Who has been buying KOSAIDO Holdings Co., Ltd. stock?

7 distinct investors have filed 12 disclosed large-shareholding filings in KOSAIDO Holdings Co., Ltd. (7868), most recently on 2026-03-31. 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 KOSAIDO Holdings Co., Ltd. have?

KOSAIDO Holdings Co., Ltd. has 12 buy-side and 10 sell-side disclosures on record, covering ¥10.4B ($67.4M) in total reported value, spanning 2021-09-03 to 2026-03-31.

Where does StockDrifts get KOSAIDO 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.

KOSAIDO Holdings Co., Ltd. 7868

Company

株式会社廣済堂KOSAIDO Holdings Co., Ltd.

Investors

Buys

Total Value

¥10.4B ($67.4M)

Avg Return

+68.82%

Last Filing

2026-03-31

KOSAIDO Holdings Co., Ltd. (7868) has 12 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥10.4B ($67.4M) in reported transaction value. The earliest filing StockDrifts holds for KOSAIDO Holdings Co., Ltd. is dated 2021-09-03; the most recent is 2026-03-31. 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 +68.82%, 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
2026-03-31	BUY	Market Buy	R&Lホールディングス株式会社	activist	32.2M	¥487	+19.7%	¥1.6B ($10.4M)
2026-01-08	BUY	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	0	¥457	+11.8%	¥6.2B ($40.1M)
2026-01-08	SELL	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	0	¥457	-11.8%	¥6.2B ($40.1M)
2025-08-07	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	6.8M	¥459	-11.3%	¥901M ($5.8M)
2025-06-20	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	8.8M	¥437	-16.9%	¥769M ($5.0M)
2024-12-20	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	10.5M	¥502	+1.8%	¥731M ($4.7M)
2024-10-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	9.1M	¥523	+2.3%	¥784M ($5.1M)
2024-09-25	SELL	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	2.1K	¥512	+0.2%	¥74M ($476K)
2024-09-25	BUY	Market Buy	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	passive	9.6M	¥512	-0.2%	¥797M ($5.1M)
2024-04-05	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	147.7K	¥646	-20.9%	¥95M ($616K)
2024-04-05	BUY	Market Buy	SBIホールディングス株式会社 SBI Holdings Co., Ltd.	passive	8.1M	¥646	-20.9%	¥5.2B ($33.6M)
2024-02-07	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	10.5M	¥739	+30.9%	¥1.5B ($9.8M)
2023-07-07	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	2.5M	¥479.8	+6.5%	¥231M ($1.5M)
2023-06-29	SELL	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	2.7M	¥418.6	-22.1%	¥694M ($4.5M)
2023-06-06	SELL	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	4.3M	¥462.4	-10.5%	¥161M ($1.0M)
2023-05-22	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	2.0M	¥490.6	+4.2%	¥144M ($930K)
2023-05-12	SELL	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	4.7M	¥520	+1.7%	¥156M ($1.0M)
2023-05-10	BUY	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.7M	¥529.8	-3.5%	¥913M ($5.9M)
2023-05-02	SELL	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	5.0M	¥522.4	+2.2%	¥168M ($1.1M)
2023-05-02	BUY	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	5.0M	¥522.4	-2.2%	¥168M ($1.1M)
2022-12-01	BUY	unknown	R&Lホールディングス株式会社 R&L Holdings Co., Ltd.	activist	5.5M	¥378.2	+35.1%	¥2.1B ($13.5M)
2022-02-07	BUY	unknown	R&Lホールディングス株式会社 R&L Holdings Co., Ltd.	activist	5.5M	¥155.4	+228.8%	¥327M ($2.1M)
2022-02-07	BUY	Market Buy	R&Lホールディングス株式会社 R&L Holdings Co., Ltd.	activist	5.5M	¥155.4	+228.8%	¥409M ($2.6M)
2022-02-07	BUY	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	5.3M	¥155.4	+228.8%	¥826M ($5.3M)
2022-02-07	BUY	Market Buy	ピーエー・エース・フォー(エイチケー)リミテッド PA Ace IV (HK) Limited	passive	5.3M	¥155.4	+228.8%	¥826M ($5.3M)
2021-09-03	BUY	unknown	合同会社ADSKホールディングス ADSK Holdings LLC	strategic	100	¥202.2	+152.7%	¥20K ($130)
2021-09-03	BUY	unknown	株式会社麻生 ASO CORPORATION	strategic	2.7M	¥202.2	+152.7%	¥536M ($3.5M)

Frequently asked questions

Who has been buying KOSAIDO Holdings Co., Ltd. stock?: 7 distinct investors have filed 12 disclosed large-shareholding filings in KOSAIDO Holdings Co., Ltd. (7868), most recently on 2026-03-31. 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 KOSAIDO Holdings Co., Ltd. have?: KOSAIDO Holdings Co., Ltd. has 12 buy-side and 10 sell-side disclosures on record, covering ¥10.4B ($67.4M) in total reported value, spanning 2021-09-03 to 2026-03-31.
Where does StockDrifts get KOSAIDO 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 KOSAIDO Holdings Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.