[Form 4] GCT Semiconductor Holding, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Kim Jeong-Min, Chief Technology Officer of GCT Semiconductor Holding, Inc. (GCTS), was granted 75,000 restricted stock units (RSUs) on 09/19/2025. The RSUs are a contingent right to receive one share of common stock each and vest in four equal annual installments of 25% beginning on 09/19/2026, subject to continued service. After the grant the reporting person beneficially owned 302,701 shares. The Form 4 was signed by an attorney-in-fact on 09/22/2025. The filing documents a standard executive equity award intended for retention and aligns the officer’s compensation with shareholder value.

Positive

• 75,000 RSUs awarded to the CTO, indicating executive retention and alignment with shareholder incentives
• Clear vesting schedule (25% annually over four years) promotes continued service

Negative

• No grant-value disclosed, so the financial impact and potential dilution cannot be assessed from this filing
• Unable to determine materiality because the filing does not state total outstanding shares or market capitalization

Insights

Compensation/Corporate Governance Analyst

TL;DR: A routine executive RSU grant that vests over four years, typical for retention and alignment.

The award of 75,000 RSUs to the CTO is structured as time-based restricted stock units that convert to common shares on vesting. Vesting in equal annual installments over four years is a common design to promote retention. The reported post-transaction beneficial ownership of 302,701 shares provides context on the officer’s existing stake but the filing does not disclose total outstanding shares or grant value, so materiality relative to market capitalization cannot be assessed from this form alone.

Securities/Equity Compensation Specialist

TL;DR: Standard equity compensation disclosure; no derivatives or dispositions reported.

The Form 4 shows a non-derivative acquisition code for RSUs and confirms the grant price is $0 because RSUs are contingent rights to shares rather than purchased units. There are no dispositions or option exercises reported. The filing is procedural and compliant with Section 16 reporting requirements; it lacks valuation or grant-date fair value details that would allow assessment of dilution or expense impact.

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^*

Kim Jeong-Min

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/19/2025

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, par value $0.0001 per share	09/19/2025		A(1)		75,000	A	$0	302,701	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. Represents restricted stock units ("RSU"), which constitute a contingent right to receive one share of common stock, par value $0.0001 per share, of GCT Semiconductor Holding, Inc. The RSUs vest over four years in equal 25% installments on each anniversary of the September 19, 2025 grant date, commencing September 19, 2026, subject to the Reporting Person's continued service with the Issuer.

	/s/ Edmond Cheng, attorney-in-fact	09/22/2025
	** 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 did Kim Jeong-Min report on Form 4 for GCTS?

The report shows a grant of 75,000 restricted stock units (RSUs) on 09/19/2025 and a post-transaction beneficial ownership of 302,701 shares.

When do the RSUs granted to the CTO vest?

The RSUs vest in four equal installments of 25% on each anniversary of the 09/19/2025 grant date, beginning 09/19/2026, subject to continued service.

Was any cash paid for the RSUs reported on the Form 4?

No. The transaction shows a price of $0, consistent with RSUs being contingent rights to receive shares rather than purchased securities.

Does this Form 4 report any dispositions or option exercises?

No. The filing records an acquisition of RSUs and does not show any dispositions or derivative transactions.

Who signed the Form 4 and when was it filed?

The Form 4 was signed by Edmond Cheng, attorney-in-fact and dated 09/22/2025.