Who has been buying Sanyo Special Steel Co., Ltd. stock?

8 distinct investors have filed 10 disclosed large-shareholding filings in Sanyo Special Steel Co., Ltd. (5481), 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 Sanyo Special Steel Co., Ltd. have?

Sanyo Special Steel Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥28.5B ($183.9M) in total reported value, spanning 2021-04-21 to 2025-04-04.

Where does StockDrifts get Sanyo Special Steel 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.

Sanyo Special Steel Co., Ltd. 5481

Company

山陽特殊製鋼株式会社Sanyo Special Steel Co., Ltd.

Investors

Buys

Total Value

¥28.5B ($183.9M)

Avg Return

+12.77%

Last Filing

2025-04-04

Sanyo Special Steel Co., Ltd. (5481) has 10 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥28.5B ($183.9M) in reported transaction value. The earliest filing StockDrifts holds for Sanyo Special Steel Co., Ltd. is dated 2021-04-21; the most recent is 2025-04-04. 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 +12.77%, 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
2025-04-04	BUY	acquisition	日本製鉄株式会社 NIPPON STEEL CORPORATION	activist	54.5M	¥2,738	+0.2%	¥11.7B ($75.4M)
2025-04-04	BUY	acquisition	日本製鉄株式会社 NIPPON STEEL CORPORATION	activist	54.5M	¥2,738	+0.2%	¥11.7B ($75.4M)
2025-03-26	SELL	unknown	山陽特殊製鋼共栄会理事長濵田長伸 Osanobu Hamada	other	0	¥2,742	-0.1%	¥7.5B ($48.3M)
2025-03-25	BUY	acquisition	日本製鉄株式会社 NIPPON STEEL CORPORATION	activist	50.2M	¥2,739	+0.2%	¥62.5B ($403.3M)
2025-02-19	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	750.4K	¥2,744	+0.0%	¥2.0B ($12.7M)
2025-02-19	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	631.3K	¥2,744	+0.0%	¥1.4B ($8.8M)
2025-02-19	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	403.0K	¥2,744	+0.0%	¥1.1B ($7.1M)
2024-01-09	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.2M	¥2,642	+3.9%	¥1.4B ($8.9M)
2024-01-09	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	135.6K	¥2,642	+3.9%	¥358M ($2.3M)
2024-01-09	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	15.6K	¥2,642	+3.9%	¥4.2B ($26.9M)
2023-08-21	BUY	unknown	山陽特殊製鋼共栄会理事長濵田長伸 Osanobu Hamada	strategic	2.7M	¥2,627	+4.5%	¥7.2B ($46.3M)
2023-08-21	BUY	unknown	山陽特殊製鋼共栄会理事長濵田長伸 Osanobu Hamada	strategic	2.7M	¥2,627	+4.5%	¥7.2B ($46.3M)
2022-02-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.7M	¥2,240	+22.5%	¥6.1B ($39.1M)
2022-02-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	55.8K	¥2,240	+22.5%	¥125M ($807K)
2021-04-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	825.7K	¥1,613	-70.1%	¥958M ($6.2M)
2021-04-21	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	974.9K	¥1,613	+70.1%	¥229M ($1.5M)
2021-04-21	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	566.0K	¥1,613	+70.1%	¥913M ($5.9M)

Frequently asked questions

Who has been buying Sanyo Special Steel Co., Ltd. stock?: 8 distinct investors have filed 10 disclosed large-shareholding filings in Sanyo Special Steel Co., Ltd. (5481), 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 Sanyo Special Steel Co., Ltd. have?: Sanyo Special Steel Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥28.5B ($183.9M) in total reported value, spanning 2021-04-21 to 2025-04-04.
Where does StockDrifts get Sanyo Special Steel 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 Sanyo Special Steel Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.