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GCT Semiconductor Holding, Inc. — Insider Transactions

Form 4 filings by directors, officers, and 10%+ shareholders

SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.

Overview All Filings Financials Insiders
Insider Title Type Shares Price Value Date
Shin Hyunsoo Purchase 16,725 $1.28 $21,408 Nov 25, 2025
Shin Hyunsoo Purchase 25,453 $1.28 $32,580 Nov 21, 2025
TUDER JEFFREY Award / Grant 18,092 Sep 30, 2025
Shin Hyunsoo Award / Grant 18,092 Sep 30, 2025
Lee Kyeongho Award / Grant 18,092 Sep 30, 2025
Chun Kukjin Award / Grant 18,092 Sep 30, 2025
Chan Nelson Award / Grant 18,092 Sep 30, 2025
Barker Robert Award / Grant 18,092 Sep 30, 2025
Schlaefer John President, CEO & Class III Dir Other 555 Sep 26, 2025
Kim Jeong-Min Chief Technology Officer Award / Grant 75,000 Sep 19, 2025
Schlaefer John President, CEO & Class III Dir Award / Grant 75,000 Sep 19, 2025
Cheng Edmond Chief Financial Officer Award / Grant 75,000 Sep 19, 2025
Sum Alex Sr. VP of Sales and Marketing Award / Grant 75,000 Sep 19, 2025
Shin Hyunsoo Purchase 44,067 $1.51 $66,541 Sep 12, 2025
Shin Hyunsoo Purchase 10,300 $1.30 $13,390 Sep 4, 2025
Shin Hyunsoo Purchase 121,000 $1.26 $152,460 Aug 15, 2025
TUDER JEFFREY Award / Grant 18,456 Jun 30, 2025
Shin Hyunsoo Award / Grant 18,456 Jun 30, 2025
Lee Kyeongho Award / Grant 18,456 Jun 30, 2025
Chun Kukjin Award / Grant 18,456 Jun 30, 2025
Chan Nelson Award / Grant 18,456 Jun 30, 2025
Barker Robert Award / Grant 18,456 Jun 30, 2025
Shin Hyunsoo Purchase 45,000 $1.16 $52,200 Jun 10, 2025
Shin Hyunsoo Purchase 80,000 $1.02 $81,600 Jun 5, 2025
Shin Hyunsoo Class II Director Purchase 77,000 $1.04 $80,080 May 23, 2025
Shin Hyunsoo Class II Director Purchase 86,000 $1.18 $101,480 May 20, 2025
Barker Robert Award / Grant 16,768 Mar 31, 2025
Shin Hyunsoo Award / Grant 16,768 Mar 31, 2025
Chun Kukjin Award / Grant 16,768 Mar 31, 2025
Lee Kyeongho Award / Grant 16,768 Mar 31, 2025
TUDER JEFFREY Award / Grant 16,768 Mar 31, 2025
Chan Nelson Award / Grant 16,768 Mar 31, 2025
Concord Sponsor Group III LLC Other 3,101,241 Mar 26, 2025
TUDER JEFFREY Other 16,289 Mar 26, 2025
Sum Alex Sr. VP of Sales and Marketing Option Exercise 13,259 $0.11 $1,458 Feb 19, 2025
Schlaefer John President, CEO & Class III Dir Option Exercise 35,669 $0.11 $3,924 Jan 13, 2025
TUDER JEFFREY Award / Grant 11,802 Dec 31, 2024
Shin Hyunsoo Award / Grant 11,802 Dec 31, 2024
Lee Kyeongho Award / Grant 11,802 Dec 31, 2024
Chun Kukjin Award / Grant 11,802 Dec 31, 2024
CHAN NELSON C Award / Grant 11,802 Dec 31, 2024
Barker Robert Award / Grant 11,802 Dec 31, 2024
Shin Hyunsoo Award / Grant 37,000 $2.57 $95,090 Dec 13, 2024
TUDER JEFFREY Award / Grant 8,208 Sep 30, 2024
Shin Hyunsoo Award / Grant 8,208 Sep 30, 2024
Lee Kyeongho Award / Grant 8,208 Sep 30, 2024
Chun Kukjin Award / Grant 8,208 Sep 30, 2024
CHAN NELSON C Award / Grant 8,208 Sep 30, 2024
Barker Robert Award / Grant 8,208 Sep 30, 2024
Anapass, Inc. Purchase 741,603 $3.02 $2,239,641 Sep 26, 2024