Who has been buying SymBio Pharmaceuticals Limited stock?

5 distinct investors have filed 9 disclosed large-shareholding filings in SymBio Pharmaceuticals Limited (4582), most recently on 2026-05-13. 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 SymBio Pharmaceuticals Limited have?

SymBio Pharmaceuticals Limited has 9 buy-side and 31 sell-side disclosures on record, covering ¥15.1B ($97.7M) in total reported value, spanning 2022-06-08 to 2026-05-13.

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.

SymBio Pharmaceuticals Limited 4582

Company

シンバイオ製薬株式会社SymBio Pharmaceuticals Limited

Investors

Buys

Total Value

¥15.1B ($97.7M)

Avg Return

-45.96%

Last Filing

2026-05-13

SymBio Pharmaceuticals Limited (4582) has 9 disclosed large-shareholding filings and 31 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥15.1B ($97.7M) in reported transaction value. The earliest filing StockDrifts holds for SymBio Pharmaceuticals Limited is dated 2022-06-08; the most recent is 2026-05-13. Across these filings the average return since disclosure is -45.96%, 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
2026-09-18	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥55	-	-
2026-09-18	SELL	private	エボファンド Evo Fund	engagement	99.1M	¥55	-5.5%	¥52M ($333K)
2026-09-09	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥59	-	-
2026-09-09	BUY	private	エボファンド Evo Fund	engagement	101.2M	¥59	-1.7%	¥2.4B ($15.6M)
2026-09-07	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥60	-	-
2026-09-07	SELL	private	エボファンド Evo Fund	engagement	5.2M	¥60	+3.3%	¥971M ($6.3M)
2026-08-25	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥62	-	-
2026-08-25	BUY	private	エボファンド Evo Fund	engagement	27.2M	¥62	-6.5%	¥139M ($895K)
2026-08-25	BUY	unknown	吉田文紀 YOSHIDA FUMINORI	activist	5.1M	¥62	-	-
2026-08-05	BUY	unknown	吉田文紀 YOSHIDA FUMINORI	activist	5.1M	¥71	-	¥364M ($2.3M)
2026-08-05	BUY	unknown	吉田文紀 YOSHIDA FUMINORI	activist	5.1M	¥71	-18.3%	¥364M ($2.3M)
2026-08-05	SELL	private	エボファンド Evo Fund	engagement	24.4M	¥71	+18.3%	¥212M ($1.4M)
2026-08-05	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥71	-	-
2026-07-08	BUY	private	エボファンド Evo Fund	activist	28.2M	¥69	-15.9%	¥86M ($558K)
2026-07-08	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥69	-	-
2026-07-06	SELL	private	エボファンド Evo Fund	activist	26.5M	¥76	+23.7%	¥139M ($895K)
2026-07-06	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥76	-	-
2026-05-13	SELL	private	エボファンド Evo Fund	activist	28.9M	¥87	+33.3%	¥11M ($72K)
2026-05-13	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥87	-	-
2026-05-08	SELL	private	エボファンド Evo Fund	activist	29.1M	¥91	+36.3%	¥55M ($356K)
2026-05-08	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥91	-	-
2026-04-22	SELL	private	エボファンド Evo Fund	activist	29.9M	¥96	+39.6%	¥81M ($521K)
2026-04-22	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥96	-	-
2026-04-16	SELL	private	エボファンド Evo Fund	activist	31.0M	¥97	+40.2%	¥78M ($502K)
2026-04-16	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥97	-	-
2026-04-08	SELL	private	エボファンド Evo Fund	activist	32.1M	¥108	+46.3%	¥106M ($687K)
2026-04-08	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥108	-	-
2026-03-04	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	5.0M	¥121	+52.1%	¥144M ($931K)
2026-03-02	SELL	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	6.2M	¥147	+60.5%	¥398M ($2.6M)
2026-03-02	BUY	private	キャンターフィッツジェラルドヨーロッパ(Cantor Fitzgerald Europe) Cantor Fitzgerald Europe	passive	6.2M	¥147	-	¥398M ($2.6M)
2026-02-26	SELL	private	エボファンド Evo Fund	activist	32.5M	¥170	+65.9%	¥204M ($1.3M)
2026-02-26	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥170	-	-
2026-02-25	SELL	private	エボファンド Evo Fund	activist	34.2M	¥183	+68.3%	¥130M ($837K)
2026-02-25	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥183	-	-
2026-02-18	SELL	private	エボファンド Evo Fund	activist	35.3M	¥121	+52.1%	¥102M ($657K)
2026-02-18	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥121	-	-
2026-02-10	SELL	private	エボファンド Evo Fund	activist	36.6M	¥88	+34.1%	¥60M ($386K)
2026-02-10	BUY	private	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥88	-	-
2026-01-26	SELL	Market Buy	エボファンド Evo Fund	activist	37.6M	¥89	+34.8%	¥58M ($372K)
2026-01-26	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥89	-	-
2026-01-22	SELL	Market Buy	エボファンド Evo Fund	activist	38.7M	¥92	+37.0%	¥85M ($547K)
2026-01-22	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥92	-	-
2026-01-16	SELL	Market Buy	エボファンド Evo Fund	activist	40.1M	¥90	+35.6%	¥62M ($401K)
2026-01-16	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥90	-	-
2026-01-13	BUY	Market Buy	エボファンド Evo Fund	activist	41.3M	¥90	-35.6%	¥75M ($481K)
2026-01-13	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥90	-	-
2026-01-09	SELL	Market Buy	エボファンド Evo Fund	activist	39.9M	¥91	+36.3%	¥101M ($650K)
2026-01-09	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥91	-	-
2026-01-08	SELL	Market Buy	エボファンド Evo Fund	activist	41.7M	¥90	+35.6%	¥119M ($767K)
2026-01-08	BUY	Market Buy	エボリューション・キャピタル・マネジメント・エルエルシー Evolution Capital Management LLC	passive	0	¥90	-	-

Showing the 50 most recent of 83 filings.

Frequently asked questions

Who has been buying SymBio Pharmaceuticals Limited stock?: 5 distinct investors have filed 9 disclosed large-shareholding filings in SymBio Pharmaceuticals Limited (4582), most recently on 2026-05-13. 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 SymBio Pharmaceuticals Limited have?: SymBio Pharmaceuticals Limited has 9 buy-side and 31 sell-side disclosures on record, covering ¥15.1B ($97.7M) in total reported value, spanning 2022-06-08 to 2026-05-13.
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.