Michael J O'sullivan

Insider at BRK.B

Data refreshed: Aug 27, 2026, 11:42 PM UTC

Total filings

Buys

$250K

Sells

Grants & other

Recent filings

Filed	Symbol	Type	Qty	Value
Aug 13, 2026	BRK.B Berkshire Hathaway Inc	BUY	45	$23K
Aug 13, 2026	BRK.B Berkshire Hathaway Inc	BUY	400	$205K
Aug 13, 2026	BRK.B Berkshire Hathaway Inc	BUY	43	$22K

Berkshire Hathaway Inc

Aug 13, 202645 sh · $23K

Berkshire Hathaway Inc

Aug 13, 2026400 sh · $205K

Berkshire Hathaway Inc

Aug 13, 202643 sh · $22K