Company: GCTS
Filing Date: 2025-03-26
Form Type: 424B3
Source: 0000929638-25-001281
Chunk: 127

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-03-26
Form: 424B3
Chunk 127
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   195 |     |   |    543 |
| Other         |     |              |     — |     |   |      2 |
| Total         |     | $            | 9,128 |     | $ | 16,028 |

Contract Assets and Liabilities Net revenues recognized during the years ended December 31, 2024 and 2023 for the amounts included in the contract liabilities balance at the beginning of the respective annual periods are less than $0.1 million and $0.7 million, respectively. The balances related to contract fulfillment were immaterial as of December 31, 2024 and 2023.

5. Fair Value of Measurements Recurring Fair Value Measurements

The following financial instruments are measured at fair value on a recurring basis (in thousands):

|                                |     | December 31, 2024 |   |     |         |   |     |         |       |     |       |       |
|:-------------------------------|:----|:------------------|:--|:----|:--------|:--|:----|:--------|------:|:----|:------|------:|
|                                |     | Level 1           |   |     | Level 2 |   |     | Level 3 |       |     | Total |       |
| Liabilities:                   |     |                   |   |     |         |   |     |         |       |     |       |       |
| Convertible promissory notes   |     | $                 | — |     | $       | — |     | $       | 4,947 |     | $     | 4,947 |
| Warrant liabilities            |     |                   | — |     |         | — |     |         | 3,750 |     |       | 3,750 |
| Common stock forward liability |     |                   | — |     |         | — |     |         |   315 |     |       |   315 |

61 GCT SEMICONDUCTOR HOLDING, INC. Notes to Consolidated Financial Statements

|                              |     | December 31, 2023 |   |     |         |   |     |         |        |     |       |        |
|:-----------------------------|:----|:------------------|:--|:----|:--------|:--|:----|:--------|-------:|:----|:------|-------:|
|                              |