QUEST DIAGNOSTICS INC

Ticker: DGX CUSIP: 74834L100 Class: COMMON STOCK

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

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

Q3 2017

Shares 3,453 Value ($000) $323 Avg Close $89.87 Range $77.62 - $95.26

Q2 2017

Shares 4,150 Value ($000) $461 Avg Close $89.16 Range $81.72 - $94.33

Q1 2017

Shares 3,770 Value ($000) $370 Avg Close $80.00 Range $75.65 - $83.94

Q4 2016

Shares 3,638 Value ($000) $334 Avg Close $71.99 Range $66.09 - $78.16

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	3,453	$323	$89.87	$77.62 - $95.26
Q2 2017	4,150	$461	$89.16	$81.72 - $94.33
Q1 2017	3,770	$370	$80.00	$75.65 - $83.94
Q4 2016	3,638	$334	$71.99	$66.09 - $78.16