Filer Snapshot

William R. Berkley SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0000918186.

Entity Type

Individual

Total Filings

118

Latest Filing

05 Mar 2026

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Schedule 13D/G

SCHEDULE 13D/A filed on 05 Mar 2026 for CIK 0000918186.

View Source Filing
Business address
165 Mason Street, Greenwich, CT, 06830
Top holdings (ownership)
WRB
Top holdings (Schedule 13D)
WRB
State of incorporation
CT
Fiscal year end
31 December

Quick Takeaways

  • William R. Berkley is an SEC filer tracked under CIK 0000918186.
  • 118 filings are listed on this profile.
  • Common form coverage includes SCHEDULE 13D/A, SCHEDULE 13D, 4 and more.

What Changed

  • Latest filing: SCHEDULE 13D/A filed on 05 Mar 2026.
  • Report period: not specified in filing header.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Source Evidence

Source: SEC Schedule 13D/G

SCHEDULE 13D/A filed on 05 Mar 2026 for CIK 0000918186.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed SCHEDULE 13D/A can change the filing history, ownership context, or next research path for William R. Berkley.

Latest source-backed update
SCHEDULE 13D/A filed 05 Mar 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: SCHEDULE 13D/A filed 05 Mar 2026.
  • Save this filer if you want a stable place to return after the next filing cycle.
  • Open the latest filing table or ownership context to verify what changed.

Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for William R. Berkley

New filing available

Latest Schedule 13D/G period: 04 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

05 Mar 2026

Page type

Filer profile

Latest period

04 Mar 2026

Schedule 13D/G context is visible from filings filed on 05 Mar 2026.

Open filer profile Browse recent public updates

Filer Overview

William R. Berkley has filed 118 SEC EDGAR filings since 27 Jan 1994. Common forms include SCHEDULE 13D/A, SCHEDULE 13D, 4, SC 13G/A and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for William R. Berkley with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 05 Mar 2026
SCHEDULE 13D Open SCHEDULE 13D document View SEC filing for SCHEDULE 13D 11 Dec 2025
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 19 Aug 2025 15 Aug 2025 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 13 Jun 2025 11 Jun 2025 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 19 Aug 2024 15 Aug 2024 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 12 Jun 2024 12 Jun 2024 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 17 Aug 2023 15 Aug 2023 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 14 Jun 2023 14 Jun 2023 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 17 Aug 2022 15 Aug 2022 001-15202
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 15 Jun 2022 15 Jun 2022 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Aug 2021 16 Aug 2021 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 09 Aug 2021 05 Aug 2021 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Jun 2021 15 Jun 2021 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Aug 2020 17 Aug 2020 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Aug 2020 05 Aug 2020 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Jun 2020 12 Jun 2020 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Aug 2019 05 Aug 2019 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Jun 2019 06 Jun 2019 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Aug 2018 06 Aug 2018 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Jun 2018 31 May 2018 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 09 Aug 2017 07 Aug 2017 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 May 2017 16 May 2017 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 May 2016 25 May 2016 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Jan 2016 30 Dec 2015 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Jun 2015 02 Jun 2015 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Mar 2015 02 Mar 2015 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 May 2014 20 May 2014 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Aug 2013 22 Jul 2013 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 May 2013 21 May 2013 001-15202
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT #13 14 Feb 2013
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Jan 2013 27 Dec 2012 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2012 17 Dec 2012 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Sep 2012 26 Sep 2012 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 May 2012 22 May 2012 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Feb 2012 02 Feb 2012 001-15202
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 12 02 Feb 2012
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2012 30 Dec 2011 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Dec 2011 22 Dec 2011 001-15202
4 Open 4 document View SEC filing for 4 FORM 4 22 Sep 2011 20 Sep 2011 001-31825
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 May 2011 17 May 2011 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 11 Mar 2011 10 Mar 2011 001-15202
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 11 07 Feb 2011
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2011 31 Dec 2010 001-15202
4 Open 4 document View SEC filing for 4 FORM 4 - 21 Sep 2010 20 Sep 2010 001-31825
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 May 2010 18 May 2010 001-15202
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Mar 2010 02 Mar 2010 001-15202
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A TENTH AMENDMENT 08 Feb 2010

About this filer

William R. Berkley files with the SEC under CIK 0000918186. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.
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