# EDGAR Filing Document

**Accession Number:** 0001851961
**File Stem:** 0000929638-26-001816
**Filing Date:** 2026-5
**Character Count:** 21006
**Document Hash:** 57075611528ef55cb892f5dc5f0198c3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000929638-26-001816.hdr.sgml**: 20260512

**ACCESSION NUMBER**: 0000929638-26-001816

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20260512

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260512

**DATE AS OF CHANGE**: 20260512

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GCT Semiconductor Holding, Inc.
- **CENTRAL INDEX KEY:** 0001851961
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 862171699
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41013
- **FILM NUMBER:** 26968765

**BUSINESS ADDRESS:**
- **STREET 1:** 2290 NORTH 1ST STREET
- **STREET 2:** SUITE 201
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131
- **BUSINESS PHONE:** 408-434-6040

**MAIL ADDRESS:**
- **STREET 1:** 2290 NORTH 1ST STREET
- **STREET 2:** SUITE 201
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Concord Acquisition Corp III
- **DATE OF NAME CHANGE:** 20210318

?xml version='1.0' encoding='ASCII'?

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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### FORM 8-K

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#### Current Report

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of Earliest Event Reported): May 12, 2026

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## GCT Semiconductor Holding, Inc.

#### (Exact Name of Registrant as Specified in Its Charter)

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#### 001-41013

#### (Commission File Number)

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| | |
|:---|:---|
| **Delaware**<br>| **86-2171699**<br>|
| **(State or Other Jurisdiction of Incorporation)** | **(I.R.S. Employer Identification No.)** |

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#### 2290 North 1st Street, Suite 201

#### San Jose, CA 95131

#### (Address of principal executive offices, including zip code)
(408) 434-6040

#### (Registrant's telephone number, including area code)

#### N/A

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(g) of the Act:

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock, par value $0.0001 per share | GCTS | NYSE |
| Warrants, each whole warrant exercisable for one share of Common Stock for $11.50 per share | GCTS.WS | NYSE |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter):

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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#### Item 2.02 Results of Operations and Financial Condition.
On May 12, 2026, GCT Semiconductor Holding, Inc. (the "Company") issued a press release announcing financial results as of and for the quarter ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information in Item 2.02 of this Current Report, including Exhibit 99.1 attached hereto, shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

#### Item 9.01 Financial Statements and Exhibits.
(d) Exhibits

#### Exhibit Index

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| | |
|:---|:---|
| **Exhibit**<br> **Number** | **Description** |
| [99.1](exhibit99-1.htm) | [Press Release, dated May 12, 2026, of GCT Semiconductor Holding, Inc.](exhibit99-1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

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#### SIGNATURE
Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  |  | **GCT SEMICONDUCTOR HOLDING, INC.** |
| May 12, 2026 | By: | /s/ Edmond Cheng |
|  | Name: <br>| Edmond Cheng |
|  | Title: | Chief Financial Officer |

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## Exhibit 99.1

![](image00001.jpg)

### GCT Semiconductor Holding, Inc. Provides Business Update and Reports First Quarter 2026 Financial Results
*Q1 2026 Total Revenue Increased Approximately 287% Year-Over-Year*

*5G Chipsets Shipments in Q1 2026 Increased Approximately 58% Sequentially*

**SAN JOSE, CA – May 12, 2026** – GCT Semiconductor Holding, Inc. ("GCT" or the "Company") (NYSE: GCTS), a leading designer and supplier of advanced 5G and 4G semiconductor solutions, today provided an update on business developments and reported financial results for the first quarter ended March 31, 2026.

#### Recent Operational Highlights

• 5G chipset shipments in Q1 of 2026 increased sequentially by approximately 58% to 3,000 units, signaling the anticipated commercial ramp, which is expected to continue throughout the year as additional orders from lead customers are received.

• Expanded licensing agreement with one of the world's largest satellite communications providers to include additional GCT 5G and 4G chipset integrations across next-generation user equipment, reinforcing the Company's role in enabling seamless satellite-terrestrial connectivity, broadening deployment scope, and supporting a multi-phase pathway for increased chipset adoption. The initial 5G chipset shipments to this partner remain on track to begin in the second half of 2026.

"Following the foundational progress of our commercial 5G operations at the end of 2025, our first quarter 2026 results demonstrate that we have now entered a new phase defined by increasing customer shipments," **said John Schlaefer, Chief Executive Officer of GCT**. "In the first quarter we delivered a substantial 58% sequential increase in 5G chipset shipments, a clear indicator that customers are continuing to transition from evaluation into early deployment. At the same time, we are expanding the scope and depth of our customer relationships and chipset use cases. Our broadened licensing agreement with one of the world's largest global satellite communications providers highlights the growing importance of GCT technology in enabling converged connectivity across both terrestrial and non-terrestrial networks. We view this as a multi-phase opportunity that can drive incremental adoption of our solutions over time as next generation user equipment platforms are introduced.

"Looking ahead, our focus remains on scaling 5G chipset production by strengthening our supply chain and operational infrastructure to support higher volumes. While we are still in the early stages of this ramp, we believe the progress achieved in the first quarter reinforces our expectation, and aligns with our previous experience in 4G. We expect sequential growth in 5G chipset shipments as commercialization ramps throughout the year."

"Our first quarter results reflect a meaningful step from last quarter but remain modest in comparison to our mid-and-long-term expectations," **said Edmond Cheng, Chief Financial Officer of GCT**. "Our revenue increased 287%

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year-over-year, driven by increased 5G shipments and continued contribution from our service and new contracts win, as we support our lead customers in their transition to 5G. Moving further into 2026, our priorities remain consistent: maintaining financial flexibility and disciplined capital allocations to support 5G chipset commercialization and volume production readiness to ensure we are positioned to capitalize on the expanding 5G opportunity."

#### First Quarter 2026 Financial Results
*Results compare the 2026 fiscal first quarter ended March 31, 2026, to the 2025 fiscal first quarter ended March 31, 2025.*

• **Net revenues** were $1.9 million, a 287.1% increase from $0.5 million.

• **Gross margin** for the three months ended March 31, 2026 increased to 49.3% compared to 17.7% in the period ended March 31, 2025, primarily due to higher margins from the Company's service offerings and increased share of 5G platform sales throughout the 2026 fiscal first quarter.

• **Total operating expenses** were $7.1 million, a 9.6% decrease from $7.8 million.

#### Liquidity
The Company's existing sources of liquidity as of March 31, 2026, include cash and cash equivalents of $7.2 million, net accounts receivable of $2.4 million, and inventory of $1.6 million. In the second fiscal quarter of 2025, GCT filed a universal shelf registration statement on Form S-3 that allows the Company to raise up to $200.0 million through the issuance of securities, including the $75.0 million for the ATM Offering.

#### 5G Outlook
The Company continues to expect sequential quarterly growth in 5G shipments throughout 2026.

#### Conference Call
The Company will hold a conference call and live webcast at 4:30 p.m. ET or 1:30 p.m. PST, which will be open to the public. During the conference call, the Company will discuss business updates and review the financial results, followed by a Q&A period.

Date: Tuesday, May 12, 2026

Time: 4:30 p.m. Eastern time (1:30 p.m. Pacific time)

Dial-in information: Please register in advance of the call <u>here</u>.

Webcast (listen-only): To listen to the webcast use the following <u>LINK</u>.

A replay of the webcast will be available via the Investors section of the GCT website at <u>investors.gctsemi.com</u>.

#### About GCT Semiconductor Holding, Inc.
GCT is a leading fabless designer and supplier of advanced 5G and 4G LTE semiconductor solutions. GCT's market-proven solutions have enabled fast and reliable 4G LTE connectivity to numerous commercial devices such as CPEs,

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mobile hotspots, routers, M2M applications and smartphones, etc., for the world's top wireless carriers. GCT's system-on-chip solutions integrate radio frequency, baseband modem and digital signal processing functions, therefore offering complete 4G and 5G platform solutions with small form factors, low power consumption, high performance, high reliability, and cost-effectiveness. For more information, visit **<u>www.gctsemi.com</u>**.

#### Cautionary Statement Regarding Forward-Looking Statements
This press release contains certain forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1955. These forward-looking statements include, without limitation, the Company's expectations with respect to its business operations; the expected timeline to commence shipment of 5G chipsets; the 5G outlook and anticipated growth of 5G markets and opportunities; the benefits of development agreements with partners; the ability for the Company to improve financial performance; the ability of the Company to raise sufficient capital to fund its operations; the ability of the Company's technology and products to address new markets and meet customer demands; the execution of go-to-market strategies; and the anticipated size of addressable markets by the Company's products. Words such as "believe," "project," "expect," "anticipate," "estimate," "intend," "strategy," "future," "opportunity," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," and similar expressions are intended to identify such forward-looking statements. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to significant risks and uncertainties that could cause the actual results to differ materially from the expected results. Most of these factors are outside the Company's control and are difficult to predict. Factors that may cause actual future events to differ materially from the expected results, include, but are not limited to: the ability of the Company to develop its 5G products and generate revenue; the ability to enter into and meet the obligations under partnership and collaboration agreements; the ability of the Company to grow and manage growth profitability and retain its key employees; the Company's financial and business performance, including the Company's financial projections and business metrics; changes in the Company's strategy, future operations, financial position, estimated revenues and losses, forecasts, projected costs, prospects and plans; the Company's inability to anticipate the future market demands and future needs of its customers; the impact of component shortages, suppliers' lack of production capacity, natural disasters or pandemics on the Company's sourcing operations and supply chain; the Company's future capital requirements and sources and uses of cash; the ability to implement business plans, forecasts, and other expectations, including the growth of the 5G market; the risk that the Company may not be able to repay its debt; the risk of economic downturns that affects the Company's business operation and financial performance; the risk that the Company may not be able to develop and design its products acceptable to its customers; actual or potential conflicts of interest of the Company's management with its public stockholders; macroeconomic conditions, including market conditions, global and economic conditions, labor disputes, inflationary impacts, and disruptions to the global supply chain; the imposition of duties and tariffs and other trade barriers and retaliatory countermeasures implemented by the U.S. and other governments; and other risks and uncertainties indicated from time to time in Company's filings with the Securities and Exchange Commission ("SEC"), including the annual report on Form 10-K, and quarterly reports on Form 10-Q, and those disclosures under the "Risk Factors" section therein. The foregoing list of factors is not exhaustive. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and the Company

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assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise.

#### Contacts:

• **Investor relations website:** <u>investors.gctsemi.com</u>

• **Investor relations contact:** Gateway Group, Ralf Esper, <u>GCT@gateway-grp.com</u>

• **Media contact:** <u>media@gctsemi.com</u>

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#### GCT Semiconductor Holding, Inc.

#### Consolidated Balance Sheets

#### (unaudited, in thousands)

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| | | |
|:---|:---|:---|
|  | **March 31, 2026** | **December 31, 2025** |
| **Assets** | | |
| &nbsp;&nbsp;&nbsp;&nbsp; Current assets: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Cash and cash equivalents | $7185 | $590 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accounts receivable, net | 2414 | 2597 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Inventory | 1558 | 947 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Contract assets | 5110 | 5432 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Prepaid expenses and other current assets | 2770 | 2318 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total current assets | 19037 | 11884 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Property and equipment, net | 2470 | 2671 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Operating lease right-of-use assets | 513 | 708 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other assets | 358 | 381 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total assets | $22378 | $15644 |
| **Liabilities and Stockholders' Deficit** |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp; Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accounts payable | $702 | $628 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Contract liabilities | 131 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accrued and other current liabilities | 21143 | 21680 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Common stock forward liability |  | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Borrowings | 52068 | 56589 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Operating lease liabilities, current | 491 | 686 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total current liabilities | 74535 | 79586 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Long-term borrowings | 661 |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Convertible promissory notes, net of current | 4964 | 6046 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net defined benefit liabilities | 7158 | 7598 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Long-term operating lease liabilities | 35 | 41 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other taxes payable | 2289 | 2265 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Warrant liabilities | 5995 | 2870 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Other liabilities | 677 | 531 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total liabilities | 96314 | 98937 |
| Commitments and contingencies (Note 7) |  |  |
| Stockholders' deficit: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Preferred stock |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Common stock | 7 | 6 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Additional paid-in capital | 538957 | 520925 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accumulated other comprehensive income | 2369 | 1181 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Accumulated deficit | (615269) | (605405) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total stockholders' deficit | (73936) | (83293) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total liabilities and stockholders' deficit | $22378 | $15644 |

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#### GCT Semiconductor Holding, Inc.

#### Consolidated Statements of Operations

#### (unaudited, in thousands, except per share amounts)

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| | | |
|:---|:---|:---|
|  | **Three Months Ended<br> March 31,** | **Three Months Ended<br> March 31,** |
|  | **2026** | **2025** |
| Net revenues: |  |  |
| &nbsp;&nbsp;&nbsp; Product | $472 | $91 |
| &nbsp;&nbsp;&nbsp; Service | 1448 | 405 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total net revenues | 1920 | 496 |
| Cost of net revenues: |  |  |
| &nbsp;&nbsp;&nbsp; Product | 895 | 207 |
| &nbsp;&nbsp;&nbsp; Service | 78 | 201 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total cost of net revenues | 973 | 408 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Gross profit | 947 | 88 |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp; Research and development | 3174 | 4096 |
| &nbsp;&nbsp;&nbsp; Sales and marketing | 1158 | 1118 |
| &nbsp;&nbsp;&nbsp; General and administrative | 2747 | 2614 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Total operating expenses | 7079 | 7828 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Loss from operations | (6132) | (7740) |
| &nbsp;&nbsp;&nbsp; Interest expense | (1809) | (1070) |
| &nbsp;&nbsp;&nbsp; Gain on foreign currency transactions, net | 2578 | 21 |
| &nbsp;&nbsp;&nbsp; Change in fair value of common stock forward liability | 3 | 295 |
| &nbsp;&nbsp;&nbsp; Change in fair value of common stock warrant liabilities | (3125) | 1649 |
| &nbsp;&nbsp;&nbsp; Change in fair value of convertible promissory notes | (1286) | (19) |
| &nbsp;&nbsp;&nbsp; Other income, net | 35 | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Loss before provision for income taxes | (9736) | (6863) |
| &nbsp;&nbsp;&nbsp; Provision for income taxes | 128 | 105 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net loss | $(9864) | $(6968) |
| Net loss per common share: |  |  |
| &nbsp;&nbsp;&nbsp; Basic and diluted | $(0.15) | $(0.15) |
| Weighted average common shares outstanding, basic and diluted | 66070 | 47606 |

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