Form 4 Filing for GCT Semiconductor Holding, Inc.

This filing reports a transaction by TUDER JEFFREY, a Class III Director at GCT Semiconductor Holding, Inc. On June 30, 2026, Mr. Jeffrey acquired 9,259 shares of Common Stock through Restricted Stock Units (RSUs). Each RSU represents the right to receive one share of common stock upon vesting. The number of shares acquired was determined by dividing $27,500 by the fair market value per share ($2.97) on the transaction date, rounded down. The RSUs are set to vest on March 31, 2027, subject to continued service. Following this transaction, Mr. Jeffrey owns 151,190 shares of Common Stock. The filing is a Form 4, indicating a change in beneficial ownership.