Who has been buying Macrogen stock?

2 distinct insiders have filed 4 disclosed insider purchases in Macrogen (038290), most recently on 2025-12-31. 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 Macrogen have?

Macrogen has 4 buy-side and 1 sell-side disclosures on record, covering ₩55M ($38K) in total reported value, spanning 2023-08-30 to 2025-12-31.

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.

Macrogen 038290

Company

마크로젠Macrogen

Insiders

Buys

Total Value

₩55M ($38K)

Avg Return

+4.27%

Last Filing

2025-12-31

Macrogen (038290) has 4 disclosed insider purchases and 1 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩55M ($38K) in reported transaction value. The earliest filing StockDrifts holds for Macrogen is dated 2023-08-30; the most recent is 2025-12-31. Across these filings the average return since disclosure is +4.27%, 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
2025-12-31	SELL	임원퇴임	주창남 Changnam Joo	vice president	-10.0K	₩17,220	-7.4%	₩172M ($120K)
2025-04-04	BUY	Market Buy	김창훈 Kim Chang-hoon	CEO	1.1K	₩15,670	+18.1%	₩17M ($12K)
2025-01-31	SELL	임원퇴임	김종윤 Kim Jong-yoon	vice president	-2.2K	₩16,320	-13.4%	₩36M ($25K)
2025-01-17	BUY	신규보고	심성섭 Seongseop Shim	Managing Director	95	₩16,970	+9.0%	₩2M ($1K)
2025-01-17	BUY	신규보고	홍석주 Hong Seok-ju	Managing Director	20	₩16,970	+9.0%	₩339K ($236)
2025-01-14	BUY	신규보고	윤세웅 Sewoong Yoon	president	800	₩16,700	+10.8%	₩13M ($9K)
2024-12-31	SELL	임원퇴임	황상준 Sangjun Hwang	torture	-1.5K	₩16,350	-13.2%	₩25M ($17K)
2024-12-26	BUY	장외매수	서정선 Seo Jeong-seon	Chairman	862.3K	₩16,480	+12.3%	₩14.2B ($9.9M)
2024-08-08	BUY	Market Buy	김창훈 Kim Chang-hoon	CEO	1.7K	₩19,230	-3.8%	₩32M ($22K)
2023-11-23	SELL	Market Sell	황상준 Sangjun Hwang	torture	-230	₩21,700	+14.8%	₩5M ($3K)
2023-09-01	BUY	Market Buy	황상준 Sangjun Hwang	torture	2	₩19,080	-3.0%	₩38K ($27)
2023-08-30	BUY	Market Buy	황상준 Sangjun Hwang	torture	34	₩19,400	-4.6%	₩660K ($458)

Frequently asked questions

Who has been buying Macrogen stock?: 2 distinct insiders have filed 4 disclosed insider purchases in Macrogen (038290), most recently on 2025-12-31. 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 Macrogen have?: Macrogen has 4 buy-side and 1 sell-side disclosures on record, covering ₩55M ($38K) in total reported value, spanning 2023-08-30 to 2025-12-31.
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.