Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. WHAT WE DO: MATERIAL SCIENCE 5 CUSTOM FORMULATION FE BRUARY 1 5 , 2023 W EB CAS T Q4 2022 VS. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 32 EV / 2023E EBITDA Historic Multiple 6.5 8.3 10.0 15.6 13.9 13.7 12.8 9.5 18.0 17.5 12.3 10.2 9.7 8.8 8.4 5.9 (2 01 1) (2 01 8) RA W M AT ER IA L OVE RV IE W 34 RAW MATERIAL 2022 ANNUAL PURCHASES Performance Additives 16% Pigments TiO2 Dyestuffs 2% Polyethylene Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 30% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials Excludes Avient Protective Materials SEGMENT DATA U.S. & Canada 40% 37% 18% Latin America 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Building and END MARKET REVENUE (1) Total company adjusted EBITDA of $592M includes corporate costs $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M 36 C O L O R , A D D I T I V E S & I N K S 2022 REVENUE | $2 .4 B ILL ION US & Canada 34% 38% Latin America END MARKET REGION 37 34% 21% Building & 1% Energy 2% S P E C I A LT Y E N G I N E E R E D M AT E R I A L S 2022 PRO FORMA REVENUE | $1 .3 B ILL ION END MARKET US & Canada 52% 35% REGION 38 19% 8%Industrial 16% Building & 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 27% 14% 17% Building & (37% of sales)Transportation Building & US & Canada (40% of sales) 7% 56% 23% 7% Building & 1% LATAM (5% of sales) 3% 39

1 3 4

STAN-TONE DB-34822 CT 022 GREEN 3 SILVER GREY UV 4% X GT-6755-1D

X LB-1058-1A TAN SP X TX76383#SR-01084-0001-3: Blue Glow COOL GREY 4 COATED

GILMOUR® A Q U A A R M O R T M L I G H T W E I G H T H O S E • Lightweight • Improved kink resistance and flexibility • Soft yet durable solution for consumer appeal • Shelf differentiation • Drinking water safe • Met all requirements with a custom TPE solution, enabling Gilmour to produce a more compact hose about 50% lighter than standard PVC hoses • Incorporated custom colorants for brand consistency, and specialty additives for enhanced UV and abrasion resistance • Delivered a single-material solution for easier manufacturing, and supplied materials locally to align with customer’s “Made in the USA” brand • Provided regulatory and technical support to product development Customized Versaflex™ TPE KEY REQUIREMENTS WHY AVIENT?

X GV 40834#SR-02514-0003-10 Pink N NEUTRAL 4 GRAY Q710-1-4 PC

INVESTOR DAY O R L A N D O , F L O R I D A | M A Y 2 0 1 8 FORWARD LOOKING STATEMENTS PolyOne Corporation 2 In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. PolyOne Corporation 3 FACTORS THAT COULD CAUSE ACTUAL RESULTS TO DIFFER MATERIALLY FROM THOSE IMPLIED BY THESE FORWARD-LOOKING STATEMENTS INCLUDE, BUT ARE NOT LIMITED TO: USE OF NON-GAAP MEASURES PolyOne Corporation 4 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. I N V E S T O R D A Y A G E N D A M A Y 1 0 , 2 0 1 8 PolyOne Corporation 5 8:00 WELCOME BREAKFAST 9:00 Introduction: Bob Patterson 9:45 Investing for Growth: Michael Garratt Commercial Resources Innovation Service 10:15 SEGMENT REVIEWS PolyOne Distribution: Scott Horn Specialty Engineered Materials: Michael Garratt BREAK (10 MINUTES) SEGMENT REVIEWS (CONTINUED) Performance Products & Solutions: Don Wiseman Color, Additives & Inks: Mark Crist 11:40 Mergers & Acquisitions: Joel Rathbun 12:00 Financial Review: Brad Richardson 12:20 Conclusion/Q&A: Bob Patterson 1:00 LUNCH Bradley C.

X PK-1482306 Natural X PK-1482307 Natural GREY 4 PET COOL 3

SWEET GOLD SWIRL F 3 X HC 182753#SR-21700 Magenta Conc 4% X GT-20459-1E

X ET115138#SR-06788 Bullard Red conc 4% UV PQ-COOL GRAY 9C #3 X HC 136128#SR-07000 Cool Gray