Who has been buying OAT Agrio Co., Ltd. stock?

7 distinct investors have filed 20 disclosed large-shareholding filings in OAT Agrio Co., Ltd. (4979), most recently on 2025-09-29. 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 OAT Agrio Co., Ltd. have?

OAT Agrio Co., Ltd. has 20 buy-side and 20 sell-side disclosures on record, covering ¥3.1B ($19.9M) in total reported value, spanning 2021-10-22 to 2025-09-29.

Where does StockDrifts get OAT Agrio 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.

OAT Agrio Co., Ltd. 4979

Company

OATアグリオ株式会社OAT Agrio Co., Ltd.

Investors

Buys

Total Value

¥3.1B ($19.9M)

Avg Return

+52.92%

Last Filing

2025-09-29

OAT Agrio Co., Ltd. (4979) has 20 disclosed large-shareholding filings and 20 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥3.1B ($19.9M) in reported transaction value. The earliest filing StockDrifts holds for OAT Agrio Co., Ltd. is dated 2021-10-22; the most recent is 2025-09-29. 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 +52.92%, 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
2025-09-29	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	42.0K	¥2,498	+2.5%	¥105M ($677K)
2025-09-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	117.9K	¥2,498	+2.5%	¥97M ($625K)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	772.4K	¥2,498	+2.5%	¥1.9B ($12.4M)
2025-07-14	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	42.0K	¥2,202	+16.3%	¥56M ($362K)
2025-07-14	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	78.4K	¥2,202	+16.3%	¥173M ($1.1M)
2025-07-14	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	772.4K	¥2,202	+16.3%	¥17M ($110K)
2025-02-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	204.4K	¥1,958	+30.8%	¥400M ($2.6M)
2025-02-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	288.9K	¥1,958	-30.8%	¥180M ($1.2M)
2025-01-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	204.3K	¥1,930	-32.6%	¥6M ($41K)
2025-01-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	380.9K	¥1,930	-32.6%	¥11M ($69K)
2024-12-20	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	207.7K	¥1,963	+30.4%	¥408M ($2.6M)
2024-12-20	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	386.0K	¥1,963	+30.4%	¥758M ($4.9M)
2024-12-06	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	308.2K	¥1,978	+29.4%	¥37M ($240K)
2024-12-06	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	205.0K	¥1,978	-29.4%	¥309M ($2.0M)
2024-10-31	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	16.3K	¥1,849	+38.5%	¥30M ($194K)
2024-10-31	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	764.9K	¥1,849	+38.5%	¥209M ($1.3M)
2024-10-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	361.2K	¥2,091	-22.4%	¥30M ($194K)
2024-10-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	289.1K	¥2,091	-22.4%	¥2M ($15K)
2024-09-24	SELL	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	375.1K	¥1,948	-31.4%	¥17M ($111K)
2024-09-24	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	289.8K	¥1,948	+31.4%	¥4M ($28K)
2024-07-05	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	384.5K	¥1,692	+51.3%	¥30M ($193K)
2024-07-05	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	288.0K	¥1,692	-51.3%	¥2M ($12K)
2024-07-02	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	16.3K	¥1,697	+50.9%	¥28M ($178K)
2024-07-02	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	652.6K	¥1,697	+50.9%	¥192M ($1.2M)
2024-06-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	366.8K	¥1,506	-70.0%	¥38M ($247K)
2024-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	289.4K	¥1,506	+70.0%	¥436M ($2.8M)
2024-03-25	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	16.3K	¥1,930	+32.6%	¥31M ($203K)
2024-03-25	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	539.0K	¥1,930	+32.6%	¥1.0B ($6.7M)
2024-01-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	391.5K	¥1,911	+34.0%	¥2M ($14K)
2024-01-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	289.5K	¥1,911	-34.0%	¥13M ($82K)
2023-11-22	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	390.4K	¥1,930	+32.6%	¥147M ($951K)
2023-11-22	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	295.4K	¥1,930	+32.6%	¥30M ($193K)
2023-05-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	314.9K	¥1,741	+47.0%	¥25M ($162K)
2023-05-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	280.0K	¥1,741	-47.0%	¥2M ($12K)
2023-04-21	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	280.8K	¥1,328	+92.8%	¥373M ($2.4M)
2023-04-21	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	300.4K	¥1,328	-92.8%	¥10M ($66K)
2022-12-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	307.3K	¥1,513	-69.2%	¥17M ($108K)
2022-12-22	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	281.6K	¥1,513	-69.2%	¥2M ($11K)
2022-11-08	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	319.4K	¥1,685	-51.9%	¥90M ($578K)
2022-11-08	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	281.8K	¥1,685	-51.9%	¥4M ($24K)
2022-09-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	371.5K	¥1,793	-42.8%	¥278M ($1.8M)
2022-09-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	284.9K	¥1,793	+42.8%	¥511M ($3.3M)
2022-03-23	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	527.3K	¥1,143	+124.0%	¥603M ($3.9M)
2022-03-23	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	284.4K	¥1,143	+124.0%	¥325M ($2.1M)
2022-03-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	515.9K	¥1,074	+138.4%	¥38M ($245K)
2022-03-07	SELL	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	400	¥1,074	-138.4%	¥301M ($1.9M)
2022-01-21	BUY	unknown	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	250.5K	¥972	+163.4%	¥241M ($1.6M)
2022-01-21	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	7.1K	¥972	-163.4%	¥81M ($521K)
2021-10-22	SELL	unknown	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	275.7K	¥1,018.5	-151.3%	¥1M ($7K)
2021-10-22	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	90.4K	¥1,018.5	+151.3%	¥92M ($594K)

Frequently asked questions

Who has been buying OAT Agrio Co., Ltd. stock?: 7 distinct investors have filed 20 disclosed large-shareholding filings in OAT Agrio Co., Ltd. (4979), most recently on 2025-09-29. 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 OAT Agrio Co., Ltd. have?: OAT Agrio Co., Ltd. has 20 buy-side and 20 sell-side disclosures on record, covering ¥3.1B ($19.9M) in total reported value, spanning 2021-10-22 to 2025-09-29.
Where does StockDrifts get OAT Agrio 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 OAT Agrio Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.