RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q2 2015
Shares 46,056 Value ($000) $112 Avg Close — Range —
Q1 2014
Shares 46,935 Value ($000) $530 Avg Close — Range —