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Duolingo8-K: Backlog growth

Duolingo accidentally reveals strong DAU growth of 27.4% in August

What happened

The company inadvertently disclosed a preliminary estimate of 27.4% year-over-year growth in Daily Active Users (DAUs), indicating rapid user base expansion.

Source

SEC EDGARAug 18, 2026

Current report (Form 8-K)

Duolingo 8-K

Filing excerpt

information indicating that the DAU growth rate onAugust 17, 2026 was estimated to be 27.4% relative to the comparable day of the prior year and therehad been similar estimated growth rates for the previous days in August.

sec.gov/Archives/edgar/data/1562088/000162828026057818/duol-20260818.htmRead the full source

Other signals in this filing (1)

Extracted by Autobound

From the Signal API record
Signal
8-K: Backlog growth

What this signalsFilings often name leadership changes, deals and spending plans.

Form
8-K
Fiscal year end
08/18
Filed
Aug 18, 2026

The full record

From the Signal API record

Numbers

Percent
27.4% (Estimated year-over-year DAU growth rate on August 17, 2026)

Details

CIK
1562088
Accession number
0001628280-26-057818
Timeframe
Current quarter
Filing year
2026
Why it matters
Capacity/fulfillment needs
Signal category
Revenue

Extraction

Confidence
High
Relevance
80%
Sentiment
Positive
Detected
Aug 25, 2026
signal_type
sec-8k
signal_subtype
backlogGrowth

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The API returns more than this page shows

This page shows a preview. The full sec-8k record in the Signal API and MCP can also have these 8 fields. Some fields are empty for some signals.

Company

  • linkedin_urlValue in the API
  • industriesValue in the API
  • employee_count_lowValue in the API
  • employee_count_highValue in the API
  • revenueValue in the API
  • descriptionValue in the API

Signal

  • signal_nameValue in the API
  • associationValue in the API
Show the full JSONThe record on this page and the API request

GET /v1/signals/1212d7a3-9cbb-45ab-97f0-fad4a61ac3d8 returns this record as JSON. POST /v1/companies/enrich returns every signal for duolingo.com.

{
  "signal_id": "1212d7a3-9cbb-45ab-97f0-fad4a61ac3d8",
  "signal_type": "sec-8k",
  "signal_subtype": "backlogGrowth",
  "detected_at": "2026-08-25T07:04:23.412+00:00",
  "company": {
    "name": "Duolingo",
    "domain": "duolingo.com"
  },
  "data": {
    "detail": "The company inadvertently disclosed a preliminary estimate of 27.4% year-over-year growth in Daily Active Users (DAUs), indicating rapid user base expansion. This level of growth creates pressure to scale infrastructure, analytics, and user engagement systems to maintain performance and capitalize on momentum.",
    "metrics": {
      "pct": 27.4,
      "timeframe": "current_quarter",
      "pct_context": "Estimated year-over-year DAU growth rate on August 17, 2026"
    },
    "summary": "Duolingo accidentally reveals strong DAU growth of 27.4% in August",
    "excerpts": "information indicating that the DAU growth rate onAugust 17, 2026 was estimated to be 27.4% relative to the comparable day of the prior year and therehad been similar estimated growth rates for the previous days in August.",
    "relevance": 0.8,
    "sentiment": "positive",
    "confidence": "high",
    "source_url": "https://www.sec.gov/Archives/edgar/data/1562088/000162828026057818/duol-20260818.htm",
    "filing_date": "2026-08-18",
    "filing_year": 2026,
    "fiscal_year_end": "08/18",
    "sales_relevance": "Capacity/fulfillment needs",
    "signal_category": "revenue"
  }
}

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