Who has been buying AIMECHATEC, Ltd. stock?

13 distinct investors have filed 54 disclosed large-shareholding filings in AIMECHATEC, Ltd. (6227), most recently on 2026-03-23. 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 AIMECHATEC, Ltd. have?

AIMECHATEC, Ltd. has 54 buy-side and 28 sell-side disclosures on record, covering ¥19.2B ($123.9M) in total reported value, spanning 2021-08-06 to 2026-03-23.

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.

AIMECHATEC, Ltd. 6227

Company

AIメカテック株式会社AIMECHATEC, Ltd.

Investors

Buys

Total Value

¥19.2B ($123.9M)

Avg Return

+621.72%

Last Filing

2026-03-23

AIMECHATEC, Ltd. (6227) has 54 disclosed large-shareholding filings and 28 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥19.2B ($123.9M) in reported transaction value. The earliest filing StockDrifts holds for AIMECHATEC, Ltd. is dated 2021-08-06; the most recent is 2026-03-23. Across these filings the average return since disclosure is +621.72%, 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
2026-09-25	SELL	Market Buy	アローストリート・キャピタル・リミテッド・パートナーシップ(Arrowstreet Capital, Limited Partnership) Arrowstreet Capital, Limited Partnership	passive	950.8K	¥6,170	+0.0%	¥1.3B ($8.1M)
2026-09-07	SELL	Market Buy	アローストリート・キャピタル・リミテッド・パートナーシップ(Arrowstreet Capital, Limited Partnership) Arrowstreet Capital, Limited Partnership	passive	1.2M	¥6,590	+6.4%	¥2.2B ($13.9M)
2026-03-23	BUY	Market Buy	アローストリート・キャピタル・リミテッド・パートナーシップ(Arrowstreet Capital, Limited Partnership) Arrowstreet Capital, Limited Partnership	passive	493.6K	¥6,133.333	+0.6%	¥3.0B ($19.5M)
2026-02-02	BUY	Market Buy	片山晃 AKIRA KATAYAMA	passive	410.6K	¥2,776.67	+122.2%	¥1.1B ($7.4M)
2026-01-08	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	311.8K	¥2,016.67	-205.9%	¥193M ($1.2M)
2025-12-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	407.0K	¥1,538.33	+301.1%	¥101M ($655K)
2025-12-05	SELL	Market Buy	SMBC日興証券株式会社	other	500	¥1,538.33	-301.1%	¥19M ($125K)
2025-10-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	13.3K	¥1,665	+270.6%	¥22M ($143K)
2025-10-22	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	341.3K	¥1,665	+270.6%	¥568M ($3.7M)
2025-02-21	BUY	unknown	株式会社オプトラン OPTORUN CO.,LTD.	strategic	1.1M	¥1,218.33	+406.4%	¥1.3B ($8.7M)
2025-02-20	SELL	unknown	JUKI株式会社 JUKI CORPORATION	strategic	0	¥1,258.33	-390.3%	¥1.5B ($10.0M)
2024-10-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	30.4K	¥942	-	¥2.8B ($18.1M)
2024-10-04	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	252.7K	¥942	-	¥235M ($1.5M)
2024-09-05	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	313.6K	¥614.33	-	¥190M ($1.2M)
2024-09-05	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	500	¥614.33	-	¥38M ($246K)
2024-08-22	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	86.9K	¥685	-	¥7M ($44K)
2024-08-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	204.3K	¥685	-	¥136M ($878K)
2024-08-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	300	¥691.33	-	¥207K ($1K)
2024-08-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	418.8K	¥691.33	-	¥290M ($1.9M)
2024-08-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	100	¥608.33	-	¥4M ($27K)
2024-08-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	270.7K	¥608.33	-	¥163M ($1.1M)
2024-07-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	6.6K	¥805.67	-	¥25M ($161K)
2024-07-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	323.3K	¥805.67	-	¥257M ($1.7M)
2024-06-21	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	76.9K	¥824.67	-	¥7M ($43K)
2024-06-21	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	338.7K	¥824.67	-	¥272M ($1.8M)
2024-06-19	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	37.4K	¥835.33	-	¥6M ($40K)
2024-06-19	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	399.2K	¥835.33	-	¥329M ($2.1M)
2024-06-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	30.1K	¥917	-	¥32M ($207K)
2024-06-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	499.6K	¥917	-	¥453M ($2.9M)
2024-06-04	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	479.1K	¥924.33	-	¥51M ($326K)
2024-06-04	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	84.6K	¥924.33	-	¥18M ($119K)
2024-05-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	63.1K	¥918	-	¥16M ($106K)
2024-05-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	527.0K	¥918	-	¥81M ($522K)
2024-05-15	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	105.1K	¥1,153.33	-435.0%	¥78M ($503K)
2024-05-15	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	534.4K	¥1,153.33	+435.0%	¥16M ($102K)
2024-04-19	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	173.1K	¥1,046.67	-489.5%	¥83M ($534K)
2024-04-19	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	521.1K	¥1,046.67	+489.5%	¥17M ($112K)
2024-04-18	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	76.8K	¥1,133.33	+444.4%	¥65M ($420K)
2024-04-18	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	414.7K	¥1,133.33	+444.4%	¥465M ($3.0M)
2024-04-16	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	254.5K	¥1,103.33	-459.2%	¥80M ($513K)
2024-04-16	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	503.7K	¥1,103.33	+459.2%	¥31M ($198K)
2024-04-09	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	329.4K	¥1,150	-436.5%	¥78M ($501K)
2024-04-09	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	475.1K	¥1,150	+436.5%	¥28M ($177K)
2024-04-05	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	19.2K	¥1,171.67	-426.6%	¥439M ($2.8M)
2024-04-05	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	492.5K	¥1,171.67	+426.6%	¥94M ($604K)
2024-04-04	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	400.2K	¥1,205	-412.0%	¥84M ($543K)
2024-04-04	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	450.1K	¥1,205	+412.0%	¥34M ($221K)
2024-03-28	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	419.4K	¥1,331.67	-	-
2024-03-28	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	474.4K	¥1,331.67	-363.3%	¥82M ($531K)
2024-03-26	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	419.4K	¥1,338.33	+361.0%	¥39M ($254K)

Showing the 50 most recent of 88 filings.

Frequently asked questions

Who has been buying AIMECHATEC, Ltd. stock?: 13 distinct investors have filed 54 disclosed large-shareholding filings in AIMECHATEC, Ltd. (6227), most recently on 2026-03-23. 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 AIMECHATEC, Ltd. have?: AIMECHATEC, Ltd. has 54 buy-side and 28 sell-side disclosures on record, covering ¥19.2B ($123.9M) in total reported value, spanning 2021-08-06 to 2026-03-23.
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.