RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

SG Americas Securities, LLC's Holding History (CIK: 0001313360)

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

Q1 2015
Shares 11,370 Value ($000) $45 Avg Close — Range —
Q4 2014
Shares 15,328 Value ($000) $70 Avg Close — Range —