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 January 2026

CommissionFile Number: 001-37775

BROOKFIELDBUSINESS PARTNERS L.P.

(Translation of registrant’s name into English)

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 ¨

EXHIBIT LIST

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 L.P.

REPORT OF VOTING RESULTS

Special Meeting of Unitholders

January 13, 2026

National Instrument 51-102 – Section 11.3 (Canada)

A special meeting of unitholders of Brookfield Business Partners L.P. (the “Partnership”) was held on Tuesday, January 13, 2026 at 10:00 a.m. (Toronto time) (the “Meeting”). At the Meeting, unitholders holding 78,301,665 limited partnership units (“units”), representing 88.30% of the Corporation’s 88,675,931 issued and outstanding units on the record date for the Meeting, were represented in person or by proxy. Capitalized terms used herein but not otherwise defined have the meanings given to such terms in the management information circular of the Partnership dated November 26, 2025 (the “Circular”).

The following is a summary of the votes cast by holders of the units represented at the Meeting.

BBU Transaction Resolutions

The Transaction Resolutions, which include both the BBU Arrangement Resolution and BBU LPA Amendment Resolution as set out in the Circular as Appendix B, were approved by a simple majority of the outstanding units. In accordance with the BBU Limited Partnership Agreement, each unit was entitled to one vote.

Management received the following proxies from the holders of units on the BBU Arrangement Resolution:

Management received the following proxies from the holders of units on the BBU LPA Amendment Resolution:

Other Business

There were no other matters coming before the Meeting that required a vote by the unitholders.

[Remainder of page intentionally leftblank]

Dated: January 13, 2026