{
 "as_of": "2026-11-08",
 "cmr": "us-cm-kg/NASDAQ/ARQ",
 "fence": "The page is the record's research on the issuer — no analyst, no rating, no view.",
 "markdown": "The page is the record's research on the issuer — no analyst, no rating, no view.\n\n# Arq, Inc. (NASDAQ: ARQ) — research page\n\nAs of 2026-11-08 · us-cm-kg · record version 1\n\n## Identity and listing\n\nThe issuer is Arq, Inc., listed on NASDAQ under ticker ARQ, with ISIN US00770C1018 and LEI 52990086HRJSW2EZQH40. Its security type is Corporate and its sector is 2890 Miscellaneous Chemical Products. Its segment and jurisdiction are not on the record. Its listing status is listed, not halted.\n\n## The disclosure read\n\nThe record holds 61 filings across 37 filing days in the window 2025-11-08 to 2026-11-08. The median gap between filing days is 6.0 days, and the latest filing is 4 days before the record date. The latest filing is a results filing dated 2026-11-04. The exchange median is 6.0 days for cadence, 52 filings and 5.0 days for latency. The sector median is 6.2 days for cadence, 56.5 filings and 3.5 days for latency.\n\n## Auditor\n\nThe auditor of record is Baker Tilly US, LLP, located in Denver, Colorado. The record holds no auditor changes.\n\n## Events and halts\n\nThe record holds one lifecycle line, a listing dated 2026-04-17. It holds no delisting, name change, domicile change or segment move lines; the domicile change and segment move are not on the record. The issuer is listed, not halted.\n\n## Orderability\n\nThe outcome is not determinable because the chapter's orderability section carries no client categories, so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04.\n\n## Coverage\n\nNo research houses were found on the issuer's investor-relations pages read. The count is 0.\n\n## Open research\n\nNo openly published research notes were found on the record. The count is 0.\n\n## Licensed\n\nLicensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.\n\n## As-of depth\n\nThe issuer's sealed years are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12.\n\n## Sources\n\n9 source pages are named on this page; every value above carries its own source page and read date in the numbers.\n\n- https://www.sec.gov/files/company_tickers_exchange.json (identity.exchange)\n- https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data (identity.isin)\n- https://mapping.gleif.org/api/v2/isin-lei/latest/download (identity.lei)\n- https://data.sec.gov/submissions/CIK0001515156.json (identity.name)\n- https://mcp.us-cm-kg.ai/events/NASDAQ/ARQ (the disclosure lines)\n- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)\n- https://www.sec.gov/Archives/edgar/data/1515156/000151515626000021/arq-20251231.htm (the auditor)\n- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)\n- https://mcp.us-cm-kg.ai/record/NASDAQ/ARQ (the record)\n",
 "market": "US",
 "node": "us-cm-kg",
 "numbers": {
  "as_of_depth": {
   "issuer_years_sealed": [
    "2021",
    "2022",
    "2023",
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   ],
   "live_record_began": "2026-09-12",
   "node_history_from": "2021-01-04",
   "node_years_sealed": [
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    "2022",
    "2023",
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   "record_version": 1,
   "sealed": true
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  "auditor": {
   "auditor": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000021/arq-20251231.htm",
    "state": "sourced",
    "value": "Baker Tilly US, LLP"
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   "auditor_firm_id": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000021/arq-20251231.htm",
    "state": "sourced",
    "value": "23"
   },
   "auditor_location": {
    "read_by": "EDGAR 10-K cover page iXBRL tag (dei:AuditorName, dei:AuditorLocation, dei:AuditorFirmId, dei:DocumentPeriodEndDate)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000021/arq-20251231.htm",
    "state": "sourced",
    "value": "Denver, Colorado"
   },
   "changes": []
  },
  "cmr": "us-cm-kg/NASDAQ/ARQ",
  "coverage": {
   "count": 0,
   "houses": [],
   "pages_checked": [
    {
     "page": "https://ir.arq.com/analyst-coverage",
     "result": "read: 0 of 5 named houses found on the page; the page does not name the issuer"
    }
   ],
   "read_by": "Perplexity sonar (search) · page read by this rail",
   "read_date": "2026-11-11",
   "since": null,
   "state": "none_found"
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  "disclosure": {
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     "issuers": 4359,
     "median_cadence_gap_days": 6,
     "median_filings": 52,
     "median_latency_days": 5,
     "name": "NASDAQ"
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    "sector": {
     "issuers": 8,
     "median_cadence_gap_days": 6.2,
     "median_filings": 56.5,
     "median_latency_days": 3.5,
     "name": "2890 Miscellaneous Chemical Products"
    }
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   "by_type": {
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    "corporate_news": 5,
    "director_change": 7,
    "directors_dealings": 31,
    "regulatory_filing": 7,
    "results": 8
   },
   "cadence_median_gap_days": 6,
   "filing_days": 37,
   "filings": 61,
   "latency_days": 4,
   "latest": [
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     "category": "8-K",
     "date": "2026-11-04",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000137/arq-20261104.htm",
     "title": "8-K — 8-K (items 2.02,9.01)",
     "type": "results"
    },
    {
     "category": "10-Q",
     "date": "2026-11-04",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000136/arq-20260930.htm",
     "title": "10-Q — 10-Q",
     "type": "results"
    },
    {
     "category": "S-8",
     "date": "2026-09-17",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000132/arqs-8sept2026.htm",
     "title": "S-8 — S-8",
     "type": "regulatory_filing"
    },
    {
     "category": "4",
     "date": "2026-09-10",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000129/xslF345X06/wk-form4_1789076013.xml",
     "title": "4 — FORM 4",
     "type": "directors_dealings"
    },
    {
     "category": "4",
     "date": "2026-09-09",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000127/xslF345X06/wk-form4_1788989543.xml",
     "title": "4 — FORM 4",
     "type": "directors_dealings"
    }
   ],
   "latest_filing_date": "2026-11-04",
   "read": "the node's event lines (list_events_since), as get_filings serves them",
   "source": "https://mcp.us-cm-kg.ai/events/NASDAQ/ARQ",
   "window": {
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    "to": "2026-11-08"
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  "identity": {
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    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "NASDAQ"
   },
   "isin": {
    "read_by": "SEC Fails-to-Deliver data (CUSIP for the symbol) · ISIN = US + CUSIP + ISO 6166 check digit",
    "read_date": "2026-10-09",
    "read_date_basis": "last_seen",
    "source": "https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data",
    "state": "sourced",
    "value": "US00770C1018"
   },
   "jurisdiction": {
    "market": "US",
    "state": "not_on_record"
   },
   "lei": {
    "read_by": "GLEIF ISIN-to-LEI mapping file (daily), LEI by exact ISIN",
    "read_date": "2026-11-08",
    "read_date_basis": "the field",
    "source": "https://mapping.gleif.org/api/v2/isin-lei/latest/download (ISIN US00770C1018)",
    "state": "sourced",
    "value": "52990086HRJSW2EZQH40"
   },
   "name": {
    "read_by": "EDGAR submissions API (issuer header as filed)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001515156.json",
    "state": "sourced",
    "value": "Arq, Inc."
   },
   "sector": {
    "read_by": "EDGAR submissions API (issuer header as filed) (SIC code as assigned by the SEC)",
    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001515156.json",
    "state": "sourced",
    "value": "2890 Miscellaneous Chemical Products"
   },
   "security_type": {
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    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://data.sec.gov/submissions/CIK0001515156.json",
    "state": "sourced",
    "value": "Corporate"
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   "segment": {
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    "state": "not_on_record"
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   "ticker": {
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    "read_date": "2026-11-08",
    "read_date_basis": "the record version as_of",
    "source": "https://www.sec.gov/files/company_tickers_exchange.json",
    "state": "sourced",
    "value": "ARQ"
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   "website": {
    "market": "US",
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  "licensed": {
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    "entitlement",
    "title",
    "date",
    "source"
   ],
   "rows": [],
   "rule": "A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded."
  },
  "lifecycle": {
   "delisting": [],
   "domicile_change": {
    "market": "US",
    "reason": "EDGAR states no dated change of state of incorporation on a filing line",
    "state": "not_on_record"
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   "listing": [
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     "date": "2026-04-17",
     "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000047/a8aashareholderrightsninth.htm",
     "title": "8-A12B/A — 8-A12B/A"
    }
   ],
   "name_change": [],
   "segment_move": {
    "market": "US",
    "reason": "the exchanges' tier transfers are not EDGAR filings",
    "state": "not_on_record"
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  "market": "US",
  "node": "us-cm-kg",
  "numbers_hash": "sha256:0ca5503d146bcbf5dc9bb740135fa43c65fcce1cb2869c096fb38190d64f5065",
  "open_research": {
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   "rows": [],
   "state": "none_found"
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  "orderability": {
   "chapter_as_of": "2026-11-04",
   "client_categories": [],
   "determinable": false,
   "read": {
    "chapter": "https://mcp.us-cm-kg.ai/book/aio.json",
    "door": "https://mcp.us-cm-kg.ai/mcp",
    "tool": "get_orderability"
   },
   "reason": "the chapter's orderability section carries no client_categories: the outcome cannot name its client category",
   "rule_version": "acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1",
   "section": "us.aio.v8"
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  "record": {
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   "url": "https://mcp.us-cm-kg.ai/record/NASDAQ/ARQ",
   "version": 1
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  "schema": "research-numbers v0.1 (USR-01, 2026-11-11)",
  "status": {
   "read_date": "2026-11-08",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts",
   "value": "listed, not halted"
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 },
 "numbers_hash": "sha256:0ca5503d146bcbf5dc9bb740135fa43c65fcce1cb2869c096fb38190d64f5065",
 "path": "/us/NASDAQ/ARQ",
 "schema": "research-page v0.1 (USR-02, 2026-11-11)",
 "sections": [
  {
   "id": "identity",
   "text": "The issuer is Arq, Inc., listed on NASDAQ under ticker ARQ, with ISIN US00770C1018 and LEI 52990086HRJSW2EZQH40. Its security type is Corporate and its sector is 2890 Miscellaneous Chemical Products. Its segment and jurisdiction are not on the record. Its listing status is listed, not halted.",
   "title": "Identity and listing"
  },
  {
   "id": "disclosure",
   "text": "The record holds 61 filings across 37 filing days in the window 2025-11-08 to 2026-11-08. The median gap between filing days is 6.0 days, and the latest filing is 4 days before the record date. The latest filing is a results filing dated 2026-11-04. The exchange median is 6.0 days for cadence, 52 filings and 5.0 days for latency. The sector median is 6.2 days for cadence, 56.5 filings and 3.5 days for latency.",
   "title": "The disclosure read"
  },
  {
   "id": "auditor",
   "text": "The auditor of record is Baker Tilly US, LLP, located in Denver, Colorado. The record holds no auditor changes.",
   "title": "Auditor"
  },
  {
   "id": "events",
   "text": "The record holds one lifecycle line, a listing dated 2026-04-17. It holds no delisting, name change, domicile change or segment move lines; the domicile change and segment move are not on the record. The issuer is listed, not halted.",
   "title": "Events and halts"
  },
  {
   "id": "orderability",
   "text": "The outcome is not determinable because the chapter's orderability section carries no client categories, so the outcome cannot name its client category. The rule version is acm-68000/us/reasonable-basis-suitability-finra-rule-2111/r1, and the chapter is as of 2026-11-04.",
   "title": "Orderability"
  },
  {
   "id": "coverage",
   "text": "No research houses were found on the issuer's investor-relations pages read. The count is 0.",
   "title": "Coverage"
  },
  {
   "id": "open_research",
   "text": "No openly published research notes were found on the record. The count is 0.",
   "title": "Open research"
  },
  {
   "id": "licensed",
   "text": "Licensed research: none loaded. A licensed row is served only to an agent whose firm holds that licence (licensor, entitlement). No licensed row is loaded.",
   "title": "Licensed"
  },
  {
   "id": "depth",
   "text": "The issuer's sealed years are 2021, 2022, 2023, 2024, 2025 and 2026. The market's earliest sealed date is 2021-01-04. The live record began on 2026-09-12.",
   "title": "As-of depth"
  },
  {
   "id": "sources",
   "text": "9 source pages are named on this page; every value above carries its own source page and read date in the numbers.",
   "title": "Sources"
  }
 ],
 "sources": [
  {
   "for": "identity.exchange",
   "source": "https://www.sec.gov/files/company_tickers_exchange.json"
  },
  {
   "for": "identity.isin",
   "source": "https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data"
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   "source": "https://mapping.gleif.org/api/v2/isin-lei/latest/download"
  },
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   "source": "https://data.sec.gov/submissions/CIK0001515156.json"
  },
  {
   "for": "the disclosure lines",
   "source": "https://mcp.us-cm-kg.ai/events/NASDAQ/ARQ"
  },
  {
   "for": "the halt flag",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts"
  },
  {
   "for": "the auditor",
   "source": "https://www.sec.gov/Archives/edgar/data/1515156/000151515626000021/arq-20251231.htm"
  },
  {
   "for": "the orderability chapter",
   "source": "https://mcp.us-cm-kg.ai/book/aio.json"
  },
  {
   "for": "the record",
   "source": "https://mcp.us-cm-kg.ai/record/NASDAQ/ARQ"
  }
 ],
 "title": "Arq, Inc. (ARQ) — research page",
 "writer": {
  "by": "Claude through the platform account, Haiku class; one pass; checked against the numbers",
  "engine": "claude-haiku-5-5"
 }
}