    <SEC-DOCUMENT>0001104659-24-045568-index.html : 20240410
    <SEC-HEADER>0001104659-24-045568.hdr.sgml : 20240410
    <ACCEPTANCE-DATETIME>20240410073235
    ACCESSION NUMBER:		0001104659-24-045568
    CONFORMED SUBMISSION TYPE:	ARS
    PUBLIC DOCUMENT COUNT:		1
    CONFORMED PERIOD OF REPORT:	20231231
    FILED AS OF DATE:		20240410
    DATE AS OF CHANGE:		20240410
    EFFECTIVENESS DATE:		20240410

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ASPEN AEROGELS INC
    		CENTRAL INDEX KEY:			0001145986
    		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-LUMBER & OTHER CONSTRUCTION MATERIALS [5030]
    		ORGANIZATION NAME:           	07 Trade & Services
    		IRS NUMBER:				043559972
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		ARS
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36481
    		FILM NUMBER:		24834258

    	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
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>ARS
    <SEQUENCE>1
    <FILENAME>tm2411401d1_ars.pdf
    <DESCRIPTION>ARS
    <TEXT>
    Document 1 - file: tm2411401d1_ars.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>