Who has been buying The Gunma Bank, Ltd. stock?

11 distinct investors have filed 17 disclosed large-shareholding filings in The Gunma Bank, Ltd. (8334), most recently on 2026-02-06. 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 The Gunma Bank, Ltd. have?

The Gunma Bank, Ltd. has 17 buy-side and 10 sell-side disclosures on record, covering ¥26.3B ($169.5M) in total reported value, spanning 2021-04-07 to 2026-02-06.

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.

The Gunma Bank, Ltd. 8334

Company

株式会社群馬銀行The Gunma Bank, Ltd.

Investors

Buys

Total Value

¥26.3B ($169.5M)

Avg Return

+350.14%

Last Filing

2026-02-06

The Gunma Bank, Ltd. (8334) has 17 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥26.3B ($169.5M) in reported transaction value. The earliest filing StockDrifts holds for The Gunma Bank, Ltd. is dated 2021-04-07; the most recent is 2026-02-06. Across these filings the average return since disclosure is +350.14%, 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
2026-02-06	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー（Capital Research and Management Company） Capital Research and Management Company	passive	24.6M	¥2,173	+38.0%	¥9.5B ($61.6M)
2025-09-22	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	15.7M	¥1,577.5	+90.1%	¥24.7B ($159.3M)
2025-09-22	BUY	Market Buy	キャピタル・インターナショナル・インク(Capital International Capital International, Inc.	passive	1.5M	¥1,577.5	+90.1%	¥2.4B ($15.4M)
2025-09-22	BUY	Market Buy	キャピタル・インターナショナル・エス・エイ・アール・エル Capital International Sarl	passive	967.0K	¥1,577.5	+90.1%	¥1.5B ($9.8M)
2025-09-22	BUY	Market Buy	キャピタル・インターナショナル株式会社 Capital International Co., Ltd.	passive	2.6M	¥1,577.5	+90.1%	¥4.1B ($26.2M)
2023-07-06	SELL	unknown	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	11.1M	¥542.1	-453.3%	¥2.1B ($13.6M)
2023-07-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	5.6M	¥542.1	-453.3%	¥462M ($3.0M)
2022-04-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-95.5K	¥377	-478.3%	¥915M ($5.9M)
2022-04-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.4M	¥377	-	¥1.7B ($10.8M)
2022-04-22	SELL	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	100	¥377	-	¥1.2B ($7.6M)
2022-04-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	16.2M	¥377	-	¥209M ($1.3M)
2021-10-07	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	426.2K	¥372	-	¥1.5B ($9.9M)
2021-10-07	BUY	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	3.2M	¥372	-	¥1.2B ($7.6M)
2021-10-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	2.4M	¥372	-	¥2.4B ($15.2M)
2021-10-07	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.1M	¥372	-	¥16M ($105K)
2021-05-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.6M	¥371	-	¥1.7B ($10.9M)
2021-05-21	BUY	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	100	¥371	-	¥37K ($239)
2021-05-21	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	90.8K	¥371	-	¥34M ($217K)
2021-05-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.2M	¥371	-	¥6.4B ($41.1M)
2021-04-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.6M	¥365	-	¥1.1B ($7.2M)
2021-04-22	SELL	Market Buy	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	100	¥365	-	¥1.2B ($7.5M)
2021-04-22	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	63.7K	¥365	-	¥1.2B ($7.6M)
2021-04-22	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	unknown	0	¥365	-	-
2021-04-22	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	16.9M	¥365	-	¥32M ($205K)
2021-04-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.6M	¥380	-	¥592M ($3.8M)
2021-04-07	BUY	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	3.2M	¥380	-	¥1.2B ($7.8M)
2021-04-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.1M	¥380	-	¥429M ($2.8M)
2021-04-07	BUY	unknown	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥380	-	-
2021-04-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.0M	¥380	-	¥6.5B ($41.8M)

Frequently asked questions

Who has been buying The Gunma Bank, Ltd. stock?: 11 distinct investors have filed 17 disclosed large-shareholding filings in The Gunma Bank, Ltd. (8334), most recently on 2026-02-06. 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 The Gunma Bank, Ltd. have?: The Gunma Bank, Ltd. has 17 buy-side and 10 sell-side disclosures on record, covering ¥26.3B ($169.5M) in total reported value, spanning 2021-04-07 to 2026-02-06.
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.