DOLBY LABORATORIES INC

Ticker: DLB CUSIP: 25659T107 Class: Common Stock

CHICAGO TRUST Co NA's Holding History (CIK: 0001601539)

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

Q4 2023

Shares 2,475 Value ($000) $213 Avg Close $80.91 Range $75.02 - $86.60

Q4 2021

Shares 2,400 Value ($000) $228 Avg Close $83.62 Range $77.77 - $90.31

Q3 2021

Shares 3,000 Value ($000) $264 Avg Close $90.36 Range $81.92 - $97.28

Q2 2021

Shares 3,000 Value ($000) $295 Avg Close $91.87 Range $85.53 - $97.29

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2023	2,475	$213	$80.91	$75.02 - $86.60
Q4 2021	2,400	$228	$83.62	$77.77 - $90.31
Q3 2021	3,000	$264	$90.36	$81.92 - $97.28
Q2 2021	3,000	$295	$91.87	$85.53 - $97.29