<SEC-DOCUMENT>0001784277-23-000003.txt : 20230530
<SEC-HEADER>0001784277-23-000003.hdr.sgml : 20230530
<ACCEPTANCE-DATETIME>20230530183043
ACCESSION NUMBER:		0001784277-23-000003
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230530
DATE AS OF CHANGE:		20230530

SUBJECT COMPANY:	

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

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-09761
		FILM NUMBER:		23978302

	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
		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 AJG 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>3057150.00</aggregateMarketValue>
      <noOfUnitsOutstanding>214246000</noOfUnitsOutstanding>
      <approxSaleDate>05/30/2023</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>02/23/2023</saleDate>
      <amountOfSecuritiesSold>127</amountOfSecuritiesSold>
      <grossProceeds>23744.68</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>02/28/2023</saleDate>
      <amountOfSecuritiesSold>655</amountOfSecuritiesSold>
      <grossProceeds>122083.88</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>03/02/2023</saleDate>
      <amountOfSecuritiesSold>678</amountOfSecuritiesSold>
      <grossProceeds>126258.03</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>03/07/2023</saleDate>
      <amountOfSecuritiesSold>9</amountOfSecuritiesSold>
      <grossProceeds>1702.40</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>03/08/2023</saleDate>
      <amountOfSecuritiesSold>35</amountOfSecuritiesSold>
      <grossProceeds>6645.30</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>03/30/2023</saleDate>
      <amountOfSecuritiesSold>300</amountOfSecuritiesSold>
      <grossProceeds>54163.81</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>03/29/2023</saleDate>
      <amountOfSecuritiesSold>165</amountOfSecuritiesSold>
      <grossProceeds>31006.97</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>04/04/2023</saleDate>
      <amountOfSecuritiesSold>20881</amountOfSecuritiesSold>
      <grossProceeds>4025954.04</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>04/06/2023</saleDate>
      <amountOfSecuritiesSold>388</amountOfSecuritiesSold>
      <grossProceeds>76067.70</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>04/12/2023</saleDate>
      <amountOfSecuritiesSold>361</amountOfSecuritiesSold>
      <grossProceeds>71538.43</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>04/14/2023</saleDate>
      <amountOfSecuritiesSold>364</amountOfSecuritiesSold>
      <grossProceeds>72583.74</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>04/17/2023</saleDate>
      <amountOfSecuritiesSold>441</amountOfSecuritiesSold>
      <grossProceeds>88854.26</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>04/19/2023</saleDate>
      <amountOfSecuritiesSold>243</amountOfSecuritiesSold>
      <grossProceeds>50072.70</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>04/20/2023</saleDate>
      <amountOfSecuritiesSold>2358</amountOfSecuritiesSold>
      <grossProceeds>488737.56</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>05/05/2023</saleDate>
      <amountOfSecuritiesSold>1235</amountOfSecuritiesSold>
      <grossProceeds>263439.69</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>05/08/2023</saleDate>
      <amountOfSecuritiesSold>9185</amountOfSecuritiesSold>
      <grossProceeds>1975321.31</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>05/11/2023</saleDate>
      <amountOfSecuritiesSold>254</amountOfSecuritiesSold>
      <grossProceeds>55048.33</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>05/12/2023</saleDate>
      <amountOfSecuritiesSold>34</amountOfSecuritiesSold>
      <grossProceeds>7419.19</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>05/18/2023</saleDate>
      <amountOfSecuritiesSold>2319</amountOfSecuritiesSold>
      <grossProceeds>496517.11</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>It is anticipated that sales covered by this form will be made within the period beginning 05/30/2023 and ending 08/28/2023</remarks>
    <noticeSignature>
      <noticeDate>05/30/2023</noticeDate>
      <signature>Eric Simpson</signature>
    </noticeSignature>
  </formData>
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</SEC-DOCUMENT>
