GCT Semiconductor (GCTS) grants 24,122 RSUs to director Chun Kukjin

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Chun Kukjin reported acquisition or exercise transactions in this Form 4 filing.

GCT Semiconductor Holding, Inc. director Chun Kukjin received a grant of 24,122 shares of common stock as a stock award, recorded at a price of $0.00 per share. Following this award, his direct holdings total 89,377 common shares.

The award is structured as Restricted Stock Units, each representing one share of common stock after vesting. The number of RSUs for this quarter was set by dividing $27,500 by the fair market value of $1.14 per share on March 31, 2026, rounded down, and will vest on March 31, 2026, subject to continued service.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Chun Kukjin

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	24,122	$0.00	--

Holdings After Transaction: Common Stock — 89,377 shares (Direct)

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, 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 $1.14 on March 31, 2026, 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.

Key Figures

RSU grant size: 24,122 shares Holdings after grant: 89,377 shares Quarterly grant value base: $27,500 +2 more

5 metrics

RSU grant size 24,122 shares Common Stock award on March 31, 2026

Holdings after grant 89,377 shares Total direct common shares following transaction

Quarterly grant value base $27,500 Amount divided by fair market value to set RSU count

Fair market value per share $1.14 per share Common Stock fair market value on March 31, 2026

Vesting date March 31, 2026 RSUs vest subject to continued service through this date

Key Terms

Restricted Stock Unit, fair market value per share, deferral election, vest, +1 more

5 terms

Restricted Stock Unit financial

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

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

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, 2026, 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.

restricted stock units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Form 4 Insider Transactions: What Each Field Means →

04/02/2026 - 07:03 AM

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)
03/31/2026

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	03/31/2026		A		24,122⁽¹⁾⁽²⁾⁽³⁾⁽⁴⁾	A	$0	89,377	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, 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 $1.14 on March 31, 2026, 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	04/02/2026
	** 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 on this Form 4?

Director Chun Kukjin reported receiving 24,122 shares of GCT Semiconductor common stock as a stock award. This grant is part of a Restricted Stock Unit arrangement and increased his direct holdings to 89,377 shares, reflecting routine equity-based director compensation rather than an open-market purchase.

How were Chun Kukjin’s 24,122 GCTS RSUs calculated?

The 24,122 RSUs were determined by dividing $27,500 by the fair market value of GCT Semiconductor common stock. On March 31, 2026, that value was $1.14 per share, and the result was rounded down to the nearest whole share, setting the grant size.

When do Chun Kukjin’s new GCTS RSUs vest?

The RSUs granted to Chun Kukjin will vest on March 31, 2026. Vesting is conditioned on his continued service through that date, meaning the shares are delivered only after this vesting date is reached and the service requirement is satisfied.

What is the total GCTS shareholding of Chun Kukjin after this award?

After this award, Chun Kukjin directly holds 89,377 shares of GCT Semiconductor common stock. This total includes the newly granted 24,122-share stock award tracked as Restricted Stock Units, which convert into shares in accordance with the plan’s vesting and deferral terms.

Does Chun Kukjin pay for the 24,122 GCTS RSUs he received?

The filing shows a transaction price of $0.00 per share for the 24,122-share award, indicating it is a compensation grant rather than a purchase. The economic value is tied to a $27,500 quarterly amount and the company’s fair market share price.