Use of Non-GAAP Measures This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, adjusted operating income, free cash flow and adjusted EBITDA. A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.avient.com.

Non-GAAP Reconciliation Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

L’acheteur doit examiner les produits rapidement après leur réception afin de vérifier s’ils sont endommagés, si des éléments sont manquants, ou s’ils sont non conformes aux garanties du vendeur. Le vendeur ne sera en aucun cas responsable des dommages et/ou des frais attribuables à un retard dans la livraison. Le vendeur n’assume aucune responsabilité pour toute panne des outils ou de l’équipement ou des matériaux de déchargement utilisés par l’acheteur, qu’ils soient ou non fournis par le vendeur. 12.

EPC EPC BARE PERFORMANCE Operating Temperature Range -65°C - 80°C Chemical Resistance P Flame Resistance X UV Resistance P Flex Properties P FEP BARE PERFORMANCE Operating Temperature Range -195°C - 200°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties O EXTRUSION FIBERS PROCESSES PRODUCTS ETFE BARE PERFORMANCE Operating Temperature Range -100°C - 150°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties P HYTREL BARE PERFORMANCE Operating Temperature Range -70°C - 125°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties P ETFE FEP HYTREL FIBER OPTICAL CABLES MOVING HIGH PERFORMANCE FIBERS FORWARD This data is provided for informational purposes only, and does not constitute a specification. PFA PFA BARE PERFORMANCE Operating Temperature Range -200°C - 260°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties P POLYPROPYLENE BARE PERFORMANCE Operating Temperature Range -45°C - 105°C Chemical Resistance P Flame Resistance X UV Resistance P Flex Properties X EXTRUSION FIBERS PROCESSES PRODUCTS POLYETHYLENE BARE PERFORMANCE Operating Temperature Range -65°C - 80°C Chemical Resistance P Flame Resistance X UV Resistance P Flex Properties O POLYURETHANE BARE PERFORMANCE Operating Temperature Range -55°C -125°C Chemical Resistance P Flame Resistance X UV Resistance P Flex Properties P POLYETHYLENE POLYPROPYLENE POLYURETHANE FIBER OPTICAL CABLES MOVING HIGH PERFORMANCE FIBERS FORWARD This data is provided for informational purposes only, and does not constitute a specification. PVC PVC BARE PERFORMANCE Operating Temperature Range -55°C - 105°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties P EXTRUSION FIBERS PROCESSES PRODUCTS PVDF BARE PERFORMANCE Operating Temperature Range -40°C - 140°C Chemical Resistance P Flame Resistance P UV Resistance P Flex Properties P PVDF MOVING HIGH PERFORMANCE FIBERS FORWARD LOCATIONS Headquarters, R&D, Manufacturing FIBER-LINE® LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 fiber@fiber-line.com Manufacturing Operations FIBER-LINE® LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 fiber@fiber-line.com EMEA & Asia Pacific Operations FIBER-LINE® INTERNATIONAL B.V.

MASTERMIX RETARDER PX 4623 PASTE PP FR 8-6 LMS-1000

Use of Non-GAAP Measures This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, adjusted operating income, free cash flow and adjusted EBITDA. A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.avient.com.

Geon(TM) MM498B-2 BLACK NON-PHTHALATE Geon(TM) MM498B-3 WEBFLEX GRAY NON-PHTH PP FR 8-6 LMS-1000

DM691#38 NAVY BLUE NON-PHTHALATE DM691#39 NAVY BLUE NON-PHTHALATE PP FR 8-6 LMS-1000

Geon(TM) DB4760 BLACK NON-PHTHALATE Geon(TM) DB4760 CLEAR NON-PHTHALATE PP FR 8-6 LMS-1000

PP GREEN NON TIO2 V2 PS GREEN NON TIO2 V2 PP FR 8-6 LMS-1000