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 |
|---|---|---|---|---|---|---|
| 2026-09-30 | Lee Kyeongho Director | Grant or award | +12,971 | 1,109,093 | ||
| 2026-09-30 | Barker Robert Director | Grant or award | +12,971 | 164,681 | ||
| 2026-09-30 | TUDER JEFFREY Director | Grant or award | +12,971 | 164,161 | ||
| 2026-09-30 | Chan Nelson Director | Grant or award | +12,971 | 147,872 | ||
| 2026-09-30 | Chun Kukjin Director | Grant or award | +12,971 | 111,607 | ||
| 2026-09-30 | Shin Hyunsoo Director | Grant or award | +12,971 | 827,039 | ||
| 2026-09-10 | Sum Alex Sr. VP of Sales and Marketing | Grant or award | +75,000 | 258,743 | ||
| 2026-09-10 | Schlaefer John President, CEO & Class III Dir | Grant or award | +150,000 | 352,728 | ||
| 2026-09-10 | Kim Jeong-Min Chief Technology Officer | Grant or award | +100,000 | 402,701 | ||
| 2026-09-10 | Cheng Edmond Chief Financial Officer | Grant or award | +145,000 | 296,000 | ||
| 2026-06-30 | TUDER JEFFREY Director | Grant or award | +9,259 | 151,190 | ||
| 2026-06-30 | Barker Robert Director | Grant or award | +9,259 | 151,710 | ||
| 2026-06-30 | Chun Kukjin Director | Grant or award | +9,259 | 98,636 | ||
| 2026-06-30 | Chan Nelson Director | Grant or award | +9,259 | 134,901 | ||
| 2026-06-30 | Lee Kyeongho Director | Grant or award | +9,259 | 1,096,122 | ||
| 2026-06-30 | Shin Hyunsoo Director | Grant or award | +9,259 | 814,068 | ||
| 2026-03-31 | TUDER JEFFREY Director | Grant or award | +24,122 | 141,931 | ||
| 2026-03-31 | Lee Kyeongho Director | Grant or award | +24,122 | 1,086,863 | ||
| 2026-03-31 | Chan Nelson Director | Grant or award | +24,122 | 125,642 | ||
| 2026-03-31 | Chun Kukjin Director | Grant or award | +24,122 | 89,377 |
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