ASPEN AEROGELS INC

Ticker: ASPN CUSIP: 04523Y105 Class: Common Stock

GAGNON SECURITIES LLC's Holding History (CIK: 0001125725)

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

Q4 2025

Shares 1,133,248 Value ($000) $3,207 Avg Close $5.16 Range $2.79 - $9.35

Q3 2025

Shares 1,754,833 Value ($000) $12,214 Avg Close $7.05 Range $5.75 - $9.78

Q2 2025

Shares 1,899,108 Value ($000) $11,243 Avg Close $5.75 Range $4.16 - $6.92

Q3 2018

Shares 39,240 Value ($000) $179 Avg Close $4.87 Range $4.00 - $5.27

Q2 2018

Shares 39,349 Value ($000) $193 Avg Close $4.75 Range $4.03 - $5.32

Q1 2018

Shares 39,718 Value ($000) $170 Avg Close $4.73 Range $4.18 - $5.58

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,133,248	$3,207	$5.16	$2.79 - $9.35
Q3 2025	1,754,833	$12,214	$7.05	$5.75 - $9.78
Q2 2025	1,899,108	$11,243	$5.75	$4.16 - $6.92
Q3 2018	39,240	$179	$4.87	$4.00 - $5.27
Q2 2018	39,349	$193	$4.75	$4.03 - $5.32
Q1 2018	39,718	$170	$4.73	$4.18 - $5.58