GCT Semiconductor Holding, Inc.

GCTS·NYSE·$3.30Share Price as of 11/2·$189MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/10/26 10-QQ1 ended 03/31/2605/12/26 10-KFY 202503/25/26 10-QQ3 ended 09/30/2511/12/25 10-QQ2 ended 06/30/2508/12/25

Disclosures

8-KCurrent report09/18/26 8-KCurrent report09/15/26 8-KCurrent report08/10/26 8-KCurrent report06/18/26 8-K/ACurrent report (amended)06/18/26

Prospectuses and Registrations

424B5Prospectus supplement06/18/26 424B5Prospectus supplement03/30/26 424B5Prospectus supplement03/02/26 424B5Prospectus supplement12/15/25 POS AMPost-effective amendment06/06/25

Proxies

DEF 14ADefinitive proxy08/03/26 DEFA14AAdditional proxy materials08/03/26 DEF 14ADefinitive proxy08/04/25 DEFA14AAdditional proxy materials08/04/25 PRE 14APreliminary proxy07/25/25

Ownership

Form 4Insider transaction10/02/26 Form 4Insider transaction10/02/26 Form 4Insider transaction10/02/26 Form 4Insider transaction10/02/26 Form 4Insider transaction10/02/26

Other

ARSAnnual report to shareholders08/03/26 ARSAnnual report to shareholders08/04/25 EFFECTRequest for effectiveness06/10/25 EFFECTRequest for effectiveness06/06/25 CORRESPCorrespondence with the SEC06/04/25