Who has been buying Okamoto Glass Co., Ltd. stock?

6 distinct investors have filed 9 disclosed large-shareholding filings in Okamoto Glass Co., Ltd. (7746), most recently on 2025-11-26. 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 Okamoto Glass Co., Ltd. have?

Okamoto Glass Co., Ltd. has 9 buy-side and 18 sell-side disclosures on record, covering ¥5.1B ($32.8M) in total reported value, spanning 2023-02-28 to 2025-11-26.

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.

Okamoto Glass Co., Ltd. 7746

Company

岡本硝子株式会社Okamoto Glass Co., Ltd.

Investors

Buys

Total Value

¥5.1B ($32.8M)

Avg Return

+547.06%

Last Filing

2025-11-26

Okamoto Glass Co., Ltd. (7746) has 9 disclosed large-shareholding filings and 18 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥5.1B ($32.8M) in reported transaction value. The earliest filing StockDrifts holds for Okamoto Glass Co., Ltd. is dated 2023-02-28; the most recent is 2025-11-26. Across these filings the average return since disclosure is +547.06%, 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
2026-08-07	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	19.4K	¥748	+8.4%	¥18M ($115K)
2026-08-07	SELL	unknown	野村證券株式会社	other	1.5M	¥748	-8.4%	¥398M ($2.6M)
2026-07-23	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-5.8K	¥767	+1.2%	-
2026-07-23	SELL	unknown	野村證券株式会社	other	2.1M	¥767	-5.7%	¥212M ($1.4M)
2026-06-22	BUY	unknown	野村證券株式会社	other	2.4M	¥802	+1.1%	¥1.9B ($12.3M)
2026-06-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	110.5K	¥802	+1.1%	¥89M ($572K)
2025-11-26	SELL	negotiated	岡本毅	activist	779.2K	¥300	-170.3%	¥49M ($316K)
2025-11-26	SELL	negotiated	岡本峻	strategic	264.0K	¥300	-170.3%	¥17M ($107K)
2025-11-26	SELL	negotiated	有限会社オー・ジー・シー	activist	4.3M	¥300	-170.3%	¥274M ($1.8M)
2025-11-26	SELL	negotiated	岡本興産有限会社	activist	878.9K	¥300	-170.3%	¥85M ($547K)
2025-09-17	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	201.7K	¥265	+206.0%	¥4.2B ($27.3M)
2025-09-12	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	5.0M	¥392	+106.9%	¥51M ($329K)
2025-09-11	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	4.9M	¥312	-159.9%	¥63M ($407K)
2025-09-11	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	0	¥312	-159.9%	¥42M ($271K)
2025-09-09	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	134.4K	¥238	-	¥32M ($206K)
2025-09-09	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	5.1M	¥238	-240.8%	¥63M ($406K)
2025-08-19	SELL	negotiated	岡本毅 TsuyoshiOkamoto	activist	779.2K	¥180	-350.6%	¥4M ($28K)
2025-08-19	SELL	negotiated	有限会社オー・ジー・シー OGC Ltd.	activist	4.3M	¥180	-350.6%	¥25M ($162K)
2025-08-19	SELL	negotiated	岡本峻 Shun Okamoto	strategic	264.0K	¥180	-350.6%	¥1M ($8K)
2025-08-19	SELL	negotiated	岡本興産有限会社 Okamoto Kosan Co., Ltd.	activist	958.9K	¥180	-350.6%	¥16M ($106K)
2025-07-01	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	5.3M	¥154	-426.6%	¥36M ($234K)
2025-06-24	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	5.7M	¥148	-448.0%	¥27M ($174K)
2025-06-13	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	6.0M	¥152	+433.6%	¥909M ($5.9M)
2024-12-05	BUY	negotiated	岡本毅 TsuyoshiOkamoto	activist	778.3K	¥219	-	-
2024-12-05	SELL	negotiated	岡本興産有限会社 Okamoto Kosan Co., Ltd.	activist	1.0M	¥219	-270.3%	¥53M ($339K)
2024-12-05	BUY	negotiated	有限会社オー・ジー・シー OGC Ltd.	activist	4.3M	¥219	+270.3%	¥44M ($283K)
2024-12-05	BUY	negotiated	岡本峻 Shun Okamoto	strategic	264.0K	¥219	-	-
2024-02-26	BUY	negotiated	岡本峻 Shun Okamoto	strategic	264.0K	¥131	-	¥34M ($223K)
2024-02-26	SELL	negotiated	岡本興産有限会社 Okamoto Kosan Co., Ltd.	activist	1.3M	¥131	-	¥414M ($2.7M)
2024-02-26	BUY	negotiated	有限会社オー・ジー・シー OGC Ltd.	activist	4.1M	¥131	-	¥402M ($2.6M)
2024-02-26	BUY	negotiated	岡本峻 Shun Okamoto	strategic	264.0K	¥131	-	¥34M ($223K)
2024-02-26	BUY	negotiated	岡本毅 TsuyoshiOkamoto	activist	777.6K	¥131	-	-
2024-02-26	BUY	negotiated	岡本毅 TsuyoshiOkamoto	activist	777.6K	¥131	-	-
2024-02-26	SELL	negotiated	岡本興産有限会社 Okamoto Kosan Co., Ltd.	activist	1.3M	¥131	-	¥414M ($2.7M)
2024-02-26	BUY	negotiated	有限会社オー・ジー・シー OGC Ltd.	activist	4.1M	¥131	-	¥402M ($2.6M)
2023-02-28	BUY	Market Buy	岡本毅 TsuyoshiOkamoto	activist	777.6K	¥140	+479.3%	¥3M ($17K)
2023-02-28	SELL	Market Buy	岡本興産有限会社 Okamoto Kosan Co., Ltd.	activist	4.4M	¥140	-479.3%	¥35M ($227K)
2023-02-28	SELL	Market Buy	有限会社オー・ジー・シー OGC Ltd.	activist	1.1M	¥140	-479.3%	¥653K ($4K)

Frequently asked questions

Who has been buying Okamoto Glass Co., Ltd. stock?: 6 distinct investors have filed 9 disclosed large-shareholding filings in Okamoto Glass Co., Ltd. (7746), most recently on 2025-11-26. 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 Okamoto Glass Co., Ltd. have?: Okamoto Glass Co., Ltd. has 9 buy-side and 18 sell-side disclosures on record, covering ¥5.1B ($32.8M) in total reported value, spanning 2023-02-28 to 2025-11-26.
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.