MATTSON TECHNOLOGY INC

CUSIP: 577223100 Class: CMN

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

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

Q1 2016
Shares 11,500 Value ($000) $42 Avg Close — Range —
Q4 2015
Shares 19,900 Value ($000) $70 Avg Close — Range —
Q3 2015
Shares 3,900 Value ($000) $9 Avg Close — Range —
Q2 2015
Shares 3,800 Value ($000) $13 Avg Close — Range —
Q1 2015
Shares 4,300 Value ($000) $17 Avg Close — Range —
Q3 2014
Shares 6,400 Value ($000) $16 Avg Close — Range —
Q2 2014
Shares 6,600 Value ($000) $14 Avg Close — Range —
Q1 2014
Shares 6,400 Value ($000) $15 Avg Close — Range —