<SEC-DOCUMENT>0000898432-21-000108-index.html : 20210212
<SEC-HEADER>0000898432-21-000108.hdr.sgml : 20210212
<ACCEPTANCE-DATETIME>20210212153349
ACCESSION NUMBER:		0000898432-21-000108
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210212
DATE AS OF CHANGE:		20210212
GROUP MEMBERS:		COLIN MCKAY
GROUP MEMBERS:		TELEMARK FUND, LP

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASPEN AEROGELS INC
		CENTRAL INDEX KEY:			0001145986
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-LUMBER & OTHER CONSTRUCTION MATERIALS [5030]
		IRS NUMBER:				043559972
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-88226
		FILM NUMBER:		21626560

	BUSINESS ADDRESS:	
		STREET 1:		30 FORBES ROAD
		STREET 2:		BUILDING B
		CITY:			NORTHBOROUGH
		STATE:			MA
		ZIP:			01532
		BUSINESS PHONE:		5086911111

	MAIL ADDRESS:	
		STREET 1:		30 FORBES ROAD
		STREET 2:		BUILDING B
		CITY:			NORTHBOROUGH
		STATE:			MA
		ZIP:			01532

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Telemark Asset Management, LLC
		CENTRAL INDEX KEY:			0001420816
		IRS NUMBER:				200269453
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE INTERNATIONAL PLACE, SUITE 4620
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-526-8910

	MAIL ADDRESS:	
		STREET 1:		ONE INTERNATIONAL PLACE, SUITE 4620
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>sc13g-a.htm
<TEXT>
Document 1 - file: sc13g-a.htm

</DOCUMENT>
</SEC-DOCUMENT>