Who has been buying Mimaki Engineering Co., Ltd. stock?

13 distinct investors have filed 19 disclosed large-shareholding filings in Mimaki Engineering Co., Ltd. (6638), most recently on 2026-04-06. 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 Mimaki Engineering Co., Ltd. have?

Mimaki Engineering Co., Ltd. has 19 buy-side and 14 sell-side disclosures on record, covering ¥8.0B ($51.5M) in total reported value, spanning 2021-05-19 to 2026-04-06.

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.

Mimaki Engineering Co., Ltd. 6638

Company

株式会社ミマキエンジニアリングMimaki Engineering Co., Ltd.

Investors

Buys

Total Value

¥8.0B ($51.5M)

Avg Return

+41.73%

Last Filing

2026-04-06

Mimaki Engineering Co., Ltd. (6638) has 19 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥8.0B ($51.5M) in reported transaction value. The earliest filing StockDrifts holds for Mimaki Engineering Co., Ltd. is dated 2021-05-19; the most recent is 2026-04-06. Across these filings the average return since disclosure is +41.73%, 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
2026-09-18	SELL	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	2.3M	¥2,092	+0.0%	¥764M ($4.9M)
2026-09-04	BUY	Market Buy	池田和明	activist	42.8K	¥1,900	+10.1%	¥24M ($157K)
2026-09-04	BUY	unknown	アデキパートナーズ株式会社	activist	833.2K	¥1,900	-	-
2026-09-04	BUY	unknown	株式会社池田ホールディングス	activist	4.5M	¥1,900	-	-
2026-09-04	BUY	Market Buy	池田和明	activist	55.8K	¥1,900	+10.1%	¥18M ($118K)
2026-09-04	BUY	unknown	アデキパートナーズ株式会社	activist	833.2K	¥1,900	-	-
2026-09-04	BUY	Market Buy	株式会社池田ホールディングス	activist	6.0M	¥1,900	+10.1%	¥1.8B ($11.9M)
2026-09-04	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,900	-	-
2026-09-04	SELL	unknown	小林美和	strategic	369.6K	¥1,900	-10.1%	¥323M ($2.1M)
2026-09-04	SELL	unknown	田中芳子	strategic	394.5K	¥1,900	-10.1%	¥950M ($6.1M)
2026-09-04	BUY	unknown	株式会社田中企画	strategic	2.8M	¥1,900	-	-
2026-07-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	2.7M	¥1,937	+8.0%	¥689M ($4.4M)
2026-06-30	BUY	unknown	株式会社田中企画	strategic	2.8M	¥1,785	-	-
2026-06-30	BUY	unknown	田中芳子	strategic	894.5K	¥1,785	-	-
2026-06-30	BUY	unknown	小林美和	strategic	539.6K	¥1,785	-	-
2026-06-30	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,785	-	-
2026-05-21	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	2.3M	¥1,804	+16.0%	¥439M ($2.8M)
2026-04-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	2.1M	¥1,598	+30.9%	¥512M ($3.3M)
2026-03-31	BUY	Market Buy	株式会社田中企画	strategic	2.8M	¥1,565	+33.7%	¥852M ($5.5M)
2026-03-31	BUY	Market Buy	田中芳子	strategic	894.5K	¥1,565	-	-
2026-03-31	SELL	Market Buy	田中雅幸	strategic	0	¥1,565	-33.7%	¥852M ($5.5M)
2026-03-31	BUY	Market Buy	小林美和	strategic	539.6K	¥1,565	-	-
2026-03-31	BUY	Market Buy	ミマキ電子部品株式会社	strategic	65.0K	¥1,565	-	-
2026-03-10	BUY	unknown	株式会社田中企画	strategic	2.2M	¥1,743	-	-
2026-03-10	SELL	unknown	田中規幸(相続人代表田中雅幸)	strategic	22.3K	¥1,743	-20.0%	¥1.7B ($11.2M)
2026-03-10	BUY	unknown	田中芳子	strategic	894.5K	¥1,743	+20.0%	¥257M ($1.7M)
2026-03-10	BUY	unknown	田中雅幸	strategic	521.1K	¥1,743	+20.0%	¥469M ($3.0M)
2026-03-10	BUY	unknown	小林美和	strategic	539.6K	¥1,743	+20.0%	¥497M ($3.2M)
2026-03-10	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,743	-	-
2026-03-10	BUY	unknown	株式会社田中企画	strategic	2.2M	¥1,743	-	-
2026-03-10	SELL	unknown	田中規幸(相続人代表田中雅幸)	strategic	0	¥1,743	-20.0%	¥1.8B ($11.5M)
2026-03-10	BUY	unknown	田中芳子	strategic	894.5K	¥1,743	+20.0%	¥257M ($1.7M)
2026-03-10	BUY	unknown	田中雅幸	strategic	543.4K	¥1,743	+20.0%	¥508M ($3.3M)
2026-03-10	BUY	unknown	小林美和	strategic	539.6K	¥1,743	+20.0%	¥497M ($3.2M)
2026-03-10	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,743	-	-
2026-01-29	BUY	unknown	株式会社田中企画	strategic	2.2M	¥1,732	-	-
2026-01-29	BUY	unknown	田中芳子	strategic	747.6K	¥1,732	+20.8%	¥877M ($5.7M)
2026-01-29	BUY	unknown	田中雅幸	strategic	253.8K	¥1,732	-	¥440M ($2.8M)
2026-01-29	BUY	unknown	小林美和	strategic	253.8K	¥1,732	-	¥440M ($2.8M)
2026-01-29	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,732	-	-
2026-01-29	BUY	unknown	株式会社田中企画	strategic	2.2M	¥1,732	-	-
2026-01-29	SELL	unknown	田中規幸(相続人代表田中雅幸)	strategic	1.0M	¥1,732	-20.8%	¥1.8B ($11.3M)
2026-01-29	BUY	unknown	田中芳子	strategic	747.6K	¥1,732	+20.8%	¥877M ($5.7M)
2026-01-29	BUY	unknown	田中雅幸	strategic	253.8K	¥1,732	-	¥440M ($2.8M)
2026-01-29	BUY	unknown	小林美和	strategic	253.8K	¥1,732	-	¥440M ($2.8M)
2026-01-29	BUY	unknown	ミマキ電子部品株式会社	strategic	65.0K	¥1,732	-	-
2026-01-29	SELL	unknown	田中規幸(相続人代表田中雅幸)	strategic	1.0M	¥1,732	-20.8%	¥1.8B ($11.3M)
2026-01-06	BUY	unknown	田中規幸(相続人代表田中雅幸)	activist	2.0M	¥1,681	-	-
2026-01-06	BUY	unknown	株式会社田中企画	activist	2.2M	¥1,681	-	-
2026-01-06	BUY	unknown	田中芳子	activist	240.0K	¥1,681	-	-

Showing the 50 most recent of 107 filings.

Frequently asked questions

Who has been buying Mimaki Engineering Co., Ltd. stock?: 13 distinct investors have filed 19 disclosed large-shareholding filings in Mimaki Engineering Co., Ltd. (6638), most recently on 2026-04-06. 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 Mimaki Engineering Co., Ltd. have?: Mimaki Engineering Co., Ltd. has 19 buy-side and 14 sell-side disclosures on record, covering ¥8.0B ($51.5M) in total reported value, spanning 2021-05-19 to 2026-04-06.
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.