<SUBMISSION>
<ACCESSION-NUMBER>0001140361-21-021413
<TYPE>6-K
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20210616
<FILING-DATE>20210617
<DATE-OF-FILING-DATE-CHANGE>20210617
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>Atlantica Sustainable Infrastructure plc
<CIK>0001601072
<ASSIGNED-SIC>4911
<IRS-NUMBER>000000000
<STATE-OF-INCORPORATION>X0
<FISCAL-YEAR-END>1231
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<FILING-VALUES>
<FORM-TYPE>6-K
<ACT>34
<FILE-NUMBER>001-36487
<FILM-NUMBER>211024735
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>GREAT WEST HOUSE, GW1, 17TH FLOOR
<STREET2>GREAT WEST ROAD
<CITY>BRENTFORD
<STATE>X0
<ZIP>TW8 9DF
<PHONE>44 20 7098 4384
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<MAIL-ADDRESS>
<STREET1>GREAT WEST HOUSE, GW1, 17TH FLOOR
<STREET2>GREAT WEST ROAD
<CITY>BRENTFORD
<STATE>X0
<ZIP>TW8 9DF
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Atlantica Yield plc
<DATE-CHANGED>20160513
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Abengoa Yield plc
<DATE-CHANGED>20140326
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<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Abengoa Yield Ltd
<DATE-CHANGED>20140226
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<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>brhc10025919_6k.htm
<DESCRIPTION>6-K
<TEXT>
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    <div style="text-align: center; margin-right: 0.1pt; margin-left: 0.1pt; font-size: 14pt; font-weight: bold;">UNITED STATES</div>
    <div style="text-align: center; margin-right: 0.1pt; margin-left: 0.1pt; font-size: 14pt; font-weight: bold;">SECURITIES AND EXCHANGE COMMISSION</div>
    <div style="text-align: center; margin-right: 0.1pt; margin-left: 0.1pt; font-size: 12pt; font-weight: bold;">Washington, D.C. 20549</div>
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    <div style="text-align: center; margin-right: 0.1pt; margin-left: 0.1pt; font-size: 18pt;">FORM 6-K</div>
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    <div style="text-align: center; font-weight: bold;">&#160;REPORT OF FOREIGN PRIVATE ISSUER</div>
    <div style="text-align: center; font-weight: bold;">PURSUANT TO RULE 13a-16 OR 15d-16</div>
    <div style="text-align: center; font-weight: bold;">UNDER THE SECURITIES EXCHANGE ACT OF 1934</div>
    <div><br>
    </div>
    <div style="text-align: center; font-weight: bold;">For the month of June, 2021</div>
    <div><br>
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    <div style="text-align: center; font-weight: bold;">Commission File Number 001-36487</div>
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    <div style="text-align: center; margin-right: 0.1pt; margin-left: 0.1pt; font-size: 24pt; font-weight: bold;">Atlantica Sustainable Infrastructure plc</div>
    <div style="text-align: center; font-style: italic;">(Exact name of Registrant as Specified in its Charter)</div>
    <div><br>
    </div>
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    <br>
    <div style="text-align: center; font-weight: bold;">Not Applicable</div>
    <div style="text-align: center;">(Translation of Registrant&#8217;s name into English)</div>
    <br>
    <hr noshade="noshade" align="center" style="background-color: #000000; border-bottom: medium none; border-left: medium none; border-right: medium none; border-top: medium none; margin: 0px auto; height: 2px; width: 10%; color: #000000; text-align: center;"><br>
    <div style="text-align: center; font-weight: bold;">Great West House, GW1, 17th floor</div>
    <div style="text-align: center; font-weight: bold;">Great West Road</div>
    <div style="text-align: center; font-weight: bold;">Brentford, TW8 9DF</div>
    <div style="text-align: center; font-weight: bold;">United Kingdom</div>
    <div style="text-align: center; font-weight: bold;">Tel.: +44 203 499 0465</div>
    <div style="text-align: center; font-weight: bold;"> <br>
    </div>
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    <br>
    <div style="text-indent: 36pt;">Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:</div>
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            <div style="text-align: right;">&#9746;&#160; Form 20-F</div>
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          <td style="width: 4%; vertical-align: middle; text-align: center;">&#160;</td>
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            <div>&#9744;&#160; Form 40-F</div>
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    <div style="text-indent: 36pt;">Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):&#160; &#9744;</div>
    <div><br>
    </div>
    <div style="text-indent: 36pt;">Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):&#160; &#9744;</div>
    <div><br>
    </div>
    <div style="text-indent: 36pt; color: rgb(0, 0, 0);">This Report on Form 6-K is incorporated by reference into&#160; the Registration Statement on Form F-3 of the Registrant filed
      with the Securities and Exchange Commission on August 6, 2018 (File 333-226611).</div>
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    <div style="text-align: justify;">June 17, 2021 &#8211; On June 16, 2021 Atlantica Sustainable Infrastructure plc closed the previously announced acquisition of the 49% equity interest in a 596 MW
      wind portfolio in the US.</div>
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              <div style="text-align: justify; color: rgb(0, 0, 0); font-weight: bold;">Chief Financial Officer</div>
              <div style="text-align: justify; color: rgb(0, 0, 0);">Francisco Martinez-Davis</div>
              <div style="text-align: justify; color: rgb(0, 0, 0);"><font style="font-weight: bold;">E </font>ir@atlantica.com</div>
              <div>&#160;</div>
            </td>
            <td style="width: 50%; vertical-align: top;">
              <div style="text-align: justify; color: rgb(0, 0, 0); font-weight: bold;">Investor Relations &amp; Communication</div>
              <div style="text-align: justify; color: rgb(0, 0, 0);">Leire Perez</div>
              <div style="text-align: justify; color: rgb(0, 0, 0);"><font style="font-weight: bold;">E </font>ir@atlantica.com</div>
              <div style="text-align: justify; color: rgb(0, 0, 0);"><font style="font-weight: bold;">T</font>&#160; +44 20 3499 0465</div>
            </td>
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    <div style="text-align: center; font-weight: bold;">SIGNATURES</div>
    <div>&#160;</div>
    <div>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,
      thereunto duly authorized.</div>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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            <div>ATLANTICA SUSTAINABLE INFRASTRUCTURE PLC</div>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
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          <td style="width: 50%; vertical-align: top; padding-bottom: 2px;">&#160;</td>
          <td style="width: 50%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">
            <div>
              <div>/s/ Santiago Seage</div>
            </div>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 50%; vertical-align: top;">
            <div>Name: Santiago Seage</div>
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          <td style="width: 50%; vertical-align: top;">&#160;</td>
          <td style="width: 50%; vertical-align: top;">
            <div>Title:&#160;&#160; Chief Executive Officer</div>
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    <div>&#160;</div>
    <div>Date: June 17, 2021</div>
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