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

9 distinct investors have filed 15 disclosed large-shareholding filings in Daito Pharmaceutical Co.,Ltd. (4577), most recently on 2026-02-04. 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 Daito Pharmaceutical Co.,Ltd. have?

Daito Pharmaceutical Co.,Ltd. has 15 buy-side and 15 sell-side disclosures on record, covering ¥2.9B ($18.8M) in total reported value, spanning 2021-04-22 to 2026-02-04.

Where does StockDrifts get Daito 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.

Daito Pharmaceutical Co.,Ltd. 4577

Company

ダイト株式会社Daito Pharmaceutical Co.,Ltd.

Investors

Buys

Total Value

¥2.9B ($18.8M)

Avg Return

+2.26%

Last Filing

2026-02-04

Daito Pharmaceutical Co.,Ltd. (4577) has 15 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥2.9B ($18.8M) in reported transaction value. The earliest filing StockDrifts holds for Daito Pharmaceutical Co.,Ltd. is dated 2021-04-22; the most recent is 2026-02-04. 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 +2.26%, 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
2026-02-04	SELL	Market Buy	マサチューセッツ・ファイナンシャル・サービセズ・カンパニー(Massachusetts Financial Services Company) Massachusetts Financial Services Company	passive	1.2M	¥1,354	+0.3%	¥465M ($3.0M)
2025-08-12	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	3.4M	¥1,243	+8.6%	¥430M ($2.8M)
2025-08-12	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	3.4M	¥1,243	+8.6%	¥430M ($2.8M)
2025-06-06	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.5M	¥1,020	+32.4%	¥1.6B ($10.1M)
2024-08-22	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.5M	¥1,199.5	+12.6%	¥188M ($1.2M)
2024-06-26	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.4M	¥1,137.5	+18.7%	¥200M ($1.3M)
2024-05-07	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.2M	¥1,271	+6.2%	¥223M ($1.4M)
2024-03-25	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.1M	¥1,158	+16.6%	¥211M ($1.4M)
2024-03-25	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	1.1M	¥1,158	+16.6%	¥200M ($1.3M)
2024-01-31	BUY	Market Buy	カナメ・キャピタル・エルピー(Kaname Capital,L.P.) Kaname Capital, L.P.	passive	893.1K	¥987.5	+36.7%	¥882M ($5.7M)
2024-01-11	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	672.7K	¥972	-38.9%	¥160M ($1.0M)
2023-12-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	838.1K	¥958.5	-40.9%	¥486M ($3.1M)
2023-11-08	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.3M	¥965.5	-39.8%	¥228M ($1.5M)
2023-07-12	SELL	unknown	ハイクレア・インターナショナル・インベスターズ・エルエルピー(Highclere International Investors LLP) Highclere International Investors LLP	other	571.7K	¥970	-39.2%	¥147M ($947K)
2023-06-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	195.2K	¥1,066.82	-26.5%	¥9M ($60K)
2023-06-06	SELL	unknown	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	464.4K	¥1,066.82	-26.5%	¥152M ($982K)
2022-08-04	SELL	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	700	¥1,163.18	-16.1%	¥7M ($47K)
2022-08-04	BUY	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	224.0K	¥1,163.18	+16.1%	¥261M ($1.7M)
2022-07-06	SELL	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	646.9K	¥1,263.64	-6.8%	¥205M ($1.3M)
2022-07-06	BUY	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	222.3K	¥1,263.64	+6.8%	¥281M ($1.8M)
2022-05-10	SELL	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	816.6K	¥1,211.36	-11.4%	¥177M ($1.1M)
2022-05-10	SELL	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	220.1K	¥1,211.36	-11.4%	¥2M ($11K)
2022-03-23	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.4M	¥1,298.64	+4.0%	¥223M ($1.4M)
2022-03-22	BUY	Market Buy	マサチューセッツ・ファイナンシャル・サービセズ・カンパニー(Massachusetts Financial Services Company) Massachusetts Financial Services Company	passive	709.6K	¥1,264.54	+6.8%	¥897M ($5.8M)
2022-03-04	SELL	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	218.5K	¥1,354.54	+0.3%	¥4M ($25K)
2022-03-04	SELL	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	971.7K	¥1,354.54	+0.3%	¥225M ($1.4M)
2021-12-20	BUY	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	217.9K	¥1,330.45	+1.5%	¥290M ($1.9M)
2021-12-20	SELL	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	1.1M	¥1,330.45	-1.5%	¥186M ($1.2M)
2021-12-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.2M	¥1,363.18	-1.0%	¥298M ($1.9M)
2021-10-21	SELL	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	540.3K	¥1,479.54	+8.8%	¥219M ($1.4M)
2021-10-05	BUY	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	217.2K	¥1,431.82	-5.7%	¥311M ($2.0M)
2021-10-05	BUY	unknown	大和証券株式会社 Daiwa Securities Co.Ltd.	other	1.3M	¥1,431.82	-5.7%	¥1.9B ($12.0M)
2021-09-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	983.0K	¥1,695.45	-20.4%	¥237M ($1.5M)
2021-08-03	BUY	unknown	ハイクレア・インターナショナル・インベスターズ・エルエルピー(Highclere International Investors LLP) Highclere International Investors LLP	other	689.3K	¥1,525	-11.5%	¥1.1B ($6.8M)
2021-08-03	BUY	unknown	ハイクレア・インターナショナル・インベスターズ・エルエルピー(Highclere International Investors LLP) Highclere International Investors LLP	other	689.3K	¥1,525	-11.5%	¥1.1B ($6.8M)
2021-07-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	843.6K	¥1,577.27	-14.4%	¥236M ($1.5M)
2021-04-22	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	694.7K	¥1,636.36	-17.5%	¥1.1B ($7.3M)

Frequently asked questions

Who has been buying Daito Pharmaceutical Co.,Ltd. stock?: 9 distinct investors have filed 15 disclosed large-shareholding filings in Daito Pharmaceutical Co.,Ltd. (4577), most recently on 2026-02-04. 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 Daito Pharmaceutical Co.,Ltd. have?: Daito Pharmaceutical Co.,Ltd. has 15 buy-side and 15 sell-side disclosures on record, covering ¥2.9B ($18.8M) in total reported value, spanning 2021-04-22 to 2026-02-04.
Where does StockDrifts get Daito 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 Daito Pharmaceutical Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.