MITSUI SUMITOMO INSURANCE CO LTD Insider Trades (WRB)

Spot the Money

MITSUI SUMITOMO INSURANCE CO LTD

Insider at BERKLEY W R CORP

Company: BERKLEY W R CORP
Ticker: WRB
First filing on record: December 22, 2025
Latest trade on record: March 3, 2026
SEC filings: EDGAR ↗

MITSUI SUMITOMO INSURANCE CO LTD, Insider at BERKLEY W R CORP, has disclosed 94 transactions in WRB since December 22, 2025: 94 purchases (94 open-market buys) and 0 sales, worth about $705.5M at the reported prices. The latest was filed March 3, 2026, 0 days after the trade; 3 filings were late against the 2-business-day Form 4 deadline.

Last updated March 3, 2026 · Source: SEC EDGAR Form 4 filings

Transactions

94

Open-market buys

94

Sales

0

Avg. disclosure lag

1.0d

Trading in charts

Trade timeline

When does this person trade, how big, and in which direction? Every trade in the last 12 months.

Bought (above the line)Sold (below the line)

In the last 12 months MITSUI SUMITOMO INSURANCE CO LTD made 94 purchases worth $705M and no sales. Dot size is the dollar amount.

Portfolio mix

Which stocks does this person trade most? Tile size is dollars traded, all time on record.

MITSUI SUMITOMO INSURANCE CO LTD has traded 1 stock on record; the largest by dollars is WRB.

Reporting lag

Does this person report on time? One bar per filing against the Form 4 deadline.

On timeLate

1 of 20 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).

What kind of transactions

Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.

Rows by Form 4 transaction code
Code	Meaning	Rows	Shares	Value
P	Open-market purchase	94	10,178,862	$705.5M

Rows by year of the trade
Year	Rows	Bought	Sold
2026	83	83 · $570.2M	0
2025	11	11 · $135.3M	0

Transactions

Download WRB trades (CSV)126 rows · 45 KB · every filer in this ticker, this insider included · all downloads

Security	Side	Trade date	Disclosed	Lag	Shares	Price	Value	Flags	Source
WRB	Buy P	March 3, 2026	March 3, 2026	0d	73,185	$73	$5.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	March 3, 2026	March 3, 2026	0d	38,991	$72	$2.8M	10b5-1 plan	Form 4 ↗
WRB	Buy P	March 2, 2026	March 3, 2026	1d	100,897	$73	$7.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	March 2, 2026	March 3, 2026	1d	45,103	$72	$3.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 27, 2026	February 27, 2026	0d	147,000	$72	$10.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 26, 2026	February 27, 2026	1d	7,509	$72	$542K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 26, 2026	February 27, 2026	1d	145,491	$72	$10.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 25, 2026	February 25, 2026	0d	14,356	$72	$1.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 25, 2026	February 25, 2026	0d	154,512	$71	$11.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 24, 2026	February 25, 2026	1d	61,594	$71	$4.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 24, 2026	February 25, 2026	1d	103,192	$71	$7.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 23, 2026	February 25, 2026	2d	16,410	$72	$1.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 23, 2026	February 25, 2026	2d	203,590	$71	$14.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 20, 2026	February 20, 2026	0d	160,582	$71	$11.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 19, 2026	February 20, 2026	1d	44,014	$71	$3.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 19, 2026	February 20, 2026	1d	300,986	$71	$21.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 18, 2026	February 18, 2026	0d	45,250	$71	$3.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 18, 2026	February 18, 2026	0d	239,750	$71	$16.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 17, 2026	February 18, 2026	1d	281,386	$71	$20.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 13, 2026	February 13, 2026	0d	280	$71	$20K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 13, 2026	February 13, 2026	0d	4,314	$70	$303K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 13, 2026	February 13, 2026	0d	15,406	$70	$1.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 12, 2026	February 13, 2026	1d	2,401	$73	$175K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 12, 2026	February 13, 2026	1d	17,599	$72	$1.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 11, 2026	February 11, 2026	0d	11,163	$71	$798K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 11, 2026	February 11, 2026	0d	3,578	$71	$252K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 11, 2026	February 11, 2026	0d	9,289	$70	$646K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 10, 2026	February 11, 2026	1d	12,082	$70	$845K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 10, 2026	February 11, 2026	1d	21,884	$69	$1.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 9, 2026	February 11, 2026	2d	4,048	$70	$285K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 9, 2026	February 11, 2026	2d	35,952	$69	$2.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 6, 2026	February 6, 2026	0d	4,306	$71	$307K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 6, 2026	February 6, 2026	0d	15,694	$70	$1.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 5, 2026	February 6, 2026	1d	13,472	$71	$960K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 5, 2026	February 6, 2026	1d	6,528	$71	$462K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 4, 2026	February 4, 2026	0d	22,415	$70	$1.6M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 4, 2026	February 4, 2026	0d	2,585	$70	$180K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 3, 2026	February 4, 2026	1d	31,653	$69	$2.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 3, 2026	February 4, 2026	1d	8,347	$68	$565K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 2, 2026	February 4, 2026	2d	13,159	$68	$900K	10b5-1 plan	Form 4 ↗
WRB	Buy P	February 2, 2026	February 4, 2026	2d	237,062	$68	$16.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 30, 2026	January 30, 2026	0d	195,000	$68	$13.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 29, 2026	January 30, 2026	1d	27,718	$69	$1.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 29, 2026	January 30, 2026	1d	262,282	$68	$17.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 28, 2026	January 28, 2026	0d	28,577	$68	$1.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 28, 2026	January 28, 2026	0d	280,354	$68	$18.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 27, 2026	January 28, 2026	1d	2,671	$69	$184K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 27, 2026	January 28, 2026	1d	8,582	$69	$588K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 27, 2026	January 28, 2026	1d	325,960	$67	$22.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 27, 2026	January 28, 2026	1d	11,987	$67	$802K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 27, 2026	January 28, 2026	1d	800	$66	$53K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 26, 2026	January 28, 2026	2d	76,389	$68	$5.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 26, 2026	January 28, 2026	2d	293,611	$67	$19.6M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 23, 2026	January 23, 2026	0d	166,919	$67	$11.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 23, 2026	January 23, 2026	0d	201,081	$67	$13.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 22, 2026	January 23, 2026	1d	330,000	$67	$22.3M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 21, 2026	January 21, 2026	0d	260,998	$68	$17.6M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 21, 2026	January 21, 2026	0d	59,002	$67	$4.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 20, 2026	January 21, 2026	1d	44,994	$68	$3.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 20, 2026	January 21, 2026	1d	265,006	$68	$18.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 16, 2026	January 16, 2026	0d	58,691	$69	$4.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 16, 2026	January 16, 2026	0d	241,309	$68	$16.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 15, 2026	January 16, 2026	1d	68,093	$69	$4.7M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 15, 2026	January 16, 2026	1d	166,907	$69	$11.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 14, 2026	January 14, 2026	0d	208,272	$69	$14.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 14, 2026	January 14, 2026	0d	21,728	$69	$1.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 13, 2026	January 14, 2026	1d	206,499	$68	$14.1M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 13, 2026	January 14, 2026	1d	118,501	$68	$8.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 12, 2026	January 14, 2026	2d	256,041	$69	$17.6M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 9, 2026	January 9, 2026	0d	8,150	$70	$571K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 9, 2026	January 9, 2026	0d	105,674	$70	$7.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 9, 2026	January 9, 2026	0d	161,176	$68	$11.0M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 8, 2026	January 9, 2026	1d	151,511	$70	$10.7M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 8, 2026	January 9, 2026	1d	39,302	$70	$2.7M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 8, 2026	January 9, 2026	1d	4,187	$69	$288K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 7, 2026	January 7, 2026	0d	10,378	$69	$718K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 7, 2026	January 7, 2026	0d	254,622	$68	$17.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 6, 2026	January 7, 2026	1d	92,357	$70	$6.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 6, 2026	January 7, 2026	1d	122,931	$70	$8.6M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 5, 2026	January 7, 2026	2d	153,686	$71	$10.9M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 5, 2026	January 7, 2026	2d	35,894	$70	$2.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 5, 2026	January 7, 2026	2d	11,350	$69	$785K	10b5-1 plan	Form 4 ↗
WRB	Buy P	January 2, 2026	January 2, 2026	0d	237,734	$69	$16.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 31, 2025	January 2, 2026	2d	230,000	$70	$16.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 30, 2025	January 2, 2026	3d	205,000	$71	$14.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 29, 2025	December 29, 2025	0d	205,000	$71	$14.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 26, 2025	December 29, 2025	3d	220,000	$71	$15.5M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 24, 2025	December 29, 2025	5d	220,000	$71	$15.5M	late 10b5-1 plan	Form 4 ↗
WRB	Buy P	December 23, 2025	December 29, 2025	6d	2,027	$71	$144K	late 10b5-1 plan	Form 4 ↗
WRB	Buy P	December 23, 2025	December 29, 2025	6d	232,546	$70	$16.4M	late 10b5-1 plan	Form 4 ↗
WRB	Buy P	December 22, 2025	December 22, 2025	0d	162,060	$70	$11.4M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 22, 2025	December 22, 2025	0d	39,940	$70	$2.8M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 19, 2025	December 22, 2025	3d	204,000	$70	$14.2M	10b5-1 plan	Form 4 ↗
WRB	Buy P	December 18, 2025	December 22, 2025	4d	204,350	$69	$14.2M	10b5-1 plan	Form 4 ↗

Filings

Filed	Form	Accession	Rows	Status	Source
March 3, 2026	Form 4	0001193125-26-089411	4	published	EDGAR ↗
February 27, 2026	Form 4	0001193125-26-083630	3	published	EDGAR ↗
February 25, 2026	Form 4	0001193125-26-072599	6	published	EDGAR ↗
February 20, 2026	Form 4	0001193125-26-061923	3	published	EDGAR ↗
February 18, 2026	Form 4	0001193125-26-057634	3	published	EDGAR ↗
February 13, 2026	Form 4	0001193125-26-052089	5	published	EDGAR ↗
February 11, 2026	Form 4	0001193125-26-047258	7	published	EDGAR ↗
February 6, 2026	Form 4	0001193125-26-041641	4	published	EDGAR ↗
February 4, 2026	Form 4	0001193125-26-038028	6	published	EDGAR ↗
January 30, 2026	Form 4	0001193125-26-032269	3	published	EDGAR ↗
January 28, 2026	Form 4	0001193125-26-027858	9	published	EDGAR ↗
January 23, 2026	Form 4	0001193125-26-021399	3	published	EDGAR ↗
January 21, 2026	Form 4	0001193125-26-018358	4	published	EDGAR ↗
January 16, 2026	Form 4	0001193125-26-015569	4	published	EDGAR ↗
January 14, 2026	Form 4	0001193125-26-013375	5	published	EDGAR ↗
January 9, 2026	Form 4	0001193125-26-009283	6	published	EDGAR ↗
January 7, 2026	Form 4	0001193125-26-006715	7	published	EDGAR ↗
January 2, 2026	Form 4	0001193125-26-001178	3	published	EDGAR ↗
December 29, 2025	Form 4	0001193125-25-335622	5	published	EDGAR ↗
December 22, 2025	Form 4	0001193125-25-329220	4	published	EDGAR ↗

Other insiders at BERKLEY W R CORP

BERKLEY WILLIAM R JR Chairman, President and CEO 3 rows
BLAYLOCK RONALD E Director 3 rows
SHIEL JAMES G EVP - Investments 3 rows
Baio Richard Mark EVP & CFO 2 rows
Welt Philip S EVP & Secretary 2 rows
Augostini Christopher L Director 1 row
BERKLEY WILLIAM R Executive Chairman 1 row
Farrell Mary C Director 1 row
Ferre Maria Luisa Director 1 row
Mattson Marie Angela Director 1 row

Everyone on file, with contracts and lobbying under the company's name: BERKLEY W R CORP.

Guides for this page

What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.

Sources and method

Official sources behind this page
Source	Filings	Rows	First filed	Newest filed	Read the originals
SEC EDGAR, Form 4	20	94	December 22, 2025	March 3, 2026	Form 4 list on EDGAR

Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.

Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.

Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.