Form 4 Tracker
Michael J. O'Sullivan

Senior Vice President, General Counsel and Secretary · 2 filings · Latest: Aug 12, 2026

BERKSHIRE HATHAWAY INC
TickerOwnerRelationshipDateTransactionCost#SharesValue ($)#Shares TotalSEC Filing
BRK.B
Michael J. O'SullivanSenior Vice President, General Counsel and SecretaryAug 12, 2026
Purchase
$512.44488$250.1K1,151
BRK.B
Michael J. O'SullivanSenior Vice President, General Counsel and SecretaryMay 6, 2026
Purchase
$467.44536$250.5K663
SNAP
Michael J. O'SullivanJan 30, 2026
Proposed Sale
$6.9324,000$166.3K
SNAP
Michael J. O'SullivanDec 31, 2025
Proposed Sale
$8.0724,000$193.7K
SNAP
O'Sullivan Michael J.Dec 16, 2025
Proposed Sale
$7.2114,572$105.1K
SNAP
Michael J. O'SullivanNov 28, 2025
Proposed Sale
$7.6124,000$182.6K
SNAP
O'Sullivan Michael J.Nov 17, 2025
Proposed Sale
$8.3470,882$591.0K
SNAP
Michael J. O'SullivanOct 31, 2025
Proposed Sale
$7.8024,000$187.2K
SNAP
Michael J. O'SullivanSep 30, 2025
Proposed Sale
$7.7124,000$185.0K
SNAP
O'Sullivan Michael J.Sep 16, 2025
Proposed Sale
$7.5614,290$108.0K
SNAP
Michael J. O'SullivanAug 29, 2025
Proposed Sale
$7.1424,000$171.4K
SNAP
O'Sullivan Michael J.Aug 18, 2025
Proposed Sale
$7.1868,705$493.1K
SNAP
Michael O'SullivanJun 30, 2025
Proposed Sale
$8.6924,000$208.6K
SNAP
O'Sullivan Michael J.Jun 16, 2025
Proposed Sale
$8.0414,297$115.0K
SNAP
Michael O'SullivanMay 30, 2025
Proposed Sale
$8.2524,000$198.0K
SNAP
O'Sullivan Michael J.May 16, 2025
Proposed Sale
$8.5968,845$591.7K
SNAP
Michael O'SullivanApr 30, 2025
Proposed Sale
$9.0924,000$218.2K
SNAP
Michael O'SullivanMar 31, 2025
Proposed Sale
$8.7124,000$209.0K
SNAP
O'Sullivan Michael J.Mar 17, 2025
Proposed Sale
$8.8314,183$125.2K
SNAP
Michael O'SullivanFeb 28, 2025
Proposed Sale
$10.2524,000$246.0K

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