Who has been buying Nippon Primex Inc. stock?

8 distinct investors have filed 4 disclosed large-shareholding filings in Nippon Primex Inc. (2795), most recently on 2025-09-26. 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 Nippon Primex Inc. have?

Nippon Primex Inc. has 4 buy-side and 2 sell-side disclosures on record, covering ¥113M ($727K) in total reported value, spanning 2021-11-29 to 2025-09-26.

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.

Nippon Primex Inc. 2795

Company

日本プリメックス株式会社Nippon Primex Inc.

Investors

Buys

Total Value

¥113M ($727K)

Avg Return

+14.38%

Last Filing

2025-09-26

Nippon Primex Inc. (2795) has 4 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥113M ($727K) in reported transaction value. The earliest filing StockDrifts holds for Nippon Primex Inc. is dated 2021-11-29; the most recent is 2025-09-26. Across these filings the average return since disclosure is +14.38%, 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
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	394.0K	¥878	-	-
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	100.4K	¥878	+10.9%	¥31M ($200K)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	55.5K	¥878	-	-
2025-02-21	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	394.0K	¥890	-	-
2025-02-21	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	65.3K	¥890	+9.4%	¥49M ($317K)
2025-02-21	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	55.5K	¥890	-	-
2023-08-23	SELL	unknown	中川善司 ZENJI NAKAGAWA	activist	1.8M	¥726	-34.2%	¥174M ($1.1M)
2023-08-23	BUY	unknown	中川悦子 Etsuko Nakagawa	other	889.4K	¥726	-	-
2023-08-23	BUY	unknown	雪谷商事株式会社 Yukitani Shoji Co., Ltd.	activist	270.0K	¥726	-	¥196M ($1.3M)
2023-08-23	BUY	unknown	中川亮 Ryo Nakagawa	other	221.4K	¥726	-	-
2023-08-23	BUY	unknown	中川優 Yu Nakagawa	other	221.4K	¥726	-	-
2022-01-18	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	9.7K	¥711	+37.0%	¥2M ($13K)
2022-01-18	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	55.5K	¥711	-	¥39M ($255K)
2022-01-18	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	394.0K	¥711	-37.0%	¥40M ($256K)
2021-11-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	449.5K	¥736	+32.3%	¥30M ($197K)
2021-11-29	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	7.1K	¥736	-	¥5M ($34K)

Frequently asked questions

Who has been buying Nippon Primex Inc. stock?: 8 distinct investors have filed 4 disclosed large-shareholding filings in Nippon Primex Inc. (2795), most recently on 2025-09-26. 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 Nippon Primex Inc. have?: Nippon Primex Inc. has 4 buy-side and 2 sell-side disclosures on record, covering ¥113M ($727K) in total reported value, spanning 2021-11-29 to 2025-09-26.
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.