GCT Semiconductor grants CEO 150,000 RSUs

GCT Semiconductor’s CEO received a 150,000-unit RSU equity award vesting over four years, increasing his direct holdings to 352,728 shares.

Rhea-AI Filing Summary

GCT Semiconductor Holding, Inc. (symbol: GCTS) is the issuer of record for a Form 4 filing submitted to the SEC. Schlaefer John reported acquisition or exercise transactions in this Form 4 filing.

GCT Semiconductor Holding, Inc. (GCTS) reported that President and CEO John Schlaefer received a grant of 150,000 restricted stock units on September 10, 2026. Each RSU represents a contingent right to receive one share of common stock and vests in four equal annual 25% installments starting September 10, 2026, subject to his continued service. Following this grant, he holds 352,728 shares directly. No Rule 10b5-1 trading plan is reported for this award.

Insider Trade Summary

Grant/Award: 150,000 shares

Grant/Award 1 txn

Insider Schlaefer John

Role President, CEO & Class III Dir

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.0001 per share F1	150,000	$0.00	$0.00

Holdings After Transaction: Common Stock, par value $0.0001 per share — 352,728 shares (Direct)

Footnotes (1)

1. F1. 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 10, 2026 grant date, commencing September 10, 2026, subject to the Reporting Person's continued service with the Issuer.

Key Figures

RSUs granted: 150,000 units Vesting schedule: 25% per year over 4 years Shares held after grant: 352,728 shares +2 more

5 metrics

RSUs granted 150,000 units Restricted stock units awarded to CEO on September 10, 2026

Vesting schedule 25% per year over 4 years RSUs vest annually on each anniversary of September 10, 2026

Shares held after grant 352,728 shares Direct holdings of CEO following the RSU award

Reported grant price $0.0000 per share Equity award with no cash purchase price

Grant date September 10, 2026 Date of RSU grant to CEO

Key Terms

restricted stock units, contingent right, continued service

3 terms

restricted stock units financial

"Represents restricted stock units ("RSU"), which constitute a contingent right"

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.

contingent right financial

"which constitute a contingent right to receive one share of common stock"

continued service financial

"commencing September 10, 2026, subject to the Reporting Person's continued service"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity award did GCTS grant to its CEO John Schlaefer?

GCT Semiconductor granted 150,000 restricted stock units (RSUs) to CEO John Schlaefer on September 10, 2026. Each RSU represents a right to receive one share of common stock, subject to the vesting schedule and his continued service.

How do the new RSUs granted by GCTS (GCTS) vest?

The 150,000 RSUs vest over four years in equal 25% installments on each anniversary of the September 10, 2026 grant date, beginning September 10, 2026, as long as John Schlaefer continues to serve the company.

What are John Schlaefer’s total GCTS share holdings after this Form 4 transaction?

After the RSU grant, John Schlaefer is reported to directly hold 352,728 shares of GCT Semiconductor Holding, Inc. common stock, including the newly awarded restricted stock units subject to vesting.

Does the GCTS CEO’s RSU grant involve a purchase price?

No cash purchase price is shown. The RSUs were reported at a $0.0000 per-share transaction price, reflecting an equity award rather than an open-market purchase.

Was the GCTS CEO’s RSU grant made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked, so no Rule 10b5-1 trading plan is reported in connection with this RSU grant to the CEO.

What conditions apply to the vesting of the GCTS CEO’s RSUs?

The filing states that vesting of the 150,000 RSUs is subject to the Reporting Person's continued service with GCT Semiconductor Holding, Inc. If service terminates, unvested units may not be earned.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/14/2026 - 04:35 PM Accepted by SEC EDGAR 09/14/2026 - 04:30 PM Learn about SEC filing dates

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^*

Schlaefer John

(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
X	Officer (give title below)		Other (specify below)
	President, CEO & Class III Dir

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/10/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001 per share	09/10/2026		A(1)		150,000	A	$0	352,728	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 10, 2026 grant date, commencing September 10, 2026, subject to the Reporting Person's continued service with the Issuer.

	/s/ Edmond Cheng, attorney-in-fact	09/14/2026
	** 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)