HORIZON PHARMA INC

CUSIP: 44047T109 Class: COM

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

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

Q3 2014
Shares 31,469 Value ($000) $386 Avg Close — Range —
Q4 2013
Shares 927 Value ($000) $7 Avg Close — Range —
Q3 2013
Shares 7,034 Value ($000) $24 Avg Close — Range —
Q2 2013
Shares 37,344 Value ($000) $92 Avg Close — Range —