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Softmax Co., Ltd 3671

Company
ソフトマックス株式会社Softmax Co., Ltd
Investors
2
Buys
4
Total Value
¥58M ($375K)
Avg Return
+30.50%
Last Filing
2025-09-26

Softmax Co., Ltd (3671) has 4 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥58M ($375K) in reported transaction value. The earliest filing StockDrifts holds for Softmax Co., Ltd is dated 2025-04-18; the most recent is 2025-09-26. 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 +30.50%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-09-26BUYMarket Buy
株式会社EPARK
EPARK , INC.
passive120.0K¥368-4.9%¥44M ($286K)
2025-09-26BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive1.5M¥368-4.9%¥17M ($108K)
2025-05-02BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive365.8K¥213.24+64.1%¥14M ($89K)
2025-04-18BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive301.3K¥208.76+67.7%¥63M ($406K)

Frequently asked questions

Who has been buying Softmax Co., Ltd stock?
2 distinct investors have filed 4 disclosed large-shareholding filings in Softmax Co., Ltd (3671), most recently on 2025-09-26. 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 Softmax Co., Ltd have?
Softmax Co., Ltd has 4 buy-side and 0 sell-side disclosures on record, covering ¥58M ($375K) in total reported value, spanning 2025-04-18 to 2025-09-26.
Where does StockDrifts get Softmax 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 Softmax Co., Ltd. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.