A business in context

KRSA research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-09-25 · 8004 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 8-K · Current report

    Report date 2026-09-08 · 0001193125-26-389318 · Items 1.01,2.01,2.02,3.02,3.03,5.01,5.02,5.03,5.05,5.06,7.01,9.01

  2. 4 · Ownership change

    Report date 2026-09-09 · 0001193125-26-388146

  3. 4 · Ownership change

    Report date 2026-09-09 · 0001193125-26-388144

  4. 4 · Ownership change

    Report date 2026-09-09 · 0001193125-26-388142

  5. 4 · Ownership change

    Report date 2026-09-09 · 0001193125-26-388136

  6. 8-K · Current report

    Report date 2026-08-26 · 0001193125-26-369426 · Items 5.07,8.01,9.01

  7. 8-K · Current report

    Report date 2026-08-25 · 0001193125-26-365150 · Items 8.01

  8. 4 · Ownership change

    Report date 2026-08-14 · 0001193125-26-355721

  9. 4 · Ownership change

    Report date 2026-08-14 · 0001193125-26-355707

  10. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001193125-26-332842

  11. 4 · Ownership change

    Report date 2026-07-16 · 0001193125-26-309048

  12. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001193125-26-219478

  13. 10-K/A · Annual report

    Report date 2025-12-31 · 0001193125-26-194204

  14. 8-K · Current report

    Report date 2026-04-01 · 0001193125-26-137909 · Items 1.01,5.01,5.02,7.01,9.01

  15. 10-K · Annual report

    Report date 2025-12-31 · 0001193125-26-132193

  16. 8-K · Current report

    Report date 2026-02-17 · 0001193125-26-053035 · Items 7.01,9.01

  17. 8-K · Current report

    Report date 2026-01-03 · 0001193125-26-003509 · Items 1.01,7.01,9.01

  18. 8-K · Current report

    Report date 2025-12-01 · 0001193125-25-304067 · Items 8.01

  19. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001193125-25-277749

  20. 10-K/A · Annual report

    Report date 2024-12-31 · 0001193125-25-277621

  21. 8-K · Current report

    Report date 2025-09-19 · 0001193125-25-213332 · Items 1.01,7.01,9.01

  22. 4 · Ownership change

    Report date 2025-08-07 · 0000950170-25-106532

  23. 10-Q · Quarterly report

    Report date 2025-06-30 · 0000950170-25-103123

  24. 8-K · Current report

    Report date 2025-06-16 · 0001193125-25-142765 · Items 5.07,9.01

  25. 8-K · Current report

    Report date 2025-05-07 · 0001193125-25-115089 · Items 1.01,9.01

  26. 10-Q · Quarterly report

    Report date 2025-03-31 · 0000950170-25-064493

  27. DEF 14A · Proxy statement

    Report date 2025-06-16 · 0001140361-25-016370

  28. 8-K · Current report

    Report date 2025-03-21 · 0001193125-25-062612 · Items 1.01,3.02,9.01

  29. 10-K · Annual report

    Report date 2024-12-31 · 0000950170-25-032037

  30. 8-K · Current report

    Report date 2024-12-13 · 0001193125-24-280125 · Items 1.01,7.01,9.01

  31. 10-Q · Quarterly report

    Report date 2024-09-30 · 0000950170-24-127116

  32. 8-K · Current report

    Report date 2024-08-07 · 0001193125-24-195410 · Items 7.01,9.01

  33. 10-Q · Quarterly report

    Report date 2024-06-30 · 0000950170-24-092257

  34. SC 13G/A · Ownership disclosure

    0001193125-24-178653

  35. 8-K · Current report

    Report date 2024-06-14 · 0001193125-24-161591 · Items 5.07,9.01

  36. 10-Q · Quarterly report

    Report date 2024-03-31 · 0000950170-24-054602

  37. DEF 14A · Proxy statement

    Report date 2024-06-14 · 0001140361-24-022981

  38. 8-K · Current report

    Report date 2024-04-18 · 0001193125-24-100763 · Items 8.01,9.01

  39. 10-K · Annual report

    Report date 2023-12-31 · 0000950170-24-025935

  40. SC 13G/A · Ownership disclosure

    0001493152-24-006650

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-09-22 · 2026 Q2: 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: 0 transaction rows0SGrant / award: 0 transaction rows0AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

0 matching transaction rows.

No matching transaction rows in the covered quarter. This does not establish that no insider transactions occurred.

Identity & relationships

Wikidata structured data · retrieved 2026-09-22 · 1612 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 · 0001755237Korsana Biosciences, 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 2026-09-22 · 1177 checked identities; 0 unavailable records

Search names and former names
  • Cyclerion Therapeutics, Inc. · former SEC name · 2018-10-09 to 2026-08-27

Revenue in constant purchasing power

USD revenue expressed in 2026-08 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$2.00M$2.14M
2023-12-31$0$0
2022-12-31$297.0K$339.9K
2021-12-31$3.94M$4.87M
2020-12-31$2.30M$2.97M
2019-12-31$4.51M$5.91M

Bureau of Labor Statistics · retrieved 2026-09-25 · 9 selected series; gaps remain missing

Explore the CPI history ↗