Who has been buying JMC Corporation stock?

3 distinct investors have filed 2 disclosed large-shareholding filings in JMC Corporation (5704), most recently on 2026-02-24. 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 JMC Corporation have?

JMC Corporation has 2 buy-side and 11 sell-side disclosures on record, covering ¥500M ($3.2M) in total reported value, spanning 2021-12-06 to 2026-02-24.

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.

JMC Corporation 5704

Company

株式会社JMCJMC Corporation

Investors

Buys

Total Value

¥500M ($3.2M)

Avg Return

-3.67%

Last Filing

2026-02-24

JMC Corporation (5704) has 2 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥500M ($3.2M) in reported transaction value. The earliest filing StockDrifts holds for JMC Corporation is dated 2021-12-06; the most recent is 2026-02-24. Across these filings the average return since disclosure is -3.67%, 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
2026-02-24	BUY	Market Buy	渡邊大知	activist	1.3M	¥409	-5.4%	¥2M ($12K)
2026-02-24	BUY	Market Buy	渡邊商事株式会社	activist	251.0K	¥409	-5.4%	¥27M ($176K)
2024-04-26	SELL	unknown	渡邊大知 Daichi Watanabe	activist	1.3M	¥764	+49.4%	¥46M ($298K)
2024-04-26	SELL	unknown	渡邊商事株式会社 Watanabe Shoji Co., Ltd.	activist	184.0K	¥764	+49.4%	¥3M ($17K)
2024-02-26	SELL	unknown	鈴木浩之 Hiroyuki Suzuki	activist	401.2K	¥856	+54.8%	¥68M ($441K)
2024-02-15	SELL	unknown	鈴木浩之 Hiroyuki Suzuki	activist	481.2K	¥994	+61.1%	¥32M ($208K)
2023-11-24	SELL	unknown	渡邊大知 Daichi Watanabe	activist	1.3M	¥1,285	+69.9%	¥112M ($720K)
2023-11-24	SELL	unknown	渡邊商事株式会社 Watanabe Shoji Co., Ltd.	activist	184.0K	¥1,285	+69.9%	¥706K ($5K)
2023-11-10	SELL	unknown	渡邊大知 Daichi Watanabe	activist	1.4M	¥1,092	+64.6%	¥8M ($54K)
2023-11-10	SELL	unknown	渡邊商事株式会社 Watanabe Shoji Co., Ltd.	activist	184.0K	¥1,092	+64.6%	¥7M ($46K)
2023-02-22	SELL	unknown	鈴木浩之 Hiroyuki Suzuki	activist	498.2K	¥699	+44.6%	¥12M ($79K)
2023-02-22	BUY	unknown	鈴木浩之 Hiroyuki Suzuki	activist	498.2K	¥699	-	¥12M ($79K)
2022-12-09	BUY	unknown	鈴木浩之 Hiroyuki Suzuki	activist	515.2K	¥781	-	-
2021-12-06	SELL	unknown	渡邊商事株式会社 Watanabe Shoji Co., Ltd.	activist	184.0K	¥528	+26.7%	¥1M ($9K)
2021-12-06	SELL	unknown	渡邊大知 Daichi Watanabe	activist	1.4M	¥528	+26.7%	¥7M ($47K)

Frequently asked questions

Who has been buying JMC Corporation stock?: 3 distinct investors have filed 2 disclosed large-shareholding filings in JMC Corporation (5704), most recently on 2026-02-24. 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 JMC Corporation have?: JMC Corporation has 2 buy-side and 11 sell-side disclosures on record, covering ¥500M ($3.2M) in total reported value, spanning 2021-12-06 to 2026-02-24.
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.