12 insiders reported 68 Form 4 transactions for GCT Semiconductor Holding, Inc. (GCTS) over the past 18 months (most recent 2026-07-07). Recent activity: TUDER JEFFREY (Director) Buy 9,259 shares, Chan Nelson (Director) Buy 9,259 shares, Lee Kyeongho (Director) Buy 9,259 shares, Shin Hyunsoo (Director) Buy 9,259 shares, Barker Robert (Director) Buy 9,259 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-07 | TUDER JEFFREY | Director | Buy | 9,259 | $0 |
| 2026-07-02 | Chan Nelson | Director | Buy | 9,259 | $0 |
| 2026-07-02 | Lee Kyeongho | Director | Buy | 9,259 | $0 |
| 2026-07-02 | Shin Hyunsoo | Director | Buy | 9,259 | $0 |
| 2026-07-02 | Barker Robert | Director | Buy | 9,259 | $0 |
| 2026-07-02 | Chun Kukjin | Director | Buy | 9,259 | $0 |
| 2026-04-02 | Chan Nelson | Director | Buy | 24,122 | $0 |
| 2026-04-02 | Lee Kyeongho | Director | Buy | 24,122 | $0 |
| 2026-04-02 | TUDER JEFFREY | Director | Buy | 24,122 | $0 |
| 2026-04-02 | Shin Hyunsoo | Director | Buy | 24,122 | $0 |
| 2026-04-02 | Barker Robert | Director | Buy | 24,122 | $0 |
| 2026-04-02 | Chun Kukjin | Director | Buy | 24,122 | $0 |
| 2026-03-06 | Chun Kukjin | Director | Sell | 40,000 | $0 |
| 2026-01-05 | Chan Nelson | Director | Buy | 22,916 | $0 |
| 2026-01-05 | Shin Hyunsoo | Director | Buy | 22,916 | $0 |
| 2026-01-05 | Chun Kukjin | Director | Buy | 22,916 | $0 |
| 2026-01-05 | Barker Robert | Director | Buy | 22,916 | $0 |
| 2026-01-05 | Lee Kyeongho | Director | Buy | 22,916 | $0 |
| 2026-01-05 | TUDER JEFFREY | Director | Buy | 22,916 | $0 |
| 2025-11-28 | Shin Hyunsoo | Director | Buy | 16,725 | $21,408 |
| 2025-11-24 | Shin Hyunsoo | Director | Buy | 25,453 | $32,580 |
| 2025-11-24 | Shin Hyunsoo | Director | Buy | 3,180 | $4,070 |
| 2025-10-03 | TUDER JEFFREY | Director | Buy | 18,092 | $0 |
| 2025-10-02 | Lee Kyeongho | Director | Buy | 18,092 | $0 |
| 2025-10-02 | Chan Nelson | Director | Buy | 18,092 | $0 |
Source: SEC Form 4 filings · as of 2026-07-07