Company: GCTS
Filing Date: 2025-04-01
Form Type: S-3
Source: 0000950170-25-048684
Chunk: 1

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-04-01
Form: S-3
Chunk 1
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 the Securities Act, check the following box. ¨ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or classes of additional securities pursuant to Rule 413(b) under the Securities Act, check the following box. ¨ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer | ☐ | Accelerated filer         | ☐ |
| Non-accelerated filer   | ☒ | Smaller reporting company | ☒ |
|                         |   | Emerging growth company   | ☒ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ¨ The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

<div align='center'>EXPLANATORY NOTE</div>

This registration statement contains two prospectuses:

a base prospectus, which covers the offering, issuance and sale by us of up to $200,000,000 in the aggregate of our common stock, preferred stock, debt securities, warrants, rights and/or units consisting of some or all of these securities; and

a sales agreement prospectus covering the offering, issuance and sale by us of up to a maximum aggregate offering price of $75,000,000 of shares of our common stock pursuant to an At Market Issuance Sales Agreement (“sales agreement”) dated April 1, 2025, with B. Riley Securities, Inc. and H.C. Wainwright & Co., LLC as sales agents.

The base prospectus immediately follows this explanatory note. The specific terms of any securities to be offered pursuant to the base prospect