Who has been buying Osaka Organic Chemical Industry Ltd. stock?

9 distinct investors have filed 12 disclosed large-shareholding filings in Osaka Organic Chemical Industry Ltd. (4187), most recently on 2026-05-11. 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 Osaka Organic Chemical Industry Ltd. have?

Osaka Organic Chemical Industry Ltd. has 12 buy-side and 11 sell-side disclosures on record, covering ¥4.0B ($25.6M) in total reported value, spanning 2021-07-21 to 2026-05-11.

Where does StockDrifts get Osaka Organic Chemical Industry 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.

Osaka Organic Chemical Industry Ltd. 4187

Company

大阪有機化学工業株式会社Osaka Organic Chemical Industry Ltd.

Investors

Buys

Total Value

¥4.0B ($25.6M)

Avg Return

+51.68%

Last Filing

2026-05-11

Osaka Organic Chemical Industry Ltd. (4187) has 12 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥4.0B ($25.6M) in reported transaction value. The earliest filing StockDrifts holds for Osaka Organic Chemical Industry Ltd. is dated 2021-07-21; the most recent is 2026-05-11. 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 +51.68%, 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
2026-05-11	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	450.8K	¥4,940	-20.6%	¥1.3B ($8.6M)
2026-05-11	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	395.2K	¥4,940	-20.6%	¥77M ($500K)
2025-09-19	SELL	unknown	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	722.7K	¥3,115	-34.7%	¥56M ($360K)
2025-09-19	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	409.7K	¥3,115	-34.7%	¥49M ($315K)
2025-03-17	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	395.2K	¥2,637	+59.1%	¥1.0B ($6.7M)
2025-03-17	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	172.0K	¥2,637	+59.1%	¥454M ($2.9M)
2025-03-17	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	559.8K	¥2,637	+59.1%	¥1.5B ($9.5M)
2024-04-04	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	740.2K	¥3,200	+31.1%	¥2.4B ($15.3M)
2024-04-04	BUY	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	425.8K	¥3,200	+31.1%	¥1.4B ($8.8M)
2023-09-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	999.0K	¥2,501	+67.7%	¥157M ($1.0M)
2023-09-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	78.7K	¥2,501	-67.7%	¥482M ($3.1M)
2023-09-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	242	¥2,501	-67.7%	¥196M ($1.3M)
2023-07-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	936.1K	¥2,715	+54.5%	¥43M ($275K)
2023-07-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	270.3K	¥2,715	+54.5%	¥383M ($2.5M)
2023-07-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	79.3K	¥2,715	-54.5%	¥37M ($236K)
2023-07-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	92.8K	¥2,940	+42.7%	¥273M ($1.8M)
2023-07-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	921.2K	¥2,940	+42.7%	¥2.7B ($17.5M)
2023-07-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	130.3K	¥2,940	+42.7%	¥383M ($2.5M)
2023-05-29	SELL	negotiated	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	21.1K	¥2,384	-76.0%	¥406M ($2.6M)
2023-05-29	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	117.8K	¥2,384	+76.0%	¥91M ($586K)
2023-05-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	396.9K	¥2,384	-76.0%	¥198M ($1.3M)
2023-05-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	395.2K	¥2,384	+76.0%	¥942M ($6.1M)
2021-07-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	296.9K	¥3,590	-16.9%	¥925M ($6.0M)
2021-07-21	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	534.5K	¥3,590	-16.9%	¥217M ($1.4M)

Frequently asked questions

Who has been buying Osaka Organic Chemical Industry Ltd. stock?: 9 distinct investors have filed 12 disclosed large-shareholding filings in Osaka Organic Chemical Industry Ltd. (4187), most recently on 2026-05-11. 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 Osaka Organic Chemical Industry Ltd. have?: Osaka Organic Chemical Industry Ltd. has 12 buy-side and 11 sell-side disclosures on record, covering ¥4.0B ($25.6M) in total reported value, spanning 2021-07-21 to 2026-05-11.
Where does StockDrifts get Osaka Organic Chemical Industry 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 Osaka Organic Chemical Industry Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.