Arq ARQ

NASDAQ ARQ

$2.18 -0.03 (-1.36%)

At close: Sep 9, 2026 · 4:00 PM EDT

Key Stats

Market Cap91.57 Mn

P/E-1.75

P/S0.74

Div. Yield0.00

Total Debt (Qtr)30.70 Mn

Revenue Growth (1y) (Qtr)4.54

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About

Arq, Inc. is an environmental technology company that focuses on the sale of consumable air water and soil treatment solutions based primarily on activated carbon. The company manufactures and sells activated carbon products and other chemicals that capture and remove impurities contaminants and pollutants for coal fired power generation industrial water treatment and water and soil remediation markets which it collectively calls the advanced purification technologies market. Arq, Inc. owns the Five Forks Mine in Saline Louisiana which supplies lignite coal the main raw material for most of its activated carbon products. Through its acquisition of Legacy Arq the company also controls a processing facility in Corbin Kentucky that converts recovered bituminous coal fines into a purified microfine carbon powder known as Corbin Wetcake.

Arq, Inc. generates revenue primarily from the sale of its activated carbon products including powdered activated carbon granular activated carbon and colloidal carbon powder as well as other specialty chemicals used for pollution control. The company sells these consumables through its internal sales team and typically enters into customer contracts ranging from one to five years in length. Revenue is recognized as orders are fulfilled and the firm also provides technical support to help customers develop and implement compliance strategies that use its consumable solutions.

Arq, Inc. competes in the activated carbon industry against larger players such as Norit Americas which is owned by One Equity Partners and Calgon Carbon which is owned by Kuraray Co Ltd. The company asserts that its vertical integration which includes full ownership of the lignite coal mine at Five Forks gives it a cost and reliability advantage over many competitors. Arq, Inc. also highlights its proprietary activated carbon formulations and its long standing relationships with coal fired power generators as further competitive strengths.

Arq, Inc. serves coal fired power plants industrial facilities municipal and industrial water treatment plants and companies engaged in water and soil remediation. Arq, Inc. reports that its three largest customers together accounted for approximately forty two percent of its total revenue for the year ended December 31 2025.

Investment Thesis

▲ Bull case

Arq’s core PAC business demonstrated resilience and pricing power in Q1 2026, with January and February gross margins of 38% and 47% respectively, signaling a meaningful recovery from the drag of legacy GAC production costs and inventory revaluation impacts. These improving margins reflect operational normalization in the PAC segment as the company successfully disentangles its high-margin powdered activated carbon operations from the underperforming and capital-intensive granular activated carbon business. The sustained demand for PAC in mercury emissions control, despite warmer-than-normal winter conditions, underscores the noncyclical nature of this core business, which continues to generate consistent cash flow. With the company reiterating its full-year 2026 revenue guidance of $120 million to $125 million and adjusted EBITDA of $17 million to $20 million, the market may be underestimating the earnings stability and cash generation potential of PAC as a standalone, vertically integrated domestic supplier—especially as import competition wanes and domestic sourcing preferences grow due to supply chain reliability concerns. This structural shift toward domestic PAC procurement, combined with Arq’s unique position as the only fully integrated U.S. producer, creates a durable competitive advantage that is not fully reflected in current valuation multiples.
The strategic optionality embedded in Arq’s Corbin facility represents a significant, underappreciated value driver that management is actively cultivating but not yet promoting as a near-term revenue catalyst. Progress in asphalt emulsion testing with a leading U.S. paving company has shown that Arq wet cake improves both the longevity of blackness and traction in pavement—critical performance metrics for infrastructure durability and safety—advancing the technology to the next stage of live testing with municipalities and parking lots. This application leverages existing Corbin output without requiring new capital investment, turning what is currently treated as a maintenance cost center into a potential high-margin, recurring revenue stream. Furthermore, ongoing discussions with third parties regarding asset monetization, including potential feedstock uses for synthetic graphite and rare earth elements, highlight the facility’s versatility beyond traditional activated carbon markets. Since these alternatives are being evaluated in parallel with GAC optimization and require minimal incremental spend, they offer asymmetric upside: if even one pathway scales, it could meaningfully diversify revenue and improve capital efficiency without diluting shareholders.
Arq’s capital allocation discipline, reinforced by insider ownership exceeding 20% among Board and management, creates a powerful alignment with long-term shareholder value that the market may be overlooking amid near-term GAC uncertainty. The company has explicitly stated its preference for debt over equity financing, with a target leverage of up to 3x adjusted EBITDA—suggesting feasible access to ~$60 million in additional debt based on the top end of 2026 EBITDA guidance—without diluting existing shareholders. This financial flexibility, combined with the company’s demonstrated ability to complete capital projects under budget (as seen with the recent $8 million–$10 million CapEx plant turnaround), positions Arq to fund strategic initiatives internally or through non-dilutive means. Moreover, the PAC business’s confirmed capacity to generate free cash flow in 2026 and beyond provides a self-funding mechanism for growth options, reducing reliance on external capital. This stewardship mindset, where every decision is framed through maximizing intrinsic value rather than short-term appeasement, suggests that Arq is positioned to unlock value through disciplined execution rather than speculative expansion—a trait increasingly rewarded in industrials facing cyclical headwinds.

Arq’s core PAC business demonstrated resilience and pricing power in Q1 2026, with January and February gross margins of 38% and 47% respectively, signaling a meaningful recovery from the drag of legacy GAC production costs and inventory revaluation impacts. These improving margins reflect operational normalization in the PAC segment as the company successfully disentangles its high-margin powdered activated carbon operations from the underperforming and capital-intensive granular activated carbon business. The sustained demand for PAC in mercury emissions control, despite warmer-than-normal winter conditions, underscores the noncyclical nature of this core business, which continues to generate consistent cash flow. With the company reiterating its full-year 2026 revenue guidance of $120 million to $125 million and adjusted EBITDA of $17 million to $20 million, the market may be underestimating the earnings stability and cash generation potential of PAC as a standalone, vertically integrated domestic supplier—especially as import competition wanes and domestic sourcing preferences grow due to supply chain reliability concerns. This structural shift toward domestic PAC procurement, combined with Arq’s unique position as the only fully integrated U.S. producer, creates a durable competitive advantage that is not fully reflected in current valuation multiples.
The strategic optionality embedded in Arq’s Corbin facility represents a significant, underappreciated value driver that management is actively cultivating but not yet promoting as a near-term revenue catalyst. Progress in asphalt emulsion testing with a leading U.S. paving company has shown that Arq wet cake improves both the longevity of blackness and traction in pavement—critical performance metrics for infrastructure durability and safety—advancing the technology to the next stage of live testing with municipalities and parking lots. This application leverages existing Corbin output without requiring new capital investment, turning what is currently treated as a maintenance cost center into a potential high-margin, recurring revenue stream. Furthermore, ongoing discussions with third parties regarding asset monetization, including potential feedstock uses for synthetic graphite and rare earth elements, highlight the facility’s versatility beyond traditional activated carbon markets. Since these alternatives are being evaluated in parallel with GAC optimization and require minimal incremental spend, they offer asymmetric upside: if even one pathway scales, it could meaningfully diversify revenue and improve capital efficiency without diluting shareholders.
Arq’s capital allocation discipline, reinforced by insider ownership exceeding 20% among Board and management, creates a powerful alignment with long-term shareholder value that the market may be overlooking amid near-term GAC uncertainty. The company has explicitly stated its preference for debt over equity financing, with a target leverage of up to 3x adjusted EBITDA—suggesting feasible access to ~$60 million in additional debt based on the top end of 2026 EBITDA guidance—without diluting existing shareholders. This financial flexibility, combined with the company’s demonstrated ability to complete capital projects under budget (as seen with the recent $8 million–$10 million CapEx plant turnaround), positions Arq to fund strategic initiatives internally or through non-dilutive means. Moreover, the PAC business’s confirmed capacity to generate free cash flow in 2026 and beyond provides a self-funding mechanism for growth options, reducing reliance on external capital. This stewardship mindset, where every decision is framed through maximizing intrinsic value rather than short-term appeasement, suggests that Arq is positioned to unlock value through disciplined execution rather than speculative expansion—a trait increasingly rewarded in industrials facing cyclical headwinds.

▼ Bear case

Arq’s Q1 2026 performance was materially distorted by two significant, non-recurring headwinds—the $800,000 inventory revaluation charge and ~$600,000 in carryover GAC-related expenses—which management acknowledged depressed adjusted EBITDA and gross margins, yet the company’s insistence that underlying PAC performance was strong may be masking deeper vulnerabilities in its core business. While January and February PAC margins improved to 38% and 47%, the full-quarter gross margin of 34% (down from 36% YoY) reveals that the benefit of exiting GAC production was partially offset by pricing pressures and an unfavorable product mix, suggesting that PAC’s pricing power may be weaker than implied by early-month results. Furthermore, the 7% YoY revenue growth was driven solely by volume increases, not price improvement, indicating that Arq is still competing on cost rather than capturing premium pricing in its traditional markets. This dynamic raises concerns about whether the PAC business can sustain margin expansion without meaningful product differentiation or pricing leverage, especially as the company acknowledges that mercury emissions—its largest volume driver—remains subject to inverse correlation with natural gas prices, creating inherent volatility that contradicts claims of noncyclical stability.
Despite strong market fundamentals for granular activated carbon driven by PFAS regulation and tightening supply, Arq’s strategic optimization review of its GAC operations continues to lack transparency on critical path items such as capital requirements, financing structure, and expected returns—raising concerns that the project may face delays or cost overruns reminiscent of past initiatives. Management’s repeated emphasis on working with new equipment and engineering partners after prior design firm challenges suggests ongoing execution risk, particularly given that the company has yet to disclose a scoped, costed, or timed plan despite targeting an initial update in Q3 2026. The reliance on third-party validation for alternative applications like asphalt emulsion and reactivation, while encouraging, remains speculative, with management itself noting that significant revenue from asphalt is “premature to expect in the near term.” Moreover, the decision to potentially locate reactivation capacity off-site at Red River introduces additional complexity, including potential logistics costs, permitting hurdles, and capital allocation trade-offs that could dilute focus from the core PAC business. Without a clear, near-term monetization path for Corbin or GAC, the optionality remains largely theoretical and may not materialize within the investment horizon.
Arq’s balance sheet shows growing financial strain, with total debt rising to $30.2 million as of March 31, 2026—up from $28.5 million at year-end 2025—driven by increased borrowings on its MidCap Financial revolving credit facility, which was amended late in Q1 to accommodate covenant tightness from lingering GAC impacts. While management expresses confidence in accessing up to ~$60 million in additional debt based on a 3x adjusted EBITDA leverage target, this assumes sustained EBITDA at the top end of guidance ($20 million), which may be optimistic given Q1’s $2.7 million adjusted EBITDA and the company’s reliance on cost-cutting and one-time benefits to improve margins. The rising reliance on debt, coupled with only $4.7 million in unrestricted cash, increases financial fragility, especially if PAC performance fails to meet expectations or if GAC reactivation requires unexpected capital. Furthermore, the company’s stated preference for avoiding equity financing may limit its flexibility during periods of stress, potentially forcing restrictive covenants or asset sales. This leveraged approach, combined with declining working capital liquidity and the need to fund both PAC optimization and GAC turnaround, heightens the risk that Arq could face a liquidity crunch if macroeconomic conditions worsen or if implementation delays increase costs beyond current projections.

Arq’s Q1 2026 performance was materially distorted by two significant, non-recurring headwinds—the $800,000 inventory revaluation charge and ~$600,000 in carryover GAC-related expenses—which management acknowledged depressed adjusted EBITDA and gross margins, yet the company’s insistence that underlying PAC performance was strong may be masking deeper vulnerabilities in its core business. While January and February PAC margins improved to 38% and 47%, the full-quarter gross margin of 34% (down from 36% YoY) reveals that the benefit of exiting GAC production was partially offset by pricing pressures and an unfavorable product mix, suggesting that PAC’s pricing power may be weaker than implied by early-month results. Furthermore, the 7% YoY revenue growth was driven solely by volume increases, not price improvement, indicating that Arq is still competing on cost rather than capturing premium pricing in its traditional markets. This dynamic raises concerns about whether the PAC business can sustain margin expansion without meaningful product differentiation or pricing leverage, especially as the company acknowledges that mercury emissions—its largest volume driver—remains subject to inverse correlation with natural gas prices, creating inherent volatility that contradicts claims of noncyclical stability.
Despite strong market fundamentals for granular activated carbon driven by PFAS regulation and tightening supply, Arq’s strategic optimization review of its GAC operations continues to lack transparency on critical path items such as capital requirements, financing structure, and expected returns—raising concerns that the project may face delays or cost overruns reminiscent of past initiatives. Management’s repeated emphasis on working with new equipment and engineering partners after prior design firm challenges suggests ongoing execution risk, particularly given that the company has yet to disclose a scoped, costed, or timed plan despite targeting an initial update in Q3 2026. The reliance on third-party validation for alternative applications like asphalt emulsion and reactivation, while encouraging, remains speculative, with management itself noting that significant revenue from asphalt is “premature to expect in the near term.” Moreover, the decision to potentially locate reactivation capacity off-site at Red River introduces additional complexity, including potential logistics costs, permitting hurdles, and capital allocation trade-offs that could dilute focus from the core PAC business. Without a clear, near-term monetization path for Corbin or GAC, the optionality remains largely theoretical and may not materialize within the investment horizon.
Arq’s balance sheet shows growing financial strain, with total debt rising to $30.2 million as of March 31, 2026—up from $28.5 million at year-end 2025—driven by increased borrowings on its MidCap Financial revolving credit facility, which was amended late in Q1 to accommodate covenant tightness from lingering GAC impacts. While management expresses confidence in accessing up to ~$60 million in additional debt based on a 3x adjusted EBITDA leverage target, this assumes sustained EBITDA at the top end of guidance ($20 million), which may be optimistic given Q1’s $2.7 million adjusted EBITDA and the company’s reliance on cost-cutting and one-time benefits to improve margins. The rising reliance on debt, coupled with only $4.7 million in unrestricted cash, increases financial fragility, especially if PAC performance fails to meet expectations or if GAC reactivation requires unexpected capital. Furthermore, the company’s stated preference for avoiding equity financing may limit its flexibility during periods of stress, potentially forcing restrictive covenants or asset sales. This leveraged approach, combined with declining working capital liquidity and the need to fund both PAC optimization and GAC turnaround, heightens the risk that Arq could face a liquidity crunch if macroeconomic conditions worsen or if implementation delays increase costs beyond current projections.

Geographical Breakdown of Revenue (2025)

Peer group

Peer Comparison

Companies in the Specialty Chemicals

S.No.	Ticker	Company	match	Market Cap	P/E	P/S	Total Debt (Qtr)
1	GLW	Corning Inc /Ny	primary	145.18 Bn	70.00	8.56	8.47 Bn
2	ATI	Ati Inc	primary	28.28 Bn	57.85	6.00	2.19 Bn
3	Q	Qnity Electronics, Inc.	primary	26.28 Bn	43.30	5.04	4.02 Bn
4	IFF	International Flavors & Fragrances Inc	primary	21.50 Bn	73.64	2.15	5.70 Bn
5	DD	DuPont de Nemours, Inc.	primary	17.40 Bn	94.03	2.49	3.13 Bn
6	AVY	Avery Dennison Corp	primary	12.97 Bn	18.40	1.40	3.68 Bn
7	ESI	Element Solutions Inc	primary	8.73 Bn	48.84	2.77	2.12 Bn
8	EMN	Eastman Chemical Co	primary	7.82 Bn	11.71	0.88	5.98 Bn

Arq ARQ

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Investment Thesis

Geographical Breakdown of Revenue (2025)

Peer Comparison

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