GCT Semiconductor (NASDAQ: GCTS) director increases stake with 16,725-share buy

Rhea-AI Filing Summary

GCT Semiconductor Holding, Inc. director reports open-market stock purchase. A Class II director of GCT Semiconductor Holding, Inc. (GCTS) bought 16,725 shares of common stock on 11/25/2025 in a reported purchase transaction coded “P” at a price of $1.28 per share. After this trade, the reporting person beneficially owns 757,771 shares of GCT common stock in direct ownership. The filing is made on a Form 4, which discloses changes in insider ownership for a single reporting person.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Shin Hyunsoo

(Last) (First) (Middle)

C/O GCT SEMICONDUCTOR HOLDING, INC.

2290 NORTH 1ST STREET, SUITE 201

(Street)

SAN JOSE CA 95131

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GCT Semiconductor Holding, Inc. [ GCTS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			Class II Director

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/25/2025		P		16,725	A	$1.28	757,771	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Edmond Cheng, attorney-in-fact	11/28/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction was reported for GCT Semiconductor Holding, Inc. (GCTS)?

A Form 4 reports that a Class II director of GCT Semiconductor Holding, Inc. (GCTS) purchased 16,725 shares of GCT common stock on 11/25/2025.

At what price were the GCTS shares purchased in this Form 4 filing?

The director bought the GCT Semiconductor Holding, Inc. common stock at a price of $1.28 per share in an open-market purchase transaction.

How many GCTS shares does the insider own after the reported transaction?

Following the reported purchase, the director beneficially owns 757,771 shares of GCT Semiconductor Holding, Inc. common stock, held as direct ownership.

What is the relationship of the reporting person to GCT Semiconductor Holding, Inc.?

The reporting person is a director of GCT Semiconductor Holding, Inc. and is identified specifically as a Class II Director.

Does this GCTS Form 4 include any derivative securities like options or warrants?

The filing includes a section for derivative securities, but in the provided content there are no derivative transactions listed; only the common stock purchase appears with transaction details.

Is this GCTS Form 4 filed by one or multiple reporting persons?

The document indicates that the Form 4 is filed by one reporting person, not a group filing.