Who has been buying Nippon Seiki Co., Ltd. stock?

3 distinct investors have filed 2 disclosed large-shareholding filings in Nippon Seiki Co., Ltd. (7287), most recently on 2025-06-20. 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 Seiki Co., Ltd. have?

Nippon Seiki Co., Ltd. has 2 buy-side and 7 sell-side disclosures on record, covering ¥5.8B ($37.3M) in total reported value, spanning 2021-10-06 to 2025-06-20.

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 Seiki Co., Ltd. 7287

Company

日本精機株式会社Nippon Seiki Co., Ltd.

Investors

Buys

Total Value

¥5.8B ($37.3M)

Avg Return

+110.15%

Last Filing

2025-06-20

Nippon Seiki Co., Ltd. (7287) has 2 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥5.8B ($37.3M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Seiki Co., Ltd. is dated 2021-10-06; the most recent is 2025-06-20. Across these filings the average return since disclosure is +110.15%, 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
2026-06-05	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	2.3M	¥2,689	-4.6%	¥2.3B ($15.0M)
2025-06-20	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	3.8M	¥1,353	+107.9%	¥5.1B ($32.8M)
2025-06-20	BUY	unknown	本田技研工業株式会社 HONDA MOTOR CO., LTD.	other	2.3M	¥1,353	-	¥3.1B ($19.9M)
2023-06-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.4M	¥895	-214.3%	¥807M ($5.2M)
2023-05-10	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	3.3M	¥872	-222.6%	¥775M ($5.0M)
2023-03-23	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	4.2M	¥832	-238.1%	¥588M ($3.8M)
2023-03-07	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	4.9M	¥906	-210.5%	¥657M ($4.2M)
2023-02-14	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	5.7M	¥859	-227.5%	¥560M ($3.6M)
2022-12-27	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	6.3M	¥775	-263.0%	¥472M ($3.0M)
2022-09-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	3.3M	¥826	-240.6%	¥574M ($3.7M)
2021-10-06	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	6.9M	¥1,165	-	¥710M ($4.6M)
2021-10-06	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	6.9M	¥1,165	+141.5%	¥710M ($4.6M)

Frequently asked questions

Who has been buying Nippon Seiki Co., Ltd. stock?: 3 distinct investors have filed 2 disclosed large-shareholding filings in Nippon Seiki Co., Ltd. (7287), most recently on 2025-06-20. 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 Seiki Co., Ltd. have?: Nippon Seiki Co., Ltd. has 2 buy-side and 7 sell-side disclosures on record, covering ¥5.8B ($37.3M) in total reported value, spanning 2021-10-06 to 2025-06-20.
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.