MCGRAW HILL FINL INC

CUSIP: 580645109 Class: COM

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

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

Q2 2014
Shares 2,215 Value ($000) $184 Avg Close — Range —
Q1 2014
Shares 3,631 Value ($000) $277 Avg Close — Range —
Q4 2013
Shares 11,198 Value ($000) $876 Avg Close — Range —
Q3 2013
Shares 16,307 Value ($000) $1,070 Avg Close — Range —