WR BERKLEY CORP (WRB) Institutional Shareholders
WR BERKLEY CORP (WRB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $18.09B in WRB holdings during the latest filing period.
Mitsui Sumitomo Insurance Co Ltd is currently the largest disclosed institutional shareholder of WRB tracked by InsiderSet, reporting ownership valued at approximately $3.90B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $4.26B, representing an estimated gain of +9.44% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% of the total disclosed WRB value among the investors covered in this analysis. Major shareholders include Mitsui Sumitomo Insurance Co Ltd, Blackrock, Inc., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in WR BERKLEY CORP (WRB).
This page ranks the largest institutional WRB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
921
Total Reported Value
$18.09B
Largest Holder
Mitsui Sumitomo Insurance Co Ltd
Largest Position
$3.90B
Insider Transactions (90d)
10
Latest Filing Quarter
Q2 2026
New Institutional Positions
44
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Mitsui Sumitomo Insurance Co Ltd | 100.00% | 58,780,450 | $3,895,968,226 | $4,263,933,843 | +$367,965,617 | +9.44% | |
| Blackrock, Inc. | 0.03% | 23,280,608 | $1,543,038,699 | $1,688,775,304 | +$145,736,605 | +9.44% | |
| Vanguard Capital Management Llc | 0.03% | 18,925,841 | $1,254,404,742 | $1,372,880,506 | +$118,475,764 | +9.44% | |
| Vanguard Portfolio Management Llc | 0.05% | 14,750,233 | $977,645,443 | $1,069,981,902 | +$92,336,459 | +9.44% | |
| State Street Corp | 0.03% | 14,405,410 | $954,790,575 | $1,044,968,441 | +$90,177,866 | +9.44% | |
| Morgan Stanley | 0.04% | 10,412,465 | $690,138,328 | $755,320,211 | +$65,181,883 | +9.44% | |
| Geode Capital Management, Llc | 0.03% | 8,229,654 | $549,199,148 | $596,979,101 | +$47,779,953 | +8.70% | |
| Kayne Anderson Rudnick Investment Management Llc | 1.51% | 7,772,213 | $515,142,340 | $563,796,331 | +$48,653,991 | +9.44% | |
| Invesco Ltd. | 0.05% | 5,051,765 | $334,830,954 | $366,455,033 | +$31,624,079 | +9.44% | |
| First Trust Advisors Lp | 0.19% | 3,972,929 | $263,325,756 | $288,196,270 | +$24,870,514 | +9.44% | |
| Wells Fargo & Company/Mn | 0.05% | 3,789,666 | $251,179,062 | $274,902,372 | +$23,723,310 | +9.44% | |
| Dimensional Fund Advisors Lp | 0.05% | 3,768,180 | $249,757,104 | $273,343,777 | +$23,586,673 | +9.44% | |
| Ubs Group Ag | 0.04% | 3,267,776 | $216,588,194 | $237,044,471 | +$20,456,277 | +9.44% | |
| Bank Of America Corp | 0.01% | 2,904,522 | $192,511,710 | $210,694,026 | +$18,182,316 | +9.44% | |
| Goldman Sachs Group Inc | 0.02% | 2,851,284 | $188,983,115 | $206,832,141 | +$17,849,026 | +9.44% | |
| Northern Trust Corp | 0.02% | 2,705,395 | $179,313,581 | $196,249,353 | +$16,935,772 | +9.44% | |
| Janus Henderson Group Plc | 0.08% | 2,457,890 | $162,909,996 | $178,295,341 | +$15,385,345 | +9.44% | |
| 1832 Asset Management L.P. | 0.20% | 2,293,921 | $152,041,084 | $166,401,029 | +$14,359,945 | +9.44% | |
| Royal London Asset Management Ltd | 0.32% | 2,284,583 | $151,422,161 | $165,723,651 | +$14,301,490 | +9.44% | |
| Polar Capital Holdings Plc | 0.66% | 2,275,000 | $150,787,000 | $165,028,500 | +$14,241,500 | +9.44% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.03% | 2,175,492 | $144,191,609 | $157,810,190 | +$13,618,581 | +9.44% | |
| Bank Of New York Mellon Corp | 0.02% | 2,033,932 | $134,808,977 | $147,541,427 | +$12,732,450 | +9.44% | |
| Principal Financial Group Inc | 0.07% | 1,918,380 | $127,152,820 | $139,159,285 | +$12,006,465 | +9.44% | |
| Charles Schwab Investment Management Inc | 0.02% | 1,901,305 | $126,018,496 | $137,920,665 | +$11,902,169 | +9.44% | |
| Legal & General Group Plc | 0.03% | 1,871,044 | $124,012,800 | $135,725,532 | +$11,712,732 | +9.44% | |
| Aqr Capital Management Llc | 0.06% | 1,848,090 | $122,491,425 | $134,060,449 | +$11,569,024 | +9.44% | |
| Vanguard Fiduciary Trust Co | 0.03% | 1,658,869 | $109,949,837 | $120,334,357 | +$10,384,520 | +9.44% | |
| Madison Asset Management, Llc | 1.33% | 1,618,906 | $107,301,062 | $117,435,441 | +$10,134,379 | +9.44% | |
| Storebrand Asset Management As | 0.03% | 1,508,693 | $100,197,563 | $109,440,590 | +$9,243,027 | +9.22% | |
| Citadel Advisors Llc | 0.07% | 1,394,141 | $92,403,665 | $101,130,988 | +$8,727,323 | +9.44% | |
| Fmr Llc | 0.00% | 1,389,362 | $92,086,925 | $100,784,319 | +$8,697,394 | +9.44% | |
| Chilton Investment Co Inc. | 2.16% | 1,388,792 | $92,049,134 | $100,742,972 | +$8,693,838 | +9.44% | |
| Royal Bank Of Canada | 0.02% | 1,296,875 | $85,956,000 | $94,075,313 | +$8,119,313 | +9.45% | |
| Barclays Plc | 0.03% | 1,227,343 | $81,348,294 | $89,031,461 | +$7,683,167 | +9.44% | |
| Deutsche Bank Ag\ | 0.03% | 1,144,757 | $75,874,494 | $83,040,673 | +$7,166,179 | +9.44% | |
| Anchor Capital Advisors Llc | 2.14% | 1,133,890 | $75,154,251 | $82,252,381 | +$7,098,130 | +9.44% | |
| Jones Financial Companies Lllp | 0.04% | 1,147,307 | $74,277,837 | $83,225,650 | +$8,947,813 | +12.05% | |
| Hsbc Holdings Plc | 0.04% | 1,103,332 | $73,181,319 | $80,035,703 | +$6,854,384 | +9.37% | |
| Raymond James Financial Inc | 0.02% | 1,100,375 | $72,932,797 | $79,821,203 | +$6,888,406 | +9.44% | |
| Confluence Investment Management Llc | 1.14% | 1,031,752 | $72,769,459 | $74,843,290 | +$2,073,831 | +2.85% | |
| Cornerstone Investment Partners, Llc | 2.93% | 1,052,504 | $69,759,965 | $76,348,640 | +$6,588,675 | +9.44% | |
| Jane Street Group, Llc | 0.07% | 1,014,135 | $67,216,868 | $73,565,353 | +$6,348,485 | +9.44% | |
| Eulav Asset Management | 2.04% | 906,464 | $63,932,906 | $65,754,899 | +$1,821,993 | +2.85% | |
| Envestnet Asset Management Inc | 0.01% | 830,557 | $58,579,174 | $60,248,605 | +$1,669,431 | +2.85% | |
| Parnassus Endeavor Fund | Parnassus Investments | 0.15% | 779,771 | $54,997,249 | $56,564,588 | +$1,567,339 | +2.85% |
| Arrowstreet Capital, Limited Partnership | 0.03% | 803,150 | $53,232,782 | $58,260,501 | +$5,027,719 | +9.44% | |
| Pfa Pension, Forsikringsaktieselskab | 0.16% | 791,287 | $52,446,510 | $57,399,959 | +$4,953,449 | +9.44% | |
| Cerity Partners Llc | 0.07% | 775,409 | $51,394,125 | $56,248,169 | +$4,854,044 | +9.44% | |
| Citigroup Inc | 0.02% | 709,852 | $50,065,858 | $51,492,664 | +$1,426,806 | +2.85% | |
| Swiss National Bank | 0.03% | 724,962 | $48,050,481 | $52,588,743 | +$4,538,262 | +9.44% |
Frequently asked questions about WRB
Who owns the most WRB stock?
The largest holders of WRB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for WR BERKLEY CORP (WRB).
Is WRB widely held by superinvestors?
Many widely followed stocks like WRB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly WRB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.