BERKLEY W R CORP - Common Stock, par value $0.20 per share (WRB)

CUSIP: 084423102

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class
Equity / Common Stock, par value $0.20 per share
Total 13F shares
278,903,415
Total 13F value
$18,486,364,094
Holder snapshot 6 visible 7 signals
Share change
-4,902,362
Put/Call ratio
46%
SEC-reported price per share
$66.28
Number of holders
917
Value change
-$357,320,170
Number of buys
324
Open additional details 1 more signal available
Number of sells
524
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
372,028,165

Security key

084423102

Report period

Q1 2026

Institutions

917

Top holders

10

WRB full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Previous quarter: Q4 2025 BERKLEY W R CORP SEC filings BERKLEY W R CORP company facts BERKLEY W R CORP 13D/G history

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of WRB - BERKLEY W R CORP - Common Stock, par value $0.20 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
William R. Berkley
Disclosed value leader
William R. Berkley
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G 3/4/5 13F Lead comparable stake: 26% 13D/G row: William R. Berkley Showing 1-6 of 15 holder rows.

Quick read

William R. Berkley leads the comparable SEC ownership view at 26%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens William R. Berkley's linked filing trail.
Comparable ownership Top 5
William R. Berkley 26%
VANGUARD CAPITAL MANAGEMENT LLC 5.8%
MITSUI SUMITOMO INSURANCE CO LTD 16%
James G. Shiel 0.27%
Lucille T. Sgaglione 0.07%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
William R. Berkley
13D/G
13D/G
26%
$6,835,728,842
95,551,144 shares
 $0 04 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC
13D/G
Vanguard Capital Management
13D/G
5.8%
$1,440,450,117
21,732,802 shares
 $0 31 Mar 2026
MITSUI SUMITOMO INSURANCE CO LTD
3/4/5 13F
10%+ Owner · Company
3/4/5 13F
16%
$4,262,981,599
58,780,450 shares
 +$705,457,909 02 Mar 2026
James G. Shiel
3/4/5
EVP - Investments
3/4/5
0.27%
$77,932,923
1,005,197 shares
 — 18 Dec 2025
Lucille T. Sgaglione
3/4/5
EVP
3/4/5
0.07%
$17,773,023
249,784 shares
 — 15 Aug 2025
Richard M. Baio
3/4/5
EVP & CFO
3/4/5
0.06%
$16,732,463
235,590 shares
 — 15 Aug 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
917
Shares
278,903,415
Rows available
917
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders
943
Q1 2026 holders
917
Holder diff
-26
Investor Q4 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q4 2025 value Q1 2026 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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