RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q1 2016
Shares 11,476 Value ($000) $8 Avg Close — Range —
Q4 2015
Shares 3,181 Value ($000) $4 Avg Close — Range —
Q3 2015
Shares 10,309 Value ($000) $11 Avg Close — Range —
Q2 2015
Shares 708 Value ($000) $2 Avg Close — Range —
Q1 2015
Shares 1,080 Value ($000) $4 Avg Close — Range —
Q4 2014
Shares 8,269 Value ($000) $38 Avg Close — Range —
Q3 2014
Shares 427 Value ($000) $2 Avg Close — Range —
Q2 2014
Shares 664 Value ($000) $6 Avg Close — Range —
Q1 2014
Shares 1,188 Value ($000) $13 Avg Close — Range —
Q4 2013
Shares 3,332 Value ($000) $33 Avg Close — Range —
Q3 2013
Shares 5,904 Value ($000) $71 Avg Close — Range —
Q2 2013
Shares 3,443 Value ($000) $27 Avg Close — Range —