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Disclosery

GCTS GCT SEMICONDUCTOR HLDG INC

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COMMON STOCK (common), issuer CIK 1851961

53 managers (55 13F filers) reported a position in GCTS shares at 2026-06-30, 12,570,562 shares in all. 29 filers opened a position and 6 filers sold out during the quarter.

Managers
53
13F filers
55
New
29
Added
19
Reduced
2
Sold out
6
Shares held by filers
12,570,562

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
VANGUARD GROUP INCgroup of 3 filers holding3,443,670$10.2M+1,442,096Timeline
RENAISSANCE TECHNOLOGIES LLC1,695,300$5.04M0.01%new13F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,296,433$3.85M<0.01%new13F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.1,281,164$3.81M<0.01%+683,21713F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL818,485$2.43M0.01%new13F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC767,459$2.28M<0.01%+293,11313F-HRTimelineGroup
UBS Group AGin group UBS Group AG646,238$1.92M<0.01%+608,87513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP353,089$1.05M<0.01%+112,50013F-HRTimelineGroup
Informed Momentum Co LLC241,246$717K0.06%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd164,717$489K0.01%+139,03813F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP155,346$461K<0.01%+92,64513F-HRTimelineGroup
Robertson Stephens Wealth Management, L…150,000$446K0.01%new13F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO142,901$424K<0.01%new13F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC133,082$395K<0.01%new13F-HRTimelineGroup
Team Hewins, LLC125,640$373K0.1%013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC112,837$335K<0.01%+45,32413F-HRTimelineGroup
ExodusPoint Capital Management, LP88,539$263K<0.01%new13F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC77,168$229K<0.01%new13F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC75,000$223K<0.01%013F-HRTimeline
Caitong International Asset Management …65,817$195K0.03%+65,79813F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth64,000$190K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/63,164$188K<0.01%+15113F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…58,713$174K<0.01%new13F-HRTimelineGroup
BRC Group Holdings, Inc.56,818$169K0.04%013F-HRTimeline
INDEPENDENT FINANCIAL GROUP, LLC49,250$146K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA49,213$146K<0.01%+46,95613F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY43,532$129K<0.01%+24,24313F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.39,400$117K<0.01%new13F-HRTimelineGroup
Spark Investment Management LLC37,100$110K0.22%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC31,956$94.9K<0.01%new13F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC31,845$94.6K<0.01%new13F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP31,730$94.2K<0.01%new13F-HRTimelineGroup
Engineers Gate Manager LP30,248$89.8K<0.01%+6,73213F-HRTimeline
AXQ CAPITAL, LP25,898$76.9K0.01%new13F-HRTimeline
LPL Financial LLC20,935$62.2K<0.01%+10,93513F-HRTimeline
Braeburn Wealth Management LLC15,500$46K0.02%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…15,000$44.5K<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp12,675$37.6K<0.01%new13F-HRTimelineGroup
StoneX Group Inc.in group StoneX Group Inc.12,835$37.4K<0.01%new13F-HRTimelineGroup
IMC-Chicago, LLC10,700$31.8K<0.01%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC7,090$21.1K<0.01%new13F-HRTimelineGroup
SIMPLEX TRADING, LLC7,048$20.9K<0.01%new13F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO6,213$15.9K<0.01%+6,02713F-HRTimelineGroup
FMR LLCin group FMR LLC3,718$11K<0.01%new13F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.3,400$10.1K<0.01%+1,40013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…3,273$9.72K<0.01%013F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,200$5.17K<0.01%new13F-HRTimelineGroup
SBI Securities Co., Ltd.1,115$3.31K<0.01%+99613F-HRTimeline
Quarry LP1,036$3.08K<0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS578$1.72K<0.01%-1713F-HRTimelineGroup
Arax Advisory Partners85$252<0.01%-3,04013F-HRTimeline
KERR FINANCIAL PLANNING Corp10$30<0.01%new13F-HRTimeline
Avion Wealth153$00%new13F-HRTimelineValue filed as zero, left out of ratios.