| 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 | 2025-06-06 | 0002007757 | 
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GCTS | Common Stock | Purchase | $81.6K | +80K | +32.36% | $1.02 | 327K | Jun 4, 2025 | Direct | |
| transaction | GCTS | Common Stock | Purchase | $60.5K | +58.7K | +17.94% | $1.03 | 386K | Jun 5, 2025 | Direct | |
| transaction | GCTS | Common Stock | Purchase | $21.7K | +21.3K | +5.52% | $1.02 | 407K | Jun 5, 2025 | Direct |