Who has been buying Kohoku Kogyo CO.,LTD. stock?

7 distinct investors have filed 22 disclosed large-shareholding filings in Kohoku Kogyo CO.,LTD. (6524), most recently on 2026-03-19. 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 Kohoku Kogyo CO.,LTD. have?

Kohoku Kogyo CO.,LTD. has 22 buy-side and 12 sell-side disclosures on record, covering ¥183.2B ($1.2B) in total reported value, spanning 2021-12-23 to 2026-03-19.

Where does StockDrifts get Kohoku Kogyo CO.,LTD. insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

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.

Kohoku Kogyo CO.,LTD. 6524

Company

湖北工業株式会社Kohoku Kogyo CO.,LTD.

Investors

Buys

Total Value

¥183.2B ($1.2B)

Avg Return

+96.17%

Last Filing

2026-03-19

Kohoku Kogyo CO.,LTD. (6524) has 22 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥183.2B ($1.2B) in reported transaction value. The earliest filing StockDrifts holds for Kohoku Kogyo CO.,LTD. is dated 2021-12-23; the most recent is 2026-03-19. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +96.17%, 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
2026-03-19	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	52.8K	¥4,540	-8.9%	¥261M ($1.7M)
2026-03-19	SELL	Market Buy	シュローダー・インベストメント・マネジメント株式会社	passive	1.1M	¥4,540	-8.9%	¥5.3B ($34.3M)
2026-03-12	SELL	unknown	アイエフマネジメント株式会社	activist	4.7M	¥4,895	-1.0%	¥23.2B ($149.7M)
2026-03-12	BUY	unknown	石井太	activist	11.1M	¥4,895	-1.0%	¥54.8B ($353.4M)
2026-03-12	BUY	Market Buy	アイエフマネジメント株式会社	activist	5.0M	¥4,895	+1.0%	¥24.7B ($159.1M)
2026-03-12	BUY	Market Buy	石井太	activist	11.1M	¥4,895	+1.0%	¥54.8B ($353.4M)
2026-02-20	BUY	Market Buy	石井太	activist	11.1M	¥4,275	+15.7%	¥54.8B ($353.4M)
2026-02-20	BUY	Market Buy	アイエフマネジメント株式会社	activist	4.9M	¥4,275	+15.7%	¥24.5B ($157.8M)
2026-02-20	BUY	Market Buy	石井太	activist	11.1M	¥4,275	+15.7%	¥54.8B ($353.4M)
2026-02-20	BUY	Market Buy	アイエフマネジメント株式会社	activist	4.9M	¥4,275	+15.7%	¥24.5B ($157.8M)
2025-04-04	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	63.5K	¥1,711	+189.0%	¥109M ($701K)
2025-04-04	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	1.4M	¥1,711	+189.0%	¥2.4B ($15.3M)
2025-03-05	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥2,170	+127.9%	¥10.8B ($69.8M)
2025-03-05	SELL	unknown	石井太 Ishii Futoshi	activist	11.1M	¥2,170	-127.9%	¥2.4B ($15.3M)
2025-03-04	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥2,229	+121.8%	¥11.1B ($71.7M)
2025-03-04	SELL	unknown	石井太 Ishii Futoshi	activist	11.1M	¥2,229	-121.8%	¥2.4B ($15.8M)
2025-03-04	SELL	unknown	石井太 Ishii Futoshi	activist	11.1M	¥2,229	-121.8%	¥2.4B ($15.8M)
2025-03-04	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥2,229	+121.8%	¥11.1B ($71.7M)
2025-01-21	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	58.0K	¥2,712	-82.3%	¥51M ($331K)
2025-01-21	SELL	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	1.2M	¥2,712	-82.3%	¥864M ($5.6M)
2024-09-19	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	74.6K	¥3,150	-57.0%	¥153M ($988K)
2024-09-19	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	1.6M	¥3,150	+57.0%	¥4.8B ($31.3M)
2024-06-07	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥2,293	+115.7%	¥11.4B ($73.8M)
2024-06-07	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥2,293	+115.7%	¥11.4B ($73.8M)
2024-06-07	BUY	unknown	石井太 Ishii Futoshi	activist	12.2M	¥2,293	+115.7%	¥27.9B ($180.1M)
2024-06-07	BUY	unknown	石井太 Ishii Futoshi	activist	12.2M	¥2,293	+115.7%	¥27.9B ($180.1M)
2024-05-01	BUY	unknown	石井太 Ishii Futoshi	activist	12.2M	¥1,969	+151.1%	¥24.0B ($154.6M)
2024-05-01	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥1,969	+151.1%	¥9.8B ($63.4M)
2024-05-01	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	5.0M	¥1,969	+151.1%	¥9.8B ($63.4M)
2024-05-01	BUY	unknown	石井太 Ishii Futoshi	activist	12.2M	¥1,969	+151.1%	¥24.0B ($154.6M)
2023-07-06	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	41.1K	¥2,150	+130.0%	¥19M ($125K)
2023-07-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	614.5K	¥2,150	+130.0%	¥269M ($1.7M)
2023-04-20	SELL	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	32.1K	¥1,710	-189.2%	¥648M ($4.2M)
2023-04-20	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	489.7K	¥1,710	+189.2%	¥756M ($4.9M)
2023-02-06	BUY	Market Buy	シュローダー・インベストメント・マネージメント・リミテッド Schroder Investment Management Limited	passive	411.4K	¥2,106.66	+134.7%	¥867M ($5.6M)
2023-02-06	BUY	Market Buy	シュローダー・インベストメント・マネジメント株式会社 Schroder Investment Management(Japan)Limited	passive	47.9K	¥2,106.66	+134.7%	¥101M ($651K)
2022-06-07	SELL	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	52.0K	¥2,320	-113.2%	¥77M ($498K)
2022-06-07	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.4K	¥2,320	+113.2%	¥374M ($2.4M)
2022-06-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	341.0K	¥2,320	+113.2%	¥780M ($5.0M)
2022-03-07	BUY	Market Buy	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	85.1K	¥2,516.66	+96.5%	¥84M ($541K)
2022-03-07	BUY	Market Buy	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	19.3K	¥2,516.66	+96.5%	¥49M ($313K)
2022-03-07	BUY	Market Buy	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	495.5K	¥2,516.66	+96.5%	¥190M ($1.2M)
2022-02-07	BUY	unknown	アセットマネジメントOneインターナショナル Asset Management One International Ltd.	other	52.0K	¥2,146.66	+130.4%	¥112M ($720K)
2022-02-07	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	420.3K	¥2,146.66	+130.4%	¥902M ($5.8M)
2022-01-07	SELL	unknown	石井太 Ishii Futoshi	activist	4.1M	¥2,600	-90.2%	¥1.0B ($6.6M)
2022-01-07	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	1.7M	¥2,600	+90.2%	¥4.3B ($27.9M)
2021-12-23	BUY	unknown	アイエフマネジメント株式会社 IF Management Co., Ltd.	activist	1.7M	¥2,370	+108.7%	¥3.9B ($25.4M)
2021-12-23	BUY	unknown	石井太 Ishii Futoshi	activist	4.4M	¥2,370	+108.7%	¥10.5B ($68.0M)

Frequently asked questions

Who has been buying Kohoku Kogyo CO.,LTD. stock?: 7 distinct investors have filed 22 disclosed large-shareholding filings in Kohoku Kogyo CO.,LTD. (6524), most recently on 2026-03-19. 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 Kohoku Kogyo CO.,LTD. have?: Kohoku Kogyo CO.,LTD. has 22 buy-side and 12 sell-side disclosures on record, covering ¥183.2B ($1.2B) in total reported value, spanning 2021-12-23 to 2026-03-19.
Where does StockDrifts get Kohoku Kogyo CO.,LTD. insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
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.

Source filings

Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Kohoku Kogyo CO.,LTD.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.