GCTS insider transaction filings
GCT Semiconductor Holding, Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-14. Screen GCTS transaction legs live →
Insider transaction summary — last 90 days
2026-06-25 to 2026-09-23, from the filings listed below: 10 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 10.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Insider | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|
| Barker Robert — Director | 1 | — | — | 1 |
| Chan Nelson — Director | 1 | — | — | 1 |
| Cheng Edmond — Chief Financial Officer | 1 | — | — | 1 |
| Chun Kukjin — Director | 1 | — | — | 1 |
| Kim Jeong-Min — Chief Technology Officer | 1 | — | — | 1 |
| Lee Kyeongho — Director | 1 | — | — | 1 |
| Schlaefer John — President, CEO & Class III Dir, Director | 1 | — | — | 1 |
| Shin Hyunsoo — Director | 1 | — | — | 1 |
| Sum Alex — Sr. VP of Sales and Marketing | 1 | — | — | 1 |
| TUDER JEFFREY — Director | 1 | — | — | 1 |
Recent Form 4 filings — GCT Semiconductor Holding, Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-14 | 4 | Kim Jeong-Min — Chief Technology Officer | Grant/award (A): 100,000 @ $0 | EDGAR |
| 2026-09-14 | 4 | Schlaefer John — President, CEO & Class III Dir, Director | Grant/award (A): 150,000 @ $0 | EDGAR |
| 2026-09-14 | 4 | Sum Alex — Sr. VP of Sales and Marketing | Grant/award (A): 75,000 @ $0 | EDGAR |
| 2026-09-14 | 4 | Cheng Edmond — Chief Financial Officer | Grant/award (A): 145,000 @ $0 | EDGAR |
| 2026-07-07 | 4 | TUDER JEFFREY — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-07-02 | 4 | Barker Robert — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-07-02 | 4 | Chun Kukjin — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-07-02 | 4 | Shin Hyunsoo — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-07-02 | 4 | Lee Kyeongho — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-07-02 | 4 | Chan Nelson — Director | Grant/award (A): 9,259 @ $0 | EDGAR |
| 2026-04-02 | 4 | Chun Kukjin — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-04-02 | 4 | Barker Robert — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-04-02 | 4 | Shin Hyunsoo — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-04-02 | 4 | TUDER JEFFREY — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-04-02 | 4 | Lee Kyeongho — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-04-02 | 4 | Chan Nelson — Director | Grant/award (A): 24,122 @ $0 | EDGAR |
| 2026-03-06 | 4 | Chun Kukjin — Director | Gift (G): 40,000 @ $0 | EDGAR |
| 2026-01-05 | 4 | Barker Robert — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2026-01-05 | 4 | Chun Kukjin — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2026-01-05 | 4 | Shin Hyunsoo — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2026-01-05 | 4 | TUDER JEFFREY — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2026-01-05 | 4 | Lee Kyeongho — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2026-01-05 | 4 | Chan Nelson — Director | Grant/award (A): 22,916 @ $0 | EDGAR |
| 2025-11-28 | 4 | Shin Hyunsoo — Director | Purchase (P): 16,725 @ $1.28 | EDGAR |
| 2025-11-24 | 4 | Shin Hyunsoo — Director | Purchase (P): 25,453 @ $1.28 · Purchase (P): 3,180 @ $1.28 | EDGAR |
| 2025-10-03 | 4 | TUDER JEFFREY — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-10-02 | 4 | Shin Hyunsoo — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-10-02 | 4 | Chun Kukjin — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-10-02 | 4 | Barker Robert — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-10-02 | 4 | Lee Kyeongho — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-10-02 | 4 | Chan Nelson — Director | Grant/award (A): 18,092 @ $0 | EDGAR |
| 2025-09-30 | 4 | Schlaefer John — President, CEO & Class III Dir, Director | Other (J): 555 @ $0 | EDGAR |
| 2025-09-23 | 4 | Kim Jeong-Min — Chief Technology Officer | Grant/award (A): 75,000 @ $0 | EDGAR |
| 2025-09-23 | 4 | Sum Alex — Sr. VP of Sales and Marketing | Grant/award (A): 75,000 @ $0 | EDGAR |
| 2025-09-23 | 4 | Schlaefer John — President, CEO & Class III Dir, Director | Grant/award (A): 75,000 @ $0 | EDGAR |
| 2025-09-23 | 4 | Cheng Edmond — Chief Financial Officer | Grant/award (A): 75,000 @ $0 | EDGAR |
| 2025-09-16 | 4 | Shin Hyunsoo — Director | Purchase (P): 44,067 @ $1.51 | EDGAR |
| 2025-09-08 | 4 | Shin Hyunsoo — Director | Purchase (P): 8,250 @ $1.26 · Purchase (P): 10,300 @ $1.30 | EDGAR |
| 2025-08-19 | 4 | Shin Hyunsoo — Director | Purchase (P): 121,000 @ $1.26 | EDGAR |
| 2025-07-02 | 4 | Shin Hyunsoo — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-07-02 | 4 | Chun Kukjin — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-07-02 | 4 | Barker Robert — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-07-02 | 4 | TUDER JEFFREY — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-07-02 | 4 | Lee Kyeongho — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-07-02 | 4 | Chan Nelson — Director | Grant/award (A): 18,456 @ $0 | EDGAR |
| 2025-06-12 | 4 | Shin Hyunsoo — Director | Purchase (P): 40,000 @ $1.20 · Purchase (P): 45,000 @ $1.16 | EDGAR |
| 2025-06-06 | 4 | Shin Hyunsoo — Director | Purchase (P): 80,000 @ $1.02 · Purchase (P): 58,700 @ $1.03 · Purchase (P): 21,300 @ $1.02 | EDGAR |
| 2025-05-27 | 4 | Shin Hyunsoo — Class II Director, Director | Purchase (P): 77,000 @ $1.04 | EDGAR |
| 2025-05-21 | 4 | Shin Hyunsoo — Class II Director, Director | Purchase (P): 86,000 @ $1.18 | EDGAR |
| 2025-04-23 | 4 | TUDER JEFFREY — Director | Other (J): 16,289 · Other (J): 20,734 (derivative) @ $0 | EDGAR |
Recent 8-K events — GCT Semiconductor Holding, Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-09-18 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders | EDGAR |
| 2026-09-15 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers | EDGAR |
| 2026-08-10 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-18 | 8-K/A | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-18 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-12 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-03-25 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-25 | 8-K | 1.01 — Entry into a Material Definitive Agreement 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-01-29 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-15 | 8-K | 1.01 — Entry into a Material Definitive Agreement 2.03 — Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant 9.01 — Financial Statements and Exhibits | EDGAR |
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?ticker=GCTS returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new ones to you in seconds. API docs →