Company: nLIGHT, Inc. Ticker: NASDAQ: LASR Industry: High-power lasers, directed energy, optical sensing, advanced manufacturing Source basis: 2025 Form 10-K, 2025 Proxy Statement, 2025 full-year results release, and 2026 public offering releases. Note: This is an investment research framework, not financial advice.

1. Executive Summary

nLIGHT, Inc. has increasingly shifted from being viewed primarily as an industrial and microfabrication laser company toward being a high-power laser platform company with strong exposure to aerospace & defense, directed energy, laser sensing, and advanced manufacturing. The company describes itself as a provider of high-power lasers for mission-critical directed energy, optical sensing, and advanced manufacturing applications, with products including semiconductor lasers, fiber lasers, pulsed fiber lasers, fiber amplifiers, and beam-combination/control systems. Source: SEC 2025 Form 10-K

The company operates through two reportable segments: Laser Products and Advanced Development. Laser Products is the more productized segment, while Advanced Development focuses on research, design, prototyping, custom high-power fiber lasers, beam combining, and next-generation laser technologies for government and defense applications. Source: SEC 2025 Form 10-K

2025 was a clear operating inflection year. Revenue reached $261.3 million, up 31.6% year over year; gross margin improved to 29.8% from 16.6% in 2024; operating loss narrowed to $26.6 million from $65.6 million; and net loss narrowed to $23.5 million from $60.8 million. Adjusted EBITDA also turned positive at $23.5 million, compared with negative $18.8 million in 2024. Source: SEC 2025 Form 10-K, nLIGHT FY2025 Results

The main investment debate is not whether nLIGHT has credible technology. The central question is whether the company can convert defense R&D and prototype work into repeatable, higher-margin, productized revenue. The company had $161.6 million of backlog at year-end 2025, expected to be filled within 24 months, plus $184.4 million of unfunded government contract value. However, backlog can be delayed or cancelled, and unfunded government contract value depends on future funding allocations. Source: SEC 2025 Form 10-K

2. Business Breakdown

2.1 Two Main Segments

|Segment|2025 Revenue|Revenue Mix|2025 Gross Margin|Business Meaning| |:-|:-|:-|:-|:-| |Laser Products|$179.2M|68.6%|39.2%|Productized semiconductor lasers, fiber lasers, fiber amplifiers, and beam-combination/control systems| |Advanced Development|$82.1M|31.4%|12.4%|Government and defense R&D, prototypes, custom laser systems, beam control, and advanced optics|

Laser Products has much higher gross margin than Advanced Development. In 2025, Laser Products gross margin was 39.2%, while Advanced Development gross margin was 12.4%. Therefore, the key margin-expansion question is whether Advanced Development projects can become higher-margin product deployments over time. Source: SEC 2025 Form 10-K

2.2 End-Market Revenue Mix

|End Market|2025 Revenue|Revenue Mix|YoY Change| |:-|:-|:-|:-| |Aerospace & Defense|$175.3M|67.0%|+60.0%| |Microfabrication|$47.2M|18.1%|+8.8%| |Industrial|$38.9M|14.9%|-14.8%|

Aerospace & Defense is now the dominant growth driver. The company attributed 2025 A&D growth to increased unit sales of directed-energy laser products and progress on existing development contracts. Microfabrication growth came mainly from higher semiconductor laser sales in EMEA and Asia Pacific, while Industrial declined due to lower demand for industrial fiber lasers used in cutting and welding. Source: SEC 2025 Form 10-K

3. Product & Technology Stack

3.1 Semiconductor Lasers

nLIGHT designs and manufactures semiconductor lasers across a range of power levels, wavelengths, and output fiber sizes. These semiconductor lasers are often used as integrated energy sources for OEM customers’ solid-state lasers, especially in aerospace & defense and microfabrication applications. The core building block is a gallium-arsenide compound semiconductor laser chip, and the company uses a patented multiplexed single-chip architecture. Source: SEC 2025 Form 10-K

3.2 Fiber Lasers

The company offers programmable, serviceable high-power fiber lasers used in aerospace & defense and industrial applications. These lasers use proprietary active fiber doped with rare-earth elements to amplify light from multiple semiconductor lasers into a brighter and more powerful beam. Features include programmable beam sizes and shapes, programmable waveforms, high-speed modulation, pulsed operation, back-reflection suppression, harsh-environment operation, field serviceability, and strong power stability. Source: SEC 2025 Form 10-K

3.3 Fiber Amplifiers

nLIGHT also designs and sells high-performance fiber amplifiers for aerospace & defense and industrial applications. These amplifiers are intended to deliver high power, strong beam quality, compact design, and efficient thermal performance, which are important in directed-energy and laser-sensing applications. Source: SEC 2025 Form 10-K

3.4 Advanced Development

Advanced Development focuses on research, design, and prototyping of next-generation laser technologies. It is particularly tied to directed energy and laser sensing, with capabilities in custom high-power fiber lasers, advanced beam combining, beam control, and advanced optics. Source: SEC 2025 Form 10-K

4. Financial Profile

4.1 Income Statement Snapshot

|Metric|2023|2024|2025| |:-|:-|:-|:-| |Revenue|$209.9M|$198.5M|$261.3M| |Gross Profit|$46.1M|$33.0M|$78.0M| |Gross Margin|22.0%|16.6%|29.8%| |Operating Loss|-$46.8M|-$65.6M|-$26.6M| |Net Loss|-$41.7M|-$60.8M|-$23.5M| |EPS|-$0.90|-$1.27|-$0.47|

The 2025 improvement was broad: revenue accelerated, gross margin recovered sharply, and losses narrowed meaningfully. The company’s 2025 full-year results release also reported positive Adjusted EBITDA of $23.5 million, a major improvement from negative $18.8 million in 2024. Source: SEC 2025 Form 10-K, nLIGHT FY2025 Results

4.2 Balance Sheet & Liquidity

At year-end 2025, nLIGHT had $98.7 million in cash and cash equivalents and $34.9 million in marketable securities, for a combined cash-and-securities balance of roughly $133.6 million. Total liabilities were $88.5 million. The company also had $20.0 million outstanding under its revolving line of credit. Source: SEC 2025 Form 10-K

In February 2026, nLIGHT completed a follow-on public offering. After the underwriters fully exercised their option to purchase additional shares, total gross proceeds increased to approximately $201 million before underwriting discounts, commissions, and other expenses. Source: nLIGHT 2026 Offering Release

4.3 Stock-Based Compensation

Stock-based compensation remains a meaningful dilution and valuation consideration. In 2025, total stock-based compensation expense was $33.4 million, and unrecognized stock-based compensation at year-end was $82.7 million, expected to be recognized over an average period of 2.4 years. Source: SEC 2025 Form 10-K

5. Growth Thesis

5.1 Directed Energy Commercialization

The most important growth driver is the transition of directed-energy technology from development and demonstration into production and deployment. nLIGHT’s products are used in directed-energy and laser-sensing systems, and the company highlights high-power fiber lasers as offering ultra-precise targeting, low cost per shot, and a nearly unlimited magazine relative to conventional weapons. Source: SEC 2025 Form 10-K

5.2 Conversion From R&D to Product Revenue

Advanced Development acts as a front-end technology and customer-entry channel. While this segment has lower gross margin, it can help nLIGHT become embedded in defense programs. The upside case depends on whether these development programs convert into Laser Products revenue, which carries much higher gross margin.

5.3 Product Mix Improvement

Laser Products gross margin reached 39.2% in 2025, compared with 12.4% for Advanced Development. If the mix shifts toward productized directed-energy and laser-sensing shipments, nLIGHT’s consolidated margin profile could continue to improve. Source: [SEC 2025 Form 10-K](https://www.sec.gov/Archi