StockDrifts LogoStockDrifts

Showa Chemical Industry Co., Ltd. 4990

Company
昭和化学工業株式会社Showa Chemical Industry Co., Ltd.
Investors
2
Buys
0
Total Value
—
Avg Return
—
Last Filing
2025-02-21

Showa Chemical Industry Co., Ltd. (4990) has 0 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 2 distinct investors. The earliest filing StockDrifts holds for Showa Chemical Industry Co., Ltd. is dated 2021-07-15; the most recent is 2025-02-21. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan).

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-07-10BUYMarket Buy
日星工業株式会社
passive94.0K¥498-1.2%¥47M ($302K)
2026-07-10BUYunknown
石橋 健藏
activist1.4M¥498-1.2%¥707M ($4.6M)
2026-07-10BUYMarket Buy
シグマ株式会社
passive1.9M¥498-1.2%¥965M ($6.2M)
2026-07-10BUYunknown
石橋 健藏
activist1.4M¥498-1.2%¥707M ($4.6M)
2026-07-10BUYMarket Buy
シグマ株式会社
passive1.9M¥498-1.2%¥965M ($6.2M)
2025-02-21BUYMarket Buy
シグマ株式会社
Sigma corporation
passive1.9M¥463+13.4%¥897M ($5.8M)
2024-09-11BUYMarket Buy
シグマ株式会社
Sigma corporation
passive1.9M¥461+13.9%¥893M ($5.8M)
2024-09-11BUYunknown
石橋 健藏
Kenzo Ishibashi
activist1.4M¥461+13.9%¥654M ($4.2M)
2021-10-20BUYunknown
石橋 健藏
Kenzo Ishibashi
activist1.4M¥450+16.7%¥639M ($4.1M)
2021-07-15BUYMarket Buy
シグマ株式会社
Sigma corporation
passive1.9M¥483+8.7%¥936M ($6.0M)
2021-07-15BUYMarket Buy
シグマ株式会社
Sigma corporation
passive1.9M¥483+8.7%¥936M ($6.0M)

Frequently asked questions

Who has been buying Showa Chemical Industry Co., Ltd. stock?
2 distinct investors have filed 0 disclosed large-shareholding filings in Showa Chemical Industry Co., Ltd. (4990), most recently on 2025-02-21. 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 Showa Chemical Industry Co., Ltd. have?
Showa Chemical Industry Co., Ltd. has 0 buy-side and 0 sell-side disclosures on record, spanning 2021-07-15 to 2025-02-21.
Where does StockDrifts get Showa 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 Showa Chemical Industry Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.