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
ANDINA ACQUISITION CORP II	*W EXP 11/23/202	G0441P138	16	86,544	SH		SOLE		16	0	0
ANDINA ACQUISITION CORP II	RIGHT 09/01/2017	G0441P120	27	94,718	SH		SOLE		27	0	0
ANDINA ACQUISITION CORP II	SHS	G0441P104	951	96,160	SH		SOLE		951	0	0
APIGEE CORP	COM	03765N108	837	48,088	SH		SOLE		837	0	0
AR CAP ACQUISITION CORP	COM	00191R109	14,108	1,417,879	SH		SOLE		14,108	0	0
AROWANA INC	*W EXP 04/29/202	G05011112	13	178,606	SH		SOLE		13	0	0
AROWANA INC	RIGHT 01/01/2017	G05011120	27	181,262	SH		SOLE		27	0	0
AROWANA INC	SHS	G05011104	2,717	266,654	SH		SOLE		2,717	0	0
ATLANTIC ALLIANCE PARTNER CO	SHS	G04897107	4,249	404,700	SH		SOLE		4,249	0	0
BARINGTON HILCO ACQUISITION	COM	06759V101	1,653	163,642	SH		SOLE		1,653	0	0
BOULEVARD ACQUISITION	CL A	10157Q102	16,348	1,660,232	SH		SOLE		16,348	0	0
CAPITOL ACQUISITION CORP III	COM	14055M106	12,566	1,275,742	SH		SOLE		12,566	0	0
CEPHEID	COM	15670R107	6,443	122,285	SH		SOLE		6,443	0	0
CEPHEID	COM	15670R107	838	15,900	SH	Put	SOLE		838	0	0
CEPHEID	COM	15670R107	16	3,200	SH	Call	SOLE		16	0	0
CF CORP	SHS CL A	G20307107	1,491	152,346	SH		SOLE		1,491	0	0
COBALT INTERNATIONAL ENERGY INC	COM	19075F106	341	275,000	SH		SOLE		341	0	0
CYNAPSUS THERAPEUTICS INC	COM PAR NO PAR	23257Y859	2,712	67,410	SH		SOLE		2,712	0	0
CYNAPSUS THERAPEUTICS INC	COM PAR NO PAR	23257Y859	2,836	70,500	SH	Put	SOLE		2,836	0	0
CYNAPSUS THERAPEUTICS INC	COM PAR NO PAR	23257Y859	591	14,700	SH	Call	SOLE		591	0	0
DISCOVERY COMMUNICATNS NEW	COM SER A	25470F104	518	19,260	SH		SOLE		518	0	0
DOUBLE EAGLE ACQUISITION COR	*W EXP 09/16/202	G28195116	99	248,585	SH		SOLE		99	0	0
DOUBLE EAGLE ACQUISITION COR	COM	G28195124	17,379	1,755,426	SH		SOLE		17,379	0	0
EASTERLY ACQUISITION CORP	COM	27616L102	6,377	641,588	SH		SOLE		6,377	0	0
ELECTRUM SPL ACQUISITION COR	SHS	G3105C104	6,315	641,867	SH		SOLE		6,315	0	0
EPIQ SYS INC	COM	26882D109	750	45,452	SH		SOLE		750	0	0
GLOBAL PARTNER ACQUISITION C	COM	37954X105	3,011	306,596	SH		SOLE		3,011	0	0
GORES HLDGS INC	CL A	382866101	519	48,028	SH		SOLE		519	0	0
GP INVTS ACQUISITION COR	SHS	G40357124	2,762	281,851	SH		SOLE		2,762	0	0
HARMONY MERGER CORP	COM	413247107	6,965	693,072	SH		SOLE		6,965	0	0
HEALTHEQUITY INC	COM	42226A107	453,027	11,969,000	SH		SOLE		453,027	0	0
HENNESSY CAP ACQUISITION COR	COM	42588J100	11,493	1,172,750	SH		SOLE		11,493	0	0
HYDRA INDS ACQUISITION CORP	COM	448740100	4,406	442,336	SH		SOLE		4,406	0	0
HYDRA INDS ACQUISITION CORP	RIGHT 99/99/9999	448740126	19	43,312	SH		SOLE		19	0	0
INCONTACT INC	COM	45336E109	6,172	441,481	SH		SOLE		6,172	0	0
INTERACTIVE INTELLIGENCE GRO	NOTE 1.250% 6/1/2020	45841VAB5	8,882	7,704,000	PRN		SOLE		8,882	0	0
ITC HLDGS CORP	COM	465685105	4,476	96,300	SH		SOLE		4,476	0	0
KLA-TENCOR CORP	COM	482480100	2,314	33,200	SH	Call	SOLE		2,314	0	0
KLR ENERGY ACQUISITION CORP	CL A	49877M108	2,338	231,024	SH		SOLE		2,338	0	0
LANDCADIA HLDGS INC	UNIT 12/31/2021T	51476W206	2,949	287,744	SH		SOLE		2,949	0	0
LIBERTY GLOBAL PLC	SHS CL C	G5480U120	2,230	67,507	SH		SOLE		2,230	0	0
LOEWS CORP	COM	540424108	2,259	54,891	SH		SOLE		2,259	0	0
M I ACQUISITIONS INC	UNIT 99/99/9999	55304A203	1,447	144,450	SH		SOLE		1,447	0	0
M III ACQUISITION CORP	UNIT 99/99/9999T	55378T203	2,123	216,675	SH		SOLE		2,123	0	0
NATIONAL INTERSTATE CORP	COM	63654U100	4,892	150,380	SH		SOLE		4,892	0	0
NETSUITE INC	NOTE 0.250% 6/1/2018	64118QAB3	35,061	31,780,000	PRN		SOLE		35,061	0	0
PACE HLDGS CORP	*W EXP 99/99/999	G6865N111	112	266,597	SH		SOLE		112	0	0
PACE HLDGS CORP	CL A	G6865N103	5,368	545,567	SH		SOLE		5,368	0	0
POTASH CORP. OF SASKATCHEWAN INC.	COM	73755L107	17,772	1,089,000	SH		SOLE		17,772	0	0
QUINPARIO ACQUISITION CORP 2	*W EXP 01/01/202	74874U119	71	405,122	SH		SOLE		71	0	0
QUINPARIO ACQUISITION CORP 2	COM	74874U101	19,760	1,993,930	SH		SOLE		19,760	0	0
RAPTOR PHARMACEUTICAL CORP	COM	75382F106	951	106,026	SH		SOLE		951	0	0
RAPTOR PHARMACEUTICAL CORP	COM	75382F106	936	104,300	SH	Call	SOLE		936	0	0
RITE AID CORP	COM	767754104	918	119,400	SH	Call	SOLE		918	0	0
SABAN CAP ACQUISITION CORP	UNIT 99/99/9999	78516C205	971	96,300	SH		SOLE		971	0	0
STELLAR ACQUISITION III INC	UNIT 03/22/2022	Y8172W123	960	96,300	SH		SOLE		960	0	0
TERRAPIN 3 ACQUISITION CORP	COM CL A	88104P104	638	64,199	SH		SOLE		638	0	0
TWENTY FIRST CENTY FOX INC	CL A	90130A101	703	29,010	SH		SOLE		703	0	0
VITAE PHARMACEUTICALS INC	COM	92847N103	483	23,071	SH		SOLE		483	0	0
VITAE PHARMACEUTICALS INC	COM	92847N103	82	3,900	SH	Put	SOLE		82	0	0
W.R. BERKLEY CORP.	COM	084423102	31,710	549,000	SH		SOLE		31,710	0	0