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.

Recycling trials taking into consideration standard recycling protocols can be run to provide a real- world recyclability evaluation.

PROXY SUMMARY 4 PROXY STATEMENT 2022 | Annual Meeting of Shareholders OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. Former Directorships: • WESCO International, Inc. Eastman Chemical Company RPM International Inc.

Ai sensi dell'art. 71 del R.D. 10 settembre 1914 n. 1326, il Comparente dichiara che il deposito avviene nell'interesse della detta società "PolyOne S.à r.l Imposte e spese del presente atto sono a carico della socie- tà "PolyOne S.à r.l.".

Truly global • Technology platform and expertise – Combining the best from two global leaders creates an unmatched portfolio of products and solutions • Global and local accounts – Combining our legacies’ business, dealing with large key accounts and a broad base of regional customers, creates ample opportunities for growth and industry partnering • Talent acquisition and retention – Our ‘best of both worlds’ leadership position helps us to attract and retain the best people in the industry • Cost and performance synergies – Alignment of site structures and technical & commercial organizations is driving a positive cost position An Excellent Fit Avient Corporation 16 • Dedicated global organization • Full suite of performance products • Excellent product stewardship expertise • High quality technical organization • Strong focus on innovation and sustainability • Strong customer relationships and global industry partnerships • Global footprint What Legacy Clariant Color Brings Avient Corporation 17 Customer orientation and dedication Aesthetics + Product Functionality Innovation and Sustainability Safety First o Both ACC Responsible Care® companies o Legacy and continued focus on safety Retain All Customers and Existing Business o Minimize integration disruptions o Broadened portfolio of specialty solutions o World class products and service Retain All Key Employees o Talented, passionate, and collaborative o Supportive, high-performance culture Principles of Integration Avient Corporation 18 $85M Cost • Barrier technology • Functional additives • Processing aids • Flame retardants • Light-weighting Complementary Technologies • Clariant’s approved formulations and certified facilities • Legacy PolyOne’s leading share in distribution channels Healthcare • Clariant’s position in SE Asia, Latin America, Germany & Italy • Legacy PolyOne’s position in U.S., Canada and China Regional Strengths • Solutions with Avient’s engineered materials customers • Avient’s distribution channels Segment Cross-selling Revenue synergy opportunities of $75M The complementary aspects of our combined businesses are unquestionable. Fostering imagination • Enabling creative exploration • Focus on customers’ sustainability • Driving long-term revenue growth ColorWorks Avient Corporation 21 • Rapid customer response • Immediate color measurement and quotation • Fast track product development to “now” • Specialized labs for fast sample delivery • Optimized formulations leveraging cost effective raw materials C U S T O M E R - F O C U S E D C O L O R F O R M U L A T I O N Avient Corporation 22 InstaColr CycleWorks A D V A N C I N G T H E C I R C U L A R E C O N O M Y • Laboratory mimics real-world circular recycling in a research environment • Conducts chemistry testing to improve plastics recycling for customers • Screening and evaluation of additive and colorant systems during recycling • Collaboration platform for customers and value chain partners Avient Corporation 23 Avient Corporation 24 Michael Garratt and Walter Ripple Our Sustainability Promise As the world’s premier provider of specialized polymer materials, services and solutions, Avient is committed to meeting the needs of the present without compromising future generations’ ability to meet their needs. GDP Growth Avient Historic Growth Future Growth Assumptions Global Avient: 2.7% Asia / LATAM: 5.0% Source: International Monetary Fund, World Economic Outlook Database (April 2021) 12% organic CAGR Figures above include relevant sustainable solutions, healthcare and composites sales Avient Corporation 120 8-10% (5% CAGR excluding Sustainable Solutions) Summary: Long-term Revenue Growth Drivers Avient Corporation 121 2021 Sales Estimate (Drivers) Overlap 2021 Sales Estimate Annual Growth Sustainable Solutions 930 - 930 8–12% Healthcare 685 (45) 640 8–10% Composites 260 (80) 180 10% Asia / LATAM 1,150 (310) 840 5% Other (GDP growth) 2,160 2–3% Avient $4,750 6.5% EBITDA Margin Expansion Goals CAI SEM • Continued portfolio transformation to high- growth end markets and sustainable solutions • Clariant Color synergy realization • Investments in composites and outdoor high performance applications drive growth and mix improvements Avient Corporation 122 17.0% 1.6% 1.0% 0.4% 2021E Synergies Sustainable Healthcare Goal 17.6% 0.9% 1.1% 0.4% 2021E Composites Sustainable Healthcare Goal Sustainable Path to Double Digit Earnings Growth Avient Corporation 123 Long-Term Sales Growth Rate Sustainable Solutions 8–12% Healthcare 8–10% Composites 10% Asia / LATAM 5% Other (GDP growth) 2–3% Avient 6.5% 10%+ Adjusted EBITDA growth 15%+ Adjusted EPS growth An Investment in Sustainable Growth Bob Patterson Avient Corporation 124 M&A Brings Avient New Technologies Avient Corporation 125 Technology Acquisition Technology Acquisition Thermoplastic Elastomers Liquid Color Concentrates & Additives Continuous Fiber Thermoplastic Composites Silicone Colorants & Formulations High-temperature Polymers & Fluoropolymers Long Fiber Reinforced (LFT) Thermoplastic Composites Fiber Solutions Water-based Inks Fiber & Healthcare Expertise, Liquid Additive Processing Aids, FR Additives, Recycling Innovations & More $133 $205 Clariant Color: Transformational Acquisition 126 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.0x 2019PF 2021E 2021E w/ Full • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • On-track to realize $52 million of expected synergies in 2021 • Acquisition completed on July 1, 2020 for $1.45 billion.

OUR COMPANY CULTURE Avient Corporation was originally established as PolyOne Corporation in 2000. EY has been retained as the independent registered public accounting firm for Avient and its predecessor companies, PolyOne Corporation and The Geon Company, continuously since 1993. Eastman Chemical Company RPM International Inc.

A European Parliamentary Research Service (EPRS) study found that the production of clothing and footwear is responsible for about 10% of annual carbon emissions – which is higher than all international flights and maritime shipping emissions combined – using around 79 billion cubic meters of water annually.

A European Parliamentary Research Service (EPRS) study found that the production of clothing and footwear is responsible for about 10% of annual carbon emissions – which is higher than all international flights and maritime shipping emissions combined – using around 79 billion cubic meters of water annually.

Solar power generation has experienced significant growth in the last few years, and according to the International Energy Agency (IEA), solar photovoltaic (PV) generation is set to increase further by record amounts.

Solar power generation has experienced significant growth in the last few years, and according to the International Energy Agency (IEA), solar photovoltaic (PV) generation is set to increase further by record amounts.