Who has been buying Fuso Pharmaceutical Industries,Ltd. stock?

8 distinct investors have filed 8 disclosed large-shareholding filings in Fuso Pharmaceutical Industries,Ltd. (4538), most recently on 2026-02-06. 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 Fuso Pharmaceutical Industries,Ltd. have?

Fuso Pharmaceutical Industries,Ltd. has 8 buy-side and 13 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2023-09-22 to 2026-02-06.

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.

Fuso Pharmaceutical Industries,Ltd. 4538

Company

扶桑薬品工業株式会社Fuso Pharmaceutical Industries,Ltd.

Investors

Buys

Total Value

¥2.8B ($18.2M)

Avg Return

-4.57%

Last Filing

2026-02-06

Fuso Pharmaceutical Industries,Ltd. (4538) has 8 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥2.8B ($18.2M) in reported transaction value. The earliest filing StockDrifts holds for Fuso Pharmaceutical Industries,Ltd. is dated 2023-09-22; the most recent is 2026-02-06. Across these filings the average return since disclosure is -4.57%, 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
2026-06-05	SELL	unknown	SMBC日興証券株式会社	other	97.0K	¥2,054	-9.5%	¥427M ($2.8M)
2026-06-05	BUY	unknown	株式会社三井住友銀行	other	278.9K	¥2,054	-	-
2026-06-04	BUY	negotiated	三井住友信託銀行株式会社	strategic	245.5K	¥2,017	-	-
2026-06-04	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	128.8K	¥2,017	-11.6%	¥19M ($123K)
2026-06-04	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	115.0K	¥2,017	+11.6%	¥4M ($25K)
2026-02-06	BUY	unknown	ＳＭＢＣ日興証券株式会社 SMBC Nikko Securities Inc.	other	584.0K	¥2,343	-4.0%	¥1.4B ($8.8M)
2026-02-05	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	497.0K	¥2,353	+4.4%	¥31M ($201K)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	245.5K	¥2,151	-	-
2025-09-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	152.4K	¥2,151	-4.6%	¥53M ($341K)
2025-09-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	112.0K	¥2,151	-4.6%	¥2M ($13K)
2025-05-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	278.9K	¥2,231	-	-
2025-05-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	89.2K	¥2,231	-0.8%	¥420M ($2.7M)
2025-04-21	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	113.5K	¥2,304	+2.3%	¥2M ($14K)
2025-04-21	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	245.5K	¥2,304	-	-
2025-04-21	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	176.7K	¥2,304	+2.3%	¥2M ($14K)
2025-03-21	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	245.5K	¥2,597	+13.4%	¥172M ($1.1M)
2025-03-21	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	177.6K	¥2,597	-13.4%	¥54M ($348K)
2025-03-21	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	113.9K	¥2,597	-13.4%	¥64M ($412K)
2025-03-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	276.5K	¥2,563	-12.2%	¥709M ($4.6M)
2025-03-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	278.9K	¥2,563	-12.2%	¥715M ($4.6M)
2024-04-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	278.9K	¥2,208	-	-
2024-04-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	18.8K	¥2,208	-1.9%	¥401M ($2.6M)
2024-03-25	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	278.9K	¥2,319	-3.0%	¥647M ($4.2M)
2024-03-25	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	200.7K	¥2,319	-3.0%	¥465M ($3.0M)
2023-10-02	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	224.5K	¥1,960	-14.8%	¥237M ($1.5M)
2023-10-02	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	38.6K	¥1,960	+14.8%	¥33M ($215K)
2023-10-02	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	93.4K	¥1,960	-14.8%	¥93M ($598K)
2023-09-22	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	311.7K	¥2,020	-11.4%	¥134M ($862K)
2023-09-22	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	157.2K	¥2,020	-11.4%	¥105M ($677K)
2023-09-22	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	89.8K	¥2,020	-11.4%	¥50M ($320K)

Frequently asked questions

Who has been buying Fuso Pharmaceutical Industries,Ltd. stock?: 8 distinct investors have filed 8 disclosed large-shareholding filings in Fuso Pharmaceutical Industries,Ltd. (4538), most recently on 2026-02-06. 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 Fuso Pharmaceutical Industries,Ltd. have?: Fuso Pharmaceutical Industries,Ltd. has 8 buy-side and 13 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2023-09-22 to 2026-02-06.
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.