DOLBY LABORATORIES INC

Ticker: DLB CUSIP: 25659T107 Class: Common Stock

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

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

Q4 2018

Shares 11,370 Value ($000) $703 Avg Close $60.76 Range $52.57 - $64.86

Q3 2018

Shares 22,620 Value ($000) $1,583 Avg Close $60.37 Range $54.64 - $64.93

Q2 2018

Shares 93,245 Value ($000) $5,752 Avg Close $57.13 Range $52.96 - $62.04

Q1 2018

Shares 100,870 Value ($000) $6,411 Avg Close $57.61 Range $52.34 - $66.45

Q4 2017

Shares 76,180 Value ($000) $4,723 Avg Close $53.98 Range $50.40 - $56.65

Q3 2017

Shares 64,390 Value ($000) $3,704 Avg Close $46.70 Range $42.82 - $53.33

Q3 2016

Shares 195,515 Value ($000) $10,615 Avg Close $44.12 Range $39.59 - $48.22

Q2 2016

Shares 193,745 Value ($000) $9,271 Avg Close $40.14 Range $36.94 - $43.63

Q1 2016

Shares 158,240 Value ($000) $6,877 Avg Close $32.54 Range $26.57 - $38.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	11,370	$703	$60.76	$52.57 - $64.86
Q3 2018	22,620	$1,583	$60.37	$54.64 - $64.93
Q2 2018	93,245	$5,752	$57.13	$52.96 - $62.04
Q1 2018	100,870	$6,411	$57.61	$52.34 - $66.45
Q4 2017	76,180	$4,723	$53.98	$50.40 - $56.65
Q3 2017	64,390	$3,704	$46.70	$42.82 - $53.33
Q3 2016	195,515	$10,615	$44.12	$39.59 - $48.22
Q2 2016	193,745	$9,271	$40.14	$36.94 - $43.63
Q1 2016	158,240	$6,877	$32.54	$26.57 - $38.48