BERKSHIRE HATHAWAY INC (BRK-B)

NYSE · Fire, Marine & Casualty Insurance · Inc. DE

What they're doing

Between 2026-08-02 and 2026-10-31, public records show 43 signals for BERKSHIRE HATHAWAY INC. Most notable: 2026-09-18: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $93.1M of stock; 2026-10-02: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $67.5M of stock; 2026-09-30: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $52.1M of stock. Federal contract obligations over the last 24 months total $80,991,654. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.

Generated 2026-10-31 from public records.

Signals, last 12 months

  1. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $69.0M of stock
  2. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $67.5M of stock
  3. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $35.1M of stock
  4. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $27.1M of stock
  5. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $3.6M of stock
  6. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $1.7M of stock
  7. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $404k of stock
  8. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $191k of stock
  9. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $177k of stock
  10. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $33.9M of stock
  11. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $15.2M of stock
  12. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $7.5M of stock
  13. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $298k of stock
  14. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $76k of stock
  15. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $52.1M of stock
  16. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $321k of stock
  17. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $1.0M of stock
  18. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $426k of stock
  19. Large insider sale
    Jain Ajit (director) sold $20.0M of stock
  20. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $25.4M of stock
  21. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $14.0M of stock
  22. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $558k of stock
  23. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $32.2M of stock
  24. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $19.7M of stock
  25. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $748k of stock
  26. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $238k of stock
  27. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $43.5M of stock
  28. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $101k of stock
  29. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $37.7M of stock
  30. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $12.4M of stock
  31. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $1.4M of stock
  32. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $370k of stock
  33. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $93.1M of stock
  34. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $5.4M of stock
  35. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $4.0M of stock
  36. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $2.5M of stock
  37. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $623k of stock
  38. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $55k of stock
  39. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $32.6M of stock
  40. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $21.0M of stock
  41. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $689k of stock
  42. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $647k of stock
  43. Insider purchase
    O'Sullivan Michael J. (officer) bought $205k of stock
  44. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $36.5M of stock
  45. Material 8-K filing
    Filed 8-K disclosing director or officer change
  46. Insider purchase
    O'Sullivan Michael J. (officer) bought $226k of stock
  47. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $182.9M of stock
  48. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $199.9M of stock
  49. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.5M of stock
  50. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.0M of stock
  51. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $2.5M of stock
  52. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.5M of stock
  53. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.5M of stock
  54. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.4M of stock
  55. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $3.6M of stock
  56. Material 8-K filing
    Filed 8-K disclosing director or officer change
  57. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.7M of stock
  58. Material 8-K filing
    Filed 8-K disclosing director or officer change

Insider transactions

DateInsiderRoleCodeSharesPriceValue
2026-10-27BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS382,563180.43$69,026,033
2026-10-21Jain AjitdirectorG19——
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP29979.74$23,842
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP5,13578.77$404,484
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP2,45277.93$191,084
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP2,29077.12$176,605
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP20,20081.9$1,654,380
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP44,30081.14$3,594,502
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP842,75380.04$67,453,950
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP342,55379.03$27,071,964
2026-10-02BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP448,11378.37$35,118,616
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP10080$8,000
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP95079.51$75,535
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP3,80278.26$297,545
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP186,99181.46$15,232,287
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP92,83080.57$7,479,313
2026-10-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP425,86979.49$33,852,327
2026-09-30BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP4,00879.98$320,560
2026-09-30BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP638,81381.59$52,120,753
2026-09-29BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP10080$8,000
2026-09-29BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP12,28981.95$1,007,084
2026-09-28BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP5,20081.96$426,192
2026-09-28Jain AjitdirectorS39,700503.09$19,972,776
2026-09-25BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP7,02279.53$558,460
2026-09-25BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP171,72381.6$14,012,597
2026-09-25BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP313,37980.9$25,352,361
2026-09-24BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP2,97579.91$237,732
2026-09-24BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP9,41579.42$747,739
2026-09-24BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP241,69281.44$19,683,396
2026-09-24BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP399,23880.58$32,170,598
2026-09-23BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP1,26379.99$101,027
2026-09-23BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP532,99381.65$43,518,878
2026-09-21BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP18,14676.62$1,390,347
2026-09-21BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP4,88875.76$370,315
2026-09-21BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP483,80977.97$37,722,588
2026-09-21BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP160,27577.23$12,378,038
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP50078.38$39,190
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP71076.98$54,656
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP39075.76$29,546
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP33,12274.8$2,477,526
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP7,90078.88$623,152
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP68,76078.09$5,369,468
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP51,58677.06$3,975,217
2026-09-18BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP1,218,42976.39$93,075,791
2026-09-17BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP8,30677.94$647,370
2026-09-17BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP8,95976.96$689,485
2026-09-17BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP410,16479.41$32,571,123
2026-09-17BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerP267,58578.41$20,981,340
2026-09-03Jain AjitdirectorG10——
2026-08-12O'Sullivan Michael J.officerP45510.64$22,979

Federal contracts

24-month federal obligations: $80,967,782

2024-11: $428,1302024-12: $3,830,5752025-01: $1,458,2202025-02: $-1,167,3082025-03: $5,278,3922025-04: $2,246,0912025-05: $10,507,9802025-06: $3,824,4462025-07: $5,399,5112025-08: $6,834,7622025-09: $2,256,8792025-10: $5,995,6632025-11: $1,075,9142025-12: $2,058,8532026-01: $3,221,1222026-02: $6,515,1332026-03: $2,527,0332026-04: $11,922,6142026-05: $82,1942026-06: $503,2592026-07: $17,0962026-08: $5,710,6052026-09: $296,1442026-10: $144,475
  • 2026-04-16 $8,619,705 · Department of Defense · 8512040950!COAT,MAN'S
  • 2025-07-21 $8,200,000 · Department of the Treasury · 1OZ SILVER BLANK (UPSET SILVER AMERICAN EAGLE PLANCHETS) MINT MAC PRECIOUS BLANKS
  • 2026-08-12 $5,740,000 · Department of the Treasury · 1OZ SILVER BLANK (UPSET SILVER AMERICAN EAGLE PLANCHETS)
  • 2025-05-13 $5,338,656 · Department of Defense · 8511378077!COAT,MAN'S
  • 2025-08-28 $5,338,656 · Department of Defense · 8511600296!COAT,MAN'S
  • 2026-02-12 $3,833,393 · Department of Defense · 8511913783!TROUSERS,MEN'S
  • 2025-05-07 $2,488,309 · Department of Defense · THIS IS A FIRM FIXED PRICE DELIVERY ORDER UNDER CONTRACT W31P4Q20D0046, FOR OPTIMAL TIME DOMAIN REFLECTORS, IN SUPPORT O
  • 2024-12-18 $2,447,903 · Department of Defense · 8511083459!COAT,MAN'S
  • 2025-06-06 $2,404,528 · Department of Defense · OPTICAL LOSS TEST K
  • 2025-10-31 $2,404,528 · Department of Defense · OPTICAL LOSS TEST K

Lobbying

No federal lobbying filings on record for this client mapping.

Public attention

7-day average 2,717 views/day vs 90-day median 2,302.

Recent filings

BERKSHIRE HATHAWAY INC (BRK-B): insider trades, federal contracts, lobbying | IP Files