UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Amendment No. 2)

Under the Securities Exchange Act of 1934

Burger King Worldwide, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

121220107

(CUSIP Number)

Jill Granat

Senior Vice President, General Counsel and Secretary

Burger King Worldwide, Inc.

5505 Blue Lagoon Drive

Miami, Florida 33133

(305) 378-3000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

With a copy to:

William B. Sorabella, Esq.

Joshua N. Korff, Esq.

Kirkland & Ellis LLP

601 Lexington Avenue

New York, NY 10022

(212) 446-4800

December 12, 2014

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

The following constitutes Amendment No. 2 to the Schedule 13D filed by the undersigned (“Amendment No. 2”). This Amendment No. 2 amends the Schedule 13D as specifically set forth herein.

Item 4 is hereby amended and supplemented as follows:

On December 12, 2014, Blue Merger Sub, Inc., a corporation incorporated under the laws of Delaware (“Merger Sub”), merged with and into the Issuer (the “Merger”) pursuant to an Arrangement Agreement and Plan of Merger (the “Arrangement Agreement”) by and among Tim Hortons Inc. (“Tim Hortons”), the Issuer, Restaurant Brands International Inc., a corporation continued under the laws of Canada (f/k/a 1011773 B.C. Unlimited Liability Company and 9060669 Canada Inc.) (“Holdings”), Restaurant Brands International Limited Partnership, a limited partnership organized under the laws of Ontario and wholly owned subsidiary of Holdings (f/k/a New Red Canada Partnership and New Red Canada Limited Partnership) (“Partnership”), Merger Sub, and 8997900 Canada Inc., a corporation organized under the laws of Canada and a wholly owned subsidiary of Partnership.

Upon consummation of the Merger, the separate corporate existence of Merger Sub ceased, and the Issuer continued as the surviving corporation and as an indirect subsidiary of both Holdings and Partnership. Upon consummation of the Merger, each share of the Issuer’s common stock outstanding immediately prior to the effective time of the Merger was converted into the right to receive, if no Exchangeable Election (as described below) had been made with respect to such common stock, 0.99 newly issued Holdings common shares and 0.01 newly issued Partnership exchangeable units.

A stockholder of the Issuer was also allowed to make an election to receive consideration solely in the form of Partnership exchangeable units (an “Exchangeable Election”), which entitled such stockholder to receive one Partnership exchangeable unit in exchange for each share of the Issuer’s common stock, subject to proration as described in the Arrangement Agreement. Pursuant to a Voting Agreement, dated as of August 26, 2014, by and between 3G Special Situations Fund II, L.P. and Tim Hortons, 3G Special Situations Fund II, L.P. made an Exchangeable Election in connection with the Merger with respect to all of its shares of Burger King Worldwide common stock.

Item 5 is hereby amended and supplemented by deleting it in its entirety and replacing it with the following:

On December 12, 2014, all of the shares of common stock of the Issuer held of record by the Reporting Persons were cancelled and converted into the right to receive one Partnership exchangeable unit pursuant to and upon the closing of the Merger. Following such cancellation and conversion into the right to receive such Partnership exchangeable units, none of the Reporting Persons holds any shares of common stock of the Issuer.

(a) See the information contained on the cover pages to this Amendment No. 2 to Schedule 13D which is incorporated herein by reference.

(b) See the information contained on the cover pages to this Amendment No. 2 to Schedule 13D which is incorporated herein by reference.

(c) There have been no reportable transactions with respect to the Common Stock of the Issuer within the last 60 days by the Reporting Persons, except as described in this Amendment No. 2 to Schedule 13D.

(d) Not applicable.

(e) December 12, 2014.

SIGNATURES

After reasonable inquiry and to the best of each of the undersigned’s knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Date: December 17, 2014