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. is a fabless semiconductor company focused on 4G and 5G modem and RF chipsets for fixed wireless access (FWA), mobile broadband and IoT. It designs in California and develops mainly in South Korea, selling through OEMs and ODMs worldwide.
The company began first commercial shipments of its 5G chipset in the fourth quarter of 2025 and expects average selling prices for 5G to be approximately four times those of its 4G products, which it believes can support higher revenue and gross margins. It plans additional 5G solutions for FWA, satellite, vehicle connectivity and RedCap IoT.
GCT highlights competitive strengths in multi-antenna modem technology, long-standing relationships with major operators, and a portfolio of 4G and 5G system-on-chips. Key risks include a history of losses, significant ongoing capital needs, dependence on a small number of customers, reliance on foundry partners such as Samsung and UMC, intense competition from larger rivals, and uncertainty around the pace of 5G and FWA adoption.
GCT Semiconductor Holding, Inc. reported weak 2025 results with early 5G traction. For the year ended December 31, 2025, total net revenues were $2.9 million, down from $9.1 million in 2024, while net loss widened to $43.4 million from $12.4 million, reflecting higher operating expenses and negative gross profit.
Management highlighted commercial progress in 5G, including more than 1,900 5G chipsets shipped in the fourth quarter of 2025 and a 76% sequential revenue increase in that quarter. As of December 31, 2025, the company had $0.6 million in cash and cash equivalents, total assets of $15.6 million, total liabilities of $98.9 million, and a stockholders’ deficit of $83.3 million, though cash rose to $9.4 million as of February 28, 2026.
The company expects sequential quarterly growth in revenue and 5G chipset shipments throughout 2026 and retains access to an at-the-market equity program of up to $75 million and remaining capacity of $125 million under a $200 million shelf registration.
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. registered Warrants to purchase up to 500,000 shares of common stock and the up to 500,000 Warrant Shares issuable upon exercise of those Warrants under a prospectus supplement dated March 2, 2026. The Warrants were issued on February 24, 2026 to Gogo Business Aviation LLC with an exercise price of $2.50 per share and are exercisable until the third anniversary of issuance.
The Warrants permit cash or cashless exercise (cashless exercises yield a net number of shares per the formula in the Warrants). The company will receive cash proceeds only if the Holder elects cash exercise. Shares outstanding were 72,468,938 as of February 27, 2026.
GCT Semiconductor Holding, Inc. disclosed that its subsidiary, GCT Semiconductor, Inc., amended an existing convertible promissory note with a strategic investor. The amendment extends the note’s maturity date to February 26, 2028, giving the company more time before repayment is due.
As consideration for entering into this amendment, the company agreed to issue the investor a warrant to purchase 500,000 shares of common stock at an exercise price of $2.50 per share, with a three‑year term from the issuance date.
TD Securities (USA) LLC has reported beneficial ownership of 3,693,107 shares of GCT Semiconductor Holding, Inc. common stock, equal to 6.1% of the class as of an event date of 12/31/2025. This position consists of 3,997 common shares plus 3,689,110 shares issuable upon exercise of warrants with an exercise price of $11.50 per share, which are presently exercisable.
The ownership percentage is calculated using 57,099,558 common shares outstanding as of September 30, 2025, as reported by GCT, plus the warrants. Related entities Toronto Dominion Holdings USA Inc., TD Group US Holdings LLC, and The Toronto-Dominion Bank may be deemed to have indirect interests through their ownership of TD Securities but each disclaims beneficial ownership except for any pecuniary interest. The securities are stated to be held in the ordinary course of business and not for the purpose of changing or influencing control of GCT.
GCT Semiconductor Holding, Inc. filed a current report to disclose that it has licensed its 5G and 4G chipsets to one of the world’s largest satellite communications providers. The company communicated this development through a press release that is included with the report as an exhibit.
The filing highlights a new technology licensing relationship in satellite communications, suggesting broader use of GCT’s wireless chipsets in non-terrestrial networks. Detailed commercial terms are contained in the referenced press release rather than this report.
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.