{
 "as_of": "2026-11-08",
 "cmr": "us-cm-kg/NASDAQ/LONA",
 "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# LeonaBio, Inc. (NASDAQ: LONA) — research page\n\nAs of 2026-11-08 · us-cm-kg · record version 1\n\n## Identity and listing\n\nThe issuer is LeonaBio, Inc., listed on NASDAQ under the ticker LONA. Its ISIN is US04746L2034 and its LEI is 529900CSS4S4X8VY5C81. Its security type is Corporate and its sector is 2836 Biological Products, (No Diagnostic Substances). Its segment and jurisdiction are not on the record. Its status is listed, not halted.\n\n## The disclosure read\n\nThe record holds 100 filings in the twelve months to 2026-11-08, across 41 filing days. The median gap between filing days is 5.0 days, and the latest filing is 4 days before the record date. The latest filing is a regulatory filing dated 2026-11-04. The NASDAQ exchange median is 6.0 days for cadence, 52 filings and 5.0 days for latency. The sector median is 5.5 days for cadence, 65.5 filings and 4.0 days for latency.\n\n## Auditor\n\nThe auditor is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The location is not on the record, and the record holds no auditor changes.\n\n## Events and halts\n\nThe record holds no listing, delisting or name change events. The domicile change is not on the record, because EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, because the exchanges' tier transfers are not EDGAR filings. The halt flag shows listed, not halted.\n\n## Orderability\n\nThe outcome is not determinable, because the chapter's orderability section carries no client categories and 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. 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 record holds sealed years 2021, 2022, 2023, 2024, 2025 and 2026 for this issuer. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.\n\n## Sources\n\n8 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/CIK0001620463.json (identity.name)\n- https://mcp.us-cm-kg.ai/events/NASDAQ/LONA (the disclosure lines)\n- https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts (the halt flag)\n- https://mcp.us-cm-kg.ai/book/aio.json (the orderability chapter)\n- https://mcp.us-cm-kg.ai/record/NASDAQ/LONA (the record)\n",
 "market": "US",
 "node": "us-cm-kg",
 "numbers": {
  "as_of_depth": {
   "issuer_years_sealed": [
    "2021",
    "2022",
    "2023",
    "2024",
    "2025",
    "2026"
   ],
   "live_record_began": "2026-09-12",
   "node_history_from": "2021-01-04",
   "node_years_sealed": [
    "2021",
    "2022",
    "2023",
    "2024",
    "2025",
    "2026"
   ],
   "record_version": 1,
   "sealed": true
  },
  "auditor": {
   "auditor": {
    "market": "US",
    "reason": "no dei:AuditorName tag on the latest annual report cover (foreign private issuers and older filings carry none)",
    "state": "not_on_record"
   },
   "auditor_firm_id": {
    "market": "US",
    "state": "not_on_record"
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   "auditor_location": {
    "market": "US",
    "state": "not_on_record"
   },
   "changes": []
  },
  "cmr": "us-cm-kg/NASDAQ/LONA",
  "coverage": {
   "count": 0,
   "houses": [],
   "pages_checked": [
    {
     "page": "https://investors.leonabio.com/stock-information/analyst-coverage",
     "result": "not readable by this rail (403)"
    }
   ],
   "read_by": "Perplexity sonar (search) · page read by this rail",
   "read_date": "2026-11-11",
   "since": null,
   "state": "none_found"
  },
  "disclosure": {
   "against": {
    "exchange": {
     "issuers": 4359,
     "median_cadence_gap_days": 6,
     "median_filings": 52,
     "median_latency_days": 5,
     "name": "NASDAQ"
    },
    "sector": {
     "issuers": 176,
     "median_cadence_gap_days": 5.5,
     "median_filings": 65.5,
     "median_latency_days": 4,
     "name": "2836 Biological Products, (No Diagnostic Substances)"
    }
   },
   "by_type": {
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    "corporate_news": 4,
    "director_change": 2,
    "directors_dealings": 48,
    "prospectus": 6,
    "regulatory_filing": 28,
    "results": 6,
    "takeover": 1
   },
   "cadence_median_gap_days": 5,
   "filing_days": 41,
   "filings": 100,
   "latency_days": 4,
   "latest": [
    {
     "category": "SCHEDULE 13G",
     "date": "2026-11-04",
     "source": "https://www.sec.gov/Archives/edgar/data/1620463/000117266126004856/xslSCHEDULE_13G_X02/primary_doc.xml",
     "title": "SCHEDULE 13G",
     "type": "regulatory_filing"
    },
    {
     "category": "4",
     "date": "2026-10-28",
     "source": "https://www.sec.gov/Archives/edgar/data/1620463/000212618626000002/xslF345X06/primary_doc.xml",
     "title": "4 — PRIMARY DOCUMENT",
     "type": "directors_dealings"
    },
    {
     "category": "SCHEDULE 13D/A",
     "date": "2026-10-28",
     "source": "https://www.sec.gov/Archives/edgar/data/1620463/000165556626000004/xslSCHEDULE_13D_X02/primary_doc.xml",
     "title": "SCHEDULE 13D/A",
     "type": "regulatory_filing"
    },
    {
     "category": "SCHEDULE 13D/A",
     "date": "2026-10-26",
     "source": "https://www.sec.gov/Archives/edgar/data/1620463/000119312526431897/xslSCHEDULE_13D_X02/primary_doc.xml",
     "title": "SCHEDULE 13D/A",
     "type": "regulatory_filing"
    },
    {
     "category": "4",
     "date": "2026-10-26",
     "source": "https://www.sec.gov/Archives/edgar/data/1620463/000119312526431896/xslF345X06/ownership.xml",
     "title": "4 — 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/LONA",
   "window": {
    "from": "2025-11-08",
    "to": "2026-11-08"
   }
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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": "2026-10-13",
    "read_date_basis": "last_seen",
    "source": "https://www.sec.gov/data-research/sec-markets-data/fails-deliver-data",
    "state": "sourced",
    "value": "US04746L2034"
   },
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    "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 US04746L2034)",
    "state": "sourced",
    "value": "529900CSS4S4X8VY5C81"
   },
   "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/CIK0001620463.json",
    "state": "sourced",
    "value": "LeonaBio, 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/CIK0001620463.json",
    "state": "sourced",
    "value": "2836 Biological Products, (No Diagnostic Substances)"
   },
   "security_type": {
    "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/CIK0001620463.json",
    "state": "sourced",
    "value": "Corporate"
   },
   "segment": {
    "market": "US",
    "state": "not_on_record"
   },
   "ticker": {
    "read_by": "EDGAR company_tickers_exchange.json (SEC list of exchange-listed filers)",
    "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": "LONA"
   },
   "website": {
    "market": "US",
    "state": "not_on_record"
   }
  },
  "licensed": {
   "columns": [
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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"
   },
   "listing": [],
   "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:dce4900ef04129b04827a85f7dae438f0f46e2e431a490d690aec8e963bf6c78",
  "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"
  },
  "record": {
   "as_of": "2026-11-08",
   "url": "https://mcp.us-cm-kg.ai/record/NASDAQ/LONA",
   "version": 1
  },
  "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:dce4900ef04129b04827a85f7dae438f0f46e2e431a490d690aec8e963bf6c78",
 "path": "/us/NASDAQ/LONA",
 "schema": "research-page v0.1 (USR-02, 2026-11-11)",
 "sections": [
  {
   "id": "identity",
   "text": "The issuer is LeonaBio, Inc., listed on NASDAQ under the ticker LONA. Its ISIN is US04746L2034 and its LEI is 529900CSS4S4X8VY5C81. Its security type is Corporate and its sector is 2836 Biological Products, (No Diagnostic Substances). Its segment and jurisdiction are not on the record. Its status is listed, not halted.",
   "title": "Identity and listing"
  },
  {
   "id": "disclosure",
   "text": "The record holds 100 filings in the twelve months to 2026-11-08, across 41 filing days. The median gap between filing days is 5.0 days, and the latest filing is 4 days before the record date. The latest filing is a regulatory filing dated 2026-11-04. The NASDAQ exchange median is 6.0 days for cadence, 52 filings and 5.0 days for latency. The sector median is 5.5 days for cadence, 65.5 filings and 4.0 days for latency.",
   "title": "The disclosure read"
  },
  {
   "id": "auditor",
   "text": "The auditor is not on the record, because the latest annual report cover carries no dei:AuditorName tag. The location is not on the record, and the record holds no auditor changes.",
   "title": "Auditor"
  },
  {
   "id": "events",
   "text": "The record holds no listing, delisting or name change events. The domicile change is not on the record, because EDGAR states no dated change of state of incorporation on a filing line. The segment move is not on the record, because the exchanges' tier transfers are not EDGAR filings. The halt flag shows 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 and 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. 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 record holds sealed years 2021, 2022, 2023, 2024, 2025 and 2026 for this issuer. The market's earliest sealed date is 2021-01-04, and the live record began on 2026-09-12.",
   "title": "As-of depth"
  },
  {
   "id": "sources",
   "text": "8 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"
  },
  {
   "for": "identity.lei",
   "source": "https://mapping.gleif.org/api/v2/isin-lei/latest/download"
  },
  {
   "for": "identity.name",
   "source": "https://data.sec.gov/submissions/CIK0001620463.json"
  },
  {
   "for": "the disclosure lines",
   "source": "https://mcp.us-cm-kg.ai/events/NASDAQ/LONA"
  },
  {
   "for": "the halt flag",
   "source": "https://www.nasdaqtrader.com/rss.aspx?feed=tradehalts"
  },
  {
   "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/LONA"
  }
 ],
 "title": "LeonaBio, Inc. (LONA) — research page",
 "writer": {
  "by": "Claude through the platform account, Haiku class; one pass; checked against the numbers",
  "engine": "claude-haiku-5-5"
 }
}