{
 "ticker": "DUOL",
 "name": "Duolingo",
 "url": "https://grantbishop.pages.dev/index/DUOL",
 "sells": "Duolingo sells a language-learning app that uses artificial intelligence.",
 "why": "We follow it because it may gain indirectly as AI spreads through the businesses it serves.",
 "questions": [
  {
   "slug": "ai-spreads",
   "question": "Who may gain as AI spreads through other businesses?",
   "url": "https://grantbishop.pages.dev/index/q/ai-spreads"
  }
 ],
 "tests": [
  {
   "id": "W-7",
   "claim": "Businesses keep adopting AI, but the economy-wide productivity lift does not arrive before 2028.",
   "url": "https://grantbishop.pages.dev/claims/ai-productivity-not-before-2028"
  }
 ],
 "reports_next": null,
 "latest_disclosed": {
  "form": "10-Q",
  "filed": "2026-08-06",
  "period": "2026-06-30",
  "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026053603/duol-20260630.htm"
 },
 "disclosed": [],
 "check": "Checked against the company's own business description in its latest annual filing.",
 "log": [
  {
   "date": "2026-10-19",
   "note": "Entry rewritten in plain words: what the company sells, and why we follow it."
  },
  {
   "date": "2026-10-12",
   "note": "Verified against the 10-Q filed 2026-08-06 at launch."
  }
 ],
 "living_report": {
  "report": false,
  "last_revised": null,
  "next_disclosure": null,
  "timeline": [
   {
    "form": "10-Q",
    "filed": "2026-11-04",
    "period": "2026-09-30",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026069692/duol-20260930.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "8-K",
    "filed": "2026-11-03",
    "period": "2026-11-03",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026069474/duol-20261103.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "8-K",
    "filed": "2026-08-19",
    "period": "2026-08-18",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026057818/duol-20260818.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "8-K",
    "filed": "2026-08-10",
    "period": "2026-08-10",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026055015/duol-20260810.htm",
    "what_it_said": null,
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   },
   {
    "form": "10-Q",
    "filed": "2026-08-06",
    "period": "2026-06-30",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026053603/duol-20260630.htm",
    "what_it_said": null,
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   },
   {
    "form": "8-K",
    "filed": "2026-08-05",
    "period": "2026-08-05",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026053299/duol-20260805.htm",
    "what_it_said": null,
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   },
   {
    "form": "8-K",
    "filed": "2026-06-05",
    "period": "2026-06-03",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026041280/duol-20260603.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "10-Q",
    "filed": "2026-05-05",
    "period": "2026-03-31",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026029976/duol-20260331.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "8-K",
    "filed": "2026-05-04",
    "period": "2026-05-04",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026029790/duol-20260504.htm",
    "what_it_said": null,
    "from_piece": null
   },
   {
    "form": "8-K/A",
    "filed": "2026-02-27",
    "period": "2026-02-26",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026012513/duol-20260226.htm",
    "what_it_said": null,
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   },
   {
    "form": "10-K",
    "filed": "2026-02-27",
    "period": "2025-12-31",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026012494/duol-20251231.htm",
    "what_it_said": null,
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   },
   {
    "form": "8-K",
    "filed": "2026-02-26",
    "period": "2026-02-26",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026012246/duol-20260226.htm",
    "what_it_said": null,
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   },
   {
    "form": "8-K",
    "filed": "2026-01-12",
    "period": "2026-01-08",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026001730/duol-20260108.htm",
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   },
   {
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    "period": "2025-09-30",
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   },
   {
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    "period": "2025-11-05",
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   },
   {
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    "period": "2025-06-30",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000168/duol-20250630.htm",
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   },
   {
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   },
   {
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    "filed": "2025-06-13",
    "period": "2025-06-11",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000129/duol-20250611.htm",
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   },
   {
    "form": "10-Q",
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    "period": "2025-03-31",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000100/duol-20250331.htm",
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   },
   {
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    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000098/duol-20250501.htm",
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   },
   {
    "form": "10-K",
    "filed": "2025-02-28",
    "period": "2024-12-31",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000042/duol-20241231.htm",
    "what_it_said": null,
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   },
   {
    "form": "8-K",
    "filed": "2025-02-27",
    "period": "2025-02-27",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208825000039/duol-20250227.htm",
    "what_it_said": null,
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   },
   {
    "form": "10-Q/A",
    "filed": "2024-12-16",
    "period": "2024-09-30",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208824000289/duol-20240930.htm",
    "what_it_said": null,
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   },
   {
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    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208824000276/duol-20241205.htm",
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   },
   {
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    "period": "2024-09-30",
    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208824000250/duol-20240930.htm",
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   },
   {
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    "url": "https://www.sec.gov/Archives/edgar/data/1562088/000156208824000248/duol-20241106.htm",
    "what_it_said": null,
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   }
  ],
  "history": []
 },
 "market": {
  "rule": "Each figure is kept only where Massive and Yahoo agree on it to the cent; a figure they do not agree on is null. Dated, not live. The market value and the forward multiple are computed from the close.",
  "last_close": {
   "value": 160.42,
   "currency": "USD",
   "as_of": "2026-11-06",
   "providers": [
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    "Yahoo"
   ]
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   "high": 161.48,
   "currency": "USD",
   "as_of": "2026-11-06",
   "providers": [
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    "Yahoo"
   ]
  },
  "range_52_week": {
   "low": 87.89,
   "low_date": "2026-04-09",
   "high": 213.37,
   "high_date": "2025-12-09",
   "sessions": 251,
   "currency": "USD",
   "as_of": "2026-11-06",
   "providers": [
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    "Yahoo"
   ]
  },
  "market_value": null,
  "forward_multiple": null,
  "checked_at": "2026-11-10 02:15:40"
 },
 "exhibits": null,
 "mentions": [],
 "note": "Prices on this page are dated market records, shown free during the preview, each confirmed by two independent data providers. None is a recommendation.",
 "license": "Free to cite with a link."
}