Who has been buying Okamoto Industries, Inc. stock?

6 distinct investors have filed 4 disclosed large-shareholding filings in Okamoto Industries, Inc. (5122), most recently on 2026-03-06. 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 Okamoto Industries, Inc. have?

Okamoto Industries, Inc. has 4 buy-side and 2 sell-side disclosures on record, covering ¥6.5B ($42.1M) in total reported value, spanning 2021-05-26 to 2026-03-06.

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.

Okamoto Industries, Inc. 5122

Company

オカモト株式会社Okamoto Industries, Inc.

Investors

Buys

Total Value

¥6.5B ($42.1M)

Avg Return

+19.30%

Last Filing

2026-03-06

Okamoto Industries, Inc. (5122) has 4 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥6.5B ($42.1M) in reported transaction value. The earliest filing StockDrifts holds for Okamoto Industries, Inc. is dated 2021-05-26; the most recent is 2026-03-06. Across these filings the average return since disclosure is +19.30%, 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
2026-07-03	BUY	Market Buy	コバス・アセット・マネジメント・エスジーアイアイシー・エスエー(Cobas Asset Management, SGIIC, SA) Cobas Asset Management, SGIIC, SA	passive	1.1M	¥5,420	+14.4%	¥998M ($6.4M)
2026-03-06	BUY	Market Buy	コバス・アセット・マネジメント・エスジーアイアイシー・エスエー(Cobas Asset Management, SGIIC, SA) Cobas Asset Management, SGIIC, SA	passive	887.0K	¥5,920	+4.7%	¥5.3B ($33.9M)
2025-04-21	BUY	Market Buy	明治安田生命保険相互会社 Meiji Yasuda Life Insurance Company	passive	1.5M	¥5,100	+21.6%	¥1.0B ($6.5M)
2024-03-07	BUY	Market Buy	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	875.2K	¥4,905	+26.4%	¥36M ($229K)
2024-03-07	SELL	Market Buy	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	unknown	0	¥4,905	-26.4%	¥107M ($687K)
2024-03-07	SELL	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	201.7K	¥4,905	-26.4%	¥817M ($5.3M)
2021-05-26	BUY	Market Buy	丸紅株式会社 Marubeni Corporation	strategic	1.4M	¥4,120	+50.5%	¥234M ($1.5M)

Frequently asked questions

Who has been buying Okamoto Industries, Inc. stock?: 6 distinct investors have filed 4 disclosed large-shareholding filings in Okamoto Industries, Inc. (5122), most recently on 2026-03-06. 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 Okamoto Industries, Inc. have?: Okamoto Industries, Inc. has 4 buy-side and 2 sell-side disclosures on record, covering ¥6.5B ($42.1M) in total reported value, spanning 2021-05-26 to 2026-03-06.
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.