Who has been buying Donga ST stock?

3 distinct insiders have filed 12 disclosed insider purchases in Donga ST (170900), most recently on 2026-03-26. 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 Donga ST have?

Donga ST has 12 buy-side and 0 sell-side disclosures on record, covering ₩94M ($65K) in total reported value, spanning 2024-03-26 to 2026-03-26.

Where does StockDrifts get Donga ST 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.

Donga ST 170900

Company

동아에스티Donga ST

Insiders

Buys

Total Value

₩94M ($65K)

Avg Return

+8.76%

Last Filing

2026-03-26

Donga ST (170900) has 12 disclosed insider purchases and 0 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩94M ($65K) in reported transaction value. The earliest filing StockDrifts holds for Donga ST is dated 2024-03-26; the most recent is 2026-03-26. 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 +8.76%, 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
2026-03-26	SELL	임원퇴임	김학준 Hakjun Kim	Outside Director	-384	₩43,900	-3.8%	₩17M ($12K)
2026-03-26	BUY	PROGRAM	김종덕 Jongdeok Kim	Assistant Managing Director	123	₩43,900	+3.8%	₩5M ($4K)
2026-03-26	BUY	PROGRAM	방미영 Miyoung Bang	Managing Director	79	₩43,900	+3.8%	₩3M ($2K)
2026-03-26	BUY	PROGRAM	성수기 peak season	Assistant Managing Director	22	₩43,900	+3.8%	₩966K ($671)
2026-03-26	BUY	PROGRAM	임진순 Im Jin-soon	Managing Director	124	₩43,900	+3.8%	₩5M ($4K)
2026-03-26	BUY	PROGRAM	정재훈 Jaehoon Jeong	CEO	22	₩43,900	+3.8%	₩966K ($671)
2026-03-26	BUY	PROGRAM	조상욱 Cho Sang-wook	Assistant Managing Director	50	₩43,900	+3.8%	₩2M ($2K)
2026-03-26	BUY	PROGRAM	최수원 Soowon Choi	Assistant Managing Director	75	₩43,900	+3.8%	₩3M ($2K)
2026-03-26	BUY	PROGRAM	최수원 Soowon Choi	Assistant Managing Director	7	₩43,900	+3.8%	₩307K ($213)
2026-03-26	BUY	PROGRAM	박창현 Park Changhyun	Assistant Managing Director	28	₩43,900	+3.8%	₩1M ($854)
2026-03-26	BUY	PROGRAM	정진석 Jeong Jin-seok	Assistant Managing Director	3	₩43,900	+3.8%	₩132K ($91)
2026-03-26	BUY	PROGRAM	최영진 Youngjin Choi	Assistant Managing Director	71	₩43,900	+3.8%	₩3M ($2K)
2026-03-26	BUY	PROGRAM	김윤경 Kim Yun-kyung	Managing Director	86	₩43,900	+3.8%	₩4M ($3K)
2026-03-26	BUY	PROGRAM	동아쏘시오홀딩스 Donga Socio Holdings	-	121.2K	₩43,900	+3.8%	₩5.3B ($3.7M)
2026-03-26	BUY	PROGRAM	강정석 Jeongseok Kang	Chairman	1.5K	₩43,900	+3.8%	₩66M ($46K)
2026-03-26	BUY	PROGRAM	김미경 Kim Mi-kyung	Managing Director	41	₩43,900	+3.8%	₩2M ($1K)
2026-03-26	SELL	임원퇴임	이대우 Daewoo Lee	(Australia Head of Corporation)	-254	₩43,900	-3.8%	₩11M ($8K)
2025-11-28	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	-	-	-
2025-11-04	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	40	₩50,100	+6.2%	₩2M ($1K)
2025-11-01	BUY	신규선임	정진석 Jeong Jin-seok	Assistant Managing Director	9	₩49,300	+7.9%	₩444K ($308)
2025-11-01	BUY	신규선임	최영진 Youngjin Choi	Assistant Managing Director	47	₩49,300	+7.9%	₩2M ($2K)
2025-10-31	SELL	임원퇴임	황병운 Hwang Byeong-un	Assistant Managing Director	-31	₩48,900	-8.8%	₩2M ($1K)
2025-10-31	SELL	임원퇴임	이건일 Lee Geon-il	Researcher	-62	₩48,900	-8.8%	₩3M ($2K)
2025-09-04	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩44,600	+19.3%	₩892K ($619)
2025-08-01	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩45,400	+17.2%	₩908K ($631)
2025-07-02	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩48,900	+8.8%	₩978K ($679)
2025-07-01	BUY	신규선임	성수기 peak season	Assistant Managing Director	306	₩48,150	+10.5%	₩15M ($10K)
2025-06-04	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩48,150	+10.5%	₩963K ($669)
2025-05-07	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩46,250	+15.0%	₩925K ($642)
2025-04-07	BUY	PROGRAM	김종덕 Jongdeok Kim	Assistant Managing Director	73	₩41,900	+27.0%	₩3M ($2K)
2025-03-31	BUY	PROGRAM	최수원 Soowon Choi	Assistant Managing Director	27	₩44,050	+20.8%	₩1M ($826)
2025-03-31	BUY	PROGRAM	박창현 Park Changhyun	Assistant Managing Director	10	₩44,050	+20.8%	₩441K ($306)
2025-03-31	BUY	PROGRAM	김윤경 Kim Yun-kyung	Managing Director	26	₩44,050	+20.8%	₩1M ($795)
2025-03-31	BUY	PROGRAM	동아쏘시오홀딩스 Donga Socio Holdings	-	47.5K	₩44,050	+20.8%	₩2.1B ($1.5M)
2025-03-31	BUY	PROGRAM	황병운 Hwang Byeong-un	Assistant Managing Director	19	₩44,050	+20.8%	₩837K ($581)
2025-03-31	BUY	PROGRAM	이대우 Daewoo Lee	(Australia Head of Corporation)	217	₩44,050	+20.8%	₩10M ($7K)
2025-03-31	BUY	PROGRAM	이대우 Daewoo Lee	(Australia Head of Corporation)	11	₩44,050	+20.8%	₩485K ($336)
2025-03-31	BUY	PROGRAM	김미경 Kim Mi-kyung	Managing Director	14	₩44,050	+20.8%	₩617K ($428)
2025-03-31	BUY	PROGRAM	이건일 Lee Geon-il	Researcher	35	₩44,050	+20.8%	₩2M ($1K)
2025-03-31	BUY	PROGRAM	최수원 Soowon Choi	Assistant Managing Director	3	₩44,050	+20.8%	₩132K ($92)
2025-03-31	BUY	PROGRAM	임진순 Im Jin-soon	Assistant Managing Director	43	₩44,050	+20.8%	₩2M ($1K)
2025-03-31	BUY	PROGRAM	조상욱 Cho Sang-wook	Assistant Managing Director	16	₩44,050	+20.8%	₩705K ($489)
2025-03-31	BUY	PROGRAM	정재훈 Jaehoon Jeong	CEO	8	₩44,050	+20.8%	₩352K ($245)
2025-03-31	BUY	주식배당	김학준 Hakjun Kim	Outside Director	4	₩44,050	+20.8%	₩176K ($122)
2025-03-31	BUY	PROGRAM	강정석 Jeongseok Kang	Chairman	586	₩44,050	+20.8%	₩26M ($18K)
2025-03-31	BUY	PROGRAM	방미영 Miyoung Bang	Managing Director	27	₩44,050	+20.8%	₩1M ($826)
2025-03-27	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	20	₩45,850	+16.0%	₩917K ($637)
2025-03-07	SELL	임원퇴임	유준수 Junsu Yoo	Managing Director	-3	₩45,905	-15.9%	₩138K ($96)
2025-03-05	BUY	Market Buy	김학준 Hakjun Kim	Outside Director	200	₩46,347	+14.8%	₩9M ($6K)
2024-12-03	BUY	Market Buy	이대우 Daewoo Lee	(Australia Head of Corporation)	16	₩60,128	-11.5%	₩962K ($668)

Showing the 50 most recent of 90 filings.

Frequently asked questions

Who has been buying Donga ST stock?: 3 distinct insiders have filed 12 disclosed insider purchases in Donga ST (170900), most recently on 2026-03-26. 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 Donga ST have?: Donga ST has 12 buy-side and 0 sell-side disclosures on record, covering ₩94M ($65K) in total reported value, spanning 2024-03-26 to 2026-03-26.
Where does StockDrifts get Donga ST 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 Donga ST. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.