BERKSHIRE HATHAWAY INC (BRK-B)

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

What they're doing

Between 2026-06-25 and 2026-09-23, public records show 16 signals for BERKSHIRE HATHAWAY INC. Most notable: 2026-09-18: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $93.1M of stock; 2026-09-21: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $37.7M of stock; 2026-09-17: BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $32.6M of stock. Federal contract obligations over the last 24 months total $81,603,464. This summary was assembled automatically from SEC EDGAR, USAspending.gov, U.S. Senate lobbying disclosures and Wikimedia pageview counts.

Generated 2026-09-23 from public records.

Signals, last 12 months

  1. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $37.7M of stock
  2. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $12.4M of stock
  3. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $1.4M of stock
  4. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $370k of stock
  5. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $93.1M of stock
  6. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $5.4M of stock
  7. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $4.0M of stock
  8. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $2.5M of stock
  9. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $623k of stock
  10. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $55k of stock
  11. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $32.6M of stock
  12. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $21.0M of stock
  13. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $647k of stock
  14. Insider purchase
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) bought $689k of stock
  15. Insider purchase
    O'Sullivan Michael J. (officer) bought $205k of stock
  16. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $36.5M of stock
  17. Material 8-K filing
    Filed 8-K disclosing director or officer change
  18. Insider purchase
    O'Sullivan Michael J. (officer) bought $226k of stock
  19. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $182.9M of stock
  20. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $199.9M of stock
  21. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.5M of stock
  22. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.0M of stock
  23. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $2.5M of stock
  24. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.5M of stock
  25. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.5M of stock
  26. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $5.4M of stock
  27. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $3.6M of stock
  28. Material 8-K filing
    Filed 8-K disclosing director or officer change
  29. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $1.7M of stock
  30. Material 8-K filing
    Filed 8-K disclosing director or officer change
  31. Large insider sale
    BERKSHIRE HATHAWAY INC; BUFFETT WARREN E (ten_percent_owner) sold $54.3M of stock

Insider transactions

DateInsiderRoleCodeSharesPriceValue
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
2026-08-12O'Sullivan Michael J.officerP400512.52$205,008
2026-08-12O'Sullivan Michael J.officerP43513.61$22,085
2026-07-31BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS182,980199.55$36,513,293
2026-07-14BUFFETT WARREN EdirectorC12,000,0000$0
2026-07-14BUFFETT WARREN EdirectorG9,000,0000$0
2026-07-14BUFFETT WARREN EdirectorG1,000,0000$0
2026-07-14BUFFETT WARREN EdirectorG1,000,0000$0
2026-07-14BUFFETT WARREN EdirectorG1,000,0000$0
2026-07-01Jain AjitdirectorG3——
2026-05-22BUFFETT WARREN EdirectorG1600$0
2026-05-22BUFFETT WARREN EdirectorG1600$0
2026-05-18BUFFETT WARREN EdirectorG18,6460$0
2026-05-18BUFFETT WARREN EdirectorC37,5000$0
2026-05-18BUFFETT WARREN EdirectorG18,6460$0
2026-05-18BUFFETT WARREN EdirectorC37,5000$0
2026-05-18BUFFETT WARREN EdirectorG18,6460$0
2026-05-18BUFFETT WARREN EdirectorG18,6460$0
2026-05-14GUYMAN CHARLOTTEdirectorG5740$0
2026-05-14GUYMAN CHARLOTTEdirectorG5740$0
2026-05-06O'Sullivan Michael J.officerP483467.13$225,624
2026-05-06O'Sullivan Michael J.officerP53470.22$24,922
2026-05-06O'Sullivan Michael J.officerP483467.13$225,624
2026-05-06O'Sullivan Michael J.officerP53470.22$24,922
2026-05-01BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS1,220,376149.84$182,864,679
2026-03-27Jain AjitdirectorG22——
2026-03-27Jain AjitdirectorG22——
2026-01-29BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS1,658,480120.56$199,939,881
2026-01-16BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS7,68583.72$643,404
2026-01-15BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS18,12584.04$1,523,201
2026-01-14BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS59,41183.79$4,978,101
2026-01-13BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS30,64382.78$2,536,502
2026-01-12BERKSHIRE HATHAWAY INC; BUFFETT WARREN Eten percent ownerS66,56883.27$5,543,424

Federal contracts

24-month federal obligations: $81,603,464

2024-09: $437,0092024-10: $439,1372024-11: $434,5252024-12: $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: $193,760
  • 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 5,560 views/day vs 90-day median 2,364.

Recent filings