Who has been buying ASTECH stock?

7 distinct insiders have filed 77 disclosed insider purchases in ASTECH (453860), most recently on 2026-04-13. 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 ASTECH have?

ASTECH has 77 buy-side and 6 sell-side disclosures on record, covering ₩3.1B ($2.1M) in total reported value, spanning 2024-04-29 to 2026-04-13.

Where does StockDrifts get ASTECH 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.

ASTECH 453860

Company

에이에스텍ASTECH

Insiders

Buys

Total Value

₩3.1B ($2.1M)

Avg Return

-41.71%

Last Filing

2026-04-13

ASTECH (453860) has 77 disclosed insider purchases and 6 disclosed disposals on record, filed by 7 distinct insiders. Together those filings cover ₩3.1B ($2.1M) in reported transaction value. The earliest filing StockDrifts holds for ASTECH is dated 2024-04-29; the most recent is 2026-04-13. 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 -41.71%, 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
2026-04-13	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	123	₩13,730	+6.6%	₩2M ($1K)
2026-04-13	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	77	₩13,730	+6.6%	₩1M ($734)
2026-04-13	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	200	₩13,730	+6.6%	₩3M ($2K)
2026-04-13	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩13,730	+6.6%	₩1M ($953)
2026-04-10	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	300	₩13,690	+6.9%	₩4M ($3K)
2026-01-20	BUY	PROGRAM	박미정 Park Mi-jeong	moving	4.4K	₩16,240	-0.7%	₩71M ($49K)
2026-01-15	BUY	PROGRAM	이승훈 Seunghoon Lee	moving	205	₩15,950	+1.1%	₩3M ($2K)
2026-01-15	BUY	PROGRAM	김남철 Namcheol Kim	Managing Director	738	₩15,950	+1.1%	₩12M ($8K)
2026-01-15	BUY	PROGRAM	박원희 Wonhee Park	Managing Director	387	₩15,950	+1.1%	₩6M ($4K)
2026-01-15	BUY	PROGRAM	박태순 Park Tae-soon	moving	902	₩15,950	+1.1%	₩14M ($10K)
2026-01-15	BUY	PROGRAM	황재민 Jaemin Hwang	Managing Director	799	₩15,950	+1.1%	₩13M ($9K)
2026-01-15	BUY	PROGRAM	백현우 Hyunwoo Baek	Managing Director	688	₩15,950	+1.1%	₩11M ($8K)
2026-01-10	BUY	제3자배정유상증자	FirmenichTradingCorporationSA	-	787.2K	₩16,140	-0.1%	₩12.7B ($8.8M)
2025-12-01	BUY	Market Buy	이승훈 Seunghoon Lee	moving	50	₩15,070	+7.0%	₩754K ($523)
2025-10-21	BUY	Market Buy	이승훈 Seunghoon Lee	moving	70	₩16,340	-1.3%	₩1M ($794)
2025-10-13	BUY	Market Buy	이승훈 Seunghoon Lee	moving	100	₩17,380	-7.2%	₩2M ($1K)
2025-10-10	BUY	Market Buy	이승훈 Seunghoon Lee	moving	100	₩18,270	-11.7%	₩2M ($1K)
2025-05-13	BUY	Market Buy	윤명수 Myeongsu Yoon	thanks	1.0K	₩21,750	-25.8%	₩22M ($15K)
2025-02-27	SELL	주식매수청구권 행사	박종성 Park Jong-seong	-	-600.0K	₩20,450	+21.1%	₩12.3B ($8.5M)
2025-02-27	BUY	주식매수청구권 행사	윤종배 Jongbae Yoon	CEO	600.0K	₩20,450	-21.1%	₩12.3B ($8.5M)
2024-11-28	BUY	주식매수청구권 행사	윤종배 Jongbae Yoon	CEO	130.0K	₩19,700	-18.1%	₩2.6B ($1.8M)
2024-10-25	SELL	Market Sell	이영익 Youngik Lee	Managing Director	-2.5K	₩23,150	+30.3%	₩58M ($40K)
2024-10-24	SELL	Market Sell	이영익 Youngik Lee	Managing Director	-5.5K	₩23,300	+30.8%	₩128M ($89K)
2024-10-24	SELL	Market Sell	김남철 Namcheol Kim	moving	-4.0K	₩23,300	+30.8%	₩93M ($65K)
2024-10-23	SELL	Market Sell	이영익 Youngik Lee	Managing Director	-7.0K	₩23,650	+31.8%	₩166M ($115K)
2024-10-22	BUY	기타	김남철 Namcheol Kim	moving	10.0K	₩23,400	-31.1%	₩234M ($163K)
2024-10-21	BUY	기타	이영익 Youngik Lee	Managing Director	15.0K	₩24,450	-34.0%	₩367M ($255K)
2024-09-27	BUY	기타	박원희 Wonhee Park	moving	11.0K	₩28,550	-43.5%	₩314M ($218K)
2024-08-29	BUY	Market Buy	윤명수 Myeongsu Yoon	thanks	1.0K	₩24,650	-34.6%	₩25M ($17K)
2024-08-05	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	50	₩24,850	-35.1%	₩1M ($863)
2024-08-05	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	50	₩24,850	-35.1%	₩1M ($863)
2024-08-05	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩24,850	-35.1%	₩2M ($2K)
2024-08-02	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩28,100	-42.6%	₩3M ($2K)
2024-08-02	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩28,100	-42.6%	₩3M ($2K)
2024-08-02	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩28,100	-42.6%	₩3M ($2K)
2024-08-02	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩28,100	-42.6%	₩3M ($2K)
2024-08-02	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩28,100	-42.6%	₩3M ($2K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩35,700	-54.8%	₩4M ($2K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	50	₩35,700	-54.8%	₩2M ($1K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	50	₩35,700	-54.8%	₩2M ($1K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩35,700	-54.8%	₩4M ($2K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	100	₩35,700	-54.8%	₩4M ($2K)
2024-07-15	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	50	₩35,700	-54.8%	₩2M ($1K)
2024-07-12	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	14	₩36,300	-55.6%	₩508K ($353)
2024-07-12	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	20	₩36,300	-55.6%	₩726K ($504)
2024-07-12	BUY	Market Buy	정재경 Jaekyung Jeong	Outside Director	16	₩36,300	-55.6%	₩581K ($403)
2024-07-02	BUY	Market Buy	이승재 Seungjae Lee	CEO	100	₩36,300	-55.6%	₩4M ($3K)
2024-07-02	BUY	Market Buy	이승재 Seungjae Lee	CEO	100	₩36,300	-55.6%	₩4M ($3K)
2024-07-02	BUY	Market Buy	이승재 Seungjae Lee	CEO	100	₩36,300	-55.6%	₩4M ($3K)
2024-07-02	BUY	Market Buy	이승재 Seungjae Lee	CEO	300	₩36,300	-55.6%	₩11M ($8K)

Showing the 50 most recent of 98 filings.

Frequently asked questions

Who has been buying ASTECH stock?: 7 distinct insiders have filed 77 disclosed insider purchases in ASTECH (453860), most recently on 2026-04-13. 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 ASTECH have?: ASTECH has 77 buy-side and 6 sell-side disclosures on record, covering ₩3.1B ($2.1M) in total reported value, spanning 2024-04-29 to 2026-04-13.
Where does StockDrifts get ASTECH 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 ASTECH. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.