QUANTUM CORP

CUSIP: 747906204 Class: CMN

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2017
Shares 342 Value ($000) $0 Avg Close — Range —
Q4 2016
Shares 400 Value ($000) $0 Avg Close — Range —
Q1 2016
Shares 152,505 Value ($000) $93 Avg Close — Range —
Q4 2015
Shares 44,105 Value ($000) $41 Avg Close — Range —
Q3 2015
Shares 16,705 Value ($000) $12 Avg Close — Range —
Q2 2015
Shares 1,800 Value ($000) $3 Avg Close — Range —
Q1 2014
Shares 1,100 Value ($000) $1 Avg Close — Range —
Q4 2013
Shares 1,100 Value ($000) $1 Avg Close — Range —
Q3 2013
Shares 1,100 Value ($000) $2 Avg Close — Range —
Q2 2013
Shares 400 Value ($000) $1 Avg Close — Range —