Who has been buying Obara Group Incorporated stock?

20 distinct investors have filed 62 disclosed large-shareholding filings in Obara Group Incorporated (6877), most recently on 2026-05-12. 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 Obara Group Incorporated have?

Obara Group Incorporated has 62 buy-side and 58 sell-side disclosures on record, covering ¥73.0B ($470.8M) in total reported value, spanning 2021-04-07 to 2026-05-12.

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.

Obara Group Incorporated 6877

Company

OBARA GROUP株式会社Obara Group Incorporated

Investors

Buys

Total Value

¥73.0B ($470.8M)

Avg Return

+33.70%

Last Filing

2026-05-12

Obara Group Incorporated (6877) has 62 disclosed large-shareholding filings and 58 disclosed disposals on record, filed by 20 distinct investors. Together those filings cover ¥73.0B ($470.8M) in reported transaction value. The earliest filing StockDrifts holds for Obara Group Incorporated is dated 2021-04-07; the most recent is 2026-05-12. Across these filings the average return since disclosure is +33.70%, 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
2026-08-21	BUY	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.7M	¥5,730	-8.9%	¥323M ($2.1M)
2026-08-17	BUY	Market Buy	野村アセットマネジメント株式会社	other	304.0K	¥6,090	-14.3%	¥572M ($3.7M)
2026-08-17	SELL	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	¥6,090	+14.3%	¥445M ($2.9M)
2026-08-17	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	743.3K	¥6,090	+14.3%	¥813M ($5.2M)
2026-08-17	BUY	Market Buy	野村證券株式会社	other	1.6M	¥6,090	-14.3%	¥178M ($1.1M)
2026-08-10	SELL	unknown	小原康嗣	other	10	¥5,790	+9.8%	¥14.9B ($96.0M)
2026-08-10	BUY	Market Buy	有限会社馬込興産	other	6.3M	¥5,790	-9.8%	¥14.9B ($96.0M)
2026-08-07	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.6M	¥5,810	+10.2%	¥12M ($78K)
2026-06-22	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.6M	¥6,310	+17.3%	¥119M ($765K)
2026-05-25	BUY	Market Buy	野村アセットマネジメント株式会社	other	202.5K	¥6,330	-17.5%	¥79M ($511K)
2026-05-25	BUY	Market Buy	野村證券株式会社	other	1.5M	¥6,330	-17.5%	¥13M ($85K)
2026-05-25	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.	other	78.8K	¥6,330	-17.5%	¥462M ($3.0M)
2026-05-25	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	887.2K	¥6,330	-17.5%	¥581M ($3.8M)
2026-05-18	BUY	Market Buy	野村證券株式会社	other	1.5M	¥6,330	-17.5%	¥106M ($682K)
2026-05-18	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	788.6K	¥6,330	-17.5%	¥396M ($2.6M)
2026-05-18	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	¥6,330	-	-
2026-05-18	BUY	Market Buy	野村アセットマネジメント株式会社	other	188.4K	¥6,330	-17.5%	¥40M ($256K)
2026-05-12	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	¥6,450	-	-
2026-05-12	BUY	Market Buy	野村證券株式会社	other	1.5M	¥6,450	-19.1%	¥162M ($1.0M)
2026-05-12	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	720.3K	¥6,450	+19.1%	¥67M ($434K)
2026-05-12	BUY	Market Buy	野村アセットマネジメント株式会社	other	182.3K	¥6,450	-19.1%	¥27M ($174K)
2026-04-07	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社 T. Rowe Price Japan, Inc.	passive	1.6M	¥5,270	+0.9%	¥374M ($2.4M)
2026-04-07	BUY	Market Buy	野村證券株式会社	other	1.5M	¥5,270	-0.9%	¥110M ($710K)
2026-04-07	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	732.3K	¥5,270	+0.9%	¥253M ($1.6M)
2026-04-07	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.	other	0	¥5,270	-	-
2026-04-07	BUY	Market Buy	野村アセットマネジメント株式会社	other	163.5K	¥5,270	-0.9%	¥319M ($2.1M)
2026-03-23	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	784.4K	¥5,040	+3.6%	¥1.1B ($7.3M)
2026-03-23	SELL	unknown	野村證券株式会社	other	1.4M	¥5,040	-3.6%	¥11M ($68K)
2026-03-23	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	¥5,040	-	-
2026-03-23	SELL	unknown	野村アセットマネジメント株式会社	other	103.3K	¥5,040	-3.6%	¥11M ($68K)
2026-03-12	BUY	Market Buy	ゼナーアセットマネジメントエルエルピー Zennor Asset Management LLP	activist	1.4M	¥5,680	-8.1%	¥1.6B ($10.6M)
2026-03-09	BUY	unknown	ゼナーアセットマネジメントエルエルピー(Zennor Asset Management LLP) Zennor Asset Management LLP	activist	1.1M	¥6,050	-13.7%	¥6.5B ($41.8M)
2026-03-06	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	538.1K	¥6,310	-17.3%	¥290M ($1.9M)
2026-03-06	SELL	Market Buy	ティー・ロウ・プライス・ジャパン株式会社	passive	1.7M	¥6,310	+17.3%	¥184M ($1.2M)
2026-03-06	SELL	Market Buy	ティー・ロウ・プライス・インターナショナル・リミテッド T. Rowe Price International Ltd.	passive	0	¥6,310	+17.3%	¥171M ($1.1M)
2026-03-06	BUY	Market Buy	野村證券株式会社	other	1.4M	¥6,310	-17.3%	¥237M ($1.5M)
2026-03-06	BUY	Market Buy	野村アセットマネジメント株式会社	other	104.8K	¥6,310	-	-
2026-02-17	SELL	subscription	野村證券株式会社	other	1.5M	¥4,810	-8.5%	¥261M ($1.7M)
2026-02-17	BUY	subscription	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	521.7K	¥4,810	+8.5%	¥552M ($3.6M)
2026-02-17	BUY	subscription	野村アセットマネジメント株式会社	other	104.6K	¥4,810	+8.5%	¥141M ($907K)
2025-11-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.5M	¥4,165	-	-
2025-11-06	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	364.1K	¥4,165	+25.3%	¥43M ($280K)
2025-11-06	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	75.9K	¥4,165	-25.3%	¥678M ($4.4M)
2025-10-20	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.5M	¥4,250	-	-
2025-10-20	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	236.9K	¥4,250	+22.8%	¥390M ($2.5M)
2025-10-20	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	351.8K	¥4,250	-22.8%	¥27M ($172K)
2025-09-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.5M	¥4,375	-	-
2025-09-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	359.4K	¥4,375	-19.3%	¥27M ($177K)
2025-09-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	145.3K	¥4,375	-19.3%	¥228M ($1.5M)
2025-08-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	365.0K	¥4,200	-24.3%	¥9M ($57K)

Showing the 50 most recent of 167 filings.

Frequently asked questions

Who has been buying Obara Group Incorporated stock?: 20 distinct investors have filed 62 disclosed large-shareholding filings in Obara Group Incorporated (6877), most recently on 2026-05-12. 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 Obara Group Incorporated have?: Obara Group Incorporated has 62 buy-side and 58 sell-side disclosures on record, covering ¥73.0B ($470.8M) in total reported value, spanning 2021-04-07 to 2026-05-12.
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.