108	1,637	163,866	SH		SOLE		163,866	0	0
B RILEY PRINCIPAL MERGER COR	CL A	05586Y106	1,967	198,440	SH		SOLE		198,440	0	0
BOXWOOD MERGER CORP	COM CL A	10319T101	999	99,149	SH		SOLE		99,149	0	0
CALLON PETE CO DEL	COM	13123X102	332	76,500	SH	Call	SOLE		76,500	0	0
CHASERG TECHNLGY ACQUISITN C	CLASS A	16166A103	8,567	847,421	SH		SOLE		847,421	0	0
CHURCHILL CAP CORP II	UNIT 99/99/9999	17143G205	313	29,766	SH		SOLE		29,766	0	0
COLLIER CREEK HOLDINGS	COM CL A	G22707106	2,642	259,263	SH		SOLE		259,263	0	0
CONYERS PK II ACQUISITION CO	UNIT 99/99/9999	212896203	106	9,915	SH		SOLE		9,915	0	0
CRESCENT ACQUISITION CORP	COM CL A	22564L105	3,438	347,270	SH		SOLE		347,270	0	0
DD3 ACQUISITION CORP	SHS	G2692M103	353	34,735	SH		SOLE		34,735	0	0
DFB HEALTHCARE ACQUISTION CO	COM	23291E109	6,906	678,357	SH		SOLE		678,357	0	0
DIAMOND EAGLE ACQUISITION CO	UNIT 06/30/2026	25258L208	1,010	99,220	SH		SOLE		99,220	0	0
DISCOVERY INC	COM SER C	25470F302	2,273	92,320	SH		SOLE		92,320	0	0
EDTECHX HLDGS ACQUISITION CO	COM	28138X103	672	66,178	SH		SOLE		66,178	0	0
FAR PT ACQUISITION CORP	COM CL A	30734W109	6,567	642,593	SH		SOLE		642,593	0	0
FELLAZO INC	UNIT 99/99/9999	G3362K104	889	89,235	SH		SOLE		89,235	0	0
FORUM MERGER II CORP	CL A	34986F103	7,954	786,795	SH		SOLE		786,795	0	0
FOX CORP	CL A COM	35137L105	2,437	77,294	SH		SOLE		77,294	0	0
GIGCAPITAL INC	COM	37518N106	5,637	541,987	SH		SOLE		541,987	0	0
GIGCAPITAL2 INC	UNIT 02/28/2026	375036209	2,555	248,050	SH		SOLE		248,050	0	0
GORDON POINTE ACQUISITION CO	COM CLASS A	382788107	5,702	544,597	SH		SOLE		544,597	0	0
GORES HOLDINGS III INC	CLASS A	38286G109	1,003	99,240	SH		SOLE		99,240	0	0
GORES METROPOULOS INC	COM CL A	382872109	992	99,219	SH		SOLE		99,219	0	0
GRAF INDL CORP	COM	384278107	13,334	1,322,661	SH		SOLE		1,322,661	0	0
GREENLAND ACQUISITIN CORPORA	SHS	G40981139	916	88,470	SH		SOLE		88,470	0	0
GS ACQUISITION HLDGS CORP	COM CL A	36255F102	3,526	345,712	SH		SOLE		345,712	0	0
GX ACQUISITION CORP	*W EXP 05/24/202	36251A115	17	27,732	SH		SOLE		27,732	0	0
GX ACQUISITION CORP	COM CL A	36251A107	3,949	396,880	SH		SOLE		396,880	0	0
HAYMAKER ACQUISITION CORP II	COM CL A	42087L101	1,965	198,438	SH		SOLE		198,438	0	0
HENNESSY CAP ACQUSTION CORP	CL A COM	42589C104	3,969	396,880	SH		SOLE		396,880	0	0
KBL MERGER CORP IV	*W EXP 01/15/202	48242A112	13	143,476	SH		SOLE		143,476	0	0
LANDCADIA HLDGS II INC	CL A	51476X105	2,908	297,660	SH		SOLE		297,660	0	0
LEGACY ACQUISITION CORP	COM CL A	524643103	13,439	1,317,543	SH		SOLE		1,317,543	0	0
LEISURE ACQUISITION CORP	COM	52539T107	12,173	1,188,777	SH		SOLE		1,188,777	0	0
LEO HOLDINGS CORP	COM CL A	G5463L105	9,648	942,142	SH		SOLE		942,142	0	0
LF CAP ACQUISITION CORP	CL A	50200K108	3,199	311,779	SH		SOLE		311,779	0	0
LIBERTY GLOBAL PLC	SHS CL C	G5480U120	3,021	126,966	SH		SOLE		126,966	0	0
MEGALITH FINL ACQUISITION CO	*W EXP 08/26/202	58518F117	58	153,761	SH		SOLE		153,761	0	0
MEGALITH FINL ACQUISITION CO	CL A COM	58518F109	7,659	753,871	SH		SOLE		753,871	0	0
MONOCLE ACQUISITION CORP	COM	609754106	988	99,220	SH		SOLE		99,220	0	0
MOSAIC ACQUISITION CORP	COM CL A	61946M100	13,997	1,355,021	SH		SOLE		1,355,021	0	0
MUDRICK CAP ACQUISITION CORP	COM CLASS A	624745105	9,555	929,384	SH		SOLE		929,384	0	0
NEBULA ACQUISITION CORP	COM CLASS A	629076100	12,859	1,260,697	SH		SOLE		1,260,697	0	0
NETFIN ACQUISITION CORP	*W EXP 08/01/202	G6455A115	74	247,480	SH		SOLE		247,480	0	0
NETFIN ACQUISITION CORP	SHS CL A	G6455A107	3,387	347,025	SH		SOLE		347,025	0	0
NEW FRONTIER CORP	COM CL A	G6485P108	1,608	158,136	SH		SOLE		158,136	0	0
OAKTREE ACQUISITION CORP	UNIT 99/99/9999	G67145121	756	74,362	SH		SOLE		74,362	0	0
OPES ACQUISITION CORP	*W EXP 03/13/202	68373P118	17	94,742	SH		SOLE		94,742	0	0
OPES ACQUISITION CORP	COM	68373P100	6,543	631,276	SH		SOLE		631,276	0	0
OPES ACQUISITION CORP	UNIT 03/07/2023	68373P209	660	63,159	SH		SOLE		63,159	0	0
PIVOTAL ACQUISITION CORP	CL A COM	72583A101	354	34,727	SH		SOLE		34,727	0	0
PIVOTAL INVT CORP II	UNIT 06/01/2025	72582K209	1,009	99,151	SH		SOLE		99,151	0	0
PROFICIENT ALPHA ACQUSTN COR	*W EXP 04/30/202	74317H113	7	99,220	SH		SOLE		99,220	0	0
PROFICIENT ALPHA ACQUSTN COR	COM	74317H105	2,944	297,025	SH		SOLE		297,025	0	0
PROFICIENT ALPHA ACQUSTN COR	RIGHT 04/30/2026	74317H121	19	99,220	SH		SOLE		99,220	0	0
PURE ACQUISITION CORP	CL A	74621Q106	19,790	1,930,730	SH		SOLE		1,930,730	0	0
REGALWOOD GLOBAL ENERGY LTD	COM CL A	G74760102	13,707	1,328,183	SH		SOLE		1,328,183	0	0
RMG ACQUISITION CORP	*W EXP 02/21/202	749641114	34	45,241	SH		SOLE		45,241	0	0
RMG ACQUISITION CORP	CL A	749641106	2,911	297,660	SH		SOLE		297,660	0	0
SC HEALTH CORP	COM CL A	G78516203	730	74,362	SH		SOLE		74,362	0	0
SCHULTZE SPL PURP ACQUSTN CO	COM	80821R109	7,256	729,287	SH		SOLE		729,287	0	0
SENTINEL ENERGY SVCS INC	CL A	81728P105	16,218	1,577,674	SH		SOLE		1,577,674	0	0
SOCIAL CAP HEDOSOPHIA HLDGS	CL A	G8250R103	2,145	200,425	SH		SOLE		200,425	0	0
SPARTAN ENERGY ACQUISITON CO	CL A COM STK	846784106	12,055	1,193,570	SH		SOLE		1,193,570	0	0
THUNDER BRDG ACQUISTION II L	UNIT 99/99/9999	G8857S124	1,001	98,300	SH		SOLE		98,300	0	0
TKK SYMPHONY ACQUISITION COR	ORD SHS	G88950103	10,466	1,033,217	SH		SOLE		1,033,217	0	0
TOTTENHAM ACQUISITION I LTD	SHS	G8959N106	102	9,928	SH		SOLE		9,928	0	0
TPG PACE HLDGS CORP	CL A	G89827128	14,264	1,387,505	SH		SOLE		1,387,505	0	0
TRIDENT ACQUISITIONS CORP	COM	89615T106	13,086	1,255,881	SH		SOLE		1,255,881	0	0
TRINE ACQUISITION CORP	COM CL A	89628U108	1,959	198,440	SH		SOLE		198,440	0	0
TRINITY MERGER CORP	COM CL A	89653L106	17,278	1,655,012	SH		SOLE		1,655,012	0	0
TWELVE SEAS INVESTMENT COMPA	SHS	G9145A107	11,125	1,086,385	SH		SOLE		1,086,385	0	0
VECTOIQ ACQUISITION CORP	COM	92243N103	13,627	1,334,639	SH		SOLE		1,334,639	0	0
KRAFT HEINZ	COM	500754106	34,919	1,250,000	SH		SOLE		1,250,000	0	0
VISTA OUTDOOR INC	COM	928377100	12,388	2,001,286	SH		SOLE		2,001,286	0	0
EXXON MOBIL CORP	COM	30231G102	21,794	308,650	SH		SOLE		308,650	0	0
HEALTHEQUITY INC	COM	42226A107	1,531	26,794	SH		SOLE		26,794	0	0
NUTRIEN LTD	COM	67077M108	21,802	437,080	SH		SOLE		437,080	0	0
VERIZON COMMUNICATIONS INC	COM	92343V104	9,517	157,666	SH		SOLE		157,666	0	0
VISTEON CORP	COM	92839U206	22,024	266,827	SH		SOLE		266,827	0	0