W.R. Berkley Corporation (WRB)
NYSE: WRB · Fire, Marine & Casualty Insurance · Greenwich, CT · filing with the SEC since 1994
Grade6.5
◀ Past 7.3● Present 6.3▶ Future 5.5
Who owns W.R. Berkley Corporation
As filed with the SECHolders of 5% or more
4
WR Berkley & Others LLC holds 25.7% of Common Stock, par value $0.20 per share, as its SCHEDULE 13D/A filed Jul 21, 2026 says.
Directors and officers
15
report now, of 23 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
WR Berkley & Others LLC
SCHEDULE 13D/A · filed Jul 21, 2026 · Common Stock, par value $0.20 per share
WR Berkley & Others LLC
SCHEDULE 13D/A · filed Mar 5, 2026 · Common Stock, par value $0.20 per share · 25.1% in Dec 11, 2025
Mitsui Sumitomo Insurance Co., Ltd.
SCHEDULE 13D/A · filed Jun 4, 2026 · Common Stock, par value $0.20 per share · 15.7% in Mar 5, 2026
Vanguard Capital Management
SCHEDULE 13G · filed Apr 30, 2026 · Common Stock
Blackrock, Inc.
SCHEDULE 13G/A · filed Oct 27, 2026 · Common Stock · reported falling below 5%
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
What WRB reports owning in othersstakes of 5% or more, and other ties
Roman DBDR Acquisition Corp. II
SCHEDULE 13G/A · filed Aug 5, 2026 · Class A ordinary shares, par value $0.0001 per share
Agriculture & Natural Solutions Acquisition Corporation
SCHEDULE 13G/A · filed Aug 5, 2026 · Class A ordinary shares, par value $0.0001 per share
Charlton Aria Acquisition Corporation CHAR
SCHEDULE 13G/A · filed May 7, 2026 · Class A ordinary shares, par value $0.0001 per share
SilverBox Corp IV SBXD
SCHEDULE 13G/A · filed Aug 6, 2026 · Class A Ordinary Shares, par value $0.0001 per share
Cayson Acquisition Corp CAPN
SCHEDULE 13G/A · filed May 7, 2026 · Ordinary Shares, par value $0.0001 per share
RF Acquisition Corp II RFAI
SCHEDULE 13G · filed May 8, 2026 · Ordinary shares, par value $0.0001 per share
Yorkville Acquisition Corp. MCGA
SCHEDULE 13G · filed May 8, 2026 · Class A ordinary shares, par value $0.0001 per share
Oak Woods Acquisition Corporation
SCHEDULE 13G/A · filed Feb 11, 2026 · Class A Ordinary Shares, par value $0.0001 per share
Inflection Point Acquisition Corp. V IPEX
SCHEDULE 13G/A · filed May 8, 2026 · Class A ordinary shares, par value $0.0001 per share
Quartzsea Acquisition Corporation QSEA
SCHEDULE 13G · filed Aug 6, 2026 · Class A ordinary share, par value $0.0001 per share
The other 53
Globa Terra Acquisition Corporation
Pantages Capital Acquisition Corporation
Melar Acquisition Corp. I
Ribbon Acquisition Corporation
UY Scuti Acquisition Corp.
YHN Acquisition I Limited
Quantumsphere Acquisition Corp
Lakeshore Acquisition III Corp.
Keen Vision Acquisition Corporation
Range Capital Acquisition Corp.
Black Hawk Acquisition Corporation
EQV Ventures Acquisition Corp.
Cantor Equity Partners I, Inc.
Crown Reserve Acquisition Corp. I
Kochav Defense Acquisition Corp.
Tavia Acquisition Corp.
FACT II Acquisition Corp.
Launch One Acquisition Corp.
Wintergreen Acquisition Corp.
Copley Acquisition Corp
Hennessy Capital Investment Corp. VII
Columbus Acquisition Corp
Bayview Acquisition Corp
Armada Acquisition Corp. II
Cartesian Growth Corporation II
SCHEDULE 13G/A · filed May 8, 2026 · reported falling below 5%
GigCapital8 Corp.
SCHEDULE 13G · filed Feb 10, 2026 · reported falling below 5%
DT Cloud Star Acquisition Corporation
SCHEDULE 13G/A · filed Feb 10, 2026 · reported falling below 5%
Churchill Capital Corp Ix
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
Inflection Point Acquisition Corp. III
SCHEDULE 13G/A · filed Sep 3, 2026 · reported falling below 5%
Voyager Acquisition Corp.
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Pyrophyte Acquisition Corp.
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Mountain Lake Acquisition Corp.
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Legato Merger Corp. III
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Haymaker Acquisition Corp. 4
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Horizon Space Acquisition II Corp.
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Hadron Energy, Inc.
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Goldenstone Acquisition Limited
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Flag Ship Acquisition Corporation
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Eureka Acquisition Corp
SCHEDULE 13G/A · filed Aug 6, 2026 · reported falling below 5%
Cantor Equity Partners III, Inc.
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
BEST SPAC I Acquisition Corp.
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
AMC Robotics Corporation
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
Aimei Health Technology Co., Ltd
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
AA Mission Acquisition Corp.
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
Kodiak AI, Inc.
SCHEDULE 13G/A · filed Aug 5, 2026 · reported falling below 5%
Integrated Wellness Acquisition Corp
SCHEDULE 13G/A · filed May 8, 2026 · reported falling below 5%
A Spac III Acquisition Corp.
SCHEDULE 13G/A · filed Feb 11, 2026 · reported falling below 5%
Rigel Resource Acquisition Corp
SCHEDULE 13G/A · filed Feb 11, 2026 · reported falling below 5%
Nabors Energy Transition Corp. II
SCHEDULE 13G/A · filed Feb 11, 2026 · reported falling below 5%
Spark I Acquisition Corp.
SCHEDULE 13G/A · filed Nov 10, 2025 · reported falling below 5%
DT Cloud Acquisition Corporation
SCHEDULE 13G/A · filed Nov 10, 2025 · reported falling below 5%
Mountain & Co. I Acquisition Corp.
SCHEDULE 13G/A · filed Aug 8, 2025 · reported falling below 5%
Metal Sky Star Acquisition Corporation
SCHEDULE 13G/A · filed Aug 8, 2025 · reported falling below 5%
Other ties the annual report names
Lifson Re
An entity · legal entity · owns, named in the 10-K filed Feb 27, 2026
241 subsidiaries in 18 countries, from the list filed with the 10-K filed Feb 27, 2026. Its Form 13F-HR for Jun 30, 2026 lists 342 holdings. The record carries no value for them.
Insider tradesForm 4
0sales
0purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2022 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window2 of 25 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Ms&ad Insurance Group Holdings, Inc. | 10% owner | 0 | $0 | 0 | 52 | $373M |
| Mitsui Sumitomo Insurance Co Ltd | 10% owner | 0 | $0 | 0 | 42 | $333M |