https://www.avient.com/investors 2 About Avient Avient Corporation (NYSE: AVNT), with expected 2021 revenues of $4.75 billion, provides specialized and sustainable material solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

Czech Republic Branch Sídlo: Pobřežní 620/3, Karlín, 186 00 Praha 8 Identifikační číslo: 074 10 026 Právní forma: Odštěpný závod zahraniční právnické osoby Předmět podnikání: Výroba, obchod a služby neuvedené v přílohách 1 až 3 živnostenského zákona Vedoucí odštěpného závodu:   LÁSZLÓ MEDNYÁNSZKY, dat. nar. 23. listopadu 1967 9400 Sopron, Ösvény 7, Maďarská republika Zřizovatel - zahraniční osoba: Avient S.à r.l. 9638 Pommerloch, Route de Bastogne 19, Lucemburské velkovévodství Registrační číslo: B226205 Právní forma: společnost s ručením omezeným Statutární orgán zřizovatele - zahraniční osoby:   HOLGER HANS KRONIMUS, dat. nar. 26. ledna 1968 76571 Gaggenau, Adolf Dambach-Strasse 2, Spolková republika Německo Den vzniku funkce: 4. července 2018 Den vzniku členství: 4. července 2018   CHRISTOPH PALM, dat. nar. 16. května 1963 9638 Pommerloch, Route de Bastogne 19, Lucemburské velkovévodství Den vzniku funkce: 4. července 2018 Den vzniku členství: 4. července 2018   ZANETA GABRIELA POTOCZNY, dat. nar. 17. října 1974 9638 Pommerloch, route de Bastogne 19, Lucemburské velkovévodství Den vzniku funkce: 27. února 2019 Den vzniku členství: 27. února 2019   NORBERT MERKLEIN, dat. nar. 3. května 1964 4132 Muttenz, Rothausstrasse 61, Švýcarská konfederace Den vzniku funkce: 18. ledna 2021 Den vzniku členství: 18. ledna 2021 Počet členů: 4 Společnost je platně vázána nebo zastupována vůči třetím osobám takto: má-li Společnost více než jednoho jednatele, pak podpisem kteréhokoli jednatele.

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PREPERM™ H Dielectric constant PREPERM™ Radome PREPERM™ High-temp PREPERM™ Flexible PREPERM™ Standard Grades for reflow soldering, temperature resistance for films and cables for ceramic replacement 2 7 12 17 22 Copyright © 2022, Avient Corporation.

CESA BLOCK – STANDARD OFFERINGS POLYMER FAMILY MATERIAL PRODUCT NAME DOSAGE Polyolefin PEA0820045 CESA Block PEA0820045 1–5% Polypropylene PPA0820056 CESA Block PPA0820056 1–5% Polyamide ABA0820022 CESA Block ABA0820022 2–6% Polyester NBA0820024 CESA Block NBA0820024 1–5% Styrenic SLA0820010 CESA Block SLA0820010 1–5% TPU RUA0820028 CESA Block RUA0820028 1–5% CESA Block additives can be used in combination with other CESA masterbatches, and formulations can be customized for most applications.

Issued on 2 August 20212 August 20212 August 20212 August 2021 . 2021-08-02T11:00:37+0800 The Government of the Hong Kong Special Administrative Region NG Ka Hung Paul Digitally signed by Companies Registry

Kedrowski Page 38 Operational Excellence • Operational Excellence is a never-ending quest for improvement in response to the voice of our customers and shareholders • It is all about strengthening our capabilities to deliver value flawlessly to our customers deliver value flawlessly to our customers • It challenges us to enhance our productivity, profitability, and efficiency in all phases of our business, from safety to quality to waste elimination to environmental stewardship Page 39 Lean Six Sigma Initiative • In 2009, Lean Six Sigma was launched to improve execution skills across all businesses, functions, and global regions • A company-wide diagnostic was conducted, resulting in identification of six conducted, resulting in identification of six strategic improvement platforms • Financial targets were estimated, resources identified and trained results delivered , Page 40 PolyOne OSHA Recordable Incidence Rate 4 5 6 5.1 Safety Performance *Rubber And Plastics Manufacturing Industry (2010 Bureau of Labor Statistics). 0 1 2 3 2005 2006 2007 2008 2009 2010 2011 Industry Average 1.4 1.3 1.1 1.1 0.85 0.65 0.57 Page 41 • Exemplary on-time delivery • Best-in-class working capital % of sales 81% 87% 88% 95% 93% 92% 94% 2005 2006 2007 2008 2009 2010 2011 On-Time Delivery* Lean Six Sigma Delivering Results • Approximately $200M in cash driven by working capital improvements 16.2% 14.4% 18.9% 11.7% 9.6% 9.6% 2006 2007 2008 2009 2010 2011 WC % of Sales 2005 2006 2007 2008 2009 2010 2011 *As measured to customer request date Page 42 40.0% Percent of Associates Trained in LSS World’s Best Start-up Program in 2009* World’s Best Business Process Excellence Program in 2012* Award-Winning Lean Six Sigma Program *Both awards received from International Quality and Productivity Center 16.5% 40.0% 2009 2011 Page 43 • Globally leverage strategic supplier management best practices • Implement world class demand management processes Critical Imperatives • Improve operational reliability and efficiencies • Optimize global freight management Drive 50 – 100 basis points of gross margin expansion per year Page 44 Page 45

Kahler (16) Page 16 • Shifted sales compensation practices to drive value and margin expansion • Significantly upgraded and added sales, marketing, and From Volume to Value $2,622 $3,060 Sales ($ millions) 2006 2011PFadded sales, marketing, and technical resources • Expanded global cross-selling • Invested in training and tools 3.3% 6.8% Adjusted OI% ($ millions) 2006 2011PF 2006 2011PF Page 17 • Value pricing practices enabled by use of EVE tools • Shifting the basis of competition to specialization 1.5% 8.9% Specialty OI% Specialization Drives Margin Expansion 2006 2011PF 7.2% PPS OI% competition to specialization differentiates PolyOne as a value-added solutions provider • Redirecting our technology and marketing focus to the most attractive segments 2.6% 5.6% 2006 2011 POD OI% 5.5% 7.2% 2006 2011 2006 2011 2006 2011 Page 18 • Global key account management team focused on key markets and strategic OEMs • Drive growth in target markets through application development750 1,120 Total Commercial Employees 2007 – 2011 49% Increase Commercial Excellence – Recent Investments *Includes ColorMatrix through application development • Leverage breadth of solutions across all PolyOne platforms to identify innovative solutions for strategic OEMs and Tier 1 partners * 750 2007 2011 Sales Marketing R&D/Tech Page 19 5% 1% 0% 27% 2% 12% 4% Performance Dashboards Drive Execution 45% 26% 18% 5% 55% Page 20 53% Drivers of Customer Loyalty Customer Experience is Key to Customer Loyalty 53% Building Customer Loyalty n = 4,960 B2B customers of 24 companies Source: Corporate Executive Board Company and Brand Impact Product and Service Delivery Value-to- Price Ratio Customer Experience Page 21 • Continue to redirect our focus to more attractive segments and increase customer loyalty and retention • Leverage new commercial tools and investments to enable disciplined execution and accountability Critical Imperatives to enable disciplined execution and accountability • Position PolyOne as the differentiated value-added specialty solutions provider Drive improved mix in all segments and achieve margin and profitability growth Page 22 Page 23

A webcast of the event can be also viewed live at www.avient.com/investors. 2 About Avient Avient Corporation (NYSE: AVNT) provides specialized and sustainable materials solutions that transform customer challenges into opportunities, bringing new products to life for a better world.

Performance Requirements • Physical performance • Fire performance (Euroclass) 2. The cable manufacturer is responsible for conducting such trials to determine the ECCOH™ grade suitable for the application. 1 CPR class indications are based values for a sheathing thickness of 1mm. 2 For LV sheathing, CPR class indications are based on a cable design without bedding or flame retardant insulation.