<SUBMISSION>
<SECRELEASE-DATETIME>		20230209-135127	 ⇐ Metadata from SEC Info (ET)
<SECWEBSITE-DATETIME>		20230209-135124	 ⇐ Metadata from SEC Info (ET)
<ACCEPTANCE-DATETIME>		20230209-135103	 ⇐ Filing accepted by SEC (ET)
<ACCESSION-NUMBER>		0001127602-23-004147
<TYPE>				4
<PUBLIC-DOCUMENT-COUNT>		1
<PERIOD>			20230206
<FILING-DATE>			20230209
<DATE-OF-FILING-DATE-CHANGE>	20230209

<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>		GALLAGHER J PATRICK JR
<CIK>				0001186006
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>			4
<ACT>				34
<FILE-NUMBER>			001-09761
<FILM-NUMBER>			23605387
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>			C/O ARTHUR J. GALLAGHER & CO.
<STREET2>			TWO PIERCE PLACE
<CITY>				ITASCA
<STATE>				IL
<ZIP>				60143
</MAIL-ADDRESS>
</REPORTING-OWNER>

<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>		Arthur J. Gallagher & Co.
<CIK>				0000354190
<ASSIGNED-SIC>			6411
<IRS-NUMBER>			362151613  ⇒ 36-2151613 or 362-15-1613
<STATE-OF-INCORPORATION>	IL
<FISCAL-YEAR-END>		1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>			2850 GOLF ROAD
<CITY>				ROLLING MEADOWS
<STATE>				IL
<ZIP>				60008-4050
<PHONE>				630-773-3800
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>			2850 GOLF ROAD
<CITY>				ROLLING MEADOWS
<STATE>				IL
<ZIP>				60008-4050
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>		ARTHUR J. GALLAGHER & CO.
<DATE-CHANGED>			20190819
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>		GALLAGHER ARTHUR J & CO
<DATE-CHANGED>			19920703
</FORMER-COMPANY>
</ISSUER>

<DOCUMENT>
<TYPE>		4
<SEQUENCE>	1
<FILENAME>	form4.xml
<DESCRIPTION>	PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
       Show <XML>: 288 lines (widest: 154 characters) - 11K bytes  
</TEXT>
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</SUBMISSION>