Company: GCTS
Filing Date: 2025-03-26
Form Type: 424B3
Source: 0000929638-25-001281
Chunk: 207

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-03-26
Form: 424B3
Chunk 207
---
 Addendum, you should contact the Company’s Chief Financial Officer or legal counsel before trading any securities of the Company.

Ultimately, however, the responsibility for adhering to the Policy and this Addendum and avoiding unlawful transactions rests with the individual director, officer and employee.

Other Procedures . The Company may change these procedures or adopt such other procedures in the future as the Company considers appropriate in order to carry out the purposes of the Policy and this Addendum or to comply with the federal securities laws. Wherever this Policy refers to, or calls for action by or involving the Company’s Chief Financial Officer, such reference shall include such other person as the Chief Financial Officer may designate from time to time, if the Chief Financial Officer is unavailable or otherwise unable to act for any reason.

No Third Party Rights . Neither the Policy nor this Addendum is intended to create any rights in third parties with respect to any violation of its terms and neither is intended to create any legal liability for the Company or any employee, officer or director beyond those for which they are already responsible under applicable securities laws.

Certifications . All directors, officers and employees subject to the procedures set forth in this Addendum must certify their understanding of, and intent to comply with, the Policy and this Addendum. Please return an executed copy of the attached certification immediately.

<div align='center'>12

CERTIFICATION(For Executive Officers, Directors and Certain Key Employees)</div>

I hereby certify that:

1. I have read and understand the Statement of Company Policy Regarding Insider Trading (the “Insider Trading Policy”) dated March 15, 2024 of GCT Semiconductor Holding, Inc.(the “Company”) and the Addendum to such policy dated March 15, 2024 (collectively, the “Insider Trading Policy”). I understand that the Chief Financial Officer and the legal counsel of the Company are available to answer any questions I have regarding the Insider Trading Policy.

2. I agree that I will comply with the Insider Trading Policy for as long as I am subject to such policy.

3.I understand that all of my trades must be preapproved by the Company’s Chief Financial Officer, Chief Executive Officer, or such other person as the Company may designate from time to time.

4. I agree that the Company may at any time and in its sole discretion issue a prohibition on trading in Company Securities, and that the Company shall have full power and authority to cancel any outstanding orders, including good until cancelled orders, that I may place, but I understand that I have the sole responsibility for