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GCT Semiconductor Holding, Inc.

GCTS
Exchange
NYSE
Industry
Semiconductors & Related Devices
SEC CIK
0001851961

No open-market purchases or sales by GCT Semiconductor Holding, Inc. insiders were filed in the last 90 days; 55 institutions reported holding it in 13F filings for Q2 2026, worth $37.3M in total; no superinvestor holds it.

Other share classesGCTS.WT

Holders of 5% or more of GCTS

Holders whose latest Schedule 13D or 13G filing reports 5% or more of GCT Semiconductor Holding, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of GCTS
HolderLatest formStakeChangeFirst filedLatest filingFiling
TD Securities (USA) LLC13G/A7.20%3.76M shares0.00 ppfrom 7.20%Feb 14, 20252 filingsAug 12, 2025SEC
SUNP Corp13G/A5.20%2.91M shares−3.10 ppfrom 8.30%Apr 15, 20252 filingsAug 22, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

5 Schedule 13D and 13G filings on GCT Semiconductor Holding, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on GCTS
Filed (ET)FilerFormStakeChangeEvent dateFiling
Aug 22, 20254:01 PM ETSUNP Corp13G/A5.20%2.91M shares−3.10 ppfrom 8.30%Jun 30, 2025SEC
Aug 12, 20252:02 PM ETTD Securities (USA) LLCand 3 others13G/A7.20%3.76M shares0.00 ppfrom 7.20%Jun 30, 2025SEC
Apr 15, 20254:03 PM ETSUNP Corp13G8.30%4.02M sharesNewDec 31, 2024SEC
Mar 28, 20254:04 PM ETConcord Sponsor Group III LLC13G/A1.31%632.6K shares–Below 5%Mar 26, 2025SEC
Feb 14, 20252:15 PM ETTD Securities (USA) LLCand 4 others13G7.20%3.69M sharesNewDec 31, 2024SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell GCT Semiconductor Holding, Inc. shares.

No Form 144 notices for GCT Semiconductor Holding, Inc. are on file.