Who has been buying Toyo Seikan Group Holdings, Ltd. stock?

12 distinct investors have filed 13 disclosed large-shareholding filings in Toyo Seikan Group Holdings, Ltd. (5901), most recently on 2026-04-07. 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 Toyo Seikan Group Holdings, Ltd. have?

Toyo Seikan Group Holdings, Ltd. has 13 buy-side and 16 sell-side disclosures on record, covering ¥61.8B ($398.8M) in total reported value, spanning 2021-04-05 to 2026-04-07.

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.

Toyo Seikan Group Holdings, Ltd. 5901

Company

東洋製罐グループホールディングス株式会社Toyo Seikan Group Holdings, Ltd.

Investors

Buys

Total Value

¥61.8B ($398.8M)

Avg Return

+91.15%

Last Filing

2026-04-07

Toyo Seikan Group Holdings, Ltd. (5901) has 13 disclosed large-shareholding filings and 16 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥61.8B ($398.8M) in reported transaction value. The earliest filing StockDrifts holds for Toyo Seikan Group Holdings, Ltd. is dated 2021-04-05; the most recent is 2026-04-07. Across these filings the average return since disclosure is +91.15%, 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
2026-04-07	SELL	unknown	株式会社三井住友銀行	other	3.3M	¥3,458	-31.2%	¥3.4B ($21.9M)
2026-04-07	SELL	unknown	三井住友DSアセットマネジメント株式会社	passive	2.4M	¥3,458	-31.2%	¥3.5B ($22.9M)
2025-10-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	4.2M	¥3,450	+31.5%	¥14.6B ($93.9M)
2025-10-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	3.5M	¥3,450	+31.5%	¥11.9B ($77.1M)
2025-07-07	SELL	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	8.5M	¥2,901	-56.4%	¥379M ($2.4M)
2025-03-21	BUY	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	8.7M	¥2,547.5	+78.1%	¥22.0B ($142.2M)
2024-06-03	BUY	unknown	学校法人東洋食品工業短期大学 TOYO COLLEGE OF FOOD TECHNOLOGY	other	16.8M	¥2,602.5	-	¥9.4B ($60.5M)
2024-06-03	BUY	Market Buy	学校法人東洋食品工業短期大学 TOYO COLLEGE OF FOOD TECHNOLOGY	other	16.8M	¥2,602.5	+74.3%	¥9.4B ($60.5M)
2024-05-21	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	3.4M	¥2,507	-80.9%	¥2.9B ($18.8M)
2024-05-21	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.1M	¥2,507	-80.9%	¥1.9B ($12.5M)
2024-05-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.8M	¥2,507	-80.9%	¥132M ($853K)
2024-05-02	SELL	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	8.6M	¥2,411	-88.1%	¥4.9B ($31.5M)
2023-04-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.9M	¥1,870	+142.6%	¥5.5B ($35.5M)
2023-04-20	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	4.7M	¥1,870	+142.6%	¥8.9B ($57.2M)
2023-04-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.0M	¥1,870	+142.6%	¥3.7B ($23.6M)
2022-03-18	BUY	Market Buy	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	12.3M	¥1,427	+217.9%	¥3.0B ($19.4M)
2021-10-20	BUY	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	10.2M	¥1,345	+237.3%	¥13.7B ($88.4M)
2021-10-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	589.6K	¥1,312	-	¥774M ($5.0M)
2021-10-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.9M	¥1,312	-	-
2021-10-06	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	4.4M	¥1,312	-245.7%	¥266M ($1.7M)
2021-10-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.8M	¥1,312	-245.7%	¥6.8B ($44.0M)
2021-10-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.2M	¥1,312	+245.7%	¥3.8B ($24.2M)
2021-10-06	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥1,312	-	-
2021-10-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	5.0M	¥1,312	+245.7%	¥6.4B ($41.3M)
2021-09-22	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.9M	¥1,344	-237.5%	¥1.7B ($10.9M)
2021-09-22	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	4.6M	¥1,344	-237.5%	¥300M ($1.9M)
2021-09-22	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	7.0M	¥1,344	-237.5%	¥109M ($704K)
2021-09-03	SELL	unknown	ネスナ・エルエルピー(Nesna LLP) Nesna LLP	unknown	0	¥1,574	-188.2%	¥16.1B ($103.8M)
2021-06-21	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.2M	¥1,512	-	-
2021-06-21	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	4.8M	¥1,512	+200.0%	¥1.4B ($9.3M)
2021-06-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	7.1M	¥1,512	-200.0%	¥245M ($1.6M)
2021-05-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	897	¥1,325	-	-
2021-05-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	359.0K	¥1,325	-242.3%	¥4.7B ($30.0M)
2021-05-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	15.6M	¥1,325	+242.3%	¥5.1B ($33.1M)
2021-04-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.9M	¥1,105.178	-	¥4.3B ($27.6M)
2021-04-05	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	11.7M	¥1,105.178	-310.4%	¥3.4B ($22.1M)
2021-04-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-3.3K	¥1,105.178	+206.1%	-

Frequently asked questions

Who has been buying Toyo Seikan Group Holdings, Ltd. stock?: 12 distinct investors have filed 13 disclosed large-shareholding filings in Toyo Seikan Group Holdings, Ltd. (5901), most recently on 2026-04-07. 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 Toyo Seikan Group Holdings, Ltd. have?: Toyo Seikan Group Holdings, Ltd. has 13 buy-side and 16 sell-side disclosures on record, covering ¥61.8B ($398.8M) in total reported value, spanning 2021-04-05 to 2026-04-07.
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.