Every 424B that GCT Semiconductor Holding, Inc. (GCTS) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, 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. 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. 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. 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. is offering up to $20,000,000 principal amount of unsecured, interest-free mandatory convertible promissory notes and the common stock issuable upon their conversion under its shelf registration.
The notes are issued at 93% of par in weekly tranches of up to $1,000,000, mature in 24 months, and may be converted by the investor at any time at a price equal to 90% of the lowest three-day VWAP before a conversion notice. At maturity, conversion is mandatory unless GCT repays the notes in cash at 114% of principal; the company can also redeem after 12 months at 107%, or 114% after 18 months.
GCT estimates net proceeds of approximately $17.5 million, which it currently plans to use for working capital and general corporate purposes, including repayment of certain existing debt. The company’s net tangible book value as of September 30, 2025 was approximately negative $82.9 million, or negative $1.47 per share, and the prospectus illustrates dilution to new investors if the notes convert at an assumed price of $1.45 per share. Conversions are subject to 4.99% (or 9.99% on notice) beneficial ownership limits and a 19.99% NYSE exchange cap.