GCT Semiconductor Holding, Inc.: which funds bought and sold

Institutions that bought and sold GCT Semiconductor Holding shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 47 institutions that filed 13F reports for both quarters added to or opened positions in GCT Semiconductor Holding, and 8 cut or closed them. Together they added a net 8.6M shares, +213.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 4.0M shares (+2440.2%); index fund managers were net buyers of 2.6M shares (+77.4%). 28 opened a new position and 6 sold out entirely.

Bought, Q2 2026 47 institutions, 28 of them new holders Sold, Q2 2026 8 institutions, 6 of them sold out

Net change, all compared +8.6M shares (+213.1%)

Net change, active managers +4.0M shares (+2440.2%), 9 bought, 2 sold

Buyers versus sellers

institutions compared, 60

47 bought 5 8 sold

Active managers and hedge funds 9 bought · 2 sold · +4.0M

Index fund managers 6 bought · 0 sold · +2.6M

Other institutions 32 bought · 6 sold · +2.0M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Renaissance Technologies LLC Hedge fund	+1.7M New position	1.7M	$5M
Marshall Wace, LLP Hedge fund	+1.3M New position	1.3M	$3.9M
Vanguard Capital Management LLC Index funds	+1.3M +71.9%	3.0M	$8.9M
Tudor Investment Corp Et Al Hedge fund	+818K New position	818K	$2.4M
Blackrock, Inc. Index funds	+683K +114.3%	1.3M	$3.8M
UBS Group AG	+609K +1629.6%	646K	$1.9M
Geode Capital Management, LLC Index funds	+293K +61.8%	767K	$2.3M
Informed Momentum Co LLC	+241K New position	241K	$716,501
Vanguard Fiduciary Trust Co Index funds	+171K +69.3%	417K	$1.2M
Robertson Stephens Wealth Management, LLC	+150K New position	150K	$445,500
Sei Investments Co	+143K New position	143K	$424,416
Xtx Topco Ltd	+139K +541.4%	165K	$489,209
Jane Street Group, LLC	+133K New position	133K	$395,254
State Street Corp Index funds	+113K +46.8%	353K	$1M
Northern Trust Corp Index funds	+93K +147.8%	155K	$461,378
Exoduspoint Capital Management, LP Hedge fund	+89K New position	89K	$262,961
Citadel Advisors LLC Hedge fund	+77K New position	77K	$229,189
Caitong International Asset Management Co., Ltd	+66K +346305.3%	66K	$195,476
Focus Partners Wealth	+64K New position	64K	$190,080
Susquehanna International Group, LLP	+59K New position	59K	$174,378

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Renaissance Technologies LLC Hedge fund	+1.7M New position	1.7M	$5M
Marshall Wace, LLP Hedge fund	+1.3M New position	1.3M	$3.9M
Tudor Investment Corp Et Al Hedge fund	+818K New position	818K	$2.4M
Exoduspoint Capital Management, LP Hedge fund	+89K New position	89K	$262,961
Citadel Advisors LLC Hedge fund	+77K New position	77K	$229,189
Millennium Management LLC Hedge fund	+32K New position	32K	$94,909
Two Sigma Investments, LP Hedge fund	+32K New position	32K	$94,238
Engineers Gate Manager LP Hedge fund	+6,732 +28.6%	30K	$89,837
FMR LLC Active manager	+3,718 New position	3,718	$11,042

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Point72 Asset Management, L.P. Hedge fund	−52K Sold out	0	—
HRT Financial LP	−36K Sold out	0	—
Schonfeld Strategic Advisors LLC Hedge fund	−13K Sold out	0	—
Mai Capital Management	−4,400 Sold out	0	—
Arax Advisory Partners	−3,040 −97.3%	85	$252
Tower Research Capital LLC (TRC)	−2,286 Sold out	0	—
Optiver Holding B.V.	−115 Sold out	0	—
BNP Paribas Financial Markets	−17 −2.9%	578	$1,717

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Point72 Asset Management, L.P. Hedge fund	−52K Sold out	0	—
Schonfeld Strategic Advisors LLC Hedge fund	−13K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Renaissance Technologies LLCHedge fund	1.7M	$5M
Marshall Wace, LLPHedge fund	1.3M	$3.9M
Tudor Investment Corp Et AlHedge fund	818K	$2.4M
Informed Momentum Co LLC	241K	$716,501
Robertson Stephens Wealth Management, LLC	150K	$445,500
Sei Investments Co	143K	$424,416
Jane Street Group, LLC	133K	$395,254
Exoduspoint Capital Management, LPHedge fund	89K	$262,961
Citadel Advisors LLCHedge fund	77K	$229,189
Focus Partners Wealth	64K	$190,080

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Point72 Asset Management, L.P.Hedge fund	52K	$58,829
HRT Financial LP	36K	$40,000
Schonfeld Strategic Advisors LLCHedge fund	13K	$15,047
Mai Capital Management	4,400	$5,016
Tower Research Capital LLC (TRC)	2,286	$2,606
Optiver Holding B.V.	115	$131

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 54
Ten largest holders: 83.7%
Index fund managers: 47.5%
Active managers and hedge funds: 33.0%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	9	2	8	2	+4.0M	+2440.2%
Index fund managers	6	0	0	0	+2.6M	+77.4%
Other institutions	32	6	20	4	+2.0M	+404.5%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on GCT Semiconductor Holding.

Only managers that filed a holdings report for both quarters are compared (60 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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