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.

Where does StockDrifts get MedRx 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.

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. 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 -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
2026-08-13	SELL	Market Buy	グロース・キャピタル株式会社 Growth Capital Inc.	passive	8.8M	¥65	-1.5%	¥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	-1.5%	¥57M ($371K)
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	+1.5%	¥42M ($271K)
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	-3.1%	¥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	-8.2%	¥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	-12.3%	¥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	-18.2%	¥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	-34.0%	¥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	+0.0%	¥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	+19.6%	¥89M ($574K)
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	+23.2%	¥23M ($146K)
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	-23.2%	¥433M ($2.8M)
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	+21.1%	¥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	-21.1%	¥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	-16.2%	¥27M ($176K)
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	+19.4%	¥60M ($385K)
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	-19.4%	¥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	-16.2%	¥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	-32.3%	¥18M ($114K)
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	+41.0%	¥31M ($203K)
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	-41.0%	¥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	+34.4%	¥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	-34.4%	¥33M ($215K)
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	-30.3%	¥133M ($857K)
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	+30.3%	¥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	+30.3%	¥783M ($5.1M)
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	+24.6%	¥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	+24.6%	¥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	+41.0%	¥750M ($4.8M)
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	-15.7%	-
2024-09-04	SELL	private	エボファンド Evo Fund	activist	2.1M	¥102	+15.7%	¥533K ($3K)
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	-20.4%	-
2024-08-26	SELL	private	エボファンド Evo Fund	activist	2.6M	¥108	+20.4%	¥544K ($4K)
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	-20.4%	-
2024-08-21	SELL	private	エボファンド Evo Fund	activist	3.1M	¥108	+20.4%	¥475K ($3K)
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	-16.5%	-
2024-08-15	SELL	private	エボファンド Evo Fund	activist	3.6M	¥103	+16.5%	¥617K ($4K)
2024-08-02	SELL	private	エボファンド Evo Fund	activist	4.2M	¥101	+14.8%	¥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	-14.8%	-
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	-41.5%	-
2024-07-08	BUY	private	エボファンド Evo Fund	activist	4.8M	¥147	-41.5%	¥328K ($2K)
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	-49.1%	-
2024-07-02	SELL	private	エボファンド Evo Fund	activist	4.5M	¥169	+49.1%	¥1M ($8K)
2024-06-10	BUY	Market Buy	松村米浩 Matsumura Yonehiro	activist	5.1M	¥157	-45.2%	¥130M ($837K)
2024-06-10	BUY	negotiated	松村米浩 Matsumura Yonehiro	activist	5.1M	¥157	-45.2%	¥130M ($837K)
2024-05-22	SELL	private	エボファンド Evo Fund	activist	5.4M	¥145	+40.7%	¥675K ($4K)
2024-05-22	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	¥145	-40.7%	-
2024-05-20	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	¥156	-44.9%	-
2024-05-20	SELL	private	エボファンド Evo Fund	activist	5.9M	¥156	+44.9%	¥898K ($6K)
2024-05-17	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	¥145	-40.7%	-

Showing the 50 most recent of 136 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.
Where does StockDrifts get MedRx 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 MedRx Co., Ltd. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.