Who has been buying Okano Valve Mfg.Co.Ltd. stock?

5 distinct investors have filed 3 disclosed large-shareholding filings in Okano Valve Mfg.Co.Ltd. (6492), most recently on 2025-12-05. 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 Okano Valve Mfg.Co.Ltd. have?

Okano Valve Mfg.Co.Ltd. has 3 buy-side and 7 sell-side disclosures on record, covering ¥157M ($1.0M) in total reported value, spanning 2021-04-21 to 2025-12-05.

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.

Okano Valve Mfg.Co.Ltd. 6492

Company

岡野バルブ製造株式会社Okano Valve Mfg.Co.Ltd.

Investors

Buys

Total Value

¥157M ($1.0M)

Avg Return

+388.20%

Last Filing

2025-12-05

Okano Valve Mfg.Co.Ltd. (6492) has 3 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥157M ($1.0M) in reported transaction value. The earliest filing StockDrifts holds for Okano Valve Mfg.Co.Ltd. is dated 2021-04-21; the most recent is 2025-12-05. Across these filings the average return since disclosure is +388.20%, 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
2025-12-05	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	89.3K	¥8,010	-84.9%	¥161M ($1.0M)
2025-09-29	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	109.3K	¥8,250	-79.5%	¥22M ($143K)
2023-10-17	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	112.1K	¥2,723	+443.9%	¥60M ($387K)
2023-10-02	SELL	Market Buy	タワー投資顧問株式会社 TOWER INVESTMENT MANAGEMENT Co.,Ltd	passive	89.4K	¥2,568	-476.7%	¥72M ($463K)
2023-09-25	SELL	Market Buy	タワー投資顧問株式会社 TOWER INVESTMENT MANAGEMENT Co.,Ltd	passive	117.4K	¥2,529	-485.6%	¥68M ($436K)
2023-08-30	SELL	Market Buy	タワー投資顧問株式会社 TOWER INVESTMENT MANAGEMENT Co.,Ltd	passive	144.2K	¥2,568	-476.7%	¥52M ($339K)
2023-06-23	SELL	Market Buy	タワー投資顧問株式会社 TOWER INVESTMENT MANAGEMENT Co.,Ltd	activist	164.6K	¥2,740	-440.5%	¥75M ($485K)
2022-10-21	BUY	Market Buy	岡野商事株式会社 OKANO TRADING CO.,LTD.	strategic	392.2K	¥2,817	+425.7%	¥87M ($564K)
2022-10-21	BUY	Market Buy	岡野正敏 Masatoshi Okano	unknown	134.4K	¥2,817	-	¥379M ($2.4M)
2022-02-17	SELL	unknown	三井物産株式会社 Mitsui & Co., LTD.	activist	80.2K	¥2,189	-	¥88M ($565K)
2021-04-21	BUY	Market Buy	タワー投資顧問株式会社 TOWER INVESTMENT MANAGEMENT Co.,Ltd	activist	192.0K	¥2,593	+471.1%	¥10M ($63K)

Frequently asked questions

Who has been buying Okano Valve Mfg.Co.Ltd. stock?: 5 distinct investors have filed 3 disclosed large-shareholding filings in Okano Valve Mfg.Co.Ltd. (6492), most recently on 2025-12-05. 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 Okano Valve Mfg.Co.Ltd. have?: Okano Valve Mfg.Co.Ltd. has 3 buy-side and 7 sell-side disclosures on record, covering ¥157M ($1.0M) in total reported value, spanning 2021-04-21 to 2025-12-05.
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.