BIO RAD LABS INC

Ticker: BIO CUSIP: 090572207 Class: COM

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q3 2018

Shares 16,980 Value ($000) $5,315 Avg Close $310.39 Range $285.83 - $345.15

Q2 2018

Shares 18,490 Value ($000) $5,335 Avg Close $276.12 Range $240.01 - $304.36

Q1 2018

Shares 20,055 Value ($000) $5,015 Avg Close $254.62 Range $231.00 - $279.59

Q4 2017

Shares 19,280 Value ($000) $4,602 Avg Close $242.32 Range $214.44 - $273.87

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	16,980	$5,315	$310.39	$285.83 - $345.15
Q2 2018	18,490	$5,335	$276.12	$240.01 - $304.36
Q1 2018	20,055	$5,015	$254.62	$231.00 - $279.59
Q4 2017	19,280	$4,602	$242.32	$214.44 - $273.87