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Hosoya Pyro-Engineering Co., Ltd. 4274

Company
細谷火工株式会社Hosoya Pyro-Engineering Co., Ltd.
Investors
3
Buys
2
Total Value
¥344M ($2.2M)
Avg Return
+1.09%
Last Filing
2026-03-31

Hosoya Pyro-Engineering Co., Ltd. (4274) has 2 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥344M ($2.2M) in reported transaction value. The earliest filing StockDrifts holds for Hosoya Pyro-Engineering Co., Ltd. is dated 2021-09-10; the most recent is 2026-03-31. 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 +1.09%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-06-17BUYMarket Buy
西武信用金庫
THE SEIBU SHINKIN BANK
strategic265.0K¥1,046+1.3%¥47M ($302K)
2026-03-31BUYnegotiated
西武信用金庫
THE SEIBU SHINKIN BANK
strategic220.0K¥1,341-2.4%¥295M ($1.9M)
2025-04-17SELLunknown
一般社団法人日本文化伝承会館
NIPPON Cultural Tradition Hall
strategic398.1K¥1,044-20.5%¥43M ($277K)
2025-04-14SELLunknown
一般社団法人日本文化伝承会館
NIPPON Cultural Tradition Hall
strategic439.1K¥1,005-25.2%¥59M ($382K)
2022-03-07SELLunknown
一般社団法人日本文化伝承会館
NIPPON Cultural Tradition Hall
strategic498.1K¥1,224-2.8%¥55M ($357K)
2021-09-10BUYMarket Buy
細谷火工共栄会 理事長 細谷 圭二
KEIJI HOSOYA
strategic279.6K¥1,203+4.6%¥49M ($313K)

Frequently asked questions

Who has been buying Hosoya Pyro-Engineering Co., Ltd. stock?
3 distinct investors have filed 2 disclosed large-shareholding filings in Hosoya Pyro-Engineering Co., Ltd. (4274), most recently on 2026-03-31. 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 Hosoya Pyro-Engineering Co., Ltd. have?
Hosoya Pyro-Engineering Co., Ltd. has 2 buy-side and 3 sell-side disclosures on record, covering ¥344M ($2.2M) in total reported value, spanning 2021-09-10 to 2026-03-31.
Where does StockDrifts get Hosoya Pyro-Engineering 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 Hosoya Pyro-Engineering Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.