Company: GCTS
Filing Date: 2025-05-16
Form Type: 424B5
Source: 0001104659-25-049833
Chunk: 0

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-05-16
Form: 424B5
Chunk 0
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Filed Pursuant to Rule 424(b)(5)

Registration No. 333-286316

PROSPECTUS SUPPLEMENT
(to the prospectus dated April 9, 2025)

<div align='center'>GCT Semiconductor Holding, Inc.

7,006,370 Shares of Common Stock
Common Stock Purchase Warrants to Purchase up to 10,509,555 Shares of Common Stock

Up to 10,509,555 Shares of Common Stock Underlying the Common Stock Purchase Warrants</div>

We are offering 7,006,370 shares
(the “Shares”) of our common stock, par value $0.0001 per share (the “Common Stock”) and Common Stock Purchase
Warrants (the “Warrants”, together with the Shares, the “Securities) to purchase up to 10,509,555 shares of Common Stock
to certain institutional investors pursuant to this prospectus supplement and the accompanying prospectus (the “Offering”).
Each Share of Common Stock we sell in the Offering will be accompanied by a Warrant to purchase up to one and a half shares of Common
Stock. Each Warrant will have an exercise price of $1.71 per share, will be exercisable beginning six months from the issuance date and
will expire five years from the initial exercise date. Each Share of Common Stock and accompanying Warrant will be sold at a combined
purchase price of $1.57. The Shares of Common Stock and Warrants are immediately separable and will be issued separately but can only
be purchased together in this Offering. This prospectus supplement also relates to the offering of the Shares of Common Stock issuable
upon exercise of the Warrants sold in this Offering.

Our Common Stock is traded
on the New York Stock Exchange under the symbol “GCTS.” On May 14, 2025, the closing price of our Common Stock on the New
York Stock Exchange was $2.20 per share.

There is no established public
trading market for the Warrants, and we do not expect a market to develop. We do not intend to apply for listing of the Warrants on any
securities exchange or other nationally recognized trading system. Without an active trading market, the liquidity of the Warrants will
be limited.

We have retained Roth Capital
Partners, LLC (the “Placement Agent”) to act as our exclusive placement agent in connection with the Securities offered by
this prospectus supplement. The Placement Agent is not purchasing or selling any