W. R. Berkley WRB
W. R. Berkley is the 337th largest S&P 500 company by market cap, worth $27.2 billion. 11 directors have filed with the SEC in the last 12 months (who counts), 2 of them executives. 3 other officers are on file. At 30 Jun 2026, Mitsui Sumitomo Insurance Co was its largest institutional holder, with 15.8% of the company.
- CEO
- William R. Berkley Jr.
- Sector
- Financials
- Sub-industry
- Property & Casualty Insurance
- Headquarters
- Greenwich, Connecticut
- Founded
- 1967
- More
- Wikipedia
- Market cap
- $27.2B
- 337th largest, 23 Oct 2026 close
- Price to sales
- 1.9
- Less useful for banks and insurers
- Market cap per employee
- $3.1M
- Market cap over employees
- Connections
- 1
- S&P 500 companies sharing a director or officer
Largest institutional holders
Each fund group's share of W. R. Berkley. Where a company has several share classes, the share is of its total value.
13F filings for the quarter to 30 Jun 2026
Board and officers
1 person here also holds roles at other S&P 500 companies.
Roles filed up to 30 Sep 2026
| Name | Title |
|---|---|
| Directors (11) | |
| William R. Berkley Jr.Chairman, President and CEO | |
| Christopher L. AugostiniDirector | |
| William R. BerkleyExecutive Chairman | |
| Ronald E. BlaylockDirectorAlso at Pfizer | |
| Andrew CarrierDirector | |
| Mary C. FarrellDirector | |
| Maria Luisa FerreDirector | |
| Marie Angela MattsonDirector | |
| Daniel Lynn MosleyDirector | |
| Robert Alan RusbuldtDirector | |
| Jonathan TalismanDirector | |
| Officers (3) | |
| Richard Mark BaioEVP & CFOLast filed 5 Aug 2026 | |
| James G. ShielEVP - InvestmentsLast filed 5 Aug 2026 | |
| Philip S. WeltEVP & SecretaryLast filed 5 Aug 2026 | |
Companies that share people with W. R. Berkley
Each person's title here, then at the other company.
- Pfizer PFE
- Ronald E. Blaylock: Director here, Director there
W. R. Berkley's market cap since December 2008
Weekly, up to 23 Oct 2026
| Week ending | Market cap |
|---|---|
| 23 Oct 2026 | $27.2B |
| 26 Dec 2025 | $26.8B |
| 27 Dec 2024 | $22.5B |
| 29 Dec 2023 | $18.2B |
| 30 Dec 2022 | $19.3B |
| 31 Dec 2021 | $14.6B |
| 25 Dec 2020 | $11.8B |
| 27 Dec 2019 | $12.6B |
| 28 Dec 2018 | $8.9B |
| 29 Dec 2017 | $8.7B |
| 30 Dec 2016 | $8.1B |
| 25 Dec 2015 | $6.8B |
| 26 Dec 2014 | $6.5B |
| 27 Dec 2013 | $5.8B |
| 28 Dec 2012 | $5.1B |
| 30 Dec 2011 | $4.7B |
| 31 Dec 2010 | $4.0B |
| 25 Dec 2009 | $3.9B |
| 26 Dec 2008 | $4.9B |
Download W. R. Berkley's data as JSON, with the weekly market caps in billions of dollars from 5 Dec 2008.
Workforce
Headcount at 15 Jan 2026
- Employees
- 8,804
As of January 15, 2026, we employed 8,804 individuals.
Trades by members of Congress and officials
Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.
Trades from 20 Oct 2023 to 20 Oct 2026
4 people disclosed 5 purchases and 21 sales of W. R. Berkley stock since October 2023.
| Date | Member or official | Amount |
|---|---|---|
| 5 Jun 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 29 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 19 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 18 May 2026 | Donald J TrumpPresident 路 Bought | $50K to $100K |
| 14 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 13 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 12 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 7 May 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 17 Apr 2026 | Donald J TrumpPresident 路 Bought | $250K to $500K |
| 17 Apr 2026 | Donald J TrumpPresident 路 Bought | $1K to $15K |
Showing 10 of 26 trades
Not on file: no open-market insider buys or sales in the 12 months to 30 Sep 2026 and no WARN layoff notices under its own name since October 2023.