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Komaihaltec Inc. 5915

Company
株式会社駒井ハルテックKomaihaltec Inc.
Investors
4
Buys
4
Total Value
¥137M ($884K)
Avg Return
-2.17%
Last Filing
2026-05-01

Komaihaltec Inc. (5915) has 4 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥137M ($884K) in reported transaction value. The earliest filing StockDrifts holds for Komaihaltec Inc. is dated 2022-09-02; the most recent is 2026-05-01. 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 -2.17%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-07-06BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement510.2K¥2,312-2.0%¥95M ($616K)
2026-05-25BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement468.7K¥2,152+8.2%¥109M ($704K)
2026-05-01BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement418.2K¥2,623-14.6%¥137M ($884K)
2026-04-24BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement365.8K¥2,835-24.0%¥154M ($991K)
2026-04-17BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement311.9K¥2,559-7.7%¥159M ($1.0M)
2026-04-08BUYMarket Buy
ソン ユウ ニン(Sun You Ning)
Sun You Ning
engagement249.8K¥2,131+25.7%¥532M ($3.4M)
2022-11-09BUYnegotiated
JFE鋼材株式会社
JFE Steel Corporation
strategic14.1K¥1,564+66.1%¥22M ($142K)
2022-11-09BUYnegotiated
JFE商事鉄鋼建材株式会社
JFE Shoji Steel Construction Materials Co., Ltd.
strategic140.0K¥1,564+66.1%¥219M ($1.4M)
2022-11-09SELLnegotiated
JFEスチール株式会社
JFE Steel Corporation
strategic60.9K¥1,564-66.1%¥79M ($512K)
2022-09-02BUYnegotiated
JFE鋼材株式会社
JFE Steel Corporation
strategic14.1K¥1,659+56.6%¥23M ($150K)
2022-09-02BUYnegotiated
JFE商事鉄鋼建材株式会社
JFE Shoji Steel Construction Materials Co., Ltd.
strategic140.0K¥1,659+56.6%¥232M ($1.5M)
2022-09-02BUYnegotiated
JFEスチール株式会社
JFE Steel Corporation
strategic111.8K¥1,659+56.6%¥186M ($1.2M)

Frequently asked questions

Who has been buying Komaihaltec Inc. stock?
4 distinct investors have filed 4 disclosed large-shareholding filings in Komaihaltec Inc. (5915), most recently on 2026-05-01. 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 Komaihaltec Inc. have?
Komaihaltec Inc. has 4 buy-side and 1 sell-side disclosures on record, covering ¥137M ($884K) in total reported value, spanning 2022-09-02 to 2026-05-01.
Where does StockDrifts get Komaihaltec Inc. 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 Komaihaltec Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.