世邦魏理仕美股招股说明书(2025-11-07版)

(To prospectus dated December19, 2023) We are offering $750,000,000 aggregate principal amount of 4.900% Senior Notes due 2033 (the “notes”). We will pay interest on the notes semi-annually in arrears on January15 and July15 of each year, beginning July15, 2026. The notes will mature on January15, 2033. We may redeem the notes, in whole or in part, at any time or from time to time at the redemption prices described under the heading “Description of the Notes—OptionalRedemption” in this prospectus supplement. Upon the occurrence of a Change of Control Triggering Event (as defined in this prospectus supplement), we may berequired to offer to purchase the notes from the holders thereof as described under the caption “Description of the Notes—Change of Control Triggering Event.” As of the issue date of the notes, the notes will be fully and unconditionally guaranteed on a senior unsecured basis by CBRE Group, Inc. (“Parent”). After the issue date,certain of our subsidiaries will be required to fully and unconditionally guarantee the notes on a senior unsecured basis if such subsidiaries guarantee other of ourindebtedness above a specified amount (such of our subsidiaries that guarantee the notes, collectively with Parent, the “guarantors”). See “Description of the Notes—Certain Covenants—Future Guarantors.” The notes and related guarantees (the “guarantees”) will be our and our guarantors’ general unsecured senior obligations andrank equally in right of payment with our and our guarantors’ existing and future unsecured senior indebtedness. The notes and related guarantees will be effectivelysubordinated to all of our and our guarantors’ secured debt to the extent of the value of the assets securing such debt and structurally subordinated to all of the existingand future liabilities of our subsidiaries that do not guarantee the notes. None of our subsidiaries will guarantee the notes as of their issue date. The notes are a new issue of securities with no established trading market. We do not intend to apply to list the notes on any securities exchange or include the notes inany automated quotation system. Investing in the notes involves risks that are described in the section titled “Risk Factors” beginning on page S-12 of this prospectussupplement. (1)Plus accrued interest, if any, from November13, 2025, if settlement occurs after that date. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the notes or related guarantees ordetermined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense. The notes will be ready for delivery in book-entry form only through the facilities of The Depository Trust Company for the accounts of its participants, includingEuroclear Bank S.A./N.V., as operator of the Euroclear System, and Clearstream Banking,société anonyme, on or about November13, 2025, which is the fifth businessday following the date of this prospectus supplement. Joint Book-Running Managers Citigroup INGCBRE USBancorpStandardCharteredBank Table of Contents You should rely only on the information contained in or incorporated by reference in this prospectus supplement, in the accompanyingprospectus and in any free writing prospectus filed by us with the Securities and Exchange Commission (the “SEC”). We have not, and theunderwriters have not, authorized any other person to provide you with any different information. If anyone provides you with different orinconsistent information, you should not rely on it. You should not assume that the information contained or incorporated by reference in thisprospectus supplement, in the accompanying prospectus or in any such free writing prospectus is accurate as of any date other than theirrespective dates. Our business, financial condition, results of operations and prospectus may have changed since those dates. TABLE OF CONTENTS Prospectus Supplement About this Prospectus SupplementForward-Looking StatementsWhere You Can Find More InformationSummaryRisk FactorsUse of ProceedsCapitalizationDescription of the NotesCertain United States Federal Income Tax ConsiderationsUnderwriting (Conflicts of Interest)Legal MattersExperts Prospectus About this ProspectusWhere You Can Find More InformationForward Looking StatementsThe CompanyRisk FactorsUse of ProceedsGeneral Description of Securities That May Be SoldDescription of the Debt SecuritiesDescription of Preferred Stock Description of Depositary Shares Legal Matters Table of Contents ABOUT THIS PROSPECTUS SUPPLEMENT This document consists of two parts. The first part is this prospectus supplement, which describes the specific terms of this offering, the notes andmatters relating to us and our financial performance and condition. The second part is the accompanying prospectus, which provides a more generaldescription of the terms and conditions of the various