Who has been buying NS Tool Co., Ltd. stock?

4 distinct investors have filed 2 disclosed large-shareholding filings in NS Tool Co., Ltd. (6157), most recently on 2026-03-18. 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 NS Tool Co., Ltd. have?

NS Tool Co., Ltd. has 2 buy-side and 2 sell-side disclosures on record, covering ¥115M ($743K) in total reported value, spanning 2024-10-02 to 2026-03-18.

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.

NS Tool Co., Ltd. 6157

Company

日進工具株式会社NS Tool Co., Ltd.

Investors

Buys

Total Value

¥115M ($743K)

Avg Return

+3.19%

Last Filing

2026-03-18

NS Tool Co., Ltd. (6157) has 2 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥115M ($743K) in reported transaction value. The earliest filing StockDrifts holds for NS Tool Co., Ltd. is dated 2024-10-02; the most recent is 2026-03-18. Across these filings the average return since disclosure is +3.19%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-09-07	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッド (FMR Investment Management (UK) Limited) FMR Investment Management (UK) Limited	other	1.7M	¥832	+1.8%	¥267M ($1.7M)
2026-07-23	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッド (FMR Investment Management (UK) Limited) FMR Investment Management (UK) Limited	other	2.1M	¥956	+14.5%	¥12M ($77K)
2026-06-22	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー (Fidelity Management & Research Company LLC) FIDELITY MANAGEMENT & RESEARCH COMPANY LLC	corporate	1.0M	¥940	-13.1%	¥128M ($827K)
2026-06-22	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.0M	¥940	-	¥128M ($827K)
2026-03-18	SELL	Market Buy	フォレスト・マナー・エヌ・ヴイ(Forest Manor N.V.) Forest Manor N.V.	passive	783.4K	¥901	+9.3%	¥429M ($2.8M)
2025-09-11	SELL	unknown	株式会社ソルプティ Solputi Co., Ltd.	strategic	2.4M	¥843	+3.1%	¥95M ($613K)
2025-09-11	BUY	Market Buy	後藤隆司 Takashi Goto	activist	778.4K	¥843	-3.1%	¥108M ($694K)
2024-10-02	BUY	Market Buy	株式会社エムワイコーポレーション MY CORPORATION	strategic	3.3M	¥755	+8.2%	¥8M ($49K)

Frequently asked questions

Who has been buying NS Tool Co., Ltd. stock?: 4 distinct investors have filed 2 disclosed large-shareholding filings in NS Tool Co., Ltd. (6157), most recently on 2026-03-18. 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 NS Tool Co., Ltd. have?: NS Tool Co., Ltd. has 2 buy-side and 2 sell-side disclosures on record, covering ¥115M ($743K) in total reported value, spanning 2024-10-02 to 2026-03-18.
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.