Exhibit 99.1

FORM 4 CONTINUATION SHEET — JOINT FILER INFORMATION

This Form 4 is filed jointly by Ares Corporate Opportunities Fund III, L.P., ACOF Operating Manager III, LLC, Ares Management LLC and Ares Partners Management Company LLC (collectively, the “Ares Entities”). The principal business address of each of the Ares Entities is c/o Ares Management LLC, 2000 Avenue of the Stars, 12th Floor, Los Angeles, California 90067.

Name of Designated Filer: Ares Corporate Opportunities Fund III, L.P.

Date of Event Requiring Statement: March 8, 2011

Issuer Name and Ticker or Trading Symbol: LyondellBasell Industries N.V. (LYB)

IN WITNESS WHEREOF, the undersigned hereby attach their signatures to this Exhibit 99.1 to the Statement of Form 4 as of March 10, 2011.

ARES CORPORATE OPPORTUNITIES FUND III, L.P.
BY:  ACOF OPERATING MANAGER III, LLC
Its Manager
	By:	/s/Michael D. Weiner
	Name:	Michael D. Weiner
	Title:	Authorized Signatory
ARES OPERATING MANAGER III, LLC
By:	/s/Michael D. Weiner
Name:	Michael D. Weiner
Title:	Authorized Signatory
ARES MANAGEMENT LLC
By:	/s/Michael D. Weiner
Name:	Michael D. Weiner
Title:	Authorized Signatory
ARES PARTNERS MANAGEMENT COMPANY LLC
By:	/s/Michael D. Weiner
Name:	Michael D. Weiner
Title:	Authorized Signatory