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OPEN Group, Inc. 6572

Company
オープングループ株式会社OPEN Group, Inc.
Investors
2
Buys
0
Total Value
—
Avg Return
—
Last Filing
2025-12-18

OPEN Group, Inc. (6572) has 0 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 2 distinct investors. The earliest filing StockDrifts holds for OPEN Group, Inc. is dated 2021-05-11; the most recent is 2025-12-18. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan).

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-07-24SELLunknown
髙橋 知道
TAKAHASHI TOMOMICHI
activist23.7M¥241-7.0%¥113M ($728K)
2025-12-18BUYunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥323-33.1%¥2.1B ($13.9M)
2025-06-20SELLunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥336+35.7%¥4M ($27K)
2024-08-29SELLunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥224+3.6%¥6M ($36K)
2023-09-27SELLunknown
髙橋 知道
Tomomichi Takahashi
activist23.7M¥333+35.1%¥1.6B ($10.1M)
2023-09-27SELLunknown
髙橋 知道
Tomomichi Takahashi
activist23.7M¥333+35.1%¥14M ($93K)
2023-01-10SELLunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥263+17.9%¥41M ($263K)
2021-10-11BUYunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥581-62.8%¥3.9B ($24.9M)
2021-05-11SELLunknown
大角 暢之
Nobuyuki Osumi
other6.7M¥715+69.8%¥87M ($558K)

Frequently asked questions

Who has been buying OPEN Group, Inc. stock?
2 distinct investors have filed 0 disclosed large-shareholding filings in OPEN Group, Inc. (6572), most recently on 2025-12-18. 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 OPEN Group, Inc. have?
OPEN Group, Inc. has 0 buy-side and 6 sell-side disclosures on record, spanning 2021-05-11 to 2025-12-18.
Where does StockDrifts get OPEN Group, 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 OPEN Group, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.