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Riken Corundum Company Limited. 5395

Company
理研コランダム株式会社Riken Corundum Company Limited.
Investors
2
Buys
3
Total Value
¥383M ($2.5M)
Avg Return
+37.18%
Last Filing
2024-10-17

Riken Corundum Company Limited. (5395) has 3 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥383M ($2.5M) in reported transaction value. The earliest filing StockDrifts holds for Riken Corundum Company Limited. is dated 2022-11-01; the most recent is 2024-10-17. 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 +37.18%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2024-10-17BUYMarket Buy
オカモト株式会社
OKAMOTO INDUSTRIES, INC.
activist901.9K¥5,080+0.0%¥383M ($2.5M)
2024-10-07SELLMarket Buy
シンプレクス・アセット・マネジメント株式会社
Simplex Asset Management Co., Ltd.
passive0¥5,070-0.2%¥450M ($2.9M)
2024-09-30BUYacquisition
オカモト株式会社
OKAMOTO INDUSTRIES, INC.
activist826.6K¥5,090-0.2%¥1.8B ($11.7M)
2022-11-01BUYMarket Buy
オカモト株式会社
OKAMOTO INDUSTRIES,INC.
other469.0K¥2,399+111.8%¥107M ($691K)
2022-11-01BUYunknown
オカモト株式会社
OKAMOTO INDUSTRIES,INC.
other469.0K¥2,399+111.8%¥107M ($691K)

Frequently asked questions

Who has been buying Riken Corundum Company Limited. stock?
2 distinct investors have filed 3 disclosed large-shareholding filings in Riken Corundum Company Limited. (5395), most recently on 2024-10-17. 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 Riken Corundum Company Limited. have?
Riken Corundum Company Limited. has 3 buy-side and 1 sell-side disclosures on record, covering ¥383M ($2.5M) in total reported value, spanning 2022-11-01 to 2024-10-17.
Where does StockDrifts get Riken Corundum Company Limited. 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 Riken Corundum Company Limited.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.