BERKLEY W R CORP

CIK

11544

Location

Greenwich, CT

Portfolio Value

Mid $2,098,280,715

Diversification

Diversified

Filing Date

Global Rank

#1,294 / 8,700 ▲ 306

Top Industry

Shell Companies 48.0%

3Y Alpha vs SPY

-10.2%

Period ended 2 months ago

Filed Aug 24, 2026 · 19d

26 quarters · since Mar 2020

Clone Performance

Sep 2023–Sep 2026 · vs SPY

Hypothetical growth of buying every stock this filer reported holding, rebalancing on each filing and indexed to the same start. Option positions cannot be bought this way and are left out.

Cloned portfolio

+32.9%

SPY

+72.6%

Annualised alpha

-10.1%

Max drawdown

−21.4%

Estimate. 13F holdings are quarter-lagged, so the clone rebalances about 45 days after each period end — when the filing becomes public — and it excludes option and short positions. Returns use comparable raw closes and exclude dividends. Returns are unavailable when a held security or benchmark crosses a captured split without a certified price basis; the requested window is not shortened to hide it. It tracks 86% of reported value on average across 13 quarters. Past performance does not predict future results.

Portfolio Concentration

259 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026

Top Position

12.0%

−3.3 pts

Top 5

32.5%

−4.4 pts

Top 10

45.2%

−1.2 pts

HHI

322

Diversified−99

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026

Sector	% Portfolio	Value	Positions
Financial Services	50.8%	$1,066,654,366	238
Energy	29.8%	$625,657,755	5
Technology	13.2%	$277,991,193	4
Consumer Cyclical	3.2%	$66,512,564	3
Healthcare	1.1%	$23,250,130	2
Unclassified	0.9%	$18,008,439	4
Real Estate	0.6%	$13,123,615	1
Communication Services	0.3%	$6,675,578	1
Industrials	0.0%	$407,075	1

Last Quarter's Activity

Export CSV

Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
FACT	FACT II Acquisition Corp.	+827,695	1,153,140	$12,257,878
CRAC	Crown Reserve Acquisition Corp. I	+740,671	1,217,433	$12,308,247
QSEA	Quartzsea Acquisition Corp	+688,641	1,094,190	$11,510,878
—		+638,649	3,265,181	$37,288,367
NPAC	New Providence Acquisition Corp. III/Cayman	+534,113	1,179,542	$12,244,825
PAA	Plains All American Pipeline LP	+500,000	3,184,307	$70,882,673
GTERA	Globa Terra Acquisition Corp	+498,843	1,561,028	$16,094,198
JACS	Jackson Acquisition Co II	+497,474	927,836	$9,872,175
DRDB	Roman DBDR Acquisition Corp. II	+475,757	2,276,587	$23,983,844
VLOS	Velos Acquisition I Corp.	+466,050	1,429,725	$15,483,921
—		+442,054	2,211,677	$22,846,623
SBXD	SilverBox Corp IV	+415,554	1,930,127	$20,864,672
SZZL	Sizzle Acquisition Corp. II	+386,613	873,645	$8,738,121
QUMS	Quantumsphere Acquisition Corp	+361,860	905,510	$9,007,928
LCCC	Lakeshore Acquisition III Corp.	+351,771	687,425	$7,156,094
TAVI	Tavia Acquisition Corp.	+331,470	548,331	$5,853,433
AEXA	American Exceptionalism Acquisition Corp. A	+326,620	747,779	$8,838,747
SDHI	Siddhi Acquisition Corp (Cayman Islands)	+321,730	920,198	$8,617,194
EGHA	EGH Acquisition Corp.	+302,332	409,369	$4,212,407
PCAP	ProCap Acquisition Corp	+272,445	700,182	$7,197,870
CEPO	Cantor Equity Partners I, Inc.	+222,210	1,444,647	$12,756,233
POLE	Andretti Acquisition Corp. II	+220,738	683,233	$7,344,754
HVII	Hennessy Capital Investment Corp. VII	+219,214	1,196,423	$11,510,392
TACH	Titan Acquisition Corp.	+217,428	778,984	$8,109,223
SSAC	SPACSphere Acquisition Corp.	+193,633	916,983	$7,674,450
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
—		−1,706,077	104,360	$1,136,480
CUB	Lionheart Holdings	−767,603	245,567	$2,140,817
PGAC	PANTAGES CAPITAL ACQUISITION Corp	−625,795	248,616	$2,642,788
TACO	Berto Acquisition Corp.	−596,599	1,225,999	$12,860,729
BSAA	BEST SPAC I Acquisition Corp.	−509,560	91,786	$0
GIX	GigCapital9 Corp.	−482,431	1,282,431	$8,762,539
KCHV	Kochav Defense Acquisition Corp.	−388,695	1,690,352	$17,528,950
GPAT	GP-Act III Acquisition Corp.	−349,759	497,064	$5,403,085
GIW	GigCapital8 Corp.	−338,411	1,289,470	$12,983,673
RFAM	RF Acquisition Corp III	−281,057	385,057	$3,297,264
BXBL	BOXABL Inc.	−254,784	61,244	$618,564
IRHO	Iron Horse Acquisition II Corp.	−247,850	247,850	$2,485,935
OYSE	Oyster Enterprises II Acquisition Corp	−228,022	475,872	$4,896,722
MLAA	Mountain Lake Acquisition Corp. II	−223,897	447,794	$4,446,594
MACI	Melar Acquisition Corp. I/Cayman	−203,047	795,916	$8,659,566
—		−179,255	49,282	$508,590
GPAC	General Purpose Acquisition Corp.	−160,162	518,564	$5,185,640
PTOR	Praetorian Acquisition Corp.	−155,174	905,746	$7,901,201
ALOV	Aldabra 4 Liquidity Opportunity Vehicle, Inc.	−148,716	446,445	$4,437,663
SPEG	Silver Pegasus Acquisition Corp.	−142,535	415,865	$4,270,933
KTWO	K2 Capital Acquisition Corp	−141,070	654,770	$5,938,956
CCAQ	Collective Acquisition Corp.	−126,645	683,778	$7,131,804
MUZE	Muzero Acquisition Corp	−124,350	248,700	$2,469,591
TVA	Texas Ventures Acquisition III Corp	−119,138	64,694	$682,521
EMIS	Emmis Acquisition Corp.	−108,216	399,090	$3,128,822
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
MSFT	Microsoft Corp	298,800	$111,458,376
NVDA	Nvidia Corp	249,600	$49,942,464
TSM	Taiwan Semiconductor Manufacturing Co Ltd	99,400	$47,470,458
TSLA	Tesla, Inc.	100,000	$42,060,000
AMZN	Amazon Com Inc	100,000	$23,834,000
PFE	Pfizer Inc	965,537	$23,250,130
BREZ	Breeze Acquisition Corp. II	557,070	$5,520,563
QLEP	Quantum Leap Acquisition Corp	496,600	$4,931,238
OHAC	Oceanhawk Acquisition Corp.	472,530	$4,678,047
SAGU	Shreya Acquisition Group	447,352	$4,424,311
MTNE	CH4 Natural Solutions Corp	297,960	$2,934,906
ARCL	ARC Group Acquisition I Corp.	285,833	$2,824,030
IDAC	Iron Dome Acquisition I Corp.	256,800	$2,593,680
TRAD	APEX Tech Acquisition Inc.	248,500	$2,472,575
GLED	GalaxyEdge Acquisition Corp	248,525	$2,470,338
MCAH	Mountain Crest Acquisition 6 Corp.	248,540	$2,465,516
APMC	AmperCap Acquisition Co	247,605	$2,448,813
APUR	Aperture AC	228,779	$2,264,912
TVIV	Texas Ventures Acquisition IV Corp	198,840	$1,988,400
ACGC	ACP Holdings Acquisition Corp.	198,860	$1,976,668
PLUN	Plutonian Acquisition Corp. II	198,610	$1,976,169
IACQ	Irenic Acquisition Corp.	263,652	$1,975,412
CAII	Collective Acquisition Corp. II	298,380	$1,969,308
MYX	Maywood Acquisition Corp. 2	298,440	$1,720,009
CAES	Cantor Equity Partners VII, Inc.	149,130	$1,504,721
No positions match the current search.

Sold Out

Positions the filer fully exited

20 positions

Ticker	Company	Shares	Value
HDRN	Hadron Energy, Inc.	1,735,682	$18,485,013
ALFUU	Centurion Acquisition Corp.	1,157,544	$12,489,899
TMS	Teamshares Inc	647,661	$6,735,674
BACC	Blue Acquisition Corp/Cayman	573,501	$4,509,246
FAC	Factorial Energy Inc.	393,552	$4,035,875
ATII	Archimedes Tech SPAC Partners II Co.	208,065	$2,165,956
CCXI	Churchill Capital Corp XI	185,064	$1,709,318
SIGI	Selective Insurance Group Inc	5,100	$384,489
ENHA	Enhanced Group Inc.	306,725	$0
—		1,877,833	$0
—		2,229,948	$0
BCARU	D. Boral ARC Acquisition I Corp.	226,854	$0
SIMAU	SIM Acquisition Corp. I	912,286	$0
—		53,846	$0
—		661,663	$0
FVN	Future Vision II Acquisition Corp.	371,104	$0
—		2,321,633	$0
—		151,237	$0
—		1,363,573	$0
—		1,466,215	$0
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

259 tracked positions · $2,098,280,715 total · filing declares 2 positions · $78,434,132 · as of Jun 30, 2026

All sectors Communication Services Consumer Cyclical Energy Financial Services Healthcare Industrials Real Estate Technology

Showing 1–50 of 259 positions by value · page 1 of 6

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
EPD	Enterprise Products Partners L.P. Energy	Held	6,825,000	0	$250,887,000	−2.9%	11.96%
ET	Energy Transfer LP Energy	Held	8,250,000	0	$157,740,000	−0.9%	7.52%
MSFT	Microsoft Corp PUT + SHARES Technology	NEW	298,800	NEW	$111,458,376	NEW	5.31%
KMI	Kinder Morgan, Inc. Energy	Held	2,837,206	0	$90,705,475	−4.7%	4.32%
PAA	Plains All American Pipeline LP Energy	Added	3,184,307	+500,000	$70,882,673	+18.3%	3.38%
ON	On Semiconductor Corp Technology	Held	731,118	0	$69,119,895	+52.7%	3.29%
WES	Western Midstream Partners, LP Energy	Held	1,266,970	0	$55,442,607	+6.3%	2.64%
NVDA	Nvidia Corp PUT + SHARES Technology	NEW	249,600	NEW	$49,942,464	NEW	2.38%
TSM	Taiwan Semiconductor Manufacturing Co Ltd PUT + SHARES Technology	NEW	99,400	NEW	$47,470,458	NEW	2.26%
PGR	Progressive Corp/Oh/ Financial Services	Held	207,589	0	$45,347,817	+10.2%	2.16%
TSLA	Tesla, Inc. PUT + SHARES Consumer Cyclical	NEW	100,000	NEW	$42,060,000	NEW	2.00%
		Added	3,265,181	+638,649	$37,288,367	+25.7%	1.78%
DRDB	Roman DBDR Acquisition Corp. II Financial Services	Added	2,276,587	+475,757	$23,983,844	+27.2%	1.14%
AMZN	Amazon Com Inc PUT + SHARES Consumer Cyclical	NEW	100,000	NEW	$23,834,000	NEW	1.14%
PFE	Pfizer Inc Healthcare	NEW	965,537	NEW	$23,250,130	NEW	1.11%
GBLI	Global Indemnity Group, LLC Financial Services	Held	919,661	0	$23,019,114	−8.1%	1.10%
		Added	2,211,677	+442,054	$22,846,623	+26.4%	1.09%
SBXD	SilverBox Corp IV Financial Services	Added	1,930,127	+415,554	$20,864,672	+28.7%	0.99%
EVAC	EQV Ventures Acquisition Corp. II Financial Services	Added	1,880,883	+29,408	$19,147,388	+2.5%	0.91%
LPAAU	Launch One Acquisition Corp. Financial Services	Added	1,675,043	+187,918	$18,157,466	+14.0%	0.87%
KCHV	Kochav Defense Acquisition Corp. Financial Services	Reduced	1,690,352	-388,695	$17,528,950	+1.2%	0.84%
MCGA	Yorkville Acquisition Corp. Financial Services	Held	1,685,246	0	$16,801,269	+1.0%	0.80%
GTERA	Globa Terra Acquisition Corp Financial Services	Added	1,561,028	+498,843	$16,094,198	+48.4%	0.77%
VLOS	Velos Acquisition I Corp. Financial Services	Added	1,429,725	+466,050	$15,483,921	+49.6%	0.74%
JOE	ST JOE Co Real Estate	Held	209,542	0	$13,123,615	−0.3%	0.63%
GIW	GigCapital8 Corp. Financial Services	Reduced	1,289,470	-338,411	$12,983,673	+1.0%	0.62%
TACO	Berto Acquisition Corp. Financial Services	Reduced	1,225,999	-596,599	$12,860,729	−31.2%	0.61%
XRPN	Armada Acquisition Corp. II Financial Services	Held	1,289,816	0	$12,855,518	+1.1%	0.61%
CEPO	Cantor Equity Partners I, Inc. Financial Services	Added	1,444,647	+222,210	$12,756,233	−0.6%	0.61%
CRAC	Crown Reserve Acquisition Corp. I Financial Services	Added	1,217,433	+740,671	$12,308,247	+172.2%	0.59%
FACT	FACT II Acquisition Corp.	Added	1,153,140	+827,695	$12,257,878	+258.7%	0.58%
NPAC	New Providence Acquisition Corp. III/Cayman Financial Services	Added	1,179,542	+534,113	$12,244,825	+84.9%	0.58%
KFII	K&F Growth Acquisition Corp. II Financial Services	Reduced	1,456,730	-15,045	$11,859,845	+5.8%	0.57%
QSEA	Quartzsea Acquisition Corp Financial Services	Added	1,094,190	+688,641	$11,510,878	+173.7%	0.55%
HVII	Hennessy Capital Investment Corp. VII Financial Services	Added	1,196,423	+219,214	$11,510,392	+52.6%	0.55%
COPL	Copley Acquisition Corp Financial Services	Added	1,084,469	+56,845	$11,311,011	+6.7%	0.54%
IPEX	Inflection Point Acquisition Corp. V Financial Services	Added	1,060,952	+79,856	$11,150,605	+9.3%	0.53%
JACS	Jackson Acquisition Co II Financial Services	Added	927,836	+497,474	$9,872,175	+116.6%	0.47%
FGII	FG Imperii Acquisition Corp. Financial Services	Reduced	1,392,100	-96,050	$9,851,553	+0.3%	0.47%
CHAR	Charlton Aria Acquisition Corp Financial Services	Held	878,975	0	$9,492,930	+2.1%	0.45%
XSLL	Xsolla SPAC 1 Financial Services	Reduced	1,280,805	-99,480	$9,109,881	+0.7%	0.43%
LPBB	Launch Two Acquisition Corp. Financial Services	Added	847,934	+31,217	$9,089,852	+4.8%	0.43%
QUMS	Quantumsphere Acquisition Corp Financial Services	Added	905,510	+361,860	$9,007,928	+75.0%	0.43%
RFAI	RF Acquisition Corp II Financial Services	Added	814,851	+48,426	$8,987,806	+7.6%	0.43%
SOUL	Soulpower Acquisition Corp. Financial Services	Held	866,764	0	$8,971,007	+1.0%	0.43%
AEXA	American Exceptionalism Acquisition Corp. A Financial Services	Added	747,779	+326,620	$8,838,747	+93.8%	0.42%
GIX	GigCapital9 Corp. Financial Services	Reduced	1,282,431	-482,431	$8,762,539	+1.0%	0.42%
SZZL	Sizzle Acquisition Corp. II Financial Services	Added	873,645	+386,613	$8,738,121	+114.2%	0.42%
MACI	Melar Acquisition Corp. I/Cayman Financial Services	Reduced	795,916	-203,047	$8,659,566	−19.5%	0.41%
SDHI	Siddhi Acquisition Corp (Cayman Islands) Financial Services	Added	920,198	+321,730	$8,617,194	+76.0%	0.41%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.