RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q3 2014
Shares 140,066 Value ($000) $595 Avg Close — Range —
Q2 2014
Shares 141,725 Value ($000) $1,240 Avg Close — Range —
Q1 2014
Shares 136,551 Value ($000) $1,542 Avg Close — Range —
Q4 2013
Shares 103,144 Value ($000) $1,026 Avg Close — Range —
Q3 2013
Shares 96,599 Value ($000) $1,170 Avg Close — Range —
Q2 2013
Shares 90,595 Value ($000) $726 Avg Close — Range —