ADVANCED EMISSIONS SOLUTS IN

Ticker: ARQ CUSIP: 00770C101 Class: COM

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

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

Q1 2014

Shares 26,346 Value ($000) $647 Avg Close $19.55 Range $16.66 - $21.56

Q4 2013

Shares 125,607 Value ($000) $6,812 Avg Close $17.66 Range $13.54 - $22.08

Q3 2013

Shares 30,352 Value ($000) $1,297 Avg Close $15.59 Range $12.31 - $16.89

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	26,346	$647	$19.55	$16.66 - $21.56
Q4 2013	125,607	$6,812	$17.66	$13.54 - $22.08
Q3 2013	30,352	$1,297	$15.59	$12.31 - $16.89