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      <div style="text-align: center;"> <font style="font-weight: bold;">As filed with the Securities and Exchange Commission on January 29, 2021</font><br>
      </div>
      <div style="font-weight: bold;">Registration No. 333- ________</div>
      <div>&#160;</div>
    </div>
    <div>
      <div style="text-align: center; font-size: 14pt; font-weight: bold;">
        <div>
          <hr align="center" style="border: none; border-bottom: 1px solid black; border-top: 4px solid black; height: 10px; color: #ffffff; background-color: #ffffff; margin-left: auto; margin-right: auto;">&#160;</div>
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      <div style="text-align: center; font-size: 14pt; font-weight: bold;">UNITED STATES</div>
      <div style="text-align: center; font-size: 14pt; font-weight: bold;">SECURITIES AND EXCHANGE COMMISSION</div>
      <div style="text-align: center; font-size: 12pt; font-weight: bold;">Washington, D.C. 20549</div>
      <div style="font-weight: 400;"> <br>
      </div>
      <div style="text-align: center; font-weight: bold;">
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; margin-left: auto; margin-right: auto; border: none;"></div>
      <div>&#160;</div>
      <div style="text-align: center; font-size: 18pt; font-weight: bold;">FORM S-8</div>
      <div style="text-align: center; font-weight: bold;">REGISTRATION STATEMENT</div>
      <div style="text-align: center; font-style: italic; font-weight: bold;">UNDER</div>
      <div style="text-align: center; font-style: italic; font-weight: bold;">THE SECURITIES ACT OF 1933</div>
      <div style="text-align: center; font-style: italic; font-weight: bold;"> <br>
      </div>
      <div style="text-align: center; font-style: italic; font-weight: bold;">
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; margin-left: auto; margin-right: auto; border: none;"></div>
      <div style="font-weight: 400;"> <br>
      </div>
      <div style="text-align: center; font-size: 24pt; font-weight: bold;">Atkore International Group Inc.</div>
      <div style="text-align: center; font-weight: bold;">(Exact name of registrant as specified in its charter)</div>
      <div style="text-align: center; font-weight: bold;"> <br>
      </div>
      <div style="text-align: center; font-weight: bold;">
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; margin-left: auto; margin-right: auto; border: none;"> </div>
      <div> <br>
      </div>
      <table cellspacing="0" cellpadding="0" border="0" id="z5e57de4eeb314d1ab1b611589fe9d38e" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; border-collapse: collapse; text-align: left; color: #000000;">

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            <td style="width: 49%; vertical-align: top;">
              <div style="text-align: center; font-weight: bold;">Delaware</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 49%; vertical-align: top;">
              <div style="text-align: center; font-weight: bold;">90-0631463</div>
            </td>
          </tr>
          <tr>
            <td style="width: 49%; vertical-align: top;">
              <div style="text-align: center; font-weight: bold;">(State or other jurisdiction of incorporation or organization)</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 49%; vertical-align: top;">
              <div style="text-align: center; font-weight: bold;">(I.R.S. Employer Identification Number)</div>
            </td>
          </tr>

      </table>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">16100 South Lathrop Avenue,</div>
      <div style="text-align: center; font-weight: bold;">Harvey, IL 60426</div>
      <div style="text-align: center; font-weight: bold;">(708) 339-1610</div>
      <div style="text-align: center; font-weight: bold;">(Address, including Zip Code, and Telephone Number, including Area Code of Registrant&#8217;s Principal Executive Office)</div>
      <div style="text-align: center; font-weight: bold;"> <br>
      </div>
      <div>
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; text-align: center; margin-left: auto; margin-right: auto; border: none;"></div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">ATKORE INTERNATIONAL GROUP INC. 2020 OMNIBUS INCENTIVE PLAN</div>
      <div style="text-align: center; font-weight: bold;">(Full title of the plan)</div>
      <div> <br>
      </div>
      <div>
        <div style="text-align: center;">
          <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; margin-left: auto; margin-right: auto; border: none;"></div>
      </div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">Daniel S. Kelly, Esq.</div>
      <div style="text-align: center; font-weight: bold;">Vice President - General Counsel and Secretary</div>
      <div style="text-align: center; font-weight: bold;">Atkore International Group Inc.</div>
      <div style="text-align: center; font-weight: bold;">16100 South Lathrop Avenue</div>
      <div style="text-align: center; font-weight: bold;">Harvey, Illinois 60426</div>
      <div style="text-align: center; font-weight: bold;">(708) 339-1610</div>
      <div style="text-align: center; font-weight: bold;">(Name, address and telephone number of agent for service)</div>
      <div style="text-align: center; font-weight: bold;"> <br>
      </div>
      <div>
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; text-align: center; margin-left: auto; margin-right: auto; border: none;"></div>
      <br>
      <div style="text-align: center; font-style: italic; font-weight: bold;">With a copy to:</div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">Paul M. Rodel, Esq.</div>
      <div style="text-align: center; font-weight: bold;">Debevoise &amp; Plimpton LLP</div>
      <div style="text-align: center; font-weight: bold;">919 Third Avenue</div>
      <div style="text-align: center; font-weight: bold;">New York, New York 10022</div>
      <div style="text-align: center; font-weight: bold;">(212) 909-6000</div>
      <div style="text-align: center; font-weight: bold;"> <br>
      </div>
      <div>
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; text-align: center; margin-left: auto; margin-right: auto; border: none;"></div>
      <div>&#160;</div>
      <div>Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer&#8221; and &#8220;smaller
        reporting company&#8221; in Rule 12b-2 of the Exchange Act.</div>
      <div> <br>
      </div>
      <table cellspacing="0" cellpadding="0" border="0" align="center" id="z03d8a44540434963b6fc27d86c566d2a" style="border-collapse: collapse; width: 90%; color: #000000; font-family: 'Times New Roman'; font-size: 10pt; text-align: left;">

          <tr>
            <td style="width: 21%; vertical-align: bottom;">
              <div>Large accelerated filer</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 40%; vertical-align: bottom;">
              <div>&#9746;</div>
            </td>
            <td style="width: 1%; vertical-align: bottom;">&#160;</td>
            <td style="width: 21%; vertical-align: bottom;">
              <div>Accelerated filer</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2.82%; vertical-align: bottom;">
              <div>&#9744;</div>
            </td>
          </tr>
          <tr>
            <td style="width: 21%; vertical-align: middle;">&#160;</td>
            <td style="vertical-align: middle;" colspan="2">&#160;</td>
            <td style="vertical-align: middle;" colspan="2">&#160;</td>
            <td style="vertical-align: middle;" colspan="2">&#160;</td>
          </tr>
          <tr>
            <td style="width: 21%; vertical-align: bottom;">
              <div>Non-accelerated filer</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 40%; vertical-align: bottom;">
              <div>&#9744;</div>
            </td>
            <td style="width: 1%; vertical-align: bottom;">&#160;</td>
            <td style="width: 21%; vertical-align: bottom;">
              <div>Smaller reporting company</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2.82%; vertical-align: bottom;">
              <div>&#9744;</div>
            </td>
          </tr>
          <tr>
            <td style="width: 21%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 40%; vertical-align: bottom;">&#160;</td>
            <td style="width: 1%; vertical-align: bottom;">&#160;</td>
            <td style="width: 21%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2.82%; vertical-align: bottom;">&#160;</td>
          </tr>
          <tr>
            <td style="width: 21%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 40%; vertical-align: bottom;">&#160;</td>
            <td style="width: 1%; vertical-align: bottom;">&#160;</td>
            <td style="width: 21%; vertical-align: bottom;">
              <div>Emerging Growth Company</div>
            </td>
            <td style="width: 2%; vertical-align: bottom;">&#160;</td>
            <td style="width: 2.82%; vertical-align: bottom;">
              <div>&#9744;</div>
            </td>
          </tr>

      </table>
      <div> <br>
      </div>
      <div>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 7(a)(2)(B) of the
        Securities Act. &#9744;</div>
      <div> <br>
      </div>
      <div>
        <hr align="center" style="border: none; border-bottom: 4px solid black; border-top: 1px solid black; height: 10px; color: #ffffff; background-color: #ffffff; text-align: center; margin-left: auto; margin-right: auto;"></div>
      <div style="clear: both; margin-top: 10pt; margin-bottom: 10pt;" id="DSPFPageBreakArea">
        <div style="page-break-after: always;" id="DSPFPageBreak">
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      </div>
      <div style="text-align: center; font-weight: bold;">CALCULATION OF REGISTRATION FEE</div>
      <div> <br>
      </div>
      <table cellspacing="0" cellpadding="0" border="0" id="zea4e3fcd533b453bbf4a216184a950a7" style="font-family: 'Times New Roman'; font-size: 10pt; text-align: left; color: #000000; width: 100%;">

          <tr>
            <td valign="bottom" nowrap="nowrap" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-left: #000000 solid 2px; border-top: #000000 solid 2px;">
              <div style="text-align: center; font-weight: bold;">Title of Securities</div>
              <div style="text-align: center; font-weight: bold;">to be registered</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-left: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="2" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">
              <div style="text-align: center; font-weight: bold;">Amount</div>
              <div style="text-align: center; font-weight: bold;">to be</div>
              <div style="text-align: center; font-weight: bold;">registered(1)</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-left: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="2" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">
              <div style="text-align: center; font-weight: bold;">Proposed</div>
              <div style="text-align: center; font-weight: bold;">maximum</div>
              <div style="text-align: center; font-weight: bold;">offering price</div>
              <div style="text-align: center; font-weight: bold;">per share</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-left: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="2" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">
              <div style="text-align: center; font-weight: bold;">Proposed</div>
              <div style="text-align: center; font-weight: bold;">maximum</div>
              <div style="text-align: center; font-weight: bold;">aggregate</div>
              <div style="text-align: center; font-weight: bold;">offering price</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-left: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="2" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-top: #000000 solid 2px;">
              <div style="text-align: center; font-weight: bold;">Amount of</div>
              <div style="text-align: center; font-weight: bold;">registration fee</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; border-bottom: #000000 solid 2px; border-right: #000000 solid 2px; border-top: #000000 solid 2px;">&#160;</td>
          </tr>
          <tr>
            <td valign="bottom" style="vertical-align: bottom; width: 52%; border-left: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">
              <div style="text-align: center;">Common Stock, par value</div>
              <div style="text-align: center;"> $0.01 per share</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-left: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; text-align: right; width: 9%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>2,616,828</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-left: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>$</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; text-align: right; width: 9%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>44.36</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">
              <div>(2)</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-left: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>$</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; text-align: right; width: 9%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>116,082,490</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-left: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>$</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; text-align: right; width: 9%; border-bottom: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255);">
              <div>12,664.60</div>
            </td>
            <td valign="bottom" nowrap="nowrap" colspan="1" style="vertical-align: bottom; width: 1%; border-right: 2px solid rgb(0, 0, 0); background-color: rgb(204, 238, 255); border-bottom: 2px solid rgb(0, 0, 0);">&#160;</td>
          </tr>

      </table>
      <div><br>
      </div>
      <div>
        <table cellspacing="0" cellpadding="0" id="z9004caaed61c4c77aecf7ffb1b0c1a01" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 18pt; vertical-align: top;">(1)</td>
              <td style="vertical-align: top;">
                <div>The number of shares being registered represents shares reserved for issuance pursuant to future awards under the Atkore International Group Inc. 2020 Omnibus Incentive Plan (the &#8220;Omnibus Incentive Plan&#8221;). Pursuant to Rule 416(a) of
                  the Securities Act of 1933, as amended, this Registration Statement shall also cover any additional shares of the Registrant&#8217;s Common Stock that become issuable under the Omnibus Incentive Plan by reason of any stock dividend, stock
                  split, recapitalization or other similar transaction.</div>
              </td>
            </tr>

        </table>
        <table cellspacing="0" cellpadding="0" id="zf38f9fff4e1a41fc9cb66d62514aadf9" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 18pt; vertical-align: top;">(2)</td>
              <td style="width: auto; vertical-align: top;">
                <div>Computed pursuant to Rule 457(h) solely for purpose of determining the registration fee, based upon an assumed price of $44.36 per share of the Registrant&#8217;s Common Stock, which is based on the average of the high sales price and low
                  sales price per share of the Registrant&#8217;s Common Stock as reported on the New York Stock Exchange on January 27, 2021.</div>
              </td>
            </tr>

        </table>
      </div>
      <div><br>
      </div>
      <div style="clear: both; margin-top: 10pt; margin-bottom: 10pt;" id="DSPFPageBreakArea">
        <div style="page-break-after: always;" id="DSPFPageBreak">
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      </div>
      <div style="text-align: center; font-weight: bold;">Part I</div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">Information Required in the Section 10(a) Prospectus</div>
      <div>&#160;</div>
      <div>All information required by Part I to be contained in the prospectus is omitted from this Registration Statement in accordance with Rule 428 under the Securities Act of 1933, as amended (the &#8220;<u>Securities Act&#8221;</u>).</div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">Part II</div>
      <div>&#160;</div>
      <div style="text-align: center; font-weight: bold;">Information Required in the Registration Statement</div>
      <div> <br>
      </div>
      <table cellspacing="0" cellpadding="0" id="z96f888096538447bb035295bb7c6f946" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

          <tr>
            <td style="width: 45pt; vertical-align: top; font-weight: bold;">Item 3.</td>
            <td style="width: auto; vertical-align: top;">
              <div style="font-weight: bold;">Incorporation of Certain Documents by Reference.</div>
            </td>
          </tr>

      </table>
      <div>&#160;</div>
      <div>The Securities and Exchange Commission (the &#8220;<u>Commission</u>&#8221;) allows Atkore International Group Inc. (&#8220;<u>us</u>&#8221;, &#8220;<u>we</u>&#8221; or the &#8220;<u>Company</u>&#8221;) to &#8220;incorporate by reference&#8221; into this Registration Statement information we file with
        the Commission in other documents. This means that we can disclose important information to you by referring to another document we filed with the Commission.</div>
      <div>&#160;</div>
      <div>We incorporate by reference, as of their respective dates of filing, the documents listed below (excluding any portions of such documents that have been &#8220;furnished&#8221; but not &#8220;filed&#8221; for purposes of the Securities Exchange Act of 1934, as amended
        (the &#8220;<u>Exchange Act</u>&#8221;)):</div>
      <div> <br>
        <table cellspacing="0" cellpadding="0" id="za51bd8c1d2e54ff5a8396733306d2660" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 27pt;">&#160;</td>
              <td style="width: 18pt; vertical-align: top;">(a)</td>
              <td style="width: auto; vertical-align: top;">
                <div>the Company&#8217;s Annual Report for the fiscal year ended <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1666138/000166613820000123/atkr2020annualreport.htm">September 30, 2020</a> as filed with the Commission on November 19,
                  2020 (File No. 001-37793);</div>
              </td>
            </tr>

        </table>
        <div style="text-indent: -36pt; margin-left: 36pt;"><font style="font-size: 8pt;"> </font><br>
        </div>
        <div><font style="font-size: 8pt;"> </font>
          <table cellspacing="0" cellpadding="0" id="z84eb3c262c6d4719a86d9f6d08ae2574" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">(b)</td>
                <td style="width: auto; vertical-align: top;">
                  <div>the Company&#8217;s Current Reports on Form 8-K filed with the Commission on <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1666138/000166613820000121/atkr-20201119.htm">November 19, 2020</a><font style="color: #000000;">&#160;</font>and



                    <a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1666138/000166613820000172/atkr-20201203.htm">December 3, 2020</a>, in each case <font style="color: #000000;">with respect to Item 9.01 only </font>(File Nos. 001-37793); and</div>
                </td>
              </tr>

          </table>
          <div><br>
          </div>
        </div>
        <div><font style="font-size: 8pt;"> </font>
          <table cellspacing="0" cellpadding="0" id="z58370a568f69438086a97fb3e837c830" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">(c)</td>
                <td style="width: auto; vertical-align: top;">
                  <div><font style="color: #000000;">the portions of the Registrant&#8217;s </font>Proxy Statement<font style="color: #000000;"> on Schedule 14A, filed with the Commission on <a href="https://www.sec.gov/Archives/edgar/data/1666138/000166613820000178/atkore-def14a2021.htm">December 11, 2020</a> (File No. </font>001-37793<font style="color: #000000;">), that are incorporated by reference into the
                      Registrant&#8217;s Annual Report referred to above.</font></div>
                </td>
              </tr>

          </table>
        </div>
        <br>
        <div>All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement that
          indicate that all securities offered hereby have been sold or that deregister all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the respective dates
          of filing of such documents.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z7cc8065916104201919cfa09c752da60" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; align: right; font-weight: bold;">Item 4.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Description of Securities.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>Not applicable.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z597f8fa225f34fdea3b3a932f3c3be3f" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; align: right; font-weight: bold;">Item 5.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Interests of Named Experts and Counsel.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>Not applicable.</div>
        <div>&#160;</div>
        <table cellspacing="0" cellpadding="0" id="zf0903c2b2abb4021a454122405973179" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; font-weight: bold;">Item 6.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Indemnification of Directors and Officers.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div style="font-style: italic; font-weight: bold;">Delaware General Corporation Law</div>
        <div>&#160;</div>
        <div>Atkore International Group Inc. is incorporated under the laws of the state of Delaware.</div>
        <div>&#160;</div>
        <div>Section 145(a) of the General Corporation Law of the State of Delaware (the &#8220;<u>DGCL</u>&#8221;) provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed
          action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the
          corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys&#8217; fees), judgments,
          fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the
          best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person&#8217;s conduct was unlawful.</div>
        <div> <br>
        </div>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        <div>Section 145(b) of the DGCL provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a
          judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another
          corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys&#8217; fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if the person
          acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which such person
          shall have been adjudged to be liable to the corporation unless and only to the extent that the Delaware Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of
          liability but in view of all of the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Delaware Court of Chancery or such other court shall deem proper.</div>
        <div>&#160;</div>
        <div>Section 145(c) of the DGCL provides that to the extent that a present or former director or officer of a corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in subsections (a) and
          (b) of Section 145 of the DGCL, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys&#8217; fees) actually and reasonably incurred by such person in connection therewith.</div>
        <div>&#160;</div>
        <div>Section 145(e) of the DGCL provides that expenses (including attorneys&#8217; fees) incurred by an officer or director of the corporation in defending any civil, criminal, administrative or investigative action, suit or proceeding may be paid by the
          corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that such person is not
          entitled to be indemnified by the corporation as authorized in Section 145 of the DGCL.</div>
        <div><br>
        </div>
        <div>Such expenses (including attorneys&#8217; fees) incurred by former directors and officers or other employees and agents of the corporation or by persons serving at the request of the corporation as directors, officers, employees or agents of another
          corporation, partnership, joint venture, trust or other enterprise may be so paid upon such terms and conditions, if any, as the corporation deems appropriate.</div>
        <div>&#160;</div>
        <div>Section 145(g) of the DGCL specifically allows a Delaware corporation to purchase liability insurance on behalf of its directors and officers and to insure against potential liability of such directors and officers regardless of whether the
          corporation would have the power to indemnify such directors and officers under Section 145 of the DGCL.</div>
        <div>&#160;</div>
        <div>Our Third Amended and Restated Certificate of Incorporation contains provisions permitted under the DGCL relating to the liability of directors.&#160; These provisions eliminate a director&#8217;s personal liability for monetary damages resulting from a
          breach of fiduciary duty, except in circumstances involving:</div>
        <div> <br>
          <table cellspacing="0" cellpadding="0" id="z95eb8592f3fb4680821d9d4dea4386fe" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">&#8226;</td>
                <td style="width: auto; vertical-align: top;">
                  <div> any breach of the director&#8217;s duty of loyalty;</div>
                </td>
              </tr>

          </table>
          <div style="text-indent: -36pt; margin-left: 36pt;"><font style="font-size: 8pt;"> </font><br>
          </div>
          <table cellspacing="0" cellpadding="0" id="z3067d52b6f574b538335fdc0e0a3dfcc" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">&#8226;</td>
                <td style="width: auto; vertical-align: top;">
                  <div> acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of the law;</div>
                </td>
              </tr>

          </table>
          <div style="text-indent: -36pt; margin-left: 36pt;"><font style="font-size: 8pt;"> </font><br>
          </div>
          <table cellspacing="0" cellpadding="0" id="zd83507e18cac4ec995f23bb24c119f45" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">&#8226;</td>
                <td style="width: auto; vertical-align: top;">
                  <div> Section 174 of the DGCL (unlawful dividends); or</div>
                </td>
              </tr>

          </table>
          <div style="text-indent: -36pt; margin-left: 36pt;"><font style="font-size: 8pt;"> </font><br>
          </div>
          <table cellspacing="0" cellpadding="0" id="z7f54e933e17b4b0a87e373da74336701" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

              <tr>
                <td style="width: 27pt;">&#160;</td>
                <td style="width: 18pt; vertical-align: top;">&#8226;</td>
                <td style="width: auto; vertical-align: top;">
                  <div> any transaction from which the director derives an improper personal benefit.</div>
                </td>
              </tr>

          </table>
        </div>
      </div>
      <div><br>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        Our Third Amended and Restated Certificate of Incorporation and our Third Amended and Restated By-laws require us to indemnify and advance expenses to our directors and officers to the fullest extent not prohibited by the DGCL and other applicable
        law, except in the case of a proceeding instituted by the director without the approval of our board of directors.&#160; Our Third Amended and Restated Certificate of Incorporation and our Third Amended and Restated By-laws provide that we are required
        to indemnify our directors and executive officers, to the fullest extent permitted by law, for all judgments, fines, settlements, legal fees and other expenses incurred in connection with pending or threatened legal proceedings because of the
        director&#8217;s or officer&#8217;s positions with us or another entity that the director or officer serves at our request, subject to various conditions, and to advance funds to our directors and officers to enable them to defend against such proceedings.&#160; To
        receive indemnification, the director or officer must have been successful in the legal proceeding or have acted in good faith and in what was reasonably believed to be a lawful manner in our best interest and, with respect to any criminal
        proceeding, have had no reasonable cause to believe his or her conduct was unlawful.
        <div>&#160;</div>
        <div>Section 102(b)(7) of the DGCL permits a Delaware corporation to include a provision in its certificate of incorporation eliminating or limiting the personal liability of directors to the corporation or its stockholders for monetary damages for
          breach of fiduciary duty as a director.&#160; This provision, however, may not eliminate or limit a director&#8217;s liability (1) for breach of the director&#8217;s duty of loyalty to the corporation or its stockholders, (2) for acts or omissions not in good
          faith or involving intentional misconduct or a knowing violation of law, (3) under Section 174 of the DGCL, which provides for liability of directors for unlawful payments of dividends or unlawful stock purchases or redemptions, or (4) for any
          transaction from which the director derived an improper personal benefit. Our Third Amended and Restated Certificate of Incorporation contains such a provision.</div>
        <div>&#160;</div>
        <div style="font-style: italic; font-weight: bold;">Indemnification Agreements</div>
        <div>&#160;</div>
        <div>We have entered into indemnification agreements with our directors. The indemnification agreements provide the directors with contractual rights to the indemnification and expense advancement rights provided under our Third Amended and
          Restated By-laws, as well as contractual rights to additional indemnification as provided in the indemnification agreements.</div>
        <div>&#160;&#160; </div>
        <div style="font-style: italic; font-weight: bold;">Directors&#8217; and Officers&#8217; Liability Insurance</div>
        <div>&#160;</div>
        <div>We have obtained directors&#8217; and officers&#8217; liability insurance which insures against certain liabilities that our directors and officers and the directors and officers of our subsidiaries may, in such capacities, incur.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z8360f0258ba34f16959cf3de762d6c77" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; font-weight: bold;">Item 7.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Exemption from Registration Claimed.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>Not applicable.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z1517566f7ec348eaa80f3d0b30816a46" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; font-weight: bold;">Item 8.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Exhibits.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>The Exhibits accompanying this Registration Statement are listed on the accompanying Exhibit Index.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z50779a8c9a7e4f6f99c13c6e0648a529" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 45pt; vertical-align: top; align: right; font-weight: bold;">Item 9.</td>
              <td style="width: auto; vertical-align: top;">
                <div style="font-weight: bold;">Undertakings.</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>(a) The undersigned registrant hereby undertakes:</div>
        <div>&#160;</div>
        <div>(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:</div>
        <div>&#160;</div>
        <div>(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;</div>
        <div>&#160;</div>
        <div>(ii) To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change
          in the information set forth in this Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and
          any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more
          than a 20 percent change in the maximum aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221; table in the effective Registration Statement; and</div>
        <div> <br>
        </div>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        <div>(iii) To include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement; <font style="font-style: italic;">provided, however</font>, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the
          Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act, that are incorporated by reference in this Registration Statement.</div>
        <div>&#160;</div>
        <div>(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such
          securities at that time shall be deemed to be the initial bona fide offering thereof.</div>
        <div>&#160;</div>
        <div>(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.</div>
        <div>&#160;</div>
        <div>(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant&#8217;s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where
          applicable, each filing of an employee benefit plan&#8217;s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the
          securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</div>
        <div>&#160;</div>
        <div>(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been
          advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than
          the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in
          connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such
          indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</div>
        <div>&#160;</div>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        <div style="text-align: center; font-weight: bold;">SIGNATURES</div>
        <div>&#160;</div>
        <div>Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be
          signed on its behalf by the undersigned, thereunto duly authorized, in the City of Harvey, Illinois on January 29, 2021.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" border="0" id="z56eb2b12e7964b2faa9698b8619fc6cc" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; border-collapse: collapse; text-align: left; color: #000000;">

            <tr>
              <td style="width: 59.94%; vertical-align: top;">&#160;</td>
              <td style="vertical-align: top;" colspan="3">
                <div>Atkore International Group Inc.</div>
              </td>
            </tr>
            <tr>
              <td style="width: 59.94%; vertical-align: top;">&#160;</td>
              <td style="width: 3%; vertical-align: middle;">&#160;</td>
              <td style="vertical-align: middle;" colspan="2">&#160;</td>
            </tr>
            <tr>
              <td style="width: 59.94%; vertical-align: top;">&#160;</td>
              <td style="width: 3%; vertical-align: top;">
                <div>By:</div>
              </td>
              <td style="vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);" colspan="2">
                <div>
                  <div>/s/ Daniel S. Kelly</div>
                </div>
              </td>
            </tr>
            <tr>
              <td style="width: 59.94%; vertical-align: top;" rowspan="1">&#160;</td>
              <td style="width: 3%; vertical-align: top;" rowspan="1">&#160;</td>
              <td style="width: 5%; vertical-align: top;" rowspan="1">
                <div>Name:</div>
              </td>
              <td style="width: 32%; vertical-align: top;" rowspan="1">
                <div>Daniel S. Kelly</div>
              </td>
            </tr>
            <tr>
              <td style="width: 59.94%; vertical-align: top;">&#160;</td>
              <td style="width: 3%; vertical-align: top;">&#160;</td>
              <td style="width: 5%; vertical-align: top;">
                <div>Title:</div>
              </td>
              <td style="width: 32%; vertical-align: top;">
                <div>General Counsel and Secretary</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div>Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed on January 29, 2021 by the following persons in the capacities indicated.</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" border="0" id="za7246bdedfaa46e99f4d15e06d206fcc" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; border-collapse: collapse; text-align: left; color: #000000;">

            <tr>
              <td nowrap="nowrap" style="width: 36.54%; vertical-align: bottom; border-bottom: 2px solid rgb(0, 0, 0);">
                <div>
                  <div style="text-align: center; font-weight: bold;">Signature</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom; padding-bottom: 2px;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom; border-bottom: 2px solid rgb(0, 0, 0);" rowspan="1">
                <div>
                  <div style="text-align: center; font-weight: bold;">Title</div>
                </div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director and Chairman of the Board</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Michael V. Schrock</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: bottom; border-bottom: 2px solid rgb(0, 0, 0); text-align: center;">
                <div>
                  <div>*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>President and Chief Executive Officer, Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div>William E. Waltz Jr.</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">
                <div>(Principal Executive Officer)</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: bottom; border-bottom: 2px solid rgb(0, 0, 0); text-align: center;">
                <div>
                  <div>*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Vice President and Chief Financial Officer</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">David P. Johnson</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">
                <div>(Principal Financial Officer and Principal Accounting Officer)</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Jeri L. Isbell</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Wilbert W. James Jr.</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Betty R. Johnson</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Justin A. Kershaw</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">Scott H. Muse</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid #000000;">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;">
                <div style="color: #000000;">William R. VanArsdale</div>
              </td>
              <td style="width: 2%; vertical-align: middle;" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: middle;" rowspan="1">&#160;</td>
              <td style="width: 2%; vertical-align: middle;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: middle;" rowspan="1">&#160;</td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">
                <div>
                  <div style="text-align: center;">*</div>
                </div>
              </td>
              <td style="width: 2%; vertical-align: bottom; padding-bottom: 2px;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom; padding-bottom: 2px;" rowspan="1">
                <div>Director</div>
              </td>
            </tr>
            <tr>
              <td style="width: 36.54%; vertical-align: top;" rowspan="1">
                <div style="color: #000000;">A. Mark Zeffiro</div>
              </td>
              <td style="width: 2%; vertical-align: bottom;" rowspan="1" colspan="1">&#160;</td>
              <td style="width: 61%; vertical-align: bottom;" rowspan="1">&#160;&#160;</td>
            </tr>

        </table>
        <div><br>
        </div>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        <table cellspacing="0" cellpadding="0" border="0" id="z8fb48b029b964846bde6b6c4703794c1" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; border-collapse: collapse; text-align: left; color: #000000;">

            <tr>
              <td style="width: 4.06%; vertical-align: top; padding-bottom: 2px;">
                <div>* By:</div>
              </td>
              <td style="width: 30.62%; vertical-align: top; border-bottom: 2px solid rgb(0, 0, 0);">
                <div>
                  <div>/s/ Daniel S. Kelly</div>
                </div>
              </td>
              <td style="width: 65.17%; vertical-align: top; padding-bottom: 2px;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 4.06%; vertical-align: top;">&#160;</td>
              <td nowrap="nowrap" style="vertical-align: bottom;">
                <div>Daniel S. Kelly</div>
              </td>
              <td style="vertical-align: bottom;">&#160;</td>
            </tr>
            <tr>
              <td style="width: 4.06%; vertical-align: top;" rowspan="1">&#160;</td>
              <td style="vertical-align: bottom;" rowspan="1" colspan="2">
                <div>as Attorney-in-Fact</div>
              </td>
            </tr>

        </table>
        <div>&#160;</div>
        <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
          <div id="DSPFPageBreak" style="page-break-after:always;">
            <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
        </div>
        <div style="text-align: center; font-weight: bold;">INDEX TO EXHIBITS TO REGISTRATION STATEMENT ON FORM S-8</div>
        <div>&#160;</div>
        <div style="font-weight: bold;">Exhibits</div>
        <div> <br>
        </div>
        <table cellspacing="0" cellpadding="0" id="zb0da8cf309b84ddfa54d8b7663f193f8" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="https://www.sec.gov/Archives/edgar/data/1666138/000166613819000049/atkorethirdamendedcertif.htm">3.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Third Amended and Restated Certificate of Incorporation of Atkore International Group Inc. (incorporated by reference to Exhibit 10.2 to Atkore International Group Inc.&#8217;s Quarterly Report on Form 10-Q for the quarter ended March 29,
                  2019).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z8d24d0907ada4490b941c190cb1bcb4c" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="https://www.sec.gov/Archives/edgar/data/1666138/000166613819000049/atkorethirdamendedandres.htm">3.2</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Third Amended and Restated By-Laws of Atkore International Group Inc. (incorporated by reference to Exhibit 10.1 to Atkore International Group Inc.&#8217;s Quarterly Report on Form 10-Q for the quarter ended March 29, 2019).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z0da76d3268074e2d88c3f82e29e0deae" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="https://www.sec.gov/Archives/edgar/data/1666138/000119312516580177/d137452dex41.htm">4.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Form of Common Stock Certificate of Atkore International Group Inc. (incorporated by reference to Exhibit 4.1 to Atkore International Group Inc.&#8217;s Registration Statement on Form S-1 filed on May 5, 2016).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="zbe9b229c472d4c769038592d83bab407" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="https://www.sec.gov/Archives/edgar/data/1666138/000166613820000038/descriptionofcapitalst.htm">4.2</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Description of Capital Stock of Atkore International Group Inc. (incorporated by reference to Exhibit 4.2 to Atkore International Group Inc.&#8217;s Amendment No. 1 on Form 10-K/A, filed on February 4, 2020, to amend Atkore International
                  Group Inc.&#8217;s Annual Report on Form 10-K for the fiscal year ended September 30, 2019, initially filed on November 22, 2019).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="zfbc53c4eeaa444ffb42c67f3f145571f" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="brhc10019303_ex5-1.htm">5.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Opinion of Debevoise &amp; Plimpton LLP.</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z8efe26434e754860b9d062a279c5ed0c" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="https://www.sec.gov/Archives/edgar/data/1666138/000166613819000144/atkore-def14a2020.htm">10.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Atkore International Group Inc. 2020 Omnibus Incentive Plan (incorporated by reference to Annex A to Atkore International Group Inc.&#8217;s Definitive Proxy Statement on Schedule 14A filed on December 13, 2019).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z2229077f001f406fad6c186bb9554e4b" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="brhc10019303_ex5-1.htm">23.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Consent of Debevoise &amp; Plimpton LLP (included in Exhibit 5.1).</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="z10d64ecd63db42a1b81bcc91d5f91207" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="brhc10019303_ex23-2.htm">23.2</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Consent of Deloitte &amp; Touche LLP.</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <table cellspacing="0" cellpadding="0" id="zfe2f1f00f90146b88516b648b3630179" class="DSPFListTable" style="font-family: 'Times New Roman'; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

            <tr>
              <td style="width: 31.5pt; vertical-align: top;"><a href="brhc10019303_ex24-1.htm">24.1</a></td>
              <td style="width: auto; vertical-align: top;">
                <div>Powers of Attorney.</div>
              </td>
            </tr>

        </table>
        <div><br>
        </div>
        <br>
        <hr noshade="noshade" align="center" style="height: 2px; color: #000000; background-color: #000000; text-align: center; margin-left: auto; margin-right: auto; border: none;"></div>
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[{"type": "S-8", "sequence": "1", "filename": "brhc10019303_s8.htm", "description": "FORM S-8", "secsgml_size_bytes": 73554}]
{"company-data": {"conformed-name": "Atkore International Group Inc.", "cik": "0001666138", "assigned-sic": "3690", "irs-number": "900631463", "state-of-incorporation": "DE", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-252563", "film-number": "21571354"}, "business-address": {"street1": "16100 SOUTH LATHROP AVENUE", "city": "HARVEY", "state": "IL", "zip": "60426", "phone": "7083391610"}, "mail-address": {"street1": "16100 SOUTH LATHROP AVENUE", "city": "HARVEY", "state": "IL", "zip": "60426"}}
As filed with the Securities and Exchange Commission on January 29, 2021
Registration No. 333- ________
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
Atkore International Group Inc.
(Exact name of registrant as specified in its charter)
Delaware
90-0631463
(State or other jurisdiction of incorporation or organization)
(I.R.S. Employer Identification Number)
16100 South Lathrop Avenue,
Harvey, IL 60426
(708) 339-1610
(Address, including Zip Code, and Telephone Number, including Area Code of Registrant's Principal Executive Office)
ATKORE INTERNATIONAL GROUP INC. 2020 OMNIBUS INCENTIVE PLAN
(Full title of the plan)
Daniel S. Kelly, Esq.
Vice President - General Counsel and Secretary
Atkore International Group Inc.
16100 South Lathrop Avenue
Harvey, Illinois 60426
(708) 339-1610
(Name, address and telephone number of agent for service)
With a copy to:
Paul M. Rodel, Esq.
Debevoise & Plimpton LLP
919 Third Avenue
New York, New York 10022
(212) 909-6000
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer" and "smaller
        reporting company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer
☒
Accelerated filer
☐
Non-accelerated filer
☐
Smaller reporting company
☐
Emerging Growth Company
☐
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 7(a)(2)(B) of the
        Securities Act. ☐
CALCULATION OF REGISTRATION FEE
Title of Securities
to be registered
Amount
to be
registered(1)
Proposed
maximum
offering price
per share
Proposed
maximum
aggregate
offering price
Amount of
registration fee
Common Stock, par value
$0.01 per share
2,616,828
$
44.36
(2)
$
116,082,490
$
12,664.60
(1)
The number of shares being registered represents shares reserved for issuance pursuant to future awards under the Atkore International Group Inc. 2020 Omnibus Incentive Plan (the "Omnibus Incentive Plan"). Pursuant to Rule 416(a) of
                  the Securities Act of 1933, as amended, this Registration Statement shall also cover any additional shares of the Registrant's Common Stock that become issuable under the Omnibus Incentive Plan by reason of any stock dividend, stock
                  split, recapitalization or other similar transaction.
(2)
Computed pursuant to Rule 457(h) solely for purpose of determining the registration fee, based upon an assumed price of $44.36 per share of the Registrant's Common Stock, which is based on the average of the high sales price and low
                  sales price per share of the Registrant's Common Stock as reported on the New York Stock Exchange on January 27, 2021.
Part I
Information Required in the Section 10(a) Prospectus
All information required by Part I to be contained in the prospectus is omitted from this Registration Statement in accordance with Rule 428 under the Securities Act of 1933, as amended (the "
Securities Act"
).
Part II
Information Required in the Registration Statement
Item 3.
Incorporation of Certain Documents by Reference.
The Securities and Exchange Commission (the "
Commission
") allows Atkore International Group Inc. ("
us
", "
we
" or the "
Company
") to "incorporate by reference" into this Registration Statement information we file with
        the Commission in other documents. This means that we can disclose important information to you by referring to another document we filed with the Commission.
We incorporate by reference, as of their respective dates of filing, the documents listed below (excluding any portions of such documents that have been "furnished" but not "filed" for purposes of the Securities Exchange Act of 1934, as amended
        (the "
Exchange Act
")):
(a)
the Company's Annual Report for the fiscal year ended
September 30, 2020
as filed with the Commission on November 19,
                  2020 (File No. 001-37793);
(b)
the Company's Current Reports on Form 8-K filed with the Commission on
November 19, 2020
and
December 3, 2020
, in each case
with respect to Item 9.01 only
(File Nos. 001-37793); and
(c)
the portions of the Registrant's
Proxy Statement
on Schedule 14A, filed with the Commission on
December 11, 2020
(File No.
001-37793
), that are incorporated by reference into the
                      Registrant's Annual Report referred to above.
All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement that
          indicate that all securities offered hereby have been sold or that deregister all securities then remaining unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be a part hereof from the respective dates
          of filing of such documents.
Item 4.
Description of Securities.
Not applicable.
Item 5.
Interests of Named Experts and Counsel.
Not applicable.
Item 6.
Indemnification of Directors and Officers.
Delaware General Corporation Law
Atkore International Group Inc. is incorporated under the laws of the state of Delaware.
Section 145(a) of the General Corporation Law of the State of Delaware (the "
DGCL
") provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed
          action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that the person is or was a director, officer, employee or agent of the
          corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments,
          fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the
          best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe the person's conduct was unlawful.
Section 145(b) of the DGCL provides that a corporation may indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a
          judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another
          corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if the person
          acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which such person
          shall have been adjudged to be liable to the corporation unless and only to the extent that the Delaware Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of
          liability but in view of all of the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Delaware Court of Chancery or such other court shall deem proper.
Section 145(c) of the DGCL provides that to the extent that a present or former director or officer of a corporation has been successful on the merits or otherwise in defense of any action, suit or proceeding referred to in subsections (a) and
          (b) of Section 145 of the DGCL, or in defense of any claim, issue or matter therein, such person shall be indemnified against expenses (including attorneys' fees) actually and reasonably incurred by such person in connection therewith.
Section 145(e) of the DGCL provides that expenses (including attorneys' fees) incurred by an officer or director of the corporation in defending any civil, criminal, administrative or investigative action, suit or proceeding may be paid by the
          corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that such person is not
          entitled to be indemnified by the corporation as authorized in Section 145 of the DGCL.
Such expenses (including attorneys' fees) incurred by former directors and officers or other employees and agents of the corporation or by persons serving at the request of the corporation as directors, officers, employees or agents of another
          corporation, partnership, joint venture, trust or other enterprise may be so paid upon such terms and conditions, if any, as the corporation deems appropriate.
Section 145(g) of the DGCL specifically allows a Delaware corporation to purchase liability insurance on behalf of its directors and officers and to insure against potential liability of such directors and officers regardless of whether the
          corporation would have the power to indemnify such directors and officers under Section 145 of the DGCL.
Our Third Amended and Restated Certificate of Incorporation contains provisions permitted under the DGCL relating to the liability of directors.  These provisions eliminate a director's personal liability for monetary damages resulting from a
          breach of fiduciary duty, except in circumstances involving:
•
any breach of the director's duty of loyalty;
•
acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of the law;
•
Section 174 of the DGCL (unlawful dividends); or
•
any transaction from which the director derives an improper personal benefit.
Our Third Amended and Restated Certificate of Incorporation and our Third Amended and Restated By-laws require us to indemnify and advance expenses to our directors and officers to the fullest extent not prohibited by the DGCL and other applicable
        law, except in the case of a proceeding instituted by the director without the approval of our board of directors.  Our Third Amended and Restated Certificate of Incorporation and our Third Amended and Restated By-laws provide that we are required
        to indemnify our directors and executive officers, to the fullest extent permitted by law, for all judgments, fines, settlements, legal fees and other expenses incurred in connection with pending or threatened legal proceedings because of the
        director's or officer's positions with us or another entity that the director or officer serves at our request, subject to various conditions, and to advance funds to our directors and officers to enable them to defend against such proceedings.  To
        receive indemnification, the director or officer must have been successful in the legal proceeding or have acted in good faith and in what was reasonably believed to be a lawful manner in our best interest and, with respect to any criminal
        proceeding, have had no reasonable cause to believe his or her conduct was unlawful.
Section 102(b)(7) of the DGCL permits a Delaware corporation to include a provision in its certificate of incorporation eliminating or limiting the personal liability of directors to the corporation or its stockholders for monetary damages for
          breach of fiduciary duty as a director.  This provision, however, may not eliminate or limit a director's liability (1) for breach of the director's duty of loyalty to the corporation or its stockholders, (2) for acts or omissions not in good
          faith or involving intentional misconduct or a knowing violation of law, (3) under Section 174 of the DGCL, which provides for liability of directors for unlawful payments of dividends or unlawful stock purchases or redemptions, or (4) for any
          transaction from which the director derived an improper personal benefit. Our Third Amended and Restated Certificate of Incorporation contains such a provision.
Indemnification Agreements
We have entered into indemnification agreements with our directors. The indemnification agreements provide the directors with contractual rights to the indemnification and expense advancement rights provided under our Third Amended and
          Restated By-laws, as well as contractual rights to additional indemnification as provided in the indemnification agreements.
Directors' and Officers' Liability Insurance
We have obtained directors' and officers' liability insurance which insures against certain liabilities that our directors and officers and the directors and officers of our subsidiaries may, in such capacities, incur.
Item 7.
Exemption from Registration Claimed.
Not applicable.
Item 8.
Exhibits.
The Exhibits accompanying this Registration Statement are listed on the accompanying Exhibit Index.
Item 9.
Undertakings.
(a) The undersigned registrant hereby undertakes:
(1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:
(i) To include any prospectus required by Section 10(a)(3) of the Securities Act;
(ii) To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change
          in the information set forth in this Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and
          any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more
          than a 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective Registration Statement; and
(iii) To include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement;
provided, however
, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the
          Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act, that are incorporated by reference in this Registration Statement.
(2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such
          securities at that time shall be deemed to be the initial bona fide offering thereof.
(3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
(b) The undersigned registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where
          applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the
          securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
(c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been
          advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than
          the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in
          connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such
          indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, the Company certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be
          signed on its behalf by the undersigned, thereunto duly authorized, in the City of Harvey, Illinois on January 29, 2021.
Atkore International Group Inc.
By:
/s/ Daniel S. Kelly
Name:
Daniel S. Kelly
Title:
General Counsel and Secretary
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed on January 29, 2021 by the following persons in the capacities indicated.
Signature
Title
*
Director and Chairman of the Board
Michael V. Schrock
*
President and Chief Executive Officer, Director
William E. Waltz Jr.
(Principal Executive Officer)
*
Vice President and Chief Financial Officer
David P. Johnson
(Principal Financial Officer and Principal Accounting Officer)
*
Director
Jeri L. Isbell
*
Director
Wilbert W. James Jr.
*
Director
Betty R. Johnson
*
Director
Justin A. Kershaw
*
Director
Scott H. Muse
*
Director
William R. VanArsdale
*
Director
A. Mark Zeffiro
* By:
/s/ Daniel S. Kelly
Daniel S. Kelly
as Attorney-in-Fact
INDEX TO EXHIBITS TO REGISTRATION STATEMENT ON FORM S-8
Exhibits
3.1
Third Amended and Restated Certificate of Incorporation of Atkore International Group Inc. (incorporated by reference to Exhibit 10.2 to Atkore International Group Inc.'s Quarterly Report on Form 10-Q for the quarter ended March 29,
                  2019).
3.2
Third Amended and Restated By-Laws of Atkore International Group Inc. (incorporated by reference to Exhibit 10.1 to Atkore International Group Inc.'s Quarterly Report on Form 10-Q for the quarter ended March 29, 2019).
4.1
Form of Common Stock Certificate of Atkore International Group Inc. (incorporated by reference to Exhibit 4.1 to Atkore International Group Inc.'s Registration Statement on Form S-1 filed on May 5, 2016).
4.2
Description of Capital Stock of Atkore International Group Inc. (incorporated by reference to Exhibit 4.2 to Atkore International Group Inc.'s Amendment No. 1 on Form 10-K/A, filed on February 4, 2020, to amend Atkore International
                  Group Inc.'s Annual Report on Form 10-K for the fiscal year ended September 30, 2019, initially filed on November 22, 2019).
5.1
Opinion of Debevoise & Plimpton LLP.
10.1
Atkore International Group Inc. 2020 Omnibus Incentive Plan (incorporated by reference to Annex A to Atkore International Group Inc.'s Definitive Proxy Statement on Schedule 14A filed on December 13, 2019).
23.1
Consent of Debevoise & Plimpton LLP (included in Exhibit 5.1).
23.2
Consent of Deloitte & Touche LLP.
24.1
Powers of Attorney.