Who has been buying Fuji Pharma Co., Ltd. stock?

6 distinct investors have filed 6 disclosed large-shareholding filings in Fuji Pharma Co., Ltd. (4554), most recently on 2026-03-19. 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 Fuji Pharma Co., Ltd. have?

Fuji Pharma Co., Ltd. has 6 buy-side and 12 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2023-02-13 to 2026-03-19.

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.

Fuji Pharma Co., Ltd. 4554

Company

富士製薬工業株式会社Fuji Pharma Co., Ltd.

Investors

Buys

Total Value

¥2.8B ($18.2M)

Avg Return

+93.34%

Last Filing

2026-03-19

Fuji Pharma Co., Ltd. (4554) has 6 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥2.8B ($18.2M) in reported transaction value. The earliest filing StockDrifts holds for Fuji Pharma Co., Ltd. is dated 2023-02-13; the most recent is 2026-03-19. Across these filings the average return since disclosure is +93.34%, 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
2026-07-31	SELL	unknown	今井博文	other	2.7M	¥1,861	+1.6%	¥835M ($5.4M)
2026-07-31	BUY	unknown	有限会社FJP	strategic	4.3M	¥1,861	-	-
2026-07-31	BUY	unknown	株式会社Yamhill Sciences	strategic	1.0M	¥1,861	-	-
2026-06-23	SELL	unknown	今井博文	other	3.1M	¥2,288	+20.0%	¥650M ($4.2M)
2026-06-23	BUY	unknown	有限会社FJP	strategic	4.3M	¥2,288	-	-
2026-06-23	BUY	unknown	株式会社Yamhill Sciences	strategic	1.0M	¥2,288	-	-
2026-06-23	BUY	unknown	有限会社FJP	strategic	4.3M	¥2,288	-	-
2026-06-23	BUY	unknown	株式会社Yamhill Sciences	strategic	1.0M	¥2,288	-	-
2026-06-23	SELL	unknown	今井博文	other	3.1M	¥2,288	+20.0%	¥650M ($4.2M)
2026-05-29	BUY	Market Buy	今井博文	other	3.4M	¥2,339	-21.7%	¥261M ($1.7M)
2026-05-29	SELL	unknown	有限会社FJP	strategic	4.3M	¥2,339	+21.7%	¥726M ($4.7M)
2026-05-29	SELL	unknown	株式会社Yamhill Sciences	strategic	1.0M	¥2,339	+21.7%	¥168M ($1.1M)
2026-03-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-22.0K	¥2,237	-7.6%	¥53M ($341K)
2026-03-19	SELL	unknown	野村證券株式会社	other	755.0K	¥2,237	+18.1%	¥986M ($6.4M)
2026-03-19	BUY	unknown	野村アセットマネジメント株式会社	other	462.1K	¥2,237	-18.1%	¥139M ($898K)
2026-03-05	SELL	unknown	野村證券株式会社	other	1.2M	¥2,364	+22.6%	¥1.6B ($10.1M)
2026-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	15.7K	¥2,364	-	¥37M ($240K)
2026-03-05	SELL	unknown	野村アセットマネジメント株式会社	other	400.0K	¥2,364	+22.6%	¥35M ($228K)
2026-02-20	SELL	unknown	野村證券株式会社	other	2.0M	¥2,400	+23.7%	¥400M ($2.6M)
2026-02-20	SELL	unknown	野村アセットマネジメント株式会社	other	416.8K	¥2,400	+23.7%	¥119M ($771K)
2026-02-12	SELL	unknown	野村證券株式会社	other	2.2M	¥2,262	+19.1%	¥479M ($3.1M)
2026-02-12	SELL	unknown	野村アセットマネジメント株式会社	other	465.6K	¥2,262	+19.1%	¥113M ($726K)
2025-08-08	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.4M	¥1,397	-31.1%	¥2.7B ($17.1M)
2025-08-08	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	22.6K	¥1,397	-	-
2025-08-08	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	514.8K	¥1,397	-31.1%	¥49M ($314K)
2024-08-13	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	23.1K	¥1,222	+49.8%	¥28M ($182K)
2024-08-13	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.9M	¥1,222	+49.8%	¥6.0B ($38.6M)
2024-08-13	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	548.0K	¥1,222	+49.8%	¥670M ($4.3M)
2024-04-25	BUY	negotiated	今井博文 Hirofumi Imai	activist	3.1M	¥1,543	-	-
2024-04-25	SELL	negotiated	有限会社FJP FJP Ltd.	activist	4.3M	¥1,543	-18.7%	¥38M ($246K)
2024-04-25	BUY	negotiated	株式会社Yamhill Sciences Yamhill Sciences Co., Ltd.	activist	1.0M	¥1,543	-	-
2023-02-13	SELL	negotiated	今井博文 Hirofumi Imai	activist	3.1M	¥1,043	-75.5%	¥165M ($1.1M)
2023-02-13	BUY	negotiated	有限会社FJP FJP Ltd.	activist	4.3M	¥1,043	+75.5%	¥940M ($6.1M)
2023-02-13	BUY	negotiated	株式会社Yamhill Sciences Yamhill Sciences Co., Ltd.	activist	1.0M	¥1,043	+75.5%	¥1.0B ($6.7M)

Frequently asked questions

Who has been buying Fuji Pharma Co., Ltd. stock?: 6 distinct investors have filed 6 disclosed large-shareholding filings in Fuji Pharma Co., Ltd. (4554), most recently on 2026-03-19. 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 Fuji Pharma Co., Ltd. have?: Fuji Pharma Co., Ltd. has 6 buy-side and 12 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2023-02-13 to 2026-03-19.
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.