AMTECH SYS INC

Ticker: ASYS CUSIP: 032332504 Class: COM PAR $0.01N

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q1 2015

Shares 136,307 Value ($000) $1,524 Avg Close $10.05 Range $7.96 - $12.59

Q3 2013

Shares 25,230 Value ($000) $184 Avg Close $6.68 Range $5.44 - $7.70

Q2 2013

Shares 25,230 Value ($000) $160 Avg Close $4.48 Range $3.21 - $7.93

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	136,307	$1,524	$10.05	$7.96 - $12.59
Q3 2013	25,230	$184	$6.68	$5.44 - $7.70
Q2 2013	25,230	$160	$4.48	$3.21 - $7.93