StockDrifts LogoStockDrifts

Koei Chemical Company, Limited 4367

Company
広栄化学株式会社Koei Chemical Company, Limited
Investors
3
Buys
4
Total Value
¥4.5B ($29.3M)
Avg Return
-7.33%
Last Filing
2026-05-14

Koei Chemical Company, Limited (4367) has 4 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥4.5B ($29.3M) in reported transaction value. The earliest filing StockDrifts holds for Koei Chemical Company, Limited is dated 2022-04-05; the most recent is 2026-05-14. 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 -7.33%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-07-03BUYacquisition
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
corporate2.7M¥2,749-7.2%¥7.5B ($48.4M)
2026-05-14BUYacquisition
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
corporate2.7M¥2,929-2.6%¥8.0B ($51.6M)
2023-05-30BUYunknown
住化カラー株式会社
Sumika Color Co., Ltd.
strategic6.0K¥2,330-7.7%¥14M ($90K)
2023-05-30BUYunknown
田岡化学工業株式会社
Taoka Chemical Company, Limited
strategic10.0K¥2,330-7.7%¥23M ($150K)
2023-05-30BUYunknown
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
strategic2.7M¥2,330-7.7%¥6.4B ($41.1M)
2022-04-05BUYunknown
住化カラー株式会社
Sumika Color Co., Ltd.
strategic6.0K¥2,320-7.3%¥14M ($90K)
2022-04-05BUYunknown
田岡化学工業株式会社
Taoka Chemical Company, Limited
strategic10.0K¥2,320-7.3%¥2.3B ($14.7M)
2022-04-05BUYunknown
住化カラー株式会社
Sumika Color Co., Ltd.
strategic6.0K¥2,320-7.3%¥14M ($90K)
2022-04-05BUYunknown
田岡化学工業株式会社
Taoka Chemical Company, Limited
strategic10.0K¥2,320-7.3%¥2.3B ($14.7M)
2022-04-05BUYunknown
住化カラー株式会社
Sumika Color Co., Ltd.
unknown6.0K¥2,320-7.3%¥14M ($90K)
2022-04-05BUYunknown
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
strategic2.7M¥2,320-7.3%¥6.3B ($40.9M)
2022-04-05BUYunknown
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
strategic2.7M¥2,320-7.3%¥5M ($29K)
2022-04-05BUYunknown
住友化学株式会社
SUMITOMO CHEMICAL COMPANY, LIMITED
strategic2.7M¥2,320-7.3%¥5M ($29K)

Frequently asked questions

Who has been buying Koei Chemical Company, Limited stock?
3 distinct investors have filed 4 disclosed large-shareholding filings in Koei Chemical Company, Limited (4367), most recently on 2026-05-14. 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 Koei Chemical Company, Limited have?
Koei Chemical Company, Limited has 4 buy-side and 0 sell-side disclosures on record, covering ¥4.5B ($29.3M) in total reported value, spanning 2022-04-05 to 2026-05-14.
Where does StockDrifts get Koei Chemical Company, Limited 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 Koei Chemical Company, Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.