MITSUI SUMITOMO INSURANCE CO LTD

Ten-percent owner · WRB

As of 2026-09-16, MITSUI SUMITOMO INSURANCE CO LTD has 94 Form 4 transactions on record across 1 company — 94 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct $4.1B
Indirect $0

WRB

direct

58,780,450 sh

$4.1B

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

WRB · 94 trades

Filing ledger

Date	Company	Action	Shares @ price	Value	Ownership Δ	Owned after	Filing
2026-03-03	WRB	Purchase	73,185 @ $72.52	$5.3M	+0.1% of holding	58,780,450	Form 4
2026-03-03	WRB	Purchase	38,991 @ $71.60	$2.8M	+0.1% of holding	58,707,265	Form 4
2026-03-02	WRB	Purchase	100,897 @ $73.20	$7.4M	+0.2% of holding	58,668,274	Form 4
2026-03-02	WRB	Purchase	45,103 @ $72.29	$3.3M	+0.1% of holding	58,567,377	Form 4
2026-02-27	WRB	Purchase	147,000 @ $71.63	$10.5M	+0.3% of holding	58,522,274	Form 4
2026-02-26	WRB	Purchase	145,491 @ $71.65	$10.4M	+0.2% of holding	58,367,765	Form 4
2026-02-26	WRB	Purchase	7,509 @ $72.11	$542K	+0.0% of holding	58,375,274	Form 4
2026-02-25	WRB	Purchase	154,512 @ $71.39	$11.0M	+0.3% of holding	58,207,918	Form 4
2026-02-25	WRB	Purchase	14,356 @ $71.77	$1.0M	+0.0% of holding	58,222,274	Form 4
2026-02-24	WRB	Purchase	103,192 @ $70.52	$7.3M	+0.2% of holding	57,991,812	Form 4
2026-02-24	WRB	Purchase	61,594 @ $71.28	$4.4M	+0.1% of holding	58,053,406	Form 4
2026-02-23	WRB	Purchase	203,590 @ $71.09	$14.5M	+0.4% of holding	57,872,210	Form 4
2026-02-23	WRB	Purchase	16,410 @ $71.80	$1.2M	+0.0% of holding	57,888,620	Form 4
2026-02-20	WRB	Purchase	160,582 @ $70.80	$11.4M	+0.3% of holding	57,668,620	Form 4
2026-02-19	WRB	Purchase	300,986 @ $70.53	$21.2M	+0.5% of holding	57,464,024	Form 4
2026-02-19	WRB	Purchase	44,014 @ $71.50	$3.1M	+0.1% of holding	57,508,038	Form 4
2026-02-18	WRB	Purchase	239,750 @ $70.58	$16.9M	+0.4% of holding	57,117,788	Form 4
2026-02-18	WRB	Purchase	45,250 @ $70.96	$3.2M	+0.1% of holding	57,163,038	Form 4
2026-02-17	WRB	Purchase	281,386 @ $71.19	$20.0M	+0.5% of holding	56,878,038	Form 4
2026-02-13	WRB	Purchase	15,406 @ $69.73	$1.1M	+0.0% of holding	56,592,058	Form 4
2026-02-13	WRB	Purchase	4,314 @ $70.30	$303K	+0.0% of holding	56,596,372	Form 4
2026-02-13	WRB	Purchase	280 @ $71.18	$20K	+0.0% of holding	56,596,652	Form 4
2026-02-12	WRB	Purchase	17,599 @ $71.88	$1.3M	+0.0% of holding	56,574,251	Form 4
2026-02-12	WRB	Purchase	2,401 @ $72.76	$175K	+0.0% of holding	56,576,652	Form 4
2026-02-11	WRB	Purchase	11,163 @ $71.45	$798K	+0.0% of holding	56,556,652	Form 4
2026-02-11	WRB	Purchase	9,289 @ $69.59	$646K	+0.0% of holding	56,541,911	Form 4
2026-02-11	WRB	Purchase	3,578 @ $70.50	$252K	+0.0% of holding	56,545,489	Form 4
2026-02-10	WRB	Purchase	21,884 @ $69.09	$1.5M	+0.0% of holding	56,520,540	Form 4
2026-02-10	WRB	Purchase	12,082 @ $69.92	$845K	+0.0% of holding	56,532,622	Form 4
2026-02-09	WRB	Purchase	35,952 @ $69.27	$2.5M	+0.1% of holding	56,494,608	Form 4
2026-02-09	WRB	Purchase	4,048 @ $70.32	$285K	+0.0% of holding	56,498,656	Form 4
2026-02-06	WRB	Purchase	15,694 @ $70.46	$1.1M	+0.0% of holding	56,454,350	Form 4
2026-02-06	WRB	Purchase	4,306 @ $71.39	$307K	+0.0% of holding	56,458,656	Form 4
2026-02-05	WRB	Purchase	13,472 @ $71.25	$960K	+0.0% of holding	56,438,656	Form 4
2026-02-05	WRB	Purchase	6,528 @ $70.79	$462K	+0.0% of holding	56,425,184	Form 4
2026-02-04	WRB	Purchase	22,415 @ $70.25	$1.6M	+0.0% of holding	56,418,656	Form 4
2026-02-04	WRB	Purchase	2,585 @ $69.77	$180K	+0.0% of holding	56,396,241	Form 4
2026-02-03	WRB	Purchase	31,653 @ $68.87	$2.2M	+0.1% of holding	56,393,656	Form 4
2026-02-03	WRB	Purchase	8,347 @ $67.75	$565K	+0.0% of holding	56,362,003	Form 4
2026-02-02	WRB	Purchase	237,062 @ $67.71	$16.1M	+0.4% of holding	56,340,497	Form 4
2026-02-02	WRB	Purchase	13,159 @ $68.42	$900K	+0.0% of holding	56,353,656	Form 4
2026-01-30	WRB	Purchase	195,000 @ $68.36	$13.3M	+0.3% of holding	56,103,435	Form 4
2026-01-29	WRB	Purchase	262,282 @ $68.08	$17.9M	+0.5% of holding	55,880,717	Form 4
2026-01-29	WRB	Purchase	27,718 @ $68.56	$1.9M	+0.0% of holding	55,908,435	Form 4
2026-01-28	WRB	Purchase	280,354 @ $67.58	$18.9M	+0.5% of holding	55,589,858	Form 4
2026-01-28	WRB	Purchase	28,577 @ $67.89	$1.9M	+0.1% of holding	55,618,435	Form 4
2026-01-27	WRB	Purchase	325,960 @ $67.40	$22.0M	+0.6% of holding	55,298,251	Form 4
2026-01-27	WRB	Purchase	11,987 @ $66.87	$802K	+0.0% of holding	54,972,291	Form 4
2026-01-27	WRB	Purchase	8,582 @ $68.56	$588K	+0.0% of holding	55,306,833	Form 4
2026-01-27	WRB	Purchase	2,671 @ $69.04	$184K	+0.0% of holding	55,309,504	Form 4
2026-01-27	WRB	Purchase	800 @ $65.86	$53K	+0.0% of holding	54,960,304	Form 4
2026-01-26	WRB	Purchase	293,611 @ $66.86	$19.6M	+0.5% of holding	54,883,115	Form 4
2026-01-26	WRB	Purchase	76,389 @ $67.88	$5.2M	+0.1% of holding	54,959,504	Form 4
2026-01-23	WRB	Purchase	201,081 @ $66.77	$13.4M	+0.4% of holding	54,422,585	Form 4
2026-01-23	WRB	Purchase	166,919 @ $67.18	$11.2M	+0.3% of holding	54,589,504	Form 4
2026-01-22	WRB	Purchase	330,000 @ $67.45	$22.3M	+0.6% of holding	54,221,504	Form 4
2026-01-21	WRB	Purchase	260,998 @ $67.60	$17.6M	+0.5% of holding	53,891,504	Form 4
2026-01-21	WRB	Purchase	59,002 @ $66.95	$4.0M	+0.1% of holding	53,630,506	Form 4
2026-01-20	WRB	Purchase	265,006 @ $67.75	$18.0M	+0.5% of holding	53,526,510	Form 4
2026-01-20	WRB	Purchase	44,994 @ $68.08	$3.1M	+0.1% of holding	53,571,504	Form 4
2026-01-16	WRB	Purchase	241,309 @ $68.03	$16.4M	+0.5% of holding	53,202,813	Form 4
2026-01-16	WRB	Purchase	58,691 @ $68.79	$4.0M	+0.1% of holding	53,261,504	Form 4
2026-01-15	WRB	Purchase	166,907 @ $68.67	$11.5M	+0.3% of holding	52,893,411	Form 4
2026-01-15	WRB	Purchase	68,093 @ $69.45	$4.7M	+0.1% of holding	52,961,504	Form 4
2026-01-14	WRB	Purchase	208,272 @ $69.23	$14.4M	+0.4% of holding	52,726,504	Form 4
2026-01-14	WRB	Purchase	21,728 @ $68.80	$1.5M	+0.0% of holding	52,518,232	Form 4
2026-01-13	WRB	Purchase	206,499 @ $68.15	$14.1M	+0.4% of holding	52,496,504	Form 4
2026-01-13	WRB	Purchase	118,501 @ $67.82	$8.0M	+0.2% of holding	52,290,005	Form 4
2026-01-12	WRB	Purchase	256,041 @ $68.73	$17.6M	+0.5% of holding	52,171,504	Form 4
2026-01-09	WRB	Purchase	161,176 @ $68.48	$11.0M	+0.3% of holding	51,801,639	Form 4
2026-01-09	WRB	Purchase	105,674 @ $69.56	$7.4M	+0.2% of holding	51,907,313	Form 4
2026-01-09	WRB	Purchase	8,150 @ $70.12	$571K	+0.0% of holding	51,915,463	Form 4
2026-01-08	WRB	Purchase	151,511 @ $70.32	$10.7M	+0.3% of holding	51,640,463	Form 4
2026-01-08	WRB	Purchase	39,302 @ $69.69	$2.7M	+0.1% of holding	51,488,952	Form 4
2026-01-08	WRB	Purchase	4,187 @ $68.79	$288K	+0.0% of holding	51,449,650	Form 4
2026-01-07	WRB	Purchase	254,622 @ $68.47	$17.4M	+0.5% of holding	51,435,085	Form 4
2026-01-07	WRB	Purchase	10,378 @ $69.20	$718K	+0.0% of holding	51,445,463	Form 4
2026-01-06	WRB	Purchase	122,931 @ $69.93	$8.6M	+0.2% of holding	51,088,106	Form 4
2026-01-06	WRB	Purchase	92,357 @ $70.21	$6.5M	+0.2% of holding	51,180,463	Form 4
2026-01-05	WRB	Purchase	153,686 @ $70.78	$10.9M	+0.3% of holding	50,965,175	Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.