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; 954 institutions reported holding it in 13F filings for Q2 2026, worth $19.7B in total; Markel Group is the only superinvestor holding it.
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.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Berkley William R | 13D/A | 25.51%95.6M shares | +0.37 ppfrom 25.14% | Dec 11, 20252 filings | Mar 5, 2026 | SEC |
| Mitsui Sumitomo Insurance Co Ltd | 13D/A | 15.70%58.8M shares | +2.90 ppfrom 12.80% | Dec 11, 20252 filings | Mar 5, 2026 | SEC |
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
5 Schedule 13D and 13G filings on Berkley W R Corp, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20262:17 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Mar 5, 20268:00 AM ET | Berkley William Rand 7 others | 13D/A | 25.51%95.6M shares | +0.37 ppfrom 25.14% | Mar 4, 2026 | SEC |
| Mar 5, 20267:00 AM ET | Mitsui Sumitomo Insurance Co Ltdand 1 other | 13D/A | 15.70%58.8M shares | +2.90 ppfrom 12.80% | Mar 4, 2026 | SEC |
| Dec 11, 20259:49 PM ET | Berkley William Rand 7 others | 13D | 25.14%95.6M shares | New | Dec 5, 2025 | SEC |
| Dec 11, 20255:03 PM ET | Mitsui Sumitomo Insurance Co Ltdand 1 other | 13D | 12.80%48.6M shares | New | Dec 4, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Berkley W R Corp shares.
No Form 144 notices for Berkley W R Corp are on file.