Who has been buying J&TC stock?

3 distinct insiders have filed 9 disclosed insider purchases in J&TC (204270), most recently on 2025-04-14. 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 J&TC have?

J&TC has 9 buy-side and 1 sell-side disclosures on record, covering ₩1.2B ($855K) in total reported value, spanning 2024-02-13 to 2025-04-14.

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.

J&TC 204270

Company

제이앤티씨J&TC

Insiders

Buys

Total Value

₩1.2B ($855K)

Avg Return

+58.31%

Last Filing

2025-04-14

J&TC (204270) has 9 disclosed insider purchases and 1 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩1.2B ($855K) in reported transaction value. The earliest filing StockDrifts holds for J&TC is dated 2024-02-13; the most recent is 2025-04-14. Across these filings the average return since disclosure is +58.31%, 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
2025-04-14	BUY	Market Buy	장상욱 Sangwook Jang	Internal director	1.3K	₩14,770	+60.5%	₩19M ($13K)
2025-04-11	BUY	Market Buy	장상욱 Sangwook Jang	Internal director	10.7K	₩14,570	+62.7%	₩156M ($108K)
2025-04-09	BUY	Market Buy	장상욱 Sangwook Jang	Internal director	7.7K	₩12,450	+90.4%	₩95M ($66K)
2025-04-09	BUY	Market Buy	장윤정 Jang Yoon-jeong	CEO	2.7K	₩12,450	+90.4%	₩34M ($24K)
2025-04-09	BUY	Market Buy	장상욱 Sangwook Jang	Internal director	12.9K	₩12,450	+90.4%	₩161M ($112K)
2025-04-08	BUY	Market Buy	장윤정 Jang Yoon-jeong	CEO	12.9K	₩12,750	+85.9%	₩164M ($114K)
2025-04-08	BUY	Market Buy	장상욱 Sangwook Jang	Internal director	15.1K	₩12,750	+85.9%	₩193M ($134K)
2025-04-03	BUY	Market Buy	장윤정 Jang Yoon-jeong	CEO	16.9K	₩14,450	+64.0%	₩245M ($170K)
2025-04-02	BUY	Market Buy	장윤정 Jang Yoon-jeong	CEO	3.1K	₩15,100	+57.0%	₩47M ($33K)
2024-02-13	SELL	Market Sell	김윤택 Yuntaek Kim	CEO	-10.0K	₩11,630	-103.8%	₩116M ($81K)

Frequently asked questions

Who has been buying J&TC stock?: 3 distinct insiders have filed 9 disclosed insider purchases in J&TC (204270), most recently on 2025-04-14. 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 J&TC have?: J&TC has 9 buy-side and 1 sell-side disclosures on record, covering ₩1.2B ($855K) in total reported value, spanning 2024-02-13 to 2025-04-14.
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.