GCTS · GCT Semiconductor Holding, Inc. · Holdings

$1.91 +0.05 (+2.69%) At close · Sep 11

Market Cap

$175.66M

91.97M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 56

Total Value: $37,548,380

Total Shares: 12,642,662

Institutional Ownership Trend

19 quarters

Holder Concentration

Across 56 13F filers · Δ vs Mar 31, 2026

Top Holder

23.7%

−15.5 pts

Top 5

64.0%

−14.6 pts

Top 10

83.2%

−8.3 pts

HHI

1,091

Broadly held−918

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +20

Institutional value: +640.1%

Shares held: +184.0%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega VANGUARD CAPITAL MANAGEMENT LLC	+1,254,181	2,999,130
Mega BlackRock, Inc.	+683,217	1,281,164
Mega UBS Group AG	+608,875	646,238
Mega GEODE CAPITAL MANAGEMENT, LLC	+293,113	767,459
Mega VANGUARD FIDUCIARY TRUST CO	+170,673	416,917

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds	Open
Mid Arax Advisory Partners	−3,040	85
Mega BNP PARIBAS ARBITRAGE, SA	−17	578

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Large RENAISSANCE TECHNOLOGIES LLC	1,695,300	$5,035,041
Large MARSHALL WACE, LLP	1,296,433	$3,850,405
Large TUDOR INVESTMENT CORP ET AL	818,485	$2,430,900
Mid Informed Momentum Co LLC	241,246	$716,500
Mega JANE STREET GROUP, LLC	161,982	$481,085

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid GM Advisory Group, LLC	434,456	$495,279
Large Point72 Asset Management, L.P.	51,604	$58,828
Large HRT FINANCIAL LP	35,818	$40,832
Large Schonfeld Strategic Advisors LLC	13,200	$15,048
Large MAI Capital Management	4,400	$5,016

Filter: New 30 Increased 19 Reduced 2 Sold out 10 Unchanged 5

Showing 60 of 60

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$8,907,416

23.72%

2,999,130

RENAISSANCE TECHNOLOGIES LLC

$5,035,041

13.41%

1,695,300

MARSHALL WACE, LLP

$3,850,405

10.25%

1,296,433

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	1,296,433	$3,850,405	100.0%	Other

BlackRock, Inc.

$3,805,056

10.13%

1,281,164

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	14,296	$42,459	1.1%	Sole
BlackRock Fund Advisors	212,062	$629,824	16.6%	Sole
BlackRock Institutional Trust Company, N.A.	1,054,581	$3,132,105	82.3%	Sole
Aperio Group, LLC	225	$668	0.0%	Sole

TUDOR INVESTMENT CORP ET AL

$2,430,900

6.47%

818,485

GEODE CAPITAL MANAGEMENT, LLC

$2,279,352

6.07%

767,459

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	167,608	$497,795	21.8%	Defined
Held directly	599,851	$1,781,557	78.2%	Defined

UBS Group AG

$1,919,326

5.11%

646,238

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	611,938	$1,817,455	94.7%	Defined
UBS Switzerland AG	34,300	$101,871	5.3%	Defined

VANGUARD FIDUCIARY TRUST CO

$1,238,243

3.30%

416,917

STATE STREET CORP

$1,048,674

2.79%

353,089

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	353,089	$1,048,674	100.0%	Defined

Informed Momentum Co LLC

$716,500

1.91%

241,246

XTX Topco Ltd

$489,209

1.30%

164,717

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	164,717	$489,209	100.0%	Defined

NORTHERN TRUST CORP

$461,377

1.23%

155,346

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	155,346	$461,377	100.0%	Defined

Robertson Stephens Wealth Management, LLC

$445,500

1.19%

150,000

SEI INVESTMENTS CO

$424,415

1.13%

142,901

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	142,901	$424,415	100.0%	Sole

JANE STREET GROUP, LLC

$395,252

1.05%

133,082

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	133,079	$395,244	100.0%	Defined
Jane Street Global Trading, LLC	3	$8	0.0%	Defined

Team Hewins, LLC

$373,150

0.99%

125,640

GOLDMAN SACHS GROUP INC

$335,125

0.89%

112,837

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	112,837	$335,125	100.0%	Defined

ExodusPoint Capital Management, LP

$262,960

0.70%

88,539

CITADEL ADVISORS LLC

$229,188

0.61%

77,168

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	17,616	$52,319	22.8%	Defined
Held directly	59,552	$176,869	77.2%	Defined

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$222,750

0.59%

75,000

Caitong International Asset Management Co., Ltd

$195,476

0.52%

65,817

Focus Partners Wealth

$190,080

0.51%

64,000

BANK OF AMERICA CORP /DE/

$187,597

0.50%

63,164

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	63,164	$187,597	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$174,377

0.46%

58,713

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	20,283	$60,240	34.5%	Other
G1 EXECUTION SERVICES, LLC	38,430	$114,137	65.5%	Other

BRC Group Holdings, Inc.

$168,749

0.45%

56,818

INDEPENDENT FINANCIAL GROUP, LLC

$146,272

0.39%

49,250

ROYAL BANK OF CANADA

$146,162

0.39%

49,213

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	9,213	$27,362	18.7%	Defined
RBC Dominion Securities Inc.	40,000	$118,800	81.3%	Defined

MORGAN STANLEY

$129,289

0.34%

43,532

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY CAPITAL SERVICES, LLC	24,243	$72,001	55.7%	Defined
MORGAN STANLEY SMITH BARNEY LLC	19,289	$57,288	44.3%	Defined

Jefferies Financial Group Inc.

$117,018

0.31%

39,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JEFFERIES LLC	39,400	$117,018	100.0%	Defined

Spark Investment Management LLC

$110,187

0.29%

37,100

MILLENNIUM MANAGEMENT LLC

$94,909

0.25%

31,956

CITIGROUP INC

$94,579

0.25%

31,845

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	31,845	$94,579	100.0%	Defined

TWO SIGMA INVESTMENTS, LP

$94,238

0.25%

31,730

CITADEL ADVISORS LLC

$89,991

0.24%

30,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	30,300	$89,991	100.0%	Defined

Engineers Gate Manager LP

$89,836

0.24%

30,248

Vanguard Global Advisers, LLC

$82,040

0.22%

27,623

AXQ CAPITAL, LP

$76,917

0.20%

25,898

LPL Financial LLC

$62,176

0.17%

20,935

Braeburn Wealth Management LLC

$46,035

0.12%

15,500

Rockefeller Capital Management L.P.

$44,550

0.12%

15,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER FINANCIAL LLC	15,000	$44,550	100.0%	Defined

JANE STREET GROUP, LLC

$43,659

0.12%

14,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	14,700	$43,659	100.0%	Defined

JANE STREET GROUP, LLC

$42,174

0.11%

14,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	14,200	$42,174	100.0%	Defined

StoneX Group Inc.

$38,119

0.10%

12,835

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STONEX FINANCIAL INC.	12,835	$38,119	100.0%	Defined

CITADEL ADVISORS LLC

$38,016

0.10%

12,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	12,800	$38,016	100.0%	Defined

Bank of New York Mellon Corp

$37,643

0.10%

12,675

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
The Bank of New York Mellon	12,674	$37,641	100.0%	Defined
Held directly	1	$2	0.0%	Defined

IMC-Chicago, LLC

$31,779

0.08%

10,700

BARCLAYS PLC

$21,057

0.06%

7,090

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	7,090	$21,057	100.0%	Defined

SIMPLEX TRADING, LLC

$20,932

0.06%

7,048

JPMORGAN CHASE & CO

$18,452

0.05%

6,213

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	6,027	$17,900	97.0%	Defined
J.P. Morgan Securities plc	186	$552	3.0%	Defined

FMR LLC

$11,042

0.03%

3,718

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STRATEGIC ADVISERS LLC	3,718	$11,042	100.0%	Defined

OSAIC HOLDINGS, INC.

$10,098

0.03%

3,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	1,400	$4,158	41.2%	Defined
Osaic Advisory Services, LLC	2,000	$5,940	58.8%	Defined

Russell Investments Group, Ltd.

$9,720

0.03%

3,273

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	3,273	$9,720	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$6,534

0.02%

2,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	2,200	$6,534	100.0%	Sole

SBI Securities Co., Ltd.

$3,311

0.01%

1,115

Quarry LP

$3,076

0.01%

1,036

BNP PARIBAS ARBITRAGE, SA

$1,716

0.00%

578

Avion Wealth

$454

0.00%

153

Arax Advisory Partners

$252

0.00%

KERR FINANCIAL PLANNING Corp

$29

0.00%

HARBOUR INVESTMENTS, INC. CNDB

—

100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	2,286	$2,606	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	115	$131	100.0%	Defined

Key facts CIK 1851961 CUSIP 36170N107 13F (30d) 20 filings 20 filers Visit website Investor relations