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Of the 11 tracked institutions holding WRB, 5 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +2.1pt. It's a gauge of who owns the name, not just how many.
Among the 11 tracked institutional investors we monitor, WRB (BERKLEY W R CORP) is held with a combined value of $5.48B across 80,482,591 shares. The largest holder is VANGUARD GROUP INC with a position worth $2.60B (0.04% of their portfolio). WELLINGTON MANAGEMENT GROUP LLP opened a new position in the most recent quarter. 5 funds increased their holdings. 4 funds reduced their position.
Total Institutional Value
$5.48B
Total Shares Held
80,482,591
Institutional Holders
11
% of Shares Outstanding
21.6%
of 372.28M shares · SEC 2026-04-27
Days to Cover
7.9-5.0%
17.84M shares short · FINRA 2026-06-30
Tracked 13F institutions hold 21.6% of WRB's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-27), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $2.60B | 0.04% | +0.8% |
| 2 | BlackRock, Inc. | $1.54B | 0.03% | -7.1% |
| 3 | STATE STREET CORP | $954.79M | 0.03% | -3.4% |
| 4 | AQR CAPITAL MANAGEMENT LLC | $122.49M | 0.06% | +6.9% |
| 5 | CITADEL ADVISORS LLC | $92.40M | 0.07% | +1142.0% |
| 6 | FMR LLC | $92.09M | 0.00% | +9.4% |
| 7 | MILLENNIUM MANAGEMENT LLC | $30.44M | 0.01% | +1203.2% |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ | $28.05M | 0.00% | -1.2% |
| 9 | Gotham Asset Management, LLC | $11.08M | 0.03% | -40.6% |
| 10 | MARKEL GROUP INC. | $4.03M | 0.03% | - |
| Member | Type | Date |
|---|---|---|
| Gilbert Cisneros | Sell | Jun 5, 2026 |
| Gilbert Cisneros | Sell | May 29, 2026 |
| Gilbert Cisneros | Sell | May 19, 2026 |
| Gilbert Cisneros | Sell |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of WRB with a position worth $2.60B, representing 0.04% of their portfolio. In total, 11 institutional investors hold WRB with a combined value of $5.48B.
In the most recent quarter, 1 fund opened a new position in WRB. Additionally, 5 increased their holdings and 4 reduced their positions.
Institutional investors hold $5.48B worth of WRB stock across 11 positions. The largest institutional holder is VANGUARD GROUP INC with $2.60B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For WRB, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their WRB positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| May 14, 2026 |
| Gilbert Cisneros | Sell | May 13, 2026 |
| Gilbert Cisneros | Sell | May 12, 2026 |
| Gilbert Cisneros | Sell | May 7, 2026 |
| Gilbert Cisneros | Sell | Mar 18, 2026 |
Showing 8 of 20. STOCK Act disclosures lag up to 45 days.
Last Close
$75.46
2026-07-24
YTD
+8.8%
80% of 52-week range
