Who has been buying Mitsuuroko Group Holdings Co.,Ltd. stock?

5 distinct investors have filed 21 disclosed large-shareholding filings in Mitsuuroko Group Holdings Co.,Ltd. (8131), most recently on 2026-04-22. 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 Mitsuuroko Group Holdings Co.,Ltd. have?

Mitsuuroko Group Holdings Co.,Ltd. has 21 buy-side and 26 sell-side disclosures on record, covering ¥3.8B ($24.6M) in total reported value, spanning 2021-09-24 to 2026-04-22.

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.

Mitsuuroko Group Holdings Co.,Ltd. 8131

Company

株式会社ミツウロコグループホールディングスMitsuuroko Group Holdings Co.,Ltd.

Investors

Buys

Total Value

¥3.8B ($24.6M)

Avg Return

+41.61%

Last Filing

2026-04-22

Mitsuuroko Group Holdings Co.,Ltd. (8131) has 21 disclosed large-shareholding filings and 26 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥3.8B ($24.6M) in reported transaction value. The earliest filing StockDrifts holds for Mitsuuroko Group Holdings Co.,Ltd. is dated 2021-09-24; the most recent is 2026-04-22. Across these filings the average return since disclosure is +41.61%, 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
2026-07-23	BUY	unknown	株式会社みずほ銀行	strategic	2.6M	¥2,046	-	-
2026-07-23	BUY	unknown	みずほ信託銀行株式会社	strategic	687.3K	¥2,046	-	-
2026-07-23	BUY	unknown	みずほ証券株式会社	other	1.3M	¥2,046	-	-
2026-07-23	BUY	Market Buy	アセットマネジメントOne株式会社	other	470.8K	¥2,046	+20.8%	¥12M ($75K)
2026-07-07	BUY	unknown	株式会社みずほ銀行	strategic	2.6M	¥2,142	-	-
2026-07-07	SELL	unknown	みずほ証券株式会社	other	1.3M	¥2,142	-15.4%	¥37M ($237K)
2026-07-07	BUY	unknown	みずほ信託銀行株式会社	strategic	687.3K	¥2,142	-	-
2026-07-07	SELL	unknown	アセットマネジメントOne株式会社	other	470.1K	¥2,142	-15.4%	¥12M ($79K)
2026-04-22	BUY	unknown	株式会社みずほ銀行	strategic	2.6M	¥2,077	-	-
2026-04-22	BUY	Market Buy	みずほ証券株式会社	other	1.4M	¥2,077	+19.0%	¥24M ($153K)
2026-04-22	BUY	unknown	みずほ信託銀行株式会社	strategic	687.3K	¥2,077	-	-
2026-04-22	SELL	unknown	アセットマネジメントOne株式会社	other	473.2K	¥2,077	-19.0%	¥47M ($306K)
2026-02-20	SELL	unknown	株式会社みずほ銀行	strategic	2.6M	¥2,295	-7.7%	¥458M ($3.0M)
2026-02-20	BUY	unknown	みずほ証券株式会社	other	1.3M	¥2,295	+7.7%	¥223M ($1.4M)
2026-02-20	SELL	unknown	みずほ信託銀行株式会社	strategic	687.3K	¥2,295	-7.7%	¥92M ($591K)
2026-02-20	SELL	unknown	アセットマネジメントOne株式会社	other	493.7K	¥2,295	-7.7%	¥26M ($169K)
2025-11-14	SELL	unknown	ENEOSホールディングス株式会社 ENEOS Holdings, Inc.	strategic	2.3M	¥2,240	-10.4%	¥1.3B ($8.6M)
2025-07-23	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.8M	¥2,216	-	-
2025-07-23	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥2,216	+11.6%	¥13M ($82K)
2025-07-23	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥2,216	-	-
2025-07-23	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	505.9K	¥2,216	-11.6%	¥101M ($653K)
2025-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	553.6K	¥1,827	-35.3%	¥52M ($336K)
2025-04-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.8M	¥1,827	-	-
2025-04-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥1,827	-35.3%	¥21M ($135K)
2025-04-22	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,827	-	-
2025-04-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.8M	¥1,555	+59.0%	¥231M ($1.5M)
2025-04-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.3M	¥1,555	+59.0%	¥106M ($687K)
2025-04-07	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,555	+59.0%	¥53M ($343K)
2025-04-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	579.3K	¥1,555	+59.0%	¥18M ($114K)
2025-02-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.8M	¥1,817	-36.0%	¥219M ($1.4M)
2025-02-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥1,817	-	-
2025-02-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,817	-	-
2025-02-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	599.3K	¥1,817	-36.0%	¥22M ($141K)
2024-11-15	SELL	unknown	ENEOSホールディングス株式会社 ENEOS Holdings, Inc.	strategic	3.1M	¥1,657	-49.2%	¥1.2B ($8.0M)
2024-10-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	3.0M	¥1,815	-	-
2024-10-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥1,815	+36.2%	¥11M ($70K)
2024-10-07	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,815	-	-
2024-10-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	612.6K	¥1,815	-	-
2024-08-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥1,724	-43.4%	¥10M ($67K)
2024-08-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	3.0M	¥1,724	-	-
2024-08-22	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,724	-	-
2024-08-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	613.3K	¥1,724	-43.4%	¥21M ($134K)
2024-07-05	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	3.0M	¥1,754	-	-
2024-07-05	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.2M	¥1,754	-40.9%	¥11M ($68K)
2024-07-05	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,754	-	-
2024-07-05	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	624.8K	¥1,754	+40.9%	¥316M ($2.0M)
2024-06-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	3.0M	¥1,469	-	-
2024-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	443.0K	¥1,469	+68.3%	¥27M ($171K)
2024-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.3M	¥1,469	-	-
2024-06-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	725.3K	¥1,469	-	-

Showing the 50 most recent of 83 filings.

Frequently asked questions

Who has been buying Mitsuuroko Group Holdings Co.,Ltd. stock?: 5 distinct investors have filed 21 disclosed large-shareholding filings in Mitsuuroko Group Holdings Co.,Ltd. (8131), most recently on 2026-04-22. 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 Mitsuuroko Group Holdings Co.,Ltd. have?: Mitsuuroko Group Holdings Co.,Ltd. has 21 buy-side and 26 sell-side disclosures on record, covering ¥3.8B ($24.6M) in total reported value, spanning 2021-09-24 to 2026-04-22.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.