Who has been buying Japan Electronic Materials Corporation stock?

23 distinct investors have filed 128 disclosed large-shareholding filings in Japan Electronic Materials Corporation (6855), 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 Japan Electronic Materials Corporation have?

Japan Electronic Materials Corporation has 128 buy-side and 119 sell-side disclosures on record, covering ¥83.0B ($535.2M) in total reported value, spanning 2021-03-18 to 2026-04-22.

Where does StockDrifts get Japan Electronic Materials Corporation 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 Electronic Materials Corporation 6855

Company

日本電子材料株式会社Japan Electronic Materials Corporation

Investors

Buys

128

Total Value

¥83.0B ($535.2M)

Avg Return

+183.25%

Last Filing

2026-04-22

Japan Electronic Materials Corporation (6855) has 128 disclosed large-shareholding filings and 119 disclosed disposals on record, filed by 23 distinct investors. Together those filings cover ¥83.0B ($535.2M) in reported transaction value. The earliest filing StockDrifts holds for Japan Electronic Materials Corporation is dated 2021-03-18; the most recent is 2026-04-22. 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 +183.25%, 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
2026-08-06	BUY	Market Buy	モルガン・スタンレー・アンド・カンパニー・エルエルシー Morgan Stanley & Co. LLC	other	208.1K	¥6,720	+3.9%	¥20M ($127K)
2026-08-06	BUY	Market Buy	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	547.5K	¥6,720	+3.9%	¥39M ($254K)
2026-07-22	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・エルエルシー Morgan Stanley & Co. LLC	other	204.7K	¥6,500	+7.4%	¥1.3B ($8.6M)
2026-07-22	BUY	unknown	モルガン・スタンレー・アンド・カンパニー・インターナショナル・ピーエルシー Morgan Stanley & Co. International plc	other	541.7K	¥6,500	+7.4%	¥3.5B ($22.7M)
2026-07-06	SELL	unknown	野村アセットマネジメント株式会社	other	777.0K	¥7,460	+2.4%	¥175M ($1.1M)
2026-07-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	15.6K	¥7,460	+2.4%	¥864M ($5.6M)
2026-07-06	SELL	unknown	野村證券株式会社	other	81.8K	¥7,460	+2.4%	¥809M ($5.2M)
2026-06-22	SELL	unknown	野村アセットマネジメント株式会社	other	801.2K	¥8,990	+33.7%	¥659M ($4.3M)
2026-06-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	131.5K	¥8,990	+33.7%	¥1.1B ($6.9M)
2026-06-22	BUY	Market Buy	野村證券株式会社	other	190.2K	¥8,990	-33.7%	¥989M ($6.4M)
2026-06-05	BUY	Market Buy	野村アセットマネジメント株式会社	other	874.3K	¥7,720	+0.4%	¥792M ($5.1M)
2026-06-05	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	250.6K	¥7,720	-0.4%	¥1.1B ($7.2M)
2026-06-05	BUY	Market Buy	野村證券株式会社	other	80.3K	¥7,720	+0.4%	¥11M ($73K)
2026-06-04	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	284.5K	¥7,790	-0.5%	¥2.2B ($14.3M)
2026-06-04	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社	other	658.8K	¥7,790	-0.5%	¥5.1B ($33.1M)
2026-05-19	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	394.8K	¥7,020	+9.7%	¥2.3B ($14.5M)
2026-05-19	SELL	unknown	野村アセットマネジメント株式会社	other	771.9K	¥7,020	-9.7%	¥226M ($1.5M)
2026-05-19	SELL	unknown	野村證券株式会社	other	79.3K	¥7,020	-9.7%	¥10M ($66K)
2026-04-22	SELL	unknown	野村アセットマネジメント株式会社	other	804.0K	¥6,290	-21.1%	¥443M ($2.9M)
2026-04-22	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	72.7K	¥6,290	+21.1%	¥304M ($2.0M)
2026-04-22	BUY	unknown	野村證券株式会社	other	80.6K	¥6,290	+21.1%	¥507M ($3.3M)
2026-04-03	BUY	unknown	野村證券株式会社	other	81.0K	¥5,850	+18.3%	¥474M ($3.1M)
2026-04-03	SELL	unknown	野村アセットマネジメント株式会社	other	873.3K	¥5,850	-18.3%	¥686M ($4.4M)
2026-04-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	25.1K	¥5,850	+18.3%	¥43M ($277K)
2026-03-23	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	15.2K	¥6,120	-7.0%	¥100M ($642K)
2026-03-23	BUY	unknown	野村アセットマネジメント株式会社	other	855.7K	¥6,120	+7.0%	¥5.6B ($36.2M)
2026-03-23	SELL	unknown	野村證券株式会社	other	-212.3K	¥6,120	-7.0%	¥1.4B ($9.0M)
2026-03-12	BUY	negotiated	大久保佳奈	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保雄人	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保麗子	strategic	33.1K	¥7,050	+7.1%	¥217M ($1.4M)
2026-03-12	BUY	negotiated	大久保英正	strategic	213.6K	¥7,050	+7.1%	¥1.4B ($9.0M)
2026-03-12	BUY	negotiated	大久保ちどり	strategic	10.9K	¥7,050	+7.1%	¥71M ($460K)
2026-03-12	BUY	negotiated	大久保和正	activist	511.3K	¥7,050	+7.1%	¥3.3B ($21.6M)
2026-03-12	SELL	negotiated	有限会社大久保興産	strategic	427.0K	¥7,050	+7.1%	¥2.8B ($18.0M)
2026-03-12	BUY	negotiated	大久保佳奈	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保雄人	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保麗子	strategic	33.1K	¥7,050	+7.1%	¥217M ($1.4M)
2026-03-12	BUY	negotiated	大久保英正	strategic	213.6K	¥7,050	+7.1%	¥1.4B ($9.0M)
2026-03-12	BUY	negotiated	大久保ちどり	strategic	10.9K	¥7,050	+7.1%	¥71M ($460K)
2026-03-12	BUY	negotiated	大久保和正	activist	511.3K	¥7,050	+7.1%	¥3.3B ($21.6M)
2026-03-12	SELL	negotiated	有限会社大久保興産	strategic	427.0K	¥7,050	+7.1%	¥2.8B ($18.0M)
2026-03-12	BUY	negotiated	大久保佳奈	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保雄人	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保麗子	strategic	33.1K	¥7,050	+7.1%	¥217M ($1.4M)
2026-03-12	BUY	negotiated	大久保英正	strategic	213.6K	¥7,050	+7.1%	¥1.4B ($9.0M)
2026-03-12	BUY	negotiated	大久保ちどり	strategic	10.9K	¥7,050	+7.1%	¥71M ($460K)
2026-03-12	BUY	negotiated	大久保和正	activist	511.3K	¥7,050	+7.1%	¥3.3B ($21.6M)
2026-03-12	SELL	negotiated	有限会社大久保興産	strategic	427.0K	¥7,050	+7.1%	¥2.8B ($18.0M)
2026-03-12	BUY	negotiated	大久保佳奈	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)
2026-03-12	BUY	negotiated	大久保雄人	strategic	23.1K	¥7,050	+7.1%	¥151M ($976K)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Japan Electronic Materials Corporation stock?: 23 distinct investors have filed 128 disclosed large-shareholding filings in Japan Electronic Materials Corporation (6855), 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 Japan Electronic Materials Corporation have?: Japan Electronic Materials Corporation has 128 buy-side and 119 sell-side disclosures on record, covering ¥83.0B ($535.2M) in total reported value, spanning 2021-03-18 to 2026-04-22.
Where does StockDrifts get Japan Electronic Materials Corporation 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 Electronic Materials Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.