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<div id="DSPFiXBRLHidden" style="display: none;"><ix:header><ix:hidden><ix:nonNumeric name="dei:AmendmentFlag" id="Fact_aa56dc32ee654109863a3f011e41881c" contextRef="c20220203to20220203" format="ixt:booleanfalse">false</ix:nonNumeric><ix:nonNumeric name="dei:CurrentFiscalYearEndDate" id="Fact_3cbcb5af95fb419e9fa60aa5e3a070f2" contextRef="c20220203to20220203" format="ixt:datemonthday">12-31</ix:nonNumeric><ix:nonNumeric name="dei:EntityCentralIndexKey" id="Fact_6eddf4983f5a4ef9965d962a391aeea7" contextRef="c20220203to20220203">0001492691</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:href="knx-20220203.xsd" xlink:type="simple"></link:schemaRef></ix:references><ix:resources><xbrli:context id="c20220203to20220203"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001492691</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2022-02-03</xbrli:startDate><xbrli:endDate>2022-02-03</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div>

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      <div style="margin-top: 0.65pt; font-family: Arial; font-size: 17pt; font-weight: bold; text-align: center;">UNITED STATES</div>

      <div style="margin-top: 0px; margin-bottom: 0px; font-family: Arial; font-size: 17pt; font-weight: bold; text-align: center;">SECURITIES AND EXCHANGE COMMISSION</div>

      <div style="margin: 0px 0px 4px; font-family: Arial; font-size: 11pt; font-weight: bold; text-align: center;">
<div>Washington, D.C. 20549
        </div>
<hr style="height: 1px; width: 50%; color: #000000; background-color: #000000; text-align: center; border: none; margin-left: auto; margin-right: auto;" /></div>

      <div style="font-family: Arial; font-size: 17pt; font-weight: bold; text-align: center;">FORM <ix:nonNumeric name="dei:DocumentType" id="Fact_1be4d2ef792e4b418b4b9ea79ecfb7c7" contextRef="c20220203to20220203">8-K</ix:nonNumeric></div>

      <div style="margin-right: 73.9pt; margin-left: 73.1pt; margin-top: 13.35pt; font-family: Arial; font-size: 9pt; text-align: center;">CURRENT REPORT</div>

      <div style="margin-right: 116.35pt; margin-left: 115.7pt; margin-top: 0.45pt; font-family: Arial; font-size: 9pt; text-align: center;">Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 </div>

      <div style="margin-right: 116.35pt; margin-left: 115.7pt; margin-top: 0.45pt; font-family: Arial; font-size: 9pt; text-align: center;"><br />
        Date of Report (Date of earliest event reported): <ix:nonNumeric name="dei:DocumentPeriodEndDate" id="Fact_0d4c2720c59e4c1abf870dba8d785b09" contextRef="c20220203to20220203" format="ixt:datemonthdayyearen">February 3, 2022</ix:nonNumeric></div>

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        <hr style="height: 1px; width: 50%; color: rgb(0, 0, 0); background-color: rgb(0, 0, 0); text-align: center; border: medium none; margin-left: auto; margin-right: auto;" /> </div>

      <div style="margin-top: 0.45pt; font-family: Arial; font-size: 9pt; text-align: center;"> <div><img width="750" height="98" src="knxswftlogo.jpg" alt="graphic" /></div>

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      <div style="margin-right: 73.9pt; margin-left: 73.35pt; margin-top: 4.85pt; font-family: Arial; font-size: 19pt; font-weight: bold; text-align: center;"><ix:nonNumeric name="dei:EntityRegistrantName" id="Fact_351f3f0ad7a349aeb6b33c3ab12db147" contextRef="c20220203to20220203">Knight-Swift Transportation Holdings Inc.</ix:nonNumeric><br />
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      <div style="margin-right: 73.9pt; margin-left: 73.2pt; margin-top: 12.65pt; font-family: Arial; font-size: 10pt; text-align: center;">(Exact name of registrant as specified in its charter)</div>

      <div style="margin-right: 73.9pt; margin-left: 73.2pt; margin-top: 12.65pt; font-family: Arial; font-size: 10pt; text-align: center;"> <br />
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              <div style="font-size: 10pt; font-weight: bold;"><ix:nonNumeric name="dei:EntityFileNumber" id="Fact_6afc9e30f1b54d6a95c4a86f42be47a8" contextRef="c20220203to20220203">001-35007</ix:nonNumeric><br />
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    <td style="width: 34.55%; vertical-align: bottom; border-bottom: 1px solid rgb(0, 0, 0); font-family: Arial; border-top: 1px solid rgb(0, 0, 0); text-align: center;">
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    <td style="width: 36.54%; vertical-align: top; font-family: Arial;">
              <div style="font-size: 10pt; text-align: center;">(State or other jurisdiction of incorporation)</div>
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              <div style="font-size: 10pt; text-align: center;">(Commission File Number)</div>
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              <div style="font-size: 10pt; text-align: center;">(IRS Employer Identification No.)</div>
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                <div style="font-family: Arial; font-size: 10pt; font-weight: bold;"> <br />
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                <div style="font-family: Arial; font-size: 10pt; font-weight: bold; text-align: center;"><ix:nonNumeric name="dei:EntityAddressAddressLine1" id="Fact_1b9788c14bbb479a80a6835b7cc5813b" contextRef="c20220203to20220203">2002 West Wahalla Lane</ix:nonNumeric><br />
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                <div style="font-family: Arial; font-size: 10pt; font-weight: bold; text-align: center;"><ix:nonNumeric name="dei:EntityAddressCityOrTown" id="Fact_ac182013a4664e268e88acc5d7b9d189" contextRef="c20220203to20220203">Phoenix</ix:nonNumeric>, <ix:nonNumeric name="dei:EntityAddressStateOrProvince" id="Fact_1571167a0e2342d499b355f4cd7f6e09" contextRef="c20220203to20220203" format="ixt-sec:stateprovnameen">Arizona</ix:nonNumeric> <ix:nonNumeric name="dei:EntityAddressPostalZipCode" id="Fact_edd0df43a6f546cdad7e0865708d115f" contextRef="c20220203to20220203">85027</ix:nonNumeric></div>
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    <td style="width: 34.55%; vertical-align: top; font-family: Arial;"><br />
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      <div style="margin-top: 0.9pt; font-family: Arial; font-size: 8pt; text-align: center;">(Address of principal executive offices and zip code)</div>

      <div style="margin-right: 73.9pt; margin-left: 73.05pt; margin-top: 3.2pt; font-family: Arial; font-size: 9pt; font-weight: bold; text-align: center;">(<ix:nonNumeric name="dei:CityAreaCode" id="Fact_7f835bdbaeae432ca034c5d08357daa2" contextRef="c20220203to20220203">602</ix:nonNumeric>)
        <ix:nonNumeric name="dei:LocalPhoneNumber" id="Fact_f255e029dd2b439ca4c36cc0eff381c1" contextRef="c20220203to20220203">269-2000</ix:nonNumeric></div>

      <div style="margin: 0px 73.9pt 0px 73.05pt; font-family: Arial; font-size: 9pt; font-weight: normal; text-align: center;">(Registrant's telephone number, including area code)</div>

      <div style="margin-right: 10.95pt; margin-left: 9.25pt; margin-top: 8.6pt; font-family: Arial; font-size: 9pt; text-align: center; font-weight: bold;">N/A</div>

      <div style="margin: 0px 10.95pt 0px 9.25pt; font-family: Arial; font-size: 9pt; text-align: center;">(Former name or former address, if changed since last report)</div>

      <div style="margin-top: 8.6pt; font-family: Arial; font-size: 9pt;">Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</div>

      <div style="font-family: Arial; font-size: 9pt;"> <br />
      </div>

      <div>
        <table cellspacing="0" cellpadding="0" style="font-family: 'Times New Roman',Times,serif; font-size: 10pt; margin-top: 0.65pt; width: 100%; color: rgb(0, 0, 0);" class="DSPFListTable">


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                <div style="margin-left: 14.95pt; margin-top: 0.65pt;"><ix:nonNumeric name="dei:WrittenCommunications" id="Fact_9dfa1e70f20240cdbbdaeca3a4b07b4e" contextRef="c20220203to20220203" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
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    <td style="width: auto; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="text-indent: 2.75pt; margin-top: 0.65pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</div>
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      </div>

      <div>
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    <td style="width: 33.25pt; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="margin-left: 14.95pt;"><ix:nonNumeric name="dei:SolicitingMaterial" id="Fact_ae8c89d1625e47029380b63723a1e6b7" contextRef="c20220203to20220203" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
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    <td style="width: auto; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="text-indent: 2.75pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</div>
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                <div style="margin-left: 14.95pt;"><ix:nonNumeric name="dei:PreCommencementTenderOffer" id="Fact_0102bea70b804a87bf6fe5d7efc0c5aa" contextRef="c20220203to20220203" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
                </div>
              </td>

    <td style="width: auto; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="text-indent: 2.75pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</div>
              </td>

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      </div>

      <div>
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    <td style="width: 33.25pt; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="margin-left: 14.95pt;"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" id="Fact_f5e3e62423ec46efa49e19536855b404" contextRef="c20220203to20220203" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
                </div>
              </td>

    <td style="width: auto; vertical-align: top; font-family: Arial; font-size: 9pt;">
                <div style="text-indent: 2.75pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</div>
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      </div>

      <div style="margin-top: 6.05pt; font-family: Arial; font-size: 9pt;">Securities registered pursuant to Section 12(b) of the Act:</div>

      <div style="font-family: Arial; font-size: 9pt;"> <br />
      </div>

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              <div style="font-size: 9pt; font-weight: bold; text-align: center;">Title of each class</div>
            </td>

    <td colspan="1" style="width: 1%; vertical-align: top; font-family: Arial; padding-bottom: 1px;">&#160;</td>

    <td style="width: 22.89%; vertical-align: top; border-bottom: 1px solid rgb(0, 0, 0); font-family: Arial;">
              <div style="font-size: 9pt; font-weight: bold; text-align: center;">Trading Symbol(s)</div>
            </td>

    <td colspan="1" style="width: 1%; vertical-align: top; font-family: Arial; padding-bottom: 1px;">&#160;</td>

    <td style="width: 40.76%; vertical-align: top; border-bottom: 1px solid rgb(0, 0, 0); font-family: Arial;">
              <div style="font-size: 9pt; font-weight: bold; text-align: center;">Name of each exchange on which registered</div>
            </td>

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    <td style="width: 36.35%; vertical-align: top; font-family: Arial;">
              <div style="font-size: 9pt; text-align: center;"><ix:nonNumeric name="dei:Security12bTitle" id="Fact_1097288c674146ab92d14b86dbfc2c20" contextRef="c20220203to20220203">Common Stock $0.01 Par Value</ix:nonNumeric><br />
              </div>
            </td>

    <td colspan="1" style="width: 1%; vertical-align: top; font-family: Arial;">&#160;</td>

    <td style="width: 22.89%; vertical-align: top; font-family: Arial;">
              <div style="font-size: 9pt; text-align: center;"><ix:nonNumeric name="dei:TradingSymbol" id="Fact_8c0a23565f7747b4b1bf6788d8d6ed34" contextRef="c20220203to20220203">KNX</ix:nonNumeric><br />
              </div>
            </td>

    <td colspan="1" style="width: 1%; vertical-align: top; font-family: Arial;">&#160;</td>

    <td style="width: 40.76%; vertical-align: top; font-family: Arial;">
              <div style="font-size: 9pt; text-align: center;"><ix:nonNumeric name="dei:SecurityExchangeName" id="Fact_fad0e2806ada46c5b3a074c6a5eb104f" contextRef="c20220203to20220203" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric><br />
              </div>
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      <div style="margin-top: 6.9pt; font-family: Arial; font-size: 9pt; text-align: justify;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or
        Rule 12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</div>

      <div style="margin-top: 1.35pt; font-family: Arial; font-size: 10pt;"><span style="font-size: 9pt; font-family: Arial;">Emerging growth company</span><span style="font-size: 9pt;"> <ix:nonNumeric name="dei:EntityEmergingGrowthCompany" id="Fact_1b5990d394c141de9e3bfbd42931da7e" contextRef="c20220203to20220203" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric></span></div>

      <div style="margin-top: 1.35pt; font-family: Arial; font-size: 9pt; text-align: justify;">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 13(a) of the Exchange Act. <span style="font-weight: bold;">&#9744;</span></div>

      <div style="clear: both; margin-top: 10pt; margin-bottom: 10pt;" class="DSPFPageBreakArea">
        <div style="page-break-after: always;" class="DSPFPageBreak">
          <hr style="margin: 4px 0px; width: 100%; border-width: 0px; height: 2px; color: rgb(0, 0, 0); background-color: rgb(0, 0, 0); clear: both;" /></div>

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              <div style="font-size: 10pt; font-style: italic; font-weight: bold;">ITEM 5.03</div>
            </td>

    <td style="width: 82.65%; vertical-align: top; background-color: rgb(157, 27, 17); font-family: Arial; color: rgb(255, 255, 255);">
              <div style="font-size: 10pt; font-style: italic; font-weight: bold;">AMENDMENTS TO ARTICLES OF INCORPORATION OR BYLAWS; CHANGE IN FISCAL YEAR</div>
            </td>

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      <div style="margin-top: 6.6pt; margin-bottom: 4.4pt; font-family: Arial; font-size: 9pt; text-align: justify;">Effective February 3, 2022, the Board of Directors (the &#8220;Board&#8221;) of Knight-Swift Transportation Holdings Inc., a Delaware corporation (the
        &#8220;Company&#8221;), approved the Fourth Amended and Restated By-laws of the Company to eliminate the supermajority requirement for a stockholder amendment to the Company&#8217;s By-laws and replace it with a simple majority voting standard. The Board approved
        the amendment in response to a stockholder proposal to eliminate all supermajority voting requirements in the Company&#8217;s Certificate of Incorporation and By-laws, which was approved by stockholders at the Company&#8217;s 2021 Annual Meeting of
        Stockholders.</div>

      <div style="margin-top: 6.6pt; margin-bottom: 4.4pt; font-family: Arial; font-size: 9pt; text-align: justify;">This description is qualified in its entirety by reference to the text of the Company&#8217;s Fourth Amended and Restated By-Laws, which are
        attached as Exhibit 3.1 to this Current Report on Form 8-K.</div>

      <div style="margin-top: 6.1pt; font-family: Arial; font-size: 10pt;">
        <table cellspacing="0" cellpadding="0" style="font-family: 'Times New Roman',Times,serif; font-size: 10pt; width: 100%; color: rgb(0, 0, 0);">


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    <td style="width: 17.35%; vertical-align: top; background-color: rgb(0, 70, 126); font-family: Arial;">
                <div style="font-size: 10pt; font-style: italic; font-weight: bold; color: rgb(255, 255, 255);">ITEM 9.01</div>
              </td>

    <td style="width: 82.65%; vertical-align: top; background-color: rgb(157, 27, 17); font-family: Arial;">
                <div style="font-size: 10pt; font-style: italic; font-weight: bold; color: rgb(255, 255, 255);">FINANCIAL STATEMENTS AND EXHIBITS</div>
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      </div>

      <div style="margin-top: 6.1pt; font-family: Arial; font-size: 9pt;">(d) Exhibits</div>

      <div style="font-family: Arial; font-size: 9pt;"> <br />
      </div>

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              <div style="font-weight: bold;"> Exhibit</div>
            </td>

    <td style="border-bottom: 1px solid #000000; height: auto; vertical-align: middle; width: 0.6%; font-family: Arial; font-size: 9pt; text-align: left;">&#160;</td>

    <td style="border-bottom: 1px solid #000000; height: auto; vertical-align: middle; width: 87.26%; font-family: 'Times New Roman', Times, serif; font-size: 10pt; text-align: left;">
              <div style="font-family: Arial; font-size: 9pt; font-weight: bold;"> Description</div>
            </td>

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    <td style="border-bottom: 1px solid #000000; height: auto; vertical-align: middle; width: 12.14%; font-family: Arial; font-size: 9pt; text-align: left;">
              <div><a href="exhibit31.htm">Exhibit 3.1</a></div>
            </td>

    <td style="border-bottom: 1px solid #000000; height: auto; vertical-align: middle; width: 0.6%; font-family: Arial; font-size: 9pt; text-align: left;">&#160;</td>

    <td style="border-bottom: 1px solid #000000; height: auto; vertical-align: middle; width: 87.26%; text-align: left;">
              <div style="font-family: 'Times New Roman',Times,serif; font-size: 10pt;"><span style="font-size: 9pt; font-family: Arial;"> Fourth Amended and Restated By-laws of Knight-Swift Transportation Holdings Inc.<br />
                </span></div>
            </td>

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              <div>Exhibit 104</div>
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              <div> Cover Page Interactive Data File (embedded within the Inline XBRL document)</div>
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      <div style="text-align: center;"><span style="font-weight: bold;"> </span><span style="font-family: Arial;"><span style="font-weight: bold; font-size: 11pt;">SIGNATURES</span><br />
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      <div style="text-align: center;"> <span style="font-family: Arial;"><br />
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      <div style="text-align: left;"><span style="font-family: Arial; font-size: 9pt;">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><br />
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                <div style="text-align: left; font-family: Arial; font-size: 9pt; font-weight: bold;">Knight-Swift Transportation Holdings Inc.</div>
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                <div style="text-align: left; font-family: Arial; font-size: 9pt;">(Registrant)</div>
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                <div style="text-align: left; font-family: Arial; font-size: 9pt;">Date: February 9, 2022</div>
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                <div style="text-align: left; font-family: Arial; font-size: 9pt;">/s/ Adam W. Miller</div>
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                <div style="text-align: left; font-family: Arial; font-size: 9pt;">Adam W. Miller</div>
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                <div style="text-align: left; font-family: Arial; font-size: 9pt;">Chief Financial Officer</div>
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{"company-data": {"conformed-name": "Knight-Swift Transportation Holdings Inc.", "cik": "0001492691", "assigned-sic": "4213", "irs-number": "205589597", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-35007", "film-number": "22607866"}, "business-address": {"street1": "2200 SOUTH 75TH AVENUE", "city": "PHOENIX", "state": "AZ", "zip": "85043", "phone": "602-269-9700"}, "mail-address": {"street1": "2200 SOUTH 75TH AVENUE", "city": "PHOENIX", "state": "AZ", "zip": "85043"}, "former-company": [{"former-conformed-name": "SWIFT TRANSPORTATION Co", "date-changed": "20110512"}, {"former-conformed-name": "SWIFT TRANSPORTATION CO", "date-changed": "20101209"}, {"former-conformed-name": "SWIFT TRANSPORTATION Co", "date-changed": "20101129"}]}
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):
February 3, 2022
Knight-Swift Transportation Holdings Inc.
(Exact name of registrant as specified in its charter)
Delaware
001-35007
20-5589597
(State or other jurisdiction of incorporation)
(Commission File Number)
(IRS Employer Identification No.)
2002 West Wahalla Lane
Phoenix
,
Arizona
85027
(Address of principal executive offices and zip code)
(
602
)
269-2000
(Registrant's telephone number, including area code)
N/A
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K 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 $0.01 Par Value
KNX
New York Stock Exchange
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or
        Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
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 13(a) of the Exchange Act.
☐
ITEM 5.03
AMENDMENTS TO ARTICLES OF INCORPORATION OR BYLAWS; CHANGE IN FISCAL YEAR
Effective February 3, 2022, the Board of Directors (the "Board") of Knight-Swift Transportation Holdings Inc., a Delaware corporation (the
        "Company"), approved the Fourth Amended and Restated By-laws of the Company to eliminate the supermajority requirement for a stockholder amendment to the Company's By-laws and replace it with a simple majority voting standard. The Board approved
        the amendment in response to a stockholder proposal to eliminate all supermajority voting requirements in the Company's Certificate of Incorporation and By-laws, which was approved by stockholders at the Company's 2021 Annual Meeting of
        Stockholders.
This description is qualified in its entirety by reference to the text of the Company's Fourth Amended and Restated By-Laws, which are
        attached as Exhibit 3.1 to this Current Report on Form 8-K.
ITEM 9.01
FINANCIAL STATEMENTS AND EXHIBITS
(d) Exhibits
Exhibit
Description
Exhibit 3.1
Fourth Amended and Restated By-laws of Knight-Swift Transportation Holdings Inc.
Exhibit 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.
Knight-Swift Transportation Holdings Inc.
(Registrant)
Date: February 9, 2022
/s/ Adam W. Miller
Adam W. Miller
Chief Financial Officer