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.
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Alex Sum, Sr. VP of Sales and Marketing at GCT Semiconductor Holding, Inc. (GCTS), was granted 75,000 restricted stock units (RSUs) on 09/19/2025. The RSUs carry a $0 grant price and represent a contingent right to one share of common stock each. They vest in four equal annual installments (25% each) beginning on 09/19/2026, subject to continued service. After the grant, the reporting person beneficially owned 183,743 shares. The Form 4 was signed by an attorney-in-fact on 09/22/2025.
Insider purchase by director. GCT Semiconductor Holding director Shin Hyunsoo purchased 44,067 shares of common stock on 09/12/2025 at $1.51 per share, increasing his direct holdings to 694,321 shares. The filing reports only a non-derivative acquisition and lists no derivative transactions. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person.
GCT Semiconductor Holding director Hyunsoo Shin reported purchases of common stock on September 4-5, 2025, acquiring 8,250 shares at $1.26 and 10,300 shares at $1.30 respectively, increasing his beneficial ownership to 650,254 shares. The Form 4 was signed by an attorney-in-fact and shows direct ownership; no derivative transactions were reported.
SUNP Corporation filed an amendment to Schedule 13G reporting ownership of 2,910,870 shares of GCT Semiconductor Holding, Inc. Common Stock, representing 5.2% of the outstanding class based on 55,859,904 shares. The filing shows SUNP has sole voting and dispositive power over 2,605,109 shares and shared voting and dispositive power over 305,761 shares. The shares are directly held by several SUNP subsidiaries, with SUNP retaining voting/dispositive authority as disclosed. The filing includes a certification that the stake was not acquired to influence control.
Insider purchase reported for GCT Semiconductor Holding, Inc. (GCTS). Director Shin Hyunsoo acquired 121,000 shares of the company's common stock on 08/15/2025 at a price of $1.26 per share. Following the reported purchase, the reporting person beneficially owns 631,704 shares. The Form 4 was executed by attorney-in-fact Edmond Cheng and dated 08/19/2025. The filing identifies Shin Hyunsoo as a Class II Director and the form was filed by one reporting person.
GCT Semiconductor Holding, Inc. reported a net loss of $13.54 million for the three months ended June 30, 2025 and $20.51 million for the six months, on total net revenues of $1.18 million in Q2 2025 and $1.68 million year-to-date. Gross profit for Q2 was $0.38 million while quarterly operating expenses were $7.97 million (R&D $3.51M, G&A $3.44M). Cash and cash equivalents totaled $1.27 million and the company had an accumulated deficit of $582.5 million and total debt principal of $51.675 million as of June 30, 2025.
Management disclosed substantial doubt about the company’s ability to continue as a going concern beyond twelve months without additional financing. Recent financing activity included net proceeds of $9.9 million from a May 2025 registered direct offering and approximately $0.5 million from ATM sales in Q2 2025; the company also has a $50.0 million committed sales agreement with B. Riley (approximately $9.9M used to date). Customer concentration and material foreign currency losses were noted.
GCT Semiconductor Holding, Inc. furnished an 8-K reporting that it issued a press release announcing its financial results for the quarter ended June 30, 2025, with that press release furnished as Exhibit 99.1. The company also furnished its cover page interactive XBRL file as Exhibit 104. The filing notes the company is an emerging growth company and reports its securities as Common Stock (GCTS) and warrants (GCTS.WS) listed on the NYSE.
The report states the information in Item 2.02 and Exhibit 99.1 is furnished and is not deemed "filed" for purposes of Section 18 of the Exchange Act and is not incorporated by reference into other filings. No financial figures, operating metrics, or other result details are included in this 8-K; readers must consult Exhibit 99.1 for the substantive results.
GCT Semiconductor Holding, Inc. disclosed that TD Securities (USA) LLC beneficially owns 3,764,360 shares, equal to 7.2% of the outstanding class. That ownership consists of 221,771 common shares plus 3,542,589 shares issuable upon exercise of warrants that are presently exercisable at an $11.50 exercise price. The 7.2% figure is calculated using 48,473,433 shares the issuer reported outstanding for the quarter ended March 31, 2025, plus the warrants. TD Securities reports sole voting and dispositive power over the reported shares and the disclosure is filed jointly with affiliated TD entities that disclaim direct ownership except for pecuniary interest.
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