DRESSER-RAND GROUP INC

CUSIP: 261608103 Class: COM

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

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

Q1 2015
Shares 9,692 Value ($000) $779 Avg Close — Range —
Q4 2014
Shares 22,445 Value ($000) $1,836 Avg Close — Range —
Q3 2014
Shares 3,031 Value ($000) $249 Avg Close — Range —
Q2 2014
Shares 837 Value ($000) $53 Avg Close — Range —
Q1 2014
Shares 737 Value ($000) $43 Avg Close — Range —
Q4 2013
Shares 15,366 Value ($000) $916 Avg Close — Range —
Q3 2013
Shares 6,457 Value ($000) $403 Avg Close — Range —
Q2 2013
Shares 486 Value ($000) $29 Avg Close — Range —