Who has been buying Doinsis stock?

2 distinct insiders have filed 0 disclosed insider purchases in Doinsis (484120), most recently on 2026-04-01. 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 Doinsis have?

Doinsis has 0 buy-side and 21 sell-side disclosures on record, covering ₩190M ($132K) in total reported value, spanning 2025-07-23 to 2026-04-01.

Where does StockDrifts get Doinsis 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.

Doinsis 484120

Company

도우인시스Doinsis

Insiders

Buys

Total Value

₩190M ($132K)

Avg Return

+3.24%

Last Filing

2026-04-01

Doinsis (484120) has 0 disclosed insider purchases and 21 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩190M ($132K) in reported transaction value. The earliest filing StockDrifts holds for Doinsis is dated 2025-07-23; the most recent is 2026-04-01. 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 +3.24%, 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
2026-04-01	BUY	신규선임	최규호 Gyuho Choi	Management Support Director	200	₩19,550	+7.2%	₩4M ($3K)
2026-03-31	SELL	장외매도	에스브이아이씨55호신기술사업투자조합 SVIC 55 Hoshin Technology Business Investment Association	-	-484.7K	₩18,700	-12.0%	₩9.1B ($6.3M)
2026-02-12	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-1.0K	₩23,800	+1.3%	₩24M ($17K)
2026-02-11	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-262	₩24,100	+2.5%	₩6M ($4K)
2026-02-11	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-738	₩24,100	+2.5%	₩18M ($12K)
2026-02-03	SELL	Market Sell	송영남 Youngnam Song	committee member	-290	₩24,350	+3.5%	₩7M ($5K)
2026-02-03	SELL	Market Sell	송영남 Youngnam Song	committee member	-100	₩24,350	+3.5%	₩2M ($2K)
2026-02-03	SELL	Market Sell	송영남 Youngnam Song	committee member	-100	₩24,350	+3.5%	₩2M ($2K)
2026-02-03	SELL	Market Sell	송영남 Youngnam Song	committee member	-300	₩24,350	+3.5%	₩7M ($5K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-122	₩24,150	+2.7%	₩3M ($2K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-320	₩24,150	+2.7%	₩8M ($5K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-300	₩24,150	+2.7%	₩7M ($5K)
2026-01-30	SELL	Market Sell	송영남 Youngnam Song	committee member	-500	₩24,150	+2.7%	₩12M ($8K)
2026-01-29	SELL	Market Sell	송영남 Youngnam Song	committee member	-190	₩25,050	+6.2%	₩5M ($3K)
2026-01-28	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-300	₩25,200	+6.8%	₩8M ($5K)
2026-01-28	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-300	₩25,200	+6.8%	₩8M ($5K)
2026-01-27	SELL	Market Sell	차진규 Cha Jin-gyu	committee member	-10	₩23,800	+1.3%	₩238K ($165)
2026-01-08	BUY	주식매수청구권 행사	이형섭 Hyeongseop Lee	committee member	4.0K	₩23,400	+0.4%	₩94M ($65K)
2026-01-08	BUY	주식매수청구권 행사	차경용 Cha Kyung-yong	committee member	10.0K	₩23,400	+0.4%	₩234M ($163K)
2026-01-08	BUY	주식매수청구권 행사	차진규 Cha Jin-gyu	committee member	13.0K	₩23,400	+0.4%	₩304M ($211K)
2026-01-08	BUY	주식매수청구권 행사	송영남 Youngnam Song	committee member	10.0K	₩23,400	+0.4%	₩234M ($163K)
2025-12-05	BUY	주식매수청구권 행사	차경용 Cha Kyung-yong	committee member	10.0K	₩23,800	-1.3%	₩238M ($165K)
2025-12-05	BUY	주식매수청구권 행사	송영남 Youngnam Song	committee member	10.0K	₩23,800	-1.3%	₩238M ($165K)
2025-12-05	BUY	주식매수청구권 행사	차진규 Cha Jin-gyu	committee member	17.0K	₩23,800	-1.3%	₩405M ($281K)
2025-12-05	BUY	주식매수청구권 행사	이형섭 Hyeongseop Lee	committee member	12.0K	₩23,800	-1.3%	₩286M ($198K)
2025-12-05	BUY	주식매수청구권 행사	박찬주 Chanju Park	committee member	20.0K	₩23,800	-1.3%	₩476M ($331K)
2025-07-23	BUY	신규상장	스페이스프로 space pro	-	1.4M	₩44,350	-47.0%	₩64.2B ($44.6M)
2025-07-23	BUY	신규상장	김은숙 Kim Eun-sook	committee member	5.0K	₩44,350	-47.0%	₩222M ($154K)
2025-07-23	BUY	신규상장	뉴파워프라즈마 New Power Plasma	-	3.0M	₩44,350	-47.0%	₩131.7B ($91.5M)
2025-07-23	BUY	신규상장	에스브이아이씨55호신기술사업투자조합 SVIC 55 Hoshin Technology Business Investment Association	-	1.3M	₩44,350	-47.0%	₩56.5B ($39.2M)
2025-07-23	BUY	신규상장	엔피홀딩스 NP Holdings	-	831.9K	₩44,350	-47.0%	₩36.9B ($25.6M)
2025-07-23	BUY	신규상장	유암코젤코바제1호사모투자 Yuamkozelkova 1st private equity investment	-	1.4M	₩44,350	-47.0%	₩64.2B ($44.6M)

Frequently asked questions

Who has been buying Doinsis stock?: 2 distinct insiders have filed 0 disclosed insider purchases in Doinsis (484120), most recently on 2026-04-01. 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 Doinsis have?: Doinsis has 0 buy-side and 21 sell-side disclosures on record, covering ₩190M ($132K) in total reported value, spanning 2025-07-23 to 2026-04-01.
Where does StockDrifts get Doinsis 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 Doinsis. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.