UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2018

Commission File Number: 001-35505

BROOKFIELD PROPERTY PARTNERS L.P.

(Exact name of registrant as specified in its charter)

73 Front Street, Hamilton, HM 12 Bermuda

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x           Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

The information contained in Exhibits 99.1 of this Form 6-K is incorporated by reference into the registrant’s following registration statements on Form F-3: File Nos. 333-218503 and 333-218504 and on Form S-8: Files Nos. 333-203042 and 333-196622.

EXPLANATORY NOTE

On March 26, 2018, Brookfield Property Partners L.P. (“BPY”), GGP Inc. (“GGP”), and Goldfinch Merger Sub Corp., an indirect, wholly owned subsidiary of BPY, entered into an Agreement and Plan of Merger (as amended from time to time, in accordance with its terms, the “Merger Agreement”). Pursuant to the Merger Agreement, BPY has agreed to acquire GGP through a series of transactions (the “Transactions”).

On May 2, 2018, BPY and GGP filed a joint proxy statement/prospectus on Form F-4/S-4 (the “Registration Statement”) for the purpose of registering BPY limited partnership units and certain other securities issuable to existing GGP stockholders in connection with the Transactions. On June 11, 2018, BPY and GGP filed an amendment to the Registration Statement (“Amendment No. 1”).

The unaudited pro forma condensed consolidated financial statements for BPY disclosed in Amendment No. 1 is being furnished to the Commission under cover of this Form 6-K pursuant to the attached Exhibit 99.1. This information is being furnished by BPY under cover of this Form 6-K solely to fulfill its obligation under Rules 13a-16 and 12b-20 under the Securities Exchange Act of 1934, as amended.

We caution you that the following disclosures are current only as of the date hereof and are subject to change pending the closing of the Transactions.

DOCUMENTS FILED AS PART OF THIS FORM 6-K

See the Exhibit List to this Form 6-K.

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Additional Information and Where to Find It

This communication is being made in respect of the proposed Transactions contemplated by the Agreement and Plan of Merger, dated as of March 26, 2018, among BPY, Goldfinch Merger Sub Corp. and GGP. This communication may be deemed to be solicitation material in respect of the proposed Transactions involving BPY and GGP. In connection with the proposed Transactions, on May 2, 2018, BPY filed with the U.S. Securities and Exchange Commission (the “SEC”) a registration statement on Form F-4 that includes a prospectus of BPY (the “BPY prospectus”), and GGP filed with the SEC a registration statement on Form S-4 that includes a proxy statement/prospectus of GGP (the “GGP proxy statement/prospectus”). The parties also filed on May 2, 2018 a Rule 13E-3 transaction statement on Schedule 13E-3. On June 11, 2018, the parties filed Amendment No. 1 to the registration statements and Amendment No. 1 to the Schedule 13E-3. The registration statements have not yet become effective. Each of BPY and GGP may also file other documents with the SEC regarding the proposed Transactions. This communication is not a substitute for the BPY prospectus, the GGP proxy statement/prospectus, the registration statements or any other document which BPY or GGP may file with the SEC. The GGP proxy statement/prospectus, when in definitive form, will be mailed to GGP stockholders in connection with the proposed Transactions. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE ABOVE-REFERENCED AND OTHER RELEVANT DOCUMENTS FILED OR TO BE FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THESE DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY CONTAIN OR WILL CONTAIN IMPORTANT INFORMATION ABOUT BPY, GGP, THE PROPOSED TRANSACTIONS AND RELATED MATTERS. Investors and stockholders may obtain free copies of the above-referenced and other documents filed with the SEC by BPY and GGP, when available, through the SEC’s website at http://www.sec.gov. In addition, investors may obtain free copies of the above-referenced and other documents filed with the SEC by BPY, when available, by contacting BPY Investor Relations at bpy.enquiries@brookfield.com or +1 (855) 212-8243 or at BPY’s website at bpy.brookfield.com, and are able to obtain free copies of the above-referenced and other documents filed with the SEC by GGP, when available, by contacting GGP Investor Relations at (312) 960-5000 or at GGP’s website at http://www.ggp.com.

Non-Solicitation

This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the U.S. Securities Act of 1933, as amended.

Participants in Solicitation

BPY, GGP and their respective directors and executive officers and other persons may be deemed to be participants in the solicitation of proxies from GGP stockholders in respect of the proposed Transactions that is described in the BPY prospectus and the GGP proxy statement/prospectus. Information regarding the persons who may, under the rules of the SEC, be deemed participants in the solicitation of proxies from GGP stockholders in connection with the proposed Transactions, including a description of their direct or indirect interests, by security holdings or otherwise, is set forth in the BPY prospectus and the GGP proxy statement/prospectus. You may also obtain the documents that BPY and GGP file electronically free of charge from the SEC’s website at http://www.sec.gov. Information regarding BPY’s directors and executive officers is contained in BPY’s 2017 Annual Report on Form 20-F filed with the SEC on March 9, 2018. Information regarding GGP’s directors and executive officers is contained in GGP’s 2017 Annual Report on Form 10-K filed with the SEC on February 22, 2018 and its 2018 Annual Proxy Statement on Schedule 14A filed with the SEC on April 27, 2018.

Forward-Looking Statements

This communication contains “forward-looking information” within the meaning of Canadian provincial securities laws and applicable regulations and “forward-looking statements” within the meaning of “safe harbor” provisions of applicable U.S. securities laws. Forward-looking statements include statements that are predictive in nature or depend upon or refer to future events or conditions, include statements regarding the expected timing, completion and effects of the proposed Transactions, our operations, business, financial condition, expected financial results, performance, prospects, opportunities, priorities, targets, goals, ongoing objectives, strategies and outlook, as well as the outlook for North American and international economies for the current fiscal year and subsequent periods, and include words such as “expects,” “anticipates,” “plans,” “believes,” “estimates,” “seeks,” “intends,” “targets,” “projects,” “forecasts,” “likely,” or negative versions thereof and other similar expressions, or future or conditional verbs such as “may,” “will,” “should,” “would” and “could.”

Although we believe that our anticipated future results, performance or achievements expressed or implied by the forward-looking statements and information are based upon reasonable assumptions and expectations, the reader should not place undue reliance on forward-looking statements and information because they involve known and unknown risks, uncertainties and other factors, many of which are beyond our control, which may cause our actual results, performance or achievements to differ materially from anticipated future results, performance or achievement expressed or implied by such forward-looking statements and information.

Factors that could cause actual results to differ materially from those contemplated or implied by forward-looking statements include, but are not limited to: the occurrence of any event, change or other circumstance that could affect the proposed transaction on the anticipated terms and timing, including the risk that the proposed Transactions may not be consummated; risks related to BPY’s ability to integrate GGP’s business into our own and the ability of the combined company to attain expected benefits therefrom; risks incidental to the ownership and operation of real estate properties including local real estate conditions; the impact or unanticipated impact of general economic, political and market factors in the countries in which we do business; the ability to enter into new leases or renew leases on favorable terms; business competition; dependence on tenants’ financial condition; the use of debt to finance our business; the behavior of financial markets, including fluctuations in interest and foreign exchange rates; uncertainties of real estate development or redevelopment; global equity and capital markets and the availability of equity and debt financing and refinancing within these markets; risks relating to our insurance coverage; the possible impact of international conflicts and other developments including terrorist acts; potential environmental liabilities; changes in tax laws and other tax related risks; dependence on management personnel; illiquidity of investments; the ability to complete and effectively integrate other acquisitions into existing operations and the ability to attain expected benefits therefrom; operational and reputational risks; catastrophic events, such as earthquakes and hurricanes; and other risks and factors detailed from time to time in our documents filed with the securities regulators in Canada and the United States.

We caution that the foregoing list of important factors that may affect future results is not exhaustive. When relying on our forward-looking statements or information, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statements or information, whether written or oral, that may be as a result of new information, future events or otherwise.