GCT Semiconductor Holding, Inc.

Symbol
GCTS, GCTS-WT on NYSE
Entity
Company
Business address
2290 North 1 St Street, Suite 201, 95131 San Jose, CA
Phone
408-434-6040
State of incorporation
DE
Fiscal year end
December 31
Category

Emerging growth company
Former names
Concord Acquisition Corp III (to 3/28/2024)
All SEC filings
View on sec.gov
Get insider transactions for this issuer
GCT Semiconductor Holding, Inc. has filed 281 SEC EDGAR filings since 3/26/2021

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing Oct 3, 2025 Sep 30, 2025
4 Open Document Open Filing Oct 2, 2025 Sep 30, 2025
4 Open Document Open Filing Oct 2, 2025 Sep 30, 2025
4 Open Document Open Filing Oct 2, 2025 Sep 30, 2025
4 Open Document Open Filing Oct 2, 2025 Sep 30, 2025
4 Open Document Open Filing Oct 2, 2025 Sep 30, 2025
4 Open Document Open Filing Sep 30, 2025 Sep 26, 2025
4 Open Document Open Filing Sep 23, 2025 Sep 19, 2025
4 Open Document Open Filing Sep 23, 2025 Sep 19, 2025
4 Open Document Open Filing Sep 23, 2025 Sep 19, 2025
4 Open Document Open Filing Sep 23, 2025 Sep 19, 2025
8-K Open Document | Data Open Filing CURRENT REPORT Sep 19, 2025 Sep 18, 2025 001-41013
4 Open Document Open Filing Sep 16, 2025 Sep 12, 2025
8-K Open Document | Data Open Filing CURRENT REPORT Sep 11, 2025 Sep 10, 2025 001-41013
4 Open Document Open Filing Sep 8, 2025 Sep 4, 2025
SCHEDULE 13G/A Open Document Open Filing Aug 22, 2025 005-93046
4 Open Document Open Filing Aug 19, 2025 Aug 15, 2025
10-Q Open Document | Data Open Filing 10-Q Aug 12, 2025 Jun 30, 2025 001-41013
8-K Open Document | Data Open Filing CURRENT REPORT Aug 12, 2025 Aug 12, 2025 001-41013
SCHEDULE 13G/A Open Document Open Filing Aug 12, 2025 005-93046
ARS Open Document Open Filing Aug 4, 2025 Jul 27, 2025 001-41013
DEFA14A Open Document Open Filing Aug 4, 2025 001-41013
DEF 14A Open Document | Data Open Filing DEF 14A Aug 4, 2025 Sep 18, 2025 001-41013
PRE 14A Open Document | Data Open Filing PRE 14A Jul 25, 2025 Sep 18, 2025 001-41013
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jul 2, 2025 Jun 30, 2025
4 Open Document Open Filing Jun 12, 2025 Jun 10, 2025
EFFECT Open Document Open Filing Jun 10, 2025 333-278809
EFFECT Open Document Open Filing Jun 6, 2025 333-286704
POS AM Open Document Open Filing Jun 6, 2025 333-278809
8-K Open Document | Data Open Filing CURRENT REPORT Jun 6, 2025 Jun 6, 2025 001-41013
4 Open Document Open Filing Jun 6, 2025 Jun 4, 2025
CORRESP Open Document Open Filing Jun 4, 2025
CORRESP Open Document Open Filing May 30, 2025
S-3/A Open Document Open Filing FORM S-3/A May 30, 2025 333-286704
4 Open Document Open Filing May 27, 2025 May 23, 2025
4 Open Document Open Filing May 21, 2025 May 20, 2025
UPLOAD Open Document Open Filing May 20, 2025 333-286704
8-K Open Document | Data Open Filing FORM 8-K May 16, 2025 May 15, 2025 001-41013
424B5 Open Document Open Filing 424B5 May 16, 2025 333-286316
8-K Open Document | Data Open Filing CURRENT REPORT May 14, 2025 May 14, 2025 001-41013
10-Q Open Document | Data Open Filing 10-Q May 14, 2025 Mar 31, 2025 001-41013
CORRESP Open Document Open Filing May 13, 2025
S-3/A Open Document Open Filing FORM S-3/A May 13, 2025 333-286704
EFFECT Open Document Open Filing May 2, 2025 333-279600
UPLOAD Open Document Open Filing May 1, 2025 333-286704
EFFECT Open Document Open Filing Apr 30, 2025 333-286713
POS AM Open Document Open Filing Apr 30, 2025 333-279600
CORRESP Open Document Open Filing Apr 28, 2025
UPLOAD Open Document Open Filing Apr 28, 2025 333-286713
S-3 Open Document Open Filing FORM S-3 Apr 23, 2025 333-286713
S-3 Open Document Open Filing FORM S-3 Apr 23, 2025 333-286704
4 Open Document Open Filing Apr 23, 2025 Mar 26, 2025
8-K Open Document | Data Open Filing CURRENT REPORT Apr 17, 2025 Apr 16, 2025 001-41013
SCHEDULE 13G Open Document Open Filing Apr 15, 2025 005-93046
4/A Open Document Open Filing Apr 14, 2025 Mar 26, 2024
EFFECT Open Document Open Filing Apr 9, 2025 333-286316
4/A Open Document Open Filing Apr 7, 2025 Mar 26, 2024
CORRESP Open Document Open Filing Apr 7, 2025
UPLOAD Open Document Open Filing Apr 4, 2025 333-286316
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
4 Open Document Open Filing Apr 2, 2025 Mar 31, 2025
S-3 Open Document Open Filing S-3 Apr 1, 2025 333-286316
SCHEDULE 13G/A Open Document Open Filing Mar 28, 2025 005-93046
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 28, 2025 Mar 26, 2025
424B3 Open Document Open Filing Mar 26, 2025 333-279600
424B3 Open Document Open Filing Mar 26, 2025 333-278809
10-K Open Document | Data Open Filing 10-K Mar 25, 2025 Dec 31, 2024 001-41013
8-K Open Document | Data Open Filing CURRENT REPORT Mar 25, 2025 Mar 25, 2025 001-41013
4/A Open Document Open Filing Feb 27, 2025 Mar 26, 2024
4/A Open Document Open Filing Feb 27, 2025 Mar 26, 2024
4 Open Document Open Filing Feb 21, 2025 Jan 13, 2025
4 Open Document Open Filing Feb 21, 2025 Feb 19, 2025
SCHEDULE 13G Open Document Open Filing Feb 14, 2025 005-93046
8-K Open Document | Data Open Filing CURRENT REPORT Jan 29, 2025 Jan 24, 2025 001-41013
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Jan 2, 2025 Dec 31, 2024
4 Open Document Open Filing Dec 16, 2024 Dec 13, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
4 Open Document Open Filing Nov 21, 2024 Sep 30, 2024
424B3 Open Document Open Filing Nov 18, 2024 333-278809
424B3 Open Document Open Filing Nov 15, 2024 333-279600
424B3 Open Document Open Filing Nov 15, 2024 333-279600
SC 13G/A Open Document Open Filing Nov 14, 2024 005-93046
10-Q Open Document | Data Open Filing 10-Q Nov 14, 2024 Sep 30, 2024 001-41013
8-K Open Document | Data Open Filing 8-K Nov 14, 2024 Nov 14, 2024 001-41013
SC 13G/A Open Document Open Filing SC 13G/A Nov 13, 2024 005-93046
SC 13G/A Open Document Open Filing Nov 13, 2024 005-93046
SC 13G/A Open Document Open Filing SC 13G/A Nov 12, 2024 005-93046
SC 13G Open Document Open Filing COWEN AND COMPANY, LLC Nov 12, 2024 005-93046
424B3 Open Document Open Filing Sep 27, 2024 333-278809
424B3 Open Document Open Filing Sep 27, 2024 333-278809
4 Open Document Open Filing Sep 27, 2024 Sep 26, 2024
8-K Open Document | Data Open Filing CURRENT REPORT Sep 26, 2024 Sep 26, 2024 001-41013
424B3 Open Document Open Filing 424B3 Aug 27, 2024 333-279600
424B3 Open Document Open Filing 424B3 Aug 27, 2024 333-278809
8-K Open Document | Data Open Filing FORM 8-K Aug 26, 2024 Aug 21, 2024 001-41013
4 Open Document Open Filing Aug 23, 2024 Aug 21, 2024
424B3 Open Document Open Filing 424B3 Aug 16, 2024 333-279600
424B3 Open Document Open Filing 424B3 Aug 16, 2024 333-278809
10-Q Open Document | Data Open Filing 10-Q Aug 14, 2024 Jun 30, 2024 001-41013
8-K Open Document | Data Open Filing FORM 8-K Aug 14, 2024 Aug 14, 2024 001-41013
424B3 Open Document Open Filing 424B3 Jul 10, 2024 333-279600
8-K Open Document | Data Open Filing FORM 8-K Jul 10, 2024 Jul 10, 2024 001-41013
4 Open Document Open Filing Jul 5, 2024 Jun 30, 2024
4 Open Document Open Filing Jul 3, 2024 Jun 30, 2024
4 Open Document Open Filing Jul 3, 2024 Jun 30, 2024
4 Open Document Open Filing Jul 3, 2024 Jun 30, 2024
4 Open Document Open Filing Jul 3, 2024 Jun 30, 2024
4 Open Document Open Filing Jul 3, 2024 Jun 30, 2024
SC 13G/A Open Document Open Filing SC 13G/A Jun 28, 2024 005-93046
S-8 Open Document Open Filing S-8 Jun 7, 2024 333-280054
EFFECT Open Document Open Filing Jun 6, 2024 333-279600
CORRESP Open Document Open Filing Jun 4, 2024
424B3 Open Document Open Filing 424B3 Jun 4, 2024 333-278809
EFFECT Open Document Open Filing Jun 3, 2024 333-278809
CORRESP Open Document Open Filing May 31, 2024
UPLOAD Open Document Open Filing May 28, 2024 333-279600
CORRESP Open Document Open Filing May 23, 2024
S-1/A Open Document | Data Open Filing S-1/A May 23, 2024 333-278809
UPLOAD Open Document Open Filing May 22, 2024 333-278809
S-1 Open Document | Data Open Filing S-1 May 22, 2024 333-279600
CORRESP Open Document Open Filing May 17, 2024
S-1/A Open Document | Data Open Filing S-1/A May 17, 2024 333-278809
10-Q Open Document | Data Open Filing 10-Q May 14, 2024 Mar 31, 2024 001-41013
8-K Open Document | Data Open Filing FORM 8-K May 14, 2024 May 14, 2024 001-41013
UPLOAD Open Document Open Filing May 6, 2024 333-278809
4/A Open Document Open Filing May 3, 2024 Mar 26, 2024
4/A Open Document Open Filing May 3, 2024 Mar 26, 2024
SC 13G/A Open Document Open Filing May 3, 2024 005-93046
SC 13G/A Open Document Open Filing Apr 29, 2024 005-93046
8-K Open Document | Data Open Filing FORM 8-K Apr 24, 2024 Apr 23, 2024 001-41013
S-1 Open Document | Data Open Filing S-1 Apr 19, 2024 333-278809
8-K Open Document | Data Open Filing FORM 8-K Apr 8, 2024 Apr 4, 2024 001-41013
SC 13G Open Document Open Filing Apr 5, 2024 005-93046
8-A12B/A Open Document Open Filing 8-A12B/A Apr 5, 2024 001-41013
SC 13G Open Document Open Filing Apr 3, 2024 005-93046
8-K Open Document | Data Open Filing FORM 8-K Apr 1, 2024 Mar 26, 2024 001-41013
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 28, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 28, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
4 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
3 Open Document Open Filing Mar 27, 2024 Mar 26, 2024
25-NSE Open Document Open Filing Mar 27, 2024 001-41013
425 Open Document Open Filing FORM 425 Mar 22, 2024 001-41013
SC 13G/A Open Document Open Filing Mar 11, 2024 005-93046
10-K Open Document | Data Open Filing 10-K Mar 8, 2024 Dec 31, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Feb 29, 2024 Feb 27, 2024 001-41013
425 Open Document Open Filing 425 Feb 15, 2024 001-41013
EFFECT Open Document Open Filing Feb 14, 2024 333-275522
SC 13G Open Document Open Filing Feb 14, 2024 005-93046
SC 13G Open Document Open Filing SC 13G Feb 14, 2024 005-93046
424B3 Open Document Open Filing 424B3 Feb 14, 2024 333-275522
SC 13G/A Open Document Open Filing 683 CAPITAL MANAGEMENT, LLC Feb 14, 2024 005-93046
SC 13G Open Document Open Filing Feb 14, 2024 005-93046
SC 13G Open Document Open Filing Feb 14, 2024 005-93046
SC 13G Open Document Open Filing SC 13G Feb 13, 2024 005-93046
CORRESP Open Document Open Filing Feb 12, 2024
SC 13G Open Document Open Filing SC 13G Feb 9, 2024 005-93046
CORRESP Open Document Open Filing Feb 9, 2024
S-4/A Open Document | Data Open Filing FORM S-4/A Feb 9, 2024 333-275522
SC 13G/A Open Document Open Filing FORM SC 13G/A Feb 9, 2024 005-93046
SC 13G/A Open Document Open Filing FORM SC 13G/A Feb 7, 2024 005-93046
CORRESP Open Document Open Filing Jan 31, 2024
S-4/A Open Document Open Filing S-4/A Jan 31, 2024 333-275522
SC 13G Open Document Open Filing SC 13G Jan 31, 2024 005-93046
UPLOAD Open Document Open Filing Jan 25, 2024 333-275522
8-K Open Document | Data Open Filing FORM 8-K Jan 25, 2024 Jan 19, 2024 001-41013
SC 13G/A Open Document Open Filing CONCORD ACQUISITION CORP III Jan 19, 2024 005-93046
S-4/A Open Document Open Filing S-4/A Jan 11, 2024 333-275522
CORRESP Open Document Open Filing Jan 10, 2024
SC 13G/A Open Document Open Filing AMENDMENT NO. 1 Jan 9, 2024 005-93046
UPLOAD Open Document Open Filing Jan 5, 2024 333-275522
SC 13G Open Document Open Filing Dec 28, 2023 005-93046
CORRESP Open Document Open Filing Dec 21, 2023
S-4/A Open Document | Data Open Filing FORM S-4/A Dec 21, 2023 333-275522
UPLOAD Open Document Open Filing Dec 8, 2023 333-275522
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 17, 2023 Nov 16, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 17, 2023 Nov 16, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 17, 2023 Nov 16, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 17, 2023 Nov 16, 2023
10-Q Open Document | Data Open Filing 10-Q Nov 14, 2023 Sep 30, 2023 001-41013
S-4 Open Document | Data Open Filing FORM S-4 Nov 13, 2023 333-275522
8-K Open Document | Data Open Filing FORM 8-K Nov 13, 2023 Nov 7, 2023 001-41013
SC 13G Open Document Open Filing SC 13G Nov 9, 2023 005-93046
425 Open Document Open Filing 425 Nov 8, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Nov 8, 2023 Nov 2, 2023 001-41013
425 Open Document Open Filing 425 Nov 3, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Nov 3, 2023 Nov 3, 2023 001-41013
DEFA14A Open Document Open Filing DEFA14A Nov 2, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Nov 2, 2023 Nov 2, 2023 001-41013
DEFA14A Open Document Open Filing DEFA14A Oct 31, 2023 001-41013
8-K Open Document | Data Open Filing 8-K Oct 31, 2023 Oct 31, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Oct 30, 2023 Oct 30, 2023 001-41013
DEFA14A Open Document Open Filing DEFA14A Oct 25, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Oct 25, 2023 Oct 25, 2023 001-41013
DEF 14A Open Document Open Filing DEF 14A Oct 13, 2023 Nov 6, 2023 001-41013
PRE 14A Open Document Open Filing PRE 14A Sep 29, 2023 Sep 29, 2023 001-41013
10-Q Open Document | Data Open Filing 10-Q Aug 10, 2023 Jun 30, 2023 001-41013
SC 13G Open Document Open Filing May 16, 2023 005-93046
10-Q Open Document | Data Open Filing 10-Q May 11, 2023 Mar 31, 2023 001-41013
SC 13G Open Document Open Filing SC 13G May 9, 2023 005-93046
8-K Open Document | Data Open Filing FORM 8-K May 8, 2023 May 4, 2023 001-41013
DEFA14A Open Document Open Filing DEFA14A Apr 7, 2023 001-41013
8-K Open Document | Data Open Filing FORM 8-K Apr 7, 2023 Apr 6, 2023 001-41013
DEF 14A Open Document Open Filing DEF 14A Apr 6, 2023 May 4, 2023 001-41013
UPLOAD Open Document Open Filing Apr 4, 2023
CORRESP Open Document Open Filing Apr 4, 2023
PRER14A Open Document Open Filing PRER14A Apr 4, 2023 001-41013
UPLOAD Open Document Open Filing Apr 3, 2023
PRE 14A Open Document Open Filing PRE 14A Mar 27, 2023 Mar 27, 2023 001-41013
10-K Open Document | Data Open Filing 10-K Feb 27, 2023 Dec 31, 2022 001-41013
SC 13G/A Open Document Open Filing FORM SC 13G/A Feb 14, 2023 005-93046
SC 13G/A Open Document Open Filing Feb 10, 2023 005-93046
SC 13G/A Open Document Open Filing CONCORD ACQUISITION CORP III Jan 31, 2023 005-93046
10-Q Open Document | Data Open Filing 10-Q Nov 4, 2022 Sep 30, 2022 001-41013
10-Q Open Document | Data Open Filing 10-Q Aug 12, 2022 Jun 30, 2022 001-41013
SC 13G Open Document Open Filing FORM SC 13G May 27, 2022 005-93046
10-Q Open Document | Data Open Filing 10-Q May 9, 2022 Mar 31, 2022 001-41013
10-K Open Document | Data Open Filing 10-K Mar 18, 2022 Dec 31, 2021 001-41013
SC 13G Open Document Open Filing SC 13G Feb 14, 2022 005-93046
SC 13G/A Open Document Open Filing Feb 11, 2022 005-93046
SC 13G/A Open Document Open Filing CONCORD ACQUISITION CORP III Feb 3, 2022 005-93046
10-Q Open Document | Data Open Filing 10-Q Dec 16, 2021 Sep 30, 2021 001-41013
SC 13G Open Document Open Filing CONCORD ACQUISITION CORP III Nov 18, 2021 005-93046
SC 13G Open Document Open Filing Nov 17, 2021 005-93046
SC 13G Open Document Open Filing Nov 16, 2021 005-93046
8-K Open Document Open Filing FORM 8-K Nov 15, 2021 Nov 8, 2021 001-41013
8-K Open Document Open Filing FORM 8-K Nov 9, 2021 Nov 3, 2021 001-41013
424B4 Open Document Open Filing 424B4 Nov 5, 2021 333-254789
EFFECT Open Document Open Filing Nov 3, 2021 333-254789
S-1MEF Open Document Open Filing FORM S-1MEF Nov 3, 2021 333-260751
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 3, 2021 Nov 3, 2021
CERT Open Document Open Filing NYSE CERTIFICATION Nov 3, 2021 001-41013
8-A12B Open Document Open Filing 8-A12B Nov 3, 2021 001-41013
CORRESP Open Document Open Filing Nov 1, 2021
CORRESP Open Document Open Filing Nov 1, 2021
S-1/A Open Document Open Filing S-1/A Oct 15, 2021 333-254789
S-1/A Open Document Open Filing S-1/A Jul 1, 2021 333-254789
CORRESP Open Document Open Filing May 7, 2021
S-1/A Open Document Open Filing FORM S-1/A May 7, 2021 333-254789
UPLOAD Open Document Open Filing Apr 22, 2021
S-1 Open Document Open Filing S-1 Mar 26, 2021 333-254789