Who has been buying Nippon Shinyaku Co., Ltd. stock?

16 distinct investors have filed 24 disclosed large-shareholding filings in Nippon Shinyaku Co., Ltd. (4516), most recently on 2025-12-18. 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 Nippon Shinyaku Co., Ltd. have?

Nippon Shinyaku Co., Ltd. has 24 buy-side and 13 sell-side disclosures on record, covering ¥63.8B ($411.6M) in total reported value, spanning 2022-12-19 to 2025-12-18.

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.

Nippon Shinyaku Co., Ltd. 4516

Company

日本新薬株式会社Nippon Shinyaku Co., Ltd.

Investors

Buys

Total Value

¥63.8B ($411.6M)

Avg Return

+2.18%

Last Filing

2025-12-18

Nippon Shinyaku Co., Ltd. (4516) has 24 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥63.8B ($411.6M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Shinyaku Co., Ltd. is dated 2022-12-19; the most recent is 2025-12-18. Across these filings the average return since disclosure is +2.18%, 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	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	203.2K	¥3,539	-0.8%	¥622M ($4.0M)
2026-08-06	SELL	unknown	野村證券株式会社	other	472.5K	¥3,539	+0.8%	¥920M ($5.9M)
2026-08-06	SELL	unknown	野村アセットマネジメント株式会社	other	2.4M	¥3,539	+0.8%	¥6.0B ($38.7M)
2025-12-18	BUY	Market Buy	野村證券株式会社	other	727.8K	¥5,968	-41.2%	¥2.9B ($18.7M)
2025-12-18	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	27.1K	¥5,968	-41.2%	¥126M ($811K)
2025-12-18	BUY	Market Buy	野村アセットマネジメント株式会社	other	4.1M	¥5,968	-41.2%	¥5.0B ($32.2M)
2025-04-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	246.5K	¥3,504	+0.1%	¥864M ($5.6M)
2025-04-04	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	9.2K	¥3,504	+0.1%	¥32M ($208K)
2025-04-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.3M	¥3,504	+0.1%	¥11.5B ($74.2M)
2024-11-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.6M	¥4,018	-12.7%	¥10.5B ($67.7M)
2024-11-20	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	103.4K	¥4,018	-12.7%	¥39.5B ($255.0M)
2024-11-20	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	86.3K	¥4,018	+12.7%	¥1.4B ($9.3M)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	470.0K	¥3,452	+1.6%	¥364M ($2.3M)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.3M	¥3,452	-1.6%	¥73M ($469K)
2024-07-29	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	119.3K	¥3,452	-	¥412M ($2.7M)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	2.7M	¥3,452	-	-
2024-03-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.2K	¥4,512	-22.2%	¥19M ($124K)
2024-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	439.9K	¥4,512	-22.2%	¥2.0B ($12.8M)
2024-03-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.1M	¥4,512	-22.2%	¥14.0B ($90.3M)
2023-09-05	SELL	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	931.8K	¥6,330	+44.6%	¥267M ($1.7M)
2023-09-05	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	185.5K	¥6,330	-44.6%	¥356M ($2.3M)
2023-09-05	SELL	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	51.6K	¥6,330	+44.6%	¥311M ($2.0M)
2023-09-05	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	93.8K	¥6,330	+44.6%	¥445M ($2.9M)
2023-09-05	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	111.3K	¥6,330	-44.6%	¥44M ($287K)
2023-09-05	SELL	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	67.4K	¥6,330	+44.6%	¥1.2B ($7.7M)
2023-09-05	SELL	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	582.0K	¥6,330	+44.6%	¥2.8B ($18.1M)
2023-09-05	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	555.7K	¥6,330	+44.6%	¥2.2B ($14.3M)
2023-09-05	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	87.6K	¥6,330	+44.6%	¥44M ($287K)
2023-08-18	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	975.0K	¥5,819	-39.7%	¥5.7B ($36.6M)
2023-08-18	BUY	Market Buy	ブラックロック・フィナンシャル・マネジメント・インク(BlackRock Financial Management BlackRock Financial Management, Inc.	passive	128.0K	¥5,819	-39.7%	¥745M ($4.8M)
2023-08-18	BUY	Market Buy	ブラックロック・インベストメント・マネジメント (オーストラリア)リミテッドLimited) BlackRock Investment Management (Australia	passive	96.3K	¥5,819	-39.7%	¥560M ($3.6M)
2023-08-18	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	163.6K	¥5,819	-39.7%	¥952M ($6.1M)
2023-08-18	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	106.3K	¥5,819	-39.7%	¥619M ($4.0M)
2023-08-18	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	262.7K	¥5,819	-39.7%	¥1.5B ($9.9M)
2023-08-18	BUY	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	903.6K	¥5,819	-39.7%	¥5.3B ($33.9M)
2023-08-18	BUY	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	92.5K	¥5,819	-39.7%	¥538M ($3.5M)
2023-08-18	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	1.0M	¥5,819	-39.7%	¥6.0B ($38.4M)
2023-03-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	2.7M	¥5,850	-	-
2023-03-20	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.3M	¥5,850	+40.0%	¥493M ($3.2M)
2023-03-20	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	368.6K	¥5,850	+40.0%	¥164M ($1.1M)
2022-12-19	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.4M	¥7,680	+54.3%	¥7.7B ($49.8M)
2022-12-19	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	396.9K	¥7,680	-54.3%	¥432M ($2.8M)
2022-12-19	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	2.7M	¥7,680	+54.3%	¥4.7B ($30.3M)

Frequently asked questions

Who has been buying Nippon Shinyaku Co., Ltd. stock?: 16 distinct investors have filed 24 disclosed large-shareholding filings in Nippon Shinyaku Co., Ltd. (4516), most recently on 2025-12-18. 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 Nippon Shinyaku Co., Ltd. have?: Nippon Shinyaku Co., Ltd. has 24 buy-side and 13 sell-side disclosures on record, covering ¥63.8B ($411.6M) in total reported value, spanning 2022-12-19 to 2025-12-18.
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.