Who has been buying Mito Securities Co., Ltd. stock?

4 distinct investors have filed 4 disclosed large-shareholding filings in Mito Securities Co., Ltd. (8622), most recently on 2025-07-07. 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 Mito Securities Co., Ltd. have?

Mito Securities Co., Ltd. has 4 buy-side and 6 sell-side disclosures on record, covering ¥349M ($2.3M) in total reported value, spanning 2021-12-07 to 2025-07-07.

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.

Mito Securities Co., Ltd. 8622

Company

水戸証券(株)Mito Securities Co., Ltd.

Investors

Buys

Total Value

¥349M ($2.3M)

Avg Return

+66.56%

Last Filing

2025-07-07

Mito Securities Co., Ltd. (8622) has 4 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥349M ($2.3M) in reported transaction value. The earliest filing StockDrifts holds for Mito Securities Co., Ltd. is dated 2021-12-07; the most recent is 2025-07-07. Across these filings the average return since disclosure is +66.56%, 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
2026-09-07	SELL	unknown	アセットマネジメントOne株式会社	other	919.2K	¥980	+4.4%	¥193M ($1.2M)
2026-09-07	BUY	Market Buy	みずほ信託銀行株式会社	other	1.3M	¥980	-4.4%	¥830M ($5.4M)
2026-09-07	BUY	unknown	株式会社みずほ銀行	strategic	2.0M	¥980	-	-
2025-07-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥560	-	-
2025-07-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	501.2K	¥560	-67.3%	¥493M ($3.2M)
2025-07-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥560	-67.3%	¥129M ($831K)
2024-10-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥503	+86.3%	¥73M ($469K)
2024-10-07	BUY	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	1.4M	¥503	+86.3%	¥459M ($3.0M)
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	1.3M	¥503	+86.3%	¥178M ($1.2M)
2022-07-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥259	-	-
2022-07-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	unknown	0	¥259	-261.8%	¥26M ($165K)
2022-07-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	501.1K	¥259	-261.8%	¥198M ($1.3M)
2022-07-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥259	-261.8%	¥13M ($83K)
2021-12-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	2.0M	¥288	-	-
2021-12-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	95.9K	¥288	-	-
2021-12-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	1.3M	¥288	+225.3%	¥171M ($1.1M)
2021-12-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.1M	¥288	-225.3%	¥202M ($1.3M)

Frequently asked questions

Who has been buying Mito Securities Co., Ltd. stock?: 4 distinct investors have filed 4 disclosed large-shareholding filings in Mito Securities Co., Ltd. (8622), most recently on 2025-07-07. 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 Mito Securities Co., Ltd. have?: Mito Securities Co., Ltd. has 4 buy-side and 6 sell-side disclosures on record, covering ¥349M ($2.3M) in total reported value, spanning 2021-12-07 to 2025-07-07.
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.