GCT Semiconductor (GCTS)
Designs and sells wireless communications semiconductors for 5G, 4G, and cellular IoT.
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Designs, manufactures, and sells wireless communications semiconductors spanning 5G, 4G RF transceivers and modems, and cellular IoT chipsets. The fabless business combines San Jose commercial functions with South Korean design, development, and customer-support operations.
Designs, manufactures, and sells wireless communications semiconductors: 5G, 4.75G, 4.5G, and 4G RF transceivers and modems, plus cellular IoT chipsets. First 5G commercial shipments began in late 2025.
Sales, marketing, and accounting are managed from San Jose. Product design, development, and customer support are conducted through wholly owned South Korean subsidiaries, including an R&D center. That center is part of the product-development and customer-support footprint for its wireless-chip portfolio.
International offices and support extend to South Korea, China, Taiwan, and Japan. Operations depend on additional fundraising to sustain them continuously.
Company facts
Target rangeAs of Sep 21, 2026
Latest analyst notes
| Date | Firm | Action | Prior | Current |
|---|---|---|---|---|
| Dec 11, 2025 | H.C. Wainwright | Target | Target: — | Target: $3 |
EPSReportedEstimate
RevenueReportedEstimate
Balance sheet, Jun 30, 2026Cash & short-term investments $30.2M · Total debt $347.0K · Total assets $49.8M · Shareholders' equity −$52.0M
- Revenue
- $971.0K
- Operating income
- −$7.4M
- Net income
- −$20.4M
No dividends on record.
| Institutions | 13.67% | 12.57M shares | |
|---|---|---|---|
| 58 holders · as of Jun 30, 2026 | |||
| Insiders | 4.08% | 3.76M shares | |
| 10 holders · as of Sep 14, 2026 | |||
| Strategic holders | 0.69% | 632.6K shares | |
| 1 holder · as of Mar 28, 2025 | |||
| Other | 81.56% | 75.01M shares | |
| remainder | |||
91.97M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
Top shareholders13F · 13D/G · Form 4
| Holder | Stake | Shares | Date |
|---|---|---|---|
Vanguard Capital Management LLCInstitution | 3.26% | 3.00M | as of Jun 30, 2026 |
Renaissance Technologies LLCInstitution | 1.84% | 1.70M | as of Jun 30, 2026 |
Marshall Wace, LLPInstitution | 1.41% | 1.30M | as of Jun 30, 2026 |
BlackRock, Inc.Institution | 1.39% | 1.28M | as of Jun 30, 2026 |
Kyeongho LeeInsiderdirector, other: Chairman & Class III Director | 1.19% | 1.10M | filed Jul 2, 2026 |
Insider tradesForm 4
| Date | Insider | Role | Shares | Avg price |
|---|---|---|---|---|
| Nov 25, 2025 | Hyunsoo Shin | director, other: Class II Director | +16,725 | $1.28 |
| Nov 20, 2025 | Hyunsoo Shin | director, other: Class II Director | +25,453 | $1.28 |
| Nov 21, 2025 | Hyunsoo Shin | director, other: Class II Director | +3,180 | $1.28 |
