ASPEN AEROGELS INC

Ticker: ASPN CUSIP: 04523Y105 Class: Common Stock

NATIONAL BANK OF CANADA /FI/'s Holding History (CIK: 0000926171)

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

Q4 2025

Shares 200 Value ($000) $1 Avg Close $5.16 Range $2.79 - $9.35

Q3 2025

Shares 527 Value ($000) $4 Avg Close $7.05 Range $5.75 - $9.78

Q4 2021

Shares 8,982 Value ($000) $447 Avg Close $52.70 Range $43.28 - $65.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	200	$1	$5.16	$2.79 - $9.35
Q3 2025	527	$4	$7.05	$5.75 - $9.78
Q4 2021	8,982	$447	$52.70	$43.28 - $65.99