Who has been buying Gun Ei Chemical Industry Co., Ltd. stock?

6 distinct investors have filed 7 disclosed large-shareholding filings in Gun Ei Chemical Industry Co., Ltd. (4229), most recently on 2026-04-03. 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 Gun Ei Chemical Industry Co., Ltd. have?

Gun Ei Chemical Industry Co., Ltd. has 7 buy-side and 1 sell-side disclosures on record, covering ¥1.1B ($7.4M) in total reported value, spanning 2024-01-12 to 2026-04-03.

Where does StockDrifts get Gun Ei Chemical Industry 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.

Gun Ei Chemical Industry Co., Ltd. 4229

Company

群栄化学工業株式会社Gun Ei Chemical Industry Co., Ltd.

Investors

Buys

Total Value

¥1.1B ($7.4M)

Avg Return

+3.10%

Last Filing

2026-04-03

Gun Ei Chemical Industry Co., Ltd. (4229) has 7 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.1B ($7.4M) in reported transaction value. The earliest filing StockDrifts holds for Gun Ei Chemical Industry Co., Ltd. is dated 2024-01-12; the most recent is 2026-04-03. 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 +3.10%, 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
2026-06-16	BUY	unknown	株式会社UESHIMA	activist	11.4K	¥4,880	-7.4%	¥56M ($359K)
2026-06-16	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	35.8K	¥4,880	-7.4%	¥175M ($1.1M)
2026-06-16	BUY	unknown	株式会社ナチュラリ	activist	294.4K	¥4,880	-7.4%	¥1.4B ($9.3M)
2026-06-16	BUY	unknown	植島幹九郎	activist	237.8K	¥4,880	-7.4%	¥1.2B ($7.5M)
2026-06-16	BUY	Market Buy	株式会社DOE5パーセント	activist	67.1K	¥4,880	-7.4%	¥40M ($255K)
2026-05-26	BUY	unknown	株式会社UESHIMA	activist	11.4K	¥4,310	+10.6%	¥49M ($317K)
2026-05-26	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	35.8K	¥4,310	+10.6%	¥154M ($995K)
2026-05-26	BUY	Market Buy	株式会社ナチュラリ	activist	294.4K	¥4,310	+10.6%	¥337M ($2.2M)
2026-05-26	SELL	unknown	植島幹九郎	activist	237.8K	¥4,310	-10.6%	¥209M ($1.4M)
2026-05-26	BUY	Market Buy	株式会社DOE5パーセント	activist	59.1K	¥4,310	+10.6%	¥237M ($1.5M)
2026-04-03	BUY	Market Buy	株式会社UESHIMA	activist	11.4K	¥5,350	-2.4%	¥61M ($393K)
2026-04-03	BUY	Market Buy	株式会社ドリームキャリアホールディングス	activist	35.8K	¥5,350	-2.4%	¥192M ($1.2M)
2026-04-03	BUY	Market Buy	株式会社ナチュラリ	activist	216.1K	¥5,350	-2.4%	¥404M ($2.6M)
2026-04-03	BUY	Market Buy	株式会社DOE5パーセント	activist	4.8K	¥5,350	-2.4%	¥26M ($166K)
2026-04-03	BUY	Market Buy	植島幹九郎	activist	285.8K	¥5,350	-2.4%	¥82M ($528K)
2026-03-19	BUY	unknown	株式会社UESHIMA	activist	11.4K	¥4,985	+5.3%	¥60M ($386K)
2026-03-19	BUY	unknown	株式会社ドリームキャリアホールディングス	activist	35.8K	¥4,985	+5.3%	¥188M ($1.2M)
2026-03-19	BUY	unknown	株式会社ナチュラリ	activist	140.6K	¥4,985	+5.3%	¥738M ($4.8M)
2026-03-19	BUY	unknown	植島幹九郎	activist	270.7K	¥4,985	+5.3%	¥1.4B ($9.2M)
2026-03-19	BUY	unknown	株式会社DOE5パーセント	activist	4.8K	¥4,985	+5.3%	¥25M ($163K)
2024-01-12	SELL	negotiated	三井化学株式会社 Mitsui Chemicals, Inc.	strategic	578.5K	¥3,230	-62.5%	¥128M ($825K)

Frequently asked questions

Who has been buying Gun Ei Chemical Industry Co., Ltd. stock?: 6 distinct investors have filed 7 disclosed large-shareholding filings in Gun Ei Chemical Industry Co., Ltd. (4229), most recently on 2026-04-03. 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 Gun Ei Chemical Industry Co., Ltd. have?: Gun Ei Chemical Industry Co., Ltd. has 7 buy-side and 1 sell-side disclosures on record, covering ¥1.1B ($7.4M) in total reported value, spanning 2024-01-12 to 2026-04-03.
Where does StockDrifts get Gun Ei Chemical Industry 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 Gun Ei Chemical Industry Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.