<SUBMISSION>
<ACCESSION-NUMBER>0001104659-16-131375
<TYPE>SC TO-I/A
<PUBLIC-DOCUMENT-COUNT>1
<FILING-DATE>20160707
<DATE-OF-FILING-DATE-CHANGE>20160706
<SUBJECT-COMPANY>
<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>SC TO-I/A
<ACT>34
<FILE-NUMBER>005-87139
<FILM-NUMBER>161755299
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 220
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
<PHONE>617-977-2400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 220
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
</MAIL-ADDRESS>
</SUBJECT-COMPANY>
<FILED-BY>
<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>SC TO-I/A
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 220
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
<PHONE>617-977-2400
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3 ALLIED DRIVE
<STREET2>SUITE 220
<CITY>DEDHAM
<STATE>MA
<ZIP>02026
</MAIL-ADDRESS>
</FILED-BY>
<DOCUMENT>
<TYPE>SC TO-I/A
<SEQUENCE>1
<FILENAME>a16-14569_1sctoia.htm
<DESCRIPTION>SC TO-I/A
<TEXT>


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<p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">UNITED STATES</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Washington, D.C. 20549</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">SCHEDULE TO</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(Amendment No.&nbsp;2)</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="3" face="Times New Roman" style="font-size:12.0pt;font-weight:bold;">Tender Offer Statement under Section&nbsp;14(d)(1)&nbsp;or Section&nbsp;13(e)(1)<br> of the Securities Exchange Act of 1934</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="5" face="Times New Roman" style="font-size:18.0pt;font-weight:bold;">ATLANTIC POWER CORPORATION</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name of Subject Company and Filing Person (Issuer) and Name of Filing Person (Offeror))</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">5.75% Series&nbsp;C Convertible Unsecured Subordinated Debentures due June&nbsp;2019</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Title of Class&nbsp;of Securities)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">04878QAQ6</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(CUSIP Number of Class&nbsp;of Securities)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Jeffrey S. Levy,&nbsp;Esq.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Senior Vice President and General Counsel</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">3 Allied Drive, Suite&nbsp;220</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Dedham, Massachusetts</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">(617) 977-2400</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(Name, address and telephone number of person authorized to<br> receive notices and communications on behalf of filing person)</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Copy to:</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Craig B. Brod,&nbsp;Esq.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Pamela L. Marcogliese,&nbsp;Esq.</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Cleary Gottlieb Steen&nbsp;&amp; Hamilton LLP</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">One Liberty Plaza</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">New York, New York 10006</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(212) 225-2000</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div align="center" style="margin:0in 0in .0001pt;text-align:center;"><hr size="1" width="25%" noshade align="center" style="color:black;"></div>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">CALCULATION OF FILING FEE</font></b></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Transaction&nbsp;Valuation</font></b><b><font size="1" style="font-size:5.0pt;font-weight:bold;position:relative;top:-3.0pt;">(1)</font></b></p>    </td>
<td width="2%" valign="bottom" style="padding:0in 0in 0in 0in;width:2.68%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
<td width="50%" valign="bottom" style="border:none;border-bottom:solid windowtext 1.0pt;padding:0in 0in 0in 0in;width:50.9%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Amount&nbsp;of&nbsp;Filing&nbsp;Fee</font></b><b><font size="1" style="font-size:5.0pt;font-weight:bold;position:relative;top:-3.0pt;">(2)</font></b></p>    </td>   </tr>
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<td width="46%" valign="top" bgcolor="black" style="background:white;padding:0in 0in 0in 0in;width:46.42%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$62,725,000</font></p>    </td>
<td width="2%" valign="top" bgcolor="black" style="background:white;padding:0in 0in 0in 0in;width:2.68%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="50%" valign="top" bgcolor="black" style="background:white;padding:0in 0in 0in 0in;width:50.9%;">
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">$6,316.41</font></p>    </td>   </tr>  </table>
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<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<div style="margin:0in 0in .0001pt;"><hr size="1" width="25%" noshade align="left" style="color:black;"></div>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="1" face="Times New Roman" style="font-size:6.5pt;position:relative;top:-3.0pt;">(1)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Calculated solely for the purposes of determining the filing fee based upon a transaction value of $62,725,000. The purchase price of the 5.75% Series&nbsp;C Convertible Unsecured Debentures due June&nbsp;2019 (the &#147;Debentures&#148;), as described herein, is $965 per $1,000 principal amount outstanding. The Company is seeking to acquire up to $65,000,000 of Debentures resulting in an aggregate maximum purchase price of $62,725,000.</p>
<p style="margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .25in;text-indent:-.25in;"><font size="1" face="Times New Roman" style="font-size:6.5pt;position:relative;top:-3.0pt;">(2)</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>The amount of the filing fee equals $100.70 for each $1,000,000 of the value of the transaction.</p>
<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Check the box if any part of the fee is offset as provided by Rule&nbsp;0-11(a)(2)&nbsp;and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form&nbsp;or Schedule and the date of its filing.</p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;text-indent:23.65pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt .5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amount Previously Paid: $6,316.41</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Filing Party:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Atlantic Power Corporation</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt .5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Form&nbsp;of Registration No.: Schedule TO</font></p>    </td>
<td width="10%" valign="top" style="padding:0in 0in 0in 0in;width:10.26%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date Filed:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">June&nbsp;17, 2016</font></p>    </td>   </tr>  </table>
<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt .5in;text-indent:-.5in;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Check the box if filing relates solely to preliminary communications made before the commencement of a tender offer.</p>
<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt .05in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the appropriate boxes below to designate any transactions to which the statement relates:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>third-party tender offer subject to Rule&nbsp;14d-1.</p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">x</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>issuer tender offer subject to Rule&nbsp;13e-4.</p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>going-private transaction subject to Rule&nbsp;13e-3.</p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Wingdings" style="font-size:10.0pt;">o</font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>amendment to Schedule&nbsp;13D under Rule&nbsp;13d-2.</p>
<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Check the following box if the filing is a final amendment reporting the results of the tender offer: </font><font face="Wingdings">o</font></p>
<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
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<p style="border:none;margin:0in 0in .0001pt;padding:0in;"><font size="1" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="1" face="Times New Roman" style="font-size:8.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">This Amendment No.&nbsp;2 (this &#147;<b>Amendment</b>&#148;) amends and supplements the Tender Offer Statement on Schedule TO (the &#147;<b>Schedule TO</b>&#148;) previously filed by Atlantic Power Corporation (the &#147;<b>Company</b>&#148;) on June&nbsp;17, 2016, as amended by Amendment No.&nbsp;1, dated June&nbsp;22, 2016.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The Schedule TO relates to the offer (the &#147;<b>Offer</b>&#148;) by the Company to purchase up to $65,000,000 aggregate principal amount of the Company&#146;s outstanding 5.75% Series&nbsp;C Convertible Unsecured Subordinated Debentures due June&nbsp;2019 (the &#147;<b>Debentures</b>&#148;) for cash, at the purchase price of US$965 per US$1,000 principal amount of Debentures, plus accrued and unpaid interest to, but not including, the payment date, upon the terms and subject to the conditions set forth in the Offer to Purchase and related Issuer Bid Circular, each dated June&nbsp;16, 2016 (as they may be amended and supplemented from time to time, the &#147;<b>Offer and Circular</b>&#148;), and the related Letter of Transmittal, as it may be amended and supplemented from time to time, copies of which were attached to the Schedule TO as Exhibits (a)(1)(i)&nbsp;and (a)(1)(ii), respectively. Capitalized terms used but not defined in this Amendment shall have the meanings given to them in the Offer and Circular.</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">Items 1 through 11.</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The section of the Offer and Circular entitled &#147;Summary &#151; Payment Date&#148; is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="font-size:10.0pt;margin:0in 0in .0001pt 1.5in;text-indent:-1.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;<b>Payment Date</b></font><font size="1" style="font-size:3.0pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font>Atlantic Power will take up and pay for the Debentures promptly after the Expiration Date and in any event within three business days after the Expiration Date.&#148;</p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (v)&nbsp;in the first paragraph of the section of the Offer and Circular entitled &#147;Summary &#151; 4.&nbsp;Withdrawal Rights&#148; is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;(v)&nbsp;if not yet accepted for payment by August&nbsp;12, 2016, which is 40 business days after the commencement of the Offer.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (v)&nbsp;in the first paragraph of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 4.&nbsp;Withdrawal Rights&#148; is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;if not yet accepted for payment by August&nbsp;12, 2016, which is 40 business days after the commencement of the Offer.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Paragraph three in the sections of the Offer and Circular entitled &#147;Offer to Purchase &#151; 7.&nbsp;Taking up and Payment for Deposited Debentures&#148; and &#147;Issuer Bid Circular &#151; 8.&nbsp;Acceptance for Payment and Payment for the Debentures &#151; Payment&#148;, respectively, is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;In the event of pro-ration of Debentures deposited pursuant to the Offer, the Company will determine the pro-ration factor and pay for those deposited Debentures accepted for payment promptly after the Expiration Date and will announce the final results of any such pro-ration.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The introductory paragraph of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is hereby amended and restated as follows:</font></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Notwithstanding any other provision of the Offer and subject to applicable law, including Rule&nbsp;14e-1(c)&nbsp;of the Exchange Act, the Company shall not be required to accept for purchase, to purchase or to pay for any Debentures deposited, and may withdraw, terminate, cancel or amend the Offer or extend the period of time during which the Offer is open if, at any time before the Expiration Date, any of the following events shall have occurred (or shall have been determined by the Company, in its reasonable judgment, to have occurred) which, in the Company&#146;s reasonable judgment, in any such case and regardless of the circumstances, makes it inadvisable to proceed with the Offer:&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (a)(ii)&nbsp;of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is hereby amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;that otherwise, in the reasonable judgment of the Company, has or may have a material adverse effect on the Debentures or the business, income, condition (financial or otherwise), properties, operations, results of operations or prospects of the Company and its subsidiaries taken as a whole or has impaired or may materially impair the contemplated benefits of the Offer to the Company;&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (b)&nbsp;of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is hereby amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;there shall have been any action or proceeding threatened, pending or taken or approval withheld or any statute, rule, regulation, stay, decree, judgment or order or injunction proposed, sought, enacted, enforced, promulgated, amended, issued or deemed applicable to the Offer or the Company or any of its subsidiaries by any court, government or governmental authority or regulatory or administrative agency or any statute, rule&nbsp;or regulation shall become operative or applicable in any jurisdiction that would directly or indirectly result in any of the consequences referred to in clauses (i)&nbsp;or (ii)&nbsp;of paragraph (a)&nbsp;above or would prohibit, prevent, restrict or delay consummation of the Offer or would materially impair the contemplated benefits of the Offer to the Company or otherwise make it inadvisable, in the reasonable judgment of the Company, to proceed with the Offer;&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (c)(iv)&nbsp;of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is hereby amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;any limitation by any government or governmental authority or regulatory or administrative authority or agency or any other event that would reasonably be expected to affect the extension of credit by banks or other lending institutions to the Company;&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (g)&nbsp;of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;the Company shall have concluded, in its reasonable discretion, that the Offer or the take-up and payment for any or all of the Debentures by the Company is illegal or not in compliance with applicable law, or that necessary exemptions or approvals under applicable securities legislation, including the exemption from the obligation to take-up Debentures in the event the Offer is extended in certain circumstances, are not available or not available on terms reasonably acceptable to the Company in respect of the Offer and, if required under any such legislation, the Company shall not have received the necessary exemptions from, or waivers, of the appropriate courts or securities regulatory authorities in respect of the Offer;&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Clause (h)&nbsp;of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;any change shall have occurred or been proposed to the <i>Income Tax Act</i> (Canada) (including the regulations thereto), the application thereof pursuant to any judicial decision or to the publicly available administrative policies or assessing practices of the Canada Revenue Agency that, in the reasonable judgment of the Company, is detrimental to Atlantic Power, its subsidiaries or affiliates or a Debentureholder, or with respect to making the Offer or taking up and paying for the Debentures pursuant to the Offer.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In the ultimate paragraph of the section of the Offer and Circular entitled &#147;Offer to Purchase &#151; 5.&nbsp;Conditions of the Offer&#148; the first sentence shall be replaced with the following two sentences:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;The foregoing conditions are for the exclusive benefit of the Company and may be asserted by the Company at any time prior to the Expiration Date in its reasonable discretion regardless of the circumstances giving rise to any such assertion, or may (subject to applicable law) be waived by the Company in whole or in part at any time prior to the Expiration Date in its discretion, without prejudice to any other rights which the Company may have. Each of the foregoing conditions must be satisfied or waived at or prior to the Expiration Date.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In the section of the Offer and Circular entitled &#147;Issuer Bid Circular &#151; 11.&nbsp;Other Terms&#148; the last two sentences of the fifth paragraph are hereby amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;The Offer is not being made to (nor will deposits of Debentures be accepted from or on behalf of) any person in any state jurisdiction within the United States of America in which the Company is prohibited from making such offer or solicitation by administrative or judicial action pursuant to a state statute after a good faith effort of the Company to comply with such statute. If the Company becomes aware of any valid law of any state jurisdiction prohibiting the making of the Offer or the acceptance of Debentures (and from which it does not have an exemption), it will make a good faith effort to comply with that law or seek to have such law declared inapplicable to the Offer. If after a good faith effort, the Company cannot comply with the law of that state jurisdiction, it will not market the Offer to, nor will it accept Debentures from or on behalf of, Debentureholders from that jurisdiction.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The second paragraph on the front page&nbsp;of the Offer and Circular is amended and restated as follows:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;This document does not constitute an offer or a solicitation to any person in any state jurisdiction within the United States of America in which the Company (as defined herein) is prohibited from making such offer or solicitation by administrative or judicial action pursuant to a state statute after a good faith effort of the Company to comply with such statute. If the Company becomes aware of any valid law of any state jurisdiction prohibiting the making of the Offer or the acceptance of Debentures (as defined herein) (and from which it does not have an exemption), it will make a good faith effort to comply with that law or seek to have such law declared inapplicable to the Offer. If after a good faith effort, the Company cannot comply with the law of that state jurisdiction, it will not market the Offer to, nor will it accept Debentures from or on behalf of, Debentureholders (as defined herein) from that jurisdiction.&#148;</font></p>
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<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In the second paragraph in the section of the Offer and Circular entitled &#147;Issuer Bid Circular &#151; 5.&nbsp;Valuation of the Debentures &#151; Assumptions and Limitations&#148; the following sentence is deleted:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Alexander Capital disclaims responsibility for the information furnished by Atlantic Power.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">In the second paragraph on page&nbsp;A-5 in Schedule A of the Offer and Circular, the following sentence is deleted:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Alexander Capital assumes no responsibility for the information furnished to us.&#148;</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">The first sentence of the third paragraph in the section of the Offer and Circular entitled &#147;Issuer Bid Circular &#151; 5.&nbsp;Valuation of the Debentures &#151; Assumptions and Limitations&#148; is replaced with the following sentences:</font></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&#147;Alexander Capital&#146;s Formal Valuation states that Alexander Capital shall have no responsibility whatsoever to any third party, that any use a third party makes of the Formal Valuation is entirely at its own risk, that the Formal Valuation has been prepared and provided solely for the use of the Board and for inclusion in the Offer and Circular, and that it may not be used or relied upon by any other person without Alexander Capital&#146;s express prior written consent (the &#147;<b>Disclaimer Statements</b>&#148;). The Formal Valuation is addressed to the Board of Directors of Atlantic Power, and was prepared solely for the purpose of providing advice to the Board of Directors in forming its view regarding the value of the Debentures. The engagement letter between Alexander Capital and Atlantic Power specifically provides that the opinions, advice and materials, including any report, to be provided by Alexander Capital in carrying out its engagement are intended solely for the use of Atlantic Power, its Board of Directors and its affiliates. Therefore, Alexander Capital believes that under applicable law, holders of Debentures cannot rely on its Formal Valuation. Alexander Capital has indicated that it intends to assert the substance of the Disclaimer Statements as a defense to any claims by Debentureholders that might be brought against it under applicable law. Alexander Capital does not believe that applicable law has addressed the availability of such a defense in connection with any such Debentureholder claim. The issue necessarily would have to be resolved by a court of competent jurisdiction, and the availability or non-availability of such a defense will have no effect on the rights and responsibilities of the Company&#146;s Board of Directors under any applicable law, or the rights and responsibilities of the Board of Directors or Alexander Capital under the U.S. federal securities laws.&#148;</font></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">SIGNATURE</font></b></p>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p style="margin:0in 0in .0001pt;text-indent:.5in;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">After due inquiry and to the best of my knowledge and belief,&nbsp;I certify that the information set forth in this statement is true, complete and correct.</font></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">ATLANTIC POWER CORPORATION</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.16%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">By:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">/s/ James J.   Moore,&nbsp;Jr.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.16%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
<td width="5%" valign="top" style="padding:0in 0in 0in 0in;width:5.84%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Name:</font></p>    </td>
<td width="40%" valign="top" style="padding:0in 0in 0in 0in;width:40.0%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">James J.   Moore,&nbsp;Jr.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Title:</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">President and Chief   Executive Officer</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
<td width="4%" valign="top" style="padding:0in 0in 0in 0in;width:4.16%;">
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Date: July&nbsp;6, 2016</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>   </tr>  </table>
<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">&nbsp;</font></p>
<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">6<a name="PB_6_233239_1567"></a></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="2" face="Times New Roman" style="font-size:10.0pt;font-weight:bold;">INDEX TO EXHIBITS</font></b></p>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:1.0pt;font-weight:bold;">&nbsp;</font></b></p>    </td>
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<p align="center" style="margin:0in 0in .0001pt;text-align:center;"><b><font size="1" face="Times New Roman" style="font-size:8.0pt;font-weight:bold;">Description</font></b></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)(1)(i)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Offer to Purchase and Issuer Bid Circular, dated   June&nbsp;16, 2016.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)(1)(ii)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Letter of Transmittal, dated June&nbsp;16, 2016.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(a)(5)(i)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Press Release, dated June&nbsp;16, 2016   (incorporated by reference to the pre-commencement communication of the   Company on Schedule TO, filed with the SEC on June&nbsp;16, 2016).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(b)</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Not applicable.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(1)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Agreement between the Company and Polar   Multi-Strategy Master Fund, dated June&nbsp;16, 2016, to tender an aggregate   of approximately US$15,000,000 principal amount of Debentures pursuant to the   Offer.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(2)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Agreement between the Company, Twin Lake Total   Return Partners QP L.P., Twin Lake Total Return Partners L.P.,&nbsp;Iron Road   Multi Strategy Fund, L.P. and Iron Road Diversified Fund, L.P., dated June&nbsp;16,   2016, to tender an aggregate of approximately US$14,661,000 principal amount   of Debentures pursuant to the Offer.</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(3)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Trust Indenture Providing for the Issue of   Convertible Unsecured Subordinated Debentures, dated as of December&nbsp;17,   2009, between Atlantic Power Corporation and Computershare Trust Company of   Canada (incorporated by reference to the Company&#146;s registration statement on   Form&nbsp;10-12B filed on April&nbsp;13, 2010).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(4)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Second Supplemental Indenture to the Trust Indenture   Providing for the Issue of Convertible Unsecured Subordinated Debentures,   dated as of July&nbsp;5, 2012, between Atlantic Power Corporation and   Computershare Trust Company of Canada (incorporated by reference to the   Company&#146;s Current Report on Form&nbsp;8-K filed on July&nbsp;6, 2012).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(5)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Sixth Supplemental Indenture to the Trust Indenture   Providing for the Issue of Convertible Unsecured Subordinated Debentures,   dated as of March&nbsp;22, 2013, between Atlantic Power Corporation and   Computershare Trust Company of Canada (incorporated by reference to the   Company&#146;s Current Report on Form&nbsp;8-K filed on March&nbsp;26, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(6)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Trust Indenture, dated as of October&nbsp;11, 2006   between Atlantic Power Corporation and Computershare Trust Company of Canada   (incorporated by reference to the Company&#146;s registration statement on   Form&nbsp;10-12B filed on April&nbsp;13, 2010).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(7)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">First Supplemental Indenture to the Trust Indenture   Providing for the Issue of Convertible Secured Debentures, dated   November&nbsp;27, 2009, between Atlantic Power Corporation and Computershare   Trust Company of Canada (incorporated by reference to the Company&#146;s   registration statement on Form&nbsp;10-12B filed on April&nbsp;13,   2010).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(8)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fourth Supplemental Indenture, dated as of   August&nbsp;3, 2012, by and among Atlantic Rockland Holdings,&nbsp;LLC,   Atlantic Power Corporation, the Guarantors named therein and Wilmington   Trust, National Association (incorporated by reference to our Annual Report   on Form&nbsp;10-K filed on March&nbsp;1, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(9)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fifth Supplemental Indenture, dated as of November&nbsp;29,   2012, by and among Atlantic Ridgeline Holdings,&nbsp;LLC, Atlantic Power   Corporation, the Guarantors named therein and Wilmington Trust, National   Association (incorporated by reference to the Company&#146;s Annual Report on   Form&nbsp;10-K filed on March&nbsp;1, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(10)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Shareholder Rights Plan Agreement, dated effective   as of February&nbsp;28, 2013, between Atlantic Power Corporation and   Computershare Investor Services,&nbsp;Inc., which includes the Form&nbsp;of   Right Certificate as Exhibit&nbsp;A (incorporated by reference to the   Company&#146;s Current</font></p>    </td>   </tr>  </table>
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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">7<a name="PB_7_233309_7056"></a></p>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Report on Form&nbsp;8-K filed on February&nbsp;28,   2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(11)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Deferred Share Unit Plan, dated as of April&nbsp;24,   2007 of Atlantic Power Corporation (incorporated by reference to the   Company&#146;s registration statement on Form&nbsp;10-12B filed on   April&nbsp;13, 2010).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(12)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Fifth Amended and Restated Long-Term Incentive   Plan (incorporated by reference to the Company&#146;s Current Report on   Form&nbsp;8-K filed on April&nbsp;11, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(13)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Amendment No.&nbsp;1 to the Fifth Amended and   Restated Long-Term Incentive Plan of the Company (incorporated by   reference to Exhibit&nbsp;A to Schedule&nbsp;B of the Company&#146;s definitive   Proxy Statement on Schedule&nbsp;14A filed on April&nbsp;30, 2014).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(14)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Participation Agreement and Confirmation   (performance-based vesting) between the Company and Terrence Ronan,   dated April&nbsp;11, 2013 (incorporated by reference to the Company&#146;s   Quarterly Report on Form&nbsp;10-Q filed on August&nbsp;8, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(15)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Participation Agreement and Confirmation   (time-vesting) between the Company and Terrence Ronan, dated   April&nbsp;11, 2013 (incorporated by reference to the Company&#146;s Quarterly   Report on Form&nbsp;10-Q filed on August&nbsp;8, 2013).</font></p>    </td>   </tr>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">(d)(16)&#134;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:1.0pt;">&nbsp;</font></p>    </td>
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<p style="margin:0in 0in .0001pt;"><font size="2" face="Times New Roman" style="font-size:10.0pt;">Transition Equity Grant Participation Agreement between   Atlantic Power Services,&nbsp;LLC and James J. Moore,&nbsp;Jr., dated   January&nbsp;22, 2015 (incorporated by reference to the Company&#146;s Current   Report on Form&nbsp;8-K filed on January&nbsp;23, 2015).</font></p>    </td>   </tr>  </table>
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<p style="font-size:10.0pt;margin:0in 0in .0001pt;"><font size="2" face="Times New Roman"><font style="font-size:10.0pt;">&#134;</font>&#160; </font>Previously filed as an exhibit to the Schedule TO filed on June&nbsp;17, 2016.</p>
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<p align="center" style="font-size:10.0pt;margin:0in 0in .0001pt;text-align:center;">8<a name="PB_8_233314_5335"></a></p>
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