Westlake Growth & Investment Strategy

36 50,000 PEM has a Long History of Strategic & Profitable Growth Key Expansion Events Performance ■ Essential 40,000 30,000 Total Capacity (millions of lbs.) 20,000 10,000 0 1986 | 1987 | 1988 1989 | -15% CAGR 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 • Expanded Ethylene Capacity (2013, 2014, 2016, 2017) Expanded PVC Capacity (2013, 2014, 2019, 2020) Expanded Chlor-Alkali Capacity (2013) Acquired Vinnolit Specialty PVC (2014) Acquired Axiall (2016) Acquired Ethylene Capacity via new cracker JV (2019, 2022) Acquired Hexion Epoxy, expanding product offering and adding new markets (2022) . . Westlake

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