Who has been buying ASTMAX Co., Ltd. stock?

8 distinct investors have filed 4 disclosed large-shareholding filings in ASTMAX Co., Ltd. (7162), most recently on 2026-05-01. 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 ASTMAX Co., Ltd. have?

ASTMAX Co., Ltd. has 4 buy-side and 5 sell-side disclosures on record, covering ¥387M ($2.5M) in total reported value, spanning 2021-09-02 to 2026-05-01.

Where does StockDrifts get ASTMAX Co., Ltd. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

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.

ASTMAX Co., Ltd. 7162

Company

アストマックス株式会社ASTMAX Co., Ltd.

Investors

Buys

Total Value

¥387M ($2.5M)

Avg Return

-8.80%

Last Filing

2026-05-01

ASTMAX Co., Ltd. (7162) has 4 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥387M ($2.5M) in reported transaction value. The earliest filing StockDrifts holds for ASTMAX Co., Ltd. is dated 2021-09-02; the most recent is 2026-05-01. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is -8.80%, 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
2026-07-03	BUY	Market Buy	山本真紀	passive	301.2K	¥264	-7.6%	¥80M ($513K)
2026-07-03	BUY	Market Buy	山本純也	passive	393.0K	¥264	-7.6%	¥104M ($669K)
2026-07-03	BUY	Market Buy	有限会社啓尚企画	passive	1.2M	¥264	-7.6%	¥309M ($2.0M)
2026-05-01	BUY	Market Buy	山本真紀	activist	301.2K	¥298	+7.7%	¥90M ($579K)
2026-05-01	BUY	Market Buy	山本純也	activist	393.0K	¥298	+7.7%	¥117M ($756K)
2026-05-01	SELL	Market Buy	有限会社啓尚企画	activist	1.2M	¥298	-7.7%	¥14M ($89K)
2026-05-01	BUY	Market Buy	山本真紀	activist	301.2K	¥298	+7.7%	¥90M ($579K)
2026-05-01	BUY	Market Buy	山本純也	activist	393.0K	¥298	+7.7%	¥117M ($756K)
2026-05-01	SELL	Market Buy	有限会社啓尚企画	activist	1.2M	¥298	-7.7%	¥14M ($89K)
2025-06-18	BUY	Market Buy	ヒューリックプロパティソリューション株式会社 Hulic Property Solution Co., Ltd.	strategic	2.4M	¥255	-9.4%	¥179M ($1.2M)
2025-06-18	SELL	unknown	株式会社大和証券グループ本社 Daiwa Securities Group Inc.	unknown	0	¥255	+9.4%	¥424M ($2.7M)
2025-05-30	BUY	private	ヒューリックプロパティソリューション株式会社 Hulic Property Solution Co., Ltd.	strategic	1.7M	¥227	+1.8%	¥377M ($2.4M)
2025-05-30	BUY	unknown	株式会社大和証券グループ本社 Daiwa Securities Group Inc.	other	1.7M	¥227	+1.8%	¥377M ($2.4M)
2024-02-07	BUY	unknown	株式会社大和証券グループ本社 Daiwa Securities Group Inc.	other	1.7M	¥238	-2.9%	¥146M ($940K)
2024-02-07	SELL	unknown	株式会社大和証券グループ本社 Daiwa Securities Group Inc.	other	1.7M	¥238	+2.9%	¥146M ($940K)
2022-08-01	BUY	Market Buy	牛嶋英揚 Hideaki Ushijima	activist	665.6K	¥294	-21.4%	¥196M ($1.3M)
2021-09-02	SELL	negotiated	マネックスグループ株式会社 Monex Group, Inc.	strategic	433.0K	¥246	+6.1%	¥32M ($209K)
2021-09-02	BUY	negotiated	マネックス証券株式会社 Monex ,Inc.	other	144.6K	¥246	-6.1%	¥12M ($79K)

Frequently asked questions

Who has been buying ASTMAX Co., Ltd. stock?: 8 distinct investors have filed 4 disclosed large-shareholding filings in ASTMAX Co., Ltd. (7162), most recently on 2026-05-01. 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 ASTMAX Co., Ltd. have?: ASTMAX Co., Ltd. has 4 buy-side and 5 sell-side disclosures on record, covering ¥387M ($2.5M) in total reported value, spanning 2021-09-02 to 2026-05-01.
Where does StockDrifts get ASTMAX Co., Ltd. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
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.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for ASTMAX Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.