Exhibit 99.1

Joint Filing Agreement

THIS JOINT FILING AGREEMENT is entered into as of August 30, 2018, by and among the parties hereto. The undersigned hereby agree that the Statement on Schedule 13D with respect to the common stock, par value $0.01 per share, of GGP Inc., a Delaware corporation, and any amendment thereafter signed by each of the undersigned shall be (unless otherwise determined by the undersigned) filed on behalf of each of the undersigned pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: August 30, 2018	BROOKFIELD ASSET MANAGEMENT INC.
	By:	/s/ Aleks Novakovic
		Name: Aleks Novakovic
		Title: Managing Partner
Dated: August 30, 2018	PARTNERS LIMITED
	By:	/s/ Brian Lawson
		Name: Brian Lawson
		Title: President
Dated: August 30, 2018	BPG HOLDINGS GROUP INC.
	By:	/s/ Sujoy Gupta
		Name: Sujoy Gupta
		Title: Vice President
Dated: August 30, 2018	BPG HOLDINGS GROUP (US) HOLDINGS INC.
	By:	/s/ Sujoy Gupta
		Name: Sujoy Gupta
		Title: Vice President
Dated: August 30, 2018	BROOKFIELD ASSET MANAGEMENT PRIVATE INSTITUTIONAL CAPITAL ADVISER US, LLC
	By:	/s/ Murray Goldfarb
		Name: Murray Goldfarb
		Title: Managing Partner
Dated: August 30, 2018	BROOKFIELD HOLDINGS CANADA INC.
	By:	/s/ A.J. Silber
		Name: A.J. Silber
		Title: Vice President
Dated: August 30, 2018	BROOKFIELD PROPERTY PARTNERS LIMITED
	By:	/s/ Jane Sheere
		Name: Jane Sheere
		Title: Secretary

Dated: August 30, 2018	BROOKFIELD PROPERTY PARTNERS L.P.
	By:	Brookfield Property Partners Limited, its general partner
	By:	/s/ Jane Sheere
		Name: Jane Sheere
		Title: Secretary

Dated: August 30, 2018	BROOKFIELD PROPERTY L.P.
	By:	Brookfield Property Partners L.P., its managing general partner
	By:	Brookfield Property Partners Limited, its general partner
	By:	/s/ Jane Sheere
		Name: Jane Sheere
		Title: Secretary
Dated: August 30, 2018	BROOKFIELD BPY HOLDINGS INC.
	By:	/s/ Allen Yi
		Name: Allen Yi
		Title: Assistant Secretary

Dated: August 30, 2018	BROOKFIELD BPY RETAIL HOLDINGS I LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD BPY RETAIL HOLDINGS II LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD RETAIL HOLDINGS VII LLC
	By:	Brookfield Asset Management Private Institutional Capital Adviser US, LLC, its manager
	By:	/s/ Murray Goldfarb
		Name: Murray Goldfarb
		Title: Managing Partner

Dated: August 30, 2018	BROOKFIELD RETAIL HOLDINGS WARRANTS LLC
	By:	Brookfield Asset Management Private Institutional Capital Adviser US, LLC, its managing member
	By:	/s/ Murray Goldfarb
		Name: Murray Goldfarb
		Title: Managing Partner
Dated: August 30, 2018	BROOKFIELD BPY RETAIL HOLDINGS III LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD RETAIL HOLDINGS II SUB III LLC
	By:	Brookfield Asset Management Private Institutional Capital Adviser US, LLC, its managing member
	By:	/s/ Murray Goldfarb
		Name: Murray Goldfarb
		Title: Managing Partner

Dated: August 30, 2018	BW PURCHASER, LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD US HOLDINGS INC.
	By:	/s/ A.J. Silber
		Name: A.J. Silber
		Title: Vice President

Dated: August 30, 2018	BROOKFIELD US CORPORATION
	By:	/s/ Josh Zinn
		Name: Josh Zinn
		Title: Vice President
Dated: August 30, 2018	BUSC FINANCE LLC
	By:	/s/ Josh Zinn
		Name: Josh Zinn
		Title: Vice President
Dated: August 30, 2018	BROOKFIELD BPY RETAIL HOLDINGS II SUBCO LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD OFFICE PROPERTIES INC.
	By:	/s/ Keith Hyde
		Name: Keith Hyde
		Title: Vice President, Taxation
Dated: August 30, 2018	1706065 ALBERTA ULC
	By:	/s/ Keith Hyde
		Name: Keith Hyde
		Title: Vice President, Taxation

Dated: August 30, 2018	BROOKFIELD HOLDING LIMITED LIABILITY COMPANY
	By:	/s/ Dr. László Csontos
		Name: Dr. László Csontos
		Title: Managing Director
	By:	/s/ Eamonn John O’Dea
		Name: Eamonn John O’Dea
		Title: Managing Partner
Dated: August 30, 2018	BP US REIT LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BOP (US) LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD PROPERTIES SUBCO LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD PROPERTY GROUP LLC
	By:	/s/ Murray Goldfarb
		Name: Murray Goldfarb
		Title: Managing Partner

Dated: August 30, 2018	BPY CANADA SUBHOLDINGS 1 ULC
	By:	/s/ Keith Hyde
		Name: Keith Hyde
		Title: President
Dated: August 30, 2018	BROOKFIELD PROPERTY SPLIT CORP.
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Secretary
Dated: August 30, 2018	BPY RETAIL V LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD PROPERTIES INVESTOR LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BROOKFIELD BFP HOLDINGS LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President and Secretary
Dated: August 30, 2018	BPGH SUB INC.
	By:	/s/ Sujoy Gupta
		Name: Sujoy Gupta
		Title: Vice President
Dated: August 30, 2018	BPR FIN II LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President
Dated: August 30, 2018	BROOKFIELD RETAIL HOLDINGS VII SUB 3 LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President
Dated: August 30, 2018	BPR FIN I SUBCO LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President

Dated: August 30, 2018	BPR HOLDING REIT I LLC
	By:	/s/ Michelle L. Campbell
		Name: Michelle L. Campbell
		Title: Senior Vice President