GCT Semiconductor (NASDAQ: GCTS) director reports new 22,916 RSU award

Rhea-AI Filing Summary

GCT Semiconductor Holding, Inc. reported an equity award to one of its directors in the form of restricted stock units (RSUs). On 12/31/2025, the director was granted 22,916 RSUs tied to the company’s common stock at a stated price of $0, increasing the director’s beneficial ownership to 105,255 shares.

Each RSU represents the right to receive one share of common stock after vesting and will be settled in stock under a deferral election made by the director. The number of RSUs for this award is determined quarterly from April 1, 2025 through March 31, 2026 by dividing $27,500 by the fair market value per share, which was $1.20 on 12/31/2025 for this portion. These RSUs are scheduled to vest on March 31, 2026, subject to the director’s continued service, and have no stated expiration date.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Chun Kukjin

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	22,916	$0.00	--

Holdings After Transaction: Common Stock — 105,255 shares (Direct)

Footnotes (1)

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. 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. The RSUs will vest on March 31, 2026, subject to continued service through such date. No expiration date is applicable to restricted stock units.

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Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Chun Kukjin

(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 I 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	105,255	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.
* 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 did GCT Semiconductor Holding, Inc. (GCTS) report?

GCT Semiconductor Holding, Inc. reported that a director acquired 22,916 restricted stock units (RSUs) tied to its common stock on 12/31/2025, recorded at a price of $0.

How many GCTS shares does the reporting director beneficially own after this transaction?

Following the reported RSU grant, the director beneficially owns 105,255 shares of GCT Semiconductor Holding, Inc. common stock.

How are the GCTS restricted stock units calculated for this director award?

The number of RSUs is determined on the last day of each calendar quarter from April 1, 2025 through March 31, 2026 by dividing $27,500 by the fair market value per share of GCT Semiconductor Holding, Inc. common stock, rounded down to the nearest whole share.

What fair market value per share was used to calculate the 12/31/2025 GCTS RSU grant?

For the 12/31/2025 determination, the fair market value per share of GCT Semiconductor Holding, Inc. common stock was $1.20, which produced the 22,916 RSUs when dividing $27,500 by that price and rounding down.

When do the reported GCTS RSUs vest for the director?

The RSUs granted to the director are scheduled to vest on March 31, 2026, subject to the director’s continued service through that date.

How will the GCTS restricted stock units be settled for the director?

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

Do the GCTS restricted stock units reported have an expiration date?

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