Who has been buying SanBio Company Limited stock?

6 distinct investors have filed 34 disclosed large-shareholding filings in SanBio Company Limited (4592), most recently on 2026-04-06. 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 SanBio Company Limited have?

SanBio Company Limited has 34 buy-side and 27 sell-side disclosures on record, covering ¥65.4B ($422.0M) in total reported value, spanning 2021-04-09 to 2026-04-06.

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.

SanBio Company Limited 4592

Company

サンバイオ株式会社SanBio Company Limited

Investors

Buys

Total Value

¥65.4B ($422.0M)

Avg Return

+118.64%

Last Filing

2026-04-06

SanBio Company Limited (4592) has 34 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥65.4B ($422.0M) in reported transaction value. The earliest filing StockDrifts holds for SanBio Company Limited is dated 2021-04-09; the most recent is 2026-04-06. Across these filings the average return since disclosure is +118.64%, 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
2026-07-22	SELL	unknown	野村證券株式会社	other	3.3M	¥1,005	+5.4%	¥824M ($5.3M)
2026-07-22	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	364.7K	¥1,005	-5.4%	¥322M ($2.1M)
2026-06-22	SELL	negotiated	森敬太 Keita Mori	activist	6.0M	¥981	+3.1%	¥1.7B ($11.1M)
2026-04-06	BUY	unknown	野村證券株式会社	other	4.2M	¥1,921	-50.5%	¥8.0B ($51.6M)
2026-04-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	44.4K	¥1,921	-50.5%	¥85M ($550K)
2025-12-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	31.9K	¥1,643	+42.1%	¥6.9B ($44.8M)
2025-12-04	SELL	unknown	野村證券株式会社	other	2.9M	¥1,643	+42.1%	¥2.8B ($17.8M)
2025-11-28	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	4.3M	¥2,205	-56.9%	¥34M ($222K)
2025-11-28	SELL	unknown	野村證券株式会社	other	4.5M	¥2,205	+56.9%	¥826M ($5.3M)
2025-11-18	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.5M	¥2,390	-60.2%	¥10.9B ($70.0M)
2025-11-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	3.9M	¥2,390	-60.2%	¥9.4B ($60.4M)
2025-11-12	BUY	negotiated	森敬太 Keita Mori	activist	6.0M	¥2,613	-	¥1.2B ($7.6M)
2025-11-12	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥2,613	+63.6%	¥489M ($3.2M)
2025-11-12	SELL	negotiated	森敬太 Keita Mori	activist	6.0M	¥2,613	+63.6%	¥6.1B ($39.5M)
2025-05-21	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥3,310	+71.3%	¥4.3B ($27.9M)
2024-01-11	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	112.9K	¥708	-	¥80M ($516K)
2024-01-11	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.3M	¥708	+34.3%	¥1.5B ($10.0M)
2023-08-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.9M	¥579	+64.3%	¥2.1B ($13.7M)
2023-08-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-10.0K	¥579	-276.9%	¥56M ($364K)
2023-04-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.3M	¥685	+38.8%	¥3.4B ($21.8M)
2023-04-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	87.1K	¥685	-	¥60M ($385K)
2023-02-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.8M	¥667	+42.6%	¥718M ($4.6M)
2023-02-22	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	59.3K	¥667	-42.6%	¥9M ($56K)
2023-02-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.6M	¥728	+30.6%	¥3.1B ($20.1M)
2023-02-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	70.1K	¥728	-30.6%	¥19M ($120K)
2023-02-03	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥755	-26.0%	¥692M ($4.5M)
2023-01-10	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	6.7M	¥751	+26.6%	¥4.6B ($29.7M)
2023-01-10	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	92.5K	¥751	-	¥69M ($448K)
2022-12-27	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	7.3M	¥788	-20.7%	¥500M ($3.2M)
2022-12-09	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.0M	¥797	+19.3%	¥5.7B ($37.0M)
2022-12-09	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	33.2K	¥797	+19.3%	¥2.4B ($15.6M)
2022-12-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.4M	¥788	+20.7%	¥5.8B ($37.7M)
2022-12-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	90.2K	¥788	+20.7%	¥5M ($31K)
2022-12-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	59.0K	¥788	+20.7%	¥4.8B ($30.9M)
2022-12-01	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	82.5K	¥799	-19.0%	¥5M ($31K)
2022-12-01	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	77.7K	¥799	-	-
2022-12-01	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.9M	¥799	+19.0%	¥6.2B ($40.1M)
2022-11-29	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	9.7M	¥823	+15.6%	¥6.9B ($44.7M)
2022-11-29	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	90.3K	¥823	-15.6%	¥20M ($128K)
2022-11-29	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	77.7K	¥823	-	-
2022-11-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	115.1K	¥845	+12.5%	¥97M ($627K)
2022-11-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	77.7K	¥845	+12.5%	¥66M ($424K)
2022-11-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	10.6M	¥845	+12.5%	¥9.0B ($57.8M)
2022-11-17	BUY	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥869	-	-
2022-07-25	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.9M	¥1,085	-12.3%	¥2.0B ($12.7M)
2022-07-25	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥1,085	+12.3%	¥2.0B ($12.9M)
2022-07-25	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	778.8K	¥1,085	-12.3%	¥65M ($417K)
2022-07-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	689.5K	¥1,025	-7.2%	¥152M ($984K)
2022-07-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.2M	¥1,025	-7.2%	¥4.1B ($26.2M)
2022-06-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	536.9K	¥1,087	+12.5%	¥92M ($593K)

Showing the 50 most recent of 71 filings.

Frequently asked questions

Who has been buying SanBio Company Limited stock?: 6 distinct investors have filed 34 disclosed large-shareholding filings in SanBio Company Limited (4592), most recently on 2026-04-06. 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 SanBio Company Limited have?: SanBio Company Limited has 34 buy-side and 27 sell-side disclosures on record, covering ¥65.4B ($422.0M) in total reported value, spanning 2021-04-09 to 2026-04-06.
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.