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.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory 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. 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.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean regulatory filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.