Company · CIK 0001851961 · SIC 3674 — Semiconductors & Related Devices · NYSE
GCT Semiconductor Holding, Inc. · GCTS
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 10, 2026 AForm 4 → | Sep 14, 4:32 pm EDT | Alex SumSr. VP of Sales and Marketing | 75,000 | — | — | 258,743 | — | |
| Sep 10, 2026 AForm 4 → | Sep 14, 4:30 pm EDT | John SchlaeferPresident, CEO & Class III Dir, Director | 150,000 | — | — | 352,728 | — | |
| Sep 10, 2026 AForm 4 → | Sep 14, 4:28 pm EDT | Jeong-Min KimChief Technology Officer | 100,000 | — | — | 402,701 | — | |
| Sep 10, 2026 AForm 4 → | Sep 14, 4:25 pm EDT | Edmond ChengChief Financial Officer | 145,000 | — | — | 296,000 | — | |
| Jun 30, 2026 AForm 4 → | Jul 7, 4:03 pm EDT | Jeffrey TuderDirector | 9,259 | — | — | 151,190 | — | late |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:52 pm EDT | Robert BarkerDirector | 9,259 | — | — | 151,710 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:51 pm EDT | Kukjin ChunDirector | 9,259 | — | — | 98,636 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:49 pm EDT | Nelson ChanDirector | 9,259 | — | — | 134,901 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:48 pm EDT | Kyeongho LeeDirector | 9,259 | — | — | 1,096,122 | — | |
| Jun 30, 2026 AForm 4 → | Jul 2, 4:46 pm EDT | Hyunsoo ShinDirector | 9,259 | — | — | 814,068 | — |
Reported at this company — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.