Who has been buying Shin Nippon Biomedical Laboratories, Ltd. stock?

6 distinct investors have filed 9 disclosed large-shareholding filings in Shin Nippon Biomedical Laboratories, Ltd. (2395), most recently on 2026-04-24. 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 Shin Nippon Biomedical Laboratories, Ltd. have?

Shin Nippon Biomedical Laboratories, Ltd. has 9 buy-side and 4 sell-side disclosures on record, covering ¥19.6B ($126.6M) in total reported value, spanning 2021-09-06 to 2026-04-24.

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.

Shin Nippon Biomedical Laboratories, Ltd. 2395

Company

株式会社新日本科学Shin Nippon Biomedical Laboratories, Ltd.

Investors

Buys

Total Value

¥19.6B ($126.6M)

Avg Return

-1.19%

Last Filing

2026-04-24

Shin Nippon Biomedical Laboratories, Ltd. (2395) has 9 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥19.6B ($126.6M) in reported transaction value. The earliest filing StockDrifts holds for Shin Nippon Biomedical Laboratories, Ltd. is dated 2021-09-06; the most recent is 2026-04-24. Across these filings the average return since disclosure is -1.19%, 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
2026-04-24	BUY	negotiated	Nagata and Company株式会社 Nagata and Company Inc.	activist	16.8M	¥1,437	-	-
2025-12-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.1M	¥1,838	-26.4%	¥3.9B ($24.9M)
2025-12-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社	passive	2.3M	¥1,813	-25.4%	¥777M ($5.0M)
2025-12-05	SELL	Market Buy	SMBC日興証券株式会社	other	16.4K	¥1,813	+25.4%	¥611M ($3.9M)
2025-09-05	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	1.9M	¥1,695	-20.2%	¥3.2B ($20.5M)
2025-09-05	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	354.6K	¥1,695	-20.2%	¥601M ($3.9M)
2024-06-04	BUY	Market Buy	Nagata and Company株式会社 Nagata and Company Inc.	activist	16.8M	¥1,405	-3.8%	¥1.4B ($9.3M)
2023-12-27	SELL	Market Buy	永田一郎 Ichiro Nagata	strategic	0	¥1,678	+19.4%	¥1.7B ($11.1M)
2023-12-27	BUY	Market Buy	Nagata and Company株式会社 Nagata and Company Inc.	activist	15.8M	¥1,678	-19.4%	¥1.8B ($11.6M)
2023-06-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	1.6M	¥2,268	+40.4%	¥1.1B ($7.2M)
2023-01-20	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	2.1M	¥2,238	-39.6%	¥4.8B ($30.8M)
2022-04-22	BUY	Market Buy	Nagata and Company 株式会社 Nagata and Company Inc.	activist	14.7M	¥1,466	-7.8%	¥49M ($315K)
2022-04-22	BUY	Market Buy	永田一郎 Ichiro Nagata	strategic	1.0M	¥1,466	-	-
2021-09-06	BUY	Market Buy	Nagata and Company 株式会社 Nagata and Company Inc.	activist	14.7M	¥864	+56.5%	¥5.8B ($37.5M)
2021-09-06	SELL	Market Buy	有限会社新日本産業 New Japan Sangyo Co., Ltd.	activist	0	¥864	-56.5%	¥5.8B ($37.5M)
2021-09-06	BUY	Market Buy	永田一郎 Ichiro Nagata	strategic	1.0M	¥864	-	-

Frequently asked questions

Who has been buying Shin Nippon Biomedical Laboratories, Ltd. stock?: 6 distinct investors have filed 9 disclosed large-shareholding filings in Shin Nippon Biomedical Laboratories, Ltd. (2395), most recently on 2026-04-24. 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 Shin Nippon Biomedical Laboratories, Ltd. have?: Shin Nippon Biomedical Laboratories, Ltd. has 9 buy-side and 4 sell-side disclosures on record, covering ¥19.6B ($126.6M) in total reported value, spanning 2021-09-06 to 2026-04-24.
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.