Who has been buying Aichi Steel Corporation stock?

14 distinct investors have filed 12 disclosed large-shareholding filings in Aichi Steel Corporation (5482), most recently on 2026-05-13. 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 Aichi Steel Corporation have?

Aichi Steel Corporation has 12 buy-side and 6 sell-side disclosures on record, covering ¥40.0B ($258.2M) in total reported value, spanning 2021-12-21 to 2026-05-13.

Where does StockDrifts get Aichi Steel Corporation 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.

Aichi Steel Corporation 5482

Company

愛知製鋼株式会社Aichi Steel Corporation

Investors

Buys

Total Value

¥40.0B ($258.2M)

Avg Return

+84.80%

Last Filing

2026-05-13

Aichi Steel Corporation (5482) has 12 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥40.0B ($258.2M) in reported transaction value. The earliest filing StockDrifts holds for Aichi Steel Corporation is dated 2021-12-21; the most recent is 2026-05-13. 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 +84.80%, 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
2026-05-20	BUY	Market Buy	株式会社豊田自動織機	strategic	5.4M	¥2,813	+6.2%	¥4.0B ($25.5M)
2026-05-20	BUY	negotiated	トヨタ不動産株式会社	strategic	1.8M	¥2,813	+6.2%	¥5.2B ($33.5M)
2026-05-13	BUY	Market Buy	トヨタ自動車株式会社	strategic	15.9M	¥2,879	+3.0%	¥7.1B ($46.0M)
2026-05-13	BUY	negotiated	トヨタ不動産株式会社	strategic	1.8M	¥2,879	+3.0%	¥5.3B ($34.3M)
2025-09-16	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	743.1K	¥2,824	-0.7%	¥2.1B ($13.5M)
2025-09-16	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	764.2K	¥2,824	-0.7%	¥2.2B ($13.9M)
2025-09-16	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.9M	¥2,824	-0.7%	¥5.4B ($34.6M)
2025-05-23	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	unknown	0	¥1,880	+49.1%	-
2025-05-23	BUY	unknown	株式会社レノ Reno Inc. (Murakami-linked)	activist	107.3K	¥1,880	+49.1%	¥176M ($1.1M)
2025-05-23	SELL	unknown	野村絢 Aya Nomura (Murakami family)	unknown	0	¥1,880	-49.1%	¥10M ($62K)
2025-05-23	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	4.0M	¥1,880	-49.1%	¥1.1B ($6.9M)
2025-03-07	SELL	negotiated	日本製鉄株式会社 NIPPON STEEL CORPORATION	strategic	1.0M	¥1,852.5	-51.3%	¥932M ($6.0M)
2025-02-21	SELL	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	unknown	0	¥1,810	-54.9%	¥605M ($3.9M)
2025-02-21	BUY	Market Buy	株式会社レノ Reno Inc. (Murakami-linked)	activist	1.4M	¥1,810	+54.9%	¥903M ($5.8M)
2025-02-21	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	529.2K	¥1,810	+54.9%	¥958M ($6.2M)
2025-02-21	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,810	+54.9%	¥181K ($1K)
2025-02-06	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	334.3K	¥1,702.5	+64.6%	¥291M ($1.9M)
2025-02-06	BUY	Market Buy	株式会社レノ Reno Inc. (Murakami-linked)	activist	895.8K	¥1,702.5	+64.6%	¥173M ($1.1M)
2025-02-06	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	529.2K	¥1,702.5	+64.6%	¥901M ($5.8M)
2025-02-06	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,702.5	+64.6%	¥170K ($1K)
2025-01-31	BUY	Market Buy	株式会社南青山不動産 Minami Aoyama Real Estate Co., Ltd.	activist	163.8K	¥1,737.5	+61.3%	¥285M ($1.8M)
2025-01-31	BUY	Market Buy	株式会社レノ Reno Inc. (Murakami-linked)	activist	793.7K	¥1,737.5	+61.3%	¥252M ($1.6M)
2025-01-31	SELL	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	529.2K	¥1,737.5	-61.3%	¥83M ($535K)
2025-01-31	BUY	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,737.5	+61.3%	¥174K ($1K)
2024-10-16	BUY	Market Buy	株式会社レノ Reno Inc. (Murakami-linked)	activist	649.1K	¥1,046.25	+167.9%	¥679M ($4.4M)
2024-10-16	BUY	Market Buy	野村絢 Aya Nomura (Murakami family)	activist	576.7K	¥1,046.25	+167.9%	¥603M ($3.9M)
2024-10-16	SELL	Market Buy	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	100	¥1,046.25	-167.9%	¥454M ($2.9M)
2024-09-24	BUY	unknown	野村絢 Aya Nomura (Murakami family)	activist	576.7K	¥991.25	+182.8%	¥572M ($3.7M)
2024-09-24	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	433.3K	¥991.25	+182.8%	¥430M ($2.8M)
2021-12-21	BUY	negotiated	ダイハツ工業株式会社 Daihatsu Motor Co.,Ltd.	strategic	33.0K	¥613	+357.3%	¥20M ($131K)
2021-12-21	BUY	negotiated	トヨタ車体株式会社 Toyota Auto Body Co., Ltd.	strategic	886.5K	¥613	+357.3%	¥543M ($3.5M)
2021-12-21	BUY	negotiated	関東自動車工業株式会社(現在、トヨタ自動車東日本株式会社)※関東自動車工業株式会社は、平成24年7月1日付でセントラル自動車株式会社およびトヨタ自動車東北株式会社を吸収合併し、トヨタ自動車東日本株式会社に社名変更しております。 Kanto Jidosha Kogyo Co., Ltd. (currently Toyota Motor East Japan Co., Ltd.) *Kanto Jidosha Kogyo Co., Ltd. merged with Central Jidosha Co., Ltd. and Toyota Motor Tohoku Co., Ltd. on July 1, 2012, and changed its name to Toyota Motor East Japan Co., Ltd.	strategic	33.0K	¥613	+357.3%	¥20M ($131K)
2021-12-21	BUY	negotiated	日野自動車株式会社 HINO MOTORS, LTD.	strategic	33.0K	¥613	+357.3%	¥20M ($131K)
2021-12-21	BUY	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	47.2M	¥613	+357.3%	¥28.6B ($184.5M)

Frequently asked questions

Who has been buying Aichi Steel Corporation stock?: 14 distinct investors have filed 12 disclosed large-shareholding filings in Aichi Steel Corporation (5482), most recently on 2026-05-13. 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 Aichi Steel Corporation have?: Aichi Steel Corporation has 12 buy-side and 6 sell-side disclosures on record, covering ¥40.0B ($258.2M) in total reported value, spanning 2021-12-21 to 2026-05-13.
Where does StockDrifts get Aichi Steel Corporation 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 Aichi Steel Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.