GCT Semiconductor Holding, Inc. (GCTS) has 14 known insider and institutional holders on record. The largest holder is Lee Kyeongho with 1,086,863 shares. Other notable holders include Shin Hyunsoo and Kim Jeong-Min.
Over the last 12 months, insiders have made 43 transactions in GCTS stock — 42 buys (valued at $910.91K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
GCTS Insider Ownership
Top Holder
Lee Kyeongho
1,086,863 shares
Buys (12 mo)
42
$910.91K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Lee Kyeongho |
Other: Chairman & Class Iii Director |
1,086,863 |
2026-04-02 |
|
| 2 |
Shin Hyunsoo |
Other: Class Ii Director |
804,809 |
2026-04-02 |
|
| 3 |
Kim Jeong-min |
Chief Technology Officer |
302,701 |
2025-09-23 |
|
| 4 |
Kim Jeemee |
VP of Engineering & CTO |
215,286 |
2025-04-07 |
|
| 5 |
Schlaefer John |
President, CEO & Class Iii Dir |
202,728 |
2025-09-30 |
|
| 6 |
Sum Alex |
Sr. VP of Sales and Marketing |
183,743 |
2025-09-23 |
|
| 7 |
Cheng Edmond |
Chief Financial Officer |
151,000 |
2025-09-23 |
|
| 8 |
Anapass, Inc. |
10 Percent Owner |
148,320 |
2024-09-27 |
|
| 9 |
Barker Robert |
Other: Class Ii Director |
142,451 |
2026-04-02 |
|
| 10 |
Tuder Jeffrey |
Other: Class Iii Director |
141,931 |
2026-04-02 |
|
| 11 |
Chan Nelson |
Other: Class I Director |
125,642 |
2026-04-02 |
|
| 12 |
Chun Kukjin |
Other: Class I Director |
89,377 |
2026-04-02 |
|
| 13 |
Chan Nelson C |
Other: Class I Director |
25,288 |
2025-01-02 |
|
| 14 |
Yoon David |
Vice President of Finance |
6,536 |
2024-03-27 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-31 |
Chun Kukjin |
Other: Class I Director |
RSU Award |
24,122 |
- |
- |
| 2026-03-31 |
Barker Robert |
Other: Class Ii Director |
RSU Award |
24,122 |
- |
- |
| 2026-03-31 |
Shin Hyunsoo |
Other: Class Ii Director |
RSU Award |
24,122 |
- |
- |
| 2026-03-31 |
Tuder Jeffrey |
Other: Class Iii Director |
RSU Award |
24,122 |
- |
- |
| 2026-03-31 |
Lee Kyeongho |
Other: Chairman & Class Iii Director |
RSU Award |
24,122 |
- |
- |
| 2026-03-31 |
Chan Nelson |
Other: Class I Director |
RSU Award |
24,122 |
- |
- |
| 2026-02-23 |
Chun Kukjin |
Other: Class I Director |
Gift (Given) |
40,000 |
- |
- |
| 2025-12-31 |
Chun Kukjin |
Other: Class I Director |
RSU Award |
22,916 |
- |
- |
| 2025-12-31 |
Barker Robert |
Other: Class Ii Director |
RSU Award |
22,916 |
- |
- |
| 2025-12-31 |
Shin Hyunsoo |
Other: Class Ii Director |
RSU Award |
22,916 |
- |
- |
| 2025-12-31 |
Tuder Jeffrey |
Other: Class Iii Director |
RSU Award |
22,916 |
- |
- |
| 2025-12-31 |
Lee Kyeongho |
Other: Chairman & Class Iii Director |
RSU Award |
22,916 |
- |
- |
| 2025-12-31 |
Chan Nelson |
Other: Class I Director |
RSU Award |
22,916 |
- |
- |
| 2025-11-25 |
Shin Hyunsoo |
Other: Class Ii Director |
Informative Buy |
16,725 |
$1.28 |
$21.41K |
| 2025-11-21 |
Shin Hyunsoo |
Other: Class Ii Director |
Informative Buy |
3,180 |
$1.28 |
$4.07K |
| 2025-11-20 |
Shin Hyunsoo |
Other: Class Ii Director |
Informative Buy |
25,453 |
$1.28 |
$32.58K |
| 2025-09-30 |
Tuder Jeffrey |
Other: Class Iii Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-30 |
Chun Kukjin |
Other: Class I Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-30 |
Barker Robert |
Other: Class Ii Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-30 |
Shin Hyunsoo |
Other: Class Ii Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-30 |
Lee Kyeongho |
Other: Chairman & Class Iii Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-30 |
Chan Nelson |
Other: Class I Director |
RSU Award |
18,092 |
- |
- |
| 2025-09-26 |
Schlaefer John |
President, CEO & Class Iii Dir |
Other (Buy) |
555 |
- |
- |
| 2025-09-19 |
Kim Jeong-min |
Chief Technology Officer |
RSU Award |
75,000 |
- |
- |
| 2025-09-19 |
Sum Alex |
Sr. VP of Sales and Marketing |
RSU Award |
75,000 |
- |
- |
