Arq, Inc. 8-K Filing

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Key Financial Figures

• $0.001 — ich registered Common stock, par value $0.001 per share ARQ Nasdaq Global Market In
• $2.0 million — mber 10, 2025, through January 30, 2026 $2.0 million January 31, 2026, and at all times the
• $5.0 million — y 31, 2026, and at all times thereafter $5.0 million The foregoing description of the Seco

Filing Documents

• ades-20251209.htm (8-K) — 36KB
• ex101-midcapxarqxamendment.htm (EX-10.1) — 63KB
• 0001515156-25-000151.txt ( ) — 225KB
• ades-20251209.xsd (EX-101.SCH) — 2KB
• ades-20251209_lab.xml (EX-101.LAB) — 22KB
• ades-20251209_pre.xml (EX-101.PRE) — 13KB
• ades-20251209_htm.xml (XML) — 3KB

01 Entry into a Material Definitive Agreement

Item 1.01 Entry into a Material Definitive Agreement. On December 9, 2025 , Arq, Inc. (the "Company") and certain of its subsidiaries, entered into the second amendment (the "Second Amendment") to the Credit, Security and Guaranty Agreement (the "Revolving Credit Agreement"), dated December 27, 2024, as amended on May 6, 2025, 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 Second Amendment provides for, among other things, amendments to the borrowing availability calculation included in the Revolving Credit Agreement, and an update to the Company's minimum liquidity covenant providing for decreased minimum liquidity required for the date range shown in the table below: Applicable Dates Minimum Liquidity Required December 10, 2025, through January 30, 2026 $2.0 million January 31, 2026, and at all times thereafter $5.0 million The foregoing description of the Second 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 Second 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. 2, dated as of December 9 , 2025 , to Credit, Security and Guaranty Agreement, dated as of December 27, 2024 and as amended on May 6, 2025, 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). *** – 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: December 11, 2025 Arq, Inc. Registrant /s/ Robert Rasmus Robert Rasmus Chief Executive Officer 2

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