Arq, Inc. 8-K Filing

FAQ

Key Financial Figures

• $0.001 — ich registered Common stock, par value $0.001 per share ARQ Nasdaq Global Market In
• $2.5 million — sting minimum liquidity covenant with a $2.5 million availability reserve requirement, which
• $5 million — rve requirement, which will increase to $5 million beginning in January 2027, the addition

Filing Documents

• arq-20260331.htm (8-K) — 33KB
• ex101-midcapxarqxamendmenta.htm (EX-10.1) — 1260KB
• picture1a.jpg (GRAPHIC) — 10KB
• 0001515156-26-000041.txt ( ) — 1654KB
• arq-20260331.xsd (EX-101.SCH) — 2KB
• arq-20260331_lab.xml (EX-101.LAB) — 22KB
• arq-20260331_pre.xml (EX-101.PRE) — 13KB
• arq-20260331_htm.xml (XML) — 3KB

01 Entry into a Material Definitive Agreement

Item 1.01 Entry into a Material Definitive Agreement. On March 31, 2026 , Arq, Inc. (the "Company") and certain of its subsidiaries, entered into the fifth amendment (the "Fifth Amendment") to the Credit, Security and Guaranty Agreement (the "Revolving Credit Agreement"), dated December 27, 2024, as amended on May 6, 2025, December 9, 2025, January 28, 2026, and February 27, 2026, with MidCap Funding IV Trust, in its capacity as agent, the lenders from time to time party thereto, and any entities that become party thereto as Guarantors. The Fifth Amendment provides for, among other things, the replacement of the existing minimum liquidity covenant with a $2.5 million availability reserve requirement, which will increase to $5 million beginning in January 2027, the addition of certain eligible equipment and Rolling Stock (as defined in the Revolving Credit Agreement) to the borrowing availability calculation included in the Revolving Credit Agreement, and certain amendments to the definition of Eligible Accounts to allow for higher single customer concentration until August 2026. The foregoing description of the Fifth Amendment is only a summary of its material terms and does not purport to be complete and is qualified in its entirety by reference to the full text of the Fifth Amendment, which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

01 Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit No. Description 10.1 Amendment No. 5, dated as of March 31, 2026, to Credit, Security and Guaranty Agreement, dated as of December 27, 2024, as amended, by and among Arq, Inc., certain subsidiaries of Arq, Inc., MidCap Funding IV Trust as agent, and the lenders from time to time party thereto.*, *** 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). * – Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. The Company hereby undertakes to furnish supplemental copies of any of the omitted schedules and exhibits upon request by the SEC. *** – Portions of this exhibit have been omitted pursuant to Item 601(b)(10) as information that the Company customarily and actually treats that information as private or confidential and is not material. 1

SIGNATURES

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: April 1, 2026 Arq, Inc. Registrant /s/ Robert Rasmus Robert Rasmus Chief Executive Officer 2

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