<SEC-DOCUMENT>0001213900-22-047625-index.html : 20220815
<SEC-HEADER>0001213900-22-047625.hdr.sgml : 20220815
<ACCEPTANCE-DATETIME>20220812203740
ACCESSION NUMBER:		0001213900-22-047625
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20220815
DATE AS OF CHANGE:		20220812

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			cleantech Acquisition Corp.
		CENTRAL INDEX KEY:			0001849820
		STANDARD INDUSTRIAL CLASSIFICATION:	GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC [3569]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-262431
		FILM NUMBER:		221161978

	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>424B3
<SEQUENCE>1
<FILENAME>f424b30822_cleantechacq.htm
<DESCRIPTION>PROSPECTUS
<TEXT>
Document 1 - file: f424b30822_cleantechacq.htm

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

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

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>tkroll_logo.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: tkroll_logo.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>tkroll_footer.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: tkroll_footer.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tsig_duffandphelps.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tsig_duffandphelps.jpg

</DOCUMENT>
</SEC-DOCUMENT>