WRB W. R. Berkley Corporation
W. R. Berkley Corporation (WRB) Institutional Ownership
What the institutions did with WRB last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Mitsui Sumitomo Insurance Co Ltd | 58.8M | 21.0% |
| BlackRock, Inc. | 21.9M | 7.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 18.7M | 6.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 14.6M | 5.2% |
| STATE STREET CORP | 14.1M | 5.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 8.3M | 3.0% |
| MORGAN STANLEY | 8.3M | 2.9% |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 6.4M | 2.3% |
| Invesco Ltd. | 5.0M | 1.8% |
| GOLDMAN SACHS GROUP INC | 4.2M | 1.5% |
| DIMENSIONAL FUND ADVISORS LP | 4.0M | 1.4% |
| WELLS FARGO & COMPANY/MN | 3.7M | 1.3% |
| AQR CAPITAL MANAGEMENT LLC | 3.7M | 1.3% |
| FIRST TRUST ADVISORS LP | 3.6M | 1.3% |
| NORGES BANK | 3.1M | 1.1% |
| BANK OF AMERICA CORP /DE/ | 2.8M | 1.0% |
| UBS Group AG | 2.8M | 1.0% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.6M | 0.9% |
| NORTHERN TRUST CORP | 2.6M | 0.9% |
| 1832 Asset Management L.P. | 2.3M | 0.8% |
| JPMORGAN CHASE & CO | 2.2M | 0.8% |
| Polar Capital Holdings Plc | 2.1M | 0.8% |
| ROYAL LONDON ASSET MANAGEMENT LTD | 2.1M | 0.8% |
| ANCHOR CAPITAL ADVISORS LLC | 2.1M | 0.7% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 2.0M | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| MORGAN STANLEY | Reduced | 10.4M | 8.3M | -2.2M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 1.8M | 3.7M | +1.8M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 803.2K | 2.6M | +1.8M |
| TWO SIGMA INVESTMENTS, LP | Increased | 273.0K | 2.0M | +1.7M |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | Reduced | 7.8M | 6.4M | -1.4M |
| BlackRock, Inc. | Reduced | 23.3M | 21.9M | -1.3M |
| GOLDMAN SACHS GROUP INC | Increased | 2.9M | 4.2M | +1.3M |
| JPMORGAN CHASE & CO | Reduced | 3.3M | 2.2M | -1.1M |
| ANCHOR CAPITAL ADVISORS LLC | Increased | 1.1M | 2.1M | +936.8K |
| Bristol Gate Capital Partners Inc. | New | 0 | 918.0K | +918.0K |
| PFA Pension, Forsikringsaktieselskab | Reduced | 791.3K | 2.1K | -789.1K |
| Squarepoint Ops LLC | Increased | 53.6K | 751.3K | +697.6K |
| Bank of New York Mellon Corp | Reduced | 2.0M | 1.3M | -686.4K |
| BloombergSen Inc. | Reduced | 657.3K | 88.9K | -568.3K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Increased | 18.7K | 561.6K | +542.9K |
| Maren Capital LLC | Sold Out | 504.6K | 0 | -504.6K |
| MILLENNIUM MANAGEMENT LLC | Increased | 459.2K | 936.2K | +477.0K |
| PRINCIPAL FINANCIAL GROUP INC | Reduced | 1.9M | 1.5M | -457.0K |
| CANADA PENSION PLAN INVESTMENT BOARD | New | 0 | 432.6K | +432.6K |
| UBS Group AG | Reduced | 3.3M | 2.8M | -432.5K |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 582.2K | 969.4K | +387.2K |
| FIRST TRUST ADVISORS LP | Reduced | 4.0M | 3.6M | -348.1K |
| EULAV Asset Management | Reduced | 1.2M | 906.5K | -324.0K |
| Wallington Asset Management, LLC | Sold Out | 308.4K | 0 | -308.4K |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC | New | 0 | 308.0K | +308.0K |
| Cornerstone Investment Partners, LLC | Increased | 1.1M | 1.3M | +283.6K |
| CIBC Asset Management Inc | Increased | 84.7K | 367.9K | +283.2K |
| STATE STREET CORP | Reduced | 14.4M | 14.1M | -278.8K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 3.8M | 4.0M | +273.7K |
| Legal & General Group Plc | Reduced | 1.9M | 1.6M | -271.5K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Increased | 110.9K | 377.8K | +267.0K |
| CREDIT AGRICOLE S A | Increased | 51.3K | 315.5K | +264.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 18.9M | 18.7M | -234.9K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Increased | 192.1K | 411.6K | +219.5K |
| BARCLAYS PLC | Increased | 1.2M | 1.4M | +213.1K |
| SG Americas Securities, LLC | Reduced | 425.1K | 218.1K | -207.0K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 14.8M | 14.6M | -199.3K |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | Increased | 180.7K | 358.7K | +178.1K |
| HRT FINANCIAL LP | Sold Out | 176.6K | 0 | -176.6K |
| ROYAL LONDON ASSET MANAGEMENT LTD | Reduced | 2.3M | 2.1M | -169.3K |
| DEUTSCHE BANK AG\ | Increased | 1.1M | 1.3M | +160.9K |
| Aware Super Pty Ltd as trustee of Aware Super | Reduced | 364.9K | 206.6K | -158.4K |
| Qube Research & Technologies Ltd | Sold Out | 154.0K | 0 | -154.0K |
| NORTHERN TRUST CORP | Reduced | 2.7M | 2.6M | -152.7K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Increased | 499.8K | 652.0K | +152.1K |
| Polar Capital Holdings Plc | Reduced | 2.3M | 2.1M | -145.0K |
| TUDOR INVESTMENT CORP ET AL | Increased | 426.3K | 571.2K | +144.9K |
| JANE STREET GROUP, LLC | Reduced | 1.0M | 875.7K | -138.4K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 2.2M | 2.0M | -133.9K |
| Quantbot Technologies LP | Reduced | 172.5K | 44.1K | -128.3K |
| Quantinno Capital Management LP | Increased | 263.2K | 389.9K | +126.7K |
| Madison Asset Management, LLC | Reduced | 1.6M | 1.5M | -121.1K |
| Tredje AP-fonden | Sold Out | 119.7K | 0 | -119.7K |
| Swiss National Bank | Reduced | 725.0K | 607.3K | -117.7K |
| NATIXIS ADVISORS, LLC | Increased | 1.3M | 1.5M | +117.5K |
| Trexquant Investment LP | Reduced | 169.3K | 56.6K | -112.7K |
| JONES FINANCIAL COMPANIES LLLP | Increased | 1.1M | 1.3M | +112.1K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 1.1M | 993.0K | -107.3K |
| MARSHALL WACE, LLP | Increased | 31.6K | 136.3K | +104.7K |
| TRUIST FINANCIAL CORP | Reduced | 572.2K | 468.9K | -103.3K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.