Who has been buying Seibu Giken Co.,Ltd. stock?

3 distinct investors have filed 4 disclosed large-shareholding filings in Seibu Giken Co.,Ltd. (6223), most recently on 2024-12-05. 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 Seibu Giken Co.,Ltd. have?

Seibu Giken Co.,Ltd. has 4 buy-side and 3 sell-side disclosures on record, covering ¥20.4B ($131.3M) in total reported value, spanning 2023-10-11 to 2024-12-05.

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.

Seibu Giken Co.,Ltd. 6223

Company

株式会社西部技研Seibu Giken Co.,Ltd.

Investors

Buys

Total Value

¥20.4B ($131.3M)

Avg Return

-12.64%

Last Filing

2024-12-05

Seibu Giken Co.,Ltd. (6223) has 4 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥20.4B ($131.3M) in reported transaction value. The earliest filing StockDrifts holds for Seibu Giken Co.,Ltd. is dated 2023-10-11; the most recent is 2024-12-05. Across these filings the average return since disclosure is -12.64%, 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
2024-12-05	SELL	unknown	隈扶三郎 FUMIO KUMA	activist	374.7K	¥1,657	-17.7%	¥3.0B ($19.6M)
2024-12-05	BUY	unknown	株式会社グリーンフューチャー Green Future Co., Ltd.	activist	6.8M	¥1,657	+17.7%	¥3.0B ($19.6M)
2023-11-06	SELL	unknown	隈扶三郎 FUMIO KUMA	activist	2.2M	¥2,471	+21.1%	¥2.0B ($12.6M)
2023-11-06	SELL	unknown	隈扶三郎 FUMIO KUMA	activist	2.2M	¥2,471	+21.1%	¥2.0B ($12.6M)
2023-11-06	BUY	unknown	株式会社グリーンフューチャー Green Future Co., Ltd.	activist	5.0M	¥2,471	-	¥12.4B ($79.7M)
2023-11-06	BUY	unknown	株式会社グリーンフューチャー Green Future Co., Ltd.	activist	5.0M	¥2,471	-	¥12.4B ($79.7M)
2023-10-11	BUY	unknown	公益財団法人隈科学技術・文化振興会 Kuma Science Engineering and Culture Promotional Foundation	strategic	3.0M	¥2,886	-	¥8.7B ($55.9M)
2023-10-11	BUY	unknown	公益財団法人隈科学技術・文化振興会 Kuma Science Engineering and Culture Promotional Foundation	strategic	3.0M	¥2,886	-32.4%	¥8.7B ($55.9M)
2023-10-11	BUY	unknown	隈扶三郎 FUMIO KUMA	activist	3.0M	¥2,886	-32.4%	¥8.7B ($55.9M)
2023-10-11	BUY	unknown	株式会社グリーンフューチャー Green Future Co., Ltd.	activist	5.0M	¥2,886	-32.4%	¥14.4B ($93.1M)

Frequently asked questions

Who has been buying Seibu Giken Co.,Ltd. stock?: 3 distinct investors have filed 4 disclosed large-shareholding filings in Seibu Giken Co.,Ltd. (6223), most recently on 2024-12-05. 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 Seibu Giken Co.,Ltd. have?: Seibu Giken Co.,Ltd. has 4 buy-side and 3 sell-side disclosures on record, covering ¥20.4B ($131.3M) in total reported value, spanning 2023-10-11 to 2024-12-05.
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.