BSD MED CORP DEL

CUSIP: 55662100 Class: COM

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

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

Q4 2014
Shares 100 Value ($000) $0 Avg Close — Range —
Q3 2014
Shares 1,800 Value ($000) $1 Avg Close — Range —
Q2 2014
Shares 4,700 Value ($000) $5 Avg Close — Range —
Q1 2014
Shares 2,900 Value ($000) $4 Avg Close — Range —