According to recent filings covering the 90 days ending January 10, 2026, the three most significant insider holders at GCT Semiconductor Holding are TenPercentOwner Inc. Anapass, (8.02Mn shares), Director Kyeongho Lee (1.06Mn shares), Director Hyunsoo Shin (780.69K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Inc. Anapass, | 8,017,466 | 27 Sep, 2024 | |
| Kyeongho Lee | 1,062,741 | 05 Jan, 2026 | |
| Hyunsoo Shin | 780,687 | 05 Jan, 2026 | |
| Sponsor Group Iii Llc Concord | 632,586 | 28 Mar, 2025 | |
| Jeong-Min Kim | Chief Technology Officer | 302,701 | 22 Sep, 2025 |
| John Schlaefer | President And Ceo & Class Iii Dir | 202,728 | 30 Sep, 2025 |
| Alex Sum | Sr. Vp Of Sales And Marketing | 183,743 | 22 Sep, 2025 |
| Edmond Cheng | Chief Financial Officer | 151,000 | 22 Sep, 2025 |
| Robert Barker | 118,329 | 05 Jan, 2026 | |
| Jeffrey Tuder | 117,809 | 05 Jan, 2026 | |
| Kukjin Chun | 105,255 | 05 Jan, 2026 | |
| Nelson Chan | 101,520 | 05 Jan, 2026 | |
| Thomas C. King | 30,000 | 17 Nov, 2023 | |
| Peter Ort | 30,000 | 17 Nov, 2023 | |
| Lawrence E Leibowitz | 30,000 | 17 Nov, 2023 | |
| David Yoon | Vice President Of Finance | 8,204 | 27 Mar, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 31 Dec, 2025 | Nelson Chan | Common Stock | A | 22,916 | $0.00 | 101,520 | D | A |
| 31 Dec, 2025 | Kyeongho Lee | Common Stock | A | 22,916 | $0.00 | 1,062,741 | D | A |
| 31 Dec, 2025 | Jeffrey Tuder | Common Stock | A | 22,916 | $0.00 | 117,809 | D | A |
| 31 Dec, 2025 | Hyunsoo Shin | Common Stock | A | 22,916 | $0.00 | 780,687 | D | A |
| 31 Dec, 2025 | Robert Barker | Common Stock | A | 22,916 | $0.00 | 118,329 | D | A |
| 31 Dec, 2025 | Kukjin Chun | Common Stock | A | 22,916 | $0.00 | 105,255 | D | A |
| 25 Nov, 2025 | Hyunsoo Shin | Common Stock | A | 16,725 | $1.28 | 757,771 | D | P |
| 21 Nov, 2025 | Hyunsoo Shin | Common Stock | A | 3,180 | $1.28 | 741,046 | D | P |
| 20 Nov, 2025 | Hyunsoo Shin | Common Stock | A | 25,453 | $1.28 | 737,866 | D | P |
| 30 Sep, 2025 | Nelson Chan | Common Stock | A | 18,092 | $0.00 | 78,604 | D | A |
| 30 Sep, 2025 | Kyeongho Lee | Common Stock | A | 18,092 | $0.00 | 1,039,825 | D | A |
| 30 Sep, 2025 | Jeffrey Tuder | Common Stock | A | 18,092 | $0.00 | 94,893 | D | A |
| 30 Sep, 2025 | Hyunsoo Shin | Common Stock | A | 18,092 | $0.00 | 712,413 | D | A |
| 30 Sep, 2025 | Robert Barker | Common Stock | A | 18,092 | $0.00 | 95,413 | D | A |
| 30 Sep, 2025 | Kukjin Chun | Common Stock | A | 18,092 | $0.00 | 82,339 | D | A |
| 26 Sep, 2025 | John Schlaefer | Common Stock, par value $0.0001 per share | A | 555 | $0.00 | 202,728 | D | J |
| 19 Sep, 2025 | Edmond Cheng | - | - | 151,000 | D | |||
| 19 Sep, 2025 | Edmond Cheng | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 151,000 | D | A |
| 19 Sep, 2025 | John Schlaefer | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 202,173 | D | A |
| 19 Sep, 2025 | Alex Sum | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 183,743 | D | A |