Who has been buying Zeon Corporation stock?

10 distinct investors have filed 18 disclosed large-shareholding filings in Zeon Corporation (4205), most recently on 2024-12-06. 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 Zeon Corporation have?

Zeon Corporation has 18 buy-side and 14 sell-side disclosures on record, covering ¥60.1B ($387.8M) in total reported value, spanning 2022-12-07 to 2024-12-06.

Where does StockDrifts get Zeon Corporation 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.

Zeon Corporation 4205

Company

日本ゼオン株式会社Zeon Corporation

Investors

Buys

Total Value

¥60.1B ($387.8M)

Avg Return

+29.90%

Last Filing

2024-12-06

Zeon Corporation (4205) has 18 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥60.1B ($387.8M) in reported transaction value. The earliest filing StockDrifts holds for Zeon Corporation is dated 2022-12-07; the most recent is 2024-12-06. 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 +29.90%, 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
2024-12-06	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.8M	¥1,403.5	+27.7%	¥1.2B ($7.5M)
2024-12-06	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.8M	¥1,403.5	+27.7%	¥2.6B ($16.5M)
2024-12-06	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	8.4M	¥1,403.5	+27.7%	¥11.7B ($75.8M)
2024-12-06	SELL	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.6M	¥1,403.5	-27.7%	¥64M ($416K)
2024-09-06	BUY	acquisition	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	14.4M	¥1,209.5	+48.2%	¥17.4B ($112.6M)
2024-07-05	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	9.4M	¥1,386.5	-29.3%	¥5.8B ($37.2M)
2024-05-21	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	10.4M	¥1,458.5	+22.9%	¥15.0B ($96.8M)
2024-05-21	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	100.5K	¥1,458.5	+22.9%	¥11.0B ($71.1M)
2024-05-21	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	382.0K	¥1,458.5	+22.9%	¥33M ($216K)
2024-05-13	SELL	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	10.6M	¥1,490.5	-20.2%	¥3.7B ($24.1M)
2024-05-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.6M	¥1,493	+20.0%	¥1.3B ($8.2M)
2024-05-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	11.3M	¥1,493	+20.0%	¥16.7B ($107.7M)
2024-05-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	374.3K	¥1,493	+20.0%	¥559M ($3.6M)
2024-03-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	4.0M	¥1,257	+42.6%	¥58M ($372K)
2024-03-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.6M	¥1,257	+42.6%	¥4.6B ($29.4M)
2024-03-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	129.3K	¥1,257	+42.6%	¥14.5B ($93.3M)
2024-03-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	8.4M	¥1,257	+42.6%	¥10.5B ($67.9M)
2024-02-26	SELL	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	13.1M	¥1,298	-38.1%	¥4.1B ($26.5M)
2024-02-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.9M	¥1,300	+37.9%	¥1.2B ($7.7M)
2024-02-22	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.6M	¥1,300	-37.9%	¥60M ($385K)
2024-02-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	2.3M	¥1,300	+37.9%	¥3.0B ($19.0M)
2024-02-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	8.4M	¥1,300	+37.9%	¥10.9B ($70.2M)
2024-01-11	SELL	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	13.6M	¥1,316	-36.2%	¥4.4B ($28.6M)
2023-12-27	SELL	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	16.2M	¥1,312	-36.6%	¥3.9B ($25.4M)
2023-11-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	13.5M	¥1,264	+41.8%	¥3.5B ($22.5M)
2023-11-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	779.0K	¥1,264	-41.8%	¥87M ($561K)
2023-10-06	SELL	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	19.2M	¥1,531.5	-17.0%	¥4.4B ($28.6M)
2023-08-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.0M	¥1,519	-18.0%	¥70M ($450K)
2023-08-22	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	3.7M	¥1,519	+18.0%	¥2.3B ($14.6M)
2023-08-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	8.4M	¥1,519	+18.0%	¥12.7B ($82.0M)
2023-08-03	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	10.8M	¥1,499	+19.6%	¥16.2B ($104.3M)
2023-08-03	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	856.9K	¥1,499	+19.6%	¥1.3B ($8.3M)
2023-07-21	BUY	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	22.2M	¥1,322	+35.5%	¥29.3B ($189.0M)
2023-07-07	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	8.4M	¥1,366	-31.2%	¥1.3B ($8.1M)
2023-07-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	3.1M	¥1,366	-31.2%	¥2.7B ($17.4M)
2023-07-07	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	strategic	2.2M	¥1,366	+31.2%	¥94M ($607K)
2023-06-22	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	16.9M	¥1,366	+31.2%	¥3.6B ($23.3M)
2023-04-07	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company	passive	14.3M	¥1,377	+30.1%	¥19.7B ($127.1M)
2023-01-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	10.1M	¥1,286	+39.4%	¥12.8B ($82.6M)
2023-01-19	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.3M	¥1,286	-39.4%	¥1.2B ($8.0M)
2023-01-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-2.6K	¥1,286	+39.4%	-
2022-12-07	SELL	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	22.2M	¥1,312	-36.6%	¥3.4B ($21.8M)
2022-12-07	BUY	negotiated	横浜ゴム株式会社 The Yokohama Rubber Company, Limited	strategic	22.2M	¥1,312	+36.6%	¥3.4B ($21.8M)

Frequently asked questions

Who has been buying Zeon Corporation stock?: 10 distinct investors have filed 18 disclosed large-shareholding filings in Zeon Corporation (4205), most recently on 2024-12-06. 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 Zeon Corporation have?: Zeon Corporation has 18 buy-side and 14 sell-side disclosures on record, covering ¥60.1B ($387.8M) in total reported value, spanning 2022-12-07 to 2024-12-06.
Where does StockDrifts get Zeon Corporation 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 Zeon Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.