RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

ALLIANCEBERNSTEIN L.P.'s Holding History (CIK: 0001109448)

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

Q1 2015
Shares 5,300 Value ($000) $21 Avg Close — Range —
Q4 2014
Shares 10,000 Value ($000) $46 Avg Close — Range —
Q3 2014
Shares 10,000 Value ($000) $43 Avg Close — Range —
Q2 2014
Shares 10,000 Value ($000) $88 Avg Close — Range —
Q1 2014
Shares 703 Value ($000) $8 Avg Close — Range —
Q4 2013
Shares 2 Value ($000) $0 Avg Close — Range —
Q3 2013
Shares 3,538 Value ($000) $43 Avg Close — Range —
Q2 2013
Shares 14,300 Value ($000) $115 Avg Close — Range —