Welcome to our dedicated page for GCT Semiconductor Holding SEC filings (Ticker: GCTS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
GCT Semiconductor Holding, Inc. filings document a fabless semiconductor issuer with NYSE-listed common stock and public warrants. Recent Form 8-K reports cover quarterly and annual financial results, 5G and 4G chipset licensing announcements, material definitive agreements, direct financial obligations and shareholder voting matters.
The company’s regulatory record includes disclosures on convertible promissory notes, warrant issuance agreements, a subsidiary loan facility, registered common-stock issuances and resale registration references. Governance filings report annual meeting results, director elections, auditor ratification and exchange-rule matters, while event reports identify the company’s Delaware corporate status and securities structure.
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.
GCT Semiconductor Holding, Inc. filed an amended current report to add a legal opinion related to its existing at-the-market stock issuance program. The opinion from Morgan, Lewis & Bockius LLP covers the legality of shares issuable under an At Market Issuance Sales Agreement dated April 1, 2025, supported by a prospectus supplement filed June 18, 2026 under an effective Form S-3 shelf registration. This update is administrative and does not itself represent a new offer or sale of shares.
GCT Semiconductor Holding, Inc. filed a current report to add a legal opinion supporting the validity of shares issuable under its At Market Issuance Sales Agreement. The opinion, from Morgan, Lewis & Bockius LLP, relates to a prospectus supplement filed on June 18, 2026, which supplements the Company’s shelf registration statement on Form S-3 (File No. 333-286316) that was declared effective on April 9, 2025. The filing clarifies that it is not itself an offer to sell or a solicitation to buy the common stock referenced.
GCT Semiconductor Holding, Inc. is amending its at-the-market (ATM) program to increase the aggregate capacity to $120,000,000 of Common Stock under an existing sales agreement with B. Riley Securities, Inc. and H.C. Wainwright & Co., LLC. The supplement increases the prior program by $45.0 million and replaces the April 9, 2025 ATM prospectus.
The ATM permits sales from time to time at market prices under Rule 415(a)(4). As of June 15, 2026, the company had sold $55.1 million of Common Stock under the program and had 90,963,011 shares outstanding. Sales agents may receive commissions up to 3.0% of gross proceeds and other specified expense reimbursements. Net proceeds are for general corporate purposes.
GCT Semiconductor Holding, Inc. ownership disclosure: TD Securities (USA) LLC reports beneficial ownership of 3,456,392 shares, representing 4.6% of the class as calculated by the filers. The position comprises 3,997 shares plus 3,452,395 shares issuable upon exercise of warrants exercisable at $11.50 per share; outstanding common shares were 72,494,116 as of December 31, 2025. The statement is filed jointly by TDS, Toronto Dominion Holdings USA Inc., TD Group US Holdings LLC and Toronto‑Dominion Bank, with ownership reported as sole for TDS and disclaimed by the parent entities except to the extent of pecuniary interest.