QUANTUM CORP

CUSIP: 747906204 Class: CMN

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

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

Q1 2015
Shares 26,114 Value ($000) $42 Avg Close — Range —
Q4 2014
Shares 72,000 Value ($000) $127 Avg Close — Range —