Arq, Inc. (ARQ) 2025 Annual Report Summary
Business Context and Reporting Period
This Form 10-K covers the fiscal year ended December 31, 2025. Arq, Inc. is an environmental technology company specializing in activated carbon (AC) products for air, water, and soil treatment. The company operates in the Advanced Purification Technologies (APT) market, serving coal-fired power generation, industrial, and water treatment sectors. Key assets include the Five Forks Mine (lignite feedstock) in Louisiana, the Red River Plant (manufacturing), and the Corbin Facility (bituminous coal fines processing) in Kentucky.
Key Financial Metrics
| Metric | 2025 | 2024 |
|---|---|---|
| Revenue | $120.3 million | $109.0 million |
| Net Loss | $(52.6) million | $(5.1) million |
| Adjusted EBITDA | $13.2 million | $10.5 million |
| Operating Cash Flow | $(2.7) million | $10.5 million |
| Total Debt (Outstanding) | $27.4 million | $25.1 million |
| Cash and Restricted Cash | $15.0 million | $22.2 million |
| Revolving Credit Facility Availability | $1.4 million | N/A (New facility) |
Note: The 2025 Net Loss includes a non-cash impairment charge of $44.8 million.
Material Changes vs. Prior Period
- Revenue Growth: Revenue increased 10% year-over-year, driven by higher sales volumes and improved pricing, particularly in the power generation sector due to higher natural gas prices.
- Impairment Charge: The company recorded a significant $44.8 million impairment charge related to the Corbin Facility. This included a $38.1 million write-down of tangible assets and a $6.6 million write-down of intangible assets (developed technology) due to the decision to idle the facility and cease using "Corbin Wetcake" as feedstock for Granular Activated Carbon (GAC) production.
- GAC Facility Issues: While the GAC Facility at the Red River Plant was commissioned in August 2025, production was paused in December 2025 due to design flaws and feedstock variability. The company expects no material GAC revenue in fiscal year 2026.
- Operating Expenses: Research and development expenses increased 81% to $7.3 million, primarily due to feedstock consumption and testing costs for the GAC Facility. Selling, general, and administrative (SG&A) expenses decreased 21% to $22.6 million.
Guidance, Outlook, and Risks
- Strategic Pivot: Arq is transitioning away from using Corbin Wetcake for GAC production. The company is evaluating a switch to bituminous proven performance coal feedstock and conducting an engineering review to determine necessary modifications to the GAC Facility to reach nameplate capacity.
- Liquidity: Management expects current cash on hand and borrowing availability under the Revolving Credit Facility to fund operations for the next 12 months. However, the company has amended its credit facility multiple times in 2025 and 2026 to adjust borrowing bases and liquidity covenants.
- Regulatory Environment: Demand is driven by EPA regulations on PFAS and mercury emissions. The EPA extended PFAS compliance deadlines to 2031 and narrowed the scope of the rule, which may impact the timing of demand growth.
- Key Risks:
- Failure to resolve design flaws at the GAC Facility or secure additional financing for modifications.
- Dependence on coal-fired power generation, which faces competition from natural gas and renewables.
- Customer concentration: The top three customers accounted for 42% of 2025 revenue.
- Legal proceedings against the design firm for the GAC Facility are ongoing.
Investor Verification Checklist
- GAC Facility Viability: Verify the timeline and capital requirements for the engineering review and potential modifications to the GAC Facility to resume production.
- Liquidity Position: Monitor the $1.4 million remaining availability on the Revolving Credit Facility and the company's ability to meet minimum liquidity covenants.
- Corbin Facility Utilization: Assess the progress of finding alternative markets for Corbin Wetcake (e.g., asphalt, synthetic graphite) now that it is not used for GAC production.
- Customer Concentration: Review the stability of contracts with the top three customers, which represent a significant portion of revenue.
- Regulatory Impact: Track the finalization of EPA PFAS regulations and their effect on water treatment demand timelines.