W. R. Berkley Corporation (WRB) Insider Trading

Over the last 6 months, 599 institutions increased and 780 reduced their position (13F).

Insider Activity

Sentiment
50/100
Buys (3m)
0
Sells (3m)
0
Net (3m)
$0
Insider trades by month Buys Sells
Aug
Sep
Dec
Jan
Feb
Mar
Context3-month price -7.2%Institutions reducing (13F)
DateInsiderTypeSharesPrice
Jun 4, 2026Farrell Mary CdirectorGrant3,090—
Jun 4, 2026Mosley Daniel LynndirectorGrant3,090—
Jun 4, 2026BLAYLOCK RONALD EdirectorGrant3,090—
Jun 4, 2026Rusbuldt Robert AlandirectorGrant3,090—
Jun 4, 2026Talisman JonathandirectorGrant3,090—
Jun 4, 2026BERKLEY WILLIAM Rdirector, 10 percent owner, officer: Executive ChairmanGrant3,090—
Jun 4, 2026Augostini Christopher LdirectorGrant3,090—
Jun 4, 2026Mattson Marie AngeladirectorGrant3,090—
Jun 4, 2026BERKLEY WILLIAM R JRdirector, officer: President and CEOGrant3,090—
Jun 4, 2026Ferre Maria LuisadirectorGrant3,090—
Mar 3, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy73,185$72.52
Mar 3, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy100,897$73.20
Mar 3, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy45,103$72.29
Mar 3, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy38,991$71.60
Feb 27, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy145,491$71.65
Feb 27, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy7,509$72.11
Feb 27, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy147,000$71.63
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy154,512$71.39
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy203,590$71.09
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy61,594$71.28
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy103,192$70.52
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy16,410$71.80
Feb 25, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy14,356$71.77
Feb 20, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy160,582$70.80
Feb 20, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy300,986$70.53
Feb 20, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy44,014$71.50
Feb 18, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy45,250$70.96
Feb 18, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy281,386$71.19
Feb 18, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy239,750$70.58
Feb 13, 2026MITSUI SUMITOMO INSURANCE CO LTD10 percent ownerBuy280$71.18

Source: WRB SEC Form 4 filings, latest Jun 4, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their WRB positions over the last 6 months (SEC Form 13F).

Increased
599
New positions
204
Reduced
780
Sold out
208
Largest moves
InstitutionActionSharesFiled
MITSUI SUMITOMO INSURANCE CO LTDIncreased58.8MMay 14, 2026
MITSUI SUMITOMO INSURANCE CO LTDNew Position50.5MFeb 17, 2026
VANGUARD GROUP INCIncreased37.0MJan 29, 2026
BLACKROCK, INC.Increased25.1MFeb 12, 2026
BLACKROCK, INC.Reduced23.3MMay 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position18.9MMay 15, 2026
STATE STREET CORPReduced14.9MFeb 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position14.8MMay 8, 2026
STATE STREET CORPReduced14.4MMay 15, 2026
MORGAN STANLEYIncreased10.4MMay 15, 2026
MORGAN STANLEYReduced9.8MFeb 13, 2026
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLCReduced8.7MFeb 13, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased8.3MFeb 9, 2026
GEODE CAPITAL MANAGEMENT, LLCReduced8.2MMay 15, 2026
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLCReduced7.8MMay 14, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.

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