Use of non-GAAP measures This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP. Slide 12 Slide 13: Avient 2024 sales Slide 14: Color, Additives & Inks Slide 15: Specialty Engineered Materials Slide 16: Avient 2024 regional sales, by end market Slide 17: Raw material basket Slide 18: Reconciliation of Non-GAAP financial measures (UNAUDITED) Slide 19: Reconciliation of Non-GAAP financial measures (UNAUDITED) Slide 20: Reconciliation of Non-GAAP financial measures (UNAUDITED)

In alcuni casi, alcuni soggetti non possono considerarsi funzionari o non possono essere trattati come tali dai loro governi, ma rientrano comunque nella definizione di funzionario pubblico riportata sopra. Avient non consente la creazione o l’utilizzo di conti “fuori bilancio” o “fondi neri”. Le voci fuorvianti, incomplete o false nei libri e nei registri di Avient non sono mai accettabili.

Non-Return Valve and Screw Tip 

Non-Phthalate Plastisol Formulations

Non-toxic formulations with low volatile organic compounds (VOC) and without added plasticizers

Non-yellowing, no discoloration or hazing

Non-phthalate pigments available

PowerPoint Presentation M E D I C A L C O N N E C T O R S • Ongoing production with no change to regular set up • Excellent processing and demolding performance • Color stability during processing • Excellent chemical and impact resistance • Enabled efficient ongoing production rates without changing any processing parameters • Safeguarded color stability and transparency during processing for optimal aesthetics • Ensured regulatory requirements for biocompatible ISO109931 and FDA were met • Provided a solution effective across a range of high-temperature polymers, including PEEK, PPSU, PES, PSU, PEI, LCP, and PPS Colorant Chromatics Evoluscend non- PFAS* high-temperature polymer mold release additive KEY REQUIREMENTS WHY AVIENT AVIENT SOLUTION PRODUCTIVITY + REGULATORY LEARN MORE ELECTRICAL COMPONENT OEM (*) A non-PFAS additive manufactured without non-intentionally added (NIA) PFAS or PTFE. (*) manufactured without intentionally added PFAS and without PTFE (1) refers to sulfone products only https://www.avient.com/products/polymer-additives/processing-enhancement-additives/colorant-chromatics-evoluscend-non-pfas-high-temperature-mold-release-additive Slide Number 1

Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include adjusted EPS, adjusted operating income, adjusted gross margin and adjusted EBITDA. Below is a reconciliation of these non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

DARK PLATINUM - NON FDA ABS FR GRAY ABS FR RED