Who has been buying SAKAI Holdings CO.,LTD stock?

8 distinct investors have filed 5 disclosed large-shareholding filings in SAKAI Holdings CO.,LTD (9446), most recently on 2025-07-22. 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 SAKAI Holdings CO.,LTD have?

SAKAI Holdings CO.,LTD has 5 buy-side and 14 sell-side disclosures on record, covering ¥2.6B ($16.8M) in total reported value, spanning 2021-04-15 to 2025-07-22.

Where does StockDrifts get SAKAI 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.

SAKAI Holdings CO.,LTD 9446

Company

株式会社サカイホールディングスSAKAI Holdings CO.,LTD

Investors

Buys

Total Value

¥2.6B ($16.8M)

Avg Return

+38.15%

Last Filing

2025-07-22

SAKAI Holdings CO.,LTD (9446) has 5 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥2.6B ($16.8M) in reported transaction value. The earliest filing StockDrifts holds for SAKAI Holdings CO.,LTD is dated 2021-04-15; the most recent is 2025-07-22. 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 +38.15%, 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
2025-07-22	SELL	unknown	VTホールディングス株式会社 VT HOLDINGS CO.,LTD.	other	0	¥459	-58.8%	¥289M ($1.9M)
2025-07-18	SELL	unknown	株式会社エスアイエル SIL Co., Ltd.	unknown	0	¥460	-58.5%	¥112M ($725K)
2025-07-18	SELL	unknown	株式会社UH Partners 2 UH Partners 2, Inc.	unknown	0	¥460	-58.5%	¥277M ($1.8M)
2025-07-18	SELL	unknown	光通信株式会社 Hikari Tsushin K.K.	unknown	0	¥460	-58.5%	¥170M ($1.1M)
2025-06-27	BUY	unknown	VTホールディングス株式会社 VT HOLDINGS.CO.LTD	other	629.1K	¥460	+58.5%	¥289M ($1.9M)
2025-06-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	244.6K	¥456	+59.9%	¥112M ($720K)
2025-06-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥456	+59.9%	¥274M ($1.8M)
2025-06-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	369.4K	¥456	+59.9%	¥168M ($1.1M)
2025-06-03	SELL	unknown	VTホールディングス株式会社 VT HOLDINGS.CO.LTD	other	629.1K	¥436	-67.2%	¥3M ($18K)
2025-05-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥431	+69.1%	¥259M ($1.7M)
2025-05-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	369.4K	¥431	+69.1%	¥159M ($1.0M)
2025-05-29	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	244.6K	¥431	+69.1%	¥105M ($680K)
2024-08-16	BUY	unknown	酒井比都美 Hitomi Sakai	other	54.0K	¥480	+51.9%	¥26M ($167K)
2024-08-16	BUY	unknown	酒井俊光 sakai toshimitu	strategic	579.2K	¥480	+51.9%	¥274M ($1.8M)
2024-08-16	BUY	unknown	酒井比都美 Hitomi Sakai	other	54.0K	¥480	+51.9%	¥26M ($167K)
2024-08-16	BUY	unknown	酒井比都美 Hitomi Sakai	other	54.0K	¥480	+51.9%	¥26M ($167K)
2024-08-16	SELL	unknown	酒井俊光 sakai toshimitu	strategic	579.2K	¥480	-51.9%	¥94M ($604K)
2024-08-16	SELL	unknown	酒井俊光 sakai toshimitu	strategic	579.2K	¥480	-51.9%	¥94M ($604K)
2024-06-12	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	244.6K	¥496	+47.0%	¥121M ($783K)
2024-06-12	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥496	+47.0%	¥298M ($1.9M)
2024-06-12	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	369.4K	¥496	-47.0%	¥200M ($1.3M)
2024-03-12	BUY	Market Buy	株式会社サンワ Sanwa Co., Ltd.	activist	3.4M	¥524	+39.1%	¥1.8B ($11.5M)
2024-02-26	BUY	Market Buy	株式会社サカイ SAKAI Co.,Ltd	passive	236.0K	¥525	+38.9%	¥124M ($799K)
2024-02-26	BUY	Market Buy	株式会社サカイ SAKAI Co.,Ltd	passive	236.0K	¥525	+38.9%	¥124M ($799K)
2024-02-21	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	activist	236.0K	¥524	+39.1%	¥124M ($798K)
2024-02-21	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	activist	236.0K	¥524	+39.1%	¥124M ($798K)
2022-12-22	BUY	Market Buy	株式会社サンワ Sanwa Co., Ltd.	activist	3.4M	¥537	+35.8%	¥1.8B ($11.8M)
2022-12-22	BUY	Market Buy	株式会社サンワ Sanwa Co., Ltd.	activist	3.4M	¥537	+35.8%	¥1.8B ($11.8M)
2022-10-28	BUY	unknown	酒井比都美 Hitomi Sakai	other	54.0K	¥531	+37.3%	¥29M ($185K)
2022-10-28	SELL	unknown	酒井比都美 Hitomi Sakai	other	54.0K	¥531	-37.3%	¥582K ($4K)
2022-10-28	SELL	Market Buy	酒井比都美 Hitomi Sakai	other	54.0K	¥531	-37.3%	¥5M ($33K)
2022-10-28	BUY	Market Buy	酒井俊光 sakai toshimitu	strategic	829.0K	¥531	+37.3%	¥74M ($476K)
2022-10-28	SELL	unknown	酒井俊光 sakai toshimitu	strategic	829.0K	¥531	-37.3%	¥2M ($15K)
2022-10-28	SELL	unknown	酒井俊光 sakai toshimitu	strategic	775.1K	¥531	-37.3%	¥27M ($176K)
2022-05-31	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	passive	3.6M	¥587	+24.2%	¥2.1B ($13.8M)
2022-05-30	BUY	unknown	株式会社サカイ SAKAI Co., Ltd	activist	3.6M	¥591	+23.4%	¥2.1B ($13.9M)
2022-05-30	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	passive	3.6M	¥591	+23.4%	¥2.1B ($13.9M)
2022-05-30	BUY	Market Buy	株式会社サンワ Sanwa Co., Ltd.	passive	3.4M	¥591	+23.4%	¥2.0B ($13.0M)
2022-05-30	SELL	Market Buy	株式会社サカイ SAKAI Co., Ltd	passive	236.0K	¥591	-23.4%	¥2.0B ($13.0M)
2022-05-30	BUY	unknown	株式会社サカイ SAKAI Co., Ltd	activist	3.6M	¥591	+23.4%	¥2.1B ($13.9M)
2022-05-30	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	passive	3.6M	¥591	+23.4%	¥2.1B ($13.9M)
2022-05-30	BUY	Market Buy	株式会社サカイ SAKAI Co., Ltd	passive	236.0K	¥591	+23.4%	¥2.0B ($13.0M)
2022-05-30	BUY	Market Buy	株式会社サンワ Sanwa Co., Ltd.	passive	3.4M	¥591	+23.4%	¥2.0B ($13.0M)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	772.3K	¥636	-14.6%	¥155M ($1.0M)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	244.6K	¥636	+14.6%	¥156M ($1.0M)
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥636	+14.6%	¥383M ($2.5M)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥605	+20.5%	¥364M ($2.3M)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.0M	¥605	+20.5%	¥615M ($4.0M)
2021-04-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	601.6K	¥616	+18.3%	¥371M ($2.4M)
2021-04-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	1.0M	¥616	+18.3%	¥626M ($4.0M)

Frequently asked questions

Who has been buying SAKAI Holdings CO.,LTD stock?: 8 distinct investors have filed 5 disclosed large-shareholding filings in SAKAI Holdings CO.,LTD (9446), most recently on 2025-07-22. 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 SAKAI Holdings CO.,LTD have?: SAKAI Holdings CO.,LTD has 5 buy-side and 14 sell-side disclosures on record, covering ¥2.6B ($16.8M) in total reported value, spanning 2021-04-15 to 2025-07-22.
Where does StockDrifts get SAKAI 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 SAKAI Holdings CO.,LTD. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.