John Schlaefer
President, CEO & Class III Dir at GCT Semiconductor Holding Inc.
Sits on 1 board. Last updated September 27, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 3 years
- Director since
- 2024
3 years of board service in total across 1 board, counting each seat separately. Longest: GCT Semiconductor Holding Inc., 2 years.
GCT Semiconductor Holding Inc.
Director · President, CEO & Class III Dir
Chief executive roles
GCT Semiconductor Holding Inc.
· President, CEO & Class III Dir
Since March 2024
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 10, 2026 | GCT Semiconductor Holding Inc. | Grant or award | +150,000 | — | — |
| Sep 26, 2025 | GCT Semiconductor Holding Inc. | Other | +555 | — | — |
| Sep 19, 2025 | GCT Semiconductor Holding Inc. | Grant or award | +75,000 | — | — |
| Jan 13, 2025 | GCT Semiconductor Holding Inc. | Option exercise | +35,669 | $0.11 | $3,924 |
| Mar 26, 2024 | GCT Semiconductor Holding Inc. | Grant or award | +78,700 | — | — |
| Mar 26, 2024 | GCT Semiconductor Holding Inc. | Grant or award | +12,804 | — | — |
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