ClearSign Technologies Corporation (CLIR)

ClearSign Technologies Corp. underwent a 1-for-10 reverse stock split effective March 16, 2026, to regain Nasdaq compliance. The company announced on March 30, 2026, that it had regained compliance with the Nasdaq Capital Market's minimum bid price requirement. On March 11, 2026, ClearSign announced successful testing of its ClearSign Core Flexible Fuel process burner. In March 2026, ClearSign provided preliminary Q4 and full-year 2025 results, expecting revenue of approximately $3.6 million and $5.2 million, respectively. On November 14, 2025, ClearSign Technologies issued its Q3 2025 earnings, reporting an EPS of -$0.30, which beat the consensus estimate of -$0.40. In March 2026, ClearSign received an engineering order for a fifth low-emission retrofit enclosed flare burner system. Between March 19, 2025, and March 18, 2026, the share price declined by 51.72%.

There is no explicit information indicating specific demand seasonality for ClearSign Technologies Corp.'s products and services. The company's focus on global expansion and addressing growing demand for emissions control technologies suggests a broader market trend rather than distinct seasonal fluctuations.

ClearSign Technologies Corp. specializes in advanced combustion systems and emissions control solutions. The company operates within the Industrials sector, focusing on Pollution & Treatment Controls and Industrial Machinery industries. Its core business involves designing and developing products and technologies for decarbonization and improving the performance of industrial and commercial systems. Major products include ClearSign Core™ burner technology, process burners, boiler burners, flaring burners, ClearSign Eye™ flame sensor, Duplex Burner Architecture, and Electrodynamic Combustion Control. The company serves various sectors, including energy, institutional, commercial and industrial boiler, chemical, and petrochemical industries.

ClearSign Technologies Corp. conducts business in the United States, the People's Republic of China, and Hong Kong. The company has also been focused on global expansion, particularly in Asia, where demand for emissions control technologies is growing, and aims to penetrate new markets in regions with stringent environmental regulations such as Europe. Its headquarters are located in Tulsa, Oklahoma.

ClearSign Technologies has been actively building its reputation as a technology solutions provider and expanding its sales channels. In December 2024, ClearSign expanded its collaboration with Zeeco, Inc., to launch a co-branded process burner line. The successful testing of its flexible fuel burner with the U.S. Department of Energy in March 2026 enhances its reputation in decarbonization technologies. The company achieved record annual revenue of $3.6 million in 2024. A major Gulf Coast refinery installed ClearSign's flame sensor technology in early 2025. ClearSign's burners are positioned to meet new and anticipated stringent NOx regulations. However, a downward revision of 2025 revenue expectations and a projected EBITDA loss could impact market perception.

ClearSign Technologies Corporation has a mix of institutional and individual owners. As of March 26, 2026, there were 43 institutional owners holding a total of 4,477,252 shares. Institutional ownership accounts for 8.38% of the company's shares outstanding, while insider ownership stands at 4.7%. Major institutional owners include Vanguard Group Inc., Simon Quick Advisors, Llc., and Geode Capital Management, Llc., among others. Significant individual insider owners include Robert Thurston Hoffman Sr. and John M. Pasquesi.