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.

Where does StockDrifts get SanBio Company Limited insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

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. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). 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	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	+3.8%	¥322M ($2.1M)
2026-07-22	SELL	unknown	野村證券株式会社	other	3.3M	¥1,005	-3.8%	¥824M ($5.3M)
2026-06-22	SELL	negotiated	森敬太 Keita Mori	activist	6.0M	¥981	-5.5%	¥1.7B ($11.1M)
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	+2.5%	¥85M ($550K)
2026-04-06	BUY	unknown	野村證券株式会社	other	4.2M	¥1,921	+2.5%	¥8.0B ($51.6M)
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	-32.8%	¥70M ($449K)
2025-12-04	SELL	unknown	野村證券株式会社	other	2.9M	¥1,643	-32.8%	¥6.3B ($40.3M)
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	-1.0%	¥9.3B ($60.0M)
2025-11-28	SELL	unknown	野村證券株式会社	other	4.5M	¥2,205	+1.0%	¥9.9B ($63.9M)
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	-8.7%	¥9.4B ($60.4M)
2025-11-18	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.5M	¥2,390	-8.7%	¥10.9B ($70.0M)
2025-11-12	SELL	negotiated	森敬太 Keita Mori	activist	6.0M	¥2,613	+16.5%	¥6.1B ($39.5M)
2025-11-12	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥2,613	+16.5%	¥489M ($3.2M)
2025-05-21	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥3,310	+34.1%	¥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	+208.2%	¥80M ($516K)
2024-01-11	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	2.3M	¥708	+208.2%	¥1.5B ($10.0M)
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)
2023-08-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	3.9M	¥579	+276.9%	¥2.1B ($13.7M)
2023-04-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.3M	¥685	+218.5%	¥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	+218.5%	¥60M ($385K)
2023-02-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.8M	¥667	+227.1%	¥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	-227.1%	¥9M ($56K)
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	-199.7%	¥19M ($120K)
2023-02-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.6M	¥728	+199.7%	¥3.1B ($20.1M)
2023-02-03	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥755	-189.0%	¥692M ($4.5M)
2023-01-10	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	6.7M	¥751	+190.6%	¥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	+190.6%	¥69M ($448K)
2022-12-27	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	7.3M	¥788	-176.9%	¥500M ($3.2M)
2022-12-09	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.0M	¥797	+173.8%	¥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	+173.8%	¥2.4B ($15.6M)
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	+176.9%	¥4.8B ($30.9M)
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	+176.9%	¥5M ($31K)
2022-12-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.4M	¥788	+176.9%	¥5.8B ($37.7M)
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	-173.1%	¥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	+173.1%	¥62M ($401K)
2022-12-01	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	8.9M	¥799	+173.1%	¥6.2B ($40.1M)
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	+165.1%	¥64M ($413K)
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	-165.1%	¥20M ($128K)
2022-11-29	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	9.7M	¥823	+165.1%	¥6.9B ($44.7M)
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	+158.2%	¥66M ($424K)
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	+158.2%	¥97M ($627K)
2022-11-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	10.6M	¥845	+158.2%	¥9.0B ($57.8M)
2022-11-17	BUY	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥869	+151.1%	¥10.6B ($68.5M)
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	+101.1%	¥65M ($417K)
2022-07-25	SELL	negotiated	川西徹 Kawanishi Toru	activist	12.2M	¥1,085	-101.1%	¥2.0B ($12.9M)
2022-07-25	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.9M	¥1,085	+101.1%	¥2.0B ($12.7M)
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	+112.9%	¥152M ($984K)
2022-07-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.2M	¥1,025	+112.9%	¥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	-100.7%	¥92M ($593K)
2022-06-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	5.0M	¥1,087	+100.7%	¥5.1B ($32.8M)

Showing the 50 most recent of 70 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.
Where does StockDrifts get SanBio Company Limited insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
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.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for SanBio Company Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.