Who has been buying Voltage Incorporation stock?

4 distinct investors have filed 4 disclosed large-shareholding filings in Voltage Incorporation (3639), most recently on 2026-02-19. 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 Voltage Incorporation have?

Voltage Incorporation has 4 buy-side and 2 sell-side disclosures on record, covering ¥127M ($821K) in total reported value, spanning 2022-07-12 to 2026-02-19.

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.

Voltage Incorporation 3639

Company

株式会社ボルテージVoltage Incorporation

Investors

Buys

Total Value

¥127M ($821K)

Avg Return

-20.41%

Last Filing

2026-02-19

Voltage Incorporation (3639) has 4 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥127M ($821K) in reported transaction value. The earliest filing StockDrifts holds for Voltage Incorporation is dated 2022-07-12; the most recent is 2026-02-19. Across these filings the average return since disclosure is -20.41%, 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	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	215.2K	¥239	+2.1%	¥47M ($301K)
2026-07-07	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	410.4K	¥235	-0.4%	¥96M ($622K)
2026-02-19	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	114.7K	¥248	+5.7%	¥54M ($347K)
2025-11-20	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	331.7K	¥261	-10.3%	¥87M ($559K)
2025-08-21	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	112.7K	¥298	+21.5%	¥64M ($412K)
2025-08-07	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	327.0K	¥286	-18.2%	¥94M ($603K)
2022-07-12	BUY	subscription	津谷祐司 Yuzi Tsutani	activist	877.8K	¥340	-	-
2022-07-12	BUY	negotiated	津谷祐司 Yuzi Tsutani	activist	877.8K	¥340	-	-
2022-07-12	BUY	subscription	津谷奈々子 Nanako Tsuya	activist	428.2K	¥340	-	-
2022-07-12	BUY	subscription	株式会社サードストリート Third Street Co., Ltd.	activist	660.0K	¥340	-31.2%	¥20M ($131K)
2022-07-12	BUY	negotiated	津谷奈々子 Nanako Tsuya	activist	428.2K	¥340	-	-
2022-07-12	BUY	negotiated	株式会社サードストリート Third Street Co., Ltd.	activist	660.0K	¥340	-31.2%	¥20M ($131K)

Frequently asked questions

Who has been buying Voltage Incorporation stock?: 4 distinct investors have filed 4 disclosed large-shareholding filings in Voltage Incorporation (3639), most recently on 2026-02-19. 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 Voltage Incorporation have?: Voltage Incorporation has 4 buy-side and 2 sell-side disclosures on record, covering ¥127M ($821K) in total reported value, spanning 2022-07-12 to 2026-02-19.
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.