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Harima B.Stem Corporation 9780

Company
株式会社ハリマビステムHarima B.Stem Corporation
Investors
6
Buys
7
Total Value
¥2.2B ($14.1M)
Avg Return
+72.00%
Last Filing
2026-04-07

Harima B.Stem Corporation (9780) has 7 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥2.2B ($14.1M) in reported transaction value. The earliest filing StockDrifts holds for Harima B.Stem Corporation is dated 2021-12-09; the most recent is 2026-04-07. 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 +72.00%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-08-06BUYunknown
鴻 義久
OHTORI YOSHIHISA
activist594.5K¥922+10.1%¥548M ($3.5M)
2026-04-07SELLMarket 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.
passive381.7K¥965+2.5%¥193M ($1.2M)
2025-09-29BUYMarket Buy
株式会社UH Partners 2
UH Partners 2, Inc.
passive108.8K¥856+13.0%¥82M ($526K)
2025-09-29BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive669.5K¥856+13.0%¥573M ($3.7M)
2025-06-09BUYnegotiated
横浜キャピタル株式会社
Yokohama Capital
passive2.4M¥743+30.1%¥1.8B ($11.3M)
2025-06-09BUYnegotiated
株式会社横浜銀行
The Bank of Yokohama. Ltd
strategic247.2K¥743+30.1%¥184M ($1.2M)
2025-04-22SELLMarket 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.
passive582.6K¥700-38.1%¥69M ($448K)
2024-12-20SELLMarket 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.
passive681.4K¥700-38.1%¥69M ($448K)
2023-12-15BUYMarket Buy
株式会社UH Partners 2
UH Partners 2, Inc.
passive2.6K¥659+46.7%¥2M ($11K)
2023-12-15BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive133.9K¥659+46.7%¥11M ($71K)
2022-03-30BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive58.6K¥441+119.3%¥5M ($30K)
2022-03-04SELLunknown
有限会社おおとり
Ootori Company Limited
activist154.8K¥428-125.9%¥21M ($138K)
2022-02-15BUYunknown
有限会社おおとり
Ootori Company Limited
activist805.8K¥410.5+135.6%¥331M ($2.1M)
2021-12-09BUYMarket Buy
光通信株式会社
Hikari Tsushin K.K.
passive48.2K¥422+129.2%¥20M ($131K)

Frequently asked questions

Who has been buying Harima B.Stem Corporation stock?
6 distinct investors have filed 7 disclosed large-shareholding filings in Harima B.Stem Corporation (9780), most recently on 2026-04-07. 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 Harima B.Stem Corporation have?
Harima B.Stem Corporation has 7 buy-side and 4 sell-side disclosures on record, covering ¥2.2B ($14.1M) in total reported value, spanning 2021-12-09 to 2026-04-07.
Where does StockDrifts get Harima B.Stem Corporation 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 Harima B.Stem Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.