Who has been buying Simmtech stock?

3 distinct insiders have filed 0 disclosed insider purchases in Simmtech (222800), most recently on 2026-07-01. 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 Simmtech have?

Simmtech has 0 buy-side and 4 sell-side disclosures on record, covering ₩760M ($527K) in total reported value, spanning 2024-06-27 to 2026-07-01.

Where does StockDrifts get Simmtech 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.

Simmtech 222800

Company

심텍Simmtech

Insiders

Buys

Total Value

₩760M ($527K)

Avg Return

-14.12%

Last Filing

2026-07-01

Simmtech (222800) has 0 disclosed insider purchases and 4 disclosed disposals on record, filed by 3 distinct insiders. Together those filings cover ₩760M ($527K) in reported transaction value. The earliest filing StockDrifts holds for Simmtech is dated 2024-06-27; the most recent is 2026-07-01. 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 -14.12%, 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
2026-07-01	SELL	기타	심텍홀딩스 Simmtech Holdings	-	-136.0K	₩157,300	+25.1%	₩21.4B ($14.9M)
2026-06-23	BUY	콜옵션권리행사에따른주식취득	심텍홀딩스 Simmtech Holdings	-	765.4K	-	-	-
2026-06-11	SELL	기타	심텍홀딩스 Simmtech Holdings	-	-84.3K	₩133,300	+6.8%	₩11.2B ($7.8M)
2026-05-22	SELL	기타	심텍홀딩스 Simmtech Holdings	-	-163.1K	₩131,800	+20.8%	₩21.5B ($14.9M)
2026-04-20	SELL	Market Sell	정창보 Changbo Jeong	vice president	-5.0K	₩78,300	-14.1%	₩392M ($272K)
2026-03-03	SELL	Market Sell	김중회 Kim Jung-hoe	Managing Director	-1.1K	-	-	-
2026-03-03	BUY	신규선임	송호건 Song Hogun	president	134	-	-	-
2026-01-01	BUY	신규선임	김범 Kim Beom	Managing Director	2.7K	₩50,800	+1.2%	₩135M ($94K)
2025-11-07	SELL	전환등	심텍홀딩스 Simmtech Holdings	-	-311.4K	₩61,900	+17.0%	₩19.3B ($13.4M)
2025-11-07	SELL	전환등	심텍홀딩스 Simmtech Holdings	-	-1.6M	₩61,900	+17.0%	₩96.4B ($66.9M)
2025-11-07	BUY	신주인수권사채의권리행사	심텍홀딩스 Simmtech Holdings	-	311.4K	₩61,900	-17.0%	₩19.3B ($13.4M)
2025-11-07	BUY	전환사채의권리행사	심텍홀딩스 Simmtech Holdings	-	1.6M	₩61,900	-17.0%	₩96.4B ($66.9M)
2025-10-31	SELL	Market Sell	정창보 Changbo Jeong	vice president	-5.0K	₩63,100	+18.5%	₩316M ($219K)
2025-09-12	BUY	전환사채의권리행사	심텍홀딩스 Simmtech Holdings	-	1.6M	₩29,150	+76.3%	₩45.4B ($31.5M)
2025-09-12	BUY	신주인수권사채의권리행사	심텍홀딩스 Simmtech Holdings	-	311.4K	₩29,150	+76.3%	₩9.1B ($6.3M)
2025-01-23	BUY	기타	이강혁 Kanghyuk Lee	Managing Director	1.0K	₩12,190	+321.7%	₩12M ($8K)
2025-01-02	BUY	신규보고	신현득 Hyeondeuk Shin	Managing Director	1.5K	₩10,920	+370.7%	₩16M ($11K)
2025-01-02	BUY	신규보고	김중회 Kim Jung-hoe	Managing Director	1.1K	₩10,920	+370.7%	₩12M ($8K)
2025-01-02	BUY	신규보고	박병희 Park Byeong-hee	Managing Director	921	₩10,920	+370.7%	₩10M ($7K)
2024-06-27	SELL	Market Sell	이용빈 Lee Yongbin	Managing Director	-1.5K	₩35,000	-46.9%	₩53M ($36K)

Frequently asked questions

Who has been buying Simmtech stock?: 3 distinct insiders have filed 0 disclosed insider purchases in Simmtech (222800), most recently on 2026-07-01. 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 Simmtech have?: Simmtech has 0 buy-side and 4 sell-side disclosures on record, covering ₩760M ($527K) in total reported value, spanning 2024-06-27 to 2026-07-01.
Where does StockDrifts get Simmtech 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 Simmtech. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.