ASPEN AEROGELS INC

Ticker: ASPN CUSIP: 04523Y105 Class: Common Stock

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q4 2016

Shares 12,882 Value ($000) $53 Avg Close $4.87 Range $3.61 - $6.71

Q3 2016

Shares 12,882 Value ($000) $77 Avg Close $5.04 Range $4.42 - $6.29

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	12,882	$53	$4.87	$3.61 - $6.71
Q3 2016	12,882	$77	$5.04	$4.42 - $6.29