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DNA Chip Research Inc. 2397

Company
株式会社DNAチップ研究所DNA Chip Research Inc.
Investors
3
Buys
6
Total Value
¥4.6B ($29.8M)
Avg Return
-1.40%
Last Filing
2025-06-06

DNA Chip Research Inc. (2397) has 6 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥4.6B ($29.8M) in reported transaction value. The earliest filing StockDrifts holds for DNA Chip Research Inc. is dated 2023-02-22; the most recent is 2025-06-06. Across these filings the average return since disclosure is -1.40%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-06-06BUYMarket Buy
みずほ証券 株式会社
Mizuho Securities Co., Ltd.
other488.4K¥1,090+0.2%¥75M ($485K)
2025-04-22BUYunknown
みずほ証券 株式会社
Mizuho Securities Co., Ltd.
other419.3K¥1,091+0.1%¥457M ($3.0M)
2025-04-21SELLunknown
東海東京証券株式会社
Tokai Tokyo Securities Co., Ltd.
other0¥1,091-0.1%¥567M ($3.7M)
2025-04-08BUYacquisition
三井化学株式会社
Mitsui Chemicals, Inc.
activist4.6M¥1,085+0.7%¥4.0B ($25.7M)
2025-02-20BUYunknown
東海東京証券株式会社
Tokai Tokyo Securities Co., Ltd.
other519.7K¥1,092+0.0%¥568M ($3.7M)
2024-03-29BUYMarket Buy
三井化学株式会社
Mitsui Chemicals, Inc.
strategic937.5K¥1,599-31.7%¥607M ($3.9M)
2023-12-13BUYnegotiated
三井化学株式会社
Mitsui Chemicals, Inc.
strategic523.4K¥708--
2023-02-22BUYnegotiated
三井化学株式会社
Mitsui Chemicals, Inc.
strategic523.4K¥892+22.4%¥467M ($3.0M)

Frequently asked questions

Who has been buying DNA Chip Research Inc. stock?
3 distinct investors have filed 6 disclosed large-shareholding filings in DNA Chip Research Inc. (2397), most recently on 2025-06-06. 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 DNA Chip Research Inc. have?
DNA Chip Research Inc. has 6 buy-side and 1 sell-side disclosures on record, covering ¥4.6B ($29.8M) in total reported value, spanning 2023-02-22 to 2025-06-06.
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.