<span item_type="fundamental" item_id="a03ba66164a5c46f914294f9ac9ca5f8" counter_id="ST/US/CLIR" env="prod"></span><span item_type="announcement" item_id="636055086488486145" env="prod"></span><p>Revenue: As of FY2025, the actual value is USD 5.2 M.</p><p></p><h4>Revenue</h4><p>ClearSign Technologies Corporation achieved record quarterly revenue of $3.7 million.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> Annual revenue increased by 44% to a record $5.2 million.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span></p><h4>Cash and Cash Equivalents</h4><p>Cash and cash equivalents were approximately $9.2 million as of December 31, 2025.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span></p><h4>Shares Outstanding</h4><p>As of December 31, 2025, there were 5,328,730 shares of ClearSign Technologies Corporation’s common stock issued and outstanding, reflecting a 1-for-10 reverse stock split effective March 16, 2026.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span></p><h4>Operational Highlights / Unique Metrics</h4><p>ClearSign Technologies Corporation received engineering orders for a total of 36 ClearSign Core™ burners for a U.S. Gulf Coast refinery and 32 ClearSign Core™ burners for a California refinery, both representing initial phases of process heater retrofits.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> The company successfully completed testing of its ClearSign Core™ Flexible Fuel, 100% Hydrogen Capable process burner (ClearSign Core™ 2) in conjunction with the U.S. Department of Energy’s National Energy Technology Laboratory (NETL) under its Small Business Innovation Research (SBIR) program.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> A fifth low-emission flare order was received for a total retrofit enclosed flare system at a production facility in California’s San Joaquin Valley, with delivery scheduled for the third quarter of 2026.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> An order was also received from a major petrochemical customer for comprehensive testing of a 100% hydrogen capable burner to map performance for future deployment.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> Additionally, ClearSign Technologies Corporation received two separate ClearSign Core™ “M” Series Burner orders from Devco Process Heaters; one has shipped and awaits installation in New Mexico, while the other has been installed and successfully started up in West Texas.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span></p><h4>Outlook / Guidance</h4><p>ClearSign Technologies Corporation anticipates its momentum will continue, supported by a strong and expanding proposal pipeline.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> The new flexible fuel ClearSign Core-2 process burner technology is expected to broaden customer applications and has already resulted in an increased backlog of orders.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span> The company’s future priorities include growing its proposal pipeline and converting these opportunities into orders.<span class="superscript" item_id="0" item_type="announcement_file" value="1" url="https://www.sec.gov/Archives/edgar/data/1434524/000110465926042017/tm2611530d1_ex99-1.htm"></span></p>

Clearsign Tech | 8-K: FY2025 Revenue: USD 5.2 M