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Berkley W R Corp

WRB
Exchange
NYSE
Industry
Fire, Marine & Casualty Insurance
SEC CIK
0000011544

No open-market purchases or sales by Berkley W R Corp insiders were filed in the last 90 days; 959 institutions reported holding it in 13F filings for Q2 2026, worth $19.7B in total; Markel Group is the only superinvestor holding it.

Other share classesWRB.PEWRB.PFWRB.PGWRB.PH

Holders of 5% or more of WRB

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Berkley W R Corp, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of WRB
HolderLatest formStakeChangeFirst filedLatest filingFiling
Berkley William R Jr13D/A25.67%95.6M shares–Jul 21, 20261 filingJul 21, 2026SEC
Berkley William R13D/A25.51%95.6M shares+0.37 ppfrom 25.14%Dec 11, 20252 filingsMar 5, 2026SEC
Mitsui Sumitomo Insurance Co Ltd13D/A15.80%58.8M shares+0.10 ppfrom 15.70%Dec 11, 20255 filingsJun 4, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

25 Schedule 13D and 13G filings on Berkley W R Corp, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on WRB
Filed (ET)FilerFormStakeChangeEvent dateFiling
Oct 30, 202612:41 PM ETVanguard Capital Management LLC13G/A4.44%16.5M shares−1.36 ppfrom 5.80%Below 5%Sep 30, 2026SEC
Oct 27, 20265:25 PM ETBlackRock, Inc.13G/A4.60%17.2M shares–Below 5%Sep 30, 2026SEC
Jul 21, 20265:58 PM ETBerkley William R Jrand 7 others13D/A25.67%95.6M shares–Jul 17, 2026SEC
Jun 4, 20268:36 PM ETMitsui Sumitomo Insurance Co Ltdand 1 other13D/A15.80%58.8M shares+0.10 ppfrom 15.70%Jun 3, 2026SEC
Apr 30, 20262:36 PM ETVanguard Capital Management LLC13G5.80%21.7M sharesNewMar 31, 2026SEC
Mar 27, 20262:17 PM ETVanguard Group Inc13G/A0.00%0 shares–Below 5%Mar 13, 2026SEC
Mar 5, 20268:00 AM ETBerkley William Rand 7 others13D/A25.51%95.6M shares+0.37 ppfrom 25.14%Mar 4, 2026SEC
Mar 5, 20267:00 AM ETMitsui Sumitomo Insurance Co Ltdand 1 other13D/A15.70%58.8M shares+0.80 ppfrom 14.90%Mar 4, 2026SEC
Feb 6, 20268:45 PM ETMitsui Sumitomo Insurance Co Ltdand 1 other13D/A14.90%56.5M shares+1.00 ppfrom 13.90%Feb 5, 2026SEC
Jan 14, 20269:51 PM ETMitsui Sumitomo Insurance Co Ltdand 1 other13D/A13.90%52.7M shares+1.10 ppfrom 12.80%Jan 13, 2026SEC
Dec 11, 20259:49 PM ETBerkley William Rand 7 others13D25.14%95.6M sharesNewDec 5, 2025SEC
Dec 11, 20255:03 PM ETMitsui Sumitomo Insurance Co Ltdand 1 other13D12.80%48.6M sharesNewDec 4, 2025SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Jan 29, 20243:26 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 20234:54 PM ETBlackRock Inc.13G/AOld format–––SEC
Dec 12, 20224:25 PM ETMorgan Stanley13G/AOld format–––SEC
Feb 10, 20221:35 PM ETMorgan Stanley13G/AOld format–––SEC
Feb 10, 2022Vanguard Group Inc13G/AOld format–––SEC
Jan 31, 20225:59 PM ETBlackRock Inc.13G/AOld format–––SEC
Dec 10, 20213:14 PM ETMorgan Stanley13G/AOld format–––SEC
Feb 12, 2021Eaton Vance Management13G/AOld format–––SEC
Feb 12, 2021Eaton Vance Management13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Feb 1, 20218:23 AM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

1 notice from officers, directors and other affiliates planning to sell Berkley W R Corp shares, newest first.

Form 144 notices for WRB
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Jul 28, 20254:26 PM ETMark ShapiroFormer Board Member53.4K$3.67MJul 28, 2025J.P. Morgan Securities LLCSEC