<SUBMISSION>
<ACCESSION-NUMBER>0001387131-20-011921
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20201229
<ITEMS>5.02
<FILING-DATE>20201229
<DATE-OF-FILING-DATE-CHANGE>20201229
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>ATLANTIC POWER CORP
<CIK>0001419242
<ASSIGNED-SIC>4900
<IRS-NUMBER>550886410
<STATE-OF-INCORPORATION>A1
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-34691
<FILM-NUMBER>201423220
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 155
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
<PHONE>617-977-2400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 155
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>at-8k_122920.htm
<DESCRIPTION>CURRENT REPORT
<TEXT>
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<!-- Field: Rule-Page --><DIV STYLE="margin-top: 12pt; margin-bottom: 3pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>UNITED STATES </B></P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>WASHINGTON, DC 20549</B></P>

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

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

<P STYLE="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-size: 18pt"><B>FORM&nbsp;8-K</B></FONT><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

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

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>CURRENT REPORT</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Pursuant to Section&nbsp;13 or 15(d)&nbsp;of
the</B></P>

<P STYLE="font: 12pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Securities Exchange Act of 1934</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Date of report (Date of earliest event reported):
December 29, 2020&nbsp;(December 21, 2020)</P>

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

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>ATLANTIC POWER CORPORATION</B></P>

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

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

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    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>British Columbia, Canada</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>001-34691</B></FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>55-0886410</B></FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(State or Other Jurisdiction<BR>
of Incorporation)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Commission File Number)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(I.R.S. Employer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Identification No.)</P></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<TR>
    <TD STYLE="vertical-align: top; width: 48%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>3 Allied Drive, Suite 155</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Dedham, MA</B></P></TD>
    <TD STYLE="vertical-align: bottom; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 48%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>02026</B></FONT></TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Address of Principal Executive Offices)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Zip Code)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Registrant&rsquo;s Telephone Number, Including
Area Code <B>(617) 977-2400</B></P>



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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">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 (see General Instruction
A.2. below):</P>

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

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 0 0 6pt"><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Written communication pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)&nbsp;</FONT></P>

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 0 0 6pt"><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)&nbsp;</FONT></P>

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 0 0 6pt"><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Pre-commencement communication pursuant to Rule&nbsp;14d-2(b)&nbsp;under the Exchange Act (17 CFR 240.14d-2(b))&nbsp;</FONT></P>

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 0 0 6pt"><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Pre-commencement communication pursuant to Rule&nbsp;13e-4(c)&nbsp;under the Exchange Act (17 CFR 240.13e-4(c))&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 6pt">Securities registered pursuant to Section 12(b) of the Act:</P>

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<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 34%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Title&nbsp;of&nbsp;Each&nbsp;Class</B></FONT></TD>
    <TD STYLE="width: 1%; padding-bottom: 6pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 32%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Trading&nbsp;Symbol</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 32%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Name&nbsp;of&nbsp;Exchange&nbsp;on&nbsp;which&nbsp;registered</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-bottom: 6pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common Shares, no par value,&nbsp;and the associated Rights to Purchase Common Shares</FONT></TD>
    <TD STYLE="padding-bottom: 6pt">&nbsp;</TD>
    <TD STYLE="padding-bottom: 6pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">AT</FONT></TD>
    <TD STYLE="padding-bottom: 6pt; text-align: center">&nbsp;</TD>
    <TD STYLE="padding-bottom: 6pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The New York Stock Exchange</FONT></TD></TR>
</TABLE>
<P STYLE="font: 1pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">Emerging
growth company </FONT><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;</FONT></P>

<P STYLE="font: 10pt Calibri, Helvetica, Sans-Serif; margin: 6pt 0 0; background-color: white"><FONT STYLE="font-family: Times New Roman, Times, Serif">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><FONT STYLE="font-family: Wingdings">o</FONT><FONT STYLE="font-family: Times New Roman, Times, Serif">&nbsp;&nbsp;&nbsp;</FONT></P>

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


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<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 5.02</B></TD><TD><B>Departures of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements
of Certain Officers.</B></TD></TR></TABLE>

<P><I>(b) Departure of Certain Officers</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 10pt; text-indent: 0.5in">On December 21, 2020, Atlantic Power
Corporation (the &ldquo;Company&rdquo;) and Jeffrey S. Levy, the Company&rsquo;s Senior Vice President, General Counsel and Corporate
Secretary, reached a mutual agreement regarding Mr. Levy&rsquo;s resignation from his employment with the Company, with such resignation
being effective as of 11:59 p.m. Eastern time on January 1, 2021. Mr. Levy will receive a lump sum cash payment of $247,500 in
lieu of his 2020 annual bonus, which will be paid on or before January 8, 2021. Effective as of January 1, 2021, Mr. Levy shall
forfeit all rights, title and interest with respect to unvested notional shares he was previously granted under the Company&rsquo;s
long-term incentive plans.</P>

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

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

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

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

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

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<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Atlantic Power Corporation</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated: December 29, 2020</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By:</FONT></TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Terrence Ronan</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 51%">&nbsp;</TD>
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 5%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Name: </FONT></TD>
    <TD STYLE="width: 40%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Terrence Ronan</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Title:</FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>Chief Financial Officer</I></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="color: navy; font: 8pt Times New Roman, Times, Serif; margin: 1pt 0 0">&nbsp;</P>

<P STYLE="font: 11pt Calibri, Helvetica, Sans-Serif; margin: 0 0 10pt"></P>


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