Who has been buying HIRAYAMA HOLDINGS Co.,Ltd. stock?

5 distinct investors have filed 3 disclosed large-shareholding filings in HIRAYAMA HOLDINGS Co.,Ltd. (7781), most recently on 2026-03-13. 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 HIRAYAMA HOLDINGS Co.,Ltd. have?

HIRAYAMA HOLDINGS Co.,Ltd. has 3 buy-side and 21 sell-side disclosures on record, covering ¥1.9B ($12.2M) in total reported value, spanning 2022-04-07 to 2026-03-13.

Where does StockDrifts get HIRAYAMA HOLDINGS 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.

HIRAYAMA HOLDINGS Co.,Ltd. 7781

Company

株式会社平山ホールディングスHIRAYAMA HOLDINGS Co.,Ltd.

Investors

Buys

Total Value

¥1.9B ($12.2M)

Avg Return

+68.10%

Last Filing

2026-03-13

HIRAYAMA HOLDINGS Co.,Ltd. (7781) has 3 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.9B ($12.2M) in reported transaction value. The earliest filing StockDrifts holds for HIRAYAMA HOLDINGS Co.,Ltd. is dated 2022-04-07; the most recent is 2026-03-13. 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 +68.10%, 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
2026-03-13	SELL	unknown	株式会社SUNBASE	activist	1.5M	¥1,544	+6.1%	¥2.2B ($14.0M)
2026-03-13	SELL	unknown	合同会社スリーアローズ	activist	754.0K	¥1,544	+6.1%	¥1.1B ($7.1M)
2026-03-13	SELL	unknown	平山善一	strategic	909.0K	¥1,544	+6.1%	¥1.3B ($8.5M)
2024-09-24	BUY	unknown	株式会社SUNBASE SUNBASE Co., Ltd.	activist	1.5M	¥994	+45.9%	¥1.5B ($9.6M)
2024-09-24	SELL	unknown	合同会社スリーアローズ Three Arrows LLC	activist	754.0K	¥994	-45.9%	¥1.5B ($9.6M)
2024-09-24	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	909.0K	¥994	-45.9%	¥2M ($10K)
2024-09-13	SELL	Market Buy	合同会社スリーアローズ Three Arrows LLC	activist	2.3M	¥984	-47.4%	¥105M ($679K)
2024-09-13	BUY	Market Buy	平山善一 Yoshikazu Hirayama	strategic	909.0K	¥984	+47.4%	¥24M ($154K)
2022-12-22	BUY	unknown	合同会社スリーアローズ Three Arrows LLC	activist	2.3M	¥687	+111.1%	¥378M ($2.4M)
2022-12-22	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	844.4K	¥687	-111.1%	¥378M ($2.4M)
2022-12-13	SELL	unknown	合同会社スリーアローズ Three Arrows LLC	activist	1.7M	¥694	-108.9%	¥33M ($215K)
2022-12-13	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	1.4M	¥694	-108.9%	¥27M ($177K)
2022-05-25	SELL	unknown	平山惠一 Keiichi Hirayama	strategic	452.8K	¥667.5	-117.2%	¥6M ($36K)
2022-05-17	SELL	unknown	株式会社スリーアローズ Three Arrows Co., Ltd.	activist	852.0K	¥643	-125.5%	¥17M ($109K)
2022-05-17	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	697.2K	¥643	-125.5%	¥242K ($2K)
2022-04-07	SELL	unknown	株式会社スリーアローズ Three Arrows Co., Ltd.	activist	852.0K	¥681.5	-112.8%	¥10M ($67K)
2022-04-07	SELL	unknown	株式会社スリーアローズ Three Arrows Co., Ltd.	activist	852.0K	¥681.5	-112.8%	¥15M ($99K)
2022-04-07	SELL	unknown	株式会社スリーアローズ Three Arrows Co., Ltd.	activist	852.0K	¥681.5	-112.8%	¥10M ($67K)
2022-04-07	SELL	unknown	株式会社スリーアローズ Three Arrows Co., Ltd.	activist	852.0K	¥681.5	-112.8%	¥15M ($99K)
2022-04-07	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	697.2K	¥681.5	-112.8%	¥12M ($77K)
2022-04-07	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	697.2K	¥681.5	-112.8%	¥8M ($51K)
2022-04-07	SELL	unknown	ハクトコーポレーション株式会社 Hakuto Corporaiton Co., Ltd.	activist	255.6K	¥681.5	-112.8%	¥747K ($5K)
2022-04-07	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	697.2K	¥681.5	-112.8%	¥12M ($77K)
2022-04-07	SELL	unknown	平山善一 Yoshikazu Hirayama	strategic	697.2K	¥681.5	-112.8%	¥8M ($51K)

Frequently asked questions

Who has been buying HIRAYAMA HOLDINGS Co.,Ltd. stock?: 5 distinct investors have filed 3 disclosed large-shareholding filings in HIRAYAMA HOLDINGS Co.,Ltd. (7781), most recently on 2026-03-13. 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 HIRAYAMA HOLDINGS Co.,Ltd. have?: HIRAYAMA HOLDINGS Co.,Ltd. has 3 buy-side and 21 sell-side disclosures on record, covering ¥1.9B ($12.2M) in total reported value, spanning 2022-04-07 to 2026-03-13.
Where does StockDrifts get HIRAYAMA HOLDINGS 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 HIRAYAMA HOLDINGS Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.