RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q2 2015
Shares 3,928 Value ($000) $9 Avg Close — Range —
Q4 2014
Shares 2,404 Value ($000) $11 Avg Close — Range —