Who has been buying Wakamoto Pharmaceutical Co.,Ltd. stock?

5 distinct investors have filed 8 disclosed large-shareholding filings in Wakamoto Pharmaceutical Co.,Ltd. (4512), most recently on 2026-01-09. 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 Wakamoto Pharmaceutical Co.,Ltd. have?

Wakamoto Pharmaceutical Co.,Ltd. has 8 buy-side and 4 sell-side disclosures on record, covering ¥1.5B ($9.9M) in total reported value, spanning 2021-03-22 to 2026-01-09.

Where does StockDrifts get Wakamoto Pharmaceutical Co.,Ltd. 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.

Wakamoto Pharmaceutical Co.,Ltd. 4512

Company

わかもと製薬株式会社Wakamoto Pharmaceutical Co.,Ltd.

Investors

Buys

Total Value

¥1.5B ($9.9M)

Avg Return

+14.65%

Last Filing

2026-01-09

Wakamoto Pharmaceutical Co.,Ltd. (4512) has 8 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.5B ($9.9M) in reported transaction value. The earliest filing StockDrifts holds for Wakamoto Pharmaceutical Co.,Ltd. is dated 2021-03-22; the most recent is 2026-01-09. 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 +14.65%, 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
2026-01-09	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.7M	¥299	+21.1%	¥106M ($685K)
2025-05-29	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.3M	¥293	+23.6%	¥106M ($685K)
2025-04-01	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.0M	¥312	+16.0%	¥118M ($764K)
2025-03-07	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.6M	¥286	+26.6%	¥131M ($842K)
2025-02-27	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.1M	¥282	+28.4%	¥603M ($3.9M)
2025-02-13	BUY	unknown	ロート製薬株式会社 ROHTO PHARMACEUTICAL CO.,LTD.	other	4.0M	¥250	+44.8%	¥993M ($6.4M)
2021-11-08	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	500.6K	¥317	-14.2%	¥13M ($85K)
2021-11-08	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.3K	¥317	-14.2%	¥62M ($399K)
2021-11-08	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.1M	¥317	+14.2%	¥347M ($2.2M)
2021-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	543.0K	¥338	+7.1%	¥7M ($46K)
2021-06-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	193.6K	¥338	-7.1%	¥183M ($1.2M)
2021-06-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.1M	¥338	+7.1%	¥370M ($2.4M)
2021-03-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	521.2K	¥728.073	+50.3%	¥79M ($507K)
2021-03-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	735.0K	¥728.073	-50.3%	¥421M ($2.7M)
2021-03-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.1M	¥728.073	-50.3%	¥796M ($5.1M)

Frequently asked questions

Who has been buying Wakamoto Pharmaceutical Co.,Ltd. stock?: 5 distinct investors have filed 8 disclosed large-shareholding filings in Wakamoto Pharmaceutical Co.,Ltd. (4512), most recently on 2026-01-09. 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 Wakamoto Pharmaceutical Co.,Ltd. have?: Wakamoto Pharmaceutical Co.,Ltd. has 8 buy-side and 4 sell-side disclosures on record, covering ¥1.5B ($9.9M) in total reported value, spanning 2021-03-22 to 2026-01-09.
Where does StockDrifts get Wakamoto Pharmaceutical Co.,Ltd. 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 Wakamoto Pharmaceutical Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.