Who has been buying Kyoei Steel Ltd. stock?

4 distinct investors have filed 2 disclosed large-shareholding filings in Kyoei Steel Ltd. (5440), most recently on 2026-04-06. 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 Kyoei Steel Ltd. have?

Kyoei Steel Ltd. has 2 buy-side and 1 sell-side disclosures on record, covering ¥7.6B ($49.3M) in total reported value, spanning 2021-06-09 to 2026-04-06.

Where does StockDrifts get Kyoei Steel 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.

Kyoei Steel Ltd. 5440

Company

共英製鋼株式会社Kyoei Steel Ltd.

Investors

Buys

Total Value

¥7.6B ($49.3M)

Avg Return

+54.83%

Last Filing

2026-04-06

Kyoei Steel Ltd. (5440) has 2 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥7.6B ($49.3M) in reported transaction value. The earliest filing StockDrifts holds for Kyoei Steel Ltd. is dated 2021-06-09; the most recent is 2026-04-06. 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 +54.83%, 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
2026-04-06	BUY	unknown	エア・ウォーター株式会社	strategic	2.0M	¥2,380	-23.2%	¥4.8B ($30.7M)
2026-04-06	BUY	unknown	エア・ウォーター防災株式会社	other	692.0K	¥2,380	-23.2%	¥1.6B ($10.6M)
2025-03-11	SELL	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.0M	¥1,969	-17.2%	¥1.2B ($7.6M)
2025-03-11	BUY	unknown	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,969	+17.2%	¥1.4B ($8.8M)
2023-04-20	BUY	negotiated	日鉄物産株式会社 NIPPON STEEL TRADING CORPORATION	strategic	603.9K	¥1,674	+37.8%	¥1.0B ($6.5M)
2023-04-20	BUY	negotiated	日本製鉄株式会社 NIPPON STEEL CORPORATION	strategic	11.6M	¥1,674	+37.8%	¥19.4B ($125.2M)
2022-03-31	BUY	unknown	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,339	+72.3%	¥927M ($6.0M)
2022-03-31	BUY	unknown	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,339	+72.3%	¥927M ($6.0M)
2022-03-31	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,339	+72.3%	¥3.5B ($22.5M)
2022-03-31	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,339	+72.3%	¥3.5B ($22.5M)
2021-06-09	BUY	unknown	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,490	+54.8%	¥1.0B ($6.7M)
2021-06-09	BUY	negotiated	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,490	+54.8%	¥1.0B ($6.7M)
2021-06-09	BUY	unknown	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,490	+54.8%	¥1.0B ($6.7M)
2021-06-09	BUY	negotiated	エア・ウォーター防災株式会社 Air Water Disaster Prevention Co., Ltd.	other	692.0K	¥1,490	+54.8%	¥1.0B ($6.7M)
2021-06-09	BUY	negotiated	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,490	+54.8%	¥3.8B ($24.7M)
2021-06-09	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,490	+54.8%	¥3.9B ($25.0M)
2021-06-09	BUY	negotiated	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,490	+54.8%	¥3.8B ($24.7M)
2021-06-09	BUY	unknown	エア・ウォーター株式会社 AIR WATER INC.	strategic	2.6M	¥1,490	+54.8%	¥3.9B ($25.0M)

Frequently asked questions

Who has been buying Kyoei Steel Ltd. stock?: 4 distinct investors have filed 2 disclosed large-shareholding filings in Kyoei Steel Ltd. (5440), most recently on 2026-04-06. 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 Kyoei Steel Ltd. have?: Kyoei Steel Ltd. has 2 buy-side and 1 sell-side disclosures on record, covering ¥7.6B ($49.3M) in total reported value, spanning 2021-06-09 to 2026-04-06.
Where does StockDrifts get Kyoei Steel 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 Kyoei Steel Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.