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    SEC Form DEFA14A filed by Arthur J. Gallagher & Co.

    3/23/26 4:38:55 PM ET
    $AJG
    Specialty Insurers
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    Get the next $AJG alert in real time by email
    DEFA14A 1 a2026ajgna.htm DEFA14A Document

    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549
    SCHEDULE 14A
    (Rule 14a-101)
    Information Required In Proxy Statement
    SCHEDULE 14A INFORMATION
    Proxy Statement Pursuant to Section 14(a) of the
    Securities Exchange Act of 1934
    (Amendment No. __ )
    Filed by the Registrant x   Filed by a Party other than the Registrant ☐
    Check the appropriate box:
    oPreliminary Proxy Statement
    oConfidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
    oDefinitive Proxy Statement
    xDefinitive Additional Materials
    oSoliciting Material Pursuant to §240.14a-12
    ARTHUR J. GALLAGHER & CO.
    (Name of Registrant as Specified In Its Charter)
    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
    Payment of Filing Fee (Check all boxes that apply):
    xNo fee required.
    oFee paid previously with preliminary materials.
    o
    Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.



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