Here are the Form 4 insider transactions from GCT Semiconductor Holding, Inc. (GCTS) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow GCTS and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full GCTS filings page.
GCT Semiconductor Holding, Inc. (GCTS) Chairman and Class III Director Kyeongho Lee was awarded 12,971 restricted stock units on September 30, 2026. Each RSU represents the right to receive one common share after vesting. The RSUs vest on March 31, 2027, subject to continued service, and are payable in common stock under Lee’s deferral election. For the quarterly share calculation, the common stock fair market value was $2.12; the formula divides $27,500 by fair market value and rounds down. The transaction table reports 1,109,093 shares following the award. No Rule 10b5-1 plan is reported.
GCT Semiconductor Holding, Inc. (GCTS) reports that Class II Director Robert Barker was awarded 12,971 restricted stock units on September 30, 2026. The number for each quarter-end calculation from June 30, 2026 through March 31, 2027 is determined by dividing $27,500 by the common stock’s fair market value; the value was $2.12 per share on September 30, 2026. The RSUs vest on March 31, 2027, subject to continued service. Barker’s reported direct position after the award was 164,681 shares.
GCT Semiconductor Holding, Inc. Class III Director Jeffrey Tuder acquired 12,971 restricted stock units on September 30, 2026, as an award. Each unit represents the right to receive one common share following vesting, and reported holdings after the award were 164,161 shares. The units vest on March 31, 2027, subject to continued service, and are payable in common stock in accordance with Tuder’s deferral election.
GCT Semiconductor Holding, Inc. Class I Director Nelson Chan acquired 12,971 restricted stock units on September 30, 2026, under the GCT 2024 Omnibus Incentive Compensation Plan. His reported common stock holdings after the transaction were 147,872 shares. The RSUs vest on March 31, 2027, subject to continued service through that date.
GCT Semiconductor Holding, Inc. (GCTS) reported that Class I Director Kukjin Chun acquired 12,971 restricted stock units on September 30, 2026. The award was calculated using a $27,500 amount and a $2.12 per-share fair market value. The units vest on March 31, 2027, subject to continued service, and are payable in common stock under a deferral election. Chun's reported resulting position was 111,607 shares.
GCT Semiconductor Holding, Inc. (GCTS) Class II Director Hyunsoo Shin acquired 12,971 restricted stock units (RSUs) on September 30, 2026, under the GCT 2024 Omnibus Incentive Compensation Plan. Each RSU represents the right to receive one common share after vesting. The RSUs vest on March 31, 2027, subject to continued service through that date. Shin's reported direct position following the award was 827,039 shares.
GCT Semiconductor Holding, Inc. (symbol: GCTS) is the issuer of record for a Form 4 filing submitted to the SEC. Sum Alex reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. (GCTS) reported that Sr. VP of Sales and Marketing Alex Sum received a grant of 75,000 restricted stock units (RSUs) on September 10, 2026. Each RSU represents a contingent right to receive one share of common stock and vests in four equal 25% installments on each anniversary of the grant date, starting September 10, 2026, subject to continued service. Following this award, Sum holds 258,743 shares of common stock directly.
GCT Semiconductor Holding, Inc. (symbol: GCTS) is the issuer of record for a Form 4 filing submitted to the SEC. Schlaefer John reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. (GCTS) reported that President and CEO John Schlaefer received a grant of 150,000 restricted stock units on September 10, 2026. Each RSU represents a contingent right to receive one share of common stock and vests in four equal annual 25% installments starting September 10, 2026, subject to his continued service. Following this grant, he holds 352,728 shares directly. No Rule 10b5-1 trading plan is reported for this award.
GCT Semiconductor Holding, Inc. (symbol: GCTS) is the issuer of record for a Form 4 filing submitted to the SEC. Kim Jeong-Min reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. (GCTS) reported that Chief Technology Officer Kim Jeong-Min received an equity grant on September 10, 2026 covering 100,000 restricted stock units (RSUs), each representing a contingent right to one share of common stock. The RSUs vest in equal 25% installments on each anniversary of the September 10, 2026 grant date over four years, subject to Kim’s continued service with the company. Following this award, Kim directly holds 402,701 shares/RSUs of common stock. No Rule 10b5-1 trading plan is reported for this grant.
GCT Semiconductor Holding, Inc. (symbol: GCTS) is the issuer of record for a Form 4 filing submitted to the SEC. Cheng Edmond reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. (GCTS) reported that its Chief Financial Officer, Edmond Cheng, received a grant of 145,000 restricted stock units (RSUs) of common stock on September 10, 2026. After this award, he holds 296,000 shares/RSUs of common stock in direct ownership.
The RSUs represent a contingent right to receive one share of common stock per unit and vest over four years in equal 25% annual installments on each anniversary of the September 10, 2026 grant date, starting September 10, 2026, conditioned on his continued service with the company.
TUDER JEFFREY reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Jeffrey Tuder reported a compensation-related equity grant. He received 9,259 Restricted Stock Units (RSUs) of common stock on June 30, 2026 at a stated price of $0.00 per share, increasing his direct holdings to 151,190 shares.
Each RSU represents the right to receive one share of common stock after vesting. The quarter’s award size was calculated by dividing $27,500 by the fair market value of $2.97 per share on June 30, 2026. These RSUs are scheduled to vest on March 31, 2027, subject to his continued service.
Barker Robert reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Robert Barker received a stock-based compensation award in the form of 9,259 Restricted Stock Units (RSUs), representing the right to receive an equal number of common shares at no cost. The quarterly award amount is based on dividing $27,500 by the fair market value per share, which was $2.97 on June 30, 2026, rounded down to whole shares. These RSUs vest on March 31, 2027, subject to continued service, and will be settled in common stock according to Barker’s deferral election. Following this grant, he directly holds 151,710 shares of common stock.
GCT Semiconductor Holding, Inc. director Chun Kukjin reported an equity compensation grant rather than an open-market trade. He acquired 9,259 shares of common stock at a reported price of $0.00 per share as part of a restricted stock unit award, bringing his direct holdings to 98,636 shares.
The award size is determined quarterly from April 1, 2026 through March 31, 2027 by dividing $27,500 by the fair market value of the stock; on June 30, 2026 that value was $2.97 per share. The RSUs vest on March 31, 2027, subject to continued service, and will be settled in common stock under a deferral election.
Chan Nelson reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Nelson Chan received an equity grant of 9,259 shares of Common Stock in the form of restricted stock units (RSUs). The award was granted at no cash cost and was issued under the GCT 2024 Omnibus Incentive Compensation Plan as part of director compensation.
The number of RSUs for this period was determined by dividing $27,500 by the fair market value per share of Common Stock, which was $2.97 on June 30, 2026, and rounding down. All RSUs from this award are scheduled to vest on March 31, 2027, subject to continued service. Following this grant, Chan’s reported direct holdings total 134,901 shares of Common Stock.
Lee Kyeongho reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. reported that Chairman and Class III Director Lee Kyeongho received an equity award of 9,259 shares of Common Stock on a grant/award basis, with no cash paid per share. The award is in the form of Restricted Stock Units, each representing one future share of common stock, and was determined for the quarter by dividing $27,500 by the $2.97 fair market value per share as of June 30, 2026, rounded down to the nearest whole share. The RSUs will vest on March 31, 2027, subject to Mr. Lee’s continued service through that date, and are payable in stock in accordance with his deferral election. Following this grant, Mr. Lee directly holds 1,096,122 shares of Common Stock.
GCT Semiconductor Holding, Inc. director Hyunsoo Shin reported an equity compensation award of 9,259 shares of Common Stock in the form of Restricted Stock Units (RSUs). The grant was made at a price of $0.00 per share under the GCT 2024 Omnibus Incentive Compensation Plan.
According to the award terms, the number of RSUs for the quarter ending June 30, 2026 was determined by dividing $27,500 by the $2.97 fair market value per share, rounded down to the nearest whole share. All RSUs from this award will vest on March 31, 2027, subject to continued service, and will then convert into an equal number of common shares, bringing Shin’s reported direct holdings to 814,068 shares after the transaction.
TUDER JEFFREY reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Jeffrey Tuder reported an equity compensation grant of 24,122 shares of Common Stock through Restricted Stock Units (RSUs) at no cash cost per share. The award size was set by dividing $27,500 by the $1.14 fair market value on March 31, 2026.
The RSUs will vest on March 31, 2026, if he continues serving through that date and will be settled in Common Stock under his deferral election. Following this grant, Tuder directly holds 141,931 shares of Common Stock.
Lee Kyeongho reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. reported that Chairman and Class III Director Lee Kyeongho received a grant of 24,122 shares of Common Stock as a stock award. The award stems from Restricted Stock Units, each representing one share of common stock after vesting.
The number of RSUs was set by dividing $27,500 by the fair market value of the common stock, which was $1.14 per share on March 31, 2026, rounded down to the nearest whole share. These RSUs vest on March 31, 2026, subject to continued service, and are payable in common stock under a deferral election. Following this grant, Lee directly owns 1,086,863 shares of common stock.
GCT Semiconductor Holding, Inc. director Chan Nelson reported an award of 24,122 shares of Common Stock as restricted stock units. The grant, valued at $27,500, was calculated by dividing that amount by the fair market value of $1.14 per share on March 31, 2026.
Each RSU converts into one share of common stock after vesting. The RSUs vest on March 31, 2026, subject to continued service through that date. Following this award, Nelson directly holds 125,642 shares of the company’s Common Stock.
Chun Kukjin reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Chun Kukjin received a grant of 24,122 shares of common stock as a stock award, recorded at a price of $0.00 per share. Following this award, his direct holdings total 89,377 common shares.
The award is structured as Restricted Stock Units, each representing one share of common stock after vesting. The number of RSUs for this quarter was set by dividing $27,500 by the fair market value of $1.14 per share on March 31, 2026, rounded down, and will vest on March 31, 2026, subject to continued service.
GCT Semiconductor Holding, Inc. director Robert Barker received an equity award of 24,122 shares of common stock in the form of restricted stock units at no cash cost per share. Each RSU converts into one share of common stock after vesting.
The RSUs are scheduled to vest on March 31, 2026, subject to Mr. Barker’s continued service. The award size is based on dividing $27,500 by the fair market value per share of $1.14 on March 31, 2026, rounded down. Following this grant, he directly holds 142,451 shares.
Shin Hyunsoo reported acquisition or exercise transactions in this Form 4 filing.
GCT Semiconductor Holding, Inc. director Hyunsoo Shin reported receiving a grant of 24,122 Restricted Stock Units (RSUs) of common stock on March 31, 2026 as equity compensation under the GCT 2024 Omnibus Incentive Compensation Plan. Each RSU represents one share of common stock after vesting, with no cash price paid for the award.
The number of RSUs was determined by dividing $27,500 by the fair market value per share of common stock, which was $1.14 on March 31, 2026, then rounding down to the nearest whole share. These RSUs vest on March 31, 2026, subject to continued service. Following this grant, Shin holds 804,809 shares of common stock directly.
GCT Semiconductor Holding, Inc. director Chun Kukjin reported a bona fide gift of 40,000 shares of common stock on February 23, 2026. The transaction was recorded at a price of $0.00 per share, reflecting that it was a non-cash gift transfer. After this disposition, Chun Kukjin directly holds 65,255 shares of GCT Semiconductor common stock.
GCT Semiconductor Holding, Inc. reported an equity award to one of its directors on a Form 4. On December 31, 2025, the director acquired 22,916 shares of common stock through a grant of restricted stock units (RSUs) at a stated price of $0 per share. After this grant, the director beneficially owned 117,809 shares of common stock in total on a direct basis.
Each RSU represents the right to receive one share of common stock after vesting. The number of shares subject to this award is based on dividing $27,500 by the fair market value of the stock on specific quarterly measurement dates; for the quarter ended December 31, 2025, the fair market value per share was determined to be $1.20. The RSUs are scheduled to vest on March 31, 2026, as long as the director continues in service through that date, and no expiration date applies to these RSUs.
GCT Semiconductor Holding, Inc. reported that a Class II director received a new equity award in the form of restricted stock units. On 12/31/2025, the director was granted 22,916 shares of common stock at a price of $0 per share, reported as common stock acquired in a direct ownership capacity.
The award is structured as RSUs, each representing one share of common stock that will be delivered after vesting, in line with a deferral election made by the director. The number of RSUs for this quarter was calculated by dividing $27,500 by the fair market value of the stock, which was $1.20 per share on 12/31/2025, rounded down to the nearest whole share. The RSUs are scheduled to vest on March 31, 2026, assuming the director continues in service through that date, and they have no expiration date.
GCT Semiconductor Holding, Inc. reported that a Class I director received an equity award of 22,916 restricted stock units (RSUs) of common stock on December 31, 2025 under the company’s 2024 Omnibus Incentive Compensation Plan. Each RSU represents one share of common stock, with no cash price on grant. The quarterly award size is based on dividing $27,500 by the fair market value per share; for this grant, the fair market value was $1.20 on December 31, 2025, resulting in 22,916 RSUs after rounding down. The RSUs are scheduled to vest on March 31, 2026, subject to continued service. Following this grant, the director beneficially owned 101,520 shares of common stock.
GCT Semiconductor Holding, Inc. reported an equity award to one of its directors in the form of restricted stock units (RSUs). On 12/31/2025, the director was granted 22,916 RSUs tied to the company’s common stock at a stated price of $0, increasing the director’s beneficial ownership to 105,255 shares.
Each RSU represents the right to receive one share of common stock after vesting and will be settled in stock under a deferral election made by the director. The number of RSUs for this award is determined quarterly from April 1, 2025 through March 31, 2026 by dividing $27,500 by the fair market value per share, which was $1.20 on 12/31/2025 for this portion. These RSUs are scheduled to vest on March 31, 2026, subject to the director’s continued service, and have no stated expiration date.
GCT Semiconductor Holding, Inc. reported an equity award for a director who also serves as Chairman and Class III Director. On December 31, 2025, the director was granted 22,916 restricted stock units (RSUs) of common stock at a reference fair market value of $1.20 per share, representing a quarterly value of $27,500 for the award calculation period.
Each RSU represents the right to receive one share of common stock after vesting, and the units will vest on March 31, 2026, subject to continued service. Following this transaction, the director beneficially owned 1,062,741 shares of common stock directly. The RSUs are settled in stock according to a deferral election made by the reporting person and do not have an expiration date.
GCT Semiconductor Holding, Inc. reported an equity grant to a director in the form of restricted stock units (RSUs). On 12/31/2025, the Class II director received 22,916 shares of common stock as RSUs at a price of $0 per share under the GCT 2024 Omnibus Incentive Compensation Plan. Each RSU converts into one share of common stock after vesting, and the award is scheduled to vest on March 31, 2026, subject to continued service.
The number of RSUs for this quarter was determined by dividing $27,500 by the fair market value of the company’s common stock, which was $1.20 per share on December 31, 2025, rounded down to the nearest whole share. Following this grant, the reporting person beneficially owned 780,687 shares of GCT Semiconductor common stock directly.
GCT Semiconductor Holding, Inc. director reports open-market stock purchase. A Class II director of GCT Semiconductor Holding, Inc. (GCTS) bought 16,725 shares of common stock on 11/25/2025 in a reported purchase transaction coded “P” at a price of $1.28 per share. After this trade, the reporting person beneficially owns 757,771 shares of GCT common stock in direct ownership. The filing is made on a Form 4, which discloses changes in insider ownership for a single reporting person.
GCT Semiconductor Holding, Inc. (GCTS) filed a Form 4 reporting open-market stock purchases by a Class II director. On 11/20/2025, the reporting person bought 25,453 shares of common stock at a price of $1.28 per share. On 11/21/2025, the same person purchased an additional 3,180 common shares at $1.28 per share. After these transactions, the director beneficially owns 741,046 shares of GCTS common stock in direct ownership.