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  <title>8-K</title>
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  <div style="display:none;"><ix:header><ix:hidden><ix:nonNumeric id="F_966187e8-f54e-4743-8a76-20e12666bf47" name="dei:AmendmentFlag" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" format="ixt:fixed-false">false</ix:nonNumeric><ix:nonNumeric id="F_93598321-e26c-4e0c-b546-e40bd16c9b3d" name="dei:EntityCentralIndexKey" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a">0000811596</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:type="simple" xlink:href="kalu-20240724.xsd"/></ix:references><ix:resources><xbrli:context id="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0000811596</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2024-07-24</xbrli:startDate><xbrli:endDate>2024-07-24</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div>
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  <p style="padding-bottom:1pt;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:1.5pt double;text-align:left;"><span style="white-space:pre-wrap;font-size:2pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">UNITED STATES</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">SECURITIES AND EXCHANGE COMMISSION</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">Washington, D.C. 20549</span></p>
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  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:14pt;font-family:Times New Roman;min-width:fit-content;">FORM </span><span style="font-size:14pt;font-family:Times New Roman;"><ix:nonNumeric id="F_0bf0ce61-c50c-4688-ac03-de6618745acc" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:DocumentType"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:14pt;font-family:Times New Roman;min-width:fit-content;">8-K</span></ix:nonNumeric></span></p>
  <p style="margin-left:40%;padding-bottom:1pt;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:1pt solid;margin-right:40%;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:12pt;font-family:Times New Roman;min-width:fit-content;">THE SECURITIES EXCHANGE ACT OF 1934</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Date of Report (Date of Earliest Event Reported):</span><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_9e6185ff-eb98-4c77-aed5-fa014703db6c" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:DocumentPeriodEndDate" format="ixt:date-monthname-day-year-en"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> July 24, 2024</span></ix:nonNumeric></span></p>
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  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="font-size:20pt;font-family:Times New Roman;"><ix:nonNumeric id="F_dd105223-3109-4c1b-94f5-e138f0d18b11" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityRegistrantName"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:20pt;font-family:Times New Roman;min-width:fit-content;">KAISER ALUMINUM CORP</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:20pt;font-family:Times New Roman;min-width:fit-content;">ORATION</span></p>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:9pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_cfe820ec-c3c5-43a2-b60d-0b7fd38ef79f" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityIncorporationStateCountryCode" format="ixt-sec:stateprovnameen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Delaware</span></ix:nonNumeric></span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_c6109aa2-e5cf-4f6e-920a-06ee951f8ecb" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityTaxIdentificationNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">94-3030279</span></ix:nonNumeric></span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(State or Other Jurisdiction</span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">of Incorporation)</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(I.R.S. Employer</span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Identification No.)</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:8pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:8pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:8pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_bdf38baf-57b5-4d79-a1ed-da1d634cae02" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityAddressAddressLine1"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">1550 West McEwen Drive</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">, </span><span><ix:nonNumeric id="F_c74cff28-6997-43f9-b490-5a716561d6a6" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityAddressAddressLine2"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Suite 500</span></ix:nonNumeric></span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_2903095d-f87f-4f5b-bddb-ad98902ea14b" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityAddressCityOrTown"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Franklin</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">, </span><span><ix:nonNumeric id="F_ca4cb0e6-7f37-452a-930f-c965f583cb2d" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityAddressStateOrProvince" format="ixt-sec:stateprovnameen"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">Tennessee</span></ix:nonNumeric></span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:bottom;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span><ix:nonNumeric id="F_0e3ef31a-c693-4744-bd24-0237fd3a8ee0" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityAddressPostalZipCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;">37067</span></ix:nonNumeric></span></p></td>
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    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(Address of Principal Executive Offices)</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="vertical-align:top;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(Zip Code)</span></p></td>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_2af048a6-ee9e-49d9-a045-2540e8ff001e" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:CityAreaCode"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">(629)</span></ix:nonNumeric></span><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;"> </span><span style="font-size:10pt;font-family:Times New Roman;"><ix:nonNumeric id="F_1ca730c3-c7f4-45cb-a129-46eb5560bdf0" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:LocalPhoneNumber"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">252-7040</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">(Registrant's telephone number, including area code)</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Not Applicable</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">(Former Name or Former Address, if Changed Since Last Report)</span></p>
  <p style="margin-left:40%;padding-bottom:1pt;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:1pt solid;margin-right:40%;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;"> </span></p>
  <p style="font-size:10pt;margin-top:9pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:9pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
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    <td style="padding-left:0.01in;vertical-align:top;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_a3c55e2a-7689-4743-a6c7-4f6f1589f19e" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:WrittenCommunications" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p></td>
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    <td style="padding-left:0.01in;vertical-align:top;padding-right:0.01in;"><p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</span></p></td>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Securities registered pursuant to Section 12(b) of the Act:</span></p>
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    <td style="width:41.02%;"/>
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    <td style="vertical-align:bottom;border-bottom:0.5pt solid;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Trading</span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Symbol(s)</span></p></td>
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    <td style="vertical-align:bottom;border-bottom:0.5pt solid;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Name of each exchange on which registered</span></p></td>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:4pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).</span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Emerging growth company </span><span style="font-size:10pt;font-family:'Segoe UI Symbol',sans-serif;"><ix:nonNumeric id="F_ad4c3292-785d-4ef3-ac81-47992c264c04" contextRef="C_dd5b8e8d-c190-4bb4-b71f-d0e2e20bc36a" name="dei:EntityEmergingGrowthCompany" format="ixt-sec:boolballotbox"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:'Segoe UI Symbol',sans-serif;min-width:fit-content;">&#9744;</span></ix:nonNumeric></span></p>
  <p style="font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">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 standard provided pursuant to Section 13(a) of the Exchange Act. </span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:'Segoe UI Symbol',sans-serif;min-width:fit-content;">&#9744;</span></p>
  <p style="padding-bottom:1pt;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;border-bottom:1.5pt double;text-align:left;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:6pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div class="page-node-content"><div style="flex-direction:column;display:flex;min-height:1in;justify-content:flex-end;"></div></div>
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  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 2.02. Results of Operations and Financial Condition.</span></p>
  <p style="text-indent:4.533%;font-size:10pt;margin-top:6pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">On July 24, 2024, Kaiser Aluminum Corporation (the &#8220;Company&#8221;) issued a press release reporting its preliminary, unaudited financial results for the quarter ended June 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference into this Item 2.02.</span></p>
  <p style="text-indent:4.533%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">The information in Item 2.02, including Exhibit 99.1, of this Current Report on Form 8-K shall not be deemed to be &#8220;filed&#8221; for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the &#8220;Exchange Act&#8221;), or otherwise subject to the liabilities of that section, and shall not be deemed incorporated by reference into any filing by the Company under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated therein by reference.</span></p>
  <p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Item 9.01. Financial Statements and Exhibits.</span></p>
  <div class="item-list-element-wrapper" style="margin-left:4.528%;display:flex;margin-top:6pt;justify-content:flex-start;align-items:baseline;margin-bottom:0;min-width:4.537%;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:4.7521786492374725%;display:inline-flex;justify-content:flex-start;">(d)</span><div style="width:100%;display:inline;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;font-style:italic;min-width:fit-content;">Exhibits</span><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">.</span></div></div>
  <p style="text-indent:-4.749%;padding-left:4.533%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
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    <td style="padding-top:0.01in;vertical-align:bottom;border-bottom:0.25pt solid #000000;padding-right:0.01in;text-align:left;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Exhibit</span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Number</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;border-bottom:0.25pt solid #ffffff03;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;border-bottom:0.25pt solid #000000;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Description</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#160;99.1</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><a href="kalu-ex99_1.htm"><span style="color:#0000ff;white-space:pre-wrap;text-decoration:underline;min-width:fit-content;">Press release dated July 24, 2024.</span></a></p></td>
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    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">&#160;104</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Cover Page Interactive Data File (embedded within the Inline XBRL document).</span></p></td>
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  <p style="text-indent:-4.749%;padding-left:4.533%;font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
  <div class="page-node-content"><div style="flex-direction:column;display:flex;min-height:1in;justify-content:flex-end;"></div></div>
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  <p style="font-size:10pt;margin-top:18pt;font-family:Times New Roman;margin-bottom:0;text-align:center;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">SIGNATURES</span></p>
  <p style="text-indent:4.533%;font-size:10pt;margin-top:12pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</span></p>
  <p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;font-size:10pt;font-family:Times New Roman;min-width:fit-content;">&#160;</span></p>
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    <td style="padding-top:0.01in;vertical-align:top;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td colspan="2" style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:2pt;font-family:Times New Roman;margin-bottom:0;margin-right:0.027777777777777776in;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">KAISER ALUMINUM CORPORATION</span></p><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">(Registrant)</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:middle;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
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    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="white-space:pre-wrap;min-width:fit-content;">&#160;</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:top;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">By:</span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;border-bottom:0.25pt solid #000000;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">/s/ Cherrie I. Tsai</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:middle;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:2pt;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Cherrie I. Tsai</span></p></td>
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    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;font-weight:bold;min-width:fit-content;"> </span></p></td>
    <td style="padding-top:0.01in;vertical-align:bottom;padding-right:0.01in;"><p style="font-size:10pt;margin-top:0;font-family:Times New Roman;margin-bottom:0;text-align:left;"><span style="color:#000000;white-space:pre-wrap;min-width:fit-content;">Vice President, Deputy General Counsel and Corporate Secretary</span></p></td>
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{"company-data": {"conformed-name": "KAISER ALUMINUM CORP", "cik": "0000811596", "assigned-sic": "3350", "organization-name": "04 Manufacturing", "irs-number": "943030279", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-09447", "film-number": "241138538"}, "business-address": {"street1": "27422 PORTOLA PARKWAY, SUITE 200", "city": "FOOTHILL RANCH", "state": "CA", "zip": "92610-2831", "phone": "949-614-1740"}, "mail-address": {"street1": "27422 PORTOLA PARKWAY, SUITE 200", "city": "FOOTHILL RANCH", "state": "CA", "zip": "92610-2831"}, "former-company": {"former-conformed-name": "KAISERTECH LTD", "date-changed": "19901122"}}
8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM
8-K
CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934
Date of Report (Date of Earliest Event Reported):
July 24, 2024
KAISER ALUMINUM CORP
ORATION
(Exact Name of Registrant as Specified in its Charter)
Delaware
1-09447
94-3030279
(State or Other Jurisdiction
of Incorporation)
(Commission File Number)
(I.R.S. Employer
Identification No.)
1550 West McEwen Drive
,
Suite 500
Franklin
,
Tennessee
37067
(Address of Principal Executive Offices)
(Zip Code)
(629)
252-7040
(Registrant's telephone number, including area code)
Not Applicable
(Former Name or Former Address, if Changed Since Last Report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol(s)
Name of each exchange on which registered
Common Stock, par value $0.01 per share
KALU
Nasdaq Global Select Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR 240.12b-2).
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 standard provided pursuant to Section 13(a) of the Exchange Act.
☐
Item 2.02. Results of Operations and Financial Condition.
On July 24, 2024, Kaiser Aluminum Corporation (the "Company") issued a press release reporting its preliminary, unaudited financial results for the quarter ended June 30, 2024. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference into this Item 2.02.
The information in Item 2.02, including Exhibit 99.1, of this Current Report on Form 8-K shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, and shall not be deemed incorporated by reference into any filing by the Company under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated therein by reference.
Item 9.01. Financial Statements and Exhibits.
(d)
Exhibits
.
Exhibit
Number
Description
99.1
Press release dated July 24, 2024.
104
Cover Page Interactive Data File (embedded within the Inline XBRL document).
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
KAISER ALUMINUM CORPORATION
(Registrant)
By:
/s/ Cherrie I. Tsai
Cherrie I. Tsai
Vice President, Deputy General Counsel and Corporate Secretary
Date: July 24, 2024