Who has been buying Aju Steel stock?

2 distinct insiders have filed 1 disclosed insider purchases in Aju Steel (139990), most recently on 2026-06-11. 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 Aju Steel have?

Aju Steel has 1 buy-side and 5 sell-side disclosures on record, covering ₩26M ($18K) in total reported value, spanning 2024-08-07 to 2026-06-11.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Aju Steel 139990

Company

아주스틸Aju Steel

Insiders

Buys

Total Value

₩26M ($18K)

Avg Return

+33.08%

Last Filing

2026-06-11

Aju Steel (139990) has 1 disclosed insider purchases and 5 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩26M ($18K) in reported transaction value. The earliest filing StockDrifts holds for Aju Steel is dated 2024-08-07; the most recent is 2026-06-11. Across these filings the average return since disclosure is +33.08%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-06-11	BUY	행사가액조정	동국씨엠 Dongguk CM	-	1.4M	-	-	-
2025-12-11	BUY	행사가액조정	동국씨엠 Dongguk CM	-	1.7M	₩3,525	-7.4%	₩5.8B ($4.1M)
2025-01-08	BUY	제3자배정유상증자	동국씨엠 Dongguk CM	-	11.4M	₩4,175	-21.8%	₩47.4B ($32.9M)
2025-01-07	SELL	장외매도	윤미숙 Mi-sook Yoon	-	-3.2M	₩4,100	+20.4%	₩13.0B ($9.0M)
2025-01-07	BUY	장외매수	동국씨엠 Dongguk CM	-	11.2M	₩4,100	-20.4%	₩46.1B ($32.0M)
2025-01-07	SELL	장외매도	이학연 Hak-yeon Lee	CEO	-8.1M	₩4,100	+20.4%	₩33.1B ($23.0M)
2024-12-11	BUY	CB인수	동국씨엠 Dongguk CM	-	7.1M	₩3,970	-17.8%	₩28.1B ($19.5M)
2024-08-26	BUY	교환	이영세 Youngse Lee	President/CTO	564	₩5,550	-41.2%	₩3M ($2K)
2024-08-26	BUY	교환	윤미숙 Mi-sook Yoon	-	30.1K	₩5,550	-41.2%	₩167M ($116K)
2024-08-26	BUY	교환	이학연 Hak-yeon Lee	CEO	198	₩5,550	-41.2%	₩1M ($763)
2024-08-26	BUY	교환	이도연 Lee Do-yeon	Director (Executive Officer)	504	₩5,550	-41.2%	₩3M ($2K)
2024-08-26	BUY	Market Buy	이영세 Youngse Lee	President/CTO	808	₩5,550	-41.2%	₩4M ($3K)
2024-08-07	SELL	Market Sell	이도연 Lee Do-yeon	Director (Executive Officer)	-593	₩6,270	+47.9%	₩4M ($3K)
2024-08-07	SELL	Market Sell	이도연 Lee Do-yeon	Director (Executive Officer)	-1.0K	₩6,270	+47.9%	₩6M ($4K)
2024-08-07	SELL	Market Sell	이도연 Lee Do-yeon	Director (Executive Officer)	-860	₩6,270	+47.9%	₩5M ($4K)
2024-08-07	SELL	Market Sell	이도연 Lee Do-yeon	Director (Executive Officer)	-1.0K	₩6,270	+47.9%	₩6M ($4K)
2024-08-07	SELL	Market Sell	이도연 Lee Do-yeon	Director (Executive Officer)	-47	₩6,270	+47.9%	₩295K ($205)

Frequently asked questions

Who has been buying Aju Steel stock?: 2 distinct insiders have filed 1 disclosed insider purchases in Aju Steel (139990), most recently on 2026-06-11. 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 Aju Steel have?: Aju Steel has 1 buy-side and 5 sell-side disclosures on record, covering ₩26M ($18K) in total reported value, spanning 2024-08-07 to 2026-06-11.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.