GCT Semiconductor Holding, Inc. (GCTS) Insider Ownership

Historic Ownership Trends

There are no significant Insider Shareholders in GCT Semiconductor Holding as of December 12, 2025.

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Inc. Anapass, 8,017,466 27 Sep, 2024
Kyeongho Lee 1,039,825 02 Oct, 2025
Hyunsoo Shin 757,771 28 Nov, 2025
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 95,413 02 Oct, 2025
Jeffrey Tuder 94,893 03 Oct, 2025
Kukjin Chun 82,339 02 Oct, 2025
Nelson Chan 78,604 02 Oct, 2025
Thomas C. King 30,000 17 Nov, 2023
Lawrence E Leibowitz 30,000 17 Nov, 2023
Peter Ort 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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
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 Robert Barker Common Stock A 18,092 $0.00 95,413 D A
30 Sep, 2025 Hyunsoo Shin Common Stock A 18,092 $0.00 712,413 D A
30 Sep, 2025 Kyeongho Lee Common Stock A 18,092 $0.00 1,039,825 D A
30 Sep, 2025 Robert Barker - - 95,413 D
30 Sep, 2025 Jeffrey Tuder Common Stock A 18,092 $0.00 94,893 D A
30 Sep, 2025 Kukjin Chun Common Stock A 18,092 $0.00 82,339 D A
30 Sep, 2025 Nelson Chan Common Stock A 18,092 $0.00 78,604 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 Common Stock, par value $0.0001 per share A 75,000 $0.00 151,000 D A
19 Sep, 2025 Alex Sum - - 183,743 D
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
19 Sep, 2025 Jeong-Min Kim Common Stock, par value $0.0001 per share A 75,000 $0.00 302,701 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
05 Sep, 2025 Hyunsoo Shin Common Stock A 10,300 $1.30 650,254 D P
15 Aug, 2025 Hyunsoo Shin Common Stock A 121,000 $1.26 631,704 D P