LyondellBasell Q3 Report 2023

Record quarterly EBITDA for Intermediates & Derivatives.

Successful startup of our propylene oxide and oxyfuels plants.

OLEFINS & POLYOLEFINS – AMERICAS: Margin compressed by higher feedstock costs and lower polymer pricing
vs. 2Q23.

OLEFINS & POLYOLEFINS – EUROPE, ASIA & INTERNATIONAL: Lower integrated margins with continued weak demand. Stable energy costs. NEAR-TERM OUTLOOK: Modest polymer price increases offsetting higher feedstock and energy costs. NEAR-TERM OUTLOOK:Strengthening polyethylene pricing with stable domestic volume and
continued export strength.

INTERMEDIATES & DERIVATIVES:  Oxyfuels margins far above historical levels due to industry downtime. New propylene oxide capacity largely offset by planned maintenance
and idled LYB propylene oxide and styrene monomer (PO/SM) capacity.

ADVANCED POLYMER SOLUTIONS: Lower demand from automotive market driven by 3Q23 downtime
at automotive OEMs and impact from the U.S. United Auto Workers (UAW) strike.

TECHNOLOGY: Higher licensing revenue with achievement of contract milestones. Improved catalyst volumes and sales mix.