6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

FORM 6-K

REPORTOF FOREIGN PRIVATE ISSUER

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

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Forthe month of September 2023

Commissionfile number 001-37775

BROOKFIELDBUSINESS PARTNERS L.P.

(Exact name of Registrant as specified in itscharter)

73Front Street, 5th Floor

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  ¨

The following document, which is attached as an exhibit hereto, is incorporated by reference herein:

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.

Exhibit 99.1

BROOKFIELD BUSINESS PARTNERS COMPLETES FILINGOF RECAST ANNUAL FINANCIAL STATEMENTS

BROOKFIELD,News, September 26, 2023 – Brookfield Business Partners L.P. (NYSE: BBU; TSX: BBU.UN) (“Brookfield Business Partners”) today announced that it has filed recast audited consolidated financial statements as at December 31, 2022 and 2021 and for each of the three years in the period ended December 31, 2022, together with corresponding management’s discussion and analysis (collectively, the “Recast Financial Statements”). The Recast Financial Statements have been prepared in connection with Brookfield Business Partners’ previously disclosed adoption of IFRS 17, Insurance Contracts.

The Recast Financial Statements supersede and replace in all respects the previously filed annual consolidated financial statements and management’s discussion and analysis of Brookfield Business Partners for such periods.

The Recast Financial Statements are available on Brookfield Business Partners’ website at bbu.brookfield.com, on the U.S. Securities and Exchange Commission’s website at www.sec.gov and on the SEDAR+ website at www.sedarplus.ca. Hard copies of the annual and quarterly reports can be obtained free of charge upon request.

Brookfield BusinessPartners is a global business services and industrials company focused on owning and operating high-quality businesses that provide essential products and services and benefit from a strong competitive position. Investors have flexibility to invest in our company either through Brookfield Business Corporation (NYSE, TSX: BBUC), a corporation, or Brookfield Business Partners L.P. (NYSE: BBU; TSX: BBU.UN), a limited partnership. For more information, please visit https://bbu.brookfield.com.

Brookfield Business Partners is the flagship listed vehicle of Brookfield Asset Management’s Private Equity Group. Brookfield Asset Management is a leading global alternative asset manager with approximately $850 billion of assets under management.

For more information,contact:

CAUTIONARYSTATEMENT REGARDING FORWARD-LOOKING STATEMENTS AND INFORMATION

Note: This newsrelease contains “forward-looking information” within the meaning of Canadian provincial securities laws and “forward-lookingstatements” within the meaning of applicable Canadian and U.S. securities laws, including the United States Private SecuritiesLitigation Reform Act of 1995. Forward-looking statements include statements that are predictive in nature, depend upon or refer to futureevents or conditions, include statements regarding the operations, business, financial condition, expected financial results, performance,prospects, opportunities, priorities, targets, goals, ongoing objectives, strategies and outlook of Brookfield Business Partners, aswell as regarding recently completed and proposed acquisitions, dispositions, and other transactions, and the outlook for North Americanand 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,” “views,” “potential,” “likely” or negative versionsthereof and other similar expressions, or future or conditional verbs such as “may,” “will,” “should,”“would” and “could”.

Although webelieve that our anticipated future results, performance or achievements expressed or implied by the forward-looking statements and informationare based upon reasonable assumptions and expectations, investors and other readers should not place undue reliance on forward-lookingstatements and information because they involve known and unknown risks, uncertainties and other factors, many of which are beyond ourcontrol, which may cause the actual results, performance or achievements of Brookfield Business Partners to differ materially from anticipatedfuture results, performance or achievements expressed or implied by such forward-looking statements and information.

Factors thatcould cause actual results to differ materially from those contemplated or implied by forward-looking statements include, but are notlimited to: general economic conditions and risks relating to the economic, including unfavorable changes in interest rates, foreignexchange rates, inflation and volatility in the financial markets; global equity and capital markets and the availability of equity anddebt financing and refinancing within these markets; strategic actions including our ability to complete dispositions and achieve theanticipated benefits therefrom; the ability to complete and effectively integrate acquisitions into existing operations and the abilityto attain expected benefits; changes in accounting policies and methods used to report financial condition (including uncertainties associatedwith critical accounting assumptions and estimates); the ability to appropriately manage human capital; the effect of applying futureaccounting changes; business competition; operational and reputational risks; technological change; changes in government regulationand legislation within the countries in which we operate; governmental investigations; litigation; changes in tax laws; ability to collectamounts owed; catastrophic events, such as earthquakes, hurricanes and pandemics/epidemics including COVID-19; the possible impact ofinternational conflicts, wars and related developments including Russia’s invasion of Ukraine, terrorist acts and cyber terrorism;and other risks and factors detailed from time to time in our documents filed with the securities regulators in Canada and the UnitedStates including in the “Risk Factors” section in our most recently filed Form 20-F.

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

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