Three Months Ended June 30, 2023 Three Months Ended June 30, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 $ 62.8 $ 0.68 Special items, after tax 19.6 0.21 3.2 0.03 Amortization expense, after-tax 16.2 0.18 $ 10.5 $ 0.12 Adjusted net income / EPS $ 57.9 $ 0.63 $ 76.5 $ 0.83 Three Months Ended June 30, Six Months Ended June 30, Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 2023 2022 Net income from continuing operations – GAAP $ 22.3 $ 62.8 $ 43.6 $ 127.5 Income tax expense 10.4 22.7 18.1 42.7 Interest expense, net 29.4 16.2 58.2 33.1 Depreciation and amortization 47.6 36.5 98.1 74.3 EBITDA from continuing operations $ 109.7 $ 138.2 $ 218.0 $ 277.6 Special items, before tax 21.7 0.9 49.0 7.6 Depreciation and amortization included in special items (0.1) (1.1) (1.9) (3.2) Adjusted EBITDA $ 131.3 $ 138.0 $ 265.1 $ 282.0 Pro forma APM adjustments — 34.3 — 66.3 Pro forma adjusted EBITDA $ 131.3 $ 172.3 $ 265.1 $ 348.3 Pro forma adjusted EBITDA as a % of sales 15.9 % 17.4 % 15.9 % 17.6 % 1 AVNT Q2 2023 Earnings Presentation 7.26.23 IR Deck - AVNT-2023.06.30 7.24 1217PM non GAAP attachment Attachment

TOY GUN BRAND S C O P E • Excellent surface appearance • Low shrink performance • Reduce carbon emissions • Competitive price • Delivered good dimensional stability with a low water absorption level • Offered better performance and surface finish without visible fibers as compared with normal glass fiber-filled PA6 and PA66 • Formulated with 20-30% bio-based content, offering low product carbon footprint values to help meet the customers’ sustainability goal Customized Nymax™ BIO Bio-based Polyamide Solutions KEY REQUIREMENTS WHY AVIENT?

Excelite OnePager Putty Knife PUTTY KNIFE MANUFACTURER N O R T H A M E R I C A • Reduce current scrap rate of 30% • Eliminate prominent sink marks • Minimize random short shots • Reduced scrap rate to 1% • Eliminated sink marks • Improved mold fill • Improvement in cell structure increased cell density and dimensional stability during critical cooling time Excelite™ IM Chemical Foaming Additives KEY REQUIREMENTS* WHY AVIENT?

AVIENT SOLUTION SWIMMING GEAR BRAND S W I M G O G G L E G A S K E T A N D N O S E B R I D G E • Bio-content material • Good adhesion to PC • Flexible and comfortable to wear • Easy to process • Customized formulations for a transparent Shore 43A TPE with 40% bio-based content for the gasket and a natural 57A TPE with 30% bio-based content for the nose bridge to meet sustainability and comfort targets • Delivered excellent performance in order to pass strict chlorine, brine, and QUV tests • Offered prompt development and on-site technical services to accelerate commercialization KEY REQUIREMENTS SUSTAINABILITY + SEALING LEARN MORE reSoundTM BIO Thermoplastic Elastomers Copyright © 2022, Avient Corporation.

S M A L L A P P L I A N C E O E M C O F F E E M A C H I N E S E A L • Soft durometers • Good bonding to ABS • Good flowability for easy processing • Excellent sealing property • Formulated a 30 Shore A TPE with excellent peel force performance to meet the sealing requirements • Offered a short lead time and on-site technical service to speed up the time to market • Provided fast global collaboration between regions, supporting the brand’s design team in Europe and molders in Asia Custom VersaflexTM Formulation KEY REQUIREMENTS WHY AVIENT?

CONTAINER OEM S T O C K T A N K • Reduce container weight • Optimize throughput and provide internal training to sustain processing optimization • Minimize scrap • Improve surface appearance • Deployed an experienced field technician who was able to reduce tank weight by 30% through processing adjustments • Provided an additional lightweighting opportunity with an optimized gas / chemical foaming agent (CFA) process • Trained customer on CFA processing and collaborated to create a new CFA offering for further optimization • Made adjustments resulting in lower scrap rates and improved part appearance Dedicated Onsite Field Technical Service KEY REQUIREMENTS WHY AVIENT?

Ltd. 30, Hsing Pang Road 33068 Taoyuan Taiwan Scope Design and manufacture of colour and additive concentrates and specialty compounds for the Healthcare and Medical device market.

FITNESS SMARTWATCH BRAND S M A R T W A T C H H O U S I N G • Reduce carbon footprint at least 30% by using bio-based material • Meet physical properties requirements such as impact strength, UV resistance, and thermal resistance • Provide small lot quantity for various colors • Offered bio-based colorants to support carbon footprint reduction • Maintained over 80% of mechanical properties of materials and passed QSUN & QUV test • Offered supply flexibilities in low volume for a high mix of colors OnColor Bio Colorants KEY REQUIREMENTS WHY AVIENT?

No. 0562.01) 11/30/2023 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 AVIENT CORPORATION 733 East Water Street North Baltimore, OH 45872 Claire Holman Phone: (419) 257-1327 MECHANICAL Valid To: October 31, 2025 Certificate Number: 0562.01 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following automotive plastics tests: Test Method: Test Name: ASTM D412 Tensile ASTM D523 Specular Gloss ASTM D618 (A) Conditioning of Plastics ASTM D624 (Die C) Tear Strength ASTM D638 Tensile Properties ASTM D792 (A) Density and Specific Gravity by Displacement ASTM D1004 Initial Tear Resistance ASTM D1203 (A) Volatile Loss ASTM D1895 (A) Apparent Density, Bulk Factor, Pourability ASTM D1921 Particle Size (Sieve Analysis) ASTM D2240 Durometer Hardness (Shore A and D) ASTM E1331 Color by Spectrophotometry Using Hemispherical Geometry FMVSS 571.302 Flammability FORD BN-102-01 (A) Low Temperature Flexibility FORD BO-131-03 Interior Odor ISO 3795 Determination of Burning Behavior of Interior Materials SAE J323 (A) Cold Cracking (Mandrel Bend) SAE J1351 Hot Odor for Insulation Materials SAE J1545 Instrumental Color Difference Measurement DOC-058151 Angle of Repose 1 Laboratory Developed Method For the tests to which this accreditation applies, please refer to the laboratory’s Mechanical Scope of Accreditation.

Glass-filled polyketone (PK) formulations (10-30%) offer a nylon alternative with excellent chemical resistance, high temperature performance, and good wear resistance