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DUOL research notebook

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SEC submissions · retrieved 2026-10-23 · 8022 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-10-10 · 0001628280-26-065790

  2. 4 · Ownership change

    Report date 2026-10-10 · 0001628280-26-065789

  3. 4 · Ownership change

    Report date 2026-10-10 · 0001628280-26-065788

  4. 4 · Ownership change

    Report date 2026-10-10 · 0001628280-26-065787

  5. 4 · Ownership change

    Report date 2026-10-07 · 0001628280-26-065528

  6. 4 · Ownership change

    Report date 2026-09-24 · 0001628280-26-063709

  7. 4 · Ownership change

    Report date 2026-09-21 · 0001628280-26-063251

  8. 4 · Ownership change

    Report date 2026-09-16 · 0001628280-26-062790

  9. 8-K · Current report

    Report date 2026-08-18 · 0001628280-26-057818 · Items 7.01

  10. 8-K · Current report

    Report date 2026-08-10 · 0001628280-26-055015 · Items 5.02,7.01,9.01

  11. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001628280-26-053603

  12. 8-K · Current report

    Report date 2026-08-05 · 0001628280-26-053299 · Items 2.02,9.01

  13. 8-K · Current report

    Report date 2026-06-03 · 0001628280-26-041280 · Items 5.07

  14. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001628280-26-029976

  15. 8-K · Current report

    Report date 2026-05-04 · 0001628280-26-029790 · Items 2.02,9.01

  16. DEF 14A · Proxy statement

    Report date 2026-04-17 · 0001628280-26-025728

  17. 8-K/A · Current report

    Report date 2026-02-26 · 0001628280-26-012513 · Items 2.02,9.01

  18. 10-K · Annual report

    Report date 2025-12-31 · 0001628280-26-012494

  19. 8-K · Current report

    Report date 2026-02-26 · 0001628280-26-012246 · Items 2.02,8.01,9.01

  20. 8-K · Current report

    Report date 2026-01-08 · 0001628280-26-001730 · Items 2.02,5.02,9.01

  21. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001628280-25-049743

  22. 8-K · Current report

    Report date 2025-11-05 · 0001628280-25-049514 · Items 2.02,9.01

  23. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001562088-25-000168

  24. 8-K · Current report

    Report date 2025-08-06 · 0001562088-25-000165 · Items 2.02,9.01

  25. 8-K · Current report

    Report date 2025-06-11 · 0001562088-25-000129 · Items 5.07

  26. 10-Q · Quarterly report

    Report date 2025-03-31 · 0001562088-25-000100

  27. 8-K · Current report

    Report date 2025-05-01 · 0001562088-25-000098 · Items 2.02,9.01

  28. DEF 14A · Proxy statement

    Report date 2024-12-31 · 0001562088-25-000086

  29. 10-K · Annual report

    Report date 2024-12-31 · 0001562088-25-000042

  30. 8-K · Current report

    Report date 2025-02-27 · 0001562088-25-000039 · Items 2.02,9.01

  31. 10-Q/A · Quarterly report

    Report date 2024-09-30 · 0001562088-24-000289

  32. 8-K · Current report

    Report date 2024-12-05 · 0001562088-24-000276 · Items 5.02,7.01,9.01

  33. SC 13G · Ownership disclosure

    0000315066-24-002701

  34. SC 13G/A · Ownership disclosure

    0002012383-24-003595

  35. 10-Q · Quarterly report

    Report date 2024-09-30 · 0001562088-24-000250

  36. 8-K · Current report

    Report date 2024-11-06 · 0001562088-24-000248 · Items 2.02,9.01

  37. SC 13G/A · Ownership disclosure

    0002012383-24-000959

  38. 10-Q · Quarterly report

    Report date 2024-06-30 · 0001562088-24-000207

  39. 8-K · Current report

    Report date 2024-08-07 · 0001562088-24-000203 · Items 2.02,9.01

  40. 8-K · Current report

    Report date 2024-06-14 · 0001562088-24-000172 · Items 5.02

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-23 · 2026 Q3: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 22 transaction rows22SGrant / award: 6 transaction rows6AExercise / conversion: 6 transaction rows6MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

52 matching transaction rows. Showing 51 to 52.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-07-10
2026-07-14
Schlosser MarioA · Grant / award
Acquired
Class A Common Stock140.0124.76
2026-07-10
2026-07-14
Lilly III John OsborneA · Grant / award
Acquired
Class A Common Stock118.0124.76

Identity & relationships

Wikidata structured data · retrieved 2026-10-23 · 1658 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0001562088Duolingo, Inc.

No parent relationship is available in this import; this is not proof of independence.

No verified LEI join available.

GLEIF legal entity reference data · retrieved 2026-10-23 · 1197 checked identities; 0 unavailable records

Search names and former names

    Revenue in constant purchasing power

    USD revenue expressed in 2026-09 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

    Year endedReported USD revenueCPI-adjusted USD revenue
    2024-12-31$748.02M$803.45M
    2023-12-31$531.11M$587.26M
    2022-12-31$369.50M$425.34M
    2021-12-31$250.77M$311.77M
    2020-12-31$161.70M$210.51M

    Bureau of Labor Statistics · retrieved 2026-10-23 · 9 selected series; gaps remain missing

    Explore the CPI history ↗