Who has been buying MedRx Co., Ltd stock?

6 distinct investors have filed 18 disclosed large-shareholding filings in MedRx Co., Ltd (4586), most recently on 2025-08-21. 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 MedRx Co., Ltd have?

MedRx Co., Ltd has 18 buy-side and 57 sell-side disclosures on record, covering ¥8.0B ($51.9M) in total reported value, spanning 2021-06-09 to 2025-08-21.

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.

MedRx Co., Ltd 4586

Company

株式会社メドレックスMedRx Co., Ltd

Investors

Buys

Total Value

¥8.0B ($51.9M)

Avg Return

-36.02%

Last Filing

2025-08-21

MedRx Co., Ltd (4586) has 18 disclosed large-shareholding filings and 57 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥8.0B ($51.9M) in reported transaction value. The earliest filing StockDrifts holds for MedRx Co., Ltd is dated 2021-06-09; the most recent is 2025-08-21. Across these filings the average return since disclosure is -36.02%, 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
2026-09-15	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	7.1M	¥61	+3.3%	¥51M ($332K)
2026-08-31	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	8.0M	¥65	+9.2%	¥50M ($323K)
2026-08-13	BUY	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	8.8M	¥65	-	¥79M ($508K)
2026-08-13	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	8.8M	¥65	+9.2%	¥79M ($508K)
2026-07-30	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	10.2M	¥65	+9.2%	¥57M ($371K)
2026-07-30	BUY	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	10.2M	¥65	-	¥57M ($371K)
2026-07-27	BUY	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	11.2M	¥67	-	¥42M ($271K)
2026-07-27	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	11.2M	¥67	+11.9%	¥42M ($271K)
2026-07-23	BUY	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	11.9M	¥64	-	¥56M ($361K)
2026-07-23	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	11.9M	¥64	+7.8%	¥56M ($361K)
2026-07-17	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	12.9M	¥61	+3.3%	¥35M ($226K)
2026-07-14	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	13.5M	¥57	-3.5%	¥23M ($148K)
2026-07-09	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	14.0M	¥55	-7.3%	¥30M ($193K)
2026-06-29	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	14.7M	¥50	-18.0%	¥22M ($140K)
2026-06-12	BUY	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	15.2M	¥55	+7.3%	¥837M ($5.4M)
2025-08-21	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	2.8M	¥107	+44.9%	¥89M ($574K)
2025-08-18	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	3.9M	¥112	-	-
2025-08-18	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	3.7M	¥112	+47.3%	¥23M ($146K)
2025-08-14	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	3.9M	¥109	+45.9%	¥117M ($757K)
2025-07-29	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	5.0M	¥71	+16.9%	¥58M ($376K)
2025-07-16	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	5.9M	¥74	+20.3%	¥27M ($176K)
2025-07-10	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	6.3M	¥72	+18.1%	¥60M ($385K)
2025-07-10	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	6.3M	¥72	-	¥60M ($385K)
2025-06-30	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	7.2M	¥74	+20.3%	¥55M ($358K)
2025-06-23	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	8.1M	¥65	+9.2%	¥18M ($114K)
2025-06-05	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	8.3M	¥61	+3.3%	¥31M ($203K)
2025-06-05	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	8.3M	¥61	-	¥31M ($203K)
2025-05-20	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	8.9M	¥64	-	¥33M ($215K)
2025-05-20	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	8.9M	¥64	+7.8%	¥33M ($215K)
2025-04-30	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	11.9M	¥66	-	¥783M ($5.1M)
2025-04-30	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	11.9M	¥66	-	-
2025-04-30	SELL	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	9.5M	¥66	+10.6%	¥133M ($857K)
2025-04-28	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	11.9M	¥69	-	¥819M ($5.3M)
2025-04-28	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	11.9M	¥69	-	¥819M ($5.3M)
2025-04-17	BUY	Market Buy	ロングコリドーアセットマネジメントリミテッド(Long Corridor Asset Management Limited) Long Corridor Asset Management Limited	passive	12.3M	¥61	-3.3%	¥750M ($4.8M)
2024-09-04	SELL	private	エボファンド Evo Fund	activist	2.1M	¥102	+42.2%	¥533K ($3K)
2024-09-04	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥102	-	-
2024-08-26	SELL	private	エボファンド Evo Fund	activist	2.6M	¥108	+45.4%	¥544K ($4K)
2024-08-26	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥108	-	-
2024-08-21	SELL	private	エボファンド Evo Fund	activist	3.1M	¥108	+45.4%	¥475K ($3K)
2024-08-21	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥108	-	-
2024-08-15	SELL	private	エボファンド Evo Fund	activist	3.6M	¥103	+42.7%	¥617K ($4K)
2024-08-15	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥103	-	-
2024-08-02	SELL	private	エボファンド Evo Fund	activist	4.2M	¥101	+41.6%	¥514K ($3K)
2024-08-02	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥101	-	-
2024-07-08	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥147	-	-
2024-07-08	BUY	private	エボファンド Evo Fund	activist	4.8M	¥147	-59.9%	¥328K ($2K)
2024-07-02	SELL	private	エボファンド Evo Fund	activist	4.5M	¥169	+65.1%	¥1M ($8K)
2024-07-02	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥169	-	-
2024-06-10	BUY	negotiated	松村米浩 Matsumura Yonehiro	activist	5.1M	¥157	-	¥130M ($837K)

Showing the 50 most recent of 142 filings.

Frequently asked questions

Who has been buying MedRx Co., Ltd stock?: 6 distinct investors have filed 18 disclosed large-shareholding filings in MedRx Co., Ltd (4586), most recently on 2025-08-21. 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 MedRx Co., Ltd have?: MedRx Co., Ltd has 18 buy-side and 57 sell-side disclosures on record, covering ¥8.0B ($51.9M) in total reported value, spanning 2021-06-09 to 2025-08-21.
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.