| Interim Dividend ..50c announced/presentation scheduled.. Sept  17 
        HOUSTON,        Sept. 10, 2013 /PRNewswire/ -- LyondellBasell (NYSE: LYB) today        announced that Sergey Vasnetsov, Senior Vice President, Strategic        Planning and Transactions, will address investors at the Credit Suisse        26th Annual Chemical and Agricultural Science Conference in New York on        Tuesday, Sept. 17.         | LyondellBasell            to Address Credit Suisse Chemical and Agricultural Science Conference |  
 Webcast Access:
 
 A live webcast can be        accessed at www.lyondellbasell.com/investorpresentations on Sept. 17        beginning at 1:15 p.m. ET. The webcast will be provided in Flash and        Windows Media formats.
 
 A webcast replay will be available after 6        p.m. ET Sept. 17 until Sept. 24 at 11 p.m. ET on the LyondellBasell        website at www.lyondellbasell.com/investorpresentations.
 
 Additional        Information:
 
 Slides related to the webcast will be available        within the Investor Relations section of the company's website:        www.lyondellbasell.com/investorpresentations.
 
 Related Disclosures:
 
 Required        reconciliations of certain non-GAAP financial measures to GAAP financial        measures and any other applicable disclosures (including the slides)        will be available at the time of the presentations and afterwards at        www.lyondellbasell.com/investorpresentations.
 
 LyondellBasell        (NYSE: LYB) is one of the world's largest plastics, chemical and        refining companies and a member of the S&P 500. LyondellBasell        (www.lyondellbasell.com) manufactures products at 58 sites in 18        countries. LyondellBasell products and technologies are used to make        items that improve the quality of life for people around the world        including packaging, electronics, automotive parts, home furnishings,        construction materials and biofuels.
 
 SOURCE LyondellBasell        Industries
 
 /CONTACT: Media, David A. Harpole, +1 713-309-4125 or        Investors, Douglas J. Pike, +1 713-309-7141
 
 /Web site:        lyondellbasell.com
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