Who has been buying coas stock?

1 distinct insiders have filed 0 disclosed insider purchases in coas (071950), most recently on 2025-09-15. 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 coas have?

coas has 0 buy-side and 1 sell-side disclosures on record, covering ₩24M ($16K) in total reported value, spanning 2024-09-09 to 2025-09-15.

Where does StockDrifts get coas 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.

coas 071950

Company

코아스coas

Insiders

Buys

Total Value

₩24M ($16K)

Avg Return

+55.54%

Last Filing

2025-09-15

coas (071950) has 0 disclosed insider purchases and 1 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩24M ($16K) in reported transaction value. The earliest filing StockDrifts holds for coas is dated 2024-09-09; the most recent is 2025-09-15. 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 +55.54%, 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
2025-09-15	BUY	기타	이원곤 Lee Won-gon	Outside Director	34.9K	₩6,550	-42.4%	₩229M ($159K)
2025-09-15	SELL	기타	노병구 Noh Byeong-gu	CEO	-46.6K	₩6,550	+42.4%	₩305M ($212K)
2025-09-15	BUY	기타	노병구 Noh Byeong-gu	CEO	46.6K	₩6,550	-42.4%	₩305M ($212K)
2025-09-15	SELL	기타	이원곤 Lee Won-gon	Outside Director	-34.9K	₩6,550	+42.4%	₩229M ($159K)
2025-09-12	SELL	기타	민경중 Min Kyung-jung	CEO	-46.6K	₩6,830	+44.8%	₩318M ($221K)
2025-09-12	BUY	기타	민경중 Min Kyung-jung	CEO	46.6K	₩6,830	-44.8%	₩318M ($221K)
2025-09-11	SELL	기타	백운 조합 baiyun combination	-	-698.8K	₩7,300	+48.4%	₩5.1B ($3.5M)
2025-09-11	SELL	기타	임병연 Lim Byeong-yeon	thanks	-34.9K	₩7,300	+48.4%	₩255M ($177K)
2025-09-11	BUY	기타	임병연 Lim Byeong-yeon	thanks	34.9K	₩7,300	-48.4%	₩255M ($177K)
2025-09-11	BUY	기타	임병연 Lim Byeong-yeon	thanks	34.9K	₩7,300	-48.4%	₩255M ($177K)
2025-09-11	BUY	장외매수	노병구 Noh Byeong-gu	CEO	46.6K	₩7,300	-48.4%	₩340M ($236K)
2025-09-11	BUY	기타	이원곤 Lee Won-gon	Outside Director	34.9K	₩7,300	-48.4%	₩255M ($177K)
2025-09-11	SELL	기타	백운 조합 baiyun combination	-	-1.6M	₩7,300	+48.4%	₩11.9B ($8.3M)
2025-09-11	BUY	장외매수	민경중 Min Kyung-jung	CEO	46.6K	₩7,300	-48.4%	₩340M ($236K)
2025-09-11	BUY	기타	백운 조합 baiyun combination	-	1.3M	₩7,300	-48.4%	₩9.5B ($6.6M)
2025-09-11	BUY	기타	백운 조합 baiyun combination	-	698.8K	₩7,300	-48.4%	₩5.1B ($3.5M)
2025-09-08	SELL	기타	백운 조합 baiyun combination	-	-54.7K	₩8,480	+55.5%	₩464M ($322K)
2025-09-08	BUY	기타	임병연 Lim Byeong-yeon	thanks	2.8K	₩8,480	-55.5%	₩24M ($16K)
2025-09-08	SELL	Market Sell	이원곤 Lee Won-gon	Outside Director	-2.8K	₩8,480	+55.5%	₩24M ($16K)
2025-09-08	BUY	기타	이원곤 Lee Won-gon	Outside Director	2.8K	₩8,480	-55.5%	₩24M ($16K)
2024-09-11	BUY	BW인수	백운 조합 baiyun combination	-	23.3M	₩11,110	-66.1%	₩258.8B ($179.7M)
2024-09-11	SELL	장외매도	노재근 Noh Jae-geun	CEO	-1.3M	₩11,110	+66.1%	₩14.4B ($10.0M)
2024-09-11	BUY	장외매수	백운 조합 baiyun combination	-	547.5K	₩11,110	-66.1%	₩6.1B ($4.2M)
2024-09-10	SELL	자본감소	백운 조합 baiyun combination	-	-492.7K	₩11,110	+66.1%	₩5.5B ($3.8M)
2024-09-10	SELL	자본감소	노병구 Noh Byeong-gu	vice president	-180.0K	₩11,110	+66.1%	₩2.0B ($1.4M)
2024-09-10	SELL	자본감소	백운 조합 baiyun combination	-	-21.0M	₩11,110	+66.1%	₩232.9B ($161.7M)
2024-09-09	BUY	신규선임	노병구 Noh Byeong-gu	vice president	200.0K	₩11,110	-66.1%	₩2.2B ($1.5M)

Frequently asked questions

Who has been buying coas stock?: 1 distinct insiders have filed 0 disclosed insider purchases in coas (071950), most recently on 2025-09-15. 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 coas have?: coas has 0 buy-side and 1 sell-side disclosures on record, covering ₩24M ($16K) in total reported value, spanning 2024-09-09 to 2025-09-15.
Where does StockDrifts get coas 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 coas. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.