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. 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. is registering up to $20,000,000 aggregate principal amount of interest-free mandatory convertible promissory notes (the “Convertible Notes”) and the common stock issuable upon conversion. The notes may be issued in tranches up to $500,000 each at 96.5% of principal, mature 24 months after issuance and convert at a price equal to 95% of the three‑day VWAP prior to conversion, subject to a 4.99% beneficial ownership cap (up to 9.99% with notice) and NYSE exchange‑approval limits. The company may redeem notes for cash after 12 months with a premium (7% if redeemed between 12–18 months; 14% thereafter). GCT must maintain an authorized reserve of at least 200% of shares issuable on full conversion. The offering proceeds (net ≈ $18.7M) are intended for working capital, general corporate purposes and repayment of certain indebtedness.
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.