<SEC-DOCUMENT>0001213900-21-037207-index.html : 20210716
<SEC-HEADER>0001213900-21-037207.hdr.sgml : 20210716
<ACCEPTANCE-DATETIME>20210716144959
ACCESSION NUMBER:		0001213900-21-037207
CONFORMED SUBMISSION TYPE:	424B4
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210716
DATE AS OF CHANGE:		20210716

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:		424B4
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-256578
		FILM NUMBER:		211095246

	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>424B4
<SEQUENCE>1
<FILENAME>f424b40721_cleantech.htm
<DESCRIPTION>PROSPECTUS
<TEXT>
Document 1 - file: f424b40721_cleantech.htm

</DOCUMENT>
</SEC-DOCUMENT>