<SUBMISSION>
<ACCESSION-NUMBER>0000950142-23-002263
<TYPE>POS AM
<PUBLIC-DOCUMENT-COUNT>1
<FILING-DATE>20230818
<DATE-OF-FILING-DATE-CHANGE>20230818
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>Arconic Corp
<CIK>0001790982
<ASSIGNED-SIC>3350
<IRS-NUMBER>842745636
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>POS AM
<ACT>33
<FILE-NUMBER>333-237573
<FILM-NUMBER>231183888
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>201 ISABELLA STREET
<CITY>PITTSBURGH
<STATE>PA
<ZIP>15212-5872
<PHONE>(412) 992-2500
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>201 ISABELLA STREET
<CITY>PITTSBURGH
<STATE>PA
<ZIP>15212-5872
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>Arconic Rolled Products Corp
<DATE-CHANGED>20191011
</FORMER-COMPANY>
</FILER>
<DOCUMENT>
<TYPE>POS AM
<SEQUENCE>1
<FILENAME>eh230391935_posam-573.htm
<DESCRIPTION>AMENDMENT NO. 1
<TEXT>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>As filed with the Securities and Exchange Commission
on August 18, 2023</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><B>Registration No.&nbsp;333-237573</B></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0pt; margin-bottom: 0pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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

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

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

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>POST-EFFECTIVE AMENDMENT NO. 1</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>FORM&nbsp;S-1</B></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B><I>THE SECURITIES ACT OF 1933</I></B></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Exact name of registrant as specified in its charter)</P>

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font-size: 10pt; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: top; font: 10pt Times New Roman, Times, Serif; text-align: center; width: 32%"><B>Delaware</B></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font: 10pt Times New Roman, Times, Serif; text-align: center; width: 34%"><B>3350</B></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; font: 10pt Times New Roman, Times, Serif; text-align: center; width: 32%"><FONT STYLE="background-color: white"><B>84-2745636</B></FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(State or Other Jurisdiction of</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Incorporation or Organization)</P></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="vertical-align: top">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Primary Standard Industrial</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Classification Code Number)</P></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="vertical-align: top">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(I.R.S. Employer</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">Identification Number)</P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center; background-color: white">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center; background-color: white"><B>201 Isabella Street, Suite
400, Pittsburgh, Pennsylvania 15212-5872</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(412) 992-2500</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Address, including zip code, and telephone number,
including area code, of registrant&#8217;s principal executive offices)</P>

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center; background-color: white"><B>201 Isabella Street, Suite
400, Pittsburgh, Pennsylvania 15212-5872</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>(412) 992-2500</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center">(Name, address, including zip code, and telephone number,
including area code, of agent for service)</P>

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Brian Janson, Esq.</B><BR>
<B>Luke Jennings, Esq.<BR>
Paul, Weiss, Rifkind, Wharton &amp; Garrison LLP<BR>
1285 Avenue of the Americas</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>New York, New York 10019-6064</B><BR>
<B>(212)&nbsp;373-3000</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><B>Approximate date of commencement of proposed sale
to the public: Not Applicable.</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If any of the securities being registered on this Form&nbsp;are to be offered
on a delayed or continuous basis pursuant to Rule&nbsp;415 under the Securities Act, check the following box: <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If this Form&nbsp;is filed to register additional securities for an offering
pursuant to Rule&nbsp;462(b)&nbsp;under the Securities Act, please check the following box and list the Securities Act registration statement
number of the earlier effective registration statement for the same offering. <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If this Form&nbsp;is a post-effective amendment filed pursuant to Rule&nbsp;462(c)&nbsp;under
the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration
statement for the same offering. <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">If this Form&nbsp;is a post-effective amendment filed pursuant to Rule&nbsp;462(d)&nbsp;under
the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration
statement for the same offering. <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Indicate by check mark whether the registrant is a large accelerated filer,
an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of &#8220;large
accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company&#8221; and &#8220;emerging growth company&#8221;
in Rule&nbsp;12b-2 of the Exchange Act.</P>

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 35%">Large accelerated filer</TD>
    <TD STYLE="width: 10%"><FONT STYLE="font-family: Wingdings">x</FONT></TD>
    <TD STYLE="width: 10%">&nbsp;</TD>
    <TD STYLE="width: 40%">Accelerated filer</TD>
    <TD STYLE="width: 5%"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>Non-accelerated filer</TD>
    <TD><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>Smaller reporting company</TD>
    <TD><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Emerging growth company</TD>
    <TD><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">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&nbsp;7(a)(2)(B)&nbsp;of the Securities Act. <FONT STYLE="font-family: Wingdings">&uml;</FONT></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="background-color: white"><B>This filing constitutes a Post-Effective
Amendment to the Registration Statement on Form&nbsp;S-1&nbsp;(File&nbsp;No.&nbsp;333-237573),&nbsp;which was declared effective on April
13, 2020. This Post-Effective Amendment shall hereafter become effective in accordance with Section&nbsp;8(c)&nbsp;of the Securities Act
of 1933, as amended (the &#8220;Securities Act&#8221;), on such date as the Securities and Exchange Commission, acting pursuant to Section&nbsp;8(c)&nbsp;of
the Securities Act, may determine.</B></FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="background-color: white"><B></B></FONT></P>

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


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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-indent: 0.5in">This Post-Effective Amendment No.&nbsp;1 filed by
Arconic Corporation, a Delaware corporation (the &#8220;Registrant&#8221;), deregisters all securities remaining unsold under the Registration
Statement on Form&nbsp;S-1 (No.&nbsp;333-237573) (the &#8220;Registration Statement&#8221;), which was originally filed with the Securities
and Exchange Commission (the &#8220;Commission&#8221;) on April 6, 2020, and declared effective by the Commission on April 13, 2020.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-indent: 0.5in">On May 4, 2023, the Registrant entered into an Agreement
and Plan of Merger with Arsenal AIC Parent LLC, a Delaware limited liability company (&#8220;Parent&#8221;), and Arsenal AIC MergeCo Inc.,
a Delaware corporation and a wholly owned subsidiary of Parent (&#8220;Merger Sub&#8221;), providing for, among other things, the merger
of Merger Sub with and into the Registrant (the &#8220;Merger&#8221;), with the Registrant surviving the Merger as a wholly owned subsidiary
of Parent. The Merger became effective on August 18, 2023, pursuant to a Certificate of Merger filed with the Secretary of State of the
State of Delaware.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt; text-indent: 0.5in">As a result of the Merger, the Registrant has terminated
any and all offerings of its securities pursuant to the Registration Statement. In accordance with undertakings made by the Registrant
in the Registration Statement to remove from registration, by means of a post-effective amendment, any of the securities registered under
the Registration Statement that remain unsold at the termination of the offering, the Registrant hereby amends the Registration Statement
and removes from registration any and all securities registered under the Registration Statement that remain unsold as of the date of
this Post-Effective Amendment, and hereby terminates the effectiveness of the Registration Statement.</P>

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

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

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

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


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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Pursuant to the requirements of the Securities Act of 1933, the registrant
has duly caused this Post-Effective Amendment No.&nbsp;1 to the Registration Statement to be signed on its behalf by the undersigned,
thereunto duly authorized, in Pittsburgh, Pennsylvania, on August 18, 2023.</P>

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD>&nbsp;</TD>
    <TD COLSPAN="2" STYLE="vertical-align: top"><B>Arconic Corporation</B></TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 35%">&nbsp;</TD>
    <TD STYLE="width: 10%">&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">By:</TD>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid">/s/ Adam Wheeler</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: top">Adam Wheeler</TD>
    <TD>&nbsp;</TD></TR>
  <TR>
    <TD>&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: top">Vice President and Secretary</TD>
    <TD>&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">Pursuant to Rule 478 under the Securities Act of 1933, as amended, no other
person is required to sign this Post-Effective Amendment No. 1 to the Registration Statement.</P>

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

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

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

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

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

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