BERKLEY W R CORP

CIK

11544

Location

Greenwich, CT

Portfolio Value

Mid $1,746,114,109

Diversification

Diversified

Filing Date

Global Rank

#1,289 / 8,603 ▼ 58 · as of Mar 2026

Top Industry

Shell Companies 53.9%

3Y Alpha vs SPY

-7.7%

Period ended 3 months ago

Filed May 15, 2026 · 55d

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+45.3%

SPY

+76.0%

Annualised alpha

-7.5%

Max drawdown

−21.1%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

203 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

14.8%

+3.6 pts

Top 5

35.8%

−5.4 pts

Top 10

45.4%

−12.8 pts

HHI

401

Diversified−48

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Financial Services	57.1%	$996,579,564	186
Energy	35.8%	$624,716,246	5
Technology	2.6%	$45,270,826	1
Unclassified	1.9%	$32,833,122	6
Industrials	1.3%	$22,520,888	2
Real Estate	0.8%	$13,159,237	1
Communication Services	0.5%	$7,914,833	1
Consumer Defensive	0.2%	$3,119,393	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
DRDB	Roman DBDR Acquisition Corp. II	+1,533,196	1,800,830	$18,854,690
MLAC	Mountain Lake Acquisition Corp.	+1,515,300	1,877,833	$19,773,581
HDRN	Hadron Energy, Inc.	+1,312,087	1,735,682	$18,485,013
MCGA	Yorkville Acquisition Corp.	+1,262,223	1,645,570	$16,636,712
CAEP	Cantor Equity Partners III, Inc.	+1,176,710	2,229,948	$22,990,763
LEGT	Legato Merger Corp. III	+1,147,470	1,466,215	$16,113,702
ALF	Centurion Acquisition Corp.	+914,380	1,157,544	$12,455,173
CCIX	Churchill Capital Corp IX/Cayman	+874,256	1,810,437	$19,335,467
TACO	Berto Acquisition Corp.	+797,864	1,822,598	$18,681,629
XRPN	Armada Acquisition Corp. II	+681,754	1,233,735	$12,719,807
IPCX	Inflection Point Acquisition Corp. III	+585,430	1,769,623	$18,076,698
GPAT	GP-Act III Acquisition Corp.	+534,533	846,823	$9,179,561
SOUL	Soulpower Acquisition Corp.	+519,434	866,764	$8,884,331
VCIC	Vine Hill Capital Investment Corp.	+495,413	661,663	$7,278,293
RFAI	RF Acquisition Corp II	+468,547	766,425	$8,354,032
SIMA	SIM Acquisition Corp. I	+390,768	912,286	$9,779,705
WES	Western Midstream Partners, LP	+379,807	1,266,970	$52,161,154
HYAC	Haymaker Acquisition Corp. 4	+357,426	2,321,633	$26,791,644
DYNC	Dynamix Corp	+314,051	790,503	$8,276,566
PGAC	PANTAGES CAPITAL ACQUISITION Corp	+292,546	874,411	$9,163,827
CUB	Lionheart Holdings	+285,106	916,973	$9,866,629
TMS	Teamshares Inc	+270,469	647,661	$6,735,674
CEPO	Cantor Equity Partners I, Inc.	+251,910	1,222,437	$12,835,588
HVII	Hennessy Capital Investment Corp. VII	+250,490	728,659	$7,541,620
SDHI	Siddhi Acquisition Corp (Cayman Islands)	+249,494	473,618	$4,897,210
No positions match the current search.

Trimmed

Positions the filer reduced

11 positions

Ticker	Company	Δ Shares	Shares	Value
KVAC	Keen Vision Acquisition Corp.	−649,375	99,997	$1,199,964
VACH	Voyager Acquisition Corp./Cayman Islands	−497,241	1,303,583	$15,656,031
CAPN	Cayson Acquisition Corp	−266,020	497,282	$5,470,102
RIBB	Ribbon Acquisition Corp.	−165,015	297,589	$3,127,660
SVAC	Spring Valley Acquisition Corp. III	−158,723	39,676	$403,108
COLA	Columbus Acquisition Corp/Cayman Islands	−154,772	250,259	$2,627,719
EGHA	EGH Acquisition Corp.	−41,763	107,037	$1,092,847
CEPT	Cantor Equity Partners II, Inc.	−36,345	27,672	$301,348
MBAV	M3-Brigade Acquisition V Corp.	−32,603	963,675	$10,349,869
TVA	Texas Ventures Acquisition III Corp	−26,500	64,694	$672,170
ATII	Archimedes Tech SPAC Partners II Co.	−20,141	208,065	$2,165,956
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
FGII	FG Imperii Acquisition Corp.	992,100	$9,821,790
XSLL	Xsolla SPAC 1	920,190	$9,045,467
GIX	GigCapital9 Corp.	882,431	$8,674,296
PTOR	Praetorian Acquisition Corp.	795,690	$7,797,762
DAAQ	Digital Asset Acquisition Corp.	761,331	$7,796,029
ZKP	Lafayette Digital Acquisition Corp. I	646,456	$6,374,056
KTWO	K2 Capital Acquisition Corp	596,880	$5,891,205
SSAC	SPACSphere Acquisition Corp.	573,350	$5,676,165
XFLH	XFLH Capital Corp	571,683	$5,642,511
GPAC	General Purpose Acquisition Corp.	518,564	$5,138,969
MLAA	Mountain Lake Acquisition Corp. II	447,794	$4,410,770
ALOV	Aldabra 4 Liquidity Opportunity Vehicle, Inc.	446,445	$4,388,554
CAQ	Cambridge Acquisition Corp.	424,998	$4,194,730
UAC	United Acquisition Corp. I	422,792	$4,143,361
SCII	SC II Acquisition Corp.	412,893	$4,116,543
DBCA	D. Boral Acquisition I Corp.	397,720	$3,921,519
AEAQ	Activate Energy Acquisition Corp.	347,036	$3,432,186
RFAM	RF Acquisition Corp III	333,057	$3,260,628
CLBR	Colombier Acquisition Corp. III	298,440	$3,002,306
HCIC	Hennessy Capital Investment Corp. VIII	298,440	$2,933,665
BIII	Black Spade Acquisition III Co	273,849	$2,694,674
IEAG	Infinite Eagle Acquisition Corp.	265,211	$2,652,110
SVIV	Spring Valley Acquisition Corp. IV	250,000	$2,467,500
CRAN	Crane Harbor Acquisition Corp. II	247,775	$2,455,450
MUZE	Muzero Acquisition Corp	248,700	$2,452,182
No positions match the current search.

Sold Out

Positions the filer fully exited

12 positions

Ticker	Company	Shares	Value
NVDA	Nvidia Corp	886,200	$165,276,300
MSFT	Microsoft Corp	305,200	$147,600,824
GOOGL	Alphabet Inc.	438,800	$137,344,400
TSLA	Tesla, Inc.	266,600	$119,895,352
NFLX	Netflix Inc	498,000	$46,692,480
AMZN	Amazon Com Inc	139,200	$32,130,144
CRM	Salesforce, Inc.	103,800	$27,497,658
FTW	PRESIDIO PRODUCTION Co	2,574,165	$27,002,990
HSPT	Horizon Space Acquisition II Corp.	722,015	$7,613,648
PELI	Pelican Acquisition Corp	578,199	$5,869,298
RDAC	Rising Dragon Acquisition Corp.	234,886	$2,306,580
TBMC	Trailblazer Merger Corp I	43,243	$576,083
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

203 positions · $1,746,114,109 total · as of Mar 31, 2026

All sectors Communication Services Consumer Defensive Energy Financial Services Industrials Real Estate Technology

Showing 1–50 of 203 positions by value · page 1 of 5

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
EPD	Enterprise Products Partners L.P. Energy	Held	6,825,000	0	$258,258,000	+18.0%	14.79%
ET	Energy Transfer LP Energy	Held	8,250,000	0	$159,225,000	+17.0%	9.12%
KMI	Kinder Morgan, Inc. Energy	Held	2,837,206	0	$95,131,517	+22.0%	5.45%
PAA	Plains All American Pipeline LP Energy	Held	2,684,307	0	$59,940,575	+24.3%	3.43%
WES	Western Midstream Partners, LP Energy	Added	1,266,970	+379,807	$52,161,154	+48.8%	2.99%
ON	On Semiconductor Corp Technology	Held	731,118	0	$45,270,826	+14.3%	2.59%
PGR	Progressive Corp/Oh/ Financial Services	Added	207,589	+100,000	$41,152,443	+68.0%	2.36%
ANSC	Agriculture & Natural Solutions Acquisition Corp Financial Services	Added	2,626,532	+100,954	$29,653,546	+4.9%	1.70%
HYAC	Haymaker Acquisition Corp. 4 Financial Services	Added	2,321,633	+357,426	$26,791,644	+19.9%	1.53%
GBLI	Global Indemnity Group, LLC Financial Services	Held	919,661	0	$25,042,369	−4.1%	1.43%
CAEP	Cantor Equity Partners III, Inc. Financial Services	Added	2,229,948	+1,176,710	$22,990,763	+114.0%	1.32%
MLAC	Mountain Lake Acquisition Corp.	Added	1,877,833	+1,515,300	$19,773,581	+424.5%	1.13%
CCIX	Churchill Capital Corp IX/Cayman Financial Services	Added	1,810,437	+874,256	$19,335,467	+94.3%	1.11%
DRDB	Roman DBDR Acquisition Corp. II Financial Services	Added	1,800,830	+1,533,196	$18,854,690	+575.5%	1.08%
TACO	Berto Acquisition Corp. Financial Services	Added	1,822,598	+797,864	$18,681,629	+79.8%	1.07%
EVAC	EQV Ventures Acquisition Corp. II Financial Services	Held	1,851,475	0	$18,681,382	+0.6%	1.07%
HDRN	Hadron Energy, Inc. Industrials	Added	1,735,682	+1,312,087	$18,485,013	+314.0%	1.06%
IPCX	Inflection Point Acquisition Corp. III Financial Services	Added	1,769,623	+585,430	$18,076,698	+50.5%	1.04%
KCHV	Kochav Defense Acquisition Corp. Financial Services	Added	1,690,352	+3,777	$17,326,108	+1.3%	0.99%
MCGA	Yorkville Acquisition Corp. Financial Services	Added	1,645,570	+1,262,223	$16,636,712	+328.4%	0.95%
LEGT	Legato Merger Corp. III Financial Services	Added	1,466,215	+1,147,470	$16,113,702	+364.6%	0.92%
LPAA	Launch One Acquisition Corp. Financial Services	Added	1,487,125	+63,835	$15,927,108	+5.7%	0.91%
VACH	Voyager Acquisition Corp./Cayman Islands Financial Services	Reduced	1,303,583	-497,241	$15,656,031	−18.5%	0.90%
JOE	ST JOE Co Real Estate	Held	209,542	0	$13,159,237	+5.8%	0.75%
GIW	GigCapital8 Corp. Financial Services	Held	1,289,470	0	$12,856,015	+0.8%	0.74%
CEPO	Cantor Equity Partners I, Inc. Financial Services	Added	1,222,437	+251,910	$12,835,588	+27.0%	0.74%
XRPN	Armada Acquisition Corp. II Financial Services	Added	1,233,735	+681,754	$12,719,807	+125.0%	0.73%
ALF	Centurion Acquisition Corp. Financial Services	Added	1,157,544	+914,380	$12,455,173	+381.0%	0.71%
KFII	K&F Growth Acquisition Corp. II Financial Services	Added	1,074,855	+99,400	$11,210,737	+11.1%	0.64%
GTERA	Globa Terra Acquisition Corp Financial Services	Added	1,062,185	+175,422	$10,844,908	+21.1%	0.62%
MACI	Melar Acquisition Corp. I/Cayman Financial Services	Added	998,963	+130,474	$10,758,831	+16.5%	0.62%
COPL	Copley Acquisition Corp Financial Services	Added	1,027,624	+99,405	$10,605,079	+11.2%	0.61%
MBAV	M3-Brigade Acquisition V Corp. Financial Services	Reduced	963,675	-32,603	$10,349,869	−2.3%	0.59%
IPEX	Inflection Point Acquisition Corp. V Financial Services	Added	981,096	+223,150	$10,203,398	+31.0%	0.58%
CUB	Lionheart Holdings Financial Services	Added	916,973	+285,106	$9,866,629	+46.9%	0.57%
FGII	FG Imperii Acquisition Corp. Financial Services	NEW	992,100	NEW	$9,821,790	NEW	0.56%
SIMA	SIM Acquisition Corp. I Financial Services	Added	912,286	+390,768	$9,779,705	+77.1%	0.56%
CHAR	Charlton Aria Acquisition Corp Financial Services	Added	878,975	+142,746	$9,299,555	+20.9%	0.53%
GPAT	GP-Act III Acquisition Corp. Financial Services	Added	846,823	+534,533	$9,179,561	+175.0%	0.53%
PGAC	PANTAGES CAPITAL ACQUISITION Corp Financial Services	Added	874,411	+292,546	$9,163,827	+52.0%	0.52%
XSLL	Xsolla SPAC 1 Financial Services	NEW	920,190	NEW	$9,045,467	NEW	0.52%
SOUL	Soulpower Acquisition Corp. Financial Services	Added	866,764	+519,434	$8,884,331	+152.0%	0.51%
GIX	GigCapital9 Corp. Financial Services	NEW	882,431	NEW	$8,674,296	NEW	0.50%
PLMK	Plum Acquisition Corp, IV Financial Services	Added	804,192	+35,304	$8,492,267	+5.6%	0.49%
RFAI	RF Acquisition Corp II Financial Services	Added	766,425	+170,669	$8,354,032	+30.4%	0.48%
DYNC	Dynamix Corp Financial Services	Added	790,503	+314,051	$8,276,566	+68.8%	0.47%
CEPV	Cantor Equity Partners V, Inc. Financial Services	Held	792,962	0	$8,008,916	−1.5%	0.46%
VZ	Verizon Communications Inc Communication Services	Held	157,666	0	$7,914,833	+23.3%	0.45%
PTOR	Praetorian Acquisition Corp. Financial Services	NEW	795,690	NEW	$7,797,762	NEW	0.45%
DAAQ	Digital Asset Acquisition Corp. Financial Services	NEW	761,331	NEW	$7,796,029	NEW	0.45%