Who has been buying Acmos Inc. stock?

4 distinct investors have filed 7 disclosed large-shareholding filings in Acmos Inc. (6888), most recently on 2025-09-29. 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 Acmos Inc. have?

Acmos Inc. has 7 buy-side and 2 sell-side disclosures on record, covering ¥604M ($3.9M) in total reported value, spanning 2022-11-17 to 2025-09-29.

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.

Acmos Inc. 6888

Company

アクモス株式会社Acmos Inc.

Investors

Buys

Total Value

¥604M ($3.9M)

Avg Return

+19.78%

Last Filing

2025-09-29

Acmos Inc. (6888) has 7 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥604M ($3.9M) in reported transaction value. The earliest filing StockDrifts holds for Acmos Inc. is dated 2022-11-17; the most recent is 2025-09-29. Across these filings the average return since disclosure is +19.78%, 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
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	741.3K	¥559	-	-
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	200.2K	¥559	-	-
2025-05-09	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	741.3K	¥563	-	-
2025-05-09	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	200.2K	¥563	-11.4%	¥61M ($393K)
2025-03-27	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	741.3K	¥541	-7.8%	¥6M ($36K)
2025-03-27	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	92.4K	¥541	-	¥50M ($323K)
2025-02-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	731.3K	¥496	+0.6%	¥53M ($343K)
2024-08-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	624.4K	¥431	+15.8%	¥48M ($307K)
2024-07-17	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	513.9K	¥567	-12.0%	¥291M ($1.9M)
2022-11-17	BUY	unknown	コンセーユ・ティ・アイ株式会社 Conseil T.I. INC.	strategic	2.5M	¥385	+29.6%	¥242M ($1.6M)
2022-11-17	BUY	Market Buy	コンセーユ・ティ・アイ株式会社 Conseil T.I. INC.	strategic	2.5M	¥385	+29.6%	¥242M ($1.6M)
2022-11-17	SELL	Market Buy	飯島秀幸 Hideyuki Iijima	strategic	314.4K	¥385	-29.6%	¥274M ($1.8M)
2022-11-17	SELL	unknown	飯島秀幸 Hideyuki Iijima	strategic	314.4K	¥385	-29.6%	¥274M ($1.8M)

Frequently asked questions

Who has been buying Acmos Inc. stock?: 4 distinct investors have filed 7 disclosed large-shareholding filings in Acmos Inc. (6888), most recently on 2025-09-29. 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 Acmos Inc. have?: Acmos Inc. has 7 buy-side and 2 sell-side disclosures on record, covering ¥604M ($3.9M) in total reported value, spanning 2022-11-17 to 2025-09-29.
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.