RUBICON TECHNOLOGY INC

Ticker: RBCN CUSIP: 78112T206 Class: Equities

FMR LLC's Holding History (CIK: 0000315066)

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

Q2 2018

Shares 13,440 Value ($000) $106 Avg Close $7.38 Range $6.76 - $8.06

Q1 2018

Shares 13,440 Value ($000) $93 Avg Close $7.49 Range $6.95 - $8.39

Q4 2017

Shares 131,205 Value ($000) $1,050 Avg Close $8.17 Range $7.51 - $9.05

Q3 2017

Shares 131,205 Value ($000) $1,084 Avg Close $8.22 Range $6.71 - $9.41

Q2 2017

Shares 276,320 Value ($000) $2,558 Avg Close $8.54 Range $6.40 - $10.45

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	13,440	$106	$7.38	$6.76 - $8.06
Q1 2018	13,440	$93	$7.49	$6.95 - $8.39
Q4 2017	131,205	$1,050	$8.17	$7.51 - $9.05
Q3 2017	131,205	$1,084	$8.22	$6.71 - $9.41
Q2 2017	276,320	$2,558	$8.54	$6.40 - $10.45