BRK.B filings
Corporate insider profile
Michael J. O'Sullivan Filing Activity
Latest reported as See Remarks of BERKSHIRE HATHAWAY INC (BRK.B).
- Purchase filings
- 1
- Reported companies
- 1
- Net open-market value
- $250,545
- Latest transaction
- May 6, 2026
Affiliated corporations
Reported company relationships
Transaction history
