GCT Semiconductor Holding, Inc. (GCTS) insider trading.
In Q3 2026, insiders at GCT Semiconductor Holding, Inc. reported 10 non-derivative transactions on 10 Forms 3, 4 and 5: 0 open-market purchases and 0 sales.
- Transactions
- 10
- Purchases (P)
- 0
- Sales (S)
- 0
- Net shares, P minus S
- 0
- Insiders
- 10
- Last filed
- 2026-09-14
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Cheng Edmond | Officer · Chief Financial Officer | 1 | 0 | 0 |
| Kim Jeong-Min | Officer · Chief Technology Officer | 1 | 0 | 0 |
| Schlaefer John | Director, Officer · President, CEO & Class III Dir | 1 | 0 | 0 |
| Sum Alex | Officer · Sr. VP of Sales and Marketing | 1 | 0 | 0 |
| Tuder Jeffrey | Director, Other | 1 | 0 | 0 |
| Shin Hyunsoo | Director, Other | 1 | 0 | 0 |
| Lee Kyeongho | Director, Other | 1 | 0 | 0 |
| Chan Nelson | Director, Other | 1 | 0 | 0 |
| Chun Kukjin | Director, Other | 1 | 0 | 0 |
| Barker Robert | Director, Other | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-10 | Cheng Edmond | A (A) | 145,000 | $0 | 296,000 | Form 4 |
| 2026-09-10 | Kim Jeong-Min | A (A) | 100,000 | $0 | 402,701 | Form 4 |
| 2026-09-10 | Schlaefer John | A (A) | 150,000 | $0 | 352,728 | Form 4 |
| 2026-09-10 | Sum Alex | A (A) | 75,000 | $0 | 258,743 | Form 4 |
| 2026-06-30 | Tuder Jeffrey | A (A) | 9,259 | $0 | 151,190 | Form 4 |
| 2026-06-30 | Shin Hyunsoo | A (A) | 9,259 | $0 | 814,068 | Form 4 |
| 2026-06-30 | Lee Kyeongho | A (A) | 9,259 | $0 | 1,096,122 | Form 4 |
| 2026-06-30 | Chan Nelson | A (A) | 9,259 | $0 | 134,901 | Form 4 |
| 2026-06-30 | Chun Kukjin | A (A) | 9,259 | $0 | 98,636 | Form 4 |
| 2026-06-30 | Barker Robert | A (A) | 9,259 | $0 | 151,710 | Form 4 |
Transaction codes in this quarter
Get GCTS insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1851961&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · GCTS company page · GCT Semiconductor Holding, Inc. on SEC.gov
Questions
Are insiders buying or selling GCT Semiconductor Holding, Inc. (GCTS)?
In Q3 2026, insiders at GCT Semiconductor Holding, Inc. reported 10 non-derivative transactions on 10 Forms 3, 4 and 5: 0 open-market purchases and 0 sales. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these GCT Semiconductor Holding, Inc. insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/gcts.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.