Who has been buying Konishi Co., Ltd. stock?

6 distinct investors have filed 3 disclosed large-shareholding filings in Konishi Co., Ltd. (4956), most recently on 2025-08-05. 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 Konishi Co., Ltd. have?

Konishi Co., Ltd. has 3 buy-side and 4 sell-side disclosures on record, covering ¥4.6B ($29.6M) in total reported value, spanning 2022-08-30 to 2025-08-05.

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.

Konishi Co., Ltd. 4956

Company

コニシ株式会社Konishi Co., Ltd.

Investors

Buys

Total Value

¥4.6B ($29.6M)

Avg Return

+48.39%

Last Filing

2025-08-05

Konishi Co., Ltd. (4956) has 3 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥4.6B ($29.6M) in reported transaction value. The earliest filing StockDrifts holds for Konishi Co., Ltd. is dated 2022-08-30; the most recent is 2025-08-05. Across these filings the average return since disclosure is +48.39%, 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
2025-08-05	SELL	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	0	¥1,242	-18.5%	¥4.4B ($28.3M)
2023-07-03	BUY	unknown	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	808.3K	¥1,153.5	+27.6%	¥917M ($5.9M)
2023-07-03	SELL	unknown	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	unknown	0	¥1,153.5	-27.6%	¥521M ($3.4M)
2023-07-03	SELL	unknown	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	270.1K	¥1,153.5	-27.6%	¥9M ($61K)
2023-01-16	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.0M	¥850.5	+73.1%	¥1.7B ($11.2M)
2022-08-30	SELL	unknown	コニシ共栄会理事長小黒正義 KONISHIKYOUEIKAI RIJITYOU OGURO MASAYOSHI	unknown	0	¥827	-78.0%	¥1.9B ($12.2M)
2022-08-30	BUY	unknown	コニシ共栄会理事長松本將 KONISHI KYOUEIKAI RIJITYOU MTSUMOTO SYOU	strategic	2.3M	¥827	+78.0%	¥1.9B ($12.5M)

Frequently asked questions

Who has been buying Konishi Co., Ltd. stock?: 6 distinct investors have filed 3 disclosed large-shareholding filings in Konishi Co., Ltd. (4956), most recently on 2025-08-05. 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 Konishi Co., Ltd. have?: Konishi Co., Ltd. has 3 buy-side and 4 sell-side disclosures on record, covering ¥4.6B ($29.6M) in total reported value, spanning 2022-08-30 to 2025-08-05.
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.