Here are 1-3 brief analogies for Advanced Emissions Solutions, Inc. (ARQ):

• Ecolab for industrial air pollution and purification solutions. (Like Ecolab helps industries with water and hygiene, ARQ provides technologies and chemicals to help heavy industries clean up their air emissions and purify air/water.)
• A specialized 3M for industrial environmental technologies and purification products. (Similar to 3M's broad range of innovative specialty materials and industrial solutions, ARQ offers specific technologies for emission reduction and activated carbon for purification.)

• CyClean Technology: A pre-combustion coal treatment process that enhances combustion and reduces emissions of nitrogen oxide and mercury from coals burned in cyclone boilers.
• M-45 and M-45-PC Technologies: Pre-combustion coal treatment technologies used to control emissions from circulating fluidized bed boilers and pulverized coal boilers.
• Activated Carbon Products: Includes powdered activated carbon (PAC) and granular activated carbon (GAC) used for various purification and contaminant removal applications.

Advanced Emissions Solutions, Inc. (ARQ) sells its products and services primarily to other companies, not individuals.

Based on the provided company description, specific names of major customer companies are not listed. However, the company clearly identifies the types of industries and operations that constitute its customer base. These major customer categories include:

• Coal-fired power generation companies and industrial boiler operators: These customers utilize ARQ's pre-combustion coal treatment technologies (CyClean, M-45, M-45-PC) to enhance combustion and reduce emissions like nitrogen oxide and mercury. They also use ARQ's mercury and other air contaminants control solutions.
• Water treatment facilities: Both municipal and industrial water treatment operations use ARQ's activated carbon products (powdered and granular) for the treatment of drinking and waste waters, including the removal of heavy metal pollutants.
• Various industrial sectors requiring purification, remediation, and emission control: This broad category encompasses a range of industries that leverage ARQ's specialty chemicals and activated carbon for applications such as industrial acid gas and odor removal, automotive gasoline emission control, soil and ground water remediation, and food and beverage process and product purifications.

Robert Rasmus

Chief Executive Officer, President & Director

Mr. Rasmus was appointed President and Chief Executive Officer of Arq (formerly Advanced Emissions Solutions, Inc.) on July 17, 2023. He is the founder and former Chief Executive Officer of Hi-Crush, Inc., a fully integrated provider of proppant and logistics services for hydraulic fracturing operations. He also co-founded and was a Managing Partner of Red Oak Capital Management. Previously, Mr. Rasmus was President of Thunderbolt Capital Corp., a venture firm focused on start-up and early-stage private equity investments, and held senior roles at Banc One Capital Markets, Inc. and First Chicago Ltd.

Stacia Hansen

Chief Accounting Officer and Principal Financial Officer

Ms. Hansen continues in her role as Chief Accounting Officer and, effective March 9, 2026, also serves as the principal financial officer of the company. She reports directly to the Chief Financial Officer (prior to the recent change).

Anthony Nathan

Vice President of Finance

Mr. Nathan was promoted to Vice President of Finance effective March 9, 2026. He has eight years of experience with Arq (ARQ) and has been crucial in managing the company's recent equity and credit financings, as well as the Arq Limited/ADES merger. In his current role, he oversees strategic planning, financial analysis, budgeting, and investor relations.

Jeremy “Deke” Williamson

Chief Operating Officer

Mr. Williamson was appointed Chief Operating Officer effective September 18, 2023.

Joe Wong

Chief Technology Officer

Mr. Wong serves as the Chief Technology Officer for Arq.

• Operational and Financial Challenges with Granular Activated Carbon (GAC) Production: Arq has encountered significant setbacks with its Granular Activated Carbon (GAC) facility, including design flaws, construction delays, and cost overruns, leading to a pause in GAC production and a substantial impairment charge of $44.8 million in 2025. This has delayed a major growth pillar for the company, and management does not expect material GAC revenue in 2026. The company is also engaged in litigation with its original engineering consultant regarding these design flaws. These issues necessitate a comprehensive engineering and process optimization review, and a failure to achieve nameplate capacity or address design flaws could jeopardize future growth and profitability.
• Reliance on Declining Coal-Fired Power Generation Market and Regulatory/ESG Pressures: Although Arq is pursuing diversification, its business heavily relies on the coal-fired power generation market, which is experiencing a gradual decline due to the increasing availability and decreasing cost of alternative energy sources like natural gas, solar, and wind. This trend could decrease demand for Arq's products. Furthermore, growing environmental, social, and governance (ESG) concerns among institutional investors may limit the company's access to capital and reduce share liquidity, particularly given its exposure to fossil fuels. Changes in environmental regulations, especially those related to emissions and substances like PFAS, also pose a risk to product demand.
• Significant Capital Requirements and Financial Instability: Arq has already exceeded its original budget for capital expenditures, with FY2025 capex reaching $9.1 million. Should further investments be necessary, the company may need to secure additional financing through equity or debt, which could dilute existing shareholders. The company has reported financial losses, including a GAAP loss per share of $1.20 for Q4 2025, and issued 2026 revenue guidance below analyst expectations, indicating ongoing financial distress and impacting investor confidence. The stock has also experienced significant volatility.

The clear emerging threat to Advanced Emissions Solutions, Inc. (ARQ) is the ongoing and accelerating global transition away from coal-fired power generation. A significant portion of ARQ's business, particularly its Refined Coal segment and associated emission control technologies, is directly tied to the continued operation of coal-fired power plants. As power grids increasingly shift towards renewable energy sources and natural gas, the demand for technologies designed to reduce emissions from coal combustion will diminish, potentially rendering a core part of ARQ's offerings obsolete over time.

Advanced Emissions Solutions, Inc. (ARQ) operates in several addressable markets related to environmental technologies and specialty chemicals.

Activated Carbon Market

The global activated carbon market was estimated at approximately USD 4.07 billion in 2025 and is projected to reach around USD 5.50 billion by 2033, growing at a Compound Annual Growth Rate (CAGR) of 4.0% from 2026 to 2033. Other estimates place the global activated carbon market at over USD 5.58 billion in 2025, poised to exceed USD 13.45 billion by 2035, with a CAGR of 9.2% from 2026 to 2035. Another report estimates the global market size at USD 9.2 billion in 2025, projected to reach USD 16.4 billion by 2036, expanding at a CAGR of 11.2% from 2026 to 2036.

For the United States, the activated carbon market is projected to reach USD 2.00 billion by 2032. Another source indicates the U.S. activated carbon market was valued at USD 1.21 billion in 2024, with a CAGR of 8.8% from 2025–2034. The North American activated carbon market was estimated at USD 990.6 million in 2023 and is expected to grow to USD 1.27 billion by 2030, at a CAGR of 3.6% from 2024 to 2030.

Industrial Air Pollution Control Solutions Market

The global industrial air pollution control solutions market is substantial, expected to grow from USD 83.41 billion in 2025 to USD 88.18 billion in 2026 and is forecast to reach USD 116.46 billion by 2031, with a CAGR of 5.72% over 2026-2031. Another report states the global air pollution control systems market size reached USD 94.9 billion in 2025 and is expected to reach USD 158.0 billion by 2034, exhibiting a CAGR of 5.66% during 2026-2034. North America represents a significant portion of this market, holding approximately 40% of the global market share. The U.S. air pollution control equipment market was valued at USD 18.5 billion in 2023 and is anticipated to grow at a CAGR of over 5.1% from 2024 to 2032.

Activated Carbon for Mercury Control Market

A specialized segment, the global activated carbon mercury control market, was valued at USD 1.3 billion in 2025 and is projected to grow from USD 1.38 billion in 2026 to USD 2.27 billion by 2034, exhibiting a CAGR of 6.41% during the forecast period. Power generation is a dominant end-use industry in this segment, accounting for 45% of the market share.

Arq (NASDAQ: ARQ) anticipates several key drivers for its future revenue growth over the next two to three years, primarily stemming from the robust performance of its core powdered activated carbon (PAC) business and increasing demand driven by environmental regulations.

Here are the expected drivers of future revenue growth:

1. Sustained Strength and Pricing Power in Powdered Activated Carbon (PAC) Business: Arq's PAC business has demonstrated consistent strength, serving as the primary driver for its record revenue in fiscal year 2025, which increased 10% year-over-year to approximately $120.3 million. The company has consistently achieved enhanced contract terms, including average selling price (ASP) growth for its PAC products, with a 7% year-over-year increase reported in Q3 2025. This trend of strong PAC volumes, improved product mix, and continued pricing strength is expected to persist through 2026.
2. Increased Demand Driven by Environmental Regulations: New and anticipated environmental regulations, particularly those concerning PFAS (per- and polyfluoroalkyl substances) in drinking water, are expected to significantly boost demand for Arq's activated carbon products. As the only fully domestic vertically integrated activated carbon producer in the United States, Arq is uniquely positioned to benefit from these regulations, which will drive market growth for its existing and future purification solutions.
3. Expansion into New and Adjacent Markets: Arq is actively focusing on broadening its market reach by expanding into adjacent markets and developing new products with enhanced pricing strategies. This diversification is aimed at reducing reliance on traditional markets and capturing higher-margin opportunities within the activated carbon sector, including applications in industrial acid gas and odor removal, automotive gasoline emission control, and soil and groundwater remediation, in addition to its established water treatment markets.
4. Eventual Successful Commercialization of Granular Activated Carbon (GAC): While Arq has temporarily paused its Granular Activated Carbon (GAC) production to conduct a comprehensive engineering and process optimization review, the successful resolution of these challenges and the eventual ramp-up of GAC production remain a significant long-term revenue growth driver. Management is committed to optimizing the GAC line, and once operational, it is expected to contribute to future revenue growth, especially given the strong market demand for activated carbon. However, the company does not anticipate material GAC revenue in 2026.

Share Repurchases

• On August 12, 2025, the Board terminated the existing stock repurchase plan.

Share Issuance

• In February 2023, Advanced Emissions Solutions, Inc. (now Arq) issued common stock and a newly created series of preferred stock in exchange for 100% of the equity interests in all subsidiaries of Arq Limited as part of a merger.
• A private placement of approximately $15.4 million of common stock was made concurrently with the merger from certain significant Arq shareholders and members of Arq management at a price of $4.00 per share.
• The company intended to increase its authorized shares of common stock from 100 million to 125 million, subject to shareholder approval, as part of the merger with Arq Limited.

Inbound Investments

• Advanced Emissions Solutions, Inc. completed the acquisition of all subsidiaries of Arq Limited on February 1, 2023.
• A private placement of approximately $15.4 million of common stock was made by certain significant Arq shareholders and management during the merger.
• A $10.0 million term debt facility was obtained by ADES concurrent with the merger with Arq Limited.

Capital Expenditures

• For the full year 2025, Arq's capital expenditure forecast remained between $8 million and $12 million, with actual capital expenditures reaching $9.1 million for the year.
• Capital expenditures in the first quarter of 2025 totaled $3.7 million.
• The primary focus of recent and planned capital expenditures includes the commissioning of the first Granular Activated Carbon (GAC) line at the Red River facility and targeting a final investment decision for a second GAC line before the end of 2025. The company also plans an $8-10 million investment in a purpose-built thermal oxidizer.