Who has been buying Koentech stock?

1 distinct insiders have filed 18 disclosed insider purchases in Koentech (029960), most recently on 2025-05-30. 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 Koentech have?

Koentech has 18 buy-side and 0 sell-side disclosures on record, covering ₩21.2B ($14.7M) in total reported value, spanning 2024-11-29 to 2025-05-30.

Where does StockDrifts get Koentech 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.

Koentech 029960

Company

코엔텍Koentech

Insiders

Buys

Total Value

₩21.2B ($14.7M)

Avg Return

-0.51%

Last Filing

2025-05-30

Koentech (029960) has 18 disclosed insider purchases and 0 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩21.2B ($14.7M) in reported transaction value. The earliest filing StockDrifts holds for Koentech is dated 2024-11-29; the most recent is 2025-05-30. 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 -0.51%, 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
2025-05-30	BUY	교환	이앤아이홀딩스 E&I Holdings	-	6.5M	₩8,940	+0.0%	₩57.8B ($40.2M)
2025-03-12	SELL	합병	블랙사파이어홀딩스 Black Sapphire Holdings	-	-12.5M	₩8,700	-2.8%	₩108.5B ($75.3M)
2025-03-12	BUY	합병	이앤아이홀딩스 E&I Holdings	-	12.5M	₩8,700	+2.8%	₩108.5B ($75.3M)
2025-01-09	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	28.3K	₩8,950	-0.1%	₩253M ($176K)
2025-01-08	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	47.8K	₩8,930	+0.1%	₩427M ($297K)
2025-01-07	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	59.4K	₩9,000	-0.7%	₩535M ($371K)
2025-01-06	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	57.0K	₩9,010	-0.8%	₩514M ($357K)
2025-01-03	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	121.2K	₩9,000	-0.7%	₩1.1B ($757K)
2025-01-02	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	220.1K	₩9,000	-0.7%	₩2.0B ($1.4M)
2024-12-27	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	8.9K	₩9,010	-0.8%	₩80M ($56K)
2024-12-26	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	27.1K	₩9,060	-1.3%	₩245M ($170K)
2024-12-24	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	112.6K	₩9,020	-0.9%	₩1.0B ($705K)
2024-12-17	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	31.4K	₩8,880	+0.7%	₩279M ($193K)
2024-12-16	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	80.2K	₩8,890	+0.6%	₩713M ($495K)
2024-12-13	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	66.7K	₩9,000	-0.7%	₩601M ($417K)
2024-12-12	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	67.8K	₩9,000	-0.7%	₩610M ($424K)
2024-12-11	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	137.7K	₩9,000	-0.7%	₩1.2B ($860K)
2024-12-10	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	70.7K	₩9,000	-0.7%	₩637M ($442K)
2024-12-09	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	52.6K	₩9,000	-0.7%	₩473M ($329K)
2024-12-06	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	274.9K	₩9,000	-0.7%	₩2.5B ($1.7M)
2024-12-05	BUY	Market Buy	블랙사파이어홀딩스 Black Sapphire Holdings	-	888.0K	₩9,000	-0.7%	₩8.0B ($5.5M)
2024-11-29	BUY	공개매수	블랙사파이어홀딩스 Black Sapphire Holdings	-	10.1M	₩8,870	+0.8%	₩89.7B ($62.3M)

Frequently asked questions

Who has been buying Koentech stock?: 1 distinct insiders have filed 18 disclosed insider purchases in Koentech (029960), most recently on 2025-05-30. 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 Koentech have?: Koentech has 18 buy-side and 0 sell-side disclosures on record, covering ₩21.2B ($14.7M) in total reported value, spanning 2024-11-29 to 2025-05-30.
Where does StockDrifts get Koentech 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 Koentech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.