BERKSHIRE HATHAWAY INC DEL

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

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q1 2015

Shares 7,323 Value ($000) $1,044 Avg Close $147.14 Range $142.50 - $151.69

Q4 2014

Shares 7,323 Value ($000) $1,100 Avg Close $144.37 Range $132.03 - $152.94

Q3 2014

Shares 8,066 Value ($000) $1,114 Avg Close $133.21 Range $122.72 - $142.45

Q2 2014

Shares 11,551 Value ($000) $1,462 Avg Close $126.57 Range $121.09 - $129.73

Q1 2014

Shares 12,642 Value ($000) $1,580 Avg Close $116.85 Range $108.12 - $125.91

Q4 2013

Shares 14,689 Value ($000) $1,742 Avg Close $115.63 Range $110.84 - $118.66

Q3 2013

Shares 13,060 Value ($000) $1,482 Avg Close $115.36 Range $110.72 - $119.30

Q2 2013

Shares 11,933 Value ($000) $1,336 Avg Close $110.02 Range $102.69 - $115.98

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	7,323	$1,044	$147.14	$142.50 - $151.69
Q4 2014	7,323	$1,100	$144.37	$132.03 - $152.94
Q3 2014	8,066	$1,114	$133.21	$122.72 - $142.45
Q2 2014	11,551	$1,462	$126.57	$121.09 - $129.73
Q1 2014	12,642	$1,580	$116.85	$108.12 - $125.91
Q4 2013	14,689	$1,742	$115.63	$110.84 - $118.66
Q3 2013	13,060	$1,482	$115.36	$110.72 - $119.30
Q2 2013	11,933	$1,336	$110.02	$102.69 - $115.98