StockDriftsStockDriftsGST (083450) has 16 disclosed insider purchases and 31 disclosed disposals on record, filed by 16 distinct insiders. Together those filings cover ₩7.8B ($5.4M) in reported transaction value. The earliest filing StockDrifts holds for GST is dated 2020-01-03; the most recent is 2026-06-02. Across these filings the average return since disclosure is +24.55%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Position | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-08-18 | BUY | PROGRAM | 권준식 Junsik Kwon | Managing Director | 1.0K | ₩47,100 | -7.9% | ₩47M ($33K) |
| 2026-08-18 | BUY | PROGRAM | 최현석 Hyunseok Choi | Managing Director | 1.1K | ₩47,100 | -7.9% | ₩52M ($36K) |
| 2026-08-18 | BUY | PROGRAM | 최재혁 Jaehyuk Choi | Managing Director | 1.0K | ₩47,100 | -7.9% | ₩47M ($33K) |
| 2026-08-18 | BUY | PROGRAM | 최윤경 Choi Yun-kyung | Managing Director | 1.1K | ₩47,100 | -7.9% | ₩52M ($36K) |
| 2026-08-18 | BUY | PROGRAM | 장순기 Soonki Jang | Managing Director | 1.1K | ₩47,100 | -7.9% | ₩52M ($36K) |
| 2026-08-18 | BUY | PROGRAM | 박상규 Park Sang-gyu | moving | 900 | ₩47,100 | -7.9% | ₩42M ($29K) |
| 2026-07-22 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 100 | ₩42,350 | -5.2% | ₩4M ($3K) |
| 2026-07-20 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 100 | ₩43,200 | -7.1% | ₩4M ($3K) |
| 2026-07-15 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 800 | ₩48,350 | -11.4% | ₩36M ($25K) |
| 2026-06-02 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 400 | ₩48,200 | +7.3% | ₩19M ($13K) |
| 2026-05-21 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 600 | ₩57,500 | -10.1% | ₩35M ($24K) |
| 2026-05-19 | BUY | Market Buy | 이순창 Soonchang Lee | Outside Director | 330 | - | - | - |
| 2026-04-01 | SELL | Market Sell | 최재혁 Jaehyuk Choi | Managing Director | -40 | ₩27,250 | -59.3% | ₩2M ($1K) |
| 2026-04-01 | BUY | Market Buy | 문승보 Seungbo Moon | CEO | 640 | ₩27,250 | +56.5% | ₩17M ($12K) |
| 2026-03-27 | BUY | 주식매수청구권 행사 | 박재석 Jaeseok Park | Managing Director | 3.0K | ₩27,050 | +57.7% | ₩81M ($56K) |
| 2026-03-25 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 2.0K | ₩29,700 | +43.6% | ₩59M ($41K) |
| 2026-02-27 | BUY | 계약중도해지 | 석종욱 Seok Jong-wook | CEO | 7.5K | ₩31,750 | -14.8% | ₩239M ($166K) |
| 2026-02-27 | SELL | 증여 | 김덕준 Deokjun Kim | Chairman | -20.0K | ₩31,750 | +14.8% | ₩635M ($441K) |
| 2026-01-06 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -91 | ₩32,050 | +15.6% | ₩3M ($2K) |
| 2026-01-01 | BUY | 신규보고 | 유병선 Yoo Byung-seon | moving | 104 | ₩30,400 | -11.0% | ₩3M ($2K) |
| 2025-12-29 | BUY | 기타 | 석종욱 Seok Jong-wook | CEO | 560 | ₩27,050 | +0.0% | ₩15M ($11K) |
| 2025-12-24 | BUY | 주식매수청구권 행사 | 박재석 Jaeseok Park | Managing Director | 3.0K | ₩27,050 | +0.0% | ₩81M ($56K) |
| 2025-12-23 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -6.7K | ₩29,300 | +7.7% | ₩197M ($137K) |
| 2025-12-19 | BUY | PROGRAM | 최윤경 Choi Yun-kyung | Managing Director | 106 | - | - | - |
| 2025-12-19 | BUY | PROGRAM | 권준식 Junsik Kwon | Managing Director | 42 | - | - | - |
| 2025-12-19 | BUY | PROGRAM | 박상규 Park Sang-gyu | moving | 94 | - | - | - |
| 2025-12-19 | BUY | PROGRAM | 장순기 Soonki Jang | Managing Director | 92 | - | - | - |
| 2025-12-19 | BUY | PROGRAM | 최재혁 Jaehyuk Choi | Managing Director | 40 | - | - | - |
| 2025-12-19 | BUY | PROGRAM | 최현석 Hyunseok Choi | Managing Director | 100 | - | - | - |
| 2025-12-09 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -219 | ₩25,500 | -6.1% | ₩6M ($4K) |
| 2025-12-08 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -80 | ₩25,700 | -5.3% | ₩2M ($1K) |
| 2025-12-06 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -400 | ₩25,700 | -5.3% | ₩10M ($7K) |
| 2025-12-05 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -1.2K | ₩25,850 | -4.6% | ₩31M ($22K) |
| 2025-12-03 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -800 | ₩26,400 | -2.5% | ₩21M ($15K) |
| 2025-12-02 | SELL | Market Sell | 김주영 Jooyoung Kim | moving | -1.0K | ₩25,850 | -4.6% | ₩26M ($18K) |
| 2025-11-26 | BUY | 주식매수청구권 행사 | 김주영 Jooyoung Kim | moving | 8.0K | ₩25,350 | +6.7% | ₩203M ($141K) |
| 2025-11-25 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 2.0K | ₩25,150 | +7.5% | ₩50M ($35K) |
| 2025-11-25 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 2.0K | ₩25,150 | +7.5% | ₩50M ($35K) |
| 2025-11-07 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -560 | ₩26,700 | -1.3% | ₩15M ($10K) |
| 2025-11-07 | BUY | 기타 | 석종욱 Seok Jong-wook | CEO | 7 | ₩26,700 | +1.3% | ₩187K ($130) |
| 2025-11-06 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -506 | ₩27,950 | +3.2% | ₩14M ($10K) |
| 2025-11-05 | SELL | Market Sell | 장순기 Soonki Jang | Managing Director | -4.0K | ₩26,600 | -1.7% | ₩106M ($74K) |
| 2025-10-29 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -200 | ₩25,550 | -5.9% | ₩5M ($4K) |
| 2025-10-24 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 1.0K | ₩25,150 | +7.5% | ₩25M ($17K) |
| 2025-10-24 | SELL | 대여 | 석종욱 Seok Jong-wook | CEO | -18 | ₩25,150 | -7.5% | ₩453K ($314) |
| 2025-10-22 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 2.0K | ₩24,250 | +11.6% | ₩49M ($34K) |
| 2025-10-15 | SELL | Market Sell | 장순기 Soonki Jang | Managing Director | -4.0K | ₩26,000 | -4.0% | ₩104M ($72K) |
| 2025-10-02 | BUY | Market Buy | 문승보 Seungbo Moon | CEO | 860 | ₩24,550 | +10.2% | ₩21M ($15K) |
| 2025-09-11 | SELL | Market Sell | 석종욱 Seok Jong-wook | CEO | -1.7K | ₩21,450 | -26.1% | ₩37M ($26K) |
| 2025-08-22 | BUY | Market Buy | 석종욱 Seok Jong-wook | CEO | 3.7K | ₩18,320 | +47.6% | ₩68M ($48K) |
Showing the 50 most recent of 106 filings.
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.