RUBICON TECHNOLOGY INC

CUSIP: 78112T107 Class: COM

VANGUARD GROUP INC's Holding History (CIK: 0000102909)

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

Q1 2017
Shares 285,467 Value ($000) $238 Avg Close — Range —
Q4 2016
Shares 284,967 Value ($000) $176 Avg Close — Range —
Q3 2016
Shares 719,016 Value ($000) $453 Avg Close — Range —
Q2 2016
Shares 742,800 Value ($000) $505 Avg Close — Range —
Q1 2016
Shares 742,800 Value ($000) $542 Avg Close — Range —
Q4 2015
Shares 762,874 Value ($000) $869 Avg Close — Range —
Q3 2015
Shares 768,176 Value ($000) $791 Avg Close — Range —
Q2 2015
Shares 761,892 Value ($000) $1,851 Avg Close — Range —
Q1 2015
Shares 765,332 Value ($000) $3,015 Avg Close — Range —
Q4 2014
Shares 729,093 Value ($000) $3,332 Avg Close — Range —
Q3 2014
Shares 695,431 Value ($000) $2,956 Avg Close — Range —
Q2 2014
Shares 797,347 Value ($000) $6,977 Avg Close — Range —
Q1 2014
Shares 784,862 Value ($000) $8,861 Avg Close — Range —
Q4 2013
Shares 601,249 Value ($000) $5,982 Avg Close — Range —
Q3 2013
Shares 587,188 Value ($000) $7,111 Avg Close — Range —
Q2 2013
Shares 561,232 Value ($000) $4,496 Avg Close — Range —