<SEC-DOCUMENT>0001213900-21-039636.txt : 20210802
<SEC-HEADER>0001213900-21-039636.hdr.sgml : 20210802
<ACCEPTANCE-DATETIME>20210730194343
ACCESSION NUMBER:		0001213900-21-039636
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20210730
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20210802
DATE AS OF CHANGE:		20210730

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
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-40611
		FILM NUMBER:		211134183

	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>8-K
<SEQUENCE>1
<FILENAME>ea145071-8k_cleantech.htm
<DESCRIPTION>CURRENT REPORT
<TEXT>
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<!-- Field: Rule-Page --><DIV STYLE="margin: 0pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>United States</B>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION </B>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>Washington, D.C. 20549 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>Form 8-K </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>Current Report </B>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>Pursuant to Section 13 or 15(d) of the </B>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>Securities Exchange Act of 1934 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>July 30, 2021</B>&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">Date of Report (Date of earliest event reported)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>CleanTech Acquisition Corp.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">(Exact Name of Registrant as Specified in its Charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="1" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: black 1.5pt solid; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1.5pt solid; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>001-40611</B></FONT></TD>
    <TD STYLE="width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: black 1.5pt solid; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>85-1699753</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(State or other jurisdiction<BR>
of incorporation)&nbsp;</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(Commission File Number)&nbsp;</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(I.R.S. Employer<BR>
Identification No.)&nbsp;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: top; width: 49%; border-bottom: black 1.5pt solid">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>207 West 25th Street, 9th Floor</B></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>New York, NY</B></P></TD>
    <TD STYLE="width: 2%; text-align: center">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 49%; border-bottom: black 1.5pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>10001</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(Address of Principal Executive Offices)&nbsp;</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">(Zip Code)&nbsp;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">Registrant&rsquo;s telephone number, including area
code: <B>(212) 494-9005</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">N/A</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">(Former name or former address, if changed since last
report)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">Check the appropriate box below if the Form 8-K filing
is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Written communications pursuant to Rule 425 under the Securities Act</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-indent: 35.1pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Soliciting material pursuant to Rule 14a-12 under the Exchange Act</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-indent: 35.1pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-indent: 35.1pt">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-indent: 35.1pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">Securities registered pursuant to Section 12(b) of
the Act:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="1" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 34%; border-bottom: black 1.5pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Title of each class</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 32%; border-bottom: black 1.5pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Trading Symbol(s)</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 32%; border-bottom: black 1.5pt solid; text-align: center"><FONT STYLE="font-size: 10pt"><B>Name of each exchange on which <BR>
registered</B></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Common Stock</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">CLAQ</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">The Nasdaq Stock Market LLC</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Warrants</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">CLAQW</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">The Nasdaq Stock Market LLC</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Rights</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">CLAQR</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">The Nasdaq Stock Market LLC</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom; background-color: white">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">Units</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">CLAQU</FONT></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">The Nasdaq Stock Market LLC</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">Indicate by check mark whether the registrant is an
emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR &sect;230.405) or Rule 12b-2 of the Securities Exchange
Act of 1934 (17 CFR &sect;240.12b-2).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">Emerging growth company <FONT STYLE="font-family: Times New Roman, Times, Serif">&#9746;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">If an emerging growth company, indicate by check mark
if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards
provided pursuant to Section 13(a) of the Exchange Act. <FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><B>Item 8.01. Other Events.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;On July 30, 2021,
CleanTech Acquisition Corp. (the &ldquo;Company&rdquo;) issued a press release, a copy of which is attached as Exhibit 99.1 to this Current
Report on Form 8-K, announcing that the holders of the Company&rsquo;s units (the &ldquo;Units&rdquo;) may elect to separately trade the
shares of common stock, par value $0.0001 per share (the &ldquo;Common Stock&rdquo;), rights (the &ldquo;Rights&rdquo;), and warrants
(the &ldquo;Warrants&rdquo;) included in the Units commencing on or about August 4, 2021. Each Unit consists of one share of Common Stock,
one Right and one-half of one redeemable Warrant. Each Right entitles the holder thereof to receive one-twentieth (1/20) of one share
of Common Stock upon the consummation of an initial business combination. Each whole Warrant entitles the holder thereof to purchase one
share of Common Stock at a price of $11.50 per whole share (subject to adjustment). Any Units not separated will continue to trade on
the Nasdaq Capital Market (&ldquo;Nasdaq&rdquo;) under the symbol &ldquo;CLAQU&rdquo;, and the Common Stock, Rights and Warrants will
separately trade on Nasdaq under the symbols &ldquo;CLAQ,&rdquo; &ldquo;CLAQR,&rdquo; and &ldquo;CLAQW&rdquo;, respectively. No fractional
Warrants will be issued upon separation of the Units and only whole Warrants will trade. Holders of Units will need to have their brokers
contact Continental Stock Transfer &amp; Trust Company, the Company&rsquo;s transfer agent, in order to separate the Units into Common
Stock, Rights and Warrants.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0"><B>Item 9.01. Financial Statements and Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 77px; border-bottom: black 1pt solid"><FONT STYLE="font-size: 10pt; color: Black">Exhibit No.</FONT></TD>
    <TD STYLE="width: 19px"><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; text-align: justify"><FONT STYLE="font-size: 10pt; color: Black">Description</FONT></TD></TR>
  <TR STYLE="vertical-align: top; background-color: rgb(204,238,255)">
    <TD><FONT STYLE="font-size: 10pt; color: Black">99.1</FONT></TD>
    <TD><FONT STYLE="color: Black">&nbsp;</FONT></TD>
    <TD><FONT STYLE="font-size: 10pt; color: Black"><A HREF="ea145071ex99-1_cleantech.htm">Press Release, dated July 30, 2021.</A></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0.25in; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">Pursuant to the requirements of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">Dated: July 30, 2021</FONT></TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="white-space: nowrap">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">CLEANTECH ACQUISITION CORP.</FONT></TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="white-space: nowrap">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="white-space: nowrap; width: 5%"><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="white-space: nowrap; width: 35%; border-bottom: black 1.5pt solid"><FONT STYLE="font-size: 10pt">/s/ Eli Spiro&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
    <TD STYLE="width: 60%">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">Name:&nbsp; </FONT></TD>
    <TD STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">Eli Spiro</FONT></TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">Title: </FONT></TD>
    <TD STYLE="white-space: nowrap"><FONT STYLE="font-size: 10pt">Chief Executive Officer</FONT></TD>
    <TD>&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0pt 0pt 0; text-align: center"></P>

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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ea145071ex99-1_cleantech.htm
<DESCRIPTION>PRESS RELEASE, DATED JULY 30, 2021.
<TEXT>
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<P STYLE="text-align: right; font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B>Exhibit 99.1</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="color: Black"><B>CleanTech
Acquisition Corp. Announces the Separate Trading of its Common Stock, Rights and Warrants, Commencing August 4, 2021</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">NEW YORK, July 30, 2021 (GLOBE NEWSWIRE)
-- CleanTech Acquisition Corp. (the &quot;Company&quot;) announced today that, commencing August 4, 2021, holders of the units sold in
the Company&rsquo;s initial public offering completed on July 19, 2021, may elect to separately trade the shares of common stock, rights
and warrants included in such units on The Nasdaq Capital Market (&ldquo;Nasdaq&rdquo;).</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">No fractional warrants will be issued upon
separation of the units and only whole warrants will trade. The common stock, rights and warrants that are separated will trade on Nasdaq
under the symbols &quot;CLAQ,&quot; &quot;CLAQR&quot; and &quot;CLAQW,&quot; respectively. Those units not separated will continue to
trade on Nasdaq under the symbol &ldquo;CLAQU.&rdquo; Holders of units will need to have their brokers contact Continental Stock Transfer
&amp; Trust Company, the Company&rsquo;s transfer agent, in order to separate the units into ordinary shares and warrants.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">The units were initially offered by the Company
in an underwritten offering. Chardan acted as sole book-running manager of the offering. A registration statement relating to these securities
was declared effective by the U.S. Securities and Exchange Commission (the &quot;SEC&quot;) on July 14, 2021. The offering was made only
by means of a prospectus, copies of which may be obtained by contacting Chardan, 17 State Street, 21st Floor, New York, New York 10004.
Copies of the registration statement can be accessed through the SEC's website at www.sec.gov.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">This press release shall not constitute an
offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in
which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such
state or jurisdiction.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B>About CleanTech Acquisition Corp.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B></B>CleanTech Acquisition Corp.
is a blank check company formed for the purpose of entering into a merger, share exchange, asset acquisition, stock purchase, recapitalization,
reorganization or other similar business combination with one or more businesses or entities. While CleanTech Acquisition Corp. may pursue
an initial business combination in any region or sector, CleanTech Acquisition Corp. will seek to identify, through its management team&rsquo;s
experience and expertise, a business that aims to contribute towards the mission of shifting the world away from carbon dependency and
facilitating a greener future.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B>Forward Looking Statements</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black"><B></B></FONT>This press release includes
forward-looking statements that involve risks and uncertainties. Forward looking statements are statements that are not historical facts.
Such forward-looking statements, including the Company&rsquo;s search for an initial business combination, are subject to risks and uncertainties,
which could cause actual results to differ from the forward-looking statements. The Company expressly disclaims any obligations or undertaking
to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in the Company's
expectations with respect thereto or any change in events, conditions or circumstances on which any statement is based.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">Contact:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">Eli Spiro</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">Chief Executive Officer, CleanTech Acquisition
Corp.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">(917) 699-5990</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"><FONT STYLE="color: Black">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt"></P>

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