Who has been buying Dongnam Synthesis stock?

1 distinct insiders have filed 0 disclosed insider purchases in Dongnam Synthesis (023450), most recently on 2025-12-29. 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 Dongnam Synthesis have?

Dongnam Synthesis has 0 buy-side and 48 sell-side disclosures on record, covering ₩980M ($681K) in total reported value, spanning 2024-06-13 to 2025-12-29.

Where does StockDrifts get Dongnam Synthesis 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.

Dongnam Synthesis 023450

Company

동남합성Dongnam Synthesis

Insiders

Buys

Total Value

₩980M ($681K)

Avg Return

+4.64%

Last Filing

2025-12-29

Dongnam Synthesis (023450) has 0 disclosed insider purchases and 48 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩980M ($681K) in reported transaction value. The earliest filing StockDrifts holds for Dongnam Synthesis is dated 2024-06-13; the most recent is 2025-12-29. 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 +4.64%, 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
2025-12-29	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-200	₩33,800	+5.8%	₩7M ($5K)
2025-12-26	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-600	₩34,050	+6.5%	₩20M ($14K)
2025-12-24	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.7K	₩34,300	+7.1%	₩58M ($40K)
2025-12-22	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-500	₩33,600	+5.2%	₩17M ($12K)
2025-12-18	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.7K	₩33,500	+4.9%	₩57M ($40K)
2025-12-17	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.0K	₩32,500	+2.0%	₩33M ($23K)
2025-12-16	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.4K	₩32,000	+0.5%	₩45M ($31K)
2025-12-15	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-3.4K	₩31,900	+0.2%	₩108M ($75K)
2025-12-12	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-900	₩31,500	-1.1%	₩28M ($20K)
2025-12-09	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.2K	₩30,400	-4.8%	₩36M ($25K)
2025-12-08	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-172	₩30,400	-4.8%	₩5M ($4K)
2025-12-05	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-840	₩30,050	-6.0%	₩25M ($18K)
2025-12-04	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-400	₩30,350	-4.9%	₩12M ($8K)
2025-09-12	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-500	₩31,950	+0.3%	₩16M ($11K)
2025-09-11	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-500	₩32,000	+0.5%	₩16M ($11K)
2025-07-21	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.0K	₩33,200	+4.1%	₩33M ($23K)
2025-07-18	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩33,550	+5.1%	₩10M ($7K)
2025-07-17	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩33,500	+4.9%	₩10M ($7K)
2025-07-16	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-499	₩33,800	+5.8%	₩17M ($12K)
2025-07-15	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-401	₩34,000	+6.3%	₩14M ($9K)
2025-07-14	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩34,150	+6.7%	₩10M ($7K)
2025-07-11	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩34,350	+7.3%	₩10M ($7K)
2025-07-10	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.0K	₩34,500	+7.7%	₩35M ($24K)
2025-07-09	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-1.1K	₩34,750	+8.3%	₩38M ($27K)
2025-07-08	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-800	₩34,850	+8.6%	₩28M ($19K)
2025-07-07	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩35,100	+9.3%	₩11M ($7K)
2025-07-04	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩35,000	+9.0%	₩11M ($7K)
2025-07-03	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-400	₩35,000	+9.0%	₩14M ($10K)
2025-07-01	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-292	₩34,250	+7.0%	₩10M ($7K)
2025-06-19	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-200	₩34,350	+7.3%	₩7M ($5K)
2025-06-18	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩34,400	+7.4%	₩10M ($7K)
2025-06-13	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-28	₩34,250	+7.0%	₩959K ($666)
2025-06-10	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-280	₩34,150	+6.7%	₩10M ($7K)
2025-06-09	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-700	₩34,150	+6.7%	₩24M ($17K)
2025-05-13	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-200	₩33,350	+4.5%	₩7M ($5K)
2025-04-30	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩33,700	+5.5%	₩10M ($7K)
2025-04-29	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-200	₩34,000	+6.3%	₩7M ($5K)
2025-04-28	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩34,000	+6.3%	₩10M ($7K)
2025-04-15	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-400	₩33,150	+3.9%	₩13M ($9K)
2025-03-25	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩33,600	+5.2%	₩10M ($7K)
2025-03-24	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-400	₩33,500	+4.9%	₩13M ($9K)
2025-03-19	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-300	₩34,050	+6.5%	₩10M ($7K)
2025-03-18	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-303	₩34,150	+6.7%	₩10M ($7K)
2025-03-17	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-290	₩34,000	+6.3%	₩10M ($7K)
2025-01-02	BUY	신규선임	정종현 Jonghyun Jeong	Treatment for directors	1.8K	₩32,050	-0.6%	₩56M ($39K)
2024-11-27	SELL	신고대량매매	김정돈 Kim Jeong-don	CEO	-7.4K	₩30,000	-6.2%	₩223M ($155K)
2024-11-27	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-778	₩30,000	-6.2%	₩23M ($16K)
2024-06-17	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-750	₩34,600	+8.0%	₩26M ($18K)
2024-06-14	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-750	₩35,050	+9.1%	₩26M ($18K)
2024-06-13	SELL	Market Sell	김정돈 Kim Jeong-don	CEO	-500	₩35,400	+10.0%	₩18M ($12K)

Frequently asked questions

Who has been buying Dongnam Synthesis stock?: 1 distinct insiders have filed 0 disclosed insider purchases in Dongnam Synthesis (023450), most recently on 2025-12-29. 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 Dongnam Synthesis have?: Dongnam Synthesis has 0 buy-side and 48 sell-side disclosures on record, covering ₩980M ($681K) in total reported value, spanning 2024-06-13 to 2025-12-29.
Where does StockDrifts get Dongnam Synthesis 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 Dongnam Synthesis. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.