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

12 distinct investors have filed 24 disclosed large-shareholding filings in MCJ Co., Ltd. (6670), 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 MCJ Co., Ltd. have?

MCJ Co., Ltd. has 24 buy-side and 11 sell-side disclosures on record, covering ¥176.4B ($1.1B) in total reported value, spanning 2021-04-30 to 2026-04-22.

Where does StockDrifts get MCJ 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.

MCJ Co., Ltd. 6670

Company

株式会社MCJMCJ Co., Ltd.

Investors

Buys

Total Value

¥176.4B ($1.1B)

Avg Return

+72.92%

Last Filing

2026-04-22

MCJ Co., Ltd. (6670) has 24 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥176.4B ($1.1B) in reported transaction value. The earliest filing StockDrifts holds for MCJ Co., Ltd. is dated 2021-04-30; 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 +72.92%, 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
2026-06-16	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	385.5K	¥2,184	+0.0%	¥842M ($5.4M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	3.7M	¥2,184	+0.0%	¥1.8B ($11.3M)
2026-06-16	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	441.4K	¥2,184	+0.0%	¥964M ($6.2M)
2026-06-16	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	5.1M	¥2,184	+0.0%	¥11.2B ($72.5M)
2026-06-16	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	2.6M	¥2,184	+0.0%	¥5.7B ($36.6M)
2026-06-16	BUY	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	2.5M	¥2,184	+0.0%	¥5.6B ($35.9M)
2026-06-16	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	165.0K	¥2,184	+0.0%	¥360M ($2.3M)
2026-06-16	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	3.2M	¥2,184	+0.0%	¥1.4B ($8.7M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	2.9M	¥2,184	+0.0%	¥778M ($5.0M)
2026-06-16	BUY	Market Buy	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	441.4K	¥2,184	+0.0%	¥600M ($3.9M)
2026-06-16	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	176.9K	¥2,184	+0.0%	¥386M ($2.5M)
2026-06-16	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	3.3M	¥2,184	+0.0%	¥111M ($717K)
2026-06-16	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	302.3K	¥2,184	+0.0%	¥289M ($1.9M)
2026-06-16	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	2.1M	¥2,184	+0.0%	¥2.5B ($15.9M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	4.6M	¥2,184	+0.0%	¥1.9B ($12.0M)
2026-06-16	BUY	Market Buy	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	531.5K	¥2,184	+0.0%	¥200M ($1.3M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	385.5K	¥2,184	+0.0%	¥178M ($1.1M)
2026-06-16	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	2.6M	¥2,184	+0.0%	¥956M ($6.2M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	5.1M	¥2,184	+0.0%	¥1.1B ($7.3M)
2026-06-16	BUY	Market Buy	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	802.0K	¥2,184	+0.0%	¥600M ($3.9M)
2026-06-16	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	2.8M	¥2,184	+0.0%	¥556M ($3.6M)
2026-06-16	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	5.8M	¥2,184	+0.0%	¥1.6B ($10.5M)
2026-06-16	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	318.4K	¥2,184	+0.0%	¥1.1B ($6.9M)
2026-06-16	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	340.0K	¥2,184	+0.0%	¥5.4B ($35.1M)
2026-06-16	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	644.9K	¥2,184	+0.0%	¥11.3B ($73.0M)
2026-05-20	BUY	acquisition	クレディアンドスリエルエコメルシアル(CREDIT INDUSTRIEL ET COMMERCIAL) CREDIT INDUSTRIEL ET COMMERCIAL	passive	6.9M	¥2,187	-0.1%	¥15.1B ($97.4M)
2026-04-22	BUY	Market Buy	野村アセットマネジメント株式会社	other	243.6K	¥2,183	+0.2%	¥311M ($2.0M)
2026-04-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	495.0K	¥2,183	-0.2%	¥8.3B ($53.5M)
2026-04-22	SELL	unknown	野村證券株式会社	other	42.3K	¥2,183	-0.2%	¥1.7B ($10.8M)
2026-04-14	BUY	acquisition	ビーシーピーイーメタケイマンエルピー(BCPE Meta Cayman, L.P.) BCPE Meta Cayman, L.P.	activist	70.8M	¥2,184	+0.1%	¥154.6B ($997.5M)
2026-04-14	BUY	unknown	ビーシーピーイーメタケイマンエルピー(BCPE Meta Cayman, L.P.) BCPE Meta Cayman, L.P.	activist	70.8M	¥2,184	+0.1%	¥154.6B ($997.5M)
2026-04-10	SELL	unknown	髙島勇二 Yuji Takashima	unknown	0	¥2,181	-0.2%	¥70.8B ($456.8M)
2026-03-23	BUY	unknown	野村アセットマネジメント株式会社	other	105.4K	¥2,220	-1.7%	¥230M ($1.5M)
2026-03-23	BUY	unknown	野村證券株式会社	other	800.7K	¥2,220	-1.7%	¥1.7B ($11.3M)
2026-03-23	BUY	unknown	バークレイズ・バンク・ピーエルシー Barclays Bank PLC	other	0	¥2,220	+1.7%	-
2026-03-23	SELL	unknown	バークレイズ・キャピタル・セキュリティーズ・リミテッド Barclays Capital Securities Ltd.	other	4.8M	¥2,220	+1.7%	¥10.6B ($68.2M)
2026-03-23	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	4.3M	¥2,220	-1.7%	¥9.4B ($60.5M)
2026-03-06	BUY	unknown	バークレイズ・キャピタル・セキュリティーズ・リミテッド(Barclays Capital Securities Ltd.) Barclays Capital Securities Ltd.	other	5.1M	¥2,276	-4.1%	¥11.7B ($75.2M)
2026-02-20	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.4M	¥2,357	+7.4%	¥20.0B ($128.9M)
2026-02-13	BUY	block_purchase	髙島勇二 Yuji Takashima	other	32.5M	¥2,266	-3.7%	¥46M ($298K)
2025-02-13	SELL	unknown	メロン・インベストメンツ・コーポレーション Mellon Investments Corporation	other	223.8K	¥1,320	-65.4%	¥27M ($173K)
2025-02-13	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	3.9M	¥1,320	-65.4%	¥1.4B ($8.8M)
2024-05-02	BUY	unknown	メロン・インベストメンツ・コーポレーション Mellon Investments Corporation	other	239.6K	¥1,329	+64.3%	¥14M ($87K)
2024-05-02	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	4.9M	¥1,329	+64.3%	¥6.5B ($41.8M)
2024-01-25	BUY	unknown	メロン・インベストメンツ・コーポレーション Mellon Investments Corporation	other	238.9K	¥1,250	+74.6%	¥38M ($246K)
2024-01-25	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	6.0M	¥1,250	+74.6%	¥7.4B ($47.8M)
2023-09-25	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	9.8M	¥1,132	+92.8%	¥1.3B ($8.1M)
2023-05-23	SELL	Market Buy	エルエスブイ・アセット・マネジメント(LSV Asset Management) LSV Asset Management	passive	4.2M	¥965	-126.2%	¥992M ($6.4M)
2023-04-21	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	8.7M	¥942	+131.7%	¥1.1B ($6.9M)
2023-03-17	SELL	unknown	メロン・インベストメンツ・コーポレーション Mellon Investments Corporation	other	208.0K	¥942	-131.7%	¥29M ($186K)

Showing the 50 most recent of 66 filings.

Frequently asked questions

Who has been buying MCJ Co., Ltd. stock?: 12 distinct investors have filed 24 disclosed large-shareholding filings in MCJ Co., Ltd. (6670), 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 MCJ Co., Ltd. have?: MCJ Co., Ltd. has 24 buy-side and 11 sell-side disclosures on record, covering ¥176.4B ($1.1B) in total reported value, spanning 2021-04-30 to 2026-04-22.
Where does StockDrifts get MCJ 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 MCJ Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.