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R. C. Core Co., Ltd. 7837

Company
株式会社アールシーコアR. C. Core Co., Ltd.
Investors
7
Buys
7
Total Value
¥765M ($4.9M)
Avg Return
-28.22%
Last Filing
2025-11-10

R. C. Core Co., Ltd. (7837) has 7 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥765M ($4.9M) in reported transaction value. The earliest filing StockDrifts holds for R. C. Core Co., Ltd. is dated 2024-03-07; the most recent is 2025-11-10. 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 -28.22%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-11-10BUYnegotiated
谷 秋子
Tani Akiko
activist233.5K¥412-20.6%¥748K ($5K)
2025-11-10BUYnegotiated
谷 秋子
Tani Akiko
activist233.5K¥412-20.6%¥96M ($621K)
2025-10-20SELLnegotiated
安田 周世
Yasuda Shusei
activist0¥636+48.6%¥174M ($1.1M)
2025-10-20SELLnegotiated
二木 敦士
Futagi Atsushi
activist91.4K¥636+48.6%¥115M ($745K)
2025-10-20SELLnegotiated
二木 渉
Futagi Wataru
activist92.1K¥636+48.6%¥115M ($741K)
2025-10-20BUYunknown
旭化成ホームズ株式会社
ASAHI KASEI HOMES CORPORATION
other635.1K¥636-48.6%¥404M ($2.6M)
2025-07-11BUYnegotiated
二木 渉
Wataru Futagi
activist272.8K¥410-20.2%¥112M ($722K)
2025-07-11BUYnegotiated
二木 敦士
Atsushi Futagi
activist272.8K¥410-20.2%¥112M ($722K)
2025-07-11BUYnegotiated
安田 周世
Syusei Yasuda
activist272.9K¥410-20.2%¥112M ($722K)
2025-05-23SELLnegotiated
谷 秋子
Akiko Tani
activist231.9K¥379+13.7%¥21M ($133K)
2024-08-28BUYMarket Buy
二木 浩三
KOZO FUTAGI
activist816.6K¥474-31.0%¥3M ($17K)
2024-05-09BUYMarket Buy
みずほ信託銀行株式会社
Mizuho Trust & Banking Co., Ltd.
other297.9K¥474-31.0%¥23M ($148K)
2024-03-07BUYunknown
みずほ信託銀行株式会社
Mizuho Trust & Banking Co., Ltd.
other249.3K¥443-26.2%¥110M ($713K)

Frequently asked questions

Who has been buying R. C. Core Co., Ltd. stock?
7 distinct investors have filed 7 disclosed large-shareholding filings in R. C. Core Co., Ltd. (7837), most recently on 2025-11-10. 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 R. C. Core Co., Ltd. have?
R. C. Core Co., Ltd. has 7 buy-side and 4 sell-side disclosures on record, covering ¥765M ($4.9M) in total reported value, spanning 2024-03-07 to 2025-11-10.
Where does StockDrifts get R. C. Core 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 R. C. Core Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.