Senior management has referenced adjusted EPS excluding the impact of additional shares issued in February 2020. On January 28, 2020, prior to the issuance of the additional shares, the Company provided guidance for adjusted EPS for the first quarter of 2020. This guidance excluded the impact of the additional shares subsequently issued in February.

This is to confirm that the Environmental, Health, Safety and Security Management System of: Avient Corporation HQ 33587 Walker Road The Environmental, Health, Safety and Security Management System is applicable to: Certificate No: 65536 Effective Date: 29 September 2023 Expiration Date: 28 September 2026 Revision Date: 22 November 2023 Dominic Townsend, President CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Garibaldi 2405 Lomas de Zamora, Buenos Aires 1832 Argentina Activity: Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Colorants SA Parc Scientifique Fleming, Fond Jean Pâques 1 Louvain-La-Nueve, Walloon Brabant 1348 Belgium Facility: Avient Corporation - Maipu, Chile Camino a Melipilla 15.170 Maipu, Región Metropolitana de Santiago 9250000 Chile Activity: Design and Manufacture of Colour and Additive Concentrates, Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Corporation - Lahore, Pakistan Plot no. 135, Kitaar, Bund Road Off Multan Road, Thokar Niaz Baig. WA-06, Kalyan-Padgha Road Vashere, Maharashtra 421302 Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design & Manufacture of Color, Additive Concentrate & Specialty Facility: Avient Corporation - Suzano, Brasil Av.

This is to certify that the Environmental Management System of: Avient Corporation HQ 33587 Walker Road The Environmental Management System is applicable to: Certificate No: 65537 Effective Date: 29 September 2023 Expiration Date: 27 September 2026 Revision Date: 22 November 2023 Dominic Townsend, President CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Garibaldi 2405 Lomas de Zamora, Buenos Aires 1832 Argentina Activity: Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Colorants SA Parc Scientifique Fleming, Fond Jean Pâques 1 Louvain-La-Nueve, Walloon Brabant 1348 Belgium Facility: Avient Corporation - Maipu, Chile Camino a Melipilla 15.170 Maipu, Región Metropolitana de Santiago 9250000 Chile Activity: Design and Manufacture of Colour and Additive Concentrates, Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Corporation - Lahore, Pakistan Plot no. 135, Kitaar, Bund Road Off Multan Road, Thokar Niaz Baig. WA-06, Kalyan-Padgha Road Vashere, Maharashtra 421302 Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design & Manufacture of Color, Additive Concentrate & Specialty Facility: Avient Corporation - Suzano, Brasil Av.

This is to certify that the Environmental Management System of: Avient Corporation HQ 33587 Walker Road The Environmental Management System is applicable to: Certificate No: 65537 Certification Date: 29 September 2023 Effective Date: 22 March 2024 Expiration Date: 27 September 2026 Revision Date: 22 March 2024 Dominic Townsend, President CORPORATE SUPPORT ACTIVITIES, DESIGN, MANUFACTURE AND DISTRIBUTION OF COLOUR AND ADDITIVE CONCENTRATES, THERMOPLASTIC RESINS AND PELLETS, SPECIALTY COMPOUNDS AND COLORANTS. Garibaldi 2405 Lomas de Zamora, Buenos Aires 1832 Argentina Activity: Manufacture of Colour and Additive Concentrates, Thermoplastic Resins and Specialty Compounds Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Colorants SA Parc Scientifique Fleming, Fond Jean Pâques 1 Louvain-La-Nueve, Walloon Brabant 1348 Belgium Facility: Avient Corporation - Maipu, Chile Camino a Melipilla 15.170 Maipu, Región Metropolitana de Santiago 9250000 Chile Activity: Design and Manufacture of Colour and Additive Concentrates, Activity: Design and Manufacture of Colorants and Additives Concentrates Facility: Avient Corporation - Lahore, Pakistan Plot no. 135, Kitaar, Bund Road Off Multan Road, Thokar Niaz Baig. WA-06, Kalyan-Padgha Road Vashere, Maharashtra 421302 Activity: Design and Manufacture of Colorants and Additives for Plastics Activity: Design & Manufacture of Color, Additive Concentrate & Specialty Facility: Avient Corporation - Suzano, Brasil Av.

Financials are pro forma for the acquisition of Dyneema® and potential divestiture of Distribution Avient Specialty Formulators Other Specialty / Chemical Companies 30 CULTURE AND PEOPLE 31 OUR SPECIALTY JOURNEY CONTINUES 32 • Dyneema® brings leading technology and brand with the World’s Strongest Fiber™, deep history of application development and strong management team focused on specialty applications • Dyneema® transaction is aligned with our previously stated acquisition goal of expanding our composites and fiber capabilities • Similar to our other technology expansion acquisitions, Dyneema® allows us to leverage our invest-to-grow strategy • We plan to explore a possible sale of our Distribution business. In addition, operating income before the effect of special items is a component of Avient’s annual and long-term employee incentive plans and is used in debt covenant computations. March 31, 2022 GAAP Special Adjusted Operating Income $ 128.6 $ 7.8 $ 136.4 Income before income taxes $ 111.1 $ 7.7 $ 118.8 Income tax expense - GAAP (26.6) — (26.6) Income tax impact of special items — (2.0) (2.0) Tax adjustments — 1.5 1.5 Net income attributable to noncontrolling interests (0.3) — (0.3) Net income attributable to Avient shareholders $ 84.2 $ 7.2 $ 91.4 EPS $ 0.91 0.08 $ 0.99 Weighted-average diluted shares 92.3 92.3 92.3 1 March 31, 2021 GAAP Special Adjusted Operating Income $ 120.4 $ 2.4 $ 122.8 Income before income taxes $ 102.6 $ 2.4 $ 105.0 Income tax expense - GAAP (22.9) — (22.9) Income tax impact of special items — (0.9) (0.9) Tax adjustments — 1.1 1.1 Net income attributable to noncontrolling interests (0.4) — (0.4) Net income attributable to Avient shareholders $ 79.3 $ 2.6 $ 81.9 EPS $ 0.86 0.03 $ 0.89 Weighted-average diluted shares 92.2 92.2 92.2 Year Ended December 31, 2021 GAAP Special Adjusted Operating income $ 381.2 $ 47.8 $ 429.0 Income from continuing operations before income taxes $ 304.6 $ 57.1 $ 361.7 Income tax expense - GAAP (74.0) — (74.0) Income tax impact of special items — (13.0) (13.0) Tax adjustments — 5.9 5.9 Net income attributable to noncontrolling interests 0.2 — 0.2 Net income from continuing operations attributable to Avient shareholders $ 230.8 $ 50.0 $ 280.8 EPS $ 2.51 0.54 $ 3.05 Weighted-average diluted shares 92.1 92.1 92.1 2 Reconciliation of EBITDA by Segment March 31, Year Ended 2022 2021 2021 Operating income: Color, Additives and Inks $ 94.5 $ 88.8 $ 303.1 Specialty Engineered Materials 39.7 34.2 132.0 Distribution 24.2 24.0 93.2 Corporate and eliminations (29.8) (26.6) (147.1) Operating income $ 128.6 $ 120.4 $ 381.2 Items below OI in Corporate: Other income, net $ (0.6) $ 1.5 $ (1.3) Depreciation & amortization: Color, Additives and Inks $ 26.0 $ 27.4 $ 105.7 Specialty Engineered Materials 7.8 7.8 31.7 Distribution 0.2 0.2 0.8 Corporate and eliminations 3.8 1.7 7.7 Depreciation & Amortization $ 37.8 $ 37.1 $ 145.9 EBITDA: Color, Additives and Inks $ 120.5 $ 116.2 $ 408.8 Specialty Engineered Materials 47.5 42.0 163.7 Distribution 24.4 24.2 94.0 Corporate and eliminations (26.0) (24.9) (140.7) EBITDA $ 165.8 $ 159.0 $ 525.8 Reconciliation of Sales, Operating Income and EBITDA - Distribution Year Ended 2006 2011 2016 Sales $ 732.8 $ 996.5 $ 1,071.0 Operating income 19.2 56.0 68.2 Depreciation & amortization 1.5 0.7 0.7 EBITDA $ 20.7 $ 56.7 $ 68.9 3 March 31, Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2022 2021 2021 Net income from continuing operations – GAAP $ 84.5 $ 79.7 $ 230.6 Income tax expense 26.6 22.9 74.0 Interest expense 16.9 19.3 75.3 Depreciation and amortization from continuing operations 37.8 37.1 145.9 EBITDA $ 165.8 $ 159.0 $ 525.8 Special items, before tax 7.7 2.4 57.1 Depreciation and amortization included in special items (2.1) (0.5) (1.7) Adjusted EBITDA $ 171.4 $ 160.9 $ 581.2 4 Masseto IR Presentation - Final.pdf Avient Corporation �specialty Portfolio Transformation Continues with Dyneema Acquisition DISCLAIMER Slide Number 3 Slide Number 4 Slide Number 5 Q1 2022 SALES AND OPERATING INCOME�(Total Company) Slide Number 7 Slide Number 8 Slide Number 9 Slide Number 10 FIT with Four Pillar Strategy Dyneema® overview Slide Number 13 Slide Number 14 Dyneema® in the Value Chain Demand trends Products Avient’s Existing Composites Portfolio Avient’s Composites Portfolio�Sales and Ebitda Distribution Divestiture Considerations Distribution highlights Dyneema® Transaction Overview Capital structure / Leverage Two-Year Leverage Goal Pro forma modeling Our Specialty Journey Acquisition History Clariant Color Acquisition Specialty Transformation 2022 ebitda margins vs. peers Culture and People Our Specialty Journey continues Slide Number 33 Avient Acquisition of Dyneema and Q1 2022 Results.pdf Masseto IR Presentation - 4.19 (515pm) - with attachments.pdf

These connectors often provide signal dampening that unnecessarily exceeds the needs of the application. In addition, they are costly to manufacture, which makes them economically unfeasible for use in low-cost computers. THE IMPACT Avient’s solution was a unique, nylon-based material that met the all of the application’s performance requirements.

In addition, a recording of the audio will be available for one week, beginning at

Our expanding portfolio includes colorants, advanced composites, functional additives, engineered materials, and Dyneema®, the world’s strongest fiber™. 

In addition, a recording of the audio will be available for one week, beginning at

In addition to communicating fourth quarter and full year 2020 performance, we will use the webcast to update investors and analysts on the Clariant Masterbatch integration and synergy capture, which is ahead of schedule, and introduce growth projections for 2021."