A business in context

BRK-B research notebook

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

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-09-07 · 8010 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-09-03 · 0001728451-26-000003

  2. 4 · Ownership change

    Report date 2026-08-12 · 0001193125-26-349574

  3. 4 · Ownership change

    Report date 2026-08-12 · 0001193125-26-349555

  4. 8-K · Current report

    Report date 2026-08-08 · 0001193125-26-344495 · Items 2.02,9.01

  5. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001193125-26-341032

  6. 4 · Ownership change

    Report date 2026-07-31 · 0001193125-26-333151

  7. 4 · Ownership change

    Report date 2026-07-14 · 0001193125-26-304843

  8. 4 · Ownership change

    Report date 2026-07-01 · 0001728451-26-000002

  9. 4 · Ownership change

    Report date 2026-05-22 · 0001193125-26-239886

  10. 4 · Ownership change

    Report date 2026-05-18 · 0001193125-26-232543

  11. 8-K · Current report

    Report date 2026-05-02 · 0001193125-26-212148 · Items 2.02,5.02,5.03,5.07,9.01

  12. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001193125-26-202243

  13. 8-K · Current report

    Report date 2026-04-16 · 0001193125-26-159326 · Items 8.01,9.01

  14. DEF 14A · Proxy statement

    Report date 2026-05-02 · 0001193125-26-106253

  15. 8-K · Current report

    Report date 2026-03-04 · 0001193125-26-092557 · Items 8.01,9.01

  16. 8-K · Current report

    Report date 2026-02-28 · 0001193125-26-085801 · Items 2.02,9.01

  17. 10-K · Annual report

    Report date 2025-12-31 · 0001193125-26-083899

  18. 8-K/A · Current report

    Report date 2025-05-03 · 0001193125-26-004727 · Items 5.02

  19. 8-K · Current report

    Report date 2025-12-08 · 0001193125-25-314935 · Items 5.02,9.01

  20. 8-K · Current report

    Report date 2025-11-20 · 0001193125-25-290864 · Items 8.01,9.01

  21. 8-K · Current report

    Report date 2025-11-01 · 0001193125-25-262260 · Items 2.02,9.01

  22. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001193125-25-261548

  23. 8-K · Current report

    Report date 2025-09-30 · 0001193125-25-229405 · Items 5.03,9.01

  24. 8-K · Current report

    Report date 2025-08-02 · 0001193125-25-172579 · Items 2.02,9.01

  25. 10-Q · Quarterly report

    Report date 2025-06-30 · 0000950170-25-101578

  26. 8-K · Current report

    Report date 2025-05-03 · 0001193125-25-115695 · Items 5.02,9.01

  27. 8-K · Current report

    Report date 2025-05-03 · 0001193125-25-113900 · Items 2.02,5.07,9.01

  28. 10-Q · Quarterly report

    Report date 2025-03-31 · 0000950170-25-063112

  29. 8-K · Current report

    Report date 2025-04-17 · 0001193125-25-084458 · Items 8.01,9.01

  30. DEF 14A · Proxy statement

    Report date 2025-05-03 · 0001193125-25-054877

  31. 8-K · Current report

    Report date 2025-02-22 · 0001193125-25-033393 · Items 2.02,9.01

  32. 10-K · Annual report

    Report date 2024-12-31 · 0000950170-25-025210

  33. SC 13D/A · Ownership disclosure

    0001193125-24-265100

  34. SC 13G · Ownership disclosure

    0001193125-24-258561

  35. SC 13G/A · Ownership disclosure

    0001193125-24-258557

  36. SC 13G/A · Ownership disclosure

    0001193125-24-258555

  37. 8-K · Current report

    Report date 2024-11-02 · 0001193125-24-250195 · Items 2.02,9.01

  38. 10-Q · Quarterly report

    Report date 2024-09-30 · 0000950170-24-120241

  39. 8-K · Current report

    Report date 2024-10-23 · 0001193125-24-241941 · Items 8.01,9.01

  40. SC 13G/A · Ownership disclosure

    0001193125-24-226917

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-09-07 · 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: 2 transaction rows2PSale: 0 transaction rows0SGrant / award: 0 transaction rows0AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 4 transaction rows4G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

8 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-05-22
2026-05-26
BUFFETT WARREN EG · Gift
Disposed
Class B Common Stock160.00.0
2026-05-18
2026-05-20
BUFFETT WARREN EG · Gift
Disposed
Class B Common Stock18646.00.0
2026-05-18
2026-05-20
BUFFETT WARREN EC · Conversion
Acquired
Class B Common Stock37500.00.0
2026-05-18
2026-05-20
BUFFETT WARREN EG · Gift
Disposed
Class B Common Stock18646.00.0
2026-05-18
2026-05-20
BUFFETT WARREN EC · Conversion
Disposed
Class A Common Stock
Derivative security
25.0
2026-05-14
2026-05-18
GUYMAN CHARLOTTEG · Gift
Disposed
Class B Common Stock574.00.0
2026-05-06
2026-05-06
O'Sullivan Michael J.P · Purchase
Acquired
Class B Common Stock483.0467.13
2026-05-06
2026-05-06
O'Sullivan Michael J.P · Purchase
Acquired
Class B Common Stock53.0470.22

Identity & relationships

Wikidata structured data · retrieved 2026-09-07 · 1611 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 · 0001067983BERKSHIRE HATHAWAY INC
GEICONetJetsBerkshire Hathaway EnergyMarmon GroupGeneral Re CorporationAcme BrickBurlington Northern Santa Fe CorporationThe Buffalo NewsPilot Flying JFlightSafety InternationalDairy QueenBrooks SportsScott Fetzer Company

Showing 13 of 13 imported Wikidata subsidiary claims. Additional aliases appear below.

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

Legal Entity Identifier
5493000C01ZX7D35SD85
GLEIF legal name
BERKSHIRE HATHAWAY INC.
Entity / LEI registration status
ACTIVE / ISSUED
Reference data updated
2026-08-21T06:20:32Z

direct-parent: no parent LEI supplied

ultimate-parent: no parent LEI supplied

GLEIF legal entity reference data · retrieved 2026-09-07 · 1177 checked identities; 0 unavailable records

Search names and former names

View Wikidata identity and references ↗

  • Berkshire Hathaway · alias · wikidata
  • Valley Falls Company · alias · wikidata
  • Berkshire Hathaway Incorperation · alias · wikidata
  • GEICO · subsidiary · wikidata
  • Government Employees Insurance Company · subsidiary · wikidata
  • NetJets · subsidiary · wikidata
  • Executive Jet Aviation · subsidiary · wikidata
  • Netjets Aviation · subsidiary · wikidata
  • Berkshire Hathaway Energy · subsidiary · wikidata
  • MidAmerican Energy Holdings Company · subsidiary · wikidata
  • Marmon Group · subsidiary · wikidata
  • General Re Corporation · subsidiary · wikidata
  • Acme Brick · subsidiary · wikidata
  • Burlington Northern Santa Fe Corporation · subsidiary · wikidata
  • Burlington Northern Santa Fe, LLC · subsidiary · wikidata
  • The Buffalo News · subsidiary · wikidata
  • Pilot Flying J · subsidiary · wikidata
  • Pilot Travel Centers LLC · subsidiary · wikidata
  • Pilot Travel Centers · subsidiary · wikidata
  • PFJ · subsidiary · wikidata
  • FlightSafety International · subsidiary · wikidata
  • Dairy Queen · subsidiary · wikidata
  • DQ · subsidiary · wikidata
  • Brooks Sports · subsidiary · wikidata
  • Scott Fetzer Company · subsidiary · wikidata
  • Scott & Fetzer · subsidiary · wikidata
  • NBH INC · former SEC name · 1998-08-10 to 1999-01-05
Explore headquarters map ↗

Revenue in constant purchasing power

USD revenue expressed in 2026-07 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$371.43B$395.38B
2023-12-31$364.48B$399.41B
2022-12-31$302.02B$344.55B
2021-12-31$276.19B$340.29B
2020-12-31$245.58B$316.84B
2019-12-31$254.62B$332.54B
2018-12-31$247.84B$329.56B
2017-12-31$239.93B$326.84B

Bureau of Labor Statistics · retrieved 2026-09-07 · 9 selected series; gaps remain missing

Explore the CPI history ↗