Who has been buying Laontech stock?

5 distinct insiders have filed 9 disclosed insider purchases in Laontech (418420), 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 Laontech have?

Laontech has 9 buy-side and 2 sell-side disclosures on record, covering ₩540M ($375K) in total reported value, spanning 2023-03-15 to 2026-06-11.

Where does StockDrifts get Laontech insider data?

From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.

Do insider buys in Korean stocks predict returns?

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

Laontech 418420

Company

라온텍Laontech

Insiders

Buys

Total Value

₩540M ($375K)

Avg Return

+119.37%

Last Filing

2026-06-11

Laontech (418420) has 9 disclosed insider purchases and 2 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩540M ($375K) in reported transaction value. The earliest filing StockDrifts holds for Laontech is dated 2023-03-15; the most recent is 2026-06-11. All of it is parsed from DART D001/D002 insider disclosures, the official disclosure system operated by the Financial Supervisory Service (Korea). Across these filings the average return since disclosure is +119.37%, 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	주식매수선택권	이광수 Lee Kwang-soo	Managing Director	17.5K	₩5,460	+0.7%	₩96M ($66K)
2026-06-11	BUY	주식매수선택권	김민석 Minseok Kim	Director of Research Institute	11.6K	₩5,460	+0.7%	₩63M ($44K)
2026-06-11	BUY	주식매수선택권	이정환 Jeonghwan Lee	Managing Director	3.0K	₩5,460	+0.7%	₩16M ($11K)
2026-06-11	BUY	주식매수선택권	한성준 Seongjun Han	Managing Director	10.0K	₩5,460	+0.7%	₩55M ($38K)
2026-05-12	SELL	증여	조성재 Seongjae Cho	vice president	-25.0K	₩9,440	+0.1%	₩236M ($164K)
2026-04-08	BUY	주식매수선택권	조성재 Seongjae Cho	vice president	8.8K	₩5,790	+36.3%	₩51M ($35K)
2026-04-08	BUY	주식매수선택권	조성재 Seongjae Cho	vice president	25.0K	₩5,790	+36.3%	₩145M ($101K)
2026-04-08	BUY	주식매수선택권	이정환 Jeonghwan Lee	Managing Director	7.5K	₩5,790	+36.3%	₩43M ($30K)
2026-04-08	BUY	주식매수선택권	이정환 Jeonghwan Lee	Managing Director	5.0K	₩5,790	+36.3%	₩29M ($20K)
2026-04-08	BUY	주식매수선택권	김민석 Minseok Kim	Director of Research Institute	8.8K	₩5,790	+36.3%	₩51M ($35K)
2026-04-08	BUY	주식매수선택권	한성준 Seongjun Han	Managing Director	7.5K	₩5,790	+36.3%	₩43M ($30K)
2026-04-08	BUY	주식매수선택권	김민석 Minseok Kim	Director of Research Institute	12.0K	₩5,790	+36.3%	₩69M ($48K)
2026-02-06	SELL	증여	조성재 Seongjae Cho	vice president	-35.0K	₩5,840	-14.2%	₩204M ($142K)
2026-02-05	SELL	Market Sell	정민수 Minsu Jeong	Director of Research Institute	-2.7K	₩6,200	-7.6%	₩17M ($12K)
2026-02-04	SELL	Market Sell	정민수 Minsu Jeong	Director of Research Institute	-70.3K	₩6,300	-5.9%	₩443M ($307K)
2025-12-03	BUY	Market Buy	이광수 Lee Kwang-soo	Managing Director	1.1K	₩4,930	+35.3%	₩5M ($4K)
2025-11-27	BUY	주식매수선택권	이광수 Lee Kwang-soo	Managing Director	8.8K	₩4,115	+62.1%	₩36M ($25K)
2025-11-27	BUY	주식매수선택권	정민수 Minsu Jeong	Director of Research Institute	17.5K	₩4,115	+62.1%	₩72M ($50K)
2025-11-27	BUY	주식매수선택권	한성준 Seongjun Han	Managing Director	5.0K	₩4,115	+62.1%	₩21M ($14K)
2025-11-27	BUY	주식매수선택권	한성준 Seongjun Han	Managing Director	10.0K	₩4,115	+62.1%	₩41M ($29K)
2025-11-27	BUY	주식매수선택권	김민석 Minseok Kim	Director of Research Institute	13.3K	₩4,115	+62.1%	₩55M ($38K)
2025-11-27	BUY	주식매수선택권	조성재 Seongjae Cho	Managing Director	8.8K	₩4,115	+62.1%	₩36M ($25K)
2025-10-15	SELL	증여	한성준 Seongjun Han	Managing Director	-100.0K	₩4,990	-33.7%	₩499M ($347K)
2025-09-29	SELL	증여	김민석 Minseok Kim	Director of Research Institute	-93.5K	₩4,810	-38.7%	₩450M ($312K)
2025-09-29	SELL	증여	이광수 Lee Kwang-soo	Managing Director	-100.0K	₩4,810	-38.7%	₩481M ($334K)
2025-04-10	BUY	주식매수선택권	김민석 Minseok Kim	Director of Research Institute	17.5K	₩2,455	+171.7%	₩43M ($30K)
2025-04-10	BUY	주식매수선택권	이정환 Jeonghwan Lee	Managing Director	15.0K	₩2,455	+171.7%	₩37M ($26K)
2025-04-10	BUY	주식매수선택권	조성재 Seongjae Cho	Managing Director	8.8K	₩2,455	+171.7%	₩21M ($15K)
2025-04-10	BUY	주식매수선택권	한성준 Seongjun Han	Managing Director	5.0K	₩2,455	+171.7%	₩12M ($9K)
2025-04-02	BUY	Market Buy	조성재 Seongjae Cho	Managing Director	3.9K	₩2,425	+175.1%	₩10M ($7K)
2025-03-27	BUY	Market Buy	김민석 Minseok Kim	Director of Research Institute	1.0K	₩2,535	+163.1%	₩3M ($2K)
2025-03-27	BUY	Market Buy	정민수 Minsu Jeong	Director of Research Institute	3.0K	₩2,535	+163.1%	₩8M ($5K)
2025-03-26	BUY	Market Buy	김민석 Minseok Kim	Director of Research Institute	3.0K	₩2,580	+158.5%	₩8M ($5K)
2025-03-26	BUY	Market Buy	정민수 Minsu Jeong	Director of Research Institute	3.7K	₩2,580	+158.5%	₩10M ($7K)
2025-03-26	BUY	Market Buy	이광수 Lee Kwang-soo	Managing Director	1.8K	₩2,580	+158.5%	₩5M ($3K)
2025-03-25	BUY	Market Buy	이광수 Lee Kwang-soo	Managing Director	3.7K	₩2,540	+162.6%	₩9M ($6K)
2025-03-24	BUY	Market Buy	한성준 Seongjun Han	Managing Director	9.2K	₩2,650	+151.7%	₩24M ($17K)
2024-09-05	BUY	장외매수	김보은 Boeun Kim	CEO	101.6K	₩3,640	+83.2%	₩370M ($257K)
2024-04-08	BUY	PROGRAM	이정환 Jeonghwan Lee	Managing Director	11.0K	₩5,870	+13.6%	₩65M ($45K)
2024-04-08	BUY	PROGRAM	이광수 Lee Kwang-soo	Managing Director	48.8K	₩5,870	+13.6%	₩286M ($199K)
2024-04-08	BUY	PROGRAM	김민석 Minseok Kim	Director of Research Institute	12.3K	₩5,870	+13.6%	₩72M ($50K)
2024-04-08	BUY	PROGRAM	이정환 Jeonghwan Lee	Managing Director	15.0K	₩5,870	+13.6%	₩88M ($61K)
2024-04-08	BUY	PROGRAM	한성준 Seongjun Han	Managing Director	15.0K	₩5,870	+13.6%	₩88M ($61K)
2024-04-08	BUY	PROGRAM	한성준 Seongjun Han	Managing Director	29.5K	₩5,870	+13.6%	₩173M ($120K)
2024-04-08	BUY	PROGRAM	정민수 Minsu Jeong	Director of Research Institute	43.8K	₩5,870	+13.6%	₩257M ($178K)
2024-04-08	BUY	PROGRAM	김민석 Minseok Kim	Director of Research Institute	31.8K	₩5,870	+13.6%	₩186M ($129K)
2024-03-13	BUY	신규선임	이정환 Jeonghwan Lee	Managing Director	5.5K	₩6,270	+6.4%	₩34M ($24K)
2023-03-15	BUY	PROGRAM	조성재 Seongjae Cho	Managing Director	43.8K	₩5,450	+22.4%	₩238M ($166K)

Frequently asked questions

Who has been buying Laontech stock?: 5 distinct insiders have filed 9 disclosed insider purchases in Laontech (418420), 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 Laontech have?: Laontech has 9 buy-side and 2 sell-side disclosures on record, covering ₩540M ($375K) in total reported value, spanning 2023-03-15 to 2026-06-11.
Where does StockDrifts get Laontech insider data?: From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Source filings

Every trade listed above is disclosed in DART D001/D002 insider disclosures, filed with the Financial Supervisory Service (Korea). View the original DART filings for Laontech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.