Company: GCTS
Filing Date: 2025-03-26
Form Type: 424B3
Source: 0000929638-25-001279
Chunk: 206

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-03-26
Form: 424B3
Chunk 206
---
. In addition, if you have any doubt as to whether you are in possession of material nonpublic information or whether a trade may otherwise violate this Policy, you should contact the foregoing person(s) before trading any securities of the Company.

Other Procedures.The Company may change these procedures or adopt such other procedures in the future as the Company considers appropriate or advisable in order to carry out the purposes of this Policy 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.This Policy is not intended to create any rights in third parties with respect to any violation of its terms and is also not 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 employees, officers and directors must certify their understanding of, and intent to comply with, this Policy. A copy of the certification that all employees (other than executive officers) must sign is attached to this Policy. Please return an executed copy of the attached certification immediately. Directors, executive officers and certain key employees are also subject to additional restrictions on their transactions in Company Securities, which are described in a separate Addendum to this Policy. Directors, executive officers and such key employees subject to the Addendum should sign the certification attached to that Addendum instead of the one attached hereto.

<div align='center'>8</div>

### CERTIFICATION
I hereby certify that:

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

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

3. 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 that I have the sole responsibility for compliance with the Policy. I further agree and represent that I will not trade in Company Securities while I am in possession of material non