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What is CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 stock?

0I0B is the ticker symbol for CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001, listed on LSE.

Founded in and headquartered in , CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 is a company in the Producer manufacturing sector.

What you'll find on this page: What is 0I0B stock? What does CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 do? What is the development journey of CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001? How has the stock price of CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 performed?

Last updated: 2026-05-13 18:26 GMT

About CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001

0I0B real-time stock price

0I0B stock price details

Quick intro

ClearSign Technologies Corporation (NASDAQ: CLIR) is a leader in advanced industrial combustion and sensing technologies. The company specializes in decarbonization solutions, such as its patented ClearSign Core™ and ClearSign Eye™, which enhance energy efficiency and reduce nitrogen oxide (NOx) emissions for boilers and process heaters.

For the fiscal year ended December 31, 2025, ClearSign achieved record annual revenue of approximately $5.2 million, a 44% increase year-over-year. Despite significant revenue growth and commercial traction in the energy and petrochemical sectors, the company reported a net loss of $5.5 million for 2025 due to increased operational and legal expenses.

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Basic info

NameCLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001
Stock ticker0I0B
Listing marketuk
ExchangeLSE
Founded
Headquarters
SectorProducer manufacturing
Industry
CEO
Website
Employees (FY)
Change (1Y)
Fundamental analysis

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 Business Introduction

ClearSign Technologies Corporation (Nasdaq: CLIR) is an innovative technology company that specializes in designing and developing sophisticated control systems to improve the performance of industrial and commercial combustion systems. The company’s primary focus is on reducing harmful emissions—specifically Nitrogen Oxides (NOx)—and enhancing operational efficiency and safety across various energy-intensive industries.

Business Modules and Product Lines

ClearSign’s business is structured around its proprietary ClearSign Core™ (formerly Duplex™) and ClearSign Eye™ technologies. These are categorized into several key application areas:

1. Industrial Burners: ClearSign provides ultra-low NOx burner solutions for refinery process heaters and large-scale industrial boilers. Their technology allows operators to meet stringent environmental regulations (such as those in California or China) without the need for expensive post-combustion chemicals like Selective Catalytic Reduction (SCR).
2. Flare Systems: The company applies its combustion physics expertise to industrial flares, ensuring high-efficiency destruction of waste gases with minimal smoke and reduced NOx output.
3. ClearSign Eye™ Sensing: This module focuses on flame monitoring and diagnostic tools. Using advanced sensors, it provides real-time data to ensure industrial furnaces are operating safely and efficiently, preventing flame-outs or hazardous conditions.
4. Boiler Applications: ClearSign collaborates with global partners to integrate its burner technology into packaged boilers used in commercial and industrial heating.

Business Model Characteristics

ClearSign operates primarily as an Intellectual Property (IP) and Technology Integration firm. Rather than operating massive manufacturing plants, the company utilizes an "Asset-Light" model by:
- Strategic Partnerships: Licensing its technology to major established Original Equipment Manufacturers (OEMs) such as Zeeco and California Boiler.
- Engineering Services: Providing specialized design and CFD (Computational Fluid Dynamics) modeling to customize their hardware for specific client heater configurations.
- Direct Sales of Core Components: Selling the specialized "Core" tiles and sensors while allowing partners to manufacture the bulkier steel components.

Core Competitive Moat

· Proprietary Physics: Unlike traditional burners that rely on "flame cooling," ClearSign Core™ uses a unique porous ceramic or metal surface to stabilize combustion, resulting in a much shorter, cooler, and more uniform flame that prevents NOx formation at the source.
· Intellectual Property Portfolio: As of late 2023, the company holds dozens of patents covering combustion control, sensing, and unique hardware designs, creating a significant barrier to entry for competitors.
· Regulatory Alignment: Their technology achieves sub-5ppm NOx levels, which is the "gold standard" required by the most aggressive environmental agencies worldwide.

Latest Strategic Layout

ClearSign is currently transitioning from a research and development phase into a commercial scaling phase. Recent strategic moves include:
- Expansion in the Chinese Market: Partnering with local entities to address the massive demand for emission reductions in China’s industrial sectors.
- Hydrogen Transition: Developing and testing burners capable of handling high-hydrogen fuel blends, aligning the company with the global shift toward a hydrogen economy and decarbonization.

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 Development History

The history of ClearSign is characterized by a long period of fundamental scientific research followed by a pivot toward commercial partnership and global market entry.

Development Stages

1. The Founding and R&D Phase (2008 – 2013):Founded in 2008 and headquartered in Tulsa, Oklahoma, the company initially explored the use of electrodynamic fields to control flames. It went public on the Nasdaq in 2012 to fund its research into "Electrodynamic Combustion Control."

2. Technology Pivot and "Duplex" Discovery (2014 – 2018):The company discovered that while electrical fields were effective, a mechanical/physical approach using specialized surfaces (the Duplex technology) was more robust for heavy industrial use. During this period, ClearSign focused on proving the technology in test furnaces and securing its initial patent thicket.

3. Leadership Transition and Commercial Focus (2019 – 2021):Under the leadership of CEO Jim Deller, Ph.D., the company shifted from a pure R&D lab to a commercially focused entity. It rebranded its flagship technology to ClearSign Core™ and moved its headquarters to Tulsa—the global hub for combustion engineering—to be closer to partners like Zeeco.

4. Global Commercialization and Scaling (2022 – Present):The company successfully completed several high-profile installations in refineries (e.g., World Oil in California and ExxonMobil facilities). It secured multi-year collaboration agreements with global burner manufacturers and expanded its footprint into the Asian and European markets.

Analysis of Success and Challenges

Success Factors: The company’s survival is attributed to its Technical Superiority; it consistently delivers lower NOx levels than traditional competitors. Its pivot to an Asset-Light Model saved the company from the high capital expenditures of manufacturing.
Challenges: ClearSign faced a "Valley of Death" typical of hardware startups. Industrial customers (refineries) are notoriously risk-averse, meaning it took over a decade to move from lab results to "proven" industrial reliability.

Industry Introduction

ClearSign operates within the Environmental Control Systems and Industrial Combustion industries. These sectors are currently being reshaped by global "Net Zero" targets and tightening air quality standards.

Industry Trends and Catalysts

· Decarbonization: The shift toward Hydrogen and Bio-fuels requires new burner designs to manage different flame speeds and temperatures.
· Regulatory Pressure: In the US, the EPA and regional boards (like SCAQMD) are lowering allowable NOx limits to levels that traditional burners cannot reach without expensive chemical additives.
· ESG Mandates: Large oil and gas corporations are under investor pressure to reduce their carbon and nitrogen footprints, driving demand for ClearSign’s "Best Available Control Technology" (BACT).

Competitive Landscape

The industry is dominated by large, established players. However, ClearSign often acts as a technology provider to these giants rather than a direct rival.

Competitor Type Key Players Relationship to ClearSign
Global OEMs Zeeco, John Zink Hamworthy, Honeywell UOP Competitors in burner sales; Partners in technology licensing.
Environmental Tech CECO Environmental, Fuel Tech Competitors in post-combustion (SCR) solutions.
Specialized Startups Various Hydrogen-burner startups Direct competitors in the "New Energy" combustion niche.

Industry Position and Market Data

ClearSign is a Niche Disruptor. While its total revenue is currently small compared to giants like Honeywell, it holds a unique position as the "Sub-5ppm NOx" specialist.

According to market research (e.g., Grand View Research), the global industrial burner market is valued at approximately $5.5 billion to $6 billion and is expected to grow at a CAGR of ~4.5% through 2030. ClearSign’s opportunity lies in the Retrofit Market, as thousands of existing refinery heaters must be upgraded to meet new 2025-2030 environmental deadlines.

Financial data

Sources: CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 earnings data, LSE, and TradingView

Financial analysis

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 Financial Health Rating

Based on the latest financial disclosures for the fiscal year 2024 and early 2025, ClearSign Technologies Corporation (0I0B/CLIR) shows a profile of an emerging growth company with improving revenue but persistent operational losses. The company's financial health is bolstered by a significant cash injection from equity offerings in 2024, providing a necessary runway for commercialization.

Indicator Score / Status Rating Key Data (FY 2024)
Revenue Growth 85/100 ⭐⭐⭐⭐⭐ $3.6M (Up 50% YoY from $2.4M in 2023)
Liquidity & Cash 75/100 ⭐⭐⭐⭐ $14M Cash (as of Dec 31, 2024)
Profitability 40/100 ⭐⭐ Net Loss of $5.3M; Gross Margin ~31%
Solvency 80/100 ⭐⭐⭐⭐ Asset-light model; Minimal long-term debt
Overall Health Score 65/100 ⭐⭐⭐ Stable with Growth Momentum

Data Source: 2024 SEC Form 10-K and 2025 Q1 Earnings Updates. Note: Financials for 2025 reflect a 1-for-10 reverse stock split effected in March 2026.

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 Development Potential

Accelerating Commercial Roadmap

ClearSign is transitioning from a research-focused entity to a commercial-stage solution provider. In late 2024 and early 2025, the company announced record annual revenues, primarily driven by large-scale orders for its ClearSign Core™ process burners. The company has set a strategic breakeven target at approximately $16 million in annual revenue, which management estimates requires the sale of roughly 160 process burners per year.

Key Business Catalysts

1. Strategic Alliance with Zeeco: The expansion of the collaboration with Zeeco, Inc., a global leader in combustion, to launch co-branded product lines (Zeeco CS5) is a major catalyst. This partnership provides ClearSign with access to a global sales force and world-class manufacturing, significantly reducing the capital expenditure needed for expansion.
2. Hydrogen-Ready Technology: With the global shift toward decarbonization, ClearSign’s 100% hydrogen-capable flexible fuel burners have completed successful Department of Energy (DOE) testing. This positions the company to capture the burgeoning market for "green" industrial heating.
3. Regulatory Tailwinds: Stricter NOx (Nitrogen Oxides) emission standards in regions like California, Texas, and Colorado are forcing industrial operators to retrofit existing heaters. ClearSign's ability to achieve sub-5 ppm NOx levels without expensive catalytic reduction systems is a unique competitive advantage.

Expanding Product Pipeline

Beyond traditional process burners, ClearSign is diversifying into:

  • M-Series Burners: Targeting the high-volume boiler market.
  • Advanced Flare Systems: New orders in California indicate a move into integrated emission solutions beyond just burners.
  • ClearSign Eye™: Advanced sensing technology for flame monitoring and safety.

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 Upside & Risks

Investment Positives (Pros)

High Growth Trajectory: Revenue increased from $0.37M in 2022 to $3.6M in 2024, showing a clear upward trend in technology adoption.
Strengthened Balance Sheet: The 2024 equity raise of ~$13M has provided a cash cushion of $14M, reducing immediate bankruptcy risk and instilling confidence in industrial customers who require long-term support.
Blue-Chip Validations: The company has secured orders from multiple "supermajor" oil and chemical companies (e.g., projects in the Texas Gulf Coast and California refineries), validating the technology at the highest industrial levels.

Investment Risks (Cons)

Revenue Concentration: In 2024, two customers accounted for 86% of total revenue. The loss of a single major partner or project delay could significantly impact financial results.
Operational Cash Burn: Despite revenue growth, the company remains unprofitable, with a consistent net loss of over $5M annually. The "lumpy" nature of project-based revenue makes quarterly earnings unpredictable.
Dilution & Market Volatility: The recent 1-for-10 reverse stock split (March 2026) was aimed at maintaining listing requirements. Continued reliance on equity markets for funding may lead to further shareholder dilution.

Analyst insights

How do Analysts View ClearSign Technologies Corporation (CLIR/0I0B) and its Stock?

As of mid-2024, ClearSign Technologies Corporation (traded as CLIR on NASDAQ and 0I0B on the London Stock Exchange) is viewed by analysts as a high-potential, niche player in the industrial decarbonization sector. The company focuses on its proprietary ClearSign Core™ technology, which aims to reduce NOx emissions and improve energy efficiency in the refining, petrochemical, and power industries.
Wall Street’s perspective on ClearSign is currently characterized as "cautiously optimistic," focusing on the transition from a research-and-development phase to commercial scaling. Below is a detailed breakdown of the analysts' consensus:

1. Institutional Core Views on the Company

Validation of Core Technology: Analysts from firms such as H.C. Wainwright and Northland Capital Markets emphasize that ClearSign’s technology is no longer just theoretical. Following successful installations with major global entities like ExxonMobil and World Flare, analysts believe the technology's ability to meet stringent California-level emission standards without the need for expensive Selective Catalytic Reduction (SCR) systems provides a significant competitive moat.
Asset-Light Business Model: A key point of praise is ClearSign’s "asset-light" strategy. By partnering with established global manufacturers like Zeeco and California Boiler, the company avoids massive capital expenditures in manufacturing, allowing it to focus on intellectual property and engineering. Analysts view this as a pathway to high margins once volume increases.
Regulatory Tailwinds: The tightening of environmental regulations globally—specifically the EPA’s stricter NOx standards and the European Green Deal—is seen as a primary macro driver. Analysts believe ClearSign is perfectly positioned to capture the "retrofitting" market as industrial plants are forced to upgrade their combustion systems.

2. Stock Ratings and Target Prices

The market consensus for CLIR (0I0B) remains a "Buy" or "Speculative Buy" among the specialized firms that cover the micro-cap industrial sector:
Rating Distribution: As of the most recent quarterly reports in 2024, 100% of the analysts covering the stock maintain a "Buy" rating. While the coverage universe is smaller than that of large-cap stocks, the sentiment is consistently positive.
Price Targets:
Average Target Price: Analysts have set a consensus target price in the range of $4.00 to $6.00. Given the current trading price (hovering between $1.00 and $1.50 in early 2024), this represents a potential upside of over 200%.
H.C. Wainwright: Has maintained a "Buy" rating with a target of approximately $5.00, citing the company's recent progress in the Chinese market and its partnership with Rogers-Viking.
Northland Capital: Highlights the "inflection point" the company is approaching as it moves from single-unit pilots to multi-unit fleet orders.

3. Key Risk Factors Identified by Analysts

Despite the technological advantages, analysts advise caution regarding several structural risks:
Capital Requirements and Dilution: Like many pre-profit technology companies, ClearSign has a history of secondary offerings to fund operations. Analysts monitor the "cash burn" closely, noting that further equity raises might dilute current shareholders if commercial revenue doesn't scale rapidly enough in 2025.
Long Sales Cycles: The industrial sector is notoriously slow to adopt new technologies. Analysts point out that the time from a successful pilot to a master purchase agreement can take 12 to 24 months, which creates volatility in quarterly earnings and stock performance.
Execution Risk: While the technology works, the challenge lies in global logistics and the ability of partners to integrate ClearSign’s sensors and burners into diverse industrial environments without delays.

Conclusion

The consensus among financial analysts is that ClearSign Technologies (0I0B) is an "environmental ESG play" with significant upside for patient investors. While the stock remains speculative due to its micro-cap status and the need for further commercial proof-of-concept at scale, its unique ability to solve NOx emission problems at a lower cost than traditional methods makes it a compelling candidate for acquisition or significant organic growth as global emission standards tighten through 2025 and 2026.

Further research

CLEARSIGN TECHNOLOGIES CORPORATION COM USD0.0001 (0I0B) FAQ

What are the investment highlights for ClearSign Technologies (0I0B), and who are its main competitors?

ClearSign Technologies Corporation specializes in developing innovative technologies to improve the operational efficiency, energy consumption, and emissions profile of combustion systems. The primary investment highlight is its proprietary ClearSign Core™ and ClearSign Eye™ technologies, which help industrial operators meet increasingly strict environmental regulations (such as NOx reduction) without the need for costly post-combustion chemicals.
Key competitors include industrial combustion giants and emission control firms such as Honeywell UOP (Callidus), Zeeco, Inc., and John Zink Hamworthy Combustion. ClearSign distinguishes itself by offering "bolt-on" or integrated burner solutions that aim to eliminate pollutants at the source rather than treating them after formation.

Are the latest financial data for ClearSign Technologies healthy? What is the status of its revenue and net income?

According to the most recent financial filings (Q3 2023 and Year-End 2023 preliminary data), ClearSign is in a growth and commercialization phase, which means it is currently prioritizing technology deployment over immediate profitability.
For the fiscal period ending December 31, 2023, the company reported revenues of approximately $2.4 million, a significant increase compared to 2022, driven by new project installations. However, the company still reported a net loss of roughly $9.5 million due to high R&D and SG&A expenses. As of late 2023, the company maintained a cash balance of approximately $15 million (following a mid-year capital raise), providing a runway for operations into 2024, though it remains a high-risk "pre-profit" entity.

Is the current valuation of 0I0B stock high? How do its P/E and P/B ratios compare to the industry?

As ClearSign Technologies is currently reporting negative earnings, the Price-to-Earnings (P/E) ratio is not applicable (N/A). Investors typically value the company based on its Price-to-Sales (P/S) ratio or its future growth potential.
The Price-to-Book (P/B) ratio has fluctuated between 3.0x and 5.0x over the past year, which is higher than the industrial machinery sector average, reflecting the "tech-heavy" nature of its intellectual property. Compared to established peers like Honeywell, ClearSign trades at a premium relative to current revenue, signaling that the market is pricing in significant future adoption of its emission-control patents.

How has the 0I0B stock price performed over the past three months and year? Has it outperformed its peers?

Over the past twelve months, ClearSign (0I0B/CLIR) has experienced significant volatility, common for small-cap micro-cap stocks. While the stock saw a surge in mid-2023 following successful field tests in China and California, it has faced downward pressure recently due to broader market shifts away from speculative tech.
In the last three months, the stock has generally performed in line with the Russell 2000 index but has underperformed larger environmental technology firms. While peers in the "Green Tech" sector have stabilized, ClearSign remains sensitive to news regarding specific contract wins or regulatory shifts in the US and European markets.

What are the recent tailwinds or headwinds for the industry ClearSign operates in?

Tailwinds: The primary driver is the global tightening of Environmental, Social, and Governance (ESG) standards. Specifically, the EPA’s stricter mandates on NOx emissions and the European Union’s "Green Deal" create a mandatory market for ClearSign’s ultra-low emission burners.
Headwinds: High interest rates have increased the cost of capital for industrial companies, leading some potential customers to delay large-scale retrofitting projects. Additionally, the slow pace of industrial adoption for new combustion technology serves as a barrier to rapid revenue scaling.

Have any major institutions been buying or selling 0I0B stock recently?

Institutional ownership in ClearSign Technologies remains relatively modest but stable. According to recent 13F filings, firms such as Vanguard Group Inc. and BlackRock Inc. hold small positions, primarily through small-cap index funds.
Notably, mtvHoc Ltd. and other strategic private investors have participated in recent direct offerings. While there hasn't been a massive institutional "buying spree," the lack of significant institutional dumping suggests a "wait and see" approach as the company moves toward full-scale commercialization of its 5G burner technology.

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