Who has been buying Japan Medical Dynamic Marketing, Inc. stock?

5 distinct investors have filed 2 disclosed large-shareholding filings in Japan Medical Dynamic Marketing, Inc. (7600), most recently on 2023-12-05. 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 Japan Medical Dynamic Marketing, Inc. have?

Japan Medical Dynamic Marketing, Inc. has 2 buy-side and 6 sell-side disclosures on record, covering ¥16.3B ($105.4M) in total reported value, spanning 2021-03-24 to 2023-12-05.

Where does StockDrifts get Japan Medical Dynamic Marketing, Inc. 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.

Japan Medical Dynamic Marketing, Inc. 7600

Company

株式会社日本エム・ディ・エムJapan Medical Dynamic Marketing, Inc.

Investors

Buys

Total Value

¥16.3B ($105.4M)

Avg Return

-72.09%

Last Filing

2023-12-05

Japan Medical Dynamic Marketing, Inc. (7600) has 2 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥16.3B ($105.4M) in reported transaction value. The earliest filing StockDrifts holds for Japan Medical Dynamic Marketing, Inc. is dated 2021-03-24; the most recent is 2023-12-05. 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 -72.09%, 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
2026-07-07	BUY	unknown	野村アセットマネジメント株式会社	other	494.3K	¥889	+1.6%	¥439M ($2.8M)
2026-07-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.5M	¥889	+1.6%	¥1.4B ($8.8M)
2026-07-07	BUY	unknown	野村證券株式会社	other	8.2K	¥889	+1.6%	¥7M ($47K)
2023-12-05	BUY	negotiated	三井化学株式会社 Mitsui Chemicals, Inc.	strategic	7.9M	¥707	-20.2%	¥5.6B ($36.2M)
2023-08-03	SELL	unknown	ニュートン・インベストメント・マネジメント・ジャパン株式会社 Newton Investment Management Japan Ltd.	other	1.1M	¥860	+34.4%	¥389M ($2.5M)
2023-07-13	SELL	unknown	ニュートン・インベストメント・マネジメント・ジャパン株式会社 Newton Investment Management Japan Ltd.	other	1.5M	¥983	+42.6%	¥278M ($1.8M)
2023-05-25	SELL	unknown	ニュートン・インベストメント・マネジメント・ジャパン株式会社 Newton Investment Management Japan Ltd.	other	1.8M	¥965	+41.5%	¥493M ($3.2M)
2023-03-17	BUY	unknown	ニュートン・インベストメント・マネジメント・ジャパン株式会社 Newton Investment Management Japan Ltd.	other	2.3M	¥1,023	-44.9%	¥2.4B ($15.3M)
2023-03-17	SELL	unknown	BNYメロン・インベストメント・マネジメント・ジャパン株式会社 BNY Mellon Investment Management Japan Limited	other	0	¥1,023	+44.9%	¥2.2B ($14.2M)
2022-01-11	SELL	unknown	日本特殊陶業株式会社 NGK SPARK PLUG CO., LTD.	unknown	0	¥1,722	+67.3%	¥13.7B ($88.2M)
2021-12-13	BUY	acquisition	三井化学株式会社 Mitsui Chemicals, Inc.	strategic	7.9M	¥1,944	-71.0%	¥15.4B ($99.6M)
2021-12-08	BUY	unknown	日本特殊陶業株式会社 NGK SPARK PLUG CO., LTD.	strategic	7.9M	¥1,996	-71.7%	¥15.9B ($102.3M)
2021-03-25	BUY	Market Buy	BNYメロン・インベストメント・マネジメント・ジャパン株式会社 BNY Mellon Investment Management Japan Limited	other	2.2M	¥2,103.18	-73.2%	¥891M ($5.7M)
2021-03-24	SELL	unknown	渡邉崇史 Takashi Watanabe	strategic	1.2M	¥2,050.834	+72.5%	¥570M ($3.7M)

Frequently asked questions

Who has been buying Japan Medical Dynamic Marketing, Inc. stock?: 5 distinct investors have filed 2 disclosed large-shareholding filings in Japan Medical Dynamic Marketing, Inc. (7600), most recently on 2023-12-05. 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 Japan Medical Dynamic Marketing, Inc. have?: Japan Medical Dynamic Marketing, Inc. has 2 buy-side and 6 sell-side disclosures on record, covering ¥16.3B ($105.4M) in total reported value, spanning 2021-03-24 to 2023-12-05.
Where does StockDrifts get Japan Medical Dynamic Marketing, Inc. 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 Japan Medical Dynamic Marketing, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.