Company: GCTS
Filing Date: 2025-04-01
Form Type: S-3
Source: 0000950170-25-048684
Chunk: 22

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-04-01
Form: S-3
Chunk 22
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 validity of the securities offered by this prospectus will be passed upon for us by Morgan, Lewis & Bockius LLP, Palo Alto, California, and for any underwriters or agents by counsel named in the applicable prospectus supplement.

### EXPERTS
The consolidated financial statements of the Company as of December 31, 2024 and 2023, and for each of the two years in the period ended December 31, 2024,incorporated in this registration statement by reference to the Annual Report on Form 10-K for the year ended December 31, 2024, have been so incorporated in reliance on the report (which contains an explanatory paragraph relating to the Company’s ability to continue as a going concern as described in Note 1 to the consolidated financial statements)of BPM LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

<div align='center'>17

$200,000,000

GCT Semiconductor Holding, Inc.

Common Stock

Preferred Stock

Debt Securities

Warrants

Rights

Units

Prospectus

_______, 2025</div>

You should rely only on the information contained or incorporated by reference in this prospectus. We have not authorized anyone to provide you with different information. You should not assume that the information contained or incorporated by reference in this prospectus is accurate as of any date other than the date of this prospectus. We are not making an offer of these securities in any state where the offer is not permitted.

The information in this preliminary prospectus is not complete and may be changed. These securities may not be sold until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

GCT Semiconductor Holding, Inc. Up to $75,000,000 of Common Stock We entered into an At Market Issuance Sales Agreement (the “sales agreement”) dated April 1, 2025, with B. Riley Securities, Inc. and H.C. Wainwright & Co., LLC (the “sales agents”), as our sales agents, relating to shares of our common stock, par value $0.0001 per share (“Common Stock”). In accordance with the terms of the sales agreement, we may offer and sell shares of our Common Stock having an aggregate offering price of up to $75