Who has been buying Tohoku Steel Co., Ltd. stock?

8 distinct investors have filed 9 disclosed large-shareholding filings in Tohoku Steel Co., Ltd. (5484), most recently on 2025-09-29. 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 Tohoku Steel Co., Ltd. have?

Tohoku Steel Co., Ltd. has 9 buy-side and 5 sell-side disclosures on record, covering ¥3.9B ($25.3M) in total reported value, spanning 2021-03-31 to 2025-09-29.

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.

Tohoku Steel Co., Ltd. 5484

Company

東北特殊鋼株式会社Tohoku Steel Co., Ltd.

Investors

Buys

Total Value

¥3.9B ($25.3M)

Avg Return

+27.85%

Last Filing

2025-09-29

Tohoku Steel Co., Ltd. (5484) has 9 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥3.9B ($25.3M) in reported transaction value. The earliest filing StockDrifts holds for Tohoku Steel Co., Ltd. is dated 2021-03-31; the most recent is 2025-09-29. Across these filings the average return since disclosure is +27.85%, 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
2026-07-06	SELL	acquisition	光通信株式会社	passive	488.1K	¥4,450	+0.1%	¥336M ($2.2M)
2026-07-06	BUY	Market Buy	株式会社UH Partners 2	passive	474.4K	¥4,450	-	-
2026-07-06	BUY	Market Buy	株式会社UH Partners 3	passive	476.5K	¥4,450	-	-
2026-07-06	BUY	Market Buy	株式会社エスアイエル	passive	120.2K	¥4,450	-	-
2026-07-03	BUY	unknown	東京窯業株式会社	unknown	631.0K	¥4,450	-	-
2026-07-03	BUY	unknown	岡谷鋼機株式会社	strategic	752.0K	¥4,450	-	-
2026-07-03	BUY	unknown	東京窯業株式会社	unknown	631.0K	¥4,450	-	-
2026-07-03	SELL	unknown	光通信株式会社	unknown	488.1K	¥4,450	+0.1%	¥336M ($2.2M)
2026-07-03	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,450	-	-
2026-07-03	BUY	unknown	東京窯業株式会社	strategic	631.0K	¥4,450	-	-
2026-07-03	BUY	unknown	岡谷鋼機株式会社	unknown	752.0K	¥4,450	-	-
2026-07-03	SELL	unknown	光通信株式会社	unknown	488.1K	¥4,450	+0.1%	¥336M ($2.2M)
2026-07-03	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,450	-	-
2026-07-03	BUY	Market Buy	大同特殊鋼株式会社	strategic	4.3M	¥4,450	-0.1%	¥7.8B ($50.3M)
2026-07-03	SELL	unknown	光通信株式会社	unknown	488.1K	¥4,450	+0.1%	¥336M ($2.2M)
2026-07-03	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,450	-	-
2026-07-03	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,450	-	-
2026-05-22	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,480	-	-
2026-05-22	BUY	unknown	岡谷鋼機株式会社	strategic	752.0K	¥4,480	-	-
2026-05-22	BUY	Market Buy	東京窯業株式会社	unknown	631.0K	¥4,480	-0.8%	¥166M ($1.1M)
2026-05-22	BUY	unknown	光通信株式会社	unknown	563.6K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,480	-	-
2026-05-22	BUY	unknown	岡谷鋼機株式会社	strategic	752.0K	¥4,480	-0.8%	-
2026-05-22	BUY	unknown	東京窯業株式会社	unknown	631.0K	¥4,480	-0.8%	¥166M ($1.1M)
2026-05-22	BUY	unknown	光通信株式会社	unknown	563.6K	¥4,480	-0.8%	-
2026-05-22	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,480	-0.8%	-
2026-05-22	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,480	-0.8%	-
2026-05-22	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,480	-0.8%	-
2026-05-22	BUY	acquisition	光通信株式会社	passive	563.6K	¥4,480	-	-
2026-05-22	BUY	Market Buy	株式会社UH Partners 2	passive	474.4K	¥4,480	-	-
2026-05-22	BUY	Market Buy	株式会社UH Partners 3	passive	476.5K	¥4,480	-	-
2026-05-22	BUY	Market Buy	株式会社エスアイエル	passive	120.2K	¥4,480	-	-
2026-05-22	BUY	Market Buy	東京窯業株式会社	strategic	631.0K	¥4,480	-0.8%	¥166M ($1.1M)
2026-05-22	BUY	unknown	株式会社UH Partners 3	unknown	476.5K	¥4,480	-	-
2026-05-22	BUY	negotiated	大同特殊鋼株式会社	strategic	2.5M	¥4,480	-	-
2026-05-22	BUY	Market Buy	東京窯業株式会社	unknown	631.0K	¥4,480	-0.8%	¥166M ($1.1M)
2026-05-22	BUY	unknown	光通信株式会社	unknown	563.6K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,480	-	-
2026-05-22	BUY	unknown	光通信株式会社	unknown	563.6K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社UH Partners 2	unknown	474.4K	¥4,480	-	-
2026-05-22	BUY	unknown	株式会社エスアイエル	unknown	120.2K	¥4,480	-	-
2026-05-22	BUY	unknown	岡谷鋼機株式会社	unknown	752.0K	¥4,480	-	-

Showing the 50 most recent of 84 filings.

Frequently asked questions

Who has been buying Tohoku Steel Co., Ltd. stock?: 8 distinct investors have filed 9 disclosed large-shareholding filings in Tohoku Steel Co., Ltd. (5484), most recently on 2025-09-29. 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 Tohoku Steel Co., Ltd. have?: Tohoku Steel Co., Ltd. has 9 buy-side and 5 sell-side disclosures on record, covering ¥3.9B ($25.3M) in total reported value, spanning 2021-03-31 to 2025-09-29.
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.