| Name | Relationship | Address | Signature | Signature date | CIK | 
|---|---|---|---|---|---|
| Shin Hyunsoo | Class II Director, Director | C/O GCT SEMICONDUCTOR HOLDING, INC., 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE | /s/ Edmond Cheng, attorney-in-fact | 2025-05-27 | 0002007757 | 
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GCTS | Common Stock | Purchase | $80.1K | +77K | +45.23% | $1.04 | 247K | May 23, 2025 | Direct |