STOCK BLDG SUPPLY HLDGS INC

CUSIP: 86101X104 Class: COM

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

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

Q1 2015
Shares 1,194 Value ($000) $22 Avg Close — Range —
Q4 2014
Shares 2,294 Value ($000) $35 Avg Close — Range —
Q3 2014
Shares 2,894 Value ($000) $45 Avg Close — Range —