How was the 9,259-share award to the GCTS director calculated?

The award size is determined by dividing $27,500 by the stock’s fair market value on the last day of each quarter. For the quarter ended June 30, 2026, fair market value was $2.97 per share, which resulted in an award of 9,259 shares, rounded down.

Director at GCT Semiconductor (GCTS) granted 9,259 RSUs as award

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

GCT Semiconductor Holding, Inc. director Chun Kukjin reported an equity compensation grant rather than an open-market trade. He acquired 9,259 shares of common stock at a reported price of $0.00 per share as part of a restricted stock unit award, bringing his direct holdings to 98,636 shares.

The award size is determined quarterly from April 1, 2026 through March 31, 2027 by dividing $27,500 by the fair market value of the stock; on June 30, 2026 that value was $2.97 per share. The RSUs vest on March 31, 2027, subject to continued service, and will be settled in common stock under a deferral election.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Chun Kukjin

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	9,259	$0.00	--

Holdings After Transaction: Common Stock — 98,636 shares (Direct, null)

Footnotes (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, 2026 through March 31, 2027 (beginning with the quarter ending June 30, 2026) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $2.97 on June 30, 2026, rounded down to the nearest whole share. The RSUs will vest on March 31, 2027, subject to continued service through such date. No expiration date is applicable to restricted stock units.

Key Figures

Shares granted: 9,259 shares Price per share: $0.00 per share Holdings after grant: 98,636 shares +4 more

7 metrics

Shares granted 9,259 shares Common stock awarded on June 30, 2026

Price per share $0.00 per share Reported transaction price for the grant

Holdings after grant 98,636 shares Total direct common stock holdings following transaction

Quarterly award value $27,500 Value used to determine RSU shares each quarter

Fair market value $2.97 per share Fair market value on June 30, 2026 used for calculation

Award period April 1, 2026–March 31, 2027 Quarters over which RSU share amounts are determined

Vesting date March 31, 2027 RSUs vest subject to continued service through this date

Key Terms

Restricted Stock Unit ("RSU"), fair market value per share, deferral election, vest

4 terms

Restricted Stock Unit ("RSU") financial

"Each Restricted Stock Unit ("RSU") represents the right to receive one share of common stock..."

deferral election financial

"The RSUs become payable in Common Stock in accordance with a deferral election made by the reporting person."

vest financial

"The RSUs will vest on March 31, 2027, subject to continued service through such date."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 04:51 PM Accepted by SEC EDGAR 07/02/2026 - 04:51 PM

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

CALIFORNIA

95131

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/30/2026		A		9,259⁽¹⁾⁽²⁾⁽³⁾⁽⁴⁾	A	$0	98,636	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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, 2026 through March 31, 2027 (beginning with the quarter ending June 30, 2026) by dividing $27,500 by the fair market value per share of Common Stock, which was determined to be $2.97 on June 30, 2026, rounded down to the nearest whole share.

3. The RSUs will vest on March 31, 2027, subject to continued service through such date.

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

	/s/ Edmond Cheng, attorney-in-fact	07/02/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did GCTS director Chun Kukjin report in this Form 4 filing?

Director Chun Kukjin reported receiving an equity compensation grant of 9,259 shares of GCT Semiconductor Holding common stock. The grant reflects a restricted stock unit award rather than an open-market trade, increasing his direct holdings to 98,636 shares after the transaction.

When will Chun Kukjin’s GCTS restricted stock units vest?

The restricted stock units will vest on March 31, 2027, provided Chun Kukjin continues to serve through that date. Once vested, the RSUs become payable in common stock according to a deferral election he previously made with the company.

Is this GCTS Form 4 transaction a stock purchase or sale in the market?

The transaction is not an open-market purchase or sale. It reflects a grant or award of restricted stock units that convert into 9,259 shares at no cash cost, as part of director compensation, rather than a discretionary buy or sell transaction.

What are Chun Kukjin’s GCTS holdings after this Form 4 transaction?

Following the grant, Chun Kukjin directly holds 98,636 shares of GCT Semiconductor Holding common stock. This figure reflects his position after the 9,259-share award was added and helps indicate the scale of this compensation grant relative to his total stake.

Over what period will the size of Chun Kukjin’s GCTS RSU award be determined?

The number of shares subject to the RSU award is calculated on the last day of each calendar quarter from April 1, 2026 through March 31, 2027. Each quarter uses a $27,500 value divided by that quarter-end fair market value per share.