Who has been buying JI Tech stock?

3 distinct insiders have filed 7 disclosed insider purchases in JI Tech (417500), most recently on 2026-07-07. 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 JI Tech have?

JI Tech has 7 buy-side and 9 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2023-06-12 to 2026-07-07.

Where does StockDrifts get JI Tech 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.

JI Tech 417500

Company

제이아이테크JI Tech

Insiders

Buys

Total Value

₩2.3B ($1.6M)

Avg Return

+3.91%

Last Filing

2026-07-07

JI Tech (417500) has 7 disclosed insider purchases and 9 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩2.3B ($1.6M) in reported transaction value. The earliest filing StockDrifts holds for JI Tech is dated 2023-06-12; the most recent is 2026-07-07. 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 +3.91%, 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
2026-07-07	SELL	증여	함석헌 Seokheon Ham	CEO	-195.0K	₩3,140	-1.8%	₩612M ($425K)
2026-06-05	BUY	Market Buy	함석헌 Seokheon Ham	CEO	20.0K	₩3,180	+11.0%	₩64M ($44K)
2026-06-04	BUY	Market Buy	함석헌 Seokheon Ham	CEO	57.1K	₩3,365	+4.9%	₩192M ($133K)
2026-06-02	BUY	Market Buy	함석헌 Seokheon Ham	CEO	55.5K	₩3,350	+5.4%	₩186M ($129K)
2026-04-14	SELL	증여	이종근 Jong Geun Lee	Managing Director	-100.0K	₩4,865	+2.8%	₩487M ($338K)
2025-12-31	SELL	임원퇴임	이주영 Jooyoung Lee	Managing Director	-142.8K	₩3,330	-8.4%	₩475M ($330K)
2025-11-28	BUY	Market Buy	함석헌 Seokheon Ham	CEO	125.0K	₩3,230	+11.8%	₩404M ($280K)
2025-11-27	BUY	Market Buy	함석헌 Seokheon Ham	CEO	32.0K	₩3,175	+13.7%	₩102M ($71K)
2025-11-26	BUY	Market Buy	함석헌 Seokheon Ham	CEO	105.0K	₩3,155	+14.4%	₩331M ($230K)
2025-10-13	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-22.2K	₩3,495	-3.3%	₩78M ($54K)
2025-09-22	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-6.0K	₩3,335	-8.3%	₩20M ($14K)
2025-09-18	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-10.0K	₩3,350	-7.8%	₩34M ($23K)
2025-09-17	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-17.4K	₩3,250	-11.1%	₩57M ($39K)
2025-09-16	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-1.6K	₩3,330	-8.4%	₩5M ($4K)
2025-08-19	BUY	주식매수청구권 행사	이주영 Jooyoung Lee	Managing Director	200.0K	₩3,050	+18.4%	₩610M ($424K)
2025-01-08	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-33.9K	₩3,930	+8.1%	₩133M ($93K)
2024-09-03	SELL	임원퇴임	김형철 Kim Hyung-cheol	moving	-20.0K	₩3,635	+0.7%	₩73M ($50K)
2024-09-03	BUY	Market Buy	이주영 Jooyoung Lee	Managing Director	3.0K	₩3,635	-0.7%	₩11M ($8K)
2024-08-20	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-69.1K	₩3,985	+9.4%	₩275M ($191K)
2024-08-16	SELL	Market Sell	이주영 Jooyoung Lee	Managing Director	-100.0K	₩3,800	+5.0%	₩380M ($264K)
2024-08-06	BUY	주식매수청구권 행사	이주영 Jooyoung Lee	Managing Director	200.0K	₩3,525	+2.4%	₩705M ($490K)
2024-07-12	SELL	임원퇴임	박전희 Park Jeonhee	moving	-30.0K	₩4,040	+10.6%	₩121M ($84K)
2024-07-10	SELL	Market Sell	김형철 Kim Hyung-cheol	moving	-40	₩4,420	+18.3%	₩177K ($123)
2024-05-17	BUY	주식매수청구권 행사	김형철 Kim Hyung-cheol	moving	20.0K	₩4,725	-23.6%	₩95M ($66K)
2024-05-17	BUY	주식매수청구권 행사	박전희 Park Jeonhee	moving	10.0K	₩4,725	-23.6%	₩47M ($33K)
2023-12-01	BUY	신규선임	이종근 Jong Geun Lee	moving	170.0K	₩3,380	+6.8%	₩575M ($399K)
2023-06-12	BUY	기타	박전희 Park Jeonhee	moving	20.0K	₩5,310	-32.0%	₩106M ($74K)

Frequently asked questions

Who has been buying JI Tech stock?: 3 distinct insiders have filed 7 disclosed insider purchases in JI Tech (417500), most recently on 2026-07-07. 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 JI Tech have?: JI Tech has 7 buy-side and 9 sell-side disclosures on record, covering ₩2.3B ($1.6M) in total reported value, spanning 2023-06-12 to 2026-07-07.
Where does StockDrifts get JI Tech 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 JI Tech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.