Public ownership evidence

GCT Semiconductor Holding, Inc. (GCTS) Ownership Disclosures

Read GCTS insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Recent Form 4 activity

2026-10-022026-09-30Lee KyeonghoA12,971Not reported
2026-10-022026-09-30Barker RobertA12,971Not reported
2026-10-022026-09-30TUDER JEFFREYA12,971Not reported
2026-10-022026-09-30Chan NelsonA12,971Not reported
2026-10-022026-09-30Chun KukjinA12,971Not reported
2026-10-022026-09-30Shin HyunsooA12,971Not reported
2026-09-142026-09-10Sum AlexA75,000Not reported
2026-09-142026-09-10Schlaefer JohnA150,000Not reported
2026-09-142026-09-10Kim Jeong-MinA100,000Not reported
2026-09-142026-09-10Cheng EdmondA145,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

Jefferies Financial Group Inc.2026-06-302026-08-1839,400$117,018None
SEI INVESTMENTS CO2026-06-302026-08-15142,901$424,416None
Quarry LP2026-06-302026-08-151,036$3,077None
XTX Topco Ltd2026-06-302026-08-15164,717$489,209None
ExodusPoint Capital Management, LP2026-06-302026-08-1588,539$262,961None
OSAIC HOLDINGS, INC.2026-06-302026-08-152,000$5,940None
OSAIC HOLDINGS, INC.2026-06-302026-08-151,400$4,158None
Engineers Gate Manager LP2026-06-302026-08-1530,248$89,837None
JANE STREET GROUP, LLC2026-06-302026-08-153$9None
JANE STREET GROUP, LLC2026-06-302026-08-15133,079$395,245None
JANE STREET GROUP, LLC2026-06-302026-08-1514,700$43,659Put
JANE STREET GROUP, LLC2026-06-302026-08-1514,200$42,174Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1520,283$60,241None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1538,430$114,137None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-1531,956$94,909None
BRC Group Holdings, Inc.2026-06-302026-08-1556,818$168,749None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-152,200$5,170None
ROYAL BANK OF CANADA2026-06-302026-08-1540,000$119,000None
ROYAL BANK OF CANADA2026-06-302026-08-159,213$27,000None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-1575,000$222,750None
CITADEL ADVISORS LLC2026-06-302026-08-1512,800$38,016Put
CITADEL ADVISORS LLC2026-06-302026-08-1517,616$52,320None
CITADEL ADVISORS LLC2026-06-302026-08-1530,300$89,991Call
CITADEL ADVISORS LLC2026-06-302026-08-1559,552$176,869None
TUDOR INVESTMENT CORP ET AL2026-06-302026-08-15818,485$2,430,900None
TWO SIGMA INVESTMENTS, LP2026-06-302026-08-1531,730$94,238None
GOLDMAN SACHS GROUP INC2026-06-302026-08-15112,837$335,126None
BARCLAYS PLC2026-06-302026-08-157,090$21,057None
BANK OF AMERICA CORP /DE/2026-06-302026-08-1563,164$187,597None
VANGUARD CAPITAL MANAGEMENT LLC2026-06-302026-08-142,999,130$8,907,416None
Vanguard Global Advisers, LLC2026-06-302026-08-1427,623$82,040None
Rockefeller Capital Management L.P.2026-06-302026-08-1415,000$44,550None
UBS Group AG2026-06-302026-08-1434,300$101,871None
UBS Group AG2026-06-302026-08-14611,938$1,817,456None
MARSHALL WACE, LLP2026-06-302026-08-141,129,531$3,354,706None
MARSHALL WACE, LLP2026-06-302026-08-14166,902$495,698None
BNP PARIBAS FINANCIAL MARKETS2026-06-302026-08-14578$1,717None
Informed Momentum Co LLC2026-06-302026-08-14241,246$716,501None
RENAISSANCE TECHNOLOGIES LLC2026-06-302026-08-141,695,300$5,035,041None
VANGUARD FIDUCIARY TRUST CO2026-06-302026-08-14416,917$1,238,243None
MORGAN STANLEY2026-06-302026-08-1424,243$72,002None
MORGAN STANLEY2026-06-302026-08-1419,289$57,288None
FMR LLC2026-06-302026-08-143,718$11,042None
NORTHERN TRUST CORP2026-06-302026-08-14155,346$461,378None
Focus Partners Wealth2026-06-302026-08-1364,000$190,080None
SIMPLEX TRADING, LLC2026-06-302026-08-137,048$20,932None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-13167,608$497,795None
GEODE CAPITAL MANAGEMENT, LLC2026-06-302026-08-13599,851$1,782,038None
StoneX Group Inc.2026-06-302026-08-1312,835$37,386None
JPMORGAN CHASE & CO2026-06-302026-08-13186$476None

90-day public filing window, up to 50 source positions.

Jefferies Financial Group Inc. ↗SEI INVESTMENTS CO ↗Quarry LP ↗XTX Topco Ltd ↗ExodusPoint Capital Management, LP ↗OSAIC HOLDINGS, INC. ↗OSAIC HOLDINGS, INC. ↗Engineers Gate Manager LP ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.