Company: GCTS
Filing Date: 2025-05-16
Form Type: 424B5
Source: 0001104659-25-049833
Chunk: 18

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-05-16
Form: 424B5
Chunk 18
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us supplement modifies or supersedes
such prior statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a
part of this prospectus supplement.

We will provide to each person,
including any beneficial owner, to whom a prospectus supplement is delivered, upon written or oral request and without charge, a copy
of the documents referred to above that we have incorporated by reference into this prospectus supplement and a copy of the registration
statement of which this prospectus supplement is a part. You can request copies of such documents if you write us at our principal executive
offices at 2290 North 1st Street, Suite 201 San Jose, CA 95131, or call our telephone number at (408) 434-6040.

Exhibits to the documents
will not be sent, however, unless those exhibits have specifically been incorporated by reference into such document. You may also obtain
copies of our SEC filings statement as described above under the heading “Where You Can Find More Information.”

<div align='center'>S-13

$200,000,000

GCT Semiconductor Holding, Inc.

Common Stock

Preferred Stock

Debt Securities

Warrants

Rights

Units</div>

We, from time
to time, may offer and sell, in one or more offerings, up to $200,000,000 of any combination of shares of our common stock (“Common
Stock”), shares of our preferred stock, debt securities, warrants (“Warrants”), rights and units. We may offer and sell
these securities in amounts, at prices and on terms determined at the time of the offering.

This prospectus
describes the general terms of these securities and the general manner in which these securities will be offered. Each time securities
are offered under this prospectus, we will provide a prospectus supplement and attach it to this prospectus. The prospectus supplement
will contain more specific information about the terms of the offering and the offered securities and may also supplement, update or amend
information contained in this prospectus.

We may offer
and sell these securities to or through underwriters, dealers or agents, directly to purchasers or through a combination of these methods.
If we use underwriters, dealers or agents to sell these securities, we will name them and describe their compensation arrangements in
the prospectus supplement relating to such offering.

Our Common
Stock and Warrants are traded on the New York Stock Exchange under the symbols “GCTS