NYSETechnologySemiconductors & Related DevicesSAN JOSE, CA

GCT Semiconductor Holding, Inc. GCTS

Ask your AI

Estimated market cap $116.19M92.21M shares, shares as of Nov 6, 2026CIK 1851961

Insider trades, 12 mo

3 buys · 0 sells

$58.1K bought, open market

Congress trades, 24 mo

—

No disclosed trades

13F holders, Q3 2026

14.1% of shares · 15 added

13F holders

…

Lobbying, 12 mo

—

No lobbying filings

Federal contracts, 12 mo

—

None matched

Ask your AI:

Latest 10-Q

Q3 2026

What changed in GCT Semiconductor Holding, Inc.'s latest quarterly report, compared with the one before.

Filed Nov 12, 2026 · Quarter ended Sep 30, 2026

Compared with the 10-Q for the quarter ended Jun 30, 2026. Sections compared: management's discussion, risk factors, legal proceedings and controls and procedures.

Read the 10-Q on sec.gov ↗Filing index ↗

Latest 10-Q

What changed in GCT Semiconductor Holding, Inc.'s latest quarterly report, compared with the one before.

Loading…

Insider trades

3 in 12 mo

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

No open-market insider trades reported since Nov 25, 2025. Insiders have two business days to file.

Recent insider trades

Hyunsoo Shin Director	Nov 25, 2025 Form 4 ↗	Buy	+$21.4K 16,725 sh @ $1.28	-15.6%
Hyunsoo Shin Director	Nov 21, 2025 Form 4 ↗	Buy	+$4,070 3,180 sh @ $1.28	-18.3%
Hyunsoo Shin Director	Nov 20, 2025 Form 4 ↗	Buy	+$32.6K 25,453 sh @ $1.28	-21.6%
Hyunsoo Shin Director	Sep 12, 2025 Form 4 ↗	Buy	+$66.5K 44,067 sh @ $1.51	-31.3%
Hyunsoo Shin Director	Sep 5, 2025 Form 4 ↗	Buy	+$13.4K 10,300 sh @ $1.30	-21.1%

All GCTS insider trades →Planned sales (Form 144): see notices

Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.

Loading…

13F holders

13.04M shares

46 funds report GCTS. Values checked against market prices.

Funds own 14% of shares (Q2 2026)

55 funds hold the stock.

Q3 2026: 14% · 5,560 of ~8,900 funds reported so far

Q2 20257.5%
Q3 20256.7%
Q4 20256.8%
Q1 20266.1%
Q2 202614%
Q3 2026 (so far)14%

Q3 2026. 16 new, 15 added to, 7 trimmed, 25 exited since Q2 2026.

Top 13F holders
#
1	Vanguard Capital Management LLC 13F ↗	3.63M	$7.7M	+20.9%
2	Marshall Wace, LLP 13F ↗	3.56M	$7.6M	+174.8%
3	BlackRock, Inc. 13F ↗	1.33M	$2.8M	+3.8%
4	UBS Group AG 13F ↗	892,532	$1.9M	+38.1%
5	Geode Capital Management, LLC 13F ↗	811,007	$1.7M	+5.7%
6	Vanguard Fiduciary Trust Co 13F ↗	483,450	$1.0M	+16.0%
7	State Street Corp 13F ↗	343,589	$728.4K	-2.7%
8	Quantinno Capital Management LP 13F ↗	330,000	$699.6K	New
9	Larson Financial Group LLC 13F ↗	330,000	$699.6K	New
10	Team Hewins, LLC 13F ↗	125,640	$266.4K	unchanged

Download CSV Every fund that holds GCTS, not only these ten. A download holds at most 10,000 rows; narrow the filters to get a smaller slice.

13F holders

Funds that report this stock, checked against market prices.

Loading…

Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

No recent congressional trades for this company.

Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.

Loading…

Lobbying

What GCT Semiconductor Holding, Inc. and its lobbying firms report each quarter.

No recent lobbying filings for this company.

Lobbying

What GCT Semiconductor Holding, Inc. and its lobbying firms report each quarter.

Loading…

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

Funds holding the stock

Shares they report

Funds holding the stock by quarter

Q1 2024	8	—	495,834	$9.0M
Q2 2024	34	+26	2.96M	$14.6M
Q3 2024	41	+7	3.22M	$10.6M
Q4 2024	41	0	3.09M	$7.1M
Q1 2025	43	+2	3.58M	$5.9M
Q2 2025	31	-12	4.19M	$6.2M
Q3 2025	29	-2	3.84M	$5.8M
Q4 2025	24	-5	3.87M	$4.6M
Q1 2026	34	+10	4.45M	$5.1M
Q2 2026	55	+21	12.57M	$37.3M
Q3 2026	46	-9	13.04M	$27.6M

Each point is a quarter-end, from Q1 2024 to Q3 2026. A fund's 13F lists its long positions in US-listed securities as of the last day of the quarter and arrives up to 45 days later, so each point shows holdings at quarter-end, not on the day they were reported.

Common shares only; options and bonds are left out. When a fund amends a report, the amended version is the one counted.

The history follows the company's current CUSIP number (36170N107). If the company's shares were ever re-issued under a different CUSIP, the quarters before the change are not part of this series, so the first point (Q1 2024) can be later than the stock's first appearance in 13F reports.

Share counts are adjusted for stock splits; none took place between these quarters. Values are in dollars as reported at the time and are not adjusted.

A quarter appears once our daily update has built its summary. If a summary cannot be built, older reports are kept and the chart shows the quarters it has until the next update repairs it.

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

Loading…

More filings and data

Each opens the table.

Ownership stakes2 in 12 mo 8-K events3 in 90 days Patents1 patent granted Short interestFINRA · updated Oct 15 Planned insider salesNone in 12 mo Executive payNone on record Wikipedia attentionNone on record SEC enforcementNone on record IPO history3 registrations Ownership stakes…8-K events…Patents…Short interest…Planned insider sales…Executive pay…Wikipedia attention…SEC enforcement…

About the company

The basics from the company’s SEC registration.

Legal name: GCT Semiconductor Holding, Inc.
Address: 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE, CA 95131
Phone: 408-434-6040
Fiscal year ends: Dec 31
Filer category: Non-accelerated filer, smaller reporting company, emerging growth company
Incorporated in: DE
Listed as: GCTS (NYSE), GCTS-WT (NYSE)
Former names: Concord Acquisition Corp III (until 2024)
SEC filings: All filings on SEC EDGAR ↗

About the company

The basics from the company’s SEC registration.

Loading…

$1.26−$0.28 (−18.18%) Nov 13 close

1M3M1Y

Oct 13, 2026Low $1.02 · High $1.90Nov 13, 2026

Aug 13, 2026Low $1.02 · High $2.25Nov 13, 2026

Nov 13, 2025Low $0.9897 · High $3.73Nov 13, 2026

Congress purchase Congress sale Insider sale over $1M

Adjusted for stock splits; not for dividends. Where prices come from.

Live chart

Intraday and historical prices from TradingView. Quotes may be delayed.

Loading chart…

Information, not investment advice. Company matching is automatic; check the source before relying on one row.