Mitsui Sumitomo Insurance Co. Ltd

CIK: 0001142206

Transaction Breakdown

Open Market Buys (P)94 (100.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)0 (0.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

WRB

BERKLEY W R CORP

10% Owner

Discretionary Trading P&L

Holdings

Transaction History (94 total)

WRB
BERKLEY W R CORP
Mar 3, 2026
Purchase(P)
Direct
39K shares at avg. $71.60$2.8M
WRB
BERKLEY W R CORP
Mar 3, 2026
Purchase(P)
Direct
73.2K shares at avg. $72.52$5.3M
WRB
BERKLEY W R CORP
Mar 2, 2026
Purchase(P)
Direct
100.9K shares at avg. $73.20$7.4M
WRB
BERKLEY W R CORP
Mar 2, 2026
Purchase(P)
Direct
45.1K shares at avg. $72.29$3.3M
WRB
BERKLEY W R CORP
Feb 27, 2026
Purchase(P)
Direct
147K shares at avg. $71.63$10.5M
WRB
BERKLEY W R CORP
Feb 26, 2026
Purchase(P)
Direct
7.5K shares at avg. $72.11$542K
WRB
BERKLEY W R CORP
Feb 26, 2026
Purchase(P)
Direct
145.5K shares at avg. $71.65$10.4M
WRB
BERKLEY W R CORP
Feb 25, 2026
Purchase(P)
Direct
14.4K shares at avg. $71.77$1.0M
WRB
BERKLEY W R CORP
Feb 25, 2026
Purchase(P)
Direct
154.5K shares at avg. $71.39$11.0M
WRB
BERKLEY W R CORP
Feb 24, 2026
Purchase(P)
Direct
61.6K shares at avg. $71.28$4.4M
WRB
BERKLEY W R CORP
Feb 24, 2026
Purchase(P)
Direct
103.2K shares at avg. $70.52$7.3M
WRB
BERKLEY W R CORP
Feb 23, 2026
Purchase(P)
Direct
16.4K shares at avg. $71.80$1.2M
WRB
BERKLEY W R CORP
Feb 23, 2026
Purchase(P)
Direct
203.6K shares at avg. $71.09$14.5M
WRB
BERKLEY W R CORP
Feb 20, 2026
Purchase(P)
Direct
160.6K shares at avg. $70.80$11.4M
WRB
BERKLEY W R CORP
Feb 19, 2026
Purchase(P)
Direct
44K shares at avg. $71.50$3.1M
WRB
BERKLEY W R CORP
Feb 19, 2026
Purchase(P)
Direct
301K shares at avg. $70.53$21.2M
WRB
BERKLEY W R CORP
Feb 18, 2026
Purchase(P)
Direct
239.8K shares at avg. $70.58$16.9M
WRB
BERKLEY W R CORP
Feb 18, 2026
Purchase(P)
Direct
45.3K shares at avg. $70.96$3.2M
WRB
BERKLEY W R CORP
Feb 17, 2026
Purchase(P)
Direct
281.4K shares at avg. $71.19$20.0M
WRB
BERKLEY W R CORP
Feb 13, 2026
Purchase(P)
Direct
280 shares at avg. $71.18$20K
WRB
BERKLEY W R CORP
Feb 13, 2026
Purchase(P)
Direct
15.4K shares at avg. $69.73$1.1M
WRB
BERKLEY W R CORP
Feb 13, 2026
Purchase(P)
Direct
4.3K shares at avg. $70.30$303K
WRB
BERKLEY W R CORP
Feb 12, 2026
Purchase(P)
Direct
2.4K shares at avg. $72.76$175K
WRB
BERKLEY W R CORP
Feb 12, 2026
Purchase(P)
Direct
17.6K shares at avg. $71.88$1.3M
WRB
BERKLEY W R CORP
Feb 11, 2026
Purchase(P)
Direct
9.3K shares at avg. $69.59$646K

		Type	Shares	Price		Ownership
Mar 3, 2026	WRB BERKLEY W R CORP	Purchase(P)	38,991	$71.60	$2,791,604	Direct
Mar 3, 2026	WRB BERKLEY W R CORP	Purchase(P)	73,185	$72.52	$5,307,654	Direct
Mar 2, 2026	WRB BERKLEY W R CORP	Purchase(P)	100,897	$73.20	$7,385,459	Direct
Mar 2, 2026	WRB BERKLEY W R CORP	Purchase(P)	45,103	$72.29	$3,260,288	Direct
Feb 27, 2026	WRB BERKLEY W R CORP	Purchase(P)	147,000	$71.63	$10,528,963	Direct
Feb 26, 2026	WRB BERKLEY W R CORP	Purchase(P)	7,509	$72.11	$541,504	Direct
Feb 26, 2026	WRB BERKLEY W R CORP	Purchase(P)	145,491	$71.65	$10,423,848	Direct
Feb 25, 2026	WRB BERKLEY W R CORP	Purchase(P)	14,356	$71.77	$1,030,336	Direct
Feb 25, 2026	WRB BERKLEY W R CORP	Purchase(P)	154,512	$71.39	$11,030,874	Direct
Feb 24, 2026	WRB BERKLEY W R CORP	Purchase(P)	61,594	$71.28	$4,390,642	Direct
Feb 24, 2026	WRB BERKLEY W R CORP	Purchase(P)	103,192	$70.52	$7,277,430	Direct
Feb 23, 2026	WRB BERKLEY W R CORP	Purchase(P)	16,410	$71.80	$1,178,305	Direct
Feb 23, 2026	WRB BERKLEY W R CORP	Purchase(P)	203,590	$71.09	$14,473,844	Direct
Feb 20, 2026	WRB BERKLEY W R CORP	Purchase(P)	160,582	$70.80	$11,369,944	Direct
Feb 19, 2026	WRB BERKLEY W R CORP	Purchase(P)	44,014	$71.50	$3,146,785	Direct
Feb 19, 2026	WRB BERKLEY W R CORP	Purchase(P)	300,986	$70.53	$21,227,730	Direct
Feb 18, 2026	WRB BERKLEY W R CORP	Purchase(P)	239,750	$70.58	$16,922,730	Direct
Feb 18, 2026	WRB BERKLEY W R CORP	Purchase(P)	45,250	$70.96	$3,210,908	Direct
Feb 17, 2026	WRB BERKLEY W R CORP	Purchase(P)	281,386	$71.19	$20,032,854	Direct
Feb 13, 2026	WRB BERKLEY W R CORP	Purchase(P)	280	$71.18	$19,932	Direct
Feb 13, 2026	WRB BERKLEY W R CORP	Purchase(P)	15,406	$69.73	$1,074,336	Direct
Feb 13, 2026	WRB BERKLEY W R CORP	Purchase(P)	4,314	$70.30	$303,264	Direct
Feb 12, 2026	WRB BERKLEY W R CORP	Purchase(P)	2,401	$72.76	$174,690	Direct
Feb 12, 2026	WRB BERKLEY W R CORP	Purchase(P)	17,599	$71.88	$1,265,030	Direct
Feb 11, 2026	WRB BERKLEY W R CORP	Purchase(P)	9,289	$69.59	$646,400	Direct

1-25 of 94 transactions

About MITSUI SUMITOMO INSURANCE CO LTD

MITSUI SUMITOMO INSURANCE CO LTD (SEC CIK 0001142206) files insider reports with the SEC as 10% Owner of BERKLEY W R CORP (WRB).

Signal8 holds 21 ownership filings by MITSUI SUMITOMO INSURANCE CO LTD (1 Form 3, 20 Form 4), filed between Dec 11, 2025 and Mar 3, 2026. Those filings report 94 transactions, from Dec 18, 2025 to Mar 3, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on MITSUI SUMITOMO INSURANCE CO LTD's filings is in TOKYO, M0.

Recent filings by MITSUI SUMITOMO INSURANCE CO LTD

Mar 3, 2026: Open-market purchases of WRB shares (2 lines, Form 4, code P).
Mar 2, 2026: Open-market purchases of WRB shares (2 lines, Form 4, code P).
Feb 27, 2026: Open-market purchase of WRB shares (Form 4, code P).
Feb 26, 2026: Open-market purchases of WRB shares (2 lines, Form 4, code P).
Feb 25, 2026: Open-market purchases of WRB shares (2 lines, Form 4, code P).

Other insiders filing for BERKLEY W R CORP (WRB)

Welt Philip S, EVP & Secretary
Baio Richard Mark, EVP & CFO
BERKLEY WILLIAM R JR, Chairman, President and CEO
SHIEL JAMES G, EVP - Investments
BERKLEY WILLIAM R, Executive Chairman
Ferre Maria Luisa, Director

How to read Form 4 transaction codes