Who has been buying JAMCO Corporation stock?

7 distinct investors have filed 9 disclosed large-shareholding filings in JAMCO Corporation (7408), most recently on 2025-05-28. 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 JAMCO Corporation have?

JAMCO Corporation has 9 buy-side and 2 sell-side disclosures on record, covering ¥83.6B ($539.7M) in total reported value, spanning 2025-01-17 to 2025-05-28.

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.

JAMCO Corporation 7408

Company

株式会社ジャムコJAMCO Corporation

Investors

Buys

Total Value

¥83.6B ($539.7M)

Avg Return

+0.06%

Last Filing

2025-05-28

JAMCO Corporation (7408) has 9 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥83.6B ($539.7M) in reported transaction value. The earliest filing StockDrifts holds for JAMCO Corporation is dated 2025-01-17; the most recent is 2025-05-28. Across these filings the average return since disclosure is +0.06%, 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
2025-05-28	BUY	Market Buy	伊藤忠商事株式会社 ITOCHU Corporation	strategic	16.7M	¥1,792	+0.1%	¥13.8B ($89.1M)
2025-05-22	BUY	acquisition	昭和飛行機工業株式会社 Showa Aircraft Industry Co., Ltd.	other	2.0M	¥1,790	+0.2%	-
2025-05-22	BUY	acquisition	株式会社BCJ-92 BCJ-92 Co., Ltd.	activist	12.1M	¥1,790	+0.2%	¥21.7B ($139.7M)
2025-05-22	BUY	Market Buy	ANAホールディングス株式会社 ANA HOLDINGS INC.	other	17.5M	¥1,790	+0.2%	¥21.7B ($139.8M)
2025-05-09	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	304.7K	¥1,797	+0.2%	¥116M ($747K)
2025-05-09	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	613.6K	¥1,797	+0.2%	¥714M ($4.6M)
2025-05-09	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	264.0K	¥1,797	-0.2%	¥43.9B ($283.4M)
2025-02-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	19.3K	¥1,795	-0.1%	¥35M ($223K)
2025-02-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.0M	¥1,795	-0.1%	¥1.8B ($11.7M)
2025-02-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	367.5K	¥1,795	-0.1%	¥660M ($4.3M)
2025-01-21	BUY	Market Buy	伊藤忠商事株式会社 ITOCHU Corporation	strategic	9.0M	¥1,792	+0.1%	¥101M ($652K)
2025-01-20	BUY	unknown	昭和飛行機工業株式会社 Showa Aircraft Industry Co., Ltd.	other	2.0M	¥1,791	-	-
2025-01-17	BUY	unknown	ANAホールディングス株式会社 ANA HOLDINGS INC.	other	5.4M	¥1,791	-	-

Frequently asked questions

Who has been buying JAMCO Corporation stock?: 7 distinct investors have filed 9 disclosed large-shareholding filings in JAMCO Corporation (7408), most recently on 2025-05-28. 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 JAMCO Corporation have?: JAMCO Corporation has 9 buy-side and 2 sell-side disclosures on record, covering ¥83.6B ($539.7M) in total reported value, spanning 2025-01-17 to 2025-05-28.
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.