DELL INC

CUSIP: 24702R101 Class: CS

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

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

Q3 2013
Shares 353,892 Value ($000) $4,873 Avg Close — Range —
Q2 2013
Shares 859,253 Value ($000) $11,471 Avg Close — Range —