1 FIRST QUARTER 2021 EARNINGS April 30, 2021 CAUTIONARY STATEMENT AND INFORMATION RELATED TO FINANCIAL MEASURES CAUTIONARY STATEMENT The statements in this presentation relating to matters that are not historical facts are forward-looking statements. These forward-looking statements are based upon assumptions of management of LyondellBasell which are believed to be reasonable at the time made and are subject to significant risks and uncertainties. When used in this presentation, the words "estimate," "belie ...