Who has been buying Hisamitsu Pharmaceutical Co., Inc. stock?

16 distinct investors have filed 23 disclosed large-shareholding filings in Hisamitsu Pharmaceutical Co., Inc. (4530), most recently on 2026-05-12. 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 Hisamitsu Pharmaceutical Co., Inc. have?

Hisamitsu Pharmaceutical Co., Inc. has 23 buy-side and 17 sell-side disclosures on record, covering ¥452.4B ($2.9B) in total reported value, spanning 2022-02-03 to 2026-05-12.

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.

Hisamitsu Pharmaceutical Co., Inc. 4530

Company

久光製薬株式会社Hisamitsu Pharmaceutical Co., Inc.

Investors

Buys

Total Value

¥452.4B ($2.9B)

Avg Return

+16.57%

Last Filing

2026-05-12

Hisamitsu Pharmaceutical Co., Inc. (4530) has 23 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥452.4B ($2.9B) in reported transaction value. The earliest filing StockDrifts holds for Hisamitsu Pharmaceutical Co., Inc. is dated 2022-02-03; the most recent is 2026-05-12. Across these filings the average return since disclosure is +16.57%, 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
2026-05-12	BUY	Market Buy	クレディアンドスリエルエコメルシアル(CREDIT INDUSTRIEL ET COMMERCIAL) CREDIT INDUSTRIEL ET COMMERCIAL	passive	7.1M	¥6,040	+0.0%	¥7.8B ($50.4M)
2026-04-30	SELL	subscription	タイヨー興産株式会社	activist	24.2M	¥6,040	+0.0%	¥117.3B ($756.9M)
2026-04-30	BUY	Market Buy	中冨一榮	activist	23.5M	¥6,040	+0.0%	¥140.1B ($903.6M)
2026-04-30	SELL	unknown	株式会社STM	other	18	¥6,040	+0.0%	¥2.6B ($16.7M)
2026-04-30	SELL	unknown	中冨興産株式会社	other	18	¥6,040	+0.0%	¥772M ($5.0M)
2026-04-30	SELL	unknown	株式会社ティ・ケー・ワイ	other	32	¥6,040	+0.0%	¥11.2B ($72.1M)
2026-04-30	SELL	unknown	有限会社ティ・エム	other	31	¥6,040	+0.0%	¥1.7B ($11.1M)
2026-04-30	SELL	unknown	中冨アセットマネジメント株式会社	other	18	¥6,040	+0.0%	¥3.5B ($22.8M)
2026-04-30	BUY	Market Buy	クレディアンドスリエルエコメルシアル(CREDIT INDUSTRIEL ET COMMERCIAL) CREDIT INDUSTRIEL ET COMMERCIAL	passive	5.8M	¥6,040	+0.0%	¥9.6B ($61.8M)
2026-04-30	SELL	unknown	株式会社SSTM	other	0	¥6,040	+0.0%	¥3.1B ($19.9M)
2026-04-06	BUY	acquisition	クレディアンドスリエルエコメルシアル(CREDIT INDUSTRIEL ET COMMERCIAL) CREDIT INDUSTRIEL ET COMMERCIAL	passive	4.2M	¥6,038	+0.0%	¥25.4B ($164.1M)
2026-03-02	SELL	unknown	株式会社三菱UFJ銀行	unknown	0	¥6,035	-0.1%	¥18.4B ($118.5M)
2026-03-02	SELL	unknown	三菱UFJ信託銀行株式会社	passive	511.3K	¥6,035	-0.1%	¥2.6B ($17.0M)
2026-03-02	BUY	unknown	三菱UFJアセットマネジメント株式会社	passive	300.0K	¥6,035	+0.1%	¥318M ($2.0M)
2026-02-27	BUY	subscription	タイヨー興産株式会社	activist	43.6M	¥6,030	+0.2%	¥252.0B ($1.6B)
2026-02-27	BUY	subscription	中冨一榮	activist	313.5K	¥6,030	-	-
2026-02-27	BUY	subscription	株式会社SSTM	other	513.0K	¥6,030	-	-
2026-02-27	BUY	subscription	株式会社STM	other	429.6K	¥6,030	-	-
2026-02-27	SELL	subscription	中冨興産株式会社	other	126.4K	¥6,030	-0.2%	¥1.5B ($9.4M)
2026-02-27	BUY	subscription	株式会社ティ・ケー・ワイ	other	1.8M	¥6,030	-	-
2026-02-27	BUY	subscription	有限会社ティ・エム	other	285.5K	¥6,030	-	-
2026-02-27	BUY	subscription	中冨アセットマネジメント株式会社	other	586.6K	¥6,030	-	-
2026-02-27	BUY	subscription	タイヨー興産株式会社	activist	43.6M	¥6,030	-	-
2026-02-27	BUY	subscription	中冨一榮	activist	313.5K	¥6,030	-	-
2026-02-27	BUY	subscription	株式会社SSTM	other	513.0K	¥6,030	-	-
2026-02-27	BUY	subscription	株式会社STM	other	429.6K	¥6,030	-	-
2026-02-27	BUY	subscription	中冨興産株式会社	other	126.4K	¥6,030	-	-
2026-02-27	BUY	subscription	株式会社ティ・ケー・ワイ	other	1.8M	¥6,030	-	-
2026-02-27	BUY	subscription	有限会社ティ・エム	other	285.5K	¥6,030	-	-
2026-02-27	BUY	subscription	中冨アセットマネジメント株式会社	other	586.6K	¥6,030	-	-
2026-01-14	BUY	subscription	タイヨー興産株式会社	activist	1.8M	¥6,454	-6.4%	¥11.4B ($73.8M)
2026-01-14	BUY	subscription	中冨一榮	activist	313.5K	¥6,454	-6.4%	¥2.0B ($13.1M)
2026-01-14	BUY	subscription	株式会社SSTM	other	513.0K	¥6,454	-6.4%	¥3.3B ($21.4M)
2026-01-14	BUY	subscription	株式会社STM	other	429.6K	¥6,454	-6.4%	¥2.8B ($17.9M)
2026-01-14	BUY	subscription	中冨興産株式会社	other	370.6K	¥6,454	-6.4%	¥2.4B ($15.4M)
2026-01-14	BUY	subscription	株式会社ティ・ケー・ワイ	other	1.8M	¥6,454	-6.4%	¥11.9B ($76.9M)
2026-01-14	BUY	subscription	有限会社ティ・エム	other	285.5K	¥6,454	-6.4%	¥1.8B ($11.9M)
2026-01-14	BUY	subscription	中冨アセットマネジメント株式会社	other	586.6K	¥6,454	-6.4%	¥3.8B ($24.4M)
2024-07-29	BUY	unknown	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	other	3.5M	¥4,120	-	-
2024-07-29	BUY	unknown	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.1M	¥4,120	+46.6%	¥105M ($679K)
2024-07-29	BUY	unknown	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	276.9K	¥4,120	-	-
2024-06-03	BUY	unknown	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	other	3.5M	¥3,766	+60.4%	¥12.8B ($82.6M)
2024-06-03	SELL	unknown	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.0M	¥3,766	-60.4%	¥4.5B ($28.8M)
2024-06-03	BUY	unknown	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	279.6K	¥3,766	-	-
2024-06-03	SELL	unknown	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	49.5K	¥3,766	-60.4%	¥192M ($1.2M)
2024-05-08	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	3.2M	¥3,778	+59.9%	¥12.0B ($77.2M)
2024-05-08	BUY	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	103.6K	¥3,778	+59.9%	¥64M ($415K)
2024-01-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.2M	¥4,217	-43.2%	¥3.4B ($21.8M)
2024-01-29	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	5.0M	¥4,217	-43.2%	¥826M ($5.3M)
2024-01-29	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	278.3K	¥4,217	+43.2%	¥359M ($2.3M)

Showing the 50 most recent of 59 filings.

Frequently asked questions

Who has been buying Hisamitsu Pharmaceutical Co., Inc. stock?: 16 distinct investors have filed 23 disclosed large-shareholding filings in Hisamitsu Pharmaceutical Co., Inc. (4530), most recently on 2026-05-12. 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 Hisamitsu Pharmaceutical Co., Inc. have?: Hisamitsu Pharmaceutical Co., Inc. has 23 buy-side and 17 sell-side disclosures on record, covering ¥452.4B ($2.9B) in total reported value, spanning 2022-02-03 to 2026-05-12.
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.