ARTHROCARE CORP

CUSIP: 43136100 Class: COM

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

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

Q1 2014
Shares 4,971 Value ($000) $240 Avg Close — Range —
Q4 2013
Shares 6,187 Value ($000) $249 Avg Close — Range —
Q3 2013
Shares 987 Value ($000) $35 Avg Close — Range —