secwatch.observer — SEC 8-K summary ====================================== Issuer: Arq, Inc. (ARQ) CIK: 0001515156 Form: 8-K Filed at: 2025-06-09T23:59:59+00:00 Accession: 0001515156-25-000085 Event type: other Sentiment: neutral Materiality: 0.20 Item codes: 4.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Arq changes auditor to Baker Tilly after Moss Adams merger ---------------------------------------------------------- - Moss Adams merged with Baker Tilly effective June 3, 2025; Moss Adams resigned as auditor. - Audit committee approved Baker Tilly as successor independent registered public accounting firm. - No disagreements or reportable events occurred during Moss Adams' tenure or interim period. - Moss Adams' letter to the SEC agreeing with disclosures is filed as Exhibit 16.1. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1515156/000151515625000085/0001515156-25-000085-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1515156/000151515625000085/ades-20250603.htm HTML page: https://secwatch.observer/filing/0001515156-25-000085 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer