How many institutional investors hold WRB?

2 tracked institutional investors disclosed a position in WRB (BERKLEY W R CORP) in their most recent 13F filing.

Who is the largest institutional holder of WRB?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in WRB, valued at $97M.

Where does this WRB ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

WRB — BERKLEY W R CORP

Name: BERKLEY W R CORP (WRB) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About BERKLEY W R CORP (WRB)

BERKLEY W R CORP (WRB) appears in the most recent 13F filings of 2 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $97M. Across recent filings, tracked investors recorded 4 new positions, 0 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Tracked investors reporting WRB

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	1.5M	$96.9M	0.02%	Mar 31, 2026
Izzy Englander	Millennium Management	459.2K	$30.4M	0.01%	Mar 31, 2026

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
1.5M
Value
$96.9M
% Portfolio
0.02%
Izzy EnglanderMar 31, 2026
Millennium Management
Shares
459.2K
Value
$30.4M
% Portfolio
0.01%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	New	—	$2.5M	Feb 17, 2026
Izzy Englander	New	—	$30.4M	May 15, 2026
Ken Griffin	New	—	$96.9M	May 15, 2026
Ken Griffin	New	—	$10.5M	Nov 14, 2025

Izzy Englander
New
$2.5MFeb 17, 2026
Izzy Englander
New
$30.4MMay 15, 2026
Ken Griffin
New
$96.9MMay 15, 2026
Ken Griffin
New
$10.5MNov 14, 2025

Frequently asked questions

How many institutional investors hold WRB?: 2 tracked institutional investors disclosed a position in WRB (BERKLEY W R CORP) in their most recent 13F filing.
Who is the largest institutional holder of WRB?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in WRB, valued at $97M.
Did institutional ownership of WRB increase or decrease?: Across recent 13F filings, tracked investors recorded 4 new positions, 0 increased, 0 reduced, and 0 fully exited WRB.
Where does this WRB ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.