ARQ Shares Plunge 30% Amid Q3 EBITDA Gain and GAC Launch
By ATTN Desk · Editorial oversight: Sean Han
Introduction to ARQ Inc.
ARQ Inc. (NASDAQ: ARQ) is a diversified environmental technology company headquartered in Greenwood Village, Colorado. The company, which was previously known as Advanced Emissions Solutions, Inc., completed its acquisition of Arq Limited’s assets in February 2023 and officially rebranded to Arq, Inc. effective February 1, 2024. Arq develops and manufactures activated carbon products aimed at removing harmful chemicals and pollutants from water, land, and air, utilizing the only vertically integrated activated carbon production network in North America.
Corporate Structure and Expertise
Founded in 1996, Arq employs between 201 and 500 people across its operations. Its executive team includes Bob Rasmus, Chief Executive Officer, and Garrett Chandler, Vice President of Sales. The company’s expertise encompasses powdered activated carbon, granular activated carbon (GAC), mercury and MATS compliance, and proprietary feedstock processing. Arq’s fully integrated model—from coal waste feedstock to finished carbon products—allows for a reliable domestic supply chain and quality control throughout the production process.
Activated Carbon by Maksym Zakharyak
Developments and News
- January 23, 2024: Arq announced its corporate rebrand and ticker change from ADES to ARQ, effective before market open on February 1, 2024. This rebranding followed the February 2023 acquisition of Arq Limited assets, which aimed to expand Arq’s portfolio into technology-driven environmental solutions.
- Q3 2025 Results: In its Q3 period ending September 30, 2025, Arq reported $5.2 million of Adjusted EBITDA, marking the sixth consecutive quarter of positive Adjusted EBITDA. The company confirmed initial production and sales of its new American-made GAC product, CarbPure GAC, designed for PFAS removal in water treatment.
- November 5, 2025: ARQ shares closed at $7.36, reflecting a 5.1% increase on higher trading volume, driven by improved contract terms and growth in volume.
- November 6, 2025: ARQ shares closed at $4.42, resulting in a 30.41% decline from the previous session, with a total volume of 666,202 shares traded.
Financial and Strategic Analysis
| Metric | Value |
|---|---|
| Share Price (Nov 6, 2025 close) | $4.42 |
| 52-Week Range | $3.34 – $8.11 |
| Market Capitalization | $301.8 million |
| Price/Sales (TTM) | 2.41× |
| Price/Book (MRQ) | 1.39× |
| Beta (5Y Monthly) | 3.17 |
| Revenue (TTM) | $117.6 million |
| Net Income (TTM) | –$1.65 million |
| Profit Margin | –1.40% |
| Adjusted EBITDA (Q3 2025) | $5.2 million |
| Total Cash (MRQ) | $6.96 million |
| Total Debt/Equity (MRQ) | 17.74% |
| Levered Free Cash Flow (TTM) | –$49.4 million |
| Forward P/E | 21.41× |
Arq's negative trailing profit margin and levered free cash flow deficit are indicative of its ongoing investments in capacity expansion and research and development. Its vertical integration and domestic feedstock sourcing contribute to stability in gross margins and mitigate supply-chain risks. Future profitability will depend on the scaling of sales related to GAC products and improvements in operational efficiency.
Market Position and Industry Context
Arq operates in the environmental remediation and water treatment sectors, focusing on activated carbon solutions for industrial emissions control, potable water purification, and site remediation. As the only fully integrated North American producer of activated carbon, Arq competes with specialty chemical firms and other global carbon suppliers. Regulatory pressures on PFAS, mercury, and other contaminants support demand for high-performance carbon products. Industry peers in waste removal services and water-treatment equipment also face similar market dynamics, often depending on outsourced carbon supply.
TL;DR
On November 6, 2025, ARQ shares closed at $4.42, down 30.41%, following a previous close of $7.36 on November 5. In Q3 2025, the company reported $5.2 million of Adjusted EBITDA and initiated sales of its CarbPure GAC product for PFAS removal. With a focus on vertical integration and an expanding product line, Arq's near-term outlook relies on increasing GAC production, securing long-term supply contracts, and achieving positive free cash flow in 2026.