Who has been buying ONEX Corporation stock?

8 distinct investors have filed 25 disclosed large-shareholding filings in ONEX Corporation (5987), most recently on 2025-06-09. 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 ONEX Corporation have?

ONEX Corporation has 25 buy-side and 18 sell-side disclosures on record, covering ¥3.0B ($19.1M) in total reported value, spanning 2021-07-07 to 2025-06-09.

Where does StockDrifts get ONEX 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.

ONEX Corporation 5987

Company

株式会社オーネックスONEX Corporation

Investors

Buys

Total Value

¥3.0B ($19.1M)

Avg Return

-3.59%

Last Filing

2025-06-09

ONEX Corporation (5987) has 25 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥3.0B ($19.1M) in reported transaction value. The earliest filing StockDrifts holds for ONEX Corporation is dated 2021-07-07; the most recent is 2025-06-09. 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 -3.59%, 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
2025-06-09	BUY	Market Buy	山川伯勇 Hakuyu Yamakawa	passive	126.2K	¥2,174	-17.3%	¥274M ($1.8M)
2025-06-09	BUY	Market Buy	山川雪英 Yukihide Yamakawa	unknown	12.5K	¥2,174	-17.3%	¥27M ($175K)
2025-05-21	SELL	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	51	¥2,210	+18.6%	¥26M ($170K)
2025-05-21	SELL	unknown	大屋翼 OYA TSUBASA	other	150.6K	¥2,210	+18.6%	¥30M ($196K)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	SELL	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	87.6K	¥2,261	+20.4%	¥41M ($264K)
2025-05-09	BUY	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	12.0K	¥2,261	-20.4%	¥75M ($484K)
2025-05-09	SELL	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	64.7K	¥2,261	+20.4%	¥52M ($334K)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	87.6K	¥2,261	-20.4%	¥41M ($264K)
2025-05-09	BUY	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	45.2K	¥2,261	-20.4%	¥44M ($283K)
2025-05-09	SELL	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	45.2K	¥2,261	+20.4%	¥44M ($283K)
2025-05-09	SELL	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	12.0K	¥2,261	+20.4%	¥75M ($484K)
2025-05-09	BUY	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	64.7K	¥2,261	-20.4%	¥52M ($334K)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2025-05-09	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥2,261	-20.4%	¥372M ($2.4M)
2024-10-18	SELL	Market Buy	山上豊 yamagami yutaka	passive	52.6K	¥1,900	+5.3%	¥163M ($1.0M)
2024-10-18	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	17.8K	¥1,900	+5.3%	¥35M ($226K)
2024-09-17	BUY	Market Buy	合同会社Happy horse Happy horse LLC	passive	36.2K	¥1,901	-5.4%	¥69M ($444K)
2024-09-17	BUY	Market Buy	山上豊 yamagami yutaka	passive	138.3K	¥1,901	-5.4%	¥263M ($1.7M)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	170.6K	¥1,859	-3.2%	¥312M ($2.0M)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	36.2K	¥1,859	+3.2%	¥59M ($378K)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	67.8K	¥1,859	+3.2%	¥37M ($241K)
2024-08-08	BUY	Market Buy	合同会社Happy horse Happy horse LLC	passive	36.2K	¥1,859	-3.2%	¥67M ($434K)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	36.2K	¥1,859	+3.2%	¥59M ($378K)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	67.8K	¥1,859	+3.2%	¥37M ($241K)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	87.8K	¥1,859	+3.2%	¥51M ($327K)
2024-08-08	SELL	Market Buy	合同会社Happy horse Happy horse LLC	passive	87.8K	¥1,859	+3.2%	¥51M ($327K)
2024-08-08	SELL	Market Buy	山上豊 yamagami yutaka	passive	138.3K	¥1,859	+3.2%	¥60M ($386K)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	250.6K	¥1,859	-3.2%	¥466M ($3.0M)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	170.6K	¥1,859	-3.2%	¥312M ($2.0M)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	250.6K	¥1,859	-3.2%	¥6M ($40K)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	250.6K	¥1,859	-3.2%	¥6M ($40K)
2024-08-08	BUY	Market Buy	山上豊 yamagami yutaka	passive	250.6K	¥1,859	-3.2%	¥466M ($3.0M)
2024-06-04	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥1,876	-4.1%	¥308M ($2.0M)
2024-06-04	BUY	unknown	有限会社大屋興産 Oya Kosan Co., Ltd.	other	105.7K	¥1,876	-4.1%	¥198M ($1.3M)
2024-06-04	BUY	unknown	大屋翼 OYA TSUBASA	other	164.3K	¥1,876	-4.1%	¥308M ($2.0M)
2024-05-17	BUY	Market Buy	合同会社Happy horse Happy horse LLC	passive	115.1K	¥1,900	-5.3%	¥219M ($1.4M)
2024-05-17	BUY	Market Buy	山上豊 yamagami yutaka	passive	247.4K	¥1,900	-5.3%	¥112M ($720K)
2024-05-13	SELL	Market Buy	山上豊 yamagami yutaka	passive	188.5K	¥1,957	+8.1%	¥78M ($505K)
2024-04-30	SELL	Market Buy	山上豊 yamagami yutaka	passive	188.5K	¥1,880	+4.3%	¥134M ($866K)
2024-04-30	BUY	Market Buy	山上豊 yamagami yutaka	passive	228.5K	¥1,880	-4.3%	¥75M ($485K)
2024-04-16	BUY	Market Buy	山上豊 yamagami yutaka	passive	260.0K	¥1,898	-5.2%	¥135M ($874K)
2024-04-16	BUY	Market Buy	山上豊 yamagami yutaka	passive	260.0K	¥1,898	-5.2%	¥135M ($874K)
2024-03-19	BUY	Market Buy	山上豊 yamagami yutaka	passive	188.5K	¥1,901	-5.4%	¥35M ($228K)
2024-03-19	BUY	Market Buy	山上豊 yamagami yutaka	passive	188.5K	¥1,901	-5.4%	¥35M ($228K)

Showing the 50 most recent of 59 filings.

Frequently asked questions

Who has been buying ONEX Corporation stock?: 8 distinct investors have filed 25 disclosed large-shareholding filings in ONEX Corporation (5987), most recently on 2025-06-09. 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 ONEX Corporation have?: ONEX Corporation has 25 buy-side and 18 sell-side disclosures on record, covering ¥3.0B ($19.1M) in total reported value, spanning 2021-07-07 to 2025-06-09.
Where does StockDrifts get ONEX 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 ONEX Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.