Who has been buying Mitachi Co., Ltd. stock?

10 distinct investors have filed 8 disclosed large-shareholding filings in Mitachi Co., Ltd. (3321), most recently on 2025-04-04. 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 Mitachi Co., Ltd. have?

Mitachi Co., Ltd. has 8 buy-side and 6 sell-side disclosures on record, covering ¥894M ($5.8M) in total reported value, spanning 2021-04-06 to 2025-04-04.

Where does StockDrifts get Mitachi 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.

Mitachi Co., Ltd. 3321

Company

ミタチ産業株式会社Mitachi Co., Ltd.

Investors

Buys

Total Value

¥894M ($5.8M)

Avg Return

+124.77%

Last Filing

2025-04-04

Mitachi Co., Ltd. (3321) has 8 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥894M ($5.8M) in reported transaction value. The earliest filing StockDrifts holds for Mitachi Co., Ltd. is dated 2021-04-06; the most recent is 2025-04-04. 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 +124.77%, 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
2025-04-04	BUY	unknown	株式会社JU JU Co., Ltd.	activist	1.9M	¥1,067	+76.4%	¥89M ($576K)
2025-04-04	BUY	unknown	株式会社JU JU Co., Ltd.	activist	1.9M	¥1,067	+76.4%	¥89M ($576K)
2025-04-04	SELL	unknown	橘和博 Kazuhiro Tachibana	activist	123.4K	¥1,067	-76.4%	¥109M ($702K)
2025-04-04	SELL	unknown	橘和博 Kazuhiro Tachibana	activist	123.4K	¥1,067	-76.4%	¥109M ($702K)
2023-04-07	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	4.2K	¥1,289	-46.0%	¥62M ($397K)
2023-04-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	286.5K	¥1,289	+46.0%	¥365M ($2.4M)
2022-10-31	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	48.4K	¥944	-99.4%	¥8M ($53K)
2022-10-31	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	31.9K	¥944	+99.4%	¥16M ($102K)
2022-10-31	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	35.5K	¥944	-99.4%	¥73M ($470K)
2022-10-31	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	200.0K	¥944	-99.4%	¥13M ($82K)
2021-12-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	51.7K	¥921	+104.3%	¥48M ($307K)
2021-12-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	362.6K	¥921	+104.3%	¥334M ($2.2M)
2021-04-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.6K	¥544.413	+245.7%	¥818K ($5K)
2021-04-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	162.5K	¥544.413	+245.7%	¥88M ($566K)

Frequently asked questions

Who has been buying Mitachi Co., Ltd. stock?: 10 distinct investors have filed 8 disclosed large-shareholding filings in Mitachi Co., Ltd. (3321), most recently on 2025-04-04. 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 Mitachi Co., Ltd. have?: Mitachi Co., Ltd. has 8 buy-side and 6 sell-side disclosures on record, covering ¥894M ($5.8M) in total reported value, spanning 2021-04-06 to 2025-04-04.
Where does StockDrifts get Mitachi 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 Mitachi Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.