GCT Semiconductor Holding's three largest insider shareholders as of March 23, 2026 are Inc. Anapass, (TenPercentOwner, 8.02Mn shares), Kyeongho Lee (Director, 1.06Mn shares), Hyunsoo Shin (Director, 780.69K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Inc. Anapass, | 8,017,466 | 0 | 27 Sep, 2024 | |
| Kyeongho Lee | 1,062,741 | 0 | 05 Jan, 2026 | |
| Hyunsoo Shin | 780,687 | 0 | 05 Jan, 2026 | |
| Sponsor Group Iii Llc Concord | 632,586 | 0 | 28 Mar, 2025 | |
| Jeong-Min Kim | Chief Technology Officer | 302,701 | 0 | 22 Sep, 2025 |
| John Schlaefer | President, Ceo Class Iii Dir | 202,728 | 0 | 30 Sep, 2025 |
| Alex Sum | Sr. Vp Of Sales And Marketing | 183,743 | 0 | 22 Sep, 2025 |
| Robert Barker | 118,329 | 0 | 05 Jan, 2026 | |
| Jeffrey Tuder | 117,809 | 0 | 05 Jan, 2026 | |
| Kukjin Chun | 65,255 | 0 | 06 Mar, 2026 | |
| Peter Ort | 30,000 | 0 | 17 Nov, 2023 | |
| Thomas C. King | 30,000 | 0 | 17 Nov, 2023 | |
| Lawrence E Leibowitz | 30,000 | 0 | 17 Nov, 2023 | |
| David Yoon | Vice President Of Finance | 8,204 | 0 | 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 |
|---|---|---|---|---|---|---|---|---|
| 23 Feb, 2026 | Kukjin Chun | Common Stock | D | 40,000 | $0.00 | 65,255 | D | G |
| 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 | Jeffrey Tuder | Common Stock | A | 22,916 | $0.00 | 117,809 | D | A |
| 31 Dec, 2025 | Kyeongho Lee | Common Stock | A | 22,916 | $0.00 | 1,062,741 | 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 |
| 20 Nov, 2025 | Hyunsoo Shin | Common Stock | A | 25,453 | $1.28 | 737,866 | D | P |
| 21 Nov, 2025 | Hyunsoo Shin | Common Stock | A | 3,180 | $1.28 | 741,046 | D | P |
| 30 Sep, 2025 | Jeffrey Tuder | Common Stock | A | 18,092 | $0.00 | 94,893 | D | A |
| 30 Sep, 2025 | Kyeongho Lee | Common Stock | A | 18,092 | $0.00 | 1,039,825 | 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 |
| 30 Sep, 2025 | Hyunsoo Shin | Common Stock | A | 18,092 | $0.00 | 712,413 | 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 | Jeong-Min Kim | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 302,701 | D | A |
| 19 Sep, 2025 | Alex Sum | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 183,743 | D | A |
| 19 Sep, 2025 | John Schlaefer | Common Stock, par value $0.0001 per share | A | 75,000 | $0.00 | 202,173 | D | A |
| 12 Sep, 2025 | Hyunsoo Shin | Common Stock | A | 44,067 | $1.51 | 694,321 | D | P |
| 04 Sep, 2025 | Hyunsoo Shin | Common Stock | A | 8,250 | $1.26 | 639,954 | D | P |