StockDriftsStockDriftsJeju Semiconductor (080220) has 0 disclosed insider purchases and 1 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩422M ($293K) in reported transaction value. The earliest filing StockDrifts holds for Jeju Semiconductor is dated 2024-04-30; the most recent is 2026-05-15. 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 -6.99%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Position | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-05-15 | BUY | 기타 | 박성식 Seongsik Park | CEO | 32.9K | ₩82,300 | +33.3% | ₩2.7B ($1.9M) |
| 2026-05-15 | BUY | 기타 | 조형섭 Cho Hyeong-seop | CEO | 3.9K | ₩82,300 | +33.3% | ₩323M ($224K) |
| 2026-04-27 | BUY | 기타 | 조형섭 Cho Hyeong-seop | CEO | 12.5K | ₩58,400 | -7.7% | ₩731M ($508K) |
| 2026-04-27 | BUY | 기타 | 조형섭 Cho Hyeong-seop | CEO | 17.3K | ₩58,400 | -7.7% | ₩1.0B ($700K) |
| 2026-04-27 | BUY | 기타 | 박성식 Seongsik Park | CEO | 105.2K | ₩58,400 | -7.7% | ₩6.1B ($4.3M) |
| 2026-04-27 | BUY | 기타 | 박성식 Seongsik Park | CEO | 144.9K | ₩58,400 | -7.7% | ₩8.5B ($5.9M) |
| 2026-02-06 | SELL | Market Sell | 황주원 Hwang Joo-won | vice president | -10.0K | ₩42,200 | -7.0% | ₩422M ($293K) |
| 2025-11-17 | BUY | 신규선임 | 조형섭 Cho Hyeong-seop | moving | 424.7K | ₩19,720 | +129.0% | ₩8.4B ($5.8M) |
| 2024-04-30 | SELL | 증여 | 조형섭 Cho Hyeong-seop | CEO | -100.0K | ₩22,450 | -101.1% | ₩2.2B ($1.6M) |
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 Jeju Semiconductor. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.