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Strong past performance demonstrates that our strategy and execution are working • Megatrends align with our strengths • Innovation and services provide differentiation, incremental pricing power, and competitive advantage • Strong and proven management team driving growth and performance • Addressable market exceeds $40 billion Page 14 1 Schedule I Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data) Below is a reconciliation of non-GAAP financial measures to the most directly comparable measures calculated and presented in accordance with U.S. Reconciliation to Condensed Consolidated Balance Sheets 2013 Short-term debt and current portion of long-term debt $ 12.7 Long-term debt 976.2 Less cash and cash equivalents (365.2) Net debt $ 623.7 Adjusted EBITDA 2013 Income before income taxes $ 151.0 Interest expense, net 63.5 Depreciation and amortization 108.8 Special items in EBITDA 31.7 Adjusted EBITDA $ 355.0 2 Platform sales and operating income (OI) 2006Y* 2013Y Global Specialty Engineered Materials sales $ 345.3 $ 615.5 Global Color, Additives and Inks sales 531.8 852.3 Designed Structures and Solutions sales - 597.4 Specialty Platform sales 877.1 2,065.2 Performance Products and Solutions sales 1,166.2 773.2 PolyOne Distribution sales 732.8 1,075.2 Corporate and eliminations (153.7) (142.4) Total sales $ 2,622.4 $ 3,771.2 Global Specialty Engineered Materials OI $ 3.9 $ 57.2 Global Color, Additives and Inks OI 8.9 104.0 Designed Structures & Solutions OI - 33.4 Specialty Platform OI 12.8 194.6 Performance Products and Solutions OI 64.2 56.0 PolyOne Distribution OI 19.2 63.3 Sunbelt Joint Venture OI 102.9 - Corporate and eliminations (4.6) (52.4) Special items in OI 39.1 (30.0) Operating income GAAP 233.6 231.5 Sunbelt equity income (107.0) - Special items in OI (39.1) 30.0 Adjusted operating income $ 87.5 $ 261.5 Global Specialty Engineered Materials - OI % of sales 1.1% 9.3% Global Color, Additives and Inks - OI % of sales 1.7% 12.2% Designed Structures & Solutions - OI % of sales - 5.6% Specialty platform OI - % of sales 1.5% 9.4% PP&S operating OI - % of sales 5.5% 7.2% Distribution OI - % of sales 2.6% 5.9% PolyOne OI adjusted - % of sales 3.3% 6.9% * Historical results include the Resin and Specialty Coatings businesses within the Performance Products and Solutions segment. Gabelli Non-GAAP.pdf Section 1

Mevopur pre-colored specialty materials are available in a wide range of polymer families. NOTE: On July 1, 2020, PolyOne and Clariant Masterbatches joined together as Avient, a new kind of materials company focused on conquering customer challenges and unlocking the potential for innovation and sustainability around the globe. Media contact Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation +1 440-930-1988 michelle.maniscalco@avient.com  

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Available in masterbatch pellets, powder form or liquid, they utilize endothermic, exothermic or an endothermic/ exothermic blend of chemistries to fit the required applications. Product Name Material/ Product Code Type Initiation Temp, C Optimum Gas Yield Temp, C Gas Yield Range, cc/g Uses/ Applications Usage Resins POWDER Hydrocerol BIH PEAUFF Endo 140 160 140–150 • Weight reduction • Sink mark removal • Warpage reduction EVA, polyethylene, PE copolymers, TPEs/TPOs, PVC Hydrocerol Compound EMASAD Endo 140 200 135–145 • Weight reduction • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM, PVC Hydrocerol HK EMA0766025 Endo 200 210 135–145 • Weight reduction • Sink mark removal • Warpage reduction Polypropylene, styrenes, acrylics, polyamides Hydrocerol 1480 EMA0766027 Endo-Exo 140 180 240–259 • Weight reduction • Sink mark removal • Warpage reduction EVA, polyethylenes, PE copolymers, TPEs/TPOs, styrenes, acrylics, PVC Product Name Material/ Product Code Type Initiation Temp, C Optimum Gas Yield Temp, C Gas Yield Range, cc/g Uses/ Applications Usage Resins MASTERBATCH Hydrocerol 862 PLASAD Endo 140 160 10–20 • Sink mark removal • Warpage reduction EVA, polyethylene, PE compolymers, TPOs/TPEs Hydrocerol BIH-40-E PLASAF Endo 140 160 55–65 • Weight reduction • Sink mark removal • Warpage reduction EVA, polyethylene, PE compolymers, TPOs/TPEs Hydrocerol 1004 PEAUFQ Endo 140 160 80–90 • Weight reduction EVA, polyethylene, PE compolymers, TPOs/TPEs Hydrocerol CF-5-E PEASCF Endo 140 200 5–10 • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM Hydrocerol 1602 PRASAD Endo 140 200 50–60 • Weight reduction • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM Hydrocerol PEA0820021 PEA0820021 Endo 140 200 25–35 • Weight reduction • Sink mark removal • Warpage reduction Styrenes Hydrocerol PEA08200095 PEA0820095 Endo-Exo 140 180 100–120 • Weight reduction • Sink mark removal • Warpage reduction PVC Hydrocerol ITP-820 PRAN698588 Endo 200 210 5–10 • Sink mark removal • Warpage reduction EVA, polyethylene, PE copolymers, TPEs/TPOs, PVC Hydrocerol HK-40-E PLASAH Endo 200 210 55–65 • Weight reduction • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM, PVC Hydrocerol CT-3205-B OMA0698633 Endo 200 210 50–60 • Weight reduction • Sink mark removal • Warpage reduction PLA Hydrocerol 1135 PEAN698616 Exo 170 190 20–30 • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM Hydrocerol 8418M PHA0698418 Exo 170 190 50–60 • Weight reduction • Sink mark removal • Warpage reduction Polyethylene, polypropylene, TPEs/TPOs, styrenes, acrylics, TPUs, POM Product Name Material/ Product Code Type Initiation Temp, C Optimum Gas Yield Temp, C Gas Yield Range, cc/g Uses/ Applications Usage Resins MASTERBATCH Hydrocerol 141 PEASCH Exo 200 210 10–20 • Sink mark removal • Warpage reduction Polypropylene, styrenes, acrylics, polyamides Hydrocerol 1191 PRAN698433 Exo 200 210 55–65 • Weight reduction • Sink mark removal • Warpage reduction Polypropylene, styrenes, acrylics, polyamides Hydrocerol NBA0820012 NBA0820012 Exo 240 260 25–35 • Weight reduction • Sink mark removal • Warpage reduction Polyesters, high-temperature resins Hydrocerol XH-901 SAASCC Exo 240 260 30–40 • Weight reduction • Sink mark removal • Warpage reduction Polycarbonate blends, polycarbonate, high-temperature resins Hydrocerol 1376-4 PRAN698541 Endo-Exo 200 210 90–100 • Weight reduction • Sink mark removal • Warpage reduction Polypropylene, styrenes, acrylics, polyamides, PVC LIQUID Excelite FA-37 CC10212522 Endo-Exo 120 140 65–75 • Weight reduction/ WPC Polyethylene Excelite PF-1 CC01053625 Endo-Exo 120 140 55–65 • Weight reduction Vinyl Excelite FA-185 CC10303252 Endo 140 200 75–85 • Weight reduction • Direct gas assist Polyolefin Excelite Foam PPRO CC10250288 Endo 160 200 50–60 • Weight reduction • Warpage reduction Polypropylene Excelite FA-77 CC10232527 Endo-Exo 120 140 85–95 • Weight reduction/ WPC Polyethylene Excelite FA-108 CC10290626 Endo 180 200 55–65 • Weight reduction • Sink mark removal Polyolefin Excelite FA-112 CC10313065 Endo 140 200 50-60 • Weight reduction • Sink mark removal Polyolefin 1.844.4AVIENT www.avient.com Copyright © 2022, Avient Corporation.

Consider combining comfort with color and performance properties using enhanced soft touch GLS™ TPE materials for even better results. Impactful Color: TPEs can be customized with bright colors and special effects such as glimmers, sparkles and pearlescents, as well as shine levels such as eye-catching high gloss, which conveys a high-tech, high-fashion aesthetic. TPEs play an important role in this evolution by enabling designers to add ergonomic grips in appealing textures and colors.

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SUZHOU, China – June 1, 2023 – Today, Avient Corporation will exhibit its broad range of specialty and sustainable colorants and additives, thermo June 1, 2023 Colorants and Additives from Avient for Sustainable Luxury Plastic Packaging to be Featured at LUXE PACK New York

We’ve seen growth in demand for medical manikins and training models, putting, manufacturers under constant pressure to differentiate and find ways to quickly introduce innovative new products,” said James Petrie, marketing director, PolyOne Color and Additives. Collaborative Custom Color Expertise – Enables manufacturers to offer realistic training experiences by creating custom-tailored skin tones; thermochromatic technology enables model to change color in response to heat or cold, simulating hypothermia, fever or burns; can also be used to design distinguishable looks to drive brand equity Media contacts Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com