Who has been buying Woojin I&S stock?

1 distinct insiders have filed 0 disclosed insider purchases in Woojin I&S (010400), most recently on 2026-03-10. 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 Woojin I&S have?

Woojin I&S has 0 buy-side and 1 sell-side disclosures on record, covering ₩40M ($27K) in total reported value, spanning 2025-04-15 to 2026-03-10.

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.

Woojin I&S 010400

Company

우진아이엔에스Woojin I&S

Insiders

Buys

Total Value

₩40M ($27K)

Avg Return

-51.75%

Last Filing

2026-03-10

Woojin I&S (010400) has 0 disclosed insider purchases and 1 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩40M ($27K) in reported transaction value. The earliest filing StockDrifts holds for Woojin I&S is dated 2025-04-15; the most recent is 2026-03-10. Across these filings the average return since disclosure is -51.75%, 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
2026-09-01	SELL	장외매도	홍경모 Hong Gyeong-mo	CEO	-75.0K	-	-	-
2026-03-10	BUY	기타	김현웅 Hyunwoong Kim	Managing Director	20.0K	-	-	-
2026-03-10	BUY	기타	임기연 Lim Ki-yeon	Managing Director	20.0K	-	-	-
2026-03-10	BUY	기타	오병선 Oh Byeong-seon	Managing Director	20.0K	-	-	-
2026-03-10	BUY	기타	이점식 Lee Jeong-sik	vice president	20.0K	-	-	-
2026-01-27	BUY	신규선임	황륜선 Hwang Ryun-seon	Assistant Managing Director	5.9K	₩4,045	-3.6%	₩24M ($17K)
2026-01-27	BUY	신규선임	박재근 Jaegeun Park	Assistant Managing Director	6.3K	₩4,045	-3.6%	₩26M ($18K)
2026-01-27	BUY	신규선임	이성규 Seonggyu Lee	Assistant Managing Director	3.2K	₩4,045	-3.6%	₩13M ($9K)
2026-01-27	BUY	신규선임	최재필 Jaepil Choi	Assistant Managing Director	6.0K	₩4,045	-3.6%	₩24M ($17K)
2026-01-27	BUY	신규선임	임세환 Lim Se-hwan	Assistant Managing Director	10.0K	₩4,045	-3.6%	₩40M ($28K)
2025-04-17	SELL	Market Sell	김종규 Kim Jong-gyu	Managing Director	-15.4K	₩2,570	-51.8%	₩40M ($27K)
2025-04-15	BUY	신규선임	정인영 Jeong In-young	moving	800	₩2,755	+41.6%	₩2M ($2K)
2025-04-15	BUY	신규선임	오세철 Oh Se-cheol	moving	7.8K	₩2,755	+41.6%	₩21M ($15K)

Frequently asked questions

Who has been buying Woojin I&S stock?: 1 distinct insiders have filed 0 disclosed insider purchases in Woojin I&S (010400), most recently on 2026-03-10. 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 Woojin I&S have?: Woojin I&S has 0 buy-side and 1 sell-side disclosures on record, covering ₩40M ($27K) in total reported value, spanning 2025-04-15 to 2026-03-10.
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.