<SEC-DOCUMENT>0001357550-22-000056-index.html : 20220207
<SEC-HEADER>0001357550-22-000056.hdr.sgml : 20220207
<ACCEPTANCE-DATETIME>20220207121145
ACCESSION NUMBER:		0001357550-22-000056
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20220207
DATE AS OF CHANGE:		20220207

SUBJECT COMPANY:	

	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:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-92701
		FILM NUMBER:		22596367

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Weiss Asset Management LP
		CENTRAL INDEX KEY:			0001357550
		IRS NUMBER:				611451623
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		222 BERKELEY STREET, 16TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116
		BUSINESS PHONE:		617-778-7780

	MAIL ADDRESS:	
		STREET 1:		222 BERKELEY STREET, 16TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WEISS CAPITAL LLC
		DATE OF NAME CHANGE:	20060327
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>claq13g31dec2021.htm
<TEXT>
Document 1 - file: claq13g31dec2021.htm

</DOCUMENT>
</SEC-DOCUMENT>