Een onafhankelijk bedrijf ontvangt alle website- en telefoonmeldingen die de ethische hotline krijgt en meldt de informatie aan de bedrijfsfunctionaris voor ethiek. De website van de ethische hotline is te vinden op avient.ethicspoint.com. Geef bij het melden van een probleem met betrekking tot een betaling de volgende informatie door (voor zover u op de hoogte bent van deze gegevens): • het bedrag en het doel van de betaling; • de identificatiegegevens en de branche van de persoon die de betaling uitvoert; • de omstandigheden waaronder de betaling is uitgevoerd; • de identiteit van alle personen die op de hoogte zijn van de betaling; Bescherming tegen vergelding Vergelding tegen een werknemer die te goeder trouw een schending of een mogelijke schending van dit beleid heeft gemeld, is in welke vorm dan ook verboden.

Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 7 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, 2021 2020 2021 2020 Sales $ 1,201.5 $ 997.0 $ 4,818.8 $ 3,242.1 Operating Income 74.0 65.0 381.2 189.3 Net income from continuing operations attributable to Avient shareholders 29.8 74.2 230.8 132.0 Basic earnings per share from continuing operations attributable to Avient shareholders $ 0.33 $ 0.81 $ 2.53 $ 1.47 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.32 $ 0.81 $ 2.51 $ 1.46 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, Reconciliation to Consolidated Statements of Income 2021 2020 2021 2020 Sales $ 1,201.5 $ 997.0 $ 4,818.8 $ 3,242.1 Gross margin - GAAP 253.1 252.9 1,099.6 784.3 Special items in gross margin (Attachment 3) 5.9 1.7 33.6 25.3 Adjusted Gross margin $ 259.0 $ 254.6 $ 1,133.2 $ 809.6 Adjusted Gross margin as a percent of sales 21.6 % 25.5 % 23.5 % 25.0 % Operating income - GAAP 74.0 65.0 381.2 189.3 Special items in operating income (Attachment 3) 11.2 14.6 47.8 73.7 Adjusted Operating income $ 85.2 $ 79.6 $ 429.0 $ 263.0 Adjusted Operating income as a percent of sales 7.1 % 8.0 % 8.9 % 8.1 % 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 December 31, 2021 2020 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $ 51.1 $ 20.6 $ 71.7 $ 57.4 $ 4.2 $ 61.6 Income tax (expense) benefit - GAAP (22.2) — (22.2) 17.3 — 17.3 Income tax impact of special items (Attachment 3) — (4.1) (4.1) — 1.3 1.3 Tax adjustments (Attachment 3) — 7.5 7.5 — (32.2) (32.2) Income tax (expense) benefit $ (22.2) $ 3.4 $ (18.8) $ 17.3 $ (30.9) $ (13.6) Effective Tax Rate(1) 43.4 % 26.0 % (30.1) % 22.1 % (1) Rates may not recalculate from figures presented herein due to rounding 14 Year Ended December 31, 2021 2020 GAAP Results Special Items Adjusted Results GAAP Results Special Items Adjusted Results Income from continuing operations before income taxes $304.6 $ 57.1 $ 361.7 $ 139.0 $ 66.2 $ 205.2 Income tax expense - GAAP (74.0) — (74.0) (5.2) — (5.2) Income tax impact of special items (Attachment 3) — (13.0) (13.0) — (14.1) (14.1) Tax adjustments (Attachment 3) — 5.9 5.9 — (27.3) (27.3) Income tax expense $ (74.0) $ (7.1) $ (81.1) $ (5.2) $ (41.4) $ (46.6) Effective Tax Rate(1) 24.3 % 22.4 % 3.7 % 22.7 % (1) Rates may not recalculate from figures presented herein due to rounding The following pro forma adjustments are referenced by management to provide comparable business performance by incorporating the Clariant Color business in periods prior to the acquisition date (July 1, 2020).

Rose Vice President, Marketing and Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com 6 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2024 2023 Sales $ 829.0 $ 845.7 Operating income 94.0 57.1 Net income from continuing operations attributable to Avient shareholders 49.4 20.8 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.54 $ 0.23 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 March 31, 2024 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 49.4 $ 0.54 $ 20.8 $ 0.23 Special items, after-tax (Attachment 3) 5.5 0.06 22.3 0.24 Amortization expense, after-tax 14.9 0.16 15.1 0.16 Adjusted net income / EPS $ 69.8 $ 0.76 $ 58.2 $ 0.63 7 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended March 31, 2024 2023 Sales $ 829.0 $ 845.7 Cost of sales 550.8 598.1 Gross margin 278.2 247.6 Selling and administrative expense 184.2 190.5 Operating income 94.0 57.1 Interest expense, net (26.6) (28.8) Other (expense) income, net (0.9) 0.7 Income from continuing operations before income taxes 66.5 29.0 Income tax expense (16.8) (7.7) Net income from continuing operations 49.7 21.3 Loss from discontinued operations, net of income taxes — (0.9) Net income 49.7 20.4 Net income attributable to noncontrolling interests (0.3) (0.5) Net income attributable to Avient common shareholders $ 49.4 $ 19.9 Earnings (loss) per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.54 $ 0.23 Discontinued operations — (0.01) Total $ 0.54 $ 0.22 Earnings (loss) per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.54 $ 0.23 Discontinued operations — (0.01) Total $ 0.54 $ 0.22 Cash dividends declared per share of common stock $ 0.2575 $ 0.2475 Weighted-average shares used to compute earnings per common share: Basic 91.2 91.0 Diluted 92.0 91.8 8 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended March 31, 2024 2023 Cost of sales: Restructuring costs, including accelerated depreciation $ 3.6 $ (6.6) Environmental remediation costs (4.0) (1.4) Impact on cost of sales (0.4) (8.0) Selling and administrative expense: Restructuring and employee separation costs (0.7) (11.3) Legal and other (3.5) (4.4) Acquisition related costs (1.6) (3.4) Impact on selling and administrative expense (5.8) (19.1) Impact on operating income (6.2) (27.1) Other income (loss), net — (0.2) Impact on income from continuing operations before income taxes (6.2) (27.3) Income tax benefit on above special items 1.4 6.9 Tax adjustments(2) (0.7) (1.9) Impact of special items on net income from continuing operations $ (5.5) $ (22.3) Diluted earnings per common share impact $ (0.06) $ (0.24) Weighted average shares used to compute adjusted earnings per share: Diluted 92.0 91.8 (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to- market adjustments associated with gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non- recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results Three Months Ended March 31, Reconciliation to Consolidated Statements of Income 2024 2023 Sales $ 829.0 $ 845.7 Gross margin - GAAP 278.2 247.6 Special items in gross margin (Attachment 3) 0.4 8.0 Adjusted gross margin $ 278.6 $ 255.6 Adjusted gross margin as a percent of sales 33.6 % 30.2 % Operating income - GAAP 94.0 57.1 Special items in operating income (Attachment 3) 6.2 27.1 Adjusted operating income $ 100.2 $ 84.2 Adjusted operating income as a percent of sales 12.1 % 10.0 % Three Months Ended March 31, Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations - GAAP $ 49.7 $ 21.3 Income tax expense 16.8 7.7 Interest expense, net 26.6 28.8 Depreciation and amortization 44.3 50.5 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales 17.3 % 15.8 % Year Ended December 31, 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS Net income from continuing operations attributable to Avient shareholders $ 75.8 $ 0.83 Special items, after-tax 79.3 0.86 Amortization expense, after-tax 61.5 0.67 Adjusted net income / EPS $ 216.6 $ 2.36 13 Three Months Ended June 30, 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 Special items, after-tax 19.6 0.21 Amortization expense, after-tax 16.2 0.18 Adjusted net income / EPS $ 57.9 $ 0.63 NEWS RELEASE Attachment 1

ECCOH™ LSFOH BAJA EMISIÓN DE HUMOS CERO HALÓGENOS RECOMENDACIONES DE PROCESO Directrices Generales Para La Extrusión ECCOH™ son compuestos termoplásticos de poliolefinas sin halogenos y con baja emisión de humos. Solo para productos reticulados: El silano seco no se debe secar; tiene una vida útil de 6 meses si se almacena cerrado en un lugar fresco y seco, y debe utilizarse dentro de un período de pocos días después de su apertura del empaque. Purgar constantemente en la manera de lo posible.

Syncure™ XLPE Formulaciones Para Polietileno Reticulable PARA CABLES DE BAJA TENSIÓN GUÍA DE SELECCIÓN DE PRODUCTO Syncure™ XLPE POLIETILENO RETICULABLE POR HUMEDAD PARA AISLAMIENTO PARA CABLES DE BAJA TENSIÓN SISTEMA S100FH S100FH-XUV S100FH-UV S100FV S100FV-UV S112NA S120NA S200FH S200FV Aplicaciones Cable para construcción, bandeja de cables Cable para construcción, bandeja de cables Cable fotovoltaico (PV) Cable para construcción, bandeja de cables Cable para construcción, bandeja de cables Cable para construcción, Teck-90 Tuberia Cable para edificaciones, tray cables, cables de servicio Cable para edificaciones, tray cables, cables de servicio Especificaciones UL 44 UL 44 UL 44, UL 4703 UL 44 UL 44 CSA 22.2 Usable para NSF 61 UL 44 UL 44 Tipo de alambre XHHW-2, RHW-2, USE-2, SIS XHHW-2, RHW-2, USE-2, SIS XHHW-2, RHW-2, USE-2, SIS, PV XHHW-2, RHW-2, SIS XHHW-2, RHW-2, USE-2, SIS, PV RW-90, Teck-90 – RHW-2, RHW, RHH, XHHW-2, XHH, XHHW, SIS RHW, RHH, RHW-2 % de componentes 83% S1054A 17% V0022G RoHS 83% S1054A 17% V0022G-UV RoHS 70% S1054A 30% V0022G-UV RoHS 50% S1054A 50% V0044G RoHS 50% S1054A 50% V0044G-UV RoHS 95% S1054A 5% S1000B 95% S1016A 5% S1037B 78% S1054A 22% SC5400-0002 RoHS MB ALT FR 50% S1054A 50% SC5400-0003 RoHS MB ALT FR Caracteristicas Flama horizontal Flama horizontal, resistencia UV, posibilidad de colorear Flama horizontal, flama FV-1, resistencia UV, posibilidad de colorear VW-1 VW-1, resistencia UV, posibilidad de colorear Sin retardante a la flama Para aplicaciones de tuberia Flama horizontal, libre de DBDPE VW-1, libre de DBDPE PROPIEDADES GENERALES Gravedad Específica 1.01 1.02 1.10 1.31 1.31 0.92 0.95 1.01 1.31 Rigidez Shore D, 10 Segundos 47 47 47 48 48 47 59 47 48 % de Contenido de Gel 68 68 70 70 70 72 72 68 70 PROPIEDADES DE RESISTENCIA A LA TRACCIÓN Resistencia a la Tracción (psi) 2800 2500 2500 3200 2650 2800 4500 2800 3200 % de Elongación 400 400 400 470 540 400 80 400 470 % de Retención de Tracción 100 100 97 110 110 95 75 95 100 % de Retención de Elongación 90 90 94 100 100 90 75 90 93 PROPIEDADES ELÉCTRICAS Resistencia Dieléctrica (V/mil) 1000 1400 1400 1200 1200 1000 –– 1000 1200 Constante Dieléctrica 2.31 2.45 2.61 2.61 2.61 2.24 2.1 2.31 2.61 % de Factor de Disipación 0.0012 0.0080 0.008 0.0043 0.0043 0.0008 0.002 0.0012 0.0043 PROPIEDADES TÉRMICAS Condiciones Nominales de Temperatura en °C 90 90 90 90 90 90 125 90 90 % de Deformación Térmica 10 10 5 5 5 10 10 10 5 La cartera Syncure XLPE es un sistema de dos pasos de Polietileno reticulable por humedad, injertado con Silano. Producidos con tecnología Sioplas, Syncure XLPE ofrece al fabricante importantes ventajas y económicas comparado con los procesos como el de peróxido orgánico, radiación y reticulación de copolimeros por reactor. CARACTERÍSTICAS • Curación a temperatura ambiente • Pirorresistencia • Resistente al calor, el aceite, la fluencia lenta y la abrasión • Propiedades de baja temperatura • Temperature rating por arriba de 125°C • Baja inversión de capital • Alta velocidad de extrusión • Incluidos en boletines de UL/CSA www.avient.com Copyright © 2023, Avient Corporation.

4/16/2021 Comprovante de Inscrição e de Situação Cadastral https://servicos.receita.fazenda.gov.br/servicos/cnpjreva/Cnpjreva_Comprovante.asp 1/2 Comprovante de Inscrição e de Situação Cadastral Cidadão, Con�ra os dados de Identi�cação da Pessoa Jurídica e, se houver qualquer divergência, providencie junto à RFB a sua atualização cadastral. REPÚBLICA FEDERATIVA DO BRASIL       CADASTRO NACIONAL DA PESSOA JURÍDICA     NÚMERO DE INSCRIÇÃO 23.318.607/0001-10 MATRIZ COMPROVANTE DE INSCRIÇÃO E DE SITUAÇÃO CADASTRAL DATA DE ABERTURA 22/09/2015   NOME EMPRESARIAL AVIENT COLORANTS BRASIL LTDA.   Emitido no dia 16/04/2021 às 12:38:32 (data e hora de Brasília).

REPÚBLICA FEDERATIVA DO BRASIL CADASTRO NACIONAL DA PESSOA JURÍDICA NÚMERO DE INSCRIÇÃO 02.166.983/0001-66 MATRIZ COMPROVANTE DE INSCRIÇÃO E DE SITUAÇÃO CADASTRAL DATA DE ABERTURA 03/10/1997 NOME EMPRESARIAL AVIENT BRASIL LTDA. 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. Emitido no dia 02/06/2021 às 11:50:19 (data e hora de Brasília).

Purgar constantemente en la medida de lo posible. Los sistemas Syncure™ son sistemas de compuestos reticulables curadas por exposición a la humedad de dos componentes base polietileno para aislamiento de alambres y cables. EXTRUSOR Tornillo 1½" to 6" para polietileno—Maddock; relación de compresión 3:1 Cabezal De presión Dado Del tamaño adecuado para una hilera de 1/8" o menos L/D 24:1 o superior Paquete de mallas Malla de 20/60/60/20 Canal de enfriamiento 50–65°C Alimentador Gravimétrico—3 compartimentos (para el color) Condiciones de secado, solo para catalizador Desecante, 4 horas a 60°C PROCESAMIENTO Temperatura Precalentamiento del alambre 110–120°C Zonas de alimentación 165°C Transición 170°C Dosificación 177°C Cabezal/dado 182°C Material fundido 177–190°C Llama a la punta del salida del dado Sí Velocidad de la línea La velocidad superior de la línea mejora mezclado de los dos compuestos y apariencia superficial del dislamiento de la superficie Compuesto de purga HDPE www.avient.com Copyright © 2020, Avient Corporation.

Three Months Ended December 31, 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 Year Ended December 31, 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 Three Months Ended December 31, Year Ended December 31, 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). Three Months Ended Year Ended Reconciliation of Pro Forma Adjusted Earnings per Share December 31, 2022 Net (loss) income from continuing operations attributable to Avient shareholders $ (17.0) $ 82.8 Special items, after tax 38.3 116.2 Amortization expense, after-tax 14.6 49.0 Adjusted net income from continuing operations excluding special items 35.9 248.0 Pro forma adjustments* 2.5 13.6 APM pro forma amortization expense, after-tax* — 19.1 Pro forma adjusted net income from continuing operations attributable to Avient shareholders $ 38.4 $ 280.7 Weighted average diluted shares 91.7 92.2 Pro forma adjusted EPS - excluding special items pro forma for APM acquisition $ 0.42 $ 3.04 * Pro forma adjustment to reflect APM results for the period before Avient ownership including the impacts of debt financing and paydown of debt with net proceeds from the Distribution sale. 2 Three Months Ended December 31, Year Ended December 31, 2023 2022 2023 2022 Sales: Color, Additives and Inks $ 459.4 $ 490.8 $ 2,007.4 $ 2,355.0 Specialty Engineered Materials 259.8 300.8 1,138.2 1,044.4 Corporate (0.2) (1.2) (2.8) (2.5) Sales $ 719.0 $ 790.4 $ 3,142.8 $ 3,396.9 Operating income: Color, Additives and Inks $ 61.8 $ 44.3 $ 259.9 $ 301.0 Specialty Engineered Materials 29.4 35.2 142.5 140.1 Corporate (48.1) (79.1) (205.6) (197.8) Operating income $ 43.1 $ 0.4 $ 196.8 $ 243.3 Other expense, net: $ 4.3 $ (28.4) $ 5.8 $ (59.7) Depreciation & amortization: Color, Additives and Inks $ 22.2 $ 25.2 $ 98.3 $ 101.3 Specialty Engineered Materials 19.8 20.3 81.5 48.7 Corporate 2.2 3.1 9.0 12.5 Depreciation & amortization $ 44.2 $ 48.6 $ 188.8 $ 162.5 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 84.0 $ 69.5 $ 358.2 $ 402.3 Specialty Engineered Materials 49.2 55.5 224.0 188.8 Corporate (45.9) (76.0) (196.6) (185.3) Other expense, net $ 4.3 $ (28.4) $ 5.8 $ (59.7) EBITDA $ 91.6 $ 20.6 $ 391.4 $ 346.1 Special items in EBITDA 22.3 86.8 110.4 162.5 EBITDA - excluding special items $ 113.9 $ 107.4 $ 501.8 $ 508.6 APM pro forma adjustments - 8 months 2022* — — — 83.1 Pro forma EBITDA $ 113.9 $ 107.4 $ 501.8 $ 591.7 * Pro forma adjustment for January - August 2022 APM results (period before Avient ownership). 3 AVNT Q4 2023 Earnings Presentation_For Website_with Non-GAAP.pdf AVNT Q4 2023 Earnings Presentation_For Website.pdf IR Deck - AVNT-2023.12.31 (2.12.24 9PM Milestone February 12 0905 pm).pdf Attachment Non-GAAP Update.pdf

A validade deste certificado é baseada em auditorias periódicas do sistema de gestão definido pelo escopo acima e está condicionada à notificação por escrito ao ABS Quality Evaluations, Inc. de mudanças significativas no sistema de gestão ou seus componentes. Francisco Nakasato, 1700 Bairro São Roque das Chaves Itupeva, SP 13295-000 Brasil ISO 9001:2015 O Sistema de Gestão da Qualidade é aplicável a: Certificado No: 49862 Data de Expiração Anterior: 09 Abril 2020 Data de Aprovação Original: 16 Abril 2014 Data de Certificação: 13 Abril 2020 Data Efetiva: 06 Abril 2023 Data de Expiração: 09 Abril 2026 Data de Emissão: 06 Abril 2023 Dominic Townsend, Presidente DEVELOPMENT, PRODUCTION, SALES AND TECHNICAL ASSISTANCE OF LIQUID COLORANTS, COLORS CONCENTRATES AND ADDITIVES FOR THE PLASTICS, FIBERS AND RUBBER MARKET IN GENERAL DESENVOLVIMENTO, PRODUÇÃO, VENDAS E ASSISTÊNCIA TÉCNICA DE COLORANTES LÍQUIDOS, CONCENTRADOS DE CORES E ADITIVOS PARA O MERCADO DE PLÁSTICOS, FIBRAS E BORRACHAS EM GERAL. Certificado de Conformidade