Who has been buying ITM Semiconductor stock?

18 distinct insiders have filed 30 disclosed insider purchases in ITM Semiconductor (084850), most recently on 2026-06-30. 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 ITM Semiconductor have?

ITM Semiconductor has 30 buy-side and 3 sell-side disclosures on record, covering ₩260M ($180K) in total reported value, spanning 2012-12-12 to 2026-06-30.

Where does StockDrifts get ITM Semiconductor 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.

ITM Semiconductor 084850

Company

아이티엠반도체ITM Semiconductor

Insiders

Buys

Total Value

₩260M ($180K)

Avg Return

-14.60%

Last Filing

2026-06-30

ITM Semiconductor (084850) has 30 disclosed insider purchases and 3 disclosed disposals on record, filed by 18 distinct insiders. Together those filings cover ₩260M ($180K) in reported transaction value. The earliest filing StockDrifts holds for ITM Semiconductor is dated 2012-12-12; the most recent is 2026-06-30. 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 -14.60%, 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
2026-08-03	SELL	Market Sell	황호석 Hwang Hoseok	Head of Division/Managing Director	-4.0K	₩8,010	-5.7%	₩27M ($19K)
2026-07-30	SELL	Market Sell	황호석 Hwang Hoseok	Head of Division/Managing Director	-3.1K	₩7,180	-12.4%	₩23M ($16K)
2026-07-24	SELL	Market Sell	황호석 Hwang Hoseok	Head of Division/Managing Director	-1.3K	₩8,000	-0.9%	₩10M ($7K)
2026-06-30	SELL	장외매도	나혁휘 Na Hyuk-hwi	Hospital Director	-201.0K	₩9,950	+10.4%	₩2.0B ($1.4M)
2026-01-20	SELL	증여	윤석준 Seokjun Yoon	Managing Director	-3.6K	₩9,300	-34.1%	₩33M ($23K)
2026-01-13	SELL	Market Sell	황호석 Hwang Hoseok	Head of Division/Managing Director	-5.2K	₩9,080	-37.3%	₩47M ($33K)
2026-01-02	SELL	증여	정회원 regular member	Managing Director	-5.1K	₩9,880	-26.2%	₩50M ($35K)
2025-04-10	SELL	Market Sell	황호석 Hwang Hoseok	Head of Division/Managing Director	-3.4K	₩11,450	-8.9%	₩39M ($27K)
2025-01-14	SELL	시간외매매	서울전자통신 Seoul Electronic Communications	-	-164.0K	₩12,530	+0.5%	₩2.1B ($1.4M)
2025-01-03	SELL	시간외매매	황호석 Hwang Hoseok	Head of Division/Managing Director	-10.0K	₩12,930	+3.6%	₩129M ($90K)
2025-01-01	BUY	신규선임	유성진 Seongjin Yoo	Managing Director	100	₩12,410	+0.5%	₩1M ($862)
2025-01-01	BUY	신규선임	최윤조 Yoonjo Choi	Managing Director	7.1K	₩12,410	+0.5%	₩88M ($61K)
2025-01-01	BUY	신규선임	안상훈 Sang-Hoon Ahn	Managing Director	8.8K	₩12,410	+0.5%	₩109M ($76K)
2024-12-27	BUY	증여취소	황호석 Hwang Hoseok	Head of Division/Managing Director	1.6K	₩12,500	-0.2%	₩21M ($14K)
2024-12-17	SELL	증여	황호석 Hwang Hoseok	Head of Division/Managing Director	-2.2K	₩14,480	+13.9%	₩32M ($22K)
2024-12-13	SELL	시간외매매	나혁휘 Na Hyuk-hwi	Hospital Director	-130.0K	₩13,890	+10.2%	₩1.8B ($1.3M)
2024-12-12	BUY	Market Buy	정대규 Daegyu Jeong	Head of Division/Managing Director	715	₩13,780	-9.5%	₩10M ($7K)
2024-12-11	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	562	₩14,100	-11.6%	₩8M ($6K)
2024-12-10	BUY	Market Buy	윤석준 Seokjun Yoon	Managing Director	300	₩14,000	-10.9%	₩4M ($3K)
2024-12-10	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	73	₩14,000	-10.9%	₩1M ($710)
2024-12-09	BUY	Market Buy	윤석준 Seokjun Yoon	Managing Director	1.9K	₩13,570	-8.1%	₩26M ($18K)
2024-12-09	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	145	₩13,570	-8.1%	₩2M ($1K)
2024-12-09	BUY	Market Buy	백철승 Baek Cheol-seung	Managing Director	420	₩13,570	-8.1%	₩6M ($4K)
2024-12-06	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	440	₩14,300	-12.8%	₩6M ($4K)
2024-12-05	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	281	₩14,250	-12.5%	₩4M ($3K)
2024-12-04	BUY	Market Buy	정회원 regular member	Managing Director	108	₩14,160	-11.9%	₩2M ($1K)
2024-12-02	BUY	Market Buy	신순일 Shin Soon-il	Managing Director	97	₩14,690	-15.1%	₩1M ($990)
2024-11-29	BUY	Market Buy	정완교 Jeong Wan-kyo	Managing Director	323	₩15,010	-16.9%	₩5M ($3K)
2024-11-29	BUY	Market Buy	김상철 Kim Sang-cheol	Managing Director	201	₩15,010	-16.9%	₩3M ($2K)
2024-11-28	BUY	Market Buy	신순일 Shin Soon-il	Managing Director	203	₩15,360	-18.8%	₩3M ($2K)
2024-11-28	BUY	Market Buy	구자근 Koo Ja-geun	expert committee member	20	₩15,360	-18.8%	₩307K ($213)
2024-11-28	BUY	Market Buy	유재민 Jaemin Yoo	Managing Director	140	₩15,360	-18.8%	₩2M ($1K)
2024-11-28	BUY	Market Buy	박웅민 Woongmin Park	Managing Director	300	₩15,360	-18.8%	₩5M ($3K)
2024-11-27	BUY	Market Buy	김진홍 Jinhong Kim	expert committee member	326	₩15,200	-18.0%	₩5M ($3K)
2024-11-27	BUY	Market Buy	황보상직 Hwangbo Sangjik	Managing Director	394	₩15,200	-18.0%	₩6M ($4K)
2024-11-27	BUY	Market Buy	유재민 Jaemin Yoo	Managing Director	160	₩15,200	-18.0%	₩2M ($2K)
2024-11-27	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	310	₩15,200	-18.0%	₩5M ($3K)
2024-11-27	BUY	Market Buy	임상섭 Lim Sangseop	expert committee member	330	₩15,200	-18.0%	₩5M ($3K)
2024-11-27	BUY	Market Buy	구자근 Koo Ja-geun	expert committee member	180	₩15,200	-18.0%	₩3M ($2K)
2024-11-26	BUY	Market Buy	윤석준 Seokjun Yoon	Managing Director	1.4K	₩15,350	-18.8%	₩21M ($15K)
2024-11-25	BUY	Market Buy	이성희 Seonghee Lee	Managing Director	345	₩15,340	-18.7%	₩5M ($4K)
2024-11-25	BUY	Market Buy	인해진 Injinjin	Managing Director	345	₩15,340	-18.7%	₩5M ($4K)
2024-11-25	BUY	Market Buy	임강윤 Kangyoon Lim	Managing Director	345	₩15,340	-18.7%	₩5M ($4K)
2024-11-25	BUY	Market Buy	정대규 Daegyu Jeong	Head of Division/Managing Director	345	₩15,340	-18.7%	₩5M ($4K)
2024-11-25	BUY	Market Buy	김상엽 Kim Sang-yeop	Managing Director	4	₩15,340	-18.7%	₩61K ($43)
2024-08-12	SELL	시간외매매	황호석 Hwang Hoseok	Executive Director (Vice President)	-12.0K	₩17,390	+28.3%	₩209M ($145K)
2024-08-08	SELL	Market Sell	황호석 Hwang Hoseok	Executive Director (Vice President)	-1.0K	₩17,270	+27.8%	₩17M ($12K)
2024-08-06	BUY	차입	황호석 Hwang Hoseok	Executive Director (Vice President)	3.0K	₩17,240	-27.7%	₩52M ($36K)
2024-05-10	BUY	기타	유재민 Jaemin Yoo	Managing Director	1.5K	₩19,180	-35.0%	₩29M ($20K)
2024-05-10	BUY	기타	신순일 Shin Soon-il	Managing Director	1.6K	₩19,180	-35.0%	₩30M ($21K)

Showing the 50 most recent of 56 filings.

Frequently asked questions

Who has been buying ITM Semiconductor stock?: 18 distinct insiders have filed 30 disclosed insider purchases in ITM Semiconductor (084850), most recently on 2026-06-30. 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 ITM Semiconductor have?: ITM Semiconductor has 30 buy-side and 3 sell-side disclosures on record, covering ₩260M ($180K) in total reported value, spanning 2012-12-12 to 2026-06-30.
Where does StockDrifts get ITM Semiconductor 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 ITM Semiconductor. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.