Who has been buying COSMOS Pharmaceutical Corporation stock?

19 distinct investors have filed 46 disclosed large-shareholding filings in COSMOS Pharmaceutical Corporation (3349), most recently on 2026-05-13. 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 COSMOS Pharmaceutical Corporation have?

COSMOS Pharmaceutical Corporation has 46 buy-side and 37 sell-side disclosures on record, covering ¥176.6B ($1.1B) in total reported value, spanning 2021-07-26 to 2026-05-13.

Where does StockDrifts get COSMOS Pharmaceutical 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.

COSMOS Pharmaceutical Corporation 3349

Company

株式会社コスモス薬品COSMOS Pharmaceutical Corporation

Investors

Buys

Total Value

¥176.6B ($1.1B)

Avg Return

-16.89%

Last Filing

2026-05-13

COSMOS Pharmaceutical Corporation (3349) has 46 disclosed large-shareholding filings and 37 disclosed disposals on record, filed by 19 distinct investors. Together those filings cover ¥176.6B ($1.1B) in reported transaction value. The earliest filing StockDrifts holds for COSMOS Pharmaceutical Corporation is dated 2021-07-26; the most recent is 2026-05-13. 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 -16.89%, 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
2026-05-13	BUY	unknown	宇野之崇	strategic	2.5M	¥6,208	-6.5%	¥15.8B ($101.6M)
2026-05-13	BUY	unknown	有限会社萬緑	strategic	30.6M	¥6,208	-6.5%	¥190.2B ($1.2B)
2026-04-21	BUY	Market Buy	野村アセットマネジメント株式会社	other	5.5M	¥6,342	-1.9%	¥5.7B ($36.7M)
2026-04-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	14.1K	¥6,342	+1.9%	¥863M ($5.6M)
2026-02-19	SELL	Market Buy	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	2.1M	¥7,200	+12.1%	¥13.1B ($84.3M)
2026-02-19	BUY	Market Buy	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	4.1M	¥7,200	-12.1%	¥25.7B ($165.6M)
2025-12-22	BUY	unknown	野村アセットマネジメント株式会社	other	4.6M	¥7,968	-20.6%	¥29.1B ($188.0M)
2025-12-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	155.8K	¥7,968	-20.6%	¥986M ($6.4M)
2025-12-03	SELL	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	634.7K	¥7,507	+15.7%	¥4.0B ($25.9M)
2025-12-03	BUY	Market Buy	JPモルガン証券株式会社	other	74.6K	¥7,507	+15.7%	¥472M ($3.0M)
2025-12-03	SELL	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	20.7K	¥7,507	+15.7%	¥131M ($845K)
2025-12-03	BUY	Market Buy	ジェー・ピー・モルガン・インベストメント・マネージメント・インク J.P. Morgan Investment Management Inc.	passive	538.6K	¥7,507	-15.7%	¥3.4B ($22.0M)
2025-12-03	BUY	Market Buy	ジェー・ピー・モルガン・アセット・マネジメント(ユーケー)リミテッドLimited) JPMorgan Asset Management(UK	passive	280.7K	¥7,507	-15.7%	¥1.8B ($11.5M)
2025-12-03	SELL	Market Buy	JPモルガン・アセット・マネジメント株式会社	passive	1.4M	¥7,507	+15.7%	¥9.0B ($58.1M)
2025-11-05	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	858.9K	¥6,957	-9.0%	¥4.6B ($29.8M)
2025-11-05	SELL	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	168.4K	¥6,957	+9.0%	¥6.1B ($39.1M)
2025-11-05	BUY	Market Buy	ジェー・ピー・モルガン・インベストメント・マネージメント・インク J.P. Morgan Investment Management Inc.	passive	424.6K	¥6,957	-9.0%	¥1.9B ($12.6M)
2025-11-05	BUY	Market Buy	ジェー・ピー・モルガン・アセット・マネジメント(ユーケー)リミテッドLimited) JPMorgan Asset Management(UK	passive	227.5K	¥6,957	-9.0%	¥1.6B ($10.2M)
2025-11-05	SELL	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	2.5M	¥6,957	+9.0%	¥1.9B ($12.2M)
2025-09-19	SELL	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	2.3M	¥8,689	+27.1%	¥7.4B ($48.0M)
2025-09-19	BUY	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	3.0M	¥8,689	-27.1%	¥209M ($1.3M)
2025-07-24	BUY	unknown	有限会社萬緑 BANRYOKU Co., Ltd.	activist	30.6M	¥9,222	-31.4%	¥282.5B ($1.8B)
2025-06-18	BUY	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	2.7M	¥8,932	-29.1%	¥24.5B ($157.7M)
2025-06-18	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	188.4K	¥8,932	-29.1%	¥1.7B ($10.9M)
2025-06-18	BUY	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	1.0M	¥8,932	-29.1%	¥9.3B ($59.8M)
2025-06-18	BUY	Market Buy	ジェー・ピー・モルガン・インベストメント・マネージメント・インク J.P. Morgan Investment Management Inc.	passive	142.8K	¥8,932	-29.1%	¥1.3B ($8.2M)
2025-06-04	SELL	Market Buy	ジェー・ピー・モルガン・プライム・インク J.P. Morgan Prime Inc.	other	0	¥8,758	+27.7%	¥771M ($5.0M)
2025-06-04	SELL	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	110.9K	¥8,758	+27.7%	¥2.1B ($13.6M)
2025-06-04	SELL	Market Buy	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	-18.3K	¥8,758	+27.7%	¥981M ($6.3M)
2025-06-04	SELL	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	1.0M	¥8,758	+27.7%	¥140M ($904K)
2025-06-04	SELL	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	2.7M	¥8,758	+27.7%	¥771M ($5.0M)
2025-05-08	BUY	Market Buy	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	3.2M	¥9,366	-32.4%	¥3.4B ($22.2M)
2025-05-08	BUY	Market Buy	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	3.0M	¥9,366	-32.4%	¥6.1B ($39.6M)
2025-05-02	BUY	Market Buy	ジェー・ピー・モルガン・プライム・インク J.P. Morgan Prime Inc.	other	89.6K	¥9,233	-31.4%	¥295M ($1.9M)
2025-05-02	SELL	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	70.2K	¥9,233	+31.4%	¥74M ($477K)
2025-05-02	SELL	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	351.6K	¥9,233	+31.4%	¥2.7B ($17.2M)
2025-05-02	BUY	Market Buy	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	92.6K	¥9,233	-31.4%	¥855M ($5.5M)
2025-05-02	SELL	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	1.1M	¥9,233	+31.4%	¥960M ($6.2M)
2025-05-02	BUY	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	2.8M	¥9,233	-31.4%	¥26.0B ($167.9M)
2025-04-21	BUY	unknown	ベイリー・ギフォード・オーバーシーズ・リミテッド Baillie Gifford Overseas Limited	other	2.8M	¥9,037	-29.9%	¥25.6B ($165.2M)
2025-04-21	BUY	unknown	ベイリー・ギフォード・アンド・カンパニー Baillie Gifford & Co	other	2.3M	¥9,037	-29.9%	¥20.8B ($134.3M)
2025-04-18	BUY	Market Buy	ジェー・ピー・モルガン・プライム・インク J.P. Morgan Prime Inc.	other	53.9K	¥8,725	-27.4%	¥470M ($3.0M)
2025-04-18	SELL	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	1.2M	¥8,725	+27.4%	¥838M ($5.4M)
2025-04-18	SELL	Market Buy	JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited	passive	2.8M	¥8,725	+27.4%	¥489M ($3.2M)
2025-04-18	SELL	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	78.8K	¥8,725	+27.4%	¥13.3B ($85.6M)
2025-04-18	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	639.7K	¥8,725	-27.4%	¥2.1B ($13.5M)
2025-03-05	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	18.2K	¥7,103	-10.9%	¥129M ($833K)
2025-03-05	BUY	Market Buy	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	396.2K	¥7,103	-10.9%	¥2.8B ($18.2M)
2025-03-05	BUY	Market Buy	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	24.3K	¥7,103	-10.9%	¥15.9B ($102.7M)
2025-03-05	BUY	Market Buy	JPモルガン・アセット・マネジメント(アジア・パシフィック)リミテッドLimited) JPMorgan Asset Management (Asia Pacific	other	1.3M	¥7,103	-10.9%	¥170M ($1.1M)

Showing the 50 most recent of 101 filings.

Frequently asked questions

Who has been buying COSMOS Pharmaceutical Corporation stock?: 19 distinct investors have filed 46 disclosed large-shareholding filings in COSMOS Pharmaceutical Corporation (3349), most recently on 2026-05-13. 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 COSMOS Pharmaceutical Corporation have?: COSMOS Pharmaceutical Corporation has 46 buy-side and 37 sell-side disclosures on record, covering ¥176.6B ($1.1B) in total reported value, spanning 2021-07-26 to 2026-05-13.
Where does StockDrifts get COSMOS Pharmaceutical 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 COSMOS Pharmaceutical Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.