MITSUI SUMITOMO INSURANCE CO L… — Form 4 Insider Trades

Summary

Updated Jul 16, 2026

MITSUI SUMITOMO INSURANCE CO LTD is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $705.46M. Historical track record: 3/5 stars across 94 tracked purchases.

Profile

Sumitomo Mitsui Trust Group, Inc. , formerly Chuo Mitsui Trust Holdings, Inc., is a Japanese financial holding company headquartered in Chiyoda, Tokyo. It provides an assortment of financial products to retail and wholesale customers, with a focus on asset management, financial brokerage, and real estate services.

Role	Insider
Notability	60/100
Links	Wikipedia

Track Record

InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.

InsiderAlpha rating	★★★☆☆ (3/5)
Total purchases tracked	94
Purchases with forward-return data	94
30-day win rate	4149%
90-day win rate	213%
Avg 5-day return	-8.64%
Avg 30-day return	-95.05%
Avg 90-day return	-456.99%
Best 30-day return	+729.56%

Recent Transactions

Date	Ticker	Company	Code	Shares	Price	Value
2026-03-04	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	73.2K	$72.52	$5.31M
2026-03-04	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	39.0K	$71.60	$2.79M
2026-03-04	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	100.9K	$73.20	$7.39M
2026-03-04	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	45.1K	$72.29	$3.26M
2026-02-28	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	147.0K	$71.63	$10.53M
2026-02-28	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	7.5K	$72.11	$542K
2026-02-28	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	145.5K	$71.65	$10.42M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	14.4K	$71.77	$1.03M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	154.5K	$71.39	$11.03M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	61.6K	$71.28	$4.39M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	103.2K	$70.52	$7.28M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	16.4K	$71.80	$1.18M
2026-02-26	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	203.6K	$71.09	$14.47M
2026-02-21	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	160.6K	$70.80	$11.37M
2026-02-21	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	44.0K	$71.50	$3.15M
2026-02-21	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	301.0K	$70.53	$21.23M
2026-02-18	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	45.2K	$70.96	$3.21M
2026-02-18	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	239.8K	$70.58	$16.92M
2026-02-18	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	281.4K	$71.19	$20.03M
2026-02-14	WRB	BERKLEY W R CORP	P — Open-market purchase [10b5-1]	280	$71.18	$20K

Frequently Asked Questions

Who is MITSUI SUMITOMO INSURANCE CO LTD?

Has MITSUI SUMITOMO INSURANCE CO LTD been buying or selling stock?

Recorded transactions: 94 open-market purchases ($705.46M) and 0 open-market sales () across all tracked filings.

How accurate is MITSUI SUMITOMO INSURANCE CO LTD's historical track record?

Across 94 tracked purchases, MITSUI SUMITOMO INSURANCE CO LTD averaged -95.1% avg 30-day return with a 4149% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.

Where can I see all of MITSUI SUMITOMO INSURANCE CO LTD's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

MITSUI SUMITOMO INSURANCE CO LTD — SEC Form 4 Insider Trading Activity