<SEC-DOCUMENT>0001784277-24-000007.txt : 20240911
<SEC-HEADER>0001784277-24-000007.hdr.sgml : 20240911
<ACCEPTANCE-DATETIME>20240911181312
ACCESSION NUMBER:		0001784277-24-000007
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240911
DATE AS OF CHANGE:		20240911

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Arthur J. Gallagher & Co.
		CENTRAL INDEX KEY:			0000354190
		STANDARD INDUSTRIAL CLASSIFICATION:	INSURANCE AGENTS BROKERS & SERVICES [6411]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				362151613
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-09761
		FILM NUMBER:		241293488

	BUSINESS ADDRESS:	
		STREET 1:		2850 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008-4050
		BUSINESS PHONE:		630-773-3800

	MAIL ADDRESS:	
		STREET 1:		2850 GOLF ROAD
		CITY:			ROLLING MEADOWS
		STATE:			IL
		ZIP:			60008-4050

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARTHUR J. GALLAGHER & CO.
		DATE OF NAME CHANGE:	20190819

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GALLAGHER ARTHUR J & CO
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Matrix Trust Co
		CENTRAL INDEX KEY:			0001784277
		ORGANIZATION NAME:           	
		IRS NUMBER:				753182674
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		144

	BUSINESS ADDRESS:	
		STREET 1:		717 17TH STREET
		STREET 2:		SUITE 1300
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
		BUSINESS PHONE:		866-935-6824

	MAIL ADDRESS:	
		STREET 1:		717 17TH STREET
		STREET 2:		SUITE 1300
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
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  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001784277</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000354190</issuerCik>
      <issuerName>Arthur J. Gallagher &amp; Co.</issuerName>
      <secFileNumber>001-09761</secFileNumber>
      <issuerAddress>
        <com:street1>2850 GOLF ROAD</com:street1>
        <com:city>ROLLING MEADOWS</com:city>
        <com:stateOrCountry>IL</com:stateOrCountry>
        <com:zipCode>60008-4050</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>630-773-3800</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Matrix Trust Co</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Trustee for the Arthur J Gallagher Rabbi Trust</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Pershing LLC</name>
        <address>
          <com:street1>One Pershing Plaza</com:street1>
          <com:city>Jersey City</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07399</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>15000</noOfUnitsSold>
      <aggregateMarketValue>4484100.00</aggregateMarketValue>
      <noOfUnitsOutstanding>219100000</noOfUnitsOutstanding>
      <approxSaleDate>09/09/2024</approxSaleDate>
      <securitiesExchangeName>Nasdaq Stock Market</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>01/01/2012</acquiredDate>
      <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Open Market</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>15000</amountOfSecuritiesAcquired>
      <paymentDate>01/01/2012</paymentDate>
      <natureOfPayment>Cash at time of purchase</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/04/2024</saleDate>
      <amountOfSecuritiesSold>449</amountOfSecuritiesSold>
      <grossProceeds>114508.07</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/06/2024</saleDate>
      <amountOfSecuritiesSold>1369</amountOfSecuritiesSold>
      <grossProceeds>345753.10</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/18/2024</saleDate>
      <amountOfSecuritiesSold>13264</amountOfSecuritiesSold>
      <grossProceeds>3491150.88</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/24/2024</saleDate>
      <amountOfSecuritiesSold>1289</amountOfSecuritiesSold>
      <grossProceeds>341870.29</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>06/28/2024</saleDate>
      <amountOfSecuritiesSold>120</amountOfSecuritiesSold>
      <grossProceeds>31201.39</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/11/2024</saleDate>
      <amountOfSecuritiesSold>3016</amountOfSecuritiesSold>
      <grossProceeds>808018.22</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/23/2024</saleDate>
      <amountOfSecuritiesSold>8</amountOfSecuritiesSold>
      <grossProceeds>2193.75</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/24/2024</saleDate>
      <amountOfSecuritiesSold>7</amountOfSecuritiesSold>
      <grossProceeds>1908.26</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/25/2024</saleDate>
      <amountOfSecuritiesSold>132</amountOfSecuritiesSold>
      <grossProceeds>36412.17</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/29/2024</saleDate>
      <amountOfSecuritiesSold>532</amountOfSecuritiesSold>
      <grossProceeds>149118.16</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/30/2024</saleDate>
      <amountOfSecuritiesSold>120</amountOfSecuritiesSold>
      <grossProceeds>34136.15</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>07/31/2024</saleDate>
      <amountOfSecuritiesSold>1001</amountOfSecuritiesSold>
      <grossProceeds>285967.13</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/01/2024</saleDate>
      <amountOfSecuritiesSold>3299</amountOfSecuritiesSold>
      <grossProceeds>937882.26</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/05/2024</saleDate>
      <amountOfSecuritiesSold>1441</amountOfSecuritiesSold>
      <grossProceeds>410717.24</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/06/2024</saleDate>
      <amountOfSecuritiesSold>87</amountOfSecuritiesSold>
      <grossProceeds>24576.59</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/09/2024</saleDate>
      <amountOfSecuritiesSold>71</amountOfSecuritiesSold>
      <grossProceeds>20069.54</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/13/2024</saleDate>
      <amountOfSecuritiesSold>44</amountOfSecuritiesSold>
      <grossProceeds>12384.22</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/20/2024</saleDate>
      <amountOfSecuritiesSold>183</amountOfSecuritiesSold>
      <grossProceeds>52678.28</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/21/2024</saleDate>
      <amountOfSecuritiesSold>795</amountOfSecuritiesSold>
      <grossProceeds>230184.96</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/22/2024</saleDate>
      <amountOfSecuritiesSold>195</amountOfSecuritiesSold>
      <grossProceeds>56571.33</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>08/26/2024</saleDate>
      <amountOfSecuritiesSold>1067</amountOfSecuritiesSold>
      <grossProceeds>306619.31</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>Matrix Trust Company</name>
        <address>
          <com:street1>2800 N Central Ave</com:street1>
          <com:street2>Suite 900</com:street2>
          <com:city>Phoenix</com:city>
          <com:stateOrCountry>AZ</com:stateOrCountry>
          <com:zipCode>85004</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>09/04/2024</saleDate>
      <amountOfSecuritiesSold>181</amountOfSecuritiesSold>
      <grossProceeds>53387.63</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>It is anticipated that sales covered by this form will be made within the period beginning 9/12/2024 and ending 12/11/2024</remarks>
    <noticeSignature>
      <noticeDate>09/11/2024</noticeDate>
      <signature>Eric Simpson</signature>
    </noticeSignature>
  </formData>
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</DOCUMENT>
</SEC-DOCUMENT>
