Who has been buying Shibaura Machine Co.,Ltd. stock?

19 distinct investors have filed 47 disclosed large-shareholding filings in Shibaura Machine Co.,Ltd. (6104), most recently on 2026-04-21. 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 Shibaura Machine Co.,Ltd. have?

Shibaura Machine Co.,Ltd. has 47 buy-side and 26 sell-side disclosures on record, covering ¥24.5B ($157.9M) in total reported value, spanning 2021-04-21 to 2026-04-21.

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.

Shibaura Machine Co.,Ltd. 6104

Company

芝浦機械株式会社Shibaura Machine Co.,Ltd.

Investors

Buys

Total Value

¥24.5B ($157.9M)

Avg Return

+29.69%

Last Filing

2026-04-21

Shibaura Machine Co.,Ltd. (6104) has 47 disclosed large-shareholding filings and 26 disclosed disposals on record, filed by 19 distinct investors. Together those filings cover ¥24.5B ($157.9M) in reported transaction value. The earliest filing StockDrifts holds for Shibaura Machine Co.,Ltd. is dated 2021-04-21; the most recent is 2026-04-21. Across these filings the average return since disclosure is +29.69%, 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
2026-09-24	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	2.2M	¥4,540	+0.0%	¥1.4B ($8.7M)
2026-09-16	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	1.9M	¥4,415	+2.8%	¥1.2B ($7.5M)
2026-09-07	SELL	unknown	野村アセットマネジメント株式会社	other	850.9K	¥4,425	-2.6%	¥88M ($567K)
2026-09-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	19.7K	¥4,425	-2.6%	¥1.4B ($9.1M)
2026-09-07	SELL	unknown	野村證券株式会社	other	982.2K	¥4,425	-2.6%	¥143M ($921K)
2026-08-20	BUY	negotiated	三井住友信託銀行株式会社	strategic	137.0K	¥4,290	-	-
2026-08-20	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	519.5K	¥4,290	-5.8%	¥1.1B ($6.9M)
2026-08-20	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	359.9K	¥4,290	-5.8%	¥64M ($412K)
2026-07-06	SELL	unknown	野村證券株式会社	other	1.0M	¥4,625	+1.8%	¥517M ($3.3M)
2026-07-06	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	338.0K	¥4,625	-1.8%	¥1.5B ($9.8M)
2026-07-06	BUY	Market Buy	野村アセットマネジメント株式会社	other	871.9K	¥4,625	-1.8%	¥253M ($1.6M)
2026-06-25	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	1.7M	¥4,430	+2.5%	¥1.7B ($10.9M)
2026-05-21	SELL	unknown	大和アセットマネジメント株式会社	other	372.2K	¥4,620	+1.7%	¥3.6B ($23.5M)
2026-05-21	SELL	unknown	大和証券株式会社	other	166.1K	¥4,620	+1.7%	¥46M ($296K)
2026-04-21	BUY	unknown	大和アセットマネジメント株式会社	other	1.2M	¥4,310	+5.3%	¥5.0B ($32.3M)
2026-04-21	BUY	unknown	大和証券株式会社	other	176.5K	¥4,310	+5.3%	¥761M ($4.9M)
2025-10-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.1M	¥4,355	+4.3%	¥32M ($209K)
2025-10-21	BUY	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	¥4,355	+4.3%	¥32M ($209K)
2025-10-21	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	816.3K	¥4,355	-4.3%	¥86M ($558K)
2025-09-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	137.0K	¥4,325	-	-
2025-09-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	767.2K	¥4,325	-5.0%	¥54M ($346K)
2025-09-19	BUY	negotiated	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	373.7K	¥4,325	+5.0%	¥11M ($69K)
2025-08-22	BUY	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	1.3M	¥3,900	+16.4%	¥5.1B ($32.6M)
2025-08-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	137.0K	¥3,885	+16.9%	¥532M ($3.4M)
2025-08-06	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	780.2K	¥3,885	+16.9%	¥3.0B ($19.6M)
2025-08-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	371.6K	¥3,885	+16.9%	¥1.4B ($9.3M)
2025-04-03	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	837.3K	¥3,445	+31.8%	¥26M ($165K)
2025-04-03	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.1M	¥3,445	+31.8%	¥2.1B ($13.3M)
2025-04-03	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	2.1K	¥3,445	-31.8%	¥872M ($5.6M)
2025-03-07	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	520.4K	¥3,815	+19.0%	¥436M ($2.8M)
2025-03-07	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	500.9K	¥3,815	+19.0%	¥114M ($733K)
2025-03-07	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	829.2K	¥3,815	-19.0%	¥85M ($550K)
2024-11-06	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	406.9K	¥3,720	-22.0%	¥2.3B ($15.1M)
2024-11-06	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	850.3K	¥3,720	+22.0%	¥969M ($6.3M)
2024-11-06	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	471.9K	¥3,720	+22.0%	¥1.8B ($11.8M)
2024-08-20	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.1M	¥3,725	+21.9%	¥1.3B ($8.6M)
2024-08-20	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	-20.5K	¥3,725	-16.9%	¥1.3B ($8.4M)
2024-08-20	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	604.4K	¥3,725	-21.9%	¥388M ($2.5M)
2024-07-05	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	703.0K	¥3,815	-	-
2024-07-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	326.2K	¥3,815	+19.0%	¥503M ($3.2M)
2024-07-05	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	707.8K	¥3,815	-19.0%	¥184M ($1.2M)
2024-06-20	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	702.5K	¥3,770	-20.4%	¥29M ($185K)
2024-06-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	194.7K	¥3,770	+20.4%	¥421M ($2.7M)
2024-06-20	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	756.1K	¥3,770	+20.4%	¥249M ($1.6M)
2024-04-19	BUY	unknown	JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd.	other	2.8K	¥3,405	+33.3%	¥579M ($3.7M)
2024-04-19	BUY	unknown	ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc	other	1.2M	¥3,405	+33.3%	¥4.0B ($25.9M)
2024-04-19	SELL	unknown	ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC	other	13.8K	¥3,405	-33.3%	¥37M ($237K)
2024-04-04	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	89.2K	¥3,540	-28.3%	¥2.7B ($17.6M)
2024-04-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	756.6K	¥3,540	-	¥2.7B ($17.3M)
2024-04-04	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	733.8K	¥3,540	-28.3%	¥29M ($185K)

Showing the 50 most recent of 96 filings.

Frequently asked questions

Who has been buying Shibaura Machine Co.,Ltd. stock?: 19 distinct investors have filed 47 disclosed large-shareholding filings in Shibaura Machine Co.,Ltd. (6104), most recently on 2026-04-21. 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 Shibaura Machine Co.,Ltd. have?: Shibaura Machine Co.,Ltd. has 47 buy-side and 26 sell-side disclosures on record, covering ¥24.5B ($157.9M) in total reported value, spanning 2021-04-21 to 2026-04-21.
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.