MAKO SURGICAL CORP

CUSIP: 560879108 Class: CMN

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

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

Q3 2013
Shares 17,745 Value ($000) $524 Avg Close — Range —
Q2 2013
Shares 26,736 Value ($000) $322 Avg Close — Range —