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MARSH & MCLENNAN COMPANIES, INC.

For the period ended Sep 30, 2025. Filed Oct 16, 2025.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Oct 16, 2025

MRSH$204.37-0.2%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

See the whole filing, with its images and exhibits

Item 6. EXHIBITS

See the Exhibit Index immediately following the signature page of this report, which is incorporated herein by reference.

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 thereunto duly authorized.

Date:October 16, 2025/s/ Mark C. McGivney
Mark C. McGivney
Chief Financial Officer
Date:October 16, 2025/s/ Stacy M. Mills
Stacy M. Mills
Vice President & Controller
(Chief Accounting Officer)

EXHIBIT INDEX

Exhibit No.Exhibit Name
31.1Rule 13a-14(a)/15d-14(a) Certification of Chief Executive Officer
31.2Rule 13a-14(a)/15d-14(a) Certification of Chief Financial Officer
32.1Section 1350 Certifications
101.INSXBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCHXBRL Taxonomy Extension Schema
101.CALXBRL Taxonomy Extension Calculation Linkbase
101.DEFXBRL Taxonomy Extension Definition Linkbase
101.LABXBRL Taxonomy Extension Label Linkbase
101.PREXBRL Taxonomy Extension Presentation Linkbase
104Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.