Who has been buying YMT stock?

2 distinct insiders have filed 4 disclosed insider purchases in YMT (251370), most recently on 2026-04-10. 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 YMT have?

YMT has 4 buy-side and 0 sell-side disclosures on record, covering ₩627M ($436K) in total reported value, spanning 2018-01-19 to 2026-04-10.

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.

YMT 251370

Company

와이엠티YMT

Insiders

Buys

Total Value

₩627M ($436K)

Avg Return

+24.88%

Last Filing

2026-04-10

YMT (251370) has 4 disclosed insider purchases and 0 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩627M ($436K) in reported transaction value. The earliest filing StockDrifts holds for YMT is dated 2018-01-19; the most recent is 2026-04-10. Across these filings the average return since disclosure is +24.88%, 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
2026-06-30	BUY	Market Buy	이홍기 Hongki Lee	independent director	100	-	-	-
2026-06-29	BUY	Market Buy	이홍기 Hongki Lee	independent director	200	-	-	-
2026-06-10	BUY	Market Buy	이홍기 Hongki Lee	independent director	200	-	-	-
2026-06-05	BUY	Market Buy	이홍기 Hongki Lee	independent director	100	-	-	-
2026-04-10	BUY	자사주상여금	전성욱 Seongwook Jeon	CEO	5.6K	₩16,710	+1.7%	₩93M ($65K)
2026-04-10	BUY	자사주상여금	김균록 Gyunrok Kim	CEO	1.8K	₩16,710	+1.7%	₩29M ($20K)
2026-03-25	BUY	Market Buy	이홍기 Hongki Lee	independent director	100	₩14,610	-43.1%	₩1M ($850)
2026-03-23	BUY	Market Buy	이홍기 Hongki Lee	independent director	190	₩11,960	-30.5%	₩2M ($2K)
2025-04-04	BUY	신규보고	한영태 Youngtae Han	Part-time auditor	23.5K	₩8,550	+58.1%	₩201M ($140K)
2024-12-03	BUY	Market Buy	백성규 Seonggyu Baek	CEO	10.1K	₩10,910	+23.9%	₩110M ($77K)
2024-12-03	BUY	Market Buy	전성욱 Seongwook Jeon	CEO	8.0K	₩10,910	+23.9%	₩87M ($61K)
2024-11-29	BUY	Market Buy	전성욱 Seongwook Jeon	CEO	20.0K	₩10,800	+25.2%	₩216M ($150K)
2024-11-28	BUY	Market Buy	전성욱 Seongwook Jeon	CEO	20.0K	₩10,690	+26.5%	₩214M ($148K)
2024-03-20	SELL	시간외매매	전상욱 Jeon Sang-wook	Managing Director	-250.0K	₩11,810	-14.5%	₩3.0B ($2.1M)
2020-08-20	BUY	무상신주취득	전성욱 Seongwook Jeon	CEO	2.6M	₩18,500	-26.9%	₩47.4B ($32.9M)
2018-01-19	BUY	무상신주취득	전성욱 Seongwook Jeon	CEO	1.3M	₩17,025	-20.6%	₩21.8B ($15.1M)

Frequently asked questions

Who has been buying YMT stock?: 2 distinct insiders have filed 4 disclosed insider purchases in YMT (251370), most recently on 2026-04-10. 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 YMT have?: YMT has 4 buy-side and 0 sell-side disclosures on record, covering ₩627M ($436K) in total reported value, spanning 2018-01-19 to 2026-04-10.
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.