144 0001508237 XXXXXXXX LIVE 0001489393 LyondellBasell Industries N.V. 001-34726 2800 Post Oak Blvd. Suite 5100 Houston TX 77056 713-309-7200 AI Investments Holdings LLC Affiliate of a 10% stockholder Ordinary Shares Tourmaline Partners, LLC

680 Washington Boulevard 10th Floor Stamford CT 06901

842 56262.44 322169978 03/09/2026 NYSE Ordinary shares 08/29/2019 Purchase of ordinary shares Open market transactions N 98583 08/29/2019 N/A Ordinary shares 09/03/2019 Purchase of ordinary shares Open market transactions N 665918 09/03/2019 N/A Ordinary shares 11/01/2022 Purchase of ordinary shares Open market transactions N 4000 11/01/2022 N/A Y 03/09/2026 Langhorne S. Perrow