CIK 0001851961 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company
GCT Semiconductor Holding, Inc.
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- GCTS
- Exchange
- NYSE
- Industry
- Semiconductors & Related Devices
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 862171699
- Phone
- 408-434-6040
- Business address
- 2290 NORTH 1ST STREET, SUITE 201, SAN JOSE, CA, 95131
- Former names
- Concord Acquisition Corp III
Securities
- GCTS GCT Semiconductor Holding, Inc. Common Stock NYSE
- GCTS-WT Warrants NYSE
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $0
- in 0 filings
Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Reading 6 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-03-31 | Barker Robert Director | Grant or award | +24,122 | 142,451 | ||
| 2026-03-31 | Shin Hyunsoo Director | Grant or award | +24,122 | 804,809 | ||
| 2026-02-23 | Chun Kukjin Director | Gift | −40,000 | 65,255 | ||
| 2025-12-31 | TUDER JEFFREY Director | Grant or award | +22,916 | 117,809 | ||
| 2025-12-31 | Barker Robert Director | Grant or award | +22,916 | 118,329 | ||
| 2025-12-31 | Chan Nelson Director | Grant or award | +22,916 | 101,520 | ||
| 2025-12-31 | Chun Kukjin Director | Grant or award | +22,916 | 105,255 | ||
| 2025-12-31 | Lee Kyeongho Director | Grant or award | +22,916 | 1,062,741 | ||
| 2025-12-31 | Shin Hyunsoo Director | Grant or award | +22,916 | 780,687 | ||
| 2025-11-25 | Shin Hyunsoo Director | Purchase | +16,725 | $1.28 | $21K | 757,771 |
| 2025-11-21 | Shin Hyunsoo Director | Purchase | +3,180 | $1.28 | $4K | 741,046 |
| 2025-11-20 | Shin Hyunsoo Director | Purchase | +25,453 | $1.28 | $33K | 737,866 |
| 2025-09-30 | TUDER JEFFREY Director | Grant or award | +18,092 | 94,893 | ||
| 2025-09-30 | Shin Hyunsoo Director | Grant or award | +18,092 | 712,413 | ||
| 2025-09-30 | Lee Kyeongho Director | Grant or award | +18,092 | 1,039,825 | ||
| 2025-09-30 | Chun Kukjin Director | Grant or award | +18,092 | 82,339 | ||
| 2025-09-30 | Chan Nelson Director | Grant or award | +18,092 | 78,604 | ||
| 2025-09-30 | Barker Robert Director | Grant or award | +18,092 | 95,413 | ||
| 2025-09-26 | Schlaefer John President, CEO & Class III Dir | Other acquisition | +555 | 202,728 | ||
| 2025-09-19 | Kim Jeong-Min Chief Technology Officer | Grant or award | +75,000 | 302,701 |
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