SIZMEK INC

CUSIP: 83013P105 Class: COM

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

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

Q4 2015
Shares 1,038 Value ($000) $4 Avg Close — Range —
Q3 2015
Shares 468 Value ($000) $3 Avg Close — Range —
Q4 2014
Shares 11,168 Value ($000) $70 Avg Close — Range —
Q2 2014
Shares 8,835 Value ($000) $84 Avg Close — Range —
Q1 2014
Shares 10,587 Value ($000) $113 Avg Close — Range —