GCT Semiconductor (GCTS) Stock: Why It's Down Today
Updated Oct 19, 2026, 4:00 PM ET · closing price
- Closed at $1.51, -5.03% vs the prior close of $1.59.
- Volume 1.93M shares, 1.0x its 50-day average.
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
GCTS slides 5.0% to $1.51, a 3-month low, 7 down days in a row. Closed at $1.51, -5.03% vs the prior close of $1.59. Day range $1.51–$1.66, opened at $1.66.
GCTS 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 slides 5.0% to $1.51, a 3-month low, 7 down days in a row
- Closed at $1.51, -5.03% vs the prior close of $1.59. Day range $1.51–$1.66, opened at $1.66.
- Volume was 1.93M shares, 1.0x its 50-day average of 1.85M.
- Price is -23.6% vs its 50-day average ($1.98) and -16.6% vs its 200-day average ($1.81).
- 52-week range $0.95–$3.93; today's close sits at 19% of that range, 61.6% below the 52-week high.
- That makes 7 straight losses.
Oct 16, 2026 — GCTS slides 9.7% to $1.59, a 3-month low, 6 down days in a row
- Closed at $1.59, -9.66% vs the prior close of $1.76. Day range $1.58–$1.78, opened at $1.77.
- Volume was 2.51M shares, 1.3x its 50-day average of 1.87M.
- Price is -20.4% vs its 50-day average ($2.00) and -12.1% vs its 200-day average ($1.81).
- 52-week range $0.95–$3.93; today's close sits at 21% of that range, 59.5% below the 52-week high.
- That makes 6 straight losses.
Oct 15, 2026 — GCTS dips 0.6% to $1.76, a 1-month low, 5 down days in a row
- Closed at $1.76, -0.56% vs the prior close of $1.77. Day range $1.64–$1.77, opened at $1.69.
- Volume was 2.56M shares, 1.4x its 50-day average of 1.86M.
- Price is -12.6% vs its 50-day average ($2.01) and -2.6% vs its 200-day average ($1.81).
- 52-week range $0.95–$3.93; today's close sits at 27% of that range, 55.2% below the 52-week high.
- That makes 5 straight losses.
Oct 14, 2026 — GCTS slides 6.8% to $1.77, a 1-month low, 4 down days in a row
- Closed at $1.77, -6.84% vs the prior close of $1.90. Day range $1.75–$1.87, opened at $1.85.
- Volume was 1.81M shares, 1.0x its 50-day average of 1.89M.
- Price is -12.5% vs its 50-day average ($2.02) and -1.9% vs its 200-day average ($1.80).
- 52-week range $0.95–$3.93; today's close sits at 27% of that range, 55.0% below the 52-week high.
- That makes 4 straight losses.
Oct 13, 2026 — GCTS dips 1.6% to $1.90, 3 down days in a row
- Closed at $1.90, -1.55% vs the prior close of $1.93. Day range $1.86–$1.93, opened at $1.89.
- Volume was 1.31M shares, 0.7x its 50-day average of 1.92M.
- Price is -6.5% vs its 50-day average ($2.03) and +5.5% vs its 200-day average ($1.80).
- 52-week range $0.95–$3.93; today's close sits at 32% of that range, 51.7% below the 52-week high.
- That makes 3 straight losses.
Oct 12, 2026 — GCTS slides 4.5% to $1.93
- Closed at $1.93, -4.46% vs the prior close of $2.02. Day range $1.83–$1.98, opened at $1.98.
- Volume was 2.23M shares, 1.2x its 50-day average of 1.91M.
- Price is -5.2% vs its 50-day average ($2.03) and +7.4% vs its 200-day average ($1.80).
- 52-week range $0.95–$3.93; today's close sits at 33% of that range, 50.9% below the 52-week high.
Oct 9, 2026 — GCTS slides 3.8% to $2.02
- Closed at $2.02, -3.81% vs the prior close of $2.10. Day range $1.96–$2.19, opened at $2.12.
- Volume was 1.81M shares, 0.9x its 50-day average of 1.92M.
- Price is -0.7% vs its 50-day average ($2.03) and +12.6% vs its 200-day average ($1.79).
- 52-week range $0.95–$3.93; today's close sits at 36% of that range, 48.6% below the 52-week high.
Oct 8, 2026 — GCTS rises 1.9% to $2.10
- Closed at $2.10, +1.94% vs the prior close of $2.06. Day range $2.02–$2.13, opened at $2.05.
- Volume was 1.22M shares, 0.6x its 50-day average of 1.95M.
- Price is +3.4% vs its 50-day average ($2.03) and +17.3% vs its 200-day average ($1.79).
- 52-week range $0.95–$3.93; today's close sits at 38% of that range, 46.6% below the 52-week high.
Oct 7, 2026 — GCTS dips 2.8% to $2.06
- Closed at $2.06, -2.83% vs the prior close of $2.12. Day range $2.03–$2.09, opened at $2.08.
- Volume was 1.38M shares, 0.7x its 50-day average of 1.95M.
- Price is +1.8% vs its 50-day average ($2.02) and +15.4% vs its 200-day average ($1.79).
- 52-week range $0.95–$3.93; today's close sits at 37% of that range, 47.6% below the 52-week high.
Oct 6, 2026 — GCTS rises 1.4% to $2.12
- Closed at $2.12, +1.44% vs the prior close of $2.09. Day range $2.10–$2.21, opened at $2.13.
- Volume was 1.42M shares, 0.7x its 50-day average of 1.95M.
- Price is +4.9% vs its 50-day average ($2.02) and +18.9% vs its 200-day average ($1.78).
- 52-week range $0.95–$3.93; today's close sits at 39% of that range, 46.1% below the 52-week high.
Oct 5, 2026 — GCTS slides 7.1% to $2.09
- Closed at $2.09, -7.11% vs the prior close of $2.25. Day range $2.08–$2.24, opened at $2.22.
- Volume was 1.27M shares, 0.6x its 50-day average of 1.96M.
- Price is +3.6% vs its 50-day average ($2.02) and +17.5% vs its 200-day average ($1.78).
- 52-week range $0.95–$3.93; today's close sits at 38% of that range, 46.8% below the 52-week high.
Oct 2, 2026 — GCTS jumps 5.1% to $2.25, a 1-month high, 3 up days in a row
- Closed at $2.25, +5.14% vs the prior close of $2.14. Day range $2.20–$2.27, opened at $2.22.
- Volume was 1.53M shares, 0.8x its 50-day average of 1.96M.
- Price is +11.7% vs its 50-day average ($2.01) and +26.7% vs its 200-day average ($1.78).
- 52-week range $0.95–$3.93; today's close sits at 44% of that range, 42.7% below the 52-week high.
- That makes 3 straight gains.
GCTS bull case vs bear case (from the data)
- Insiders made 12 open-market purchases in the last 12 months.
- Price is -23.6% vs its 50-day average — short-term trend is down.
- Price is -16.6% vs its 200-day average — below the long-term trend line.
- 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 3.2% over 20 sessions.
GCTS latest news & SEC filings
Every SEC filing by or about GCTS 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
- 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 3.18% (largest 9.7%). That is a volatile stock.
- Liquidity: about 1.59M shares (≈$2.40M) trade per day on average.
- 52-week position: $1.51 vs a range of $0.95–$3.93 (19% 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 market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 19, 2026 | 1.66 | 1.66 | 1.51 | 1.51 | 1.93M |
| Oct 16, 2026 | 1.77 | 1.78 | 1.58 | 1.59 | 2.52M |
| Oct 15, 2026 | 1.69 | 1.77 | 1.64 | 1.76 | 2.59M |
| Oct 14, 2026 | 1.85 | 1.87 | 1.75 | 1.77 | 1.81M |
| Oct 13, 2026 | 1.89 | 1.93 | 1.86 | 1.90 | 1.31M |
| Oct 12, 2026 | 1.98 | 1.98 | 1.83 | 1.93 | 2.23M |
| Oct 9, 2026 | 2.12 | 2.19 | 1.96 | 2.02 | 1.81M |
| Oct 8, 2026 | 2.05 | 2.13 | 2.02 | 2.10 | 1.22M |
| Oct 7, 2026 | 2.08 | 2.09 | 2.03 | 2.06 | 1.38M |
| Oct 6, 2026 | 2.13 | 2.21 | 2.10 | 2.12 | 1.42M |
| Oct 5, 2026 | 2.22 | 2.24 | 2.08 | 2.09 | 1.27M |
| Oct 2, 2026 | 2.22 | 2.27 | 2.20 | 2.25 | 1.53M |
| Oct 1, 2026 | 2.13 | 2.14 | 2.02 | 2.14 | 1.29M |
| Sep 30, 2026 | 2.09 | 2.16 | 2.07 | 2.12 | 1.54M |
| Sep 29, 2026 | 2.21 | 2.22 | 2.09 | 2.11 | 1.33M |
| Sep 28, 2026 | 2.18 | 2.25 | 2.17 | 2.18 | 1.43M |
| Sep 25, 2026 | 2.25 | 2.27 | 2.16 | 2.23 | 931.10K |
| Sep 24, 2026 | 2.11 | 2.24 | 2.10 | 2.24 | 1.19M |
| Sep 23, 2026 | 2.20 | 2.23 | 2.14 | 2.16 | 1.23M |
| Sep 22, 2026 | 2.16 | 2.26 | 2.14 | 2.20 | 1.81M |
About GCT Semiconductor
GCT Semiconductor (GCTS) 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 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 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 earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 10, 2026 | 8-K Item 2.02 (results) | $2.45 |
| Jun 18, 2026 | 8-K Item 2.02 (results) | $3.18 |
| May 12, 2026 | 8-K Item 2.02 (results) | $1.63 |
| Mar 25, 2026 | 8-K Item 2.02 (results) | $1.30 |
| Nov 12, 2025 | 8-K Item 2.02 (results) | $1.45 |
| Aug 12, 2025 | 8-K Item 2.02 (results) | $1.33 |
| May 14, 2025 | 8-K Item 2.02 (results) | $2.20 |
| Mar 25, 2025 | 8-K Item 2.02 (results) | $2.09 |
| Nov 14, 2024 | 8-K Item 2.02 (results) | $2.65 |
| 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.