ADVANCED EMISSIONS SOLUTIONS I

CUSIP: 00770c101 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q1 2014
Shares 10,200 Value ($000) $250 Avg Close — Range —
Q4 2013
Shares 5,100 Value ($000) $277 Avg Close — Range —
Q3 2013
Shares 5,100 Value ($000) $218 Avg Close — Range —
Q2 2013
Shares 23,300 Value ($000) $981 Avg Close — Range —