<SEC-DOCUMENT>0001213900-21-034037-index.html : 20210625
<SEC-HEADER>0001213900-21-034037.hdr.sgml : 20210625
<ACCEPTANCE-DATETIME>20210624193551
ACCESSION NUMBER:		0001213900-21-034037
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20210625
DATE AS OF CHANGE:		20210624

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			cleantech Acquisition Corp.
		CENTRAL INDEX KEY:			0001849820
		STANDARD INDUSTRIAL CLASSIFICATION:	BLANK CHECKS [6770]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-256578
		FILM NUMBER:		211044255

	BUSINESS ADDRESS:	
		STREET 1:		1 EAST PUTNAM AVENUE, FLOOR 4
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
		BUSINESS PHONE:		6464659000

	MAIL ADDRESS:	
		STREET 1:		1 EAST PUTNAM AVENUE, FLOOR 4
		CITY:			GREENWICH
		STATE:			CT
		ZIP:			06830
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-1/A
<SEQUENCE>1
<FILENAME>fs12021a2_cleantechacq.htm
<DESCRIPTION>REGISTRATION STATEMENT
<TEXT>
Document 1 - file: fs12021a2_cleantechacq.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>fs12021a2ex23-1_cleantechacq.htm
<DESCRIPTION>CONSENT OF WITHUMSMITH+BROWN, PC
<TEXT>
Document 2 - file: fs12021a2ex23-1_cleantechacq.htm

</DOCUMENT>
</SEC-DOCUMENT>