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.
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.
GCT Semiconductor Holding, Inc. reported second-quarter 2026 results showing early 5G commercialization with continued losses. The company shipped over 5,100 5G chipsets in Q2 2026, with shipments up approximately 71% sequentially, and expects aggregate 5G shipments in the second half of 2026 to exceed first-half levels.
For the quarter ended June 30, 2026, net revenues were $0.97 million versus $1.18 million a year earlier, producing a gross loss of $0.23 million compared with gross profit previously. Six-month 2026 net revenues were $2.89 million, up from $1.68 million, and the company states first-half revenue slightly exceeds full-year 2025. Q2 net loss widened to $20.4 million, significantly affected by a $12.3 million non-cash loss from the change in fair value of warrant liabilities. Adjusted EBITDA loss for Q2 was $6.63 million, similar to the prior year.
Liquidity improved, with $30.2 million of cash and cash equivalents at June 30, 2026, versus $0.6 million at year-end 2025, and total assets of $49.8 million. GCT has an effective $200.0 million universal shelf registration, and during Q2 increased the at-market equity program capacity from $75.0 million to $120.0 million, enhancing potential access to capital while operating with a stockholders’ deficit of $52.0 million.
GCT Semiconductor Holding, Inc., a fabless 5G semiconductor company, reported Q2 2026 net revenues of $0.97 million, down from $1.18 million a year earlier, and a net loss of $20.4 million versus $13.5 million. For the first six months of 2026, revenue was $2.89 million and net loss was $30.2 million, compared with $1.68 million and $20.5 million, respectively.
Operating loss narrowed modestly year to date, but bottom-line results were heavily affected by a $15.4 million year-to-date loss from changes in the fair value of warrant liabilities. Cash and cash equivalents increased to $30.2 million from $0.6 million at December 31, 2025, primarily driven by $55.7 million of gross proceeds from an at-the-market equity program and $2.8 million from Indigo convertible notes. Total debt stood at $55.1 million, including sizable related-party borrowings, and warrant liabilities rose to $18.3 million.
The company ended Q2 2026 with an accumulated deficit of $635.6 million and a stockholders’ deficit of $52.0 million, though this improved from a deficit of $83.3 million at year-end 2025 due to capital raises and currency translation gains. Management disclosed that recurring losses, negative operating cash flows, high leverage, and dependence on additional financing raise substantial doubt about its ability to continue as a going concern beyond 12 months, despite access to an expanded ATM facility and an undrawn $20.0 million Obsidian convertible note facility.
GCT Semiconductor Holding, Inc. is a fabless designer of 4G/5G modem and RF chipsets focused on fixed wireless access, mobile broadband and IoT. It completed a business combination with Concord Acquisition Corp III in March 2024, with historical results now presented on a combined-company basis.
The company began first commercial shipments of its 5G chipset portfolio in the fourth quarter of 2025, adding to established 4G LTE, 4.5G and 4.75G products. Management expects average selling prices for its 5G chipsets to be approximately four times those of its 4G chipsets. GCT highlights proprietary multi-antenna modem technology, including eight‑antenna LTE solutions, close relationships with a Tier 1 wireless operator under a long‑running joint development agreement, and Samsung foundry access for advanced nodes.
Key risks include a history of losses, significant ongoing capital needs and indebtedness, reliance on a small customer base (four customers generated 74% of 2025 revenue), dependence on successful and timely 5G market adoption, foundry capacity and yields, and export control and certification regimes. Common stock remains listed on the NYSE.
GCT Semiconductor Holding, Inc. is calling its 2026 annual stockholders meeting for September 17, 2026, to be held in a virtual-only format. Stockholders of record as of July 24, 2026, when 91,965,788 common shares were outstanding, will vote on electing two Class II directors (Robert J. Barker and Hyunsoo “Hans” Shin) to terms ending in 2029 and on ratifying BPM LLP as independent registered public accounting firm for 2026.
The board reports that six of seven directors are NYSE-independent and details cash and equity compensation for non-employee directors, including annual retainers, committee fees, and $110,000 in RSU awards per director under the 2024 Plan, subject to deferral elections and a $500,000 annual cap. Extensive related-party financing is described, including multiple secured and unsecured loans to a Korean subsidiary from Anapass, banks, and Chairman Kyeongho Lee, with recent extensions, interest-rate increases, and collateral over substantially all assets.
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.