MARKET_TICKER: WRB

BERKLEY W R CORPInsider Trading & SEC Form 4 Analysis

Institutional analysis of internal capital flows based on SEC Form 4 filings.

Executive Sentiment

BULLISH

SOURCE: EDGAR_SYSTEMSTATUS: VERIFIED

Automated_Intelligence_Report :: WRB

Algorithmic analysis of recent insider trading activity for WRB reveals a bullish posture among the C-suite and board members. Based on the latest SEC Form 4 filings, we have tracked capital events executed by 4 distinct corporate insiders. The aggregate nominal exposure during this reporting cycle reached $705.56M.

Market dynamics show a positive net capital flow of $705.46M when isolating open-market purchases versus open-market sales. The trading volume is heavily weighted towards open-market executions, providing a clearer signal of insider conviction regarding current valuation levels compared to option-based equity grants.

From a microstructural perspective, the most notable capital injection was executed by MITSUI SUMITOMO INSURANCE CO LTD (Officer/Other), signaling strong internal support. Continuous monitoring of these Tier-1 actors is essential, as their liquidity decisions often precede material corporate events or reflect an informed, asymmetric perspective on the future performance of WRB.

Volume_30D

$705.56M

USD NOMINAL VALUE

Active_Insiders

UNIQUE C-SUITE ENTITIES

Last_Entry

2026.03.03

ISO_8601 FORMAT

INITIALIZING_CHART_ENGINE...

Entity / Timeline	Methodology	Position	Net Value
MITSUI SUMITOMO INSURANCE CO LTD2026.03.03	ACQUISITION	38,991	$2,791,603.54
MITSUI SUMITOMO INSURANCE CO LTD2026.03.03	ACQUISITION	73,185	$5,307,654.3
MITSUI SUMITOMO INSURANCE CO LTD2026.03.02	ACQUISITION	45,103	$3,260,288.4
MITSUI SUMITOMO INSURANCE CO LTD2026.03.02	ACQUISITION	100,897	$7,385,458.61
MITSUI SUMITOMO INSURANCE CO LTD2026.02.27	ACQUISITION	147,000	$10,528,963.2
MITSUI SUMITOMO INSURANCE CO LTD2026.02.26	ACQUISITION	145,491	$10,423,848.19
MITSUI SUMITOMO INSURANCE CO LTD2026.02.26	ACQUISITION	7,509	$541,504.03
MITSUI SUMITOMO INSURANCE CO LTD2026.02.25	ACQUISITION	154,512	$11,030,874.35
MITSUI SUMITOMO INSURANCE CO LTD2026.02.25	ACQUISITION	14,356	$1,030,335.86
MITSUI SUMITOMO INSURANCE CO LTD2026.02.24	ACQUISITION	103,192	$7,277,430.05
MITSUI SUMITOMO INSURANCE CO LTD2026.02.24	ACQUISITION	61,594	$4,390,642.06
MITSUI SUMITOMO INSURANCE CO LTD2026.02.23	ACQUISITION	203,590	$14,473,844.23
MITSUI SUMITOMO INSURANCE CO LTD2026.02.23	ACQUISITION	16,410	$1,178,305.28
MITSUI SUMITOMO INSURANCE CO LTD2026.02.20	ACQUISITION	160,582	$11,369,944.28
MITSUI SUMITOMO INSURANCE CO LTD2026.02.19	ACQUISITION	300,986	$21,227,729.92
MITSUI SUMITOMO INSURANCE CO LTD2026.02.19	ACQUISITION	44,014	$3,146,785.33
MITSUI SUMITOMO INSURANCE CO LTD2026.02.18	ACQUISITION	239,750	$16,922,729.78
MITSUI SUMITOMO INSURANCE CO LTD2026.02.18	ACQUISITION	45,250	$3,210,908.32
MITSUI SUMITOMO INSURANCE CO LTD2026.02.17	ACQUISITION	281,386	$20,032,854.19
MITSUI SUMITOMO INSURANCE CO LTD2026.02.13	ACQUISITION	15,406	$1,074,335.87

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Automated_Queries :: Frequently Asked Questions

>Who is currently buying WRB stock?

Based on the latest SEC Form 4 filings, MITSUI SUMITOMO INSURANCE CO LTD (Officer/Other) has been actively acquiring shares. The total recent insider buying volume stands at $705.46M.

>Are WRB insiders selling their shares?

No significant open-market selling activity has been detected in the most recent batch of filings for WRB.

>What is the overall insider sentiment for WRB?

The short-term structural capital flow indicates a BULLISH sentiment, with a net flow of $705.46M generated by 4 active C-Suite entities.

SECTOR_PEERS :: Financials

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