What is CUSIP 084423102?

CUSIP 084423102 is the security identifier used in SEC filing datasets for WRB - BERKLEY W R CORP - Common Stock.

Who owns WRB - BERKLEY W R CORP - Common Stock based on 13F filings?

917 institutions reported positions in WRB - BERKLEY W R CORP - Common Stock as of Q1 2026. Open the latest holders period and ownership history tables on this page for position-level details.

Security Snapshot

BERKLEY W R CORP - Common Stock (WRB) Institutional Ownership

CUSIP: 084423102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

917

Shares (Excl. Options)

278,905,296

Price

$66.28

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Security type / class: Equity / Common Stock
Symbol: WRB on NYSE
All holders as of 31 Mar 2026: Q1 2026
Total 13F shares: 278,905,296
Total 13F value: $18,486,488,478
Portfolio coverage rank: 0.03%
Share change: -4,899,697
Value change: -$357,143,425
Number of holders: 917
Shares outstanding: 374,703,483
SEC-reported price per share: $65.43
Insider filing price: $65.43

13F Shares, Excluding Options vs Price

13F Value, Excluding Options

Total Investors

Key facts

WRB - BERKLEY W R CORP - Common Stock is tracked under CUSIP 084423102.
917 institutions reported positions in Q1 2026.
3 significant owners is listed from Schedule 13D/13G reporting.

Change

Holder count moved from 942 to 917 between Q4 2025 and Q1 2026.
SEC-reported value moved from $19,934,242,664 to $18,486,488,478.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 917 institutions filings for Q1 2026.

Open SEC evidence

Security key

084423102

Latest holder period

Q1 2026

13F holders

917

13D/G owners

CIK / CUSIP context first

Open Q1 2026 holders WRB full holder history BERKLEY W R CORP SEC filings BERKLEY W R CORP company facts BERKLEY W R CORP insider transactions BERKLEY W R CORP 13D/G history

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 084423102:

Q1 2026 (917 holders) Q4 2025 (942 holders) Q3 2025 (918 holders) Q2 2025 (910 holders) Q1 2025 (901 holders) Q4 2024 (863 holders) Q3 2024 (782 holders) Q2 2024 (715 holders) Q1 2024 (753 holders) Q4 2023 (719 holders)

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows

Security

WRB

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
BERKLEY WILLIAM R	26%	+1.5%	$6,835,728,842		95,551,144	0%	William R. Berkley	04 Mar 2026
MITSUI SUMITOMO INSURANCE CO LTD	16%	+5.3%	$4,205,153,393	+$166,101,143	58,780,450	+4.1%	Mitsui Sumitomo Insurance Co., Ltd.	04 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	5.8%		$1,440,450,117		21,732,802		Vanguard Capital Management	31 Mar 2026

As of 31 Mar 2026, 917 institutional investors reported holding 278,905,296 shares of BERKLEY W R CORP - Common Stock (WRB). This represents 74% of the company’s total 374,703,483 outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share

55%

Institution	Ownership %	Shares Held	Share Change %	Portfolio %	Holdings Value
Mitsui Sumitomo Insurance Co Ltd	16%	58,780,450	+16%	100%	$3,895,968,226
BlackRock, Inc.	6.2%	23,280,608	-7.1%	0.03%	$1,543,038,699
VANGUARD CAPITAL MANAGEMENT LLC	5.1%	18,925,841	0%	0.03%	$1,254,404,742
VANGUARD PORTFOLIO MANAGEMENT LLC	3.9%	14,750,233	0%	0.05%	$977,645,443
STATE STREET CORP	3.8%	14,405,410	-3.4%	0.03%	$954,790,575
MORGAN STANLEY	2.8%	10,412,465	+6.3%	0.04%	$690,138,328
GEODE CAPITAL MANAGEMENT, LLC	2.2%	8,229,654	-1.4%	0.03%	$549,199,148
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	2.1%	7,772,213	-11%	1.5%	$515,142,340
Invesco Ltd.	1.3%	5,051,765	+2.8%	0.05%	$334,830,954
FIRST TRUST ADVISORS LP	1.1%	3,972,929	+11%	0.19%	$263,325,756
WELLS FARGO & COMPANY/MN	1%	3,789,666	-5%	0.05%	$251,179,062
DIMENSIONAL FUND ADVISORS LP	1%	3,768,180	+3.6%	0.05%	$249,757,104
JPMORGAN CHASE & CO	0.87%	3,273,964	+11%	0.01%	$216,900,198
UBS Group AG	0.87%	3,267,776	-6.8%	0.04%	$216,588,194
BANK OF AMERICA CORP /DE/	0.78%	2,904,522	+23%	0.01%	$192,511,710
GOLDMAN SACHS GROUP INC	0.76%	2,851,284	+3.5%	0.02%	$188,983,115
NORTHERN TRUST CORP	0.72%	2,705,395	-6.3%	0.02%	$179,313,581
JANUS HENDERSON GROUP PLC	0.66%	2,457,890	-31%	0.08%	$162,909,996
1832 Asset Management L.P.	0.61%	2,293,921	-1.3%	0.2%	$152,041,084
ROYAL LONDON ASSET MANAGEMENT LTD	0.61%	2,284,583	-18%	0.32%	$151,422,161
Polar Capital Holdings Plc	0.61%	2,275,000	-7%	0.66%	$150,787,000
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0.58%	2,175,492	-2%	0.03%	$144,191,609
Bank of New York Mellon Corp	0.54%	2,033,932	-7.6%	0.02%	$134,808,977
PRINCIPAL FINANCIAL GROUP INC	0.51%	1,918,380	-29%	0.07%	$127,152,820
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.51%	1,901,305	+1.3%	0.02%	$126,018,496

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods

Latest

Q1 2026

Rows shown

1-25 of 49

Period	13F Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2026 Q1	278,905,296	$18,486,488,478	-$357,143,425	$4,765,532	$10,432,472	$66.28	917
2025 Q4	284,305,181	$19,934,242,664	-$892,658,557	$7,741,248	$14,297,468	$70.12	942
2025 Q3	244,318,417	$18,710,993,140	-$716,027,191	$2,988,180	$21,393,906	$76.62	918
2025 Q2	254,536,404	$18,686,757,069	-$149,116,870	$5,899,089	$11,284,992	$73.47	910
2025 Q1	257,292,485	$18,301,513,349	-$84,423,696	$7,280,238	$15,690,780	$71.16	901
2024 Q4	261,201,054	$15,282,336,353	+$11,840,798	$6,141,674	$10,050,810	$58.52	863
2024 Q3	257,666,567	$14,610,619,816	+$4,069,018,248	$8,768,720	$12,083,688	$56.73	782
2024 Q2	172,270,942	$13,523,820,184	-$183,054,042	$6,993,620	$49,261,802	$78.58	715
2024 Q1	177,792,698	$15,696,135,878	+$89,117,991	$19,067,664	$12,231,252	$88.44	753
2023 Q4	177,087,428	$12,509,528,867	+$187,304,817	$7,475,104	$5,374,720	$70.72	719
2023 Q3	173,557,239	$11,026,700,461	-$7,776,725	$3,828,447	$2,736,419	$63.49	660
2023 Q2	173,712,681	$10,338,961,461	-$401,727,413	$3,966,696	$3,103,076	$59.56	649
2023 Q1	179,596,816	$11,171,670,237	-$108,727,332	$3,036,728	$2,195,760	$62.26	680
2022 Q4	181,858,021	$13,197,305,485	+$462,921,439	$2,365,782	$3,962,103	$72.57	709
2022 Q3	184,861,142	$11,946,372,437	+$116,018,039	$1,217,000	$2,174,000	$64.58	656
2022 Q2	183,998,325	$12,556,999,643	+$208,361,780	$3,903,204	$2,498,000	$68.26	653
2022 Q1	180,465,440	$11,997,872,310	+$3,856,834,018	$2,381,000	$3,401,000	$66.59	597
2021 Q4	122,708,960	$10,095,755,740	-$65,790,203	$5,026,000	$2,661,000	$82.39	561
2021 Q3	123,728,672	$9,035,613,890	+$30,234,247	$4,420,000	$3,030,000	$73.18	506
2021 Q2	123,322,540	$9,159,195,144	-$100,678,097	$2,285,000	$4,176,000	$74.43	515
2021 Q1	124,457,759	$9,355,454,258	+$113,697,159	$1,635,000	$4,340,000	$75.35	500
2020 Q4	123,309,741	$8,165,386,468	-$330,974,620	$2,710,000	$1,474,000	$66.42	492
2020 Q3	128,501,461	$7,813,326,104	+$47,050,425	$2,030,000	$2,329,000	$61.15	443
2020 Q2	127,562,691	$7,287,804,384	-$114,624,014	$4,990,000	$2,698,000	$57.29	441
2020 Q1	129,817,720	$6,774,675,699	-$25,072,607	$4,603,000	$1,964,000	$52.17	431