D is t. ) K W R R P M P P G A V Y F U L G C P F M C H X L IF F F O E H U N E C L K R A E M N A S H C E S C L G R A A L B Median: 5%Median: 3% Source: Peer data per Bloomberg market data as of March 12, 2021 Avient reflects 2021 estimated revenue of $4,100M and excludes one-time synergy capture CAPEX ($20M) Avient Specialty Formulators Other Chemical/Specialty Companies Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators. Free cash flow conversion calculated as (EBITDA – Capex) / EBITDA Median: 84% Median: 77% H I G H F R E E C A S H F L OW C O N V E R S I O N Avient reflects 2021 estimated EBITDA of $510M and excludes one-time synergy capture CAPEX ($20M) Source: Peer data per Bloomberg market data as of March 12, 2021 85 89 86 86 82 80 76 89 85 83 82 81 78 77 77 76 75 73 70 69 49 19 A vi e n t K W R P P G R P M A V Y F U L G C P F M C IF F H X L U N V R E C L A S H B N R F O E E M N C E G R A H U N K R A S C L A L B Source: Peer data per Bloomberg market data as of March 12, 2021 Total Enterprise Value / 2021E EBITDA Our current valuation implies an EBITDA multiple that is below specialty formulator peers and some of our more highly valued chemical peers. In 2021 we expect substantial earnings growth and strong cash flow generation as we emerge from the COVID-19 pandemic.

D is t. ) R P M P P G K W R F U L A V Y G C P IF F F M C H X L H U N E M N F O E E C L K R A S C L A S H C E G R A A L B Median: 5%Median: 3% Source: Peer data per Bloomberg market data as of February 5, 2021 Avient reflects 2021 estimated revenue of $4,100M and excludes one-time synergy capture CAPEX ($20M) Avient Specialty Formulators Other Chemical/Specialty Companies Free Cash Flow Conversion (1) 2021E (%) Being asset light helps us to generate strong free cash flow that is in line with specialty formulators. In 2021 we expect substantial earnings growth and strong cash flow generation as we emerge from the COVID-19 pandemic. Free Cash Flow Calculation Year Ended December 31, 2020 Cash provided (used) by operating activities $ 221.6 Capital expenditures (63.7) Free Cash Flow 157.9 Payment of post-acquisition date earnout liability 38.1 Taxes paid on gain on divestiture 142.0 Adjusted Free Cash Flow $ 338.0 Year Ended December 31, 2019 Free Cash Flow Calculation Total Discontinued Operations Continuing Operations Cash provided by operating activities $ 300.8 $ 74.4 $ 226.4 Capital expenditures 81.7 14.1 67.6 Free Cash Flow $ 219.1 $ 60.3 $ 158.8 6 Avient IR Presentation - Goldman Sachs and Morgan Stanley.pdf Avient IR Presentation - Goldman Sachs and Morgan Stanley - Website.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf Avient Q4 Earnings and 2021 Outlook.pdf 2.5.21 IR Deck Attachments clean

Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com http://www.avient.com/news 7 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2022 2021 2022 2021 Sales $ 823.3 $ 818.0 $ 2,606.5 $ 2,508.5 Operating Income 40.6 52.8 242.9 229.6 Net (loss) income from continuing operations attributable to Avient shareholders (27.4) 33.7 99.8 143.3 Basic (loss) earnings per share from continuing operations attributable to Avient shareholders $ (0.30) $ 0.37 $ 1.09 $ 1.57 Diluted (loss) earnings per share from continuing operations attributable to Avient shareholders $ (0.30) $ 0.37 $ 1.08 $ 1.56 Senior management uses comparisons of adjusted net income attributable to Avient shareholders and diluted adjusted earnings per share (EPS) attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to Consolidated Statements of Income 2022 2021 2022 2021 Sales $ 823.3 $ 818.0 $ 2,606.5 $ 2,508.5 Gross margin - GAAP 195.4 215.6 710.7 727.3 Special items in gross margin (Attachment 3) 31.8 17.3 35.6 27.7 Adjusted gross margin $ 227.2 $ 232.9 $ 746.3 $ 755.0 Adjusted gross margin as a percent of sales 27.7 % 28.5 % 28.6 % 30.1 % Operating income - GAAP 40.6 52.8 242.9 229.6 Special items in operating income (Attachment 3) 40.2 20.0 48.8 36.6 Adjusted operating income $ 80.8 $ 72.8 $ 291.7 $ 266.2 Adjusted operating income as a percent of sales 9.8 % 8.9 % 11.2 % 10.6 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures. Three Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results (Loss) income from continuing operations before income taxes $ (29.0) $ 82.0 $ 53.0 $ 35.4 $ 19.9 $ 55.3 Income tax expense - GAAP 1.2 — 1.2 (2.0) — (2.0) Income tax impact of special items (Attachment 3) — (20.5) (20.5) — (4.6) (4.6) Tax adjustments (Attachment 3) — 6.8 6.8 — (3.6) (3.6) Income tax (expense) benefit $ 1.2 $ (13.7) $ (12.5) $ (2.0) $ (8.2) $ (10.2) Effective Tax Rate(1) 4.1 % 23.7 % 5.7 % 18.4 % (1) Rates may not recalculate from figures presented herein due to rounding 14 Nine Months Ended September 30, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $141.2 $ 89.6 $ 230.8 $176.1 $ 36.5 $ 212.6 Income tax expense - GAAP (41.5) — (41.5) (32.1) — (32.1) Income tax impact of special items (Attachment 3) — (22.5) (22.5) — (8.9) (8.9) Tax adjustments (Attachment 3) — 10.8 10.8 — (1.6) (1.6) Income tax (expense) benefit $ (41.5) $ (11.7) $ (53.2) $ (32.1) $ (10.5) $ (42.6) Effective Tax Rate(1) 29.4 % 23.1 % 18.2 % 20.0 % (1) Rates may not recalculate from figures presented herein due to rounding Three Months Ended September 30, Nine Months Ended September 30, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 2022 2021 Net (loss) income from continuing operations – GAAP $ (27.8) $ 33.4 $ 99.7 $ 144.0 Income tax (benefit) expense (1.2) 2.0 41.5 32.1 Interest expense 37.3 19.0 70.4 57.8 Depreciation and amortization from continuing operations 39.8 36.6 113.7 107.1 EBITDA $ 48.1 $ 91.0 $ 325.3 $ 341.0 Special items, before tax 82.0 19.9 89.6 36.5 Interest expense included in special items (10.0) — (10.0) — Depreciation and amortization included in special items (0.8) (0.9) (4.0) (0.1) Adjusted EBITDA $ 119.3 $ 110.0 $ 400.9 $ 377.4 NEWS RELEASE Attachment 1

About Avient Avient Corporation (NYSE: AVNT), with 2021 revenues of $4.8 billion, provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world. Three Months Ended March 31, Reconciliation to Consolidated Statements of Income 2022 2021 Sales $ 1,293.8 $ 1,162.3 Gross margin - GAAP 293.7 302.4 Special items in gross margin (Attachment 3) 5.8 (2.2) Adjusted gross margin $ 299.5 $ 300.2 Adjusted gross margin as a percent of sales 23.2 % 25.8 % Operating income - GAAP 128.6 120.4 Special items in operating income (Attachment 3) 7.8 2.4 Adjusted operating income $ 136.4 $ 122.8 Adjusted operating income as a percent of sales 10.5 % 10.6 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures. Three Months Ended March 31, 2022 2021 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results $111.1 $ 7.7 $ 118.8 $102.6 $ 2.4 $ 105.0 Income tax expense - GAAP (26.6) — (26.6) (22.9) — (22.9) Income tax impact of special items (Attachment 3) — (2.0) (2.0) — (0.9) (0.9) Tax adjustments (Attachment 3) — 1.5 1.5 — 1.1 1.1 Income tax (expense) benefit $ (26.6) $ (0.5) $ (27.1) $ (22.9) $ 0.2 $ (22.7) Effective Tax Rate(1) 23.9 % 22.8 % 22.3 % 21.6 % (1) Rates may not recalculate from figures presented herein due to rounding 12 Reconciliation of EBITDA by Segment Three Months Ended March 31, 2022 2021 Operating income: Color, Additives and Inks $ 94.5 $ 88.8 Specialty Engineered Materials 39.7 34.2 Distribution 24.2 24.0 Corporate and eliminations (29.8) (26.6) Operating income $ 128.6 $ 120.4 Items below OI in Corporate: Other income, net $ (0.6) $ 1.5 Depreciation & amortization: Color, Additives and Inks $ 26.0 $ 27.4 Specialty Engineered Materials 7.8 7.8 Distribution 0.2 0.2 Corporate and eliminations 3.8 1.7 Depreciation & Amortization $ 37.8 $ 37.1 EBITDA: Color, Additives and Inks $ 120.5 $ 116.2 Specialty Engineered Materials 47.5 42.0 Distribution 24.4 24.2 Corporate and eliminations (26.0) (24.9) Other income, net (0.6) 1.5 EBITDA $ 165.8 $ 159.0 EBITDA as a % of Sales: Color, Additives and Inks 18.6 % 19.1 % Specialty Engineered Materials 19.4 % 19.4 % Distribution 5.6 % 6.7 % Three Months Ended March 31, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 Net income from continuing operations – GAAP $ 84.5 $ 79.7 Income tax expense 26.6 22.9 Interest expense 16.9 19.3 Depreciation and amortization 37.8 37.1 EBITDA $ 165.8 $ 159.0 Special items, before tax 7.7 2.4 Depreciation and amortization included in special items (2.1) (0.5) Adjusted EBITDA $ 171.4 $ 160.9 NEWS RELEASE Attachment 1

Cámara de Comercio de Bogotá Sede Virtual CERTIFICADO DE EXISTENCIA Y REPRESENTACIÓN LEGAL Fecha Expedición: 12 de abril de 2021 Hora: 13:04:47 Recibo No. REFORMAS ESPECIALES Por Acta No. 17 del 9 de abril de 2021 de Accionista Único, inscrito en esta Cámara de Comercio el 12 de abril de 2021, con el No. 02683838 del Libro IX, la sociedad cambió su denominación o razón social de CLARIANT PLASTICS & COATINGS (COLOMBIA) SAS a AVIENT COLOMBIA S.A.S. Página 4 de 11 Cámara de Comercio de Bogotá Sede Virtual CERTIFICADO DE EXISTENCIA Y REPRESENTACIÓN LEGAL Fecha Expedición: 12 de abril de 2021 Hora: 13:04:47 Recibo No.

RTF Template Place and date: For the issuing office: Shanghai, 19 March, 2021 DNV GL - Business Assurance Suite A, Building 9, No.1591 Hongqiao Road, Changning District, Shanghai 200336, P.R. TEL:+31(0)102922689. www.dnvgl.com/assurance Certificate No: 7071-1998-AQ-RGC-RvA Initial certification date: 28 April, 1998 Valid: 29 March, 2021 – 29 March, 2024 This is to certify that the management system of PolyOne-Shanghai, China No. 88, Guo Shou Jing Road, Z. Park, Pudong, Shanghai China, 201203 and the sites as mentioned in the appendix accompanying this certificate has been found to conform to the Quality Management System standard: GB/T 19001-2016/ISO 9001:2015 This certificate is valid for the following scope: Design and Manufacture of Masterbatch Certificate No: 7071-1998-AQ-RGC-RvA Place and date: Shanghai, 19 March, 2021 Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid.

Registration number 1019288451 TQ 0004 Status Valid Effective date of status 2017-08-01 Date viewed 2021-02-04 Business's name AVIENT CANADA ULC Business name SPARTECH PLASTIQUES Registration number to validate 1019288451TQ0004 Page 1 of 1Validate a QST Registration Number - Revenu Québec 2/4/2021https://entreprises.revenuquebec.ca/EntNa/SX/SX00/SX00.SXCLT20A.ValiderInscription/...

Despite these challenges, Avient’s pro forma adjusted EPS increased 1% compared to 2021. a semiconductor company based in California) from April 2019 to June 2021. No such impairments were recognized during 2022, 2021 or 2020.

Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com 8 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended December 31, Year Ended December 31, 2022 2021 2022 2021 Sales $ 790.4 $ 807.1 $ 3,396.9 $ 3,315.5 Operating Income 0.4 50.2 243.3 279.7 Net (loss) income from continuing operations attributable to Avient shareholders (17.0) 11.2 82.8 151.8 Diluted (loss) earnings per share from continuing operations attributable to Avient shareholders $ (0.19) $ 0.12 $ 0.90 $ 1.65 Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results. Three Months Ended December 31, Year Ended December 31, 2022 2021 2022 2021 Sales: Color, Additives and Inks $ 490.8 $ 581.3 $ 2,355.0 $ 2,401.6 Specialty Engineered Materials 300.8 226.3 1,044.4 911.6 Corporate (1.2) (0.5) (2.5) 2.3 Sales $ 790.4 $ 807.1 $ 3,396.9 $ 3,315.5 Gross margin: Color, Additives and Inks $ 134.5 $ 164.5 $ 681.3 $ 727.5 Specialty Engineered Materials 82.4 58.3 283.7 250.9 Corporate (44.9) (6.2) (82.3) (34.6) Gross margin $ 172.0 $ 216.6 $ 882.7 $ 943.8 Selling and administrative expense: Color, Additives and Inks $ 90.2 $ 103.3 $ 380.3 $ 424.4 Specialty Engineered Materials 47.2 31.2 143.6 125.4 Corporate 34.2 31.9 115.5 114.3 Selling and administrative expense $ 171.6 $ 166.4 $ 639.4 $ 664.1 Operating income: Color, Additives and Inks $ 44.3 $ 61.2 $ 301.0 $ 303.1 Specialty Engineered Materials 35.2 27.1 140.1 125.5 Corporate (79.1) (38.1) (197.8) (148.9) Operating income $ 0.4 $ 50.2 $ 243.3 $ 279.7 14 Attachment 7 Avient Corporation Reconciliation of Non-GAAP Financial Measures (Unaudited) (In millions, except per share data) Senior management uses gross margin before special items and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and how it may serve as a basis for future performance. Three Months Ended December 31, Year Ended December 31, Reconciliation to Consolidated Statements of Income 2022 2021 2022 2021 Sales $ 790.4 $ 807.1 $ 3,396.9 $ 3,315.5 Gross margin - GAAP 172.0 216.6 882.7 943.8 Special items in gross margin (Attachment 3) 45.5 5.9 81.1 33.6 Adjusted Gross margin $ 217.5 $ 222.5 $ 963.8 $ 977.4 Adjusted Gross margin as a percent of sales 27.5 % 27.6 % 28.4 % 29.5 % Operating income - GAAP 0.4 50.2 243.3 279.7 Special items in operating income (Attachment 3) 59.9 11.2 108.7 47.8 Adjusted Operating income $ 60.3 $ 61.4 $ 352.0 $ 327.5 Adjusted Operating income as a percent of sales 7.6 % 7.6 % 10.4 % 9.9 % The table below reconciles pre-special income tax expense and the pre-special effective tax rate to their most comparable US GAAP figures.

CERTIFICATE OF INCORPORATION ON CHANGE OF NAME Company Number 3141094 The Registrar of Companies for England and Wales hereby certifies that under the Companies Act 2006: POLYONE CORPORATION UK LIMITED a company incorporated as private limited by shares, havingits registered office situated in England and Wales, has changed its name to: AVIENT MATERIAL SOLUTIONS UK LIMITED Given at Companies House on9th November 2021.