BERKSHIRE HATHAWAY INC DEL

Ticker: BRK/B CUSIP: 084670702 Class: Common Stock

RTW INVESTMENTS, LP's Holding History (CIK: 0001493215)

Note: Option positions (PUT/CALL) are excluded.

Q1 2016

Shares 50 Value ($000) $7 Avg Close $132.58 Range $123.55 - $143.40

Q4 2015

Shares 50 Value ($000) $7 Avg Close $134.20 Range $127.46 - $138.62

Q2 2015

Shares 50 Value ($000) $7 Avg Close $142.63 Range $136.08 - $148.57

Q1 2015

Shares 50 Value ($000) $7 Avg Close $147.14 Range $142.50 - $151.69

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2016	50	$7	$132.58	$123.55 - $143.40
Q4 2015	50	$7	$134.20	$127.46 - $138.62
Q2 2015	50	$7	$142.63	$136.08 - $148.57
Q1 2015	50	$7	$147.14	$142.50 - $151.69