QUANTUM CORP

CUSIP: 747906204 Class: CMN

Aperio Group, LLC's Holding History (CIK: 0001364615)

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

Q2 2015
Shares 51,299 Value ($000) $86 Avg Close — Range —
Q1 2015
Shares 47,754 Value ($000) $76 Avg Close — Range —
Q4 2014
Shares 18,625 Value ($000) $33 Avg Close — Range —