Company: GCTS
Filing Date: 2025-08-04
Form Type: DEF 14A
Source: 0000950170-25-102009
Chunk: 56

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-08-04
Form: DEF 14A
Chunk 56
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 Week or by Mail GCT SEMICONDUCTOR HOLDING, INC. Your Internet vote authorizes the named proxies to vote your shares in the same manner as if you marked, signed and returned your proxy card. Votes submitted electronically over the Internet must be received by 11:59 p.m., Eastern Time, on September 17, 2025. INTERNET – www.cstproxyvote.com Use the Internet to vote your proxy. Have your proxy card available when you access the above website. Follow the prompts to vote your shares. Vote at the Meeting – If you plan to attend the virtual online annual meeting, you will need your 12 digit control number to vote electronically at the annual meeting. To attend the annual meeting, visit: https://www.cstproxy.com/gctsemi/2025 MAIL – Mark, sign and date your proxy card and return it in the postage-paid envelope provided. PLEASE DO NOT RETURN THE PROXY CARD IF YOU ARE VOTING ELECTRONICALLY. PROXY FOLD HERE • DO NOT SEPARATE • INSERT IN ENVELOPE PROVIDED Please mark your votes like this THE BOARD OF DIRECTORS RECOMMENDS A VOTE “FOR” ALL PROPOSALS. Election of the Company’s two nominees for Class I directors. (1) Nelson C. Chan (2) Dr. Kukjin Chun FOR all nominees listed to the left WITHHOLD AUTHORITY to vote (except as marked to the contrary for all nominees listed to the left) 2. Ratification of the selection of BPM LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025. FOR AGAINST ABSTAIN 3. Approval for purposes of complying with the rules of the New York Stock Exchange, the issuance of shares of the Company’s common stock in excess of 19.99% of its outstanding common stock pursuant to the Company’s equity line of credit facility. FOR AGAINST ABSTAIN (INSTRUCTION: To withhold authority to vote for any individual nominee, write that nominee’s name in the space below) CONTROL NUMBER Signature Signature, if held jointly Date 2025. Note: Please sign exactly as name appears hereon. When shares are held by joint owners, both should sign. When signing as attorney, executor, administrator, trustee, guardian, or corporate officer, please give title as such.

2025 Important Notice Regarding the Internet Availability of Proxy Materials for the Annual Meeting to be held on September 18, 2025. To view