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Kuramoto Co., Ltd. 5216

Company
株式会社倉元製作所Kuramoto Co., Ltd.
Investors
4
Buys
8
Total Value
¥2.2B ($14.0M)
Avg Return
-22.36%
Last Filing
2026-04-06

Kuramoto Co., Ltd. (5216) has 8 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥2.2B ($14.0M) in reported transaction value. The earliest filing StockDrifts holds for Kuramoto Co., Ltd. is dated 2021-09-09; the most recent is 2026-04-06. Across these filings the average return since disclosure is -22.36%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-07-08BUYMarket Buy
Ample Harvest Capital (Hong Kong) Limited
passive3.4M¥151-5.3%¥516M ($3.3M)
2026-04-06BUYMarket Buy
那須マテリアル株式会社
NASU MATERIAL INC.
passive4.6M¥167-14.4%¥89M ($576K)
2026-04-03BUYMarket Buy
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other15.4M¥167-14.4%¥181M ($1.2M)
2026-01-23SELLunknown
王馳
WANG CHI
other6.4M¥208+31.3%¥109M ($702K)
2025-08-07BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥217--
2025-08-07BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥217--
2025-05-07BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥265--
2025-05-07BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥265--
2025-04-21BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive7.2M¥241-40.7%¥143M ($925K)
2025-03-17BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥242--
2025-03-17BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥242-¥8M ($52K)
2025-03-17BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥242-¥8M ($52K)
2025-01-20BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥218--
2025-01-20BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥218-¥565M ($3.6M)
2025-01-20BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥218-¥565M ($3.6M)
2024-11-18BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥219--
2024-11-05BUYunknown
王馳
WANG CHI
other6.9M¥256-44.1%¥1.8B ($11.4M)
2024-11-05SELLunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥256+44.1%¥310M ($2.0M)
2024-11-05BUYMarket Buy
那須マテリアル株式会社
NASU MATERIAL INC.
passive3.1M¥256-44.1%¥115M ($739K)
2024-11-05BUYMarket Buy
那須マテリアル株式会社
NASU MATERIAL INC.
passive3.1M¥256-¥115M ($739K)
2024-07-24BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥441--
2024-07-24BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥441--
2024-07-24BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥441-¥528M ($3.4M)
2024-07-24BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥441-¥528M ($3.4M)
2024-07-24BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥441-¥528M ($3.4M)
2024-07-05BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other12.8M¥427-¥213M ($1.4M)
2024-07-05BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥427-¥213M ($1.4M)
2024-07-05SELLunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other12.8M¥427+66.5%¥213M ($1.4M)
2024-07-05SELLunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.3M¥427+66.5%¥213M ($1.4M)
2024-07-04BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.8M¥399-¥1.4B ($9.0M)
2024-07-04BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.8M¥399-¥1.4B ($9.0M)
2024-07-04BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.8M¥399-¥1.4B ($9.0M)
2024-07-04BUYunknown
光博有限公司(Prolight Corporation Limited)
Prolight Corporation Limited
other13.8M¥399-64.2%¥1.4B ($9.0M)
2024-04-16BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥233-¥279M ($1.8M)
2024-04-16BUYMarket Buy
渡邉 敏行
TOSHIYUKI WATANABE
passive1.2M¥233-38.6%¥279M ($1.8M)
2021-09-09BUYMarket Buy
那須マテリアル株式会社
NASU MATERIAL INC.
passive2.3M¥158-9.5%¥368M ($2.4M)

Frequently asked questions

Who has been buying Kuramoto Co., Ltd. stock?
4 distinct investors have filed 8 disclosed large-shareholding filings in Kuramoto Co., Ltd. (5216), most recently on 2026-04-06. 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 Kuramoto Co., Ltd. have?
Kuramoto Co., Ltd. has 8 buy-side and 4 sell-side disclosures on record, covering ¥2.2B ($14.0M) in total reported value, spanning 2021-09-09 to 2026-04-06.
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.