Who has been buying CHA Biotech stock?

5 distinct insiders have filed 1 disclosed insider purchases in CHA Biotech (085660), most recently on 2026-06-25. 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 CHA Biotech have?

CHA Biotech has 1 buy-side and 5 sell-side disclosures on record, covering ₩216M ($150K) in total reported value, spanning 2025-04-22 to 2026-06-25.

Where does StockDrifts get CHA Biotech 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.

CHA Biotech 085660

Company

차바이오텍CHA Biotech

Insiders

Buys

Total Value

₩216M ($150K)

Avg Return

+16.40%

Last Filing

2026-06-25

CHA Biotech (085660) has 1 disclosed insider purchases and 5 disclosed disposals on record, filed by 5 distinct insiders. Together those filings cover ₩216M ($150K) in reported transaction value. The earliest filing StockDrifts holds for CHA Biotech is dated 2025-04-22; the most recent is 2026-06-25. 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 +16.40%, 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
2026-06-25	SELL	Market Sell	윤보현 Bohyun Yoon	Managing Director	-1.0K	₩10,930	+4.3%	₩11M ($8K)
2026-06-04	SELL	Market Sell	장경호 Jang Kyung-ho	Managing Director	-500	₩12,830	+5.0%	₩6M ($4K)
2026-05-01	BUY	신규선임	고정재 fixing material	torture	12.5K	₩16,900	-19.7%	₩211M ($147K)
2026-03-31	BUY	주식매수선택권	양은영 Eunyoung Yang	vice president	10.0K	₩17,350	+2.6%	₩174M ($120K)
2026-03-30	SELL	Market Sell	양은영 Eunyoung Yang	vice president	-2.0K	₩18,400	+3.3%	₩37M ($26K)
2026-03-27	SELL	Market Sell	양은영 Eunyoung Yang	vice president	-4.1K	₩19,680	+0.0%	₩81M ($56K)
2026-02-05	SELL	Market Sell	민영선 Min Young-seon	vice president	-2.8K	₩21,550	+1.4%	₩59M ($41K)
2025-07-28	BUY	신규선임	고경아 Go Kyeong-ah	Assistant Managing Director	7.9K	₩11,260	+88.7%	₩89M ($62K)
2025-07-22	BUY	Market Buy	전태준 Taejun Jeon	Outside Director	1.9K	₩11,520	+84.5%	₩21M ($15K)
2025-06-16	SELL	기타	정재석 Jaeseok Jeong	Managing Director	-341	₩10,680	-99.0%	₩4M ($3K)
2025-06-16	SELL	기타	양승호 Seungho Yang	Managing Director	-341	₩10,680	-99.0%	₩4M ($3K)
2025-06-16	SELL	기타	민영선 Min Young-seon	vice president	-683	₩10,680	-99.0%	₩7M ($5K)
2025-06-16	SELL	기타	윤보현 Bohyun Yoon	Managing Director	-5.3K	₩10,680	-99.0%	₩57M ($40K)
2025-06-16	SELL	기타	이상규 Lee Sang-gyu	Internal director	-5.5K	₩10,680	-99.0%	₩59M ($41K)
2025-06-16	SELL	기타	양은영 Eunyoung Yang	vice president	-3.7K	₩10,680	-99.0%	₩39M ($27K)
2025-06-16	SELL	기타	박윤상 Park Yun-sang	Internal director	-5.5K	₩10,680	-99.0%	₩59M ($41K)
2025-06-16	SELL	기타	남수연 Sooyeon Nam	president	-30.0K	₩10,680	-99.0%	₩320M ($223K)
2025-06-16	SELL	기타	케이에이치그린 KH Green	-	-2.8M	₩10,680	-99.0%	₩30.4B ($21.1M)
2025-06-16	SELL	기타	이동준 Lee Dongjun	vice president	-5.7K	₩10,680	-99.0%	₩61M ($42K)
2025-06-16	SELL	기타	차광렬 Cha Gwang-ryeol	-	-622.4K	₩10,680	-99.0%	₩6.6B ($4.6M)
2025-06-16	SELL	기타	한기원 Korea Kiwon	president	-15.0K	₩10,680	-99.0%	₩160M ($111K)
2025-06-16	SELL	기타	나혜정 Na Hye-jeong	Managing Director	-2.2K	₩10,680	-99.0%	₩23M ($16K)
2025-06-16	SELL	기타	김민우 Minwoo Kim	Managing Director	-2.0K	₩10,680	-99.0%	₩21M ($15K)
2025-06-16	SELL	기타	이영진 Youngjin Lee	Managing Director	-2.0K	₩10,680	-99.0%	₩21M ($15K)
2025-06-16	SELL	기타	박번 Park number	president	-15.0K	₩10,680	-99.0%	₩160M ($111K)
2025-06-16	SELL	기타	최석윤 Choi Seok-yoon	Internal director (CEO)	-40.0K	₩10,680	-99.0%	₩427M ($297K)
2025-06-16	SELL	기타	홍연주 Yeonju Hong	Managing Director	-8.0K	₩10,680	-99.0%	₩85M ($59K)
2025-06-16	SELL	기타	배동구 Baedong-gu	Managing Director	-2.0K	₩10,680	-99.0%	₩21M ($15K)
2025-06-16	SELL	기타	강재선 Kang Jae-seon	Managing Director	-1.2K	₩10,680	-99.0%	₩13M ($9K)
2025-06-16	SELL	기타	장경호 Jang Kyung-ho	Managing Director	-500	₩10,680	-99.0%	₩5M ($4K)
2025-06-16	BUY	PROGRAM	장경호 Jang Kyung-ho	Managing Director	500	₩10,680	+99.0%	₩5M ($4K)
2025-06-16	BUY	PROGRAM	나혜정 Na Hye-jeong	Managing Director	2.2K	₩10,680	+99.0%	₩23M ($16K)
2025-06-16	BUY	PROGRAM	김민우 Minwoo Kim	Managing Director	2.0K	₩10,680	+99.0%	₩21M ($15K)
2025-06-16	BUY	PROGRAM	이영진 Youngjin Lee	Managing Director	2.0K	₩10,680	+99.0%	₩21M ($15K)
2025-06-16	BUY	PROGRAM	박번 Park number	president	16.7K	₩10,680	+99.0%	₩178M ($124K)
2025-06-16	BUY	PROGRAM	최석윤 Choi Seok-yoon	Internal director (CEO)	44.5K	₩10,680	+99.0%	₩475M ($330K)
2025-06-16	BUY	PROGRAM	홍연주 Yeonju Hong	Managing Director	8.0K	₩10,680	+99.0%	₩85M ($59K)
2025-06-16	BUY	PROGRAM	배동구 Baedong-gu	Managing Director	2.0K	₩10,680	+99.0%	₩21M ($15K)
2025-06-16	BUY	PROGRAM	강재선 Kang Jae-seon	Managing Director	1.3K	₩10,680	+99.0%	₩14M ($10K)
2025-06-16	BUY	PROGRAM	정재석 Jaeseok Jeong	Managing Director	379	₩10,680	+99.0%	₩4M ($3K)
2025-06-16	BUY	PROGRAM	양승호 Seungho Yang	Managing Director	379	₩10,680	+99.0%	₩4M ($3K)
2025-06-16	BUY	PROGRAM	민영선 Min Young-seon	vice president	759	₩10,680	+99.0%	₩8M ($6K)
2025-06-16	BUY	PROGRAM	윤보현 Bohyun Yoon	Managing Director	5.3K	₩10,680	+99.0%	₩57M ($40K)
2025-06-16	BUY	PROGRAM	이상규 Lee Sang-gyu	Internal director	6.1K	₩10,680	+99.0%	₩65M ($45K)
2025-06-16	BUY	PROGRAM	양은영 Eunyoung Yang	vice president	4.1K	₩10,680	+99.0%	₩44M ($30K)
2025-06-16	BUY	PROGRAM	한기원 Korea Kiwon	president	16.7K	₩10,680	+99.0%	₩178M ($124K)
2025-06-16	BUY	PROGRAM	박윤상 Park Yun-sang	Internal director	5.5K	₩10,680	+99.0%	₩59M ($41K)
2025-06-16	BUY	PROGRAM	남수연 Sooyeon Nam	president	33.4K	₩10,680	+99.0%	₩356M ($248K)
2025-06-16	BUY	PROGRAM	케이에이치그린 KH Green	-	3.1M	₩10,680	+99.0%	₩32.7B ($22.7M)
2025-06-16	BUY	PROGRAM	이동준 Lee Dongjun	vice president	5.7K	₩10,680	+99.0%	₩61M ($42K)

Showing the 50 most recent of 77 filings.

Frequently asked questions

Who has been buying CHA Biotech stock?: 5 distinct insiders have filed 1 disclosed insider purchases in CHA Biotech (085660), most recently on 2026-06-25. 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 CHA Biotech have?: CHA Biotech has 1 buy-side and 5 sell-side disclosures on record, covering ₩216M ($150K) in total reported value, spanning 2025-04-22 to 2026-06-25.
Where does StockDrifts get CHA Biotech 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 CHA Biotech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.