Who has been buying Yuil Energy Tech stock?

5 distinct insiders have filed 0 disclosed insider purchases in Yuil Energy Tech (340930), most recently on 2026-05-31. 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 Yuil Energy Tech have?

Yuil Energy Tech has 0 buy-side and 13 sell-side disclosures on record, covering ₩7.1B ($4.9M) in total reported value, spanning 2024-05-07 to 2026-05-31.

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.

Yuil Energy Tech 340930

Company

유일에너테크Yuil Energy Tech

Insiders

Buys

Total Value

₩7.1B ($4.9M)

Avg Return

+15.77%

Last Filing

2026-05-31

Yuil Energy Tech (340930) has 0 disclosed insider purchases and 13 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩7.1B ($4.9M) in reported transaction value. The earliest filing StockDrifts holds for Yuil Energy Tech is dated 2024-05-07; the most recent is 2026-05-31. Across these filings the average return since disclosure is +15.77%, 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
2026-05-31	SELL	임원퇴임	이강수 Kangsu Lee	Managing Director	-23.4K	₩806	+0.0%	₩19M ($13K)
2026-03-31	SELL	특별관계해소	김병렬 Kim Byeong-ryeol	Managing Director	-2.9M	₩806	+0.0%	₩2.3B ($1.6M)
2026-03-18	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-1.2M	-	-	-
2026-02-26	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-1.2M	-	-	-
2026-02-20	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-1.2M	₩1,108	-9.1%	₩1.3B ($923K)
2026-02-20	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-1.2M	₩1,108	-9.1%	₩1.3B ($923K)
2026-02-13	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-1.2M	₩1,355	+10.8%	₩1.6B ($1.1M)
2026-01-29	BUY	무상신주취득	김병렬 Kim Byeong-ryeol	Managing Director	666.3K	₩1,550	-22.0%	₩1.0B ($717K)
2026-01-29	BUY	무상신주취득	이강수 Kangsu Lee	Managing Director	5.4K	₩1,550	-22.0%	₩8M ($6K)
2026-01-29	BUY	무상신주취득	정연길 Jeong Yeon-gil	CEO	4.4M	₩1,550	-22.0%	₩6.8B ($4.7M)
2025-12-30	SELL	기타	정연길 Jeong Yeon-gil	CEO	-2.1M	₩1,367	+11.6%	₩2.9B ($2.0M)
2025-12-30	BUY	유상신주취득	정연길 Jeong Yeon-gil	CEO	2.1M	₩1,367	-11.6%	₩2.9B ($2.0M)
2025-12-20	SELL	임원퇴임	이강윤 Lee Kang-yoon	moving	-729.0K	₩1,375	+12.1%	₩1.0B ($696K)
2025-12-20	SELL	임원퇴임	이강윤 Lee Kang-yoon	moving	-70.0K	₩1,375	+12.1%	₩96M ($67K)
2025-12-11	SELL	Market Sell	정연길 Jeong Yeon-gil	CEO	-280.0K	₩1,554	+22.2%	₩435M ($302K)
2025-12-10	SELL	Market Sell	정연길 Jeong Yeon-gil	CEO	-220.0K	₩1,592	+24.1%	₩350M ($243K)
2025-12-10	SELL	장외매도	정연길 Jeong Yeon-gil	CEO	-2.2M	₩1,592	+24.1%	₩3.5B ($2.4M)
2025-12-09	SELL	Market Sell	정연길 Jeong Yeon-gil	CEO	-334.3K	₩1,536	+21.3%	₩513M ($357K)
2025-12-08	SELL	Market Sell	정연길 Jeong Yeon-gil	CEO	-768.6K	₩1,692	+28.6%	₩1.3B ($903K)
2025-12-08	SELL	Market Sell	이강윤 Lee Kang-yoon	moving	-30.0K	₩1,692	+28.6%	₩51M ($35K)
2025-12-08	SELL	Market Sell	김병렬 Kim Byeong-ryeol	Managing Director	-275.6K	₩1,692	+28.6%	₩466M ($324K)
2025-12-08	SELL	Market Sell	이강수 Kangsu Lee	Managing Director	-9.9K	₩1,692	+28.6%	₩17M ($12K)
2025-12-05	SELL	Market Sell	정연길 Jeong Yeon-gil	CEO	-1.1M	₩1,666	+27.4%	₩1.8B ($1.2M)
2025-12-05	SELL	Market Sell	이강윤 Lee Kang-yoon	moving	-301.9K	₩1,666	+27.4%	₩503M ($349K)
2025-12-05	SELL	Market Sell	김병렬 Kim Byeong-ryeol	Managing Director	-948.8K	₩1,666	+27.4%	₩1.6B ($1.1M)
2025-11-26	BUY	기타	김병렬 Kim Byeong-ryeol	Managing Director	1.2M	₩1,429	-15.4%	₩1.7B ($1.2M)
2025-11-26	BUY	기타	이강수 Kangsu Lee	Managing Director	9.9K	₩1,429	-15.4%	₩14M ($10K)
2025-11-26	BUY	기타	이강윤 Lee Kang-yoon	moving	401.9K	₩1,429	-15.4%	₩574M ($399K)
2025-11-26	BUY	기타	정연길 Jeong Yeon-gil	CEO	7.0M	₩1,429	-15.4%	₩9.9B ($6.9M)
2025-10-31	SELL	임원퇴임	조희준 Heejun Cho	moving	-1.1M	₩1,669	+27.6%	₩1.9B ($1.3M)
2025-05-31	SELL	임원퇴임	전호춘 Jeon Ho-chun	vice president	-348.4K	₩1,006	-20.2%	₩350M ($243K)
2025-05-29	SELL	Market Sell	전호춘 Jeon Ho-chun	vice president	-29.4K	₩1,011	-19.6%	₩30M ($21K)
2025-05-28	SELL	Market Sell	전호춘 Jeon Ho-chun	vice president	-41.7K	₩1,041	-16.1%	₩43M ($30K)
2025-05-27	SELL	Market Sell	전호춘 Jeon Ho-chun	vice president	-533	₩980	-23.4%	₩522K ($363)
2024-10-17	BUY	기타	이강수 Kangsu Lee	Managing Director	909	₩1,612	-25.0%	₩1M ($1K)
2024-05-07	BUY	PROGRAM	정연길 Jeong Yeon-gil	Internal director	8.4M	₩2,617	-53.8%	₩22.0B ($15.3M)
2024-05-07	BUY	PROGRAM	김병렬 Kim Byeong-ryeol	Managing Director	1.5M	₩2,617	-53.8%	₩3.9B ($2.7M)
2024-05-07	BUY	PROGRAM	이강수 Kangsu Lee	Managing Director	11.4K	₩2,617	-53.8%	₩30M ($21K)
2024-05-07	BUY	PROGRAM	조희준 Heejun Cho	moving	752.0K	₩2,617	-53.8%	₩2.0B ($1.4M)
2024-05-07	BUY	PROGRAM	이강윤 Lee Kang-yoon	moving	486.0K	₩2,617	-53.8%	₩1.3B ($883K)
2024-05-07	BUY	PROGRAM	전호춘 Jeon Ho-chun	vice president	280.0K	₩2,617	-53.8%	₩733M ($509K)

Frequently asked questions

Who has been buying Yuil Energy Tech stock?: 5 distinct insiders have filed 0 disclosed insider purchases in Yuil Energy Tech (340930), most recently on 2026-05-31. 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 Yuil Energy Tech have?: Yuil Energy Tech has 0 buy-side and 13 sell-side disclosures on record, covering ₩7.1B ($4.9M) in total reported value, spanning 2024-05-07 to 2026-05-31.
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.