GCT Semiconductor (GCTS) director receives 22,916 RSUs vesting March 2026

Rhea-AI Filing Summary

GCT Semiconductor Holding, Inc. reported that a Class II director received a new equity award in the form of restricted stock units. On 12/31/2025, the director was granted 22,916 shares of common stock at a price of $0 per share, reported as common stock acquired in a direct ownership capacity.

The award is structured as RSUs, each representing one share of common stock that will be delivered after vesting, in line with a deferral election made by the director. The number of RSUs for this quarter was calculated by dividing $27,500 by the fair market value of the stock, which was $1.20 per share on 12/31/2025, rounded down to the nearest whole share. The RSUs are scheduled to vest on March 31, 2026, assuming the director continues in service through that date, and they have no expiration date.

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

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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^*

Barker Robert

(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)
12/31/2025

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	12/31/2025		A		22,916(1)(2)(3)(4)	A	$0	118,329	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:

1. Each Restricted Stock Unit ("RSU") represents the right to receive one share of common stock, par value $0.0001 per share ("Common Stock") of GCT Semiconductor Holding, Inc. (the "Issuer") following vesting. The RSUs become payable in Common Stock in accordance with a deferral election made by the reporting person.

2. The number of shares subject to and issuable under the award is determined on the last day of each calendar quarter during the period April 1, 2025 through March 31, 2026 (beginning with the quarter ending June 30, 2025) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $1.20 on December 31, 2025, rounded down to the nearest whole share.

3. The RSUs will vest on March 31, 2026, subject to continued service through such date.

4. No expiration date is applicable to restricted stock units.

	/s/ Edmond Cheng, attorney-in-fact	01/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did GCT Semiconductor Holding, Inc. (GCTS) report?

GCT Semiconductor Holding, Inc. reported that a Class II director acquired 22,916 shares of common stock through a grant of restricted stock units, recorded on 12/31/2025 at a reported price of $0 per share.

How was the number of RSUs determined in this GCTS Form 4 filing?

The number of RSUs was determined by dividing $27,500 by the fair market value of GCT Semiconductor common stock, which was $1.20 per share on 12/31/2025, and rounding down to the nearest whole share, resulting in 22,916 RSUs.

When do the reported GCT Semiconductor (GCTS) RSUs vest?

The restricted stock units reported for the GCT Semiconductor director are scheduled to vest on March 31, 2026, subject to the director’s continued service through that date.

What does each RSU represent in the GCT Semiconductor (GCTS) filing?

Each restricted stock unit represents the right to receive one share of GCT Semiconductor Holding, Inc. common stock, which becomes payable in stock after vesting, in accordance with a deferral election made by the reporting person.

Does the GCT Semiconductor (GCTS) RSU award have an expiration date?

The filing states that no expiration date is applicable to the restricted stock units granted to the director.

How many GCT Semiconductor (GCTS) shares does the director beneficially own after this transaction?

Following the reported RSU-related acquisition, the director is shown as beneficially owning 118,329 shares of GCT Semiconductor common stock in direct ownership form.