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Tanaken 1450

Company
田中建設工業株式会社Tanaken
Investors
2
Buys
3
Total Value
¥11.8B ($76.4M)
Avg Return
+39.35%
Last Filing
2025-02-19

Tanaken (1450) has 3 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 2 distinct investors. Together those filings cover ¥11.8B ($76.4M) in reported transaction value. The earliest filing StockDrifts holds for Tanaken is dated 2024-03-19; the most recent is 2025-02-19. 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 +39.35%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-02-19BUYMarket Buy
スリーハンドレッドホールディングス株式会社
Three Hundred Holdings Co., Ltd.
strategic5.2M¥1,257+18.5%¥6.4B ($41.6M)
2025-02-19BUYMarket Buy
田中 俊昭
TANAKA TOSHIAKI
passive222.4K¥1,257+18.5%¥280M ($1.8M)
2024-03-19BUYMarket Buy
スリーハンドレッドホールディングス株式会社
Three Hundred Holdings Co., Ltd.
strategic2.7M¥995+49.8%¥2.7B ($17.4M)
2024-03-19BUYMarket Buy
スリーハンドレッドホールディングス株式会社
Three Hundred Holdings Co., Ltd.
strategic2.7M¥995+49.8%¥2.7B ($17.4M)
2024-03-19BUYMarket Buy
田中 俊昭
TANAKA TOSHIAKI
passive111.2K¥995+49.8%¥111M ($714K)
2024-03-19BUYMarket Buy
田中 俊昭
TANAKA TOSHIAKI
passive111.2K¥995+49.8%¥111M ($714K)

Frequently asked questions

Who has been buying Tanaken stock?
2 distinct investors have filed 3 disclosed large-shareholding filings in Tanaken (1450), most recently on 2025-02-19. 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 Tanaken have?
Tanaken has 3 buy-side and 0 sell-side disclosures on record, covering ¥11.8B ($76.4M) in total reported value, spanning 2024-03-19 to 2025-02-19.
Where does StockDrifts get Tanaken 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 Tanaken. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.