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Dynapac Co., Ltd. 3947

Company
ダイナパック株式会社Dynapac Co., Ltd.
Investors
2
Buys
2
Total Value
¥253M ($1.6M)
Avg Return
+40.32%
Last Filing
2026-03-23

Dynapac Co., Ltd. (3947) has 2 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥253M ($1.6M) in reported transaction value. The earliest filing StockDrifts holds for Dynapac Co., Ltd. is dated 2021-10-20; the most recent is 2026-03-23. Across these filings the average return since disclosure is +40.32%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-03-23BUYMarket Buy
ダイナパック取引先持株会 理事長 鈴木敏明
TOSHIAKI SUZUKI
other904.5K¥2,425+1.6%¥253M ($1.6M)
2026-03-23BUYunknown
ダイナパック取引先持株会 理事長 鈴木敏明
TOSHIAKI SUZUKI
other904.5K¥2,425-¥253M ($1.6M)
2023-10-12SELLunknown
ダイナパック取引先持株会 理事長 鈴木敏明
TOSHIAKI SUZUKI
other800.2K¥1,512-63.0%¥390M ($2.5M)
2022-03-11BUYunknown
ダイナパック取引先持株会 理事長 鈴木敏明
Toshiaki Suzuki
other1.1M¥1,300-¥157M ($1.0M)
2022-03-11BUYMarket Buy
ダイナパック取引先持株会 理事長 鈴木敏明
Toshiaki Suzuki
other1.1M¥1,300+89.6%¥157M ($1.0M)
2021-10-20SELLunknown
カゴメ株式会社
KAGOME CO.,LTD.
strategic1.7M¥1,404-75.6%¥155M ($1.0M)

Frequently asked questions

Who has been buying Dynapac Co., Ltd. stock?
2 distinct investors have filed 2 disclosed large-shareholding filings in Dynapac Co., Ltd. (3947), most recently on 2026-03-23. 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 Dynapac Co., Ltd. have?
Dynapac Co., Ltd. has 2 buy-side and 2 sell-side disclosures on record, covering ¥253M ($1.6M) in total reported value, spanning 2021-10-20 to 2026-03-23.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.