Who has been buying Hamai Company Limited stock?

7 distinct investors have filed 5 disclosed large-shareholding filings in Hamai Company Limited (6131), most recently on 2025-04-04. 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 Hamai Company Limited have?

Hamai Company Limited has 5 buy-side and 4 sell-side disclosures on record, spanning 2024-12-16 to 2025-04-04.

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.

Hamai Company Limited 6131

Company

浜井産業株式会社Hamai Company Limited

Investors

Buys

Total Value

—

Avg Return

—

Last Filing

2025-04-04

Hamai Company Limited (6131) has 5 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 7 distinct investors. The earliest filing StockDrifts holds for Hamai Company Limited is dated 2024-12-16; the most recent is 2025-04-04.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2025-04-04	SELL	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	0	-	-	-
2025-04-04	SELL	Market Buy	明治安田生命保険相互会社 Meiji Yasuda Life Insurance Company	passive	0	-	-	-
2025-04-01	SELL	Market Buy	株式会社フラクタル・ビジネス Fractal Business Inc.	passive	54.7K	-	-	-
2025-04-01	BUY	Market Buy	奥村学 Manabu Okumura	passive	81.2K	-	-	-
2025-03-28	BUY	acquisition	武藤公明 Kimiaki Muto	activist	9.4K	-	-	-
2025-03-28	BUY	acquisition	株式会社Mint Mint Co., Ltd.	activist	2.8M	-	-	-
2025-03-28	SELL	unknown	株式会社FUJI FUJI CORPORATION	unknown	0	-	-	-
2025-03-28	BUY	unknown	株式会社FUJI FUJI CORPORATION	strategic	320.9K	-	-	-
2025-03-28	BUY	acquisition	株式会社Mint Mint Co., Ltd.	activist	2.8M	-	-	-
2025-03-28	BUY	acquisition	武藤公明 Kimiaki Muto	activist	9.4K	-	-	-
2025-03-25	BUY	acquisition	株式会社Mint Mint Co., Ltd.	activist	2.8M	-	-	-
2025-03-25	BUY	acquisition	武藤公明 Kimiaki Muto	activist	9.4K	-	-	-
2025-03-06	BUY	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	274.5K	-	-	-
2024-12-16	BUY	Market Buy	奥村学 Manabu Okumura	passive	81.2K	-	-	-
2024-12-16	BUY	Market Buy	株式会社フラクタル・ビジネス Fractal Business Inc.	passive	94.7K	-	-	-

Frequently asked questions

Who has been buying Hamai Company Limited stock?: 7 distinct investors have filed 5 disclosed large-shareholding filings in Hamai Company Limited (6131), most recently on 2025-04-04. 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 Hamai Company Limited have?: Hamai Company Limited has 5 buy-side and 4 sell-side disclosures on record, spanning 2024-12-16 to 2025-04-04.
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.