Welcome to our dedicated page for Arq SEC filings (Ticker: ARQ), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Arq, Inc. filings document the public-company records of a Delaware environmental technology issuer focused on activated carbon and related carbon products. The record includes 8-K reports for quarterly and annual operating results, investor presentation materials, executive departures and separation agreements, and amendments to a revolving credit agreement that affect borrowing availability and liquidity covenants.
Arq’s proxy and material-event filings also address board and executive compensation matters, stockholder voting, a Tax Asset Protection Plan, modifications to security-holder rights, and the exhibits tied to financing, governance and capital-structure disclosures.
Arq reports that Daniel Kaufman beneficially owns 2,191,278 shares of Common Stock, representing 5.12% of the class as reported on 03/11/2026. Kaufman reports sole voting and dispositive power over these shares.
Arq, Inc. filed its annual report describing an environmental technology business focused on activated carbon products for air, water, and soil treatment, including PFAS and mercury removal.
The company highlights setbacks at its new granular activated carbon facility, including design flaws that forced a pause in GAC production, idling of the Corbin feedstock facility, and an engineering review to decide on scale, capital needs, and economics. Arq now plans to use third‑party bituminous coal feedstock for GAC and does not expect material GAC revenue in 2026.
The report notes a $44.8 million impairment on certain Corbin Facility assets and patents, reliance on a single main manufacturing plant, and customer concentration, with the top three customers providing about 42% of 2025 revenue. Arq also outlines its revolving credit facility and term loan balances, and emphasizes that future demand depends heavily on evolving U.S. environmental regulations, especially for PFAS in drinking water and emissions from coal‑fired power plants.
Arq, Inc. reported 2025 results showing strong revenue growth but a sharp swing to loss as it pauses its granular activated carbon (GAC) ramp. Revenue reached $120.3 million, up 10% from 2024, driven by record powdered activated carbon (PAC) volumes and pricing, but a non‑cash impairment of about $45 million tied to the Corbin facility pushed full‑year net loss to $52.6 million versus a $5.1 million loss a year earlier.
Gross margin fell to 27.9% from 36.2%, mainly from GAC start‑up costs, and Q4 margin dropped to 13.6%. Adjusted EBITDA improved to $13.2 million from $10.5 million as lower SG&A and PAC strength offset part of the GAC drag. The company is idling Corbin, conducting a comprehensive GAC optimization review, and does not expect GAC production in 2026.
Leadership changes include appointing Eric Robinson as VP Operations, eliminating the COO role, and reorganizing the finance team. For 2026, Arq guides to revenue of $120–125 million and Adjusted EBITDA of $17–20 million, assuming no GAC contribution. PAC ASP is expected at $0.88–0.91 per pound on 122–125 million pounds of volume, with additional chemicals contributing 13–15% of revenue.
Arq, Inc. Chief Technology Officer Joseph M. Wong reported the vesting and settlement of performance share units and related tax withholding in common stock. On February 27, 2026, he exercised 30,225 performance share units, with the Compensation Committee determining that 40,286 PSUs vested based on performance over the three-year period ended December 31, 2025. Each vested PSU converted into one share of Arq common stock at no exercise price. To cover tax withholding from this vesting, 17,338 shares of common stock were withheld at $3.51 per share. Following these transactions, Wong’s directly held common stock position reported in the filing was 390,686 shares.
Arq, Inc. Chief Operating Officer Jeremy Williamson reported equity compensation activity involving performance share units (PSUs) and common stock. On February 27, 2026, 68,600 PSUs vested based on performance for a three-year period ended December 31, 2025, with each PSU converting into one share of common stock.
The filing shows an exercise or conversion of 51,467 PSUs and an acquisition of 68,600 shares of common stock at a stated price of $0.00 per share. To cover related tax withholding obligations upon vesting, 18,282 shares of common stock were disposed of at $3.51 per share, leaving 185,606 shares of common stock owned directly after these transactions.
Arq, Inc. general counsel Claiborne Benson reported equity award vesting and related share movements. On February 27, 2026, 28,229 performance share units vested based on performance for a three-year period ended December 31, 2025, with each unit converting into one share of common stock at no exercise price.
Following the conversion, 10,176 shares of common stock were withheld to satisfy tax withholding obligations at a price of $3.51 per share. After these transactions, Benson directly owned 100,491 shares of Arq common stock.
Arq, Inc. entered into a fourth amendment to its Revolving Credit Agreement with MidCap Funding IV Trust and other lenders. This amendment extends earlier changes to how borrowing availability is calculated and temporarily adjusts the company’s minimum liquidity covenant.
Under the revised covenant, Arq must maintain at least $2.0 million of liquidity from December 10, 2025 through March 31, 2026, increasing to $5.0 million starting April 1, 2026 and at all times thereafter. The full legal terms are contained in Amendment No. 4, filed as an exhibit.
Arq, Inc. entered into a third amendment to its Revolving Credit Agreement with MidCap Funding IV Trust and related lenders. The amendment extends prior changes to how borrowing availability is calculated and temporarily relaxes the company’s minimum liquidity requirement.
Under the revised covenant, minimum liquidity is set at $2.0 million from December 10, 2025 through February 27, 2026, increasing to $5.0 million from February 28, 2026 and at all times thereafter. This adjustment provides Arq with near‑term liquidity flexibility while re-establishing a higher long‑term threshold.
ARQ, Inc. received an updated ownership report on its common stock through Amendment No. 2 to a Schedule 13G/A. Investment manager Orin Hirschman and affiliated entities, including AIGH Capital Management LLC and AIGH Investment Partners LLC, report beneficial ownership of 2,470,950 shares.
This position represents 5.8% of ARQ’s outstanding common stock. The reporting person has sole voting and dispositive power over these shares and no shared power. The filing states the securities were acquired and are held in the ordinary course of business, not for the purpose of changing or influencing control of ARQ, Inc.
Arq, Inc. reported that it entered into a second amendment to its existing Credit, Security and Guaranty Agreement with MidCap Funding IV Trust and the lenders party to that agreement. The amendment updates how borrowing availability is calculated under the revolving credit facility and revises the company’s minimum liquidity covenant.
Under the revised covenant, the minimum liquidity required from December 10, 2025 through January 30, 2026 is set at $2.0 million. Beginning January 31, 2026 and at all times thereafter, the minimum liquidity requirement increases to $5.0 million. The full text of the amendment is filed as an exhibit for reference.