GCT Semiconductor Holding GCTS-WT Insider Ownership

NYSE GCTS-WT
$0.32 +0.02 (+6.26%)
As of: Aug 21, 2026 · 3:57 PM EDT

Insider Holdings by Owner

20.06Mn Shares

Insider Ownership Statistics

as of 30 Jun, 2026
Insider Ownership
share count not reported for this filer set
Shares Held by Insiders
125.64K
filed for Jun 2026
0.00% QoQ
Shares Outstanding
not reported
Direct Holdings
125.64K
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in Jun 2026
Insiders Holding Shares
14
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters
Form 4 Holdings

Insiders Holding GCTS-WT

Insiders 14
Shares held 20.06Mn
Of outstanding
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Sponsor Group Iii Llc Concord TenPercentOwner 8,590,312 0 8,590,312 42.8% 28 Mar, 2025
2 Inc. Anapass, TenPercentOwner 8,017,466 0 8,017,466 40.0% 27 Sep, 2024
3 Kyeongho Lee Director, Other 1,180,243 0 1,180,243 5.9% 02 Apr, 2026
4 Hyunsoo Shin Director, Other 808,544 0 808,544 4.0% 02 Apr, 2026
5 Jeong-Min Kim Chief Technology Officer 302,701 0 302,701 1.5% 22 Sep, 2025
6 Edmond Cheng Chief Financial Officer 227,000 0 227,000 1.1% 22 Sep, 2025
7 John Schlaefer President, Ceo Class Iii Dir 202,728 0 202,728 1.0% 30 Sep, 2025
8 Alex Sum Sr. Vp Of Sales And Marketing 183,743 0 183,743 0.9% 22 Sep, 2025
9 Robert Barker Director, Other 146,186 0 146,186 0.7% 02 Apr, 2026
10 Jeffrey Tuder Director, Other 141,931 0 141,931 0.7% 02 Apr, 2026
11 Nelson Chan Director, Other 125,642 0 125,642 0.6% 02 Apr, 2026
12 Kukjin Chun Director, Other 93,112 0 93,112 0.5% 02 Apr, 2026
13 Peter Ort Director 30,000 0 30,000 0.1% 17 Nov, 2023
14 David Yoon Vice President Of Finance 8,204 0 8,204 0.0% 27 Mar, 2024

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

305 Insider Transactions

Source SEC Form 4
Latest quarter Jun 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
31 Mar, 2026 Kyeongho Lee Director, Other Acquired A 24,122 $0.00 $0 1,086,863 Direct
31 Mar, 2026 Kukjin Chun Director, Other Acquired A 24,122 $0.00 $0 89,377 Direct
31 Mar, 2026 Kyeongho Lee Director, Other Acquired A 24,122 $0.00 $0 1,086,863 Direct
31 Mar, 2026 Hyunsoo Shin Director, Other Acquired A 24,122 $0.00 $0 804,809 Direct
31 Mar, 2026 Jeffrey Tuder Director, Other Acquired A 24,122 $0.00 $0 141,931 Direct
31 Mar, 2026 Jeffrey Tuder Director, Other Acquired A 24,122 $0.00 $0 141,931 Direct
31 Mar, 2026 Hyunsoo Shin Director, Other Acquired A 24,122 $0.00 $0 804,809 Direct
31 Mar, 2026 Nelson Chan Director, Other Acquired A 24,122 $0.00 $0 125,642 Direct
31 Mar, 2026 Hyunsoo Shin Director, Other Acquired A 24,122 $0.00 $0 804,809 Direct
31 Mar, 2026 Jeffrey Tuder Director, Other Acquired A 24,122 $0.00 $0 141,931 Direct
31 Mar, 2026 Kyeongho Lee Director, Other Acquired A 24,122 $0.00 $0 1,086,863 Direct
31 Mar, 2026 Robert Barker Director, Other Acquired A 24,122 $0.00 $0 142,451 Direct
23 Feb, 2026 Kukjin Chun Director, Other Disposed G 40,000 $0.00 $0 65,255 Direct
31 Dec, 2025 Kyeongho Lee Director, Other Acquired A 22,916 $0.00 $0 1,062,741 Direct
31 Dec, 2025 Jeffrey Tuder Director, Other Acquired A 22,916 $0.00 $0 117,809 Direct
31 Dec, 2025 Kyeongho Lee Director, Other Acquired A 22,916 $0.00 $0 1,062,741 Direct
31 Dec, 2025 Jeffrey Tuder Director, Other Acquired A 22,916 $0.00 $0 117,809 Direct
31 Dec, 2025 Hyunsoo Shin Director, Other Acquired A 22,916 $0.00 $0 780,687 Direct
31 Dec, 2025 Jeffrey Tuder Director, Other Acquired A 22,916 $0.00 $0 117,809 Direct
31 Dec, 2025 Hyunsoo Shin Director, Other Acquired A 22,916 $0.00 $0 780,687 Direct