Who has been buying Hioki E.E. Corporation stock?

7 distinct investors have filed 7 disclosed large-shareholding filings in Hioki E.E. Corporation (6866), most recently on 2025-06-24. 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 Hioki E.E. Corporation have?

Hioki E.E. Corporation has 7 buy-side and 9 sell-side disclosures on record, covering ¥21.6B ($139.5M) in total reported value, spanning 2021-08-20 to 2025-06-24.

Where does StockDrifts get Hioki E.E. Corporation 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.

Hioki E.E. Corporation 6866

Company

日置電機株式会社Hioki E.E. Corporation

Investors

Buys

Total Value

¥21.6B ($139.5M)

Avg Return

+50.61%

Last Filing

2025-06-24

Hioki E.E. Corporation (6866) has 7 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥21.6B ($139.5M) in reported transaction value. The earliest filing StockDrifts holds for Hioki E.E. Corporation is dated 2021-08-20; the most recent is 2025-06-24. 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 +50.61%, 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
2025-06-24	SELL	unknown	日置勇二 Yuji Hioki	strategic	514.6K	¥5,630	-88.6%	¥1.7B ($10.9M)
2024-04-18	SELL	unknown	日置宣子 Nobuko Hioki	strategic	61.4K	¥6,430	-65.2%	¥117M ($756K)
2024-04-18	BUY	unknown	日置恒明 HIOKI TSUNEAKI	strategic	800.1K	¥6,430	+65.2%	¥5.1B ($33.2M)
2024-01-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	449.6K	¥6,350	+67.2%	¥2.8B ($18.2M)
2024-01-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	14.2K	¥6,350	-67.2%	¥27M ($172K)
2024-01-22	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	58.0K	¥6,350	-67.2%	¥53M ($345K)
2023-12-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	66.4K	¥6,290	-68.8%	¥53M ($341K)
2023-12-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	627.6K	¥6,290	+68.8%	¥3.9B ($25.2M)
2023-12-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	18.3K	¥6,290	+68.8%	¥62M ($398K)
2023-09-25	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	11.4K	¥7,290	-45.7%	¥20M ($132K)
2023-09-25	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	783.9K	¥7,290	+45.7%	¥5.6B ($36.4M)
2023-09-25	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	8.4K	¥7,290	+45.7%	¥6.0B ($38.9M)
2023-09-25	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	74.8K	¥7,290	-45.7%	¥123M ($792K)
2023-06-07	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	14.4K	¥9,040	-17.5%	¥13M ($82K)
2023-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	924.8K	¥9,040	+17.5%	¥8.3B ($53.3M)
2023-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	13.5K	¥9,040	+17.5%	¥122M ($787K)
2023-06-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	91.6K	¥9,040	-17.5%	¥634M ($4.1M)
2021-08-20	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	15.8K	¥7,560	+40.5%	¥119M ($771K)
2021-08-20	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥7,560	+40.5%	¥997M ($6.4M)
2021-08-20	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	14.7K	¥7,560	+40.5%	¥111M ($717K)
2021-08-20	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	161.2K	¥7,560	+40.5%	¥1.2B ($7.9M)

Frequently asked questions

Who has been buying Hioki E.E. Corporation stock?: 7 distinct investors have filed 7 disclosed large-shareholding filings in Hioki E.E. Corporation (6866), most recently on 2025-06-24. 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 Hioki E.E. Corporation have?: Hioki E.E. Corporation has 7 buy-side and 9 sell-side disclosures on record, covering ¥21.6B ($139.5M) in total reported value, spanning 2021-08-20 to 2025-06-24.
Where does StockDrifts get Hioki E.E. Corporation 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 Hioki E.E. Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.