Company: GCTS
Filing Date: 2025-03-26
Form Type: 424B3
Source: 0000929638-25-001281
Chunk: 204

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-03-26
Form: 424B3
Chunk 204
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 Chief Executive Officer at least five business days in advance of the proposed transaction, unless earlier notice is otherwise required by the Policy (e.g., one week for hedging transactions). The Chief Financial Officer or Chief Executive Officer is under no obligation to approve a trade submitted for pre-clearance, and may in their sole discretion, determine not to permit the trade. If a person seeks pre-clearance and permission to engage in the transaction is denied, then he or she should refrain from initiating any transaction in Company Securities, and should not inform any other person of the restriction. Transactions not effected within the time limit would be subject to pre-clearance again.

When a request for pre-clearance is made, the requestor should carefully consider whether he or she may be aware of any material nonpublic information about the Company, and should describe fully those circumstances to the Chief Financial Officer or Chief Executive Officer. In the event the requester is a director or an executive officer, the requestor should also indicate whether he or she has effected any non-exempt “opposite-way” transactions within the past six months, and should be prepared to report the proposed transaction on an appropriate Form 4 or Form 5. The requestor should also be prepared to comply with SEC Rule 144 and file a Form 144, if necessary, at the time of any sale. The person must also notify the Chief Financial Officer or Chief Executive Officer within two business days following completion of the transaction.

#### VI.
Broker Interface Procedures

In the event the Company becomes subject to Section 16 of the Exchange Act, the accelerated reporting obligations for Section 16 reports require tight interface with brokers handling transactions for our executives and directors. We require that you provide a copy of this Addendum to your broker and such broker must agree that he or she:

Will not enter any orders for you (except for orders under pre-approved Rule 10b5-1 plans) without first:

verifying with the Company that your transaction was pre-cleared; and

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complying with the brokerage firm’s compliance procedures (e.g., Rule 144).

Report any transactions immediately to the Chief Financial Officer or the Company’s legal counsel via:

telephone; and

in writing via e-mail describing the details of every transaction involving Company Securities, including gifts, transfers, pledges, and all 10b5-1 transactions.

#### VII.
Blackout Periods

(a)Quarterly Blackout Periods.The Company’s announcement of its quarterly financial results almost always has the