Jeffrey Tuder - Sep 30, 2025 Form 4 Insider Report for GCT Semiconductor Holding, Inc. (GCTS)

Role: Director, Class III Director
Signature: /s/ Jeffrey Tuder
Stock symbol: GCTS
Transactions as of: Sep 30, 2025
Transactions value $: $0
Form type: 4
Date filed: 10/3/2025, 04:03 PM
Previous filing: Sep 16, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
TUDER JEFFREY	Director, Class III Director	C/O GCT SEMICONDUCTOR HOLDING, INC., 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE	/s/ Jeffrey Tuder	2025-10-03	0001671976

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GCTS	Common Stock	Award	$0	+18.1K	+23.56%	$0.00	94.9K	Sep 30, 2025	Direct	F1, F2, F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	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 $1.52 on September 30, 2025, rounded down to the nearest whole share.
F3	The RSUs will vest on March 31, 2026, subject to continued service through such date.
F4	No expiration date is applicable to restricted stock units.