Who has been buying Eidai Co.,Ltd. stock?

2 distinct investors have filed 3 disclosed large-shareholding filings in Eidai Co.,Ltd. (7822), most recently on 2026-01-16. 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 Eidai Co.,Ltd. have?

Eidai Co.,Ltd. has 3 buy-side and 1 sell-side disclosures on record, covering ¥117M ($753K) in total reported value, spanning 2022-07-05 to 2026-01-16.

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.

Eidai Co.,Ltd. 7822

Company

永大産業株式会社Eidai Co.,Ltd.

Investors

Buys

Total Value

¥117M ($753K)

Avg Return

-3.24%

Last Filing

2026-01-16

Eidai Co.,Ltd. (7822) has 3 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥117M ($753K) in reported transaction value. The earliest filing StockDrifts holds for Eidai Co.,Ltd. is dated 2022-07-05; the most recent is 2026-01-16. Across these filings the average return since disclosure is -3.24%, 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
2026-01-16	BUY	unknown	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	4.1M	¥247	-	¥117M ($753K)
2026-01-16	BUY	Market Buy	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	4.1M	¥247	+4.5%	¥117M ($753K)
2023-10-27	BUY	unknown	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	3.6M	¥217	-	¥106M ($681K)
2023-10-27	BUY	Market Buy	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	3.6M	¥217	+18.9%	¥106M ($681K)
2022-07-05	BUY	unknown	永大産業取引先持株会理事長工藤恭輔 Kyosuke Kudo	unknown	0	¥263	-	¥892M ($5.8M)
2022-07-05	BUY	unknown	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	3.2M	¥263	-1.9%	¥832M ($5.4M)
2022-07-05	BUY	unknown	永大産業取引先持株会理事長足立年彦 Toshihiko Adachi	strategic	3.2M	¥263	-	¥832M ($5.4M)
2022-07-05	SELL	unknown	永大産業取引先持株会理事長工藤恭輔 Kyosuke Kudo	strategic	0	¥263	+1.9%	¥892M ($5.8M)

Frequently asked questions

Who has been buying Eidai Co.,Ltd. stock?: 2 distinct investors have filed 3 disclosed large-shareholding filings in Eidai Co.,Ltd. (7822), most recently on 2026-01-16. 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 Eidai Co.,Ltd. have?: Eidai Co.,Ltd. has 3 buy-side and 1 sell-side disclosures on record, covering ¥117M ($753K) in total reported value, spanning 2022-07-05 to 2026-01-16.
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.