Who has been buying Osang Healthcare stock?

4 distinct insiders have filed 31 disclosed insider purchases in Osang Healthcare (036220), most recently on 2026-05-08. 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 Osang Healthcare have?

Osang Healthcare has 31 buy-side and 1 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2024-03-13 to 2026-05-08.

Where does StockDrifts get Osang Healthcare 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.

Osang Healthcare 036220

Company

오상헬스케어Osang Healthcare

Insiders

Buys

Total Value

₩2.3B ($1.6M)

Avg Return

-17.93%

Last Filing

2026-05-08

Osang Healthcare (036220) has 31 disclosed insider purchases and 1 disclosed disposals on record, filed by 4 distinct insiders. Together those filings cover ₩2.3B ($1.6M) in reported transaction value. The earliest filing StockDrifts holds for Osang Healthcare is dated 2024-03-13; the most recent is 2026-05-08. 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 -17.93%, 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
2026-05-08	BUY	자사주상여금	박미숙 Park Mi-sook	vice president	500	-	-	-
2026-05-08	BUY	자사주상여금	한정 limitation	moving	150	-	-	-
2026-04-01	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩8,830	+15.4%	₩883K ($613)
2026-01-12	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩11,000	-7.4%	₩1M ($764)
2026-01-06	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	200	₩11,530	-11.6%	₩2M ($2K)
2025-12-23	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	-	-	-
2025-12-22	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	400	-	-	-
2025-12-12	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩12,310	-9.4%	₩1M ($855)
2025-11-26	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩12,560	-11.2%	₩1M ($872)
2025-11-07	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩12,410	-10.2%	₩1M ($862)
2025-11-05	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩12,710	-12.3%	₩1M ($883)
2025-11-04	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩12,950	-13.9%	₩1M ($899)
2025-11-03	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	200	₩12,730	-12.4%	₩3M ($2K)
2025-10-28	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	100	₩13,680	-18.5%	₩1M ($950)
2025-05-28	SELL	Market Sell	김주형 Joohyung Kim	moving	-2.0K	₩19,900	+44.0%	₩40M ($28K)
2025-04-28	BUY	자사주상여금	손병창 Son Byeongchang	Managing Director	2.0K	₩13,470	-17.2%	₩27M ($19K)
2025-04-28	BUY	자사주상여금	박미숙 Park Mi-sook	Managing Director	500	₩13,470	-17.2%	₩7M ($5K)
2025-03-25	BUY	자사주상여금	김주형 Joohyung Kim	moving	2.0K	₩14,000	-20.4%	₩28M ($19K)
2025-03-25	BUY	주식매수선택권	김주형 Joohyung Kim	moving	10.0K	₩14,000	-20.4%	₩140M ($97K)
2025-02-17	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	5.0K	₩15,070	-26.0%	₩75M ($52K)
2025-02-14	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,090	-26.1%	₩151M ($105K)
2025-02-13	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,670	-28.8%	₩157M ($109K)
2025-02-12	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,870	-29.7%	₩159M ($110K)
2025-02-11	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,630	-28.7%	₩156M ($109K)
2025-02-10	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,640	-28.7%	₩156M ($109K)
2025-02-07	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,920	-30.0%	₩159M ($111K)
2025-02-06	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,570	-28.4%	₩156M ($108K)
2025-02-05	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	5.0K	₩15,550	-28.3%	₩78M ($54K)
2025-02-04	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	8.0K	₩15,490	-28.0%	₩124M ($86K)
2025-02-03	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,500	-28.1%	₩155M ($108K)
2025-01-31	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	11.4K	₩14,820	-24.8%	₩169M ($117K)
2025-01-24	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.6K	₩14,430	-22.7%	₩153M ($106K)
2025-01-24	BUY	Market Buy	이종민 Jongmin Lee	Outside Director	2.0K	₩14,430	-22.7%	₩29M ($20K)
2025-01-23	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,410	-27.6%	₩154M ($107K)
2025-01-22	BUY	Market Buy	오상자이엘 Oh Sangjaiel	-	10.0K	₩15,980	-30.2%	₩160M ($111K)
2024-09-27	BUY	자사주상여금	이의섭 Lee Eui-seop	vice president	1.0K	₩12,990	-14.2%	₩13M ($9K)
2024-09-27	BUY	자사주상여금	김주형 Joohyung Kim	moving	6.0K	₩12,990	-14.2%	₩78M ($54K)
2024-09-27	BUY	자사주상여금	손병창 Son Byeongchang	Managing Director	2.0K	₩12,990	-14.2%	₩27M ($18K)
2024-09-10	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	227	₩12,990	-14.2%	₩3M ($2K)
2024-09-09	BUY	Market Buy	강철훈 Kang Cheol-hoon	CEO/President	1.0K	₩13,090	-14.8%	₩13M ($9K)
2024-06-20	BUY	Market Buy	이종민 Jongmin Lee	Outside Director	2.0K	₩14,420	-22.7%	₩29M ($20K)
2024-03-29	BUY	신규선임	이종민 Jongmin Lee	Outside Director	3	₩19,970	-44.2%	₩60K ($42)
2024-03-26	BUY	주식매수선택권	홍승억 Seung-Eok Hong	CEO	40.0K	₩21,150	-47.3%	₩846M ($588K)
2024-03-26	BUY	주식매수선택권	이의섭 Lee Eui-seop	vice president	10.0K	₩21,150	-47.3%	₩212M ($147K)
2024-03-26	BUY	주식매수선택권	손병창 Son Byeongchang	Managing Director	10.0K	₩21,150	-47.3%	₩212M ($147K)
2024-03-26	BUY	주식매수선택권	김주형 Joohyung Kim	moving	5.0K	₩21,150	-47.3%	₩106M ($73K)
2024-03-13	BUY	PROGRAM	유병열 Yoo Byung-yeol	Internal director	50.0K	₩29,350	-62.0%	₩1.5B ($1.0M)
2024-03-13	BUY	PROGRAM	이동현 Donghyun Lee	Internal director	723.6K	₩29,350	-62.0%	₩21.2B ($14.7M)
2024-03-13	BUY	PROGRAM	이의섭 Lee Eui-seop	vice president	15.0K	₩29,350	-62.0%	₩440M ($306K)
2024-03-13	BUY	PROGRAM	홍승억 Seung-Eok Hong	CEO	50.0K	₩29,350	-62.0%	₩1.5B ($1.0M)

Showing the 50 most recent of 56 filings.

Frequently asked questions

Who has been buying Osang Healthcare stock?: 4 distinct insiders have filed 31 disclosed insider purchases in Osang Healthcare (036220), most recently on 2026-05-08. 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 Osang Healthcare have?: Osang Healthcare has 31 buy-side and 1 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2024-03-13 to 2026-05-08.
Where does StockDrifts get Osang Healthcare 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 Osang Healthcare. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.