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WRB · Berkley W R Corp

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Market Cap
$25.41B
Shares
371.23M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 950
Total Value: $19,689,924,624
Total Shares: 279,114,399
Showing 1–100 of 957 holdings by value · page 1 of 10

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 950 13F filers · Δ vs Mar 31, 2026
Top Holder
21.1%
Sep 2023 → Jun 2026 · range 13.5% – 21.1%
−0.0 pts
Top 5
45.9%
Sep 2023 → Jun 2026 · range 39.3% – 48.3%
−0.7 pts
Top 10
57.4%
Sep 2023 → Jun 2026 · range 51.8% – 59.6%
−1.9 pts
HHI
654
Sep 2023 → Jun 2026 · range 427 – 670
Broadly held−16

Quarterly Activity

vs Mar 31, 2026
New
119
Increased
335
Decreased
330
Sold Out
97
Unchanged
166
Holder count: +22
Institutional value: +6.4%
Shares held: -0.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 957
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 11544 CUSIP 084423102 13F (30d) 644 filings 602 filers Visit website Investor relations