When evaluating a low-NOx solution, what matters most to you?

Check out Peter Gastreich's weekly Sustainable Investing Surveyor. Company Highlight of the Week – ClearSign Technologies Corporation (CLIR). Read the full report for all the recent news, data and more! watertowerresearch.com/doc?d… $CLIR #ClearSign #CleanTech #ClimateTech #IndustrialTechnology #EnergyTransition #Decarbonization #EmissionReduction #NOxReduction #Refining #Petrochemicals #Midstream #Hydrogen #IndustrialInnovation #EnvironmentalSolutions #SustainableInvesting #SmallCapStocks #InvestorInsights #WaterTowerResearch #WTRIndex @ClearSign

Initiating Coverage: ClearSign Technologies (NASDAQ: $CLIR) — Advanced Combustion Technology Addressing a Growing NOx Compliance Market • ClearSign’s proprietary ClearSign Core™ technology is designed to reduce NOx emissions at the source, offering refiners, petrochemical facilities, and gas processors an alternative to traditional post-combustion treatment systems • The company’s opportunity is driven primarily by tightening air quality regulations, with California and the Texas Gulf Coast representing significant retrofit markets and additional potential across global industrial regions • ClearSign’s asset-light model is supported by strategic partnerships, while management continues targeting key commercial milestones including flare testing, project startups, and conversion of engineering orders into equipment shipments Read Peter Gastreich's initiation of coverage for more detail on ClearSign’s technology, market opportunity, commercial strategy, and long-term growth outlook. watertowerresearch.com/doc?d… $CLIR #IndustrialTechnology #CleanTech #EnergyTransition #EmissionsReduction #EnvironmentalTechnology #NASDAQ #Investing #WaterTowerResearch @ClearSign

We’re excited to announce the next phase of a major California refinery retrofit project featuring a total of 32 ClearSign Core™ burners. 🔥 Following successful engineering and CFD simulations, we’ve now received a purchase order to move into full-scale burner testing and demonstration at Zeeco’s Global Technology Center. This project will feature another configuration of our Core 2 technology, further expanding the applications for our ultra-low NOx burner platform across the refining industry. 🌐Read the full press release here: clearsign.com/clearsign-rece…

Is your low NOx enclosed flare limiting capacity? ClearSign has retrofitted other low NOx flares with our technology to provide reliable low emissions flaring when the previous flare burner struggled to meet emissions. In some operations, flare emissions can directly limit your total production. If you are leaving production capacity on the table because of your flare, reach out to see how a ClearSign flare can help: clearsign.com/contact 🌐

ClearSign Technologies’s latest update highlights continued commercialization progress driven by tightening NOx regulations and growing customer adoption. 🔹 Proprietary burner technology prevents NOx formation, offering a cost-advantaged solution amid tightening global regulations. 🔹 Record 4Q25 revenue ($3.7M) and strong backlog (~225 burners) reflect increasing demand from major refiners. 🔹 Key near-term catalysts - upcoming installations, demonstration events, and order conversions remain important milestones. 🔹 Don't miss CLIR at The WTR Insights Conference on Wednesday, April 15th at 3:10pm ET. Register here: event.webcasts.com/starthere… Read Peter Gastreich's full report for deeper insights into CLIR’s technology, pipeline, and growth outlook. watertowerresearch.com/doc?d… $CLIR #Energy #IndustrialTech #CleanTech #Emissions #OilAndGas #SmallCaps #Investing #WaterTowerResearch @ClearSign

ICYMI: Our CTO, Matthew Martin recently presented at the ABMA Boiler Expo. Through real-world case studies, Matt highlighted how CFD modeling can be used to predict burner–furnace interactions and estimate NOx emissions in advance. This process enables more informed design decisions, improved performance, and reduced risk during project implementation. Want to learn more? Download the presentation here: clearsign.com/wp-content/upl…

We’re less than two weeks away from one of the biggest boiler expos in the US! Come visit us at booth #814 to learn more about our full suite of boiler solutions, including the ClearSign Core™ M1, the M25, and our boiler burner offerings designed to meet a wide range of NOx requirements. Whether you’re planning an upgrade, or exploring what’s next in clean combustion, we’d love to chat! 🤝 - #ABMA #BOILER2026 @ABMABoiler

#Didyouknow we have a 3D model of our ClearSign Core™ M1 burner? Our most advanced ultra-low NOx solution to date, designed for midstream and power applications, the M1 achieves 2ppm NOx at just 3% excess O₂ without relying on metal mesh, ceramics, or external sensors. Want to see it in person? Visit us at an upcoming show: ➡️ ABMA Boiler – Nashville, TN | Mar 31-Apr 2 ➡️ Texas Environmental Trade Fair & Conference – San Antonio, TX | May 19-20

We’re proud to share that the development phase of our SBIR funded 5ppm flexible fuel burner development project with the @ENERGY @NETL_DOE is complete and has been recognized as a meaningful step forward in industrial combustion. Through this $1.65M program, we’ve significantly advanced our Flexible Fuel Ultra-Low NOx Process Burner. This was designed to allow industrial facilities the ability to seamlessly switch between natural gas and fuel blends common in refining and petrochemical plants, and up to and including 100% hydrogen. The burners enable flexible fuel use, improving operational efficiency and adaptability while maintaining sub-5 ppm NOx compliance. We’re grateful for the DOE SBIR program, and NETL for supporting this project, and technology innovation programs such as this. Read the full press release & details of the project here: lnkd.in/g2b7xJdA - #DOE #NETL #hydrogen #flexfuel #lowNOx

We’re less than a month away from one of the biggest boiler expos in the US! Come visit us at booth #814 to learn more about our full suite of boiler solutions, including the ClearSign Core™ M1, the M25, and our boiler burner offerings designed to meet a wide range of NOx requirements. Whether you’re planning an upgrade, or exploring what’s next in clean combustion, we’d love to chat! 🤝 - #lowNOX #boiler #ABMA

ICYMI: The Case for Cleaner Combustion. 🔥 Featured in @HydrocarbonEng , our Chief Technology Officer, Matthew Martin, breaks down how ClearSign Core™ M1 burners enable cost-effective ultra-low NOx compliance as a practical alternative to SCR systems. Advanced combustion solutions like ours are helping the industry reduce emissions and meet environmental goals, without sacrificing performance or budget. 📖Take another look at the article below and learn more at clearsign.com. clearsign.com/wp-content/upl…

Happy Engineering Week! ⚙️ This week is about celebrating those who take on complex challenges and turn them into real, working solutions. From early-stage combustion concepts to stable flames operating in the field, our engineers bring cleaner combustion to life. Shout out to our hardworking engineers, and thank you for all you do! 🎉 hashtag#EWeek2026 hashtag#NSPE

We’re excited to share that we’ve received an engineering order for a low-emission retrofit flare burner along with the fully enclosed system from an energy company in California’s San Joaquin Valley! 🎉 This marks our fifth flare for this customer and reflects continued confidence in our ultra-low-NOx technology and retrofit capabilities. This system is designed to integrate within their existing structure and support compliance with California’s stringent clean air standards. Read the full press release here: lnkd.in/gfEk5c7j #lowNOx #flare #enclosedcombustor #cleanair

Another major milestone achieved! 🎉 We just shipped our largest multi-burner order yet, now on its way to a Fortune 500 global chemical company on the Gulf Coast. This shipment represents months of collaboration, precision manufacturing, and coordination across teams, and we’re proud to see it leave our facility and head toward installation. ➡️Are you an operator exploring the idea of ultra-low NOx burner solutions? Let’s connect: clearsign.com/contact #lowNOx #combustion $CLIR

On the move! Our ClearSign Core™ M25 burner has officially shipped!🚚 This M25 will soon be retrofitted into a hot oil heater at a gas processing facility in West Texas, where it will deliver our ultra-low NOx performance and flexible design for a leading, multinational energy company. The M25 was developed to address a clear gap in the market, offering flexibility with the required emissions performance. Now, even more users can access our low emissions technology. From engineering to execution, it’s great to see our M-series burners making real-world impact. We can’t wait to see this unit fired up! 🔥

Read Peter Gastreich's recap from his podcast with Jim Deller, CEO of @ClearSign Technologies (NASDAQ: $CLIR). Those interested can listen to the podcast on all platforms or on our website. Links are accessible in our full report! watertowerresearch.com/doc?d… $CLIR #ClearSign #NOx #Industrial #Energy #Sustainability #SmallCap #Stocks #Investing #CapitalMarkets

Don't miss Peter Gastreich's weekly Sustainable Investing Surveyor! This week's focus company: @ClearSign Check out the full report here! watertowerresearch.com/doc?d… $CLIR $BCCEF $ASTI $CGEH $CBUTF $NBMFF $ELVA $ASYS $DCTIF $MAXN $EFOI $SAFX $NVVE $BLNK $PEV $CNEY $WKHS $BNRG $EXROF $HUSA $PLGGF

ClearSign Technologies (NASDAQ: $CLIR) takes center stage on the latest WTR Small-Cap Spotlight podcast. Hear directly from CEO Jim Deller on how ClearSign is scaling clean combustion—full episode now live with WTR hosts Tim Gerdeman and Peter Gastreich Podcast Platforms: pod.link/1693448305 Website: watertowerresearch.com/media… #ClearSign $CLIR #CleanEnergyTech #Hydrogen #EnergyTransition #IndustrialTech #WTRPodcast #SmallCapSpotlight @ClearSign

ClearSign is hiring! 🎉 We’re looking for a Development Engineer to join our team in Tulsa, OK. In this role, you’ll apply computational fluid dynamics (CFD) to develop advanced combustion systems, supported by both project engineering and hands-on testing. If you’re detail-oriented, organized, and excited about contributing to a growing team, we want to hear from you! Ready to be part of something innovative? ➡️ Apply at clearsign.com/careers or directly through our LinkedIn Jobs tab! - hashtag#Hiring hashtag#CFD hashtag#STEMjobs hashtag#Combustion