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WRB in the 13F filings

Berkley W R Corp · CUSIP 084423102

Sector · InsuranceTheme · Financial services· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 31 Jul 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 8 listed it in both
Shares listed
21,140,117
combined, among listed positions
Reported value
$1.5bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 16 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +4,300,790.

Managers listing WRB in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Invesco Ltd5,028,284$355munder 0.1%Trimmed-23,48114 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC3,680,160$260m0.09%Added+1,832,05514 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP2,588,583$183m0.08%Added+1,785,43313 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP2,013,358$142m0.10%Added+1,740,36914 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC1,475,954$104munder 0.1%Added+81,8132 Sep 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,446,808$102munder 0.1%Added+57,44613 Aug 2026 (the filing on sec.gov)
Millennium Management LLC936,192$66munder 0.1%Added+476,96514 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC875,704$62munder 0.1%Trimmed-138,43114 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC751,280$53m0.06%Added+697,63814 Aug 2026 (the filing on sec.gov)
Tudor Investment Corp571,238$40m0.06%Added+144,89314 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc420,968$30munder 0.1%Trimmed-2,18614 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.290,364$20munder 0.1%Added+89,55114 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP288,882$19munder 0.1%Trimmed-3,99314 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP168,196$12munder 0.1%Added+51,67014 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP136,322$9.6munder 0.1%Added+104,68713 Aug 2026 (the filing on sec.gov)
GAMCO Investors Inc90,834$6.4m0.06%Trimmed-38512 Aug 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP74,365$5.2munder 0.1%Added+13,53314 Aug 2026 (the filing on sec.gov)
Markel Group Inc60,750$4.3munder 0.1%Held031 Jul 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP48,962$3.5munder 0.1%Added+38,48914 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP44,134$3.1m0.12%Trimmed-128,33012 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC32,238$2.3munder 0.1%Added+3,64827 Oct 2026 (the filing on sec.gov)
Janus Henderson Group Ltd29,934$2.1munder 0.1%Trimmed-2,427,95614 Aug 2026 (the filing on sec.gov)
Man Group PLC23,713$1.7munder 0.1%Trimmed-39,99714 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP19,290$1.4munder 0.1%Trimmed-1,83714 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP13,499$952kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (1)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
9 in Q3 2024 to 11 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
WRB by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20138$517mn.a.n.a.
Q3 20134$490mn.a.n.a.
Q4 20136$484mn.a.n.a.
Q1 20145$467mn.a.n.a.
Q2 20146$518mn.a.n.a.
Q3 20144$472mn.a.n.a.
Q4 20147$509mn.a.n.a.
Q1 20153$478mn.a.n.a.
Q2 20153$485mn.a.n.a.
Q3 20158$611mn.a.n.a.
Q4 20157$594mn.a.n.a.
Q1 20167$598mn.a.n.a.
Q2 20165$508mn.a.n.a.
Q3 20163$440mn.a.n.a.
Q4 20166$571mn.a.n.a.
Q1 20176$661mn.a.n.a.
Q2 20179$651mn.a.n.a.
Q3 20178$548mn.a.n.a.
Q4 201710$817mn.a.n.a.
Q1 201811$879mn.a.n.a.
Q2 20187$851mn.a.n.a.
Q3 20188$1.1bnn.a.n.a.
Q4 201810$1.1bnn.a.n.a.
Q1 201910$1.2bnn.a.n.a.
Q2 201911$1.3bnn.a.n.a.
Q3 201915$1.4bnn.a.n.a.
Q4 201912$1.4bnn.a.n.a.
Q1 202014$1.0bnn.a.n.a.
Q2 202013$1.1bnn.a.n.a.
Q3 20209$948mn.a.n.a.
Q4 202015$1.2bnn.a.n.a.
Q1 20218$1.1bnn.a.n.a.
Q2 202113$1.2bnn.a.n.a.
Q3 202116$1.2bnn.a.n.a.
Q4 202115$1.3bnn.a.n.a.
Q1 202213$1.7bnn.a.n.a.
Q2 202217$1.8bnn.a.n.a.
Q3 202219$1.6bnn.a.n.a.
Q4 202217$1.5bnn.a.n.a.
Q1 202321$1.4bnn.a.n.a.
Q2 202320$906mn.a.n.a.
Q3 202311$713mn.a.n.a.
Q4 20237$692m16
Q1 202410$1.1bn63
Q2 20249$1.0bn73
Q3 20249$806m91
Q4 202410$1.0bn45
Q1 202510$1.3bn55
Q2 202510$1.2bn64
Q3 202510$1.2bn37
Q4 20257$820m1518
Q1 20268$723m1514
Q2 202611$1.1bn1612

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

WRB and V →WRB and AXP →WRB and BAC →Choose a stock to compare with WRB →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own WRB, latest filings →Back to the 13F Explorer →