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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
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 1 May 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 7 listed it in both
Shares listed
16,839,327
combined, among listed positions
Reported value
$1.1bn
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: 15 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +2,431,194.

Managers listing WRB in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, 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 Ltd5,051,765$335munder 0.1%Added+138,42812 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd2,457,890$163m0.08%Trimmed-1,099,91718 May 2026 (the filing on sec.gov)
AQR Capital Management LLC1,848,105$122m0.06%Added+119,06415 May 2026 (the filing on sec.gov)
Citadel Advisors LLC1,394,141$92munder 0.1%Added+1,281,89115 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)1,389,362$92munder 0.1%Added+119,82915 May 2026 (the filing on sec.gov)
Jane Street Group LLC1,014,135$67munder 0.1%Added+997,08812 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP803,150$53munder 0.1%Trimmed-235,72714 May 2026 (the filing on sec.gov)
Millennium Management LLC459,227$30munder 0.1%Added+423,98815 May 2026 (the filing on sec.gov)
Tudor Investment Corp426,345$28m0.05%Added+351,33015 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc423,154$28munder 0.1%Trimmed-5,09215 May 2026 (the filing on sec.gov)
AllianceBernstein LP292,875$21munder 0.1%Trimmed-34,48915 May 2026 (the filing on sec.gov)
Two Sigma Investments LP272,989$18munder 0.1%Added+246,43615 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.200,813$13munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Quantbot Technologies LP172,464$11m0.47%Added+161,32013 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP116,526$7.7munder 0.1%Added+86,00115 May 2026 (the filing on sec.gov)
GAMCO Investors Inc91,219$6.0m0.06%Trimmed-1,33614 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC68,643$4.5munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Man Group PLC63,710$4.2munder 0.1%Trimmed-39,26015 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP60,832$4.0munder 0.1%Trimmed-237,53114 May 2026 (the filing on sec.gov)
Markel Group Inc60,750$4.0munder 0.1%Held01 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC53,642$3.6munder 0.1%Trimmed-85,54515 May 2026 (the filing on sec.gov)
Marshall Wace LLP31,635$2.1munder 0.1%Added+27,40215 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC28,590$1.9munder 0.1%Trimmed-7,51627 Oct 2026 (the filing on sec.gov)
Wellington Management Group LLP21,127$1.4munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC13,607$902kunder 0.1%Trimmed-4,76415 May 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q4 2025 to Q1 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 (3)

Exited (2)

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 →