Company: GCTS
Filing Date: 2025-05-30
Form Type: S-3/A
Source: 0001104659-25-054969
Chunk: 0

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-05-30
Form: S-3/A
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on May 30, 2025</div>

Registration No. 333-286704

<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

AMENDMENT NO. 2

TO

FORM S-3

REGISTRATION STATEMENT

UNDER THE SECURITIES ACT OF 1933

GCT Semiconductor Holding, Inc.

(Exact name of registrant as specified in its charter)</div>

| Delaware                                                       | 86-2171699                             |
| (State or other jurisdiction of incorporation or organization) | -I.R.S. Employer Identification Number |

<div align='center'>2290 North 1st Street, Suite 201

San Jose, California 95131

(408) 434-6040

(Address, Including zip code, and telephone
number, including area code, of registrant’s principal executive offices)

John Schlaefer

Chief Executive Officer

GCT Semiconductor Holding, Inc.

2290 North 1st Street, Suite 201

San Jose, California 95131

(408) 434-6040

(Name, address, including zip code, and telephone
number, including area code, of agent for service)

Copies of all communications, including communications sent to agent for service, should be sent to:

Albert Lung, Esq.

Morgan, Lewis & Bockius LLP

1400 Page Mill Road

Palo Alto, CA 94304

(650) 843-4000

Approximate date of commencement of proposed sale to the public:

From time to time after the effective date of this
registration statement.</div>

If the only securities being registered on this form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ¨

If any of the securities
being registered on this form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following Box. ¨

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ¨

If this form is a post-effective amendment filed pursuant to Rule 462(c)