<SEC-DOCUMENT>0001628280-25-034768-index.html : 20250711
<SEC-HEADER>0001628280-25-034768.hdr.sgml : 20250711
<ACCEPTANCE-DATETIME>20250711092342
ACCESSION NUMBER:		0001628280-25-034768
CONFORMED SUBMISSION TYPE:	424B2
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250711
DATE AS OF CHANGE:		20250711

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ESS Tech, Inc.
		CENTRAL INDEX KEY:			0001819438
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				981550150
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B2
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-268138
		FILM NUMBER:		251117671

	BUSINESS ADDRESS:	
		STREET 1:		26440 SW PARKWAY AVE.
		STREET 2:		BLDG. 83
		CITY:			WILSONVILLE
		STATE:			OR
		ZIP:			97070
		BUSINESS PHONE:		(855) 423-9920

	MAIL ADDRESS:	
		STREET 1:		26440 SW PARKWAY AVE.
		STREET 2:		BLDG. 83
		CITY:			WILSONVILLE
		STATE:			OR
		ZIP:			97070

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ACON S2 Acquisition Corp.
		DATE OF NAME CHANGE:	20200728
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B2
<SEQUENCE>1
<FILENAME>prospectussupplementjuly20.htm
<DESCRIPTION>424B2
<TEXT>
Document 1 - file: prospectussupplementjuly20.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>backcover1aa.jpg
<TEXT>
Document 2 - file: backcover1aa.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>esslogo.jpg
<TEXT>
Document 3 - file: esslogo.jpg

</DOCUMENT>
</SEC-DOCUMENT>