WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) Certificate Of Conformance has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 10 ABS Quality Evaluations Avient Corporation ISO 14001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Gebze, Kocaeli 41448 Turkey Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Facility: Avient Corporation - Guangzhou, China 2#, Nanyunsan Rd, Huangpu District, Science City Guangzhou Hi-Tech Industrial Development Zone Guangzhou, Guangdong Province 510663 People's Republic of China Facility: Avient Corporation - Guatemala City 27 Avenida 34-11, Zona 12 Complejo Parque Guatemala City 01012 Guatemala Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Binh Duong, Vietnam 03 Street 02, VSIP Thu n An, Binh Duong 820000 Vietnam Facility: Avient Corporation - Butterworth, Malaysia Lot 1232, MK. 15, Kawasan Industri Kecil & Sederhana Butterworth, Penang 14120 Malaysia Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Page 4 of 10 ABS Quality Evaluations Avient Corporation ISO 14001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. De Martorell, 124 Sant Andreu, Barcelona 8740 Spain Facility: Avient Corporation - Santa Clara, Mexico Plásticos 28 int B102 Santa Clara Coatitla, Ecatepec de Morelos, Estado de México 55540 México Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Shanghai (Xinzhuang), China No. 88, Lane 4377 Jindu Road Minhang District Shanghai 201108 People's Republic of China Facility: Avient Corporation - Shenzhen, China No. 1, Qihang Industry Park, Haoxiang Road Shajing Town, Baoan Shenzhen, Guangdong Province 518104 People's Republic of China Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Rania, India Survey No.344/1-2-3 Rania Works, Sakarda Bhadarwa Road Rania, Gujarat 391780 India Facility: Avient Corporation - Riyadh, Saudi Arabia 2nd Industrial City, Al-Kharj Road P.O.

WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) Certificate Of Conformance has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 10 ABS Quality Evaluations Avient Corporation RC14001®:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Gebze, Kocaeli 41448 Turkey Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Facility: Avient Corporation - Guangzhou, China 2#, Nanyunsan Rd, Huangpu District, Science City Guangzhou Hi-Tech Industrial Development Zone Guangzhou, Guangdong Province 510663 People's Republic of China Facility: Avient Corporation - Guatemala City 27 Avenida 34-11, Zona 12 Complejo Parque Guatemala City 01012 Guatemala Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Binh Duong, Vietnam 03 Street 02, VSIP Thu n An, Binh Duong 820000 Vietnam Facility: Avient Corporation - Butterworth, Malaysia Lot 1232, MK. 15, Kawasan Industri Kecil & Sederhana Butterworth, Penang 14120 Malaysia Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Page 4 of 10 ABS Quality Evaluations Avient Corporation RC14001®:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. De Martorell, 124 Sant Andreu, Barcelona 8740 Spain Facility: Avient Corporation - Santa Clara, Mexico Plásticos 28 int B102 Santa Clara Coatitla, Ecatepec de Morelos, Estado de México 55540 México Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Shanghai (Xinzhuang), China No. 88, Lane 4377 Jindu Road Minhang District Shanghai 201108 People's Republic of China Facility: Avient Corporation - Shenzhen, China No. 1, Qihang Industry Park, Haoxiang Road Shajing Town, Baoan Shenzhen, Guangdong Province 518104 People's Republic of China Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Rania, India Survey No.344/1-2-3 Rania Works, Sakarda Bhadarwa Road Rania, Gujarat 391780 India Facility: Avient Corporation - Riyadh, Saudi Arabia 2nd Industrial City, Al-Kharj Road P.O.

WITH ADDITIONAL FACILITIES LISTED ON ATTACHED ANNEX) Certificate Of Conformance has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: Page 2 of 10 ABS Quality Evaluations Avient Corporation ISO 14001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. Gebze, Kocaeli 41448 Turkey Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Facility: Avient Corporation - Guangzhou, China 2#, Nanyunsan Rd, Huangpu District, Science City Guangzhou Hi-Tech Industrial Development Zone Guangzhou, Guangdong Province 510663 People's Republic of China Facility: Avient Corporation - Guatemala City 27 Avenida 34-11, Zona 12 Complejo Parque Guatemala City 01012 Guatemala Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Binh Duong, Vietnam 03 Street 02, VSIP Thu n An, Binh Duong 820000 Vietnam Facility: Avient Corporation - Butterworth, Malaysia Lot 1232, MK. 15, Kawasan Industri Kecil & Sederhana Butterworth, Penang 14120 Malaysia Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Page 4 of 10 ABS Quality Evaluations Avient Corporation ISO 14001:2015 Certificate Of Conformance ANNEX At Below Facilities: Validity of this certificate may be confirmed at www.abs-qe.com/cert_validation. De Martorell, 124 Sant Andreu, Barcelona 8740 Spain Facility: Avient Corporation - Santa Clara, Mexico Plásticos 28 int B102 Santa Clara Coatitla, Ecatepec de Morelos, Estado de México 55540 México Activity: Design and Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Shanghai (Xinzhuang), China No. 88, Lane 4377 Jindu Road Minhang District Shanghai 201108 People's Republic of China Facility: Avient Corporation - Shenzhen, China No. 1, Qihang Industry Park, Haoxiang Road Shajing Town, Baoan Shenzhen, Guangdong Province 518104 People's Republic of China Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design and Manufacture of Colorants and Additives for Plastics Facility: Avient Corporation - Rania, India Survey No.344/1-2-3 Rania Works, Sakarda Bhadarwa Road Rania, Gujarat 391780 India Facility: Avient Corporation - Riyadh, Saudi Arabia 2nd Industrial City, Al-Kharj Road P.O.

OnFlex LO - HVAC Flap - Spanish PROVEEDOR TIER 2 R E J I L L A P A R A S I S T E M A S D E V E N T I L A C I Ó N Y C A L E F A C C I Ó N • Eliminar el post-calentamiento de las piezas a fin de lograr el nivel de olor necesario (≤3.0 VDA 270) • Tener la menor emisión de compuestos orgánicos volátiles (VOC/FOG) (VDA 278), con el mismo compresión set del material anterior • Menos pasos de procesamiento y menores costos de energía para el moldeador • Se lograron los niveles VOC/FOG requeridos y se cumplió el desempeño con el estándar de compresión set OnFlex™ LO REQUERIMIENTOS CLAVE ¿POR QUÉ AVIENT?

AVIENT BELGIUM 2, RUE MELVILLE WILSON 5330 ASSESSE- BELGIUM Bureau Veritas Certification France certify that the Management System of the above organization has been audited and found to be in accordance with the requirements of the management system standard detailed below: Standard ISO 14001 : 2015 Scope of certification DESIGN AND MANUFACTURE OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND SPECIALITY COMPOUNDS.

For and on behalf of BSI Theuns Kotze, Managing Director – IMETA Assurance Last Assessment Date: 2022/06/25 Latest issue Date: 2022/08/24 Expiry Date: 2023/08/17 BSI Group India Private Limited T: +91 11 2692 9000 (CIN U74899DL1999PTC101381 info.in@bsigroup.com The Mira Corporate Suites bsigroup.com/en-IN Plot 1&2, Ishwar Nagar, Mathura Road New Delhi-110065, India Good Manufacturing Practices mailto:info.in@bsigroup.com

Audit 2. ITEM 2. Audit 2.

Adjusted free cash flow for 2023 was $186 million, slightly ahead of expectations. 2 2024 Outlook “In the first quarter, we expect demand to continue to improve in our two largest end markets, packaging and consumer, as destocking comes to an end and our sustainable solutions portfolio expands. 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 7 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended December 31, Year Ended December 31, 2023 2022 2023 2022 Sales $ 719.0 $ 790.4 $ 3,142.8 $ 3,396.9 Cost of sales 510.1 618.4 2,250.3 2,514.2 Gross margin 208.9 172.0 892.5 882.7 Selling and administrative expense 165.8 171.6 695.7 639.4 Operating income 43.1 0.4 196.8 243.3 Interest expense, net (26.8) (49.4) (115.3) (119.8) Other income (expense), net 4.3 (28.4) 5.8 (59.7) Income (loss) from continuing operations before income taxes 20.6 (77.4) 87.3 63.8 Income tax benefit (expense) 7.0 60.8 (11.0) 19.3 Net income (loss) from continuing operations 27.6 (16.6) 76.3 83.1 Income (loss) from discontinued operations, net of income taxes 0.8 561.5 (0.1) 620.3 Net income 28.4 544.9 76.2 703.4 Net loss (income) attributable to noncontrolling interests 0.2 (0.4) (0.5) (0.3) Net income attributable to Avient common shareholders $ 28.6 $ 544.5 $ 75.7 $ 703.1 Earnings (loss) per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.30 $ (0.19) $ 0.83 $ 0.91 Discontinued operations 0.01 6.17 — 6.80 Total $ 0.31 $ 5.98 $ 0.83 $ 7.71 Earnings (loss) per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.30 $ (0.19) $ 0.83 $ 0.90 Discontinued operations 0.01 6.17 — 6.73 Total $ 0.31 $ 5.98 $ 0.83 $ 7.63 Cash dividends declared per share of common stock $ 0.2575 $ 0.2475 $ 1.0000 $ 0.9600 Weighted-average shares used to compute earnings per common share: Basic 91.2 91.0 91.1 91.2 Diluted 91.9 91.0 91.8 92.2 8 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended December 31, Year Ended December 31, 2023 2022 2023 2022 Cost of sales: Restructuring costs, including accelerated depreciation $ (2.0) $ (21.3) $ (11.9) $ (31.1) Environmental remediation costs (17.2) (0.4) (69.7) (24.2) Reimbursement of previously incurred environmental costs 1.6 — 1.6 8.3 Acquisition related costs — (23.8) — (34.1) Impact on cost of sales (17.6) (45.5) (80.0) (81.1) Selling and administrative expense: Restructuring and employee separation costs (1.1) (4.3) (14.9) (5.3) Legal and other (6.1) (4.0) (15.2) (3.0) Acquisition related costs (1.3) (6.1) (5.9) (19.3) Impact on selling and administrative expense (8.5) (14.4) (36.0) (27.6) Impact on operating income (26.1) (59.9) (116.0) (108.7) Interest expense, net - financing costs (0.1) (16.0) (2.3) (26.0) Mark-to-market on derivatives — — — (30.9) Pension and post retirement mark-to-market adjustment and other 3.8 (28.4) 3.7 (28.4) Impact on other income (expense), net 3.8 (28.4) 3.7 (59.3) Impact on income from continuing operations before income taxes (22.4) (104.3) (114.6) (194.0) Income tax benefit on above special items 4.5 26.8 27.7 49.4 Tax adjustments(2) 12.5 39.2 7.6 28.4 Impact of special items on net income from continuing operations $ (5.4) $ (38.3) $ (79.3) $ (116.2) Diluted earnings per common share impact $ (0.06) $ (0.42) $ (0.86) $ (1.26) Weighted average shares used to compute adjusted earnings per share: Diluted 91.9 91.7 91.8 92.2 (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 2) Tax adjustments include the net tax impact from non-recurring income tax items, adjustments to uncertain tax position reserves and the establishment, reversal or changes to valuation allowances. 9 Special items (1) Three Months Ended March 31, 2023 Cost of sales: Restructuring costs, including accelerated depreciation $ (6.6) Environmental remediation costs (1.4) Impact on cost of sales (8.0) Selling and administrative expense: Restructuring and employee separation costs (11.3) Legal and other (4.4) Acquisition related costs (3.4) Impact on selling and administrative expense (19.1) Impact on operating income (27.1) Other loss (0.2) Impact on income from continuing operations before income taxes (27.3) Income tax expense on above special items 6.9 Tax adjustments(2) (1.9) Impact of special items on net income from continuing operations $ (22.3) Diluted earnings per common share impact $ (0.24) Weighted average shares used to compute adjusted earnings per share: Diluted 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

Dirección para notificación judicial: Aut Medellin Km 2.5 Via Parcelas 1 Km Municipio: Cota (Cundinamarca) Correo electrónico de notificación: esperanza.laserna@avient.com Teléfono para notificación 1: 8773300 Teléfono para notificación 2: No reportó. La importación, producción, aplicación, distribución, comercialización, representación, exportación, y en general la intervención en cualquiera de las etapas del proceso económico de todo tipo de productos químicos; 2. Ejecutar las ordenes o disposiciones de la asamblea general de accionistas y de la junta directiva; 2.

Microsoft Word - Avient Announces First Quarter 2025 Results 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces First Quarter 2025 Results • First quarter sales of $827 million, reflects 2% organic growth over the prior year quarter, excluding the impact of foreign exchange • First quarter GAAP EPS of ($0.22) compared to $0.54 in the prior year quarter • First quarter adjusted EPS of $0.76, in-line with guidance; growth of 4% over the prior year quarter, excluding an unfavorable impact of $0.03 from foreign exchange • 2025 full year adjusted EPS guidance range of $2.70 to $2.94, unchanged from prior guidance CLEVELAND – May 6, 2025 – Avient Corporation (NYSE: AVNT), an innovator of materials solutions, today announced its first quarter results for 2025. Khandpur. 2 “From a regional perspective, Asia and Latin America delivered strong results, growing organic sales 9% and 17%, respectively,” Dr. EMEA delivered a fourth consecutive quarter of growth, increasing organic sales by 2%.