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Prime Strategy Co., Ltd. 5250

Company
プライム・ストラテジー株式会社Prime Strategy Co., Ltd.
Investors
3
Buys
3
Total Value
¥4.6B ($29.5M)
Avg Return
-43.98%
Last Filing
2026-01-14

Prime Strategy Co., Ltd. (5250) has 3 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥4.6B ($29.5M) in reported transaction value. The earliest filing StockDrifts holds for Prime Strategy Co., Ltd. is dated 2023-02-28; the most recent is 2026-01-14. 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 -43.98%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2026-01-14BUYunknown
中村 八千代
strategic24.7K¥1,244+10.4%¥28M ($178K)
2026-01-14BUYunknown
中村 けん牛
strategic290.7K¥1,244+10.4%¥324M ($2.1M)
2026-01-14BUYunknown
中村 八千代
strategic24.7K¥1,244+10.4%¥28M ($178K)
2026-01-14BUYunknown
中村 けん牛
strategic290.7K¥1,244+10.4%¥324M ($2.1M)
2025-12-26SELLunknown
中村 八千代
strategic24.7K¥1,175+5.1%¥28M ($178K)
2025-12-26SELLunknown
中村 けん牛
strategic290.7K¥1,175+5.1%¥324M ($2.1M)
2025-12-26SELLunknown
中村 八千代
strategic24.7K¥1,175+5.1%¥28M ($178K)
2025-12-26SELLunknown
中村 けん牛
strategic290.7K¥1,175+5.1%¥324M ($2.1M)
2025-12-24BUYacquisition
GMOインターネットグループ株式会社
GMO internet group, Inc.
activist2.2M¥1,206-7.5%¥2.7B ($17.2M)
2025-12-01SELLunknown
中村 八千代
strategic646.4K¥1,519+26.6%¥721M ($4.6M)
2025-12-01SELLunknown
中村 けん牛
strategic1.4M¥1,519+26.6%¥1.6B ($10.4M)
2025-07-11SELLunknown
中村 八千代
Yachiyo Nakamura
strategic646.4K¥1,200+7.1%¥9M ($60K)
2025-07-11SELLunknown
中村 けん牛
Kengyu Nakamura
strategic1.4M¥1,200+7.1%¥22M ($140K)
2024-11-08BUYunknown
中村 八千代
Yachiyo Nakamura
strategic646.4K¥1,080+3.2%¥698M ($4.5M)
2024-11-08BUYunknown
中村 けん牛
Kengyu Nakamura
strategic1.4M¥1,080+3.2%¥1.6B ($10.1M)
2024-09-27SELLunknown
中村 八千代
Yachiyo Nakamura
strategic646.4K¥1,227+9.1%¥45M ($291K)
2024-09-27SELLunknown
中村 けん牛
Kengyu Nakamura
strategic1.4M¥1,227+9.1%¥100M ($646K)
2023-02-28BUYunknown
中村 八千代
Yachiyo Nakamura
strategic646.4K¥2,950-62.2%¥1.9B ($12.3M)
2023-02-28BUYunknown
中村 けん牛
Kengyu Nakamura
activist1.4M¥2,950-62.2%¥4.3B ($27.6M)

Frequently asked questions

Who has been buying Prime Strategy Co., Ltd. stock?
3 distinct investors have filed 3 disclosed large-shareholding filings in Prime Strategy Co., Ltd. (5250), most recently on 2026-01-14. 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 Prime Strategy Co., Ltd. have?
Prime Strategy Co., Ltd. has 3 buy-side and 10 sell-side disclosures on record, covering ¥4.6B ($29.5M) in total reported value, spanning 2023-02-28 to 2026-01-14.
Where does StockDrifts get Prime Strategy 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 Prime Strategy Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.