ALEXZA PHARMACEUTICALS INC

CUSIP: 15384209 Class: COM NEW

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

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

Q4 2014
Shares 20,875 Value ($000) $31 Avg Close — Range —
Q3 2014
Shares 24,384 Value ($000) $57 Avg Close — Range —
Q2 2014
Shares 11,350 Value ($000) $52 Avg Close — Range —
Q1 2014
Shares 58,161 Value ($000) $258 Avg Close — Range —
Q4 2013
Shares 91,193 Value ($000) $431 Avg Close — Range —
Q3 2013
Shares 55,452 Value ($000) $284 Avg Close — Range —