| Name | Relationship | Address | Signature | Signature date | CIK | 
|---|---|---|---|---|---|
| Shin Hyunsoo | Director, Class II Director | C/O GCT SEMICONDUCTOR HOLDING, INC., 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE | /s/ Edmond Cheng, attorney-in-fact | 2025-06-12 | 0002007757 | 
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GCTS | Common Stock | Purchase | $48K | +40K | +9.82% | $1.20 | 447K | Jun 10, 2025 | Direct | |
| transaction | GCTS | Common Stock | Purchase | $52.2K | +45K | +10.06% | $1.16 | 492K | Jun 10, 2025 | Direct |