GCT Semiconductor Holding, Inc.

Semiconductors & Related Devices

GCTS Semiconductors & Electronic Components People in Semiconductors & Electronic Components SEC CIK 0001851961 ↗

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Market capitalisation
$175.66M
91,969,726 shares Covers all 2 share classes this company has on file.
Insiders on file
4
people who have filed Form 3, 4 or 5 naming this issuer
Value of insider-held stock
$3.65M
from the holdings reported on Forms 3/4/5; this figure has no separate as-of date on file
Insider-held share of market cap
2.08%
insider-held value divided by market capitalisation

What GCT Semiconductor Holding, Inc. reports

Revenue and net income below are for fiscal period FY2025, the period label carried by this company’s own annual XBRL filings to the SEC. Fiscal years do not line up between companies — one company’s FY2026 can cover much the same months as another’s FY2025 — so compare the periods, not just the numbers.

Revenue
$2.87M
FY2025 annual revenue, from this company’s own annual XBRL filings to the SEC
Net income
-$43.37M
FY2025 a loss for the period, from this company’s own annual XBRL filings to the SEC
Employees
126
Yahoo Finance
Where the employee count comes from

Headcount comes from Yahoo Finance, not from a filing. The date beside it is the day we retrieved the figure — it is not the date the company counted its staff, and Yahoo does not publish that date. Unlike the SEC filings behind the other figures on this page, this one carries no open licence, so we publish the number and nothing else from that source.

Insiders at GCT Semiconductor Holding, Inc.

Shares is what each person last reported holding here.

Everyone below has filed at least one insider report against this company.

Value is that share count priced at the same closing price used everywhere else on this site. A row priced from only some of a person’s securities says so — we do not quietly present a partial sum as a complete one.

Rows are grouped by the role each person reports.

The role comes from the relationship boxes a person ticks on their own insider filings — officer, director, ten per cent owner — not from anything we infer. Somebody who is both an officer and a director appears once, in the combined group, so the row count still matches the figure at the top of this page. Where no filing states a role we say so instead of guessing one.

People who file insider reports against GCT Semiconductor Holding, Inc..
Insider Reported role Shares Value Last action
Officers who also sit on the board 2
Hyunsoo Shin Other Executive 780,687 $1.38M A Grant or award Jun 30, 2026 position reported
Jeffrey Tuder CFO 117,809 $208.5K A Grant or award Jun 30, 2026 position reported
Directors 2
Kyeongho Lee Board Member 1,062,741 $1.88M A Grant or award Jun 30, 2026 position reported
Nelson Chan Board Member 101,520 $179.7K A Grant or award Jun 30, 2026 position reported

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

Hyunsoo Shin bought 86,000 GCT Semiconductor Holding, Inc. (GCTS) shares for $101,480 on May 20, 2025

Unusual change in a direct holding

Flagged because the change that day in the shares this person holds directly was unusually large compared with their own earlier changes. The rows below are the open-market trades reported that day; under each share count is the balance the filing reports after that line.

Hyunsoo Shin bought 86,000 GCT Semiconductor Holding, Inc. (GCTS) shares for $101,480 on May 20, 2025
Date Insider Transaction Shares Price Value Filing
May 20, 2025 Hyunsoo Shin P Open-market purchase 86,000 held after: 170,248 $1.18 $101,480 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Recent insider transactions

Of the 56 rows we hold, 14 are open-market purchases (P) and 0 open-market sales — the only codes we count as buying or selling.

The rest — awards, shares withheld to pay tax, option exercises, gifts and so on — follow from an employment contract or a transfer arranged off-market, not from a decision to buy or sell, so counting them would turn this into a pay table.

A price of 0.00 is a real reported figure on gifts (G) and share awards (A) — not a gap in our data.

Insider transactions disclosed to the SEC for GCT Semiconductor Holding, Inc., newest first, each with the filing behind it.
Date Insider Transaction Shares Price Value Filing
Jun 30, 2026 Jeffrey Tuder A Grant or award 9,259 $0.00 $0 SEC filing ↗
Jun 30, 2026 Nelson Chan A Grant or award 9,259 $0.00 $0 SEC filing ↗
Jun 30, 2026 Kyeongho Lee A Grant or award 9,259 $0.00 $0 SEC filing ↗
Jun 30, 2026 Hyunsoo Shin A Grant or award 9,259 $0.00 $0 SEC filing ↗
Mar 31, 2026 Jeffrey Tuder A Grant or award 24,122 $0.00 $0 SEC filing ↗
Mar 31, 2026 Kyeongho Lee A Grant or award 24,122 $0.00 $0 SEC filing ↗
Mar 31, 2026 Nelson Chan A Grant or award 24,122 $0.00 $0 SEC filing ↗
Mar 31, 2026 Hyunsoo Shin A Grant or award 24,122 $0.00 $0 SEC filing ↗
Dec 31, 2025 Hyunsoo Shin A Grant or award 22,916 $0.00 $0 SEC filing ↗
Dec 31, 2025 Jeffrey Tuder A Grant or award 22,916 $0.00 $0 SEC filing ↗
Dec 31, 2025 Kyeongho Lee A Grant or award 22,916 $0.00 $0 SEC filing ↗
Dec 31, 2025 Nelson Chan A Grant or award 22,916 $0.00 $0 SEC filing ↗
Nov 25, 2025 Hyunsoo Shin P Open-market purchase 16,725 $1.28 $21.4K SEC filing ↗
Nov 21, 2025 Hyunsoo Shin P Open-market purchase 3,180 $1.28 $4.1K SEC filing ↗
Nov 20, 2025 Hyunsoo Shin P Open-market purchase 25,453 $1.28 $32.6K SEC filing ↗
Sep 30, 2025 Hyunsoo Shin A Grant or award 18,092 $0.00 $0 SEC filing ↗
Sep 30, 2025 Jeffrey Tuder A Grant or award 18,092 $0.00 $0 SEC filing ↗
Sep 30, 2025 Kyeongho Lee A Grant or award 18,092 $0.00 $0 SEC filing ↗
Sep 30, 2025 Nelson Chan A Grant or award 18,092 $0.00 $0 SEC filing ↗
Sep 12, 2025 Hyunsoo Shin P Open-market purchase 44,067 $1.51 $66.5K SEC filing ↗
Sep 5, 2025 Hyunsoo Shin P Open-market purchase 10,300 $1.30 $13.4K SEC filing ↗
Sep 4, 2025 Hyunsoo Shin P Open-market purchase 8,250 $1.26 $10.4K SEC filing ↗
Aug 15, 2025 Hyunsoo Shin P Open-market purchase 121,000 $1.26 $152.5K SEC filing ↗
Jun 30, 2025 Hyunsoo Shin A Grant or award 18,456 $0.00 $0 SEC filing ↗
Jun 30, 2025 Jeffrey Tuder A Grant or award 18,456 $0.00 $0 SEC filing ↗

From SEC Form 4 filings. Every row links to the filing it came from. How we calculate this.

What a Form 4 is

The report an officer, director or large shareholder must file after trading their own company’s stock.

Corporate ownership links — 2 filers hold a position

Who owns GCT Semiconductor Holding, Inc.

Each row is one filer naming this company.

Funds, trusts and other companies file the same ownership forms that executives do. Everything below is taken from those filings, with the position exactly as the filing states it.

Filers holding a position in GCT Semiconductor Holding, Inc.

Funds, trusts and companies that disclose an ownership position in GCT Semiconductor Holding, Inc..
Owner Reported role Shares Filed
Anapass, Inc. TenPercentOwner 8,017,466
Concord Sponsor Group III LLC TenPercentOwner 632,586

See the full ownership map — every entity that files as an owner of a US public company.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Sources and technical notes

Every figure on this page comes from filings to the U.S. SEC via EDGAR. Nothing here is estimated, and nothing is taken from press coverage or company websites.

Share count: cover page of the latest filing (dei:EntityCommonStockSharesOutstanding), taken from GCT Semiconductor Holding, Inc.’s own filings and multiplied by our closing price. Full method.

What that share count means

the share count the company itself prints on the cover of its most recent filing, as of the date it signed that filing.

We do not take a market cap from a data vendor, and we do not estimate one: the figure is a share count from GCT Semiconductor Holding, Inc.’s own SEC filings multiplied by the closing price we hold for the same stock.