| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Schlaefer John | President, CEO & Class III Dir, Director | C/O GCT SEMICONDUCTOR HOLDING, INC., 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE | /s/ Edmond Cheng, attorney-in-fact | 22 Sep 2025 | 0001542775 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | GCTS | Common Stock, par value $0.0001 per share | Award | $0 | +75,000 | +58.97% | $0 | 202,173 | 19 Sep 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Represents restricted stock units ("RSU"), which constitute a contingent right to receive one share of common stock, par value $0.0001 per share, of GCT Semiconductor Holding, Inc. The RSUs vest over four years in equal 25% installments on each anniversary of the September 19, 2025 grant date, commencing September 19, 2026, subject to the Reporting Person's continued service with the Issuer. |