Who has been buying StemRIM stock?

5 distinct investors have filed 4 disclosed large-shareholding filings in StemRIM (4599), most recently on 2024-06-14. 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 StemRIM have?

StemRIM has 4 buy-side and 4 sell-side disclosures on record, covering ¥2.5B ($16.0M) in total reported value, spanning 2021-08-26 to 2024-06-14.

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.

StemRIM 4599

Company

株式会社ステムリムStemRIM

Investors

Buys

Total Value

¥2.5B ($16.0M)

Avg Return

-56.47%

Last Filing

2024-06-14

StemRIM (4599) has 4 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥2.5B ($16.0M) in reported transaction value. The earliest filing StockDrifts holds for StemRIM is dated 2021-08-26; the most recent is 2024-06-14. Across these filings the average return since disclosure is -56.47%, 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
2026-08-27	SELL	unknown	有限会社イー・シー・エス	strategic	425.0K	¥351	+50.1%	¥2M ($14K)
2026-08-27	SELL	unknown	冨田憲介	strategic	3.1M	¥351	+50.1%	¥266M ($1.7M)
2026-08-20	BUY	unknown	有限会社イー・シー・エス	strategic	425.0K	¥355	-	-
2026-08-20	SELL	unknown	冨田憲介	strategic	3.8M	¥355	+50.7%	¥267M ($1.7M)
2026-07-21	SELL	unknown	冨田憲介	strategic	4.6M	¥299	+41.5%	¥144M ($931K)
2026-07-21	SELL	unknown	有限会社イー・シー・エス	strategic	425.0K	¥299	+41.5%	¥43M ($278K)
2026-07-07	SELL	unknown	冨田憲介	strategic	5.1M	¥310	+43.5%	¥150M ($965K)
2026-07-07	SELL	unknown	有限会社イー・シー・エス	strategic	569.0K	¥310	+43.5%	¥52M ($338K)
2024-06-14	BUY	Market Buy	五味大輔 Gomi Daisuke	passive	4.5M	¥408	-57.1%	¥281M ($1.8M)
2023-10-24	BUY	unknown	有限会社イー・シー・エス ECS Ltd.	strategic	717.0K	¥648	-	-
2023-10-24	SELL	unknown	冨田憲介 Tomita Kensuke	activist	5.4M	¥648	+73.0%	¥75M ($485K)
2023-05-26	SELL	unknown	冨田憲介 Tomita Kensuke	activist	5.5M	¥1,007	+82.6%	¥92M ($592K)
2023-05-26	SELL	unknown	有限会社イー・シー・エス ECS Ltd.	strategic	717.0K	¥1,007	+82.6%	¥31M ($197K)
2023-05-02	BUY	unknown	玉井克人 Tamai Katsuto	strategic	10.2M	¥1,254	-	¥2.2B ($14.2M)
2023-05-02	BUY	unknown	玉井克人 Tamai Katsuto	strategic	10.2M	¥1,254	-	¥2.2B ($14.2M)
2023-05-02	BUY	unknown	玉井克人 Tamai Katsuto	strategic	10.2M	¥1,254	-86.0%	¥2.2B ($14.2M)
2022-10-14	BUY	Market Buy	五味大輔 Gomi Daisuke	passive	3.7M	¥796	-	¥558M ($3.6M)
2022-10-14	BUY	Market Buy	五味大輔 Gomi Daisuke	passive	3.7M	¥796	-78.0%	¥558M ($3.6M)
2022-09-02	BUY	Market Buy	五味大輔 Gomi Daisuke	passive	3.0M	¥995	-82.4%	¥3.0B ($19.1M)
2021-08-26	SELL	unknown	大久保俊幸 OKUBO TOSHIYUKI	strategic	2.7M	¥705	+75.2%	¥419M ($2.7M)

Frequently asked questions

Who has been buying StemRIM stock?: 5 distinct investors have filed 4 disclosed large-shareholding filings in StemRIM (4599), most recently on 2024-06-14. 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 StemRIM have?: StemRIM has 4 buy-side and 4 sell-side disclosures on record, covering ¥2.5B ($16.0M) in total reported value, spanning 2021-08-26 to 2024-06-14.
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.