What Changed
Price Move History
- Daily moves over 5%
- 101 252 sessions, June 5, 2025 to June 5, 2026
- Largest daily move
- +85.5% close of November 10, 2025
- 1-year change
- -75% closing prices, June 5, 2025 to June 5, 2026
- 1-month change
- -9% closing prices, May 5, 2026 to June 5, 2026
Company Description
Semilux International Ltd. (NASDAQ: SELX) is a technology company in the electronic components industry, focused on optical and 3D sensing applications. The company is domiciled in the Cayman Islands and operates through its subsidiaries, Taiwan Color Optics, Inc. ("TCO") and Semilux Ltd., a Cayman Islands exempted company with limited liability. Semilux’s ordinary shares trade on the Nasdaq market under the ticker symbol SELX.
TCO is described as an optical and 3D sensing technology company that is primarily involved in the customization, design and supply of optical components and integrated chip for various industries, including autonomous driving, intelligent lighting, and unmanned aerial vehicles. In collaboration with its clients, TCO conceptualizes and produces high precision optics and sensing modules that are specifically customized to clients’ needs for ease of integration in overall design and production. According to company disclosures, applications for TCO’s products include automotive laser headlight systems, adaptive driving beams (ADB), as well as light detection and autonomous driving systems (LiDAR).
Semilux’s business is closely linked to the development and deployment of LiDAR and ADB components and solutions. In company communications, Semilux is described as a provider of application-specific integrated circuit (ASIC), LiDAR and ADB components and solutions. TCO has undertaken the complete design of essential chips and components within LiDAR and ADB modules, including OPA, VCSEL, FMCW, ASIC and optical components. The company states that this work is intended to provide a cost-effective, calibration- and maintenance-light, scalable and reliable high-performing System-on-Chip (SoC) for these applications.
Semilux’s structure reflects its origins in a business combination. Chenghe Acquisition Co., a special purpose acquisition company (SPAC), completed a business combination with Taiwan Color Optics, Inc. and a newly formed holding company, Semilux International Ltd. Following the closing of this transaction, Semilux became the listed holding company, and its ordinary shares began trading on the Nasdaq Capital Market under the SELX symbol. TCO continues to operate as a subsidiary, bringing its experience in laser modules and components across various sectors into the combined group.
The company’s disclosures emphasize the role of its technology in autonomous driving and related safety-focused applications. Semilux and TCO highlight LiDAR and ADB technologies as central to their product and development efforts, with stated applications in automotive laser headlight systems, adaptive driving beams and autonomous driving systems. TCO also indicates plans to leverage Taiwan’s semiconductor vertical supply chain to facilitate production of chipsets used in its LiDAR and ADB products.
Semilux has also described initiatives in research and development. The company announced an R&D program with academics and scholars in universities in Taiwan to jointly develop a solid-state LiDAR module for automotive applications, focusing on Optical Phased Array (OPA) technology. The program is described as being sponsored by the National Science and Technology Council in Taiwan and intended to address weaknesses in current OPA technology for solid-state automotive LiDAR modules. Within this program, Semilux is described as working on an OPA-based chip integrated with silicon photonics circuits as an integral component in solid-state LiDAR modules.
In addition to its operational and R&D activities, Semilux has engaged in capital markets transactions. The company announced a common stock purchase agreement with White Lion Capital, LLC, described as a committed equity facility that gives Semilux the right, subject to conditions, to sell up to a specified amount of its common stock. The company has stated that it intends to use net proceeds from this arrangement for working capital to advance its ASIC, LiDAR and ADB technologies.
Semilux has also reported interactions with Nasdaq regarding continued listing requirements. Company announcements describe receiving notifications related to minimum bid price requirements, market value of listed securities requirements, and timely filing of its annual report on Form 20-F. In these communications, Semilux has stated that such notices had no immediate effect on the listing of its ordinary shares and that the company intended to monitor its status and evaluate options to regain or maintain compliance with applicable Nasdaq listing rules.
Overall, according to its public disclosures, Semilux International Ltd. presents itself as a Cayman Islands–domiciled holding company in the technology sector, with operations conducted through subsidiaries focused on optical components, 3D sensing, LiDAR and adaptive driving beam technologies for applications in autonomous driving, intelligent lighting and unmanned aerial vehicles.
Stock Performance
Semilux International Ltd. (SELX) closed at $0.3400 on June 5, 2026. Over the past 12 months, the price has lost 75.0%.
SELX Metrics & Rankings
Price returns through June 5, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Semilux International Ltd. has 8 recent news articles. Of the recent coverage, 4 articles coincided with positive price movement and 4 with negative movement. Key topics include acquisition. View all SELX news →
SEC Filings
Semilux International Ltd. has filed 10 recent SEC filings, including 7 Form 6-K, 1 Form SCHEDULE 13G/A, 1 Form SCHEDULE 13G, 1 Form 20-F. The most recent filing was submitted on May 22, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all SELX SEC filings →
Financial Highlights
Semilux International Ltd. generated $3.7M in revenue in FY2024, retaining a -23.7% gross margin, operating income reached -$5.4M (-147.0% operating margin), and net income was -$3.7M, reflecting a -100.3% net profit margin. Diluted earnings per share stood at -$0.10. The company generated $66K in operating cash flow. The current ratio was 1.07, measuring current assets divided by current liabilities.
Upcoming Events
Short Interest History
Short interest in Semilux International Ltd. (SELX) currently stands at 343.1 thousand shares, down 10.7% from the previous reporting period. Since October 2025, short interest has increased by 2114.4%.
Days to Cover History
Days to cover for Semilux International Ltd. (SELX) currently stands at 2.2 days. The ratio is the reported short interest divided by the average daily trading volume. Since October 2025, the figure has increased by 124%. Across the settlements charted above, it has ranged from 1.0 to 18.1 days.
SELX Company Profile & Sector Positioning
Semilux International Ltd. (SELX) and is listed on the NASDAQ.
Investors comparing SELX often look at related companies in the same sector, including Research Frontiers Inc (REFR), Data I/O Corp (DAIO), CPS Technologies Corp. (CPSH), Maris-Tech Ltd. (MTEK), and Sigmatron International Inc (SGMA). Comparing financial metrics, valuation ratios, and stock performance across these peers can help investors evaluate SELX's relative position within its industry.