Amendment: SEC Form SCHEDULE 13D/A filed by Brookfield Business Corporation

Item 4 of the original Schedule 13D is hereby supplemented as follows: On November 6, 2025, BBU, BBUC and 1559985 B.C. Ltd. entered into an arrangement agreement pursuant to which, among other things, the parties agreed to implement an arrangement (the "Arrangement") to simplify BBU's and BBUC's corporate structure by converting BBU and BBUC into a single publicly traded corporate entity (the "Corporation"). The Arrangement will be implemented pursuant to a court-approved plan of arrangement under the Business Corporations Act (British Columbia), and completion of the Arrangement is subject to a number of conditions, including BBU and BBUC security holder approvals and approval by the British Columbia Supreme Court. A special meeting of BBU unitholders and a special meeting of BBUC shareholders have been called for January 13, 2026, and security holders of record as of close of business on November 25, 2025 will be entitled to vote at the meetings. Pursuant to the Arrangement, all BBU limited partnership units, BBUC Class A Shares and redemption-exchange units of Brookfield Business L.P. ("Holding LP") will be exchanged for newly issued class A shares of the Corporation ("Corporation Class A Shares") on a one-for-one basis. In addition, the special limited partnership units of Holding LP, which are held by a subsidiary of Brookfield Asset Management Ltd., will be exchanged for special non-voting incentive shares of the Corporation ("Corporation Special Shares") on a one-for-one basis. BN will also exchange its share of Brookfield Business Partners Limited, the general partner of BBU, for class B multiple voting shares of the Corporation ("Corporation Class B Shares"). The newly issued Corporation Class A Shares are expected to be listed on the Toronto Stock Exchange and New York Stock Exchange. Following completion of the Arrangement, BN, BNT and their respective subsidiaries and related parties are expected to own 142,552,877 Corporation Class A Shares, representing 67.8% of the issued and outstanding Corporation Class A Shares, 4 Corporation Class B Shares, representing 100% of all issued and outstanding Corporation Class B Shares, and 4 Corporation Special Shares, representing 100% of all issued and outstanding Corporation Special Shares. Further information regarding the Arrangement will be contained in a joint management information circular of BBU and BBUC. Subject to the receipt of all required approvals, it is anticipated that the Arrangement will be completed in the first quarter of 2026. The foregoing description of the Arrangement does not purport to be complete and is qualified in its entirety by reference to the full text of the arrangement agreement, dated November 6, 2025, a copy of which was filed as Exhibit 99.1 to the Issuer's Form 6-K filed with the Securities and Exchange Commission on November 6, 2025 and incorporated herein by reference.

Item 5(a) - (c) of the original Schedule 13D is hereby amended and restated as follows: (a)-(b) The information relating to the beneficial ownership of the Class A Shares by each of the Reporting Persons set forth in Rows 7 through 13 of the cover pages hereto is incorporated by reference herein. The percentage of Class A Shares of the Issuer is based on an aggregate number of Class A Shares of 69,996,738 outstanding as of November 6, 2025, and includes (as applicable) Class A Shares beneficially owned by wholly-owned subsidiaries of BNT as described in Item 4 of Amendment No. 1 and subject to the voting arrangements described in Item 4 of Amendment No. 1.

Item 5(b) of Schedule 13D is hereby amended and restated as follows: The information set forth in Item 5(a) of this Schedule 13D is hereby incorporated herein by reference.

Item 5(c) of Schedule 13D is hereby amended and restated as follows: Other than the transactions described in Item 4 herein, there have been no transactions by the Reporting Persons in the Class A Shares since Amendment No. 3 to the Schedule 13D was filed on September 29, 2025.

Item 6 of the original Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 4 of this Amendment No. 4 is hereby incorporated by reference. Upon completion of the Arrangement, the registration rights agreement dated March 15, 2022 between BBU, BBUC and BN and the amended and restated rights agreement dated December 23, 2024 between BN and Wilmington Trust, National Association will automatically terminate. Upon completion of the Arrangement, the voting agreement dated September 26, 2024 between BN and BNT is expected be amended to provide that all decisions to be made with respect to the voting of the Corporation Class A Shares held by subsidiaries of BNT will be made jointly by mutual agreement of the applicable BNT subsidiary and BN, other than with respect to any Corporation Class A Shares subject to financing arrangements between the applicable BNT subsidiary and wholly-owned subsidiaries of BN.

Item 7 of the original Schedule 13D is hereby amended and supplemented as follows: Exhibit 99.1 Arrangement Agreement, dated November 6, 2025 (filed as Exhibit 99.1 to the Issuer's Form 6-K on November 6, 2025, and incorporated herein by reference).