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. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below. 2023 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income (loss) from continuing operations attributable to Avient shareholders $ 27.8 $ 0.30 $ (17.0) $ (0.19) Special items, after tax (Attachment 3) 5.4 0.06 38.3 0.42 Amortization expense, after-tax 15.0 0.16 14.6 0.16 Adjusted net income / EPS $ 48.2 $ 0.52 $ 35.9 $ 0.39 (1) Per share amounts may not recalculate from figures presented herein due to rounding 2023 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 75.8 $ 0.83 $ 82.8 $ 0.90 Special items, after tax (Attachment 3) 79.3 0.86 116.2 1.26 Amortization expense, after-tax 61.5 0.67 49.0 0.53 Adjusted net income / EPS $ 216.6 $ 2.36 $ 248.0 $ 2.69 (1) Per share amounts may not recalculate from figures presented herein due to rounding 1 Reconciliation to EBITDA and Pro Forma Adjusted EBITDA 2023 2022 2023 2022 Sales - GAAP $ 719.0 $ 790.4 $ 3,142.8 $ 3,396.9 Pro forma APM adjustments — — — 256.1 Pro forma adjusted sales $ 719.0 $ 790.4 $ 3,142.8 $ 3,653.0 Net income (loss) from continuing operations – GAAP $ 27.6 $ (16.6) $ 76.3 $ 83.1 Income tax (benefit) expense (7.0) (60.8) 11.0 (19.3) Interest expense 26.8 49.4 115.3 119.8 Depreciation and amortization from continuing operations 44.2 48.6 188.8 162.5 EBITDA from continuing operations $ 91.6 $ 20.6 $ 391.4 $ 346.1 Special items, before tax 22.4 104.3 114.6 194.0 Interest expense included in special items (0.1) (16.0) (2.3) (26.0) Depreciation and amortization included in special items — (1.5) (1.9) (5.5) Adjusted EBITDA $ 113.9 $ 107.4 $ 501.8 $ 508.6 APM pro forma adjustments - 8 months 2022* — — — 83.1 Pro forma adjusted EBITDA $ 113.9 $ 107.4 $ 501.8 $ 591.7 Pro forma adjusted EBITDA as a percent of sales 15.8 % 13.6 % 16.0 % 16.2 % * Pro forma adjustment for January - August 2022 APM results (period before Avient ownership).

Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies 11.9% 16.3% 2019PF 2022E EBITDA Margins CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORIC SPECIALIZATION THROUGH M&A 13 Distribution DSM Protective BOLT-ON ACQUISITION HISTORY 14 Commercial Resources Operating Income Operating Margins 259 363 $40 $139 Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W SPECIALTY TRANSFORMATION T O D A Y 46% 67% 86% 0% 60% 80% 2005 2010 2019 2021 2022 PF % o f A d ju st ed E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Building & 43% 14% Telecom. 2% 2006 2022 Pro Forma 21% Building & Telecom. END MARKET FOCUS ON LESS CYCLICAL INDUSTRIES 16 14.8% 17.6% 21.0% 2018 2020 2022 PF 1.8% 2006 15.3% 16.2% 17.0% 2018PF 2020PF 2022E CAI 2.7% 2006 SEM SPECIALTY EBITDA MARGIN EXPANSION 17 • Portfolio transformation accelerates growth in less cyclical, higher margin end markets • Investments in our composites platform continue to drive margin expansion (1) (1) (1) 2018 and 2020 financial information is pro forma to include a full year of Clariant Color acquisition PORTFOLIO EVOLUTION OVER THE YEARS 18 Adj. Sales EBITDA Specialty Engineered Materials Color Additives and Inks $585M$3,635M 29 C O L O R , A D D I T I V E S & I N K S 2022 REVENUE | $2 .3 B ILL ION US & Canada Latin America END MARKET REGION 30 33% Building & 1% Energy Figures represent 2022 full year estimates 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 50% REGION 31 Figures represent 2022 full year estimates 19% 8%Industrial 16% Building & 31% 28% Building & 3% 2% Defense (20% of sales) 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 29% 17% Building & (35% of sales) 14% Building & 12% US & Canada (40% of sales) 49% Building & LATAM (5% of sales) 3%Telecommunications Figures represent 2022 full year estimates32

Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies 11.9% 16.3% 2019PF 2022E EBITDA Margins CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORIC SPECIALIZATION THROUGH M&A 13 Distribution DSM Protective BOLT-ON ACQUISITION HISTORY 14 Commercial Resources Operating Income Operating Margins 259 363 $40 $139 Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W SPECIALTY TRANSFORMATION T O D A Y 46% 67% 86% 0% 60% 80% 2005 2010 2019 2021 2022 PF % o f A d ju st ed E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Building & 43% 14% Telecom. 2% 2006 2022 Pro Forma 21% Building & Telecom. END MARKET FOCUS ON LESS CYCLICAL INDUSTRIES 16 14.8% 17.6% 21.0% 2018 2020 2022 PF 1.8% 2006 15.3% 16.2% 17.0% 2018PF 2020PF 2022E CAI 2.7% 2006 SEM SPECIALTY EBITDA MARGIN EXPANSION 17 • Portfolio transformation accelerates growth in less cyclical, higher margin end markets • Investments in our composites platform continue to drive margin expansion (1) (1) (1) 2018 and 2020 financial information is pro forma to include a full year of Clariant Color acquisition PORTFOLIO EVOLUTION OVER THE YEARS 18 Adj. Sales EBITDA Specialty Engineered Materials Color Additives and Inks $585M$3,635M 29 C O L O R , A D D I T I V E S & I N K S 2022 REVENUE | $2 .3 B ILL ION US & Canada Latin America END MARKET REGION 30 33% Building & 1% Energy Figures represent 2022 full year estimates 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 50% REGION 31 Figures represent 2022 full year estimates 19% 8%Industrial 16% Building & 31% 28% Building & 3% 2% Defense (20% of sales) 2022 PROFORMA AVIENT REGIONAL SALES BY END MARKET 29% 17% Building & (35% of sales) 14% Building & 12% US & Canada (40% of sales) 49% Building & LATAM (5% of sales) 3%Telecommunications Figures represent 2022 full year estimates32

Playbook in current environment 1. Executing flawlessly and continue advancing our strategy while prioritizing investments and resources for our growth vectors 1. 2. 3. 4. 5. 6. Color, Additives & Inks END MARKETS REGIONS 34% 21% 15% 11% 8% Packaging Telecom 1%Energy 1% 34% US & Canada Latin America Europe, Middle East Construction 15Copyright © .

TÍTULO DO ESTABELECIMENTO (NOME DE FANTASIA) ******** PORTE DEMAIS CÓDIGO E DESCRIÇÃO DA ATIVIDADE ECONÔMICA PRINCIPAL 20.99-1-99 - Fabricação de outros produtos químicos não especificados anteriormente CÓDIGO E DESCRIÇÃO DAS ATIVIDADES ECONÔMICAS SECUNDÁRIAS 46.79-6-01 - Comércio atacadista de tintas, vernizes e similares 46.84-2-99 - Comércio atacadista de outros produtos químicos e petroquímicos não especificados anteriormente 46.63-0-00 - Comércio atacadista de Máquinas e equipamentos para uso industrial; partes e peças 28.66-6-00 - Fabricação de máquinas e equipamentos para a indústria do plástico, peças e acessórios 82.11-3-00 - Serviços combinados de escritório e apoio administrativo 64.63-8-00 - Outras sociedades de participação, exceto holdings 71.20-1-00 - Testes e análises técnicas 22.29-3-02 - Fabricação de artefatos de material plástico para usos industriais CÓDIGO E DESCRIÇÃO DA NATUREZA JURÍDICA 206-2 - Sociedade Empresária Limitada LOGRADOURO AV FRANCISCO NAKASATO NÚMERO 1700 COMPLEMENTO ******** CEP 13.295-000 BAIRRO/DISTRITO SAO ROQUE DA CHAVE MUNICÍPIO ITUPEVA UF SP ENDEREÇO ELETRÔNICO FABIANA.SILVA@POLYONE.COM TELEFONE (11) 4593-9279/ (11) 4593-9252 ENTE FEDERATIVO RESPONSÁVEL (EFR) ***** SITUAÇÃO CADASTRAL ATIVA DATA DA SITUAÇÃO CADASTRAL 08/04/2005 MOTIVO DE SITUAÇÃO CADASTRAL SITUAÇÃO ESPECIAL ******** DATA DA SITUAÇÃO ESPECIAL ******** Aprovado pela Instrução Normativa RFB nº 1.863, de 27 de dezembro de 2018. Página: 1/1

Administration, Site management, Manufacture, Laboratory, Procurement, 27 Avenida 34–11, Zona 12 1012 Parque Global Guatemala WA-6 Renaissance Industrial & Warehousing Complex, Vashere Maharashtra 400607 India Survey No. 344 / 1–3 Sakarda Bhadarwa Road Taluka Savli Vadodara District 39178 India Shed No 18–22, GIDC Estate Kalol Gujarat 389330 India Page 2 of 4 P.T. Kalisabi No. 1, Kec. Langiewicza 50 95-050 Konstantynów Łódzki Poland Clariant Masterbatches (Saudi Arabia) Ltd 2nd Industrial City, Al-Kharj Road Riyadh Saudi Arabia Singapore Pte Ltd 1 International Business Park Singapore 609917 Singapore Pte Ltd 8 Third Chin Bee Road Singapore 618684 Avient South Africa (Pty) Ltd.

POLYETHER ETHERKETONE (PEEK) CCC7340-0401 CCV7340-0860 EEE7340-0600 CCC7330-0232 CCC7340-0699 EGF7340-2626 CCC7340-0500 CCC7340-0225 CCC7310-0900 EEE7310-0225 EGF7340-6661 EGF734R-5802 EEE7340-0008 EEE7340-0131 EEE7340-0819 BGF7346R-4778 EGG7340-2440 EEE7340-0451 VR-EGF7340-66-4 EGG7340-2263 POLYETHERIMIDE (PEI) ETT8710-0555 EEE8710-0474 EEE8710-0887 ETT8710-0320 ETT8710-0561 EEE8700-V001 EEE8700-0881 ETT8710-0241L EEE8710-0668b EEE8710-0302L ETT8710-0060 EEE8710-0300L EEE8710-0628 EEE8700R-0000 EEE8710-0400 POLYETHERSULFONE (PES) VR-ETT6220-06-1 ETT6220-0667 CTC6210-0402 VR-ETT6220-05-3 VR-BEE6226-09-3 CTC6210-0302 ETT6220-V001a VR-ETT6220-03-2 CTC6220-0296 EEE6220-0622 ETT6220-0240 ETT6220-0060 EEE6220-V500L EEE6220R-0726 POLYPHENYLSULFONE (PPSU) ETT6750-0658 VR-ETT6750-07-1 VR-EEE6750-04-5 VR-ETT6750-05-1 ETT6750-0763 VR-ETT6750-05-4 VR-ETT6750-06-4 VR-ETT6750-03-1 ETT6730-0830 EEE6750-0657 ETT6730-0303 VR-EEE6750-04-1 VR-ETT6750-02-2 VR-EEE6760R-03-2 VR-EEE6760-09-1 POLYSULFONE (PSU) ETT6511-0402 CCC6120-0760 EGF6511-4652a ETT6511-0601 CCC6120-0492 CCV6120-0845 ETT6511-0211 ETT6511-0245 CCC6511-0845 ETT6511-0560 ETT6511-0070 VR-CTC6511-08-5 ETT6120-0301a VR-ETT6511-06-6 VR-ETT6120-02-3 Copyright © 2020, Avient Corporation.

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View PDF The SQS herewith attests that the organisation named below has a management system that meets the requirements of the normative base mentioned. 70 01 _1 /A pr il 20 22 /V er si on 2 .0 Certificate Avient Colorants Germany GmbH Hohenrhein 1 56112 Lahnstein Germany Scope Production of Color Concentrates and Compounds Normative base ISO 50001:2018 Energy Management System Reg. no. 46089 Page 1 of 1 Validity 17. 12. 2023  – 16. 12. 2026 Issue 17. 12. 2023  A.Grisard, President SQS F.

Kalisabi No. 1, Kec. Cibodas 15138 Kecamatan Cibodas, Tangerang Indonesia Scope Category I Production of customer specific Masterbatches for Food packaging materials on the dedicated extrusion lines Normative base ISO 22000:2018 Food Safety Management Systems - Requirements for any organization in the food chain Reg. no. 46391 Page 1 of 1 Validity 25. 02. 2024  – 24. 02. 2027 Issue 25. 02. 2024  A.Grisard, President SQS F.