Who has been buying Mitsui Matsushima Holdings Co., Ltd. stock?

27 distinct investors have filed 109 disclosed large-shareholding filings in Mitsui Matsushima Holdings Co., Ltd. (1518), most recently on 2025-11-17. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Mitsui Matsushima Holdings Co., Ltd. have?

Mitsui Matsushima Holdings Co., Ltd. has 109 buy-side and 55 sell-side disclosures on record, covering ¥8.1B ($52.2M) in total reported value, spanning 2021-04-06 to 2025-11-17.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Mitsui Matsushima Holdings Co., Ltd. 1518

Company

三井松島ホールディングス株式会社Mitsui Matsushima Holdings Co., Ltd.

Investors

Buys

109

Total Value

¥8.1B ($52.2M)

Avg Return

+126.48%

Last Filing

2025-11-17

Mitsui Matsushima Holdings Co., Ltd. (1518) has 109 disclosed large-shareholding filings and 55 disclosed disposals on record, filed by 27 distinct investors. Together those filings cover ¥8.1B ($52.2M) in reported transaction value. The earliest filing StockDrifts holds for Mitsui Matsushima Holdings Co., Ltd. is dated 2021-04-06; the most recent is 2025-11-17. Across these filings the average return since disclosure is +126.48%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-06-12	SELL	unknown	株式会社シティインデックスファースト	unknown	0	¥1,487	-54.7%	¥2.6B ($16.8M)
2026-06-12	BUY	Market Buy	株式会社エスグラントコーポレーション	activist	3.2M	¥1,487	+54.7%	¥3.8B ($24.8M)
2026-06-12	SELL	unknown	野村絢	activist	1.7M	¥1,487	-54.7%	¥962M ($6.2M)
2026-06-12	SELL	unknown	株式会社フォルティス	activist	3.6M	¥1,487	-54.7%	¥544M ($3.5M)
2026-06-12	BUY	unknown	株式会社レノ	activist	648.6K	¥1,487	-	¥964M ($6.2M)
2025-11-17	SELL	Market Buy	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.6M	¥1,299	-77.1%	¥1.2B ($7.7M)
2025-11-17	SELL	Market Buy	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	259.7K	¥1,299	-77.1%	¥255M ($1.6M)
2025-11-17	SELL	Market Buy	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	163.3K	¥1,299	-77.1%	¥272M ($1.8M)
2025-09-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	223	¥1,296	+77.5%	¥3M ($22K)
2025-09-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	76.1K	¥1,296	-77.5%	¥196M ($1.3M)
2025-09-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	474.2K	¥1,296	+77.5%	¥47M ($306K)
2025-08-18	SELL	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	unknown	0	¥1,270	-81.1%	¥1.3B ($8.2M)
2025-08-18	SELL	unknown	野村絢 Aya Nomura (Murakami family)	activist	466.5K	¥1,270	-81.1%	¥23M ($150K)
2025-08-18	SELL	unknown	株式会社フォルティス Fortis Co., Ltd.	activist	784.6K	¥1,270	-81.1%	¥345M ($2.2M)
2025-08-18	SELL	unknown	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	unknown	0	¥1,270	-81.1%	¥1.5B ($9.5M)
2025-08-18	SELL	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	129.0K	¥1,270	-81.1%	¥1.1B ($7.1M)
2025-08-18	BUY	unknown	株式会社シティインデックスファースト City Index First Co., Ltd.	activist	350.6K	¥1,270	+81.1%	¥76M ($492K)
2025-07-24	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	485.1K	¥1,160	-	-
2025-07-24	BUY	Market Buy	株式会社フォルティス Fortis Co., Ltd.	activist	1.1M	¥1,160	-	-
2025-07-24	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	1.2M	¥1,160	-	-
2025-07-24	BUY	Market Buy	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	996.5K	¥1,160	-	-
2025-07-24	BUY	Market Buy	株式会社シティインデックスファースト City Index First Co., Ltd.	activist	289.7K	¥1,160	+98.3%	¥124M ($802K)
2025-07-24	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.0M	¥1,160	-	-
2025-07-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	226.7K	¥1,088	+111.4%	¥92M ($596K)
2025-07-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	437.6K	¥1,088	-111.4%	¥7M ($46K)
2025-07-22	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-2.1K	¥1,088	-27.0%	¥176M ($1.1M)
2025-07-04	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	158.8K	¥1,052	+118.6%	¥40M ($257K)
2025-07-04	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	142.5K	¥1,052	+118.6%	¥67M ($434K)
2025-07-04	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	443.9K	¥1,052	-118.6%	¥21M ($133K)
2025-07-03	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.0M	¥1,018	-	-
2025-07-03	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	485.1K	¥1,018	-	-
2025-07-03	BUY	Market Buy	株式会社フォルティス Fortis Co., Ltd.	activist	1.1M	¥1,018	-	-
2025-07-03	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	1.2M	¥1,018	-	-
2025-07-03	BUY	Market Buy	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	996.5K	¥1,018	-	-
2025-07-03	BUY	Market Buy	株式会社シティインデックスファースト City Index First Co., Ltd.	activist	183.0K	¥1,018	-	¥186M ($1.2M)
2025-06-25	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	1.0M	¥983	+134.0%	¥40M ($257K)
2025-06-25	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	485.1K	¥983	-	-
2025-06-25	BUY	Market Buy	株式会社フォルティス Fortis Co., Ltd.	activist	1.1M	¥983	-	-
2025-06-25	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	1.2M	¥983	-	-
2025-06-25	BUY	Market Buy	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	996.5K	¥983	-	-
2025-03-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	121.3K	¥836	+175.1%	¥101M ($654K)
2025-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	79.0K	¥836	+175.1%	¥66M ($426K)
2025-03-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	464.1K	¥836	+175.1%	¥388M ($2.5M)
2025-01-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	122.2K	¥926	-148.4%	¥23M ($148K)
2025-01-20	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	964.5K	¥926	+148.4%	¥139M ($898K)
2025-01-20	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	485.1K	¥926	-	-
2025-01-20	BUY	Market Buy	株式会社フォルティス Fortis Co., Ltd.	activist	1.1M	¥926	-	-
2025-01-20	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	1.2M	¥926	-	-
2025-01-20	BUY	Market Buy	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	996.5K	¥926	-	-
2025-01-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	32.8K	¥926	-148.4%	¥145M ($937K)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Mitsui Matsushima Holdings Co., Ltd. stock?: 27 distinct investors have filed 109 disclosed large-shareholding filings in Mitsui Matsushima Holdings Co., Ltd. (1518), most recently on 2025-11-17. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Mitsui Matsushima Holdings Co., Ltd. have?: Mitsui Matsushima Holdings Co., Ltd. has 109 buy-side and 55 sell-side disclosures on record, covering ¥8.1B ($52.2M) in total reported value, spanning 2021-04-06 to 2025-11-17.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.