GCT Semiconductor (GCTS-WT) Stock: Why It's Down Today
Updated Oct 19, 2026, 4:00 PM ET · closing price
- Closed at $0.21, -25.00% vs the prior close of $0.28.
- Volume 70.50K shares, 8.8x its 50-day average (heavy).
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
GCTS-WT slides 25.0% to $0.21 on 8.8x normal volume. Closed at $0.21, -25.00% vs the prior close of $0.28. Day range $0.21–$0.24, opened at $0.00.
GCTS-WT daily analysis — what happened
A plain-English, data-only note for every US trading day (today's note updates every 2 hours while the market is open). Newest first; older days stay archived below.
Oct 19, 2026 — GCTS-WT slides 25.0% to $0.21 on 8.8x normal volume
- Closed at $0.21, -25.00% vs the prior close of $0.28. Day range $0.21–$0.24, opened at $0.00.
- Volume was 70.50K shares, 8.8x its 50-day average of 8.01K — unusually heavy trading.
- 52-week range $0.21–$0.28; today's close sits at 6% of that range, 25.0% below the 52-week high.
GCTS-WT bull case vs bear case (from the data)
- Insiders made 12 open-market purchases in the last 12 months.
- Annual revenue fell 68.6% in the latest fiscal year (SEC XBRL).
- Latest fiscal-year net income: loss of $43.37M.
- Share count up 64.6% in a year (dilution).
- High volatility: average daily move of 25.0% over 20 sessions.
- Thin trading (under $2M a day on average) can mean wide bid/ask spreads.
GCTS-WT latest news & SEC filings
Every SEC filing by or about GCTS-WT in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Lee Kyeongho received an award of 12,971 shares on Sep 30, 2026; now holds 1,109,093
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Barker Robert received an award of 12,971 shares on Sep 30, 2026; now holds 164,681
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Tuder Jeffrey received an award of 12,971 shares on Sep 30, 2026; now holds 164,161
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Chan Nelson received an award of 12,971 shares on Sep 30, 2026; now holds 147,872
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Chun Kukjin received an award of 12,971 shares on Sep 30, 2026; now holds 111,607
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 2, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Shin Hyunsoo received an award of 12,971 shares on Sep 30, 2026; now holds 827,039
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 18, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.07 — Reported shareholder vote results.
Sep 15, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.02 — Change in directors or officers (appointment, departure or pay).
Aug 10, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Aug 10, 2026 · Form 10-Q — Quarterly report
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $971.00K (prior year $1.18M) (-17.9% vs Jun 30, 2025)
- Net income: -$20.38M (prior year -$13.54M) (loss widened vs Jun 30, 2025)
- Diluted EPS: -$0.25 (prior year -$0.26) (loss narrowed vs Jun 30, 2025)
Aug 3, 2026 · Form ARS — Annual report to shareholders
Annual report to shareholders
Aug 3, 2026 · Form DEFA14A — Additional proxy materials
Additional proxy materials
Aug 3, 2026 · Form DEF 14A — Proxy statement
Proxy statement — agenda for the shareholder meeting (board elections, executive pay, votes)
Things to know before you trade GCTS-WT
- Last results release: Aug 10, 2026 (8-K Item 2.02). Previous ones: Jun 18, 2026, May 12, 2026, Mar 25, 2026. Based on that rhythm, the next report is likely around Nov 9, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 25.00% (largest 25.0%). That is a volatile stock.
- Liquidity: about 39.26K shares (≈$8.24K) trade per day on average. Thin volume can mean wider bid/ask spreads.
- 52-week position: $0.21 vs a range of $0.21–$0.28 (6% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 12 open-market buys, 0 sales; latest: Hyunsoo Shin bought 16,725 shares on Nov 25, 2025.
- Latest filings: 8-K Sep 18, 2026; 8-K Sep 15, 2026; 8-K Aug 10, 2026.
- Share count: 91.97M shares outstanding (Aug 6, 2026), +64.6% vs a year earlier — notable dilution.
- Listing: NYSE · industry: Semiconductors & Related Devices.
GCTS-WT market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 19, 2026 | 0.00 | 0.24 | 0.21 | 0.21 | 70.50K |
| Oct 16, 2026 | 0.00 | 0.28 | 0.26 | 0.28 | 8.01K |
About GCT Semiconductor
GCT Semiconductor (GCTS-WT) is listed on the NYSE and classified by the SEC under “Semiconductors & Related Devices”. Its business address is in SAN JOSE, CA. State of incorporation: DE. Fiscal year ends December 31. SEC CIK 1851961.
GCTS-WT board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Robert Barker | Class II Director | Jul 2, 2026 |
| Nelson Chan | Class I Director | Jul 2, 2026 |
| Kukjin Chun | Class I Director | Jul 2, 2026 |
| Kyeongho Lee | Chairman & Class III Director | Jul 2, 2026 |
| John Schlaefer | President, CEO & Class III Dir | Sep 14, 2026 |
| Hyunsoo Shin | Class II Director | Jul 2, 2026 |
| Jeffrey Tuder | Class III Director | Jul 7, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Edmond Cheng | Chief Financial Officer | Sep 14, 2026 |
| Jeong-Min Kim | Chief Technology Officer | Sep 14, 2026 |
| John Schlaefer | President, CEO & Class III Dir | Sep 14, 2026 |
| Alex Sum | Sr. VP of Sales and Marketing | Sep 14, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Nov 25, 2025 | Hyunsoo Shin | Buy | 16,725 | $1.28 |
| Nov 25, 2025 | Hyunsoo Shin | Buy | 16,725 | $1.28 |
| Nov 25, 2025 | Hyunsoo Shin | Buy | 16,725 | $1.28 |
| Nov 25, 2025 | Hyunsoo Shin | Buy | 16,725 | $1.28 |
| Nov 21, 2025 | Hyunsoo Shin | Buy | 3,180 | $1.28 |
| Nov 21, 2025 | Hyunsoo Shin | Buy | 3,180 | $1.28 |
| Nov 21, 2025 | Hyunsoo Shin | Buy | 3,180 | $1.28 |
| Nov 21, 2025 | Hyunsoo Shin | Buy | 3,180 | $1.28 |
| Nov 20, 2025 | Hyunsoo Shin | Buy | 25,453 | $1.28 |
| Nov 20, 2025 | Hyunsoo Shin | Buy | 25,453 | $1.28 |
| Nov 20, 2025 | Hyunsoo Shin | Buy | 25,453 | $1.28 |
| Nov 20, 2025 | Hyunsoo Shin | Buy | 25,453 | $1.28 |
GCTS-WT financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $2.87M | $-43.37M | -0.82 | $-30.68M |
| Dec 31, 2024 | $9.13M | $-12.38M | -0.30 | $-30.96M |
| Dec 31, 2023 | $16.03M | $-22.47M | -0.94 | $-8.83M |
| Dec 31, 2022 | — | $24.26M | — | $-1.52M |
| Dec 31, 2021 | — | $9.17M | — | $-854.87K |
Latest balance sheet: total assets $49.83M, total liabilities $101.85M, cash $30.23M (as of Jun 30, 2026).
GCTS-WT earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 10, 2026 | 8-K Item 2.02 (results) | — |
| Jun 18, 2026 | 8-K Item 2.02 (results) | — |
| May 12, 2026 | 8-K Item 2.02 (results) | — |
| Mar 25, 2026 | 8-K Item 2.02 (results) | — |
| Nov 12, 2025 | 8-K Item 2.02 (results) | — |
| Aug 12, 2025 | 8-K Item 2.02 (results) | — |
| May 14, 2025 | 8-K Item 2.02 (results) | — |
| Mar 25, 2025 | 8-K Item 2.02 (results) | — |
| Nov 14, 2024 | 8-K Item 2.02 (results) | — |
| Aug 14, 2024 | 8-K Item 2.02 (results) | — |
| May 14, 2024 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 19, 2026, 4:00 PM ET. Filings: SEC EDGAR. Refreshed every 2 hours during US market hours.