X0306 4 2017-12-29 0 0001489393 LyondellBasell Industries N.V. LYB 0001509925 ALTEP 2010 L.P. C/O AI ALTEP HOLDINGS, INC. 730 FIFTH AVENUE, 20TH FL NEW YORK NY 10019 0 0 0 1 Affiliate of 10% Owner 0001513440 ALTEP 2011 L.P. C/O AI ALTEP HOLDINGS, INC. 730 FIFTH AVENUE, 20TH FL NEW YORK NY 10019 0 0 0 1 Affiliate of 10% Owner Ordinary Shares 2017-12-29 4 J 0 169946 D 74028 D Ordinary Shares 2017-12-29 4 J 0 77366 D 74754 D Reflects distribution of ordinary shares pursuant to an internal reorganization. The securities reported are held directly by Altep 2010 L.P. ("Altep 2010"). Each of the reporting persons (other than Altep 2010) disclaims beneficial ownership of these securities, and this Form shall not be construed as an admission that any such reporting person is the beneficial owner of any such securities. The securities reported are held directly by Altep 2011 L.P. ("Altep 2011"). Each of the reporting persons (other than Altep 2011) disclaims beneficial ownership of these securities, and this Form shall not be construed as an admission that any such reporting person is the beneficial owner of any such securities. /s/ Alejandro Moreno for Altep 2010 L.P. 2018-01-03 /s/ Alejandro Moreno for Altep 2011 L.P. 2018-01-03