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Showa System Engineering Corporation 4752

Company
株式会社昭和システムエンジニアリングShowa System Engineering Corporation
Investors
3
Buys
1
Total Value
¥601M ($3.9M)
Avg Return
-3.20%
Last Filing
2026-02-19

Showa System Engineering Corporation (4752) has 1 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥601M ($3.9M) in reported transaction value. The earliest filing StockDrifts holds for Showa System Engineering Corporation is dated 2026-02-19; the most recent is 2026-02-19. 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 -3.20%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-02-19BUYMarket Buy
古殿 晴美
passive24.3K¥1,624+3.2%¥38M ($246K)
2026-02-19SELLMarket Buy
古殿 恭子
passive304.0K¥1,624+3.2%¥478M ($3.1M)
2026-02-19BUYMarket Buy
有限会社オーエム商事
OM Shoji
passive370.0K¥1,624-3.2%¥601M ($3.9M)
2026-02-19BUYMarket Buy
有限会社オーエム商事
OM Shoji
passive370.0K¥1,624-3.2%¥601M ($3.9M)
2026-02-19BUYMarket Buy
古殿 晴美
passive24.3K¥1,624+3.2%¥38M ($246K)
2026-02-19SELLMarket Buy
古殿 恭子
passive304.0K¥1,624+3.2%¥478M ($3.1M)

Frequently asked questions

Who has been buying Showa System Engineering Corporation stock?
3 distinct investors have filed 1 disclosed large-shareholding filings in Showa System Engineering Corporation (4752), most recently on 2026-02-19. 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 System Engineering Corporation have?
Showa System Engineering Corporation has 1 buy-side and 2 sell-side disclosures on record, covering ¥601M ($3.9M) in total reported value, spanning 2026-02-19 to 2026-02-19.
Where does StockDrifts get Showa System Engineering Corporation 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 System Engineering Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.