If authorized representative is a business entity, not an individual, then please print the business name in the "signature" box, an authorized representative of the business entity must sign in the "By" box and print their name in the "Print Name" box. James S T A T E OF O H I O C E R T I F I C A T E Ohio Secretary of State, Frank LaRose 4463782 It is hereby certified that the Secretary of State of Ohio has custody of the business records for and, that said business records show the filing and recording of: AVIENT CORPORATION United States of America State of Ohio Office of the Secretary of State Witness my hand and the seal of the Secretary of State at Columbus, Ohio this 23rd day of April, A.D. 2020. The fees are as follows: Expedite 1 $100 2 Business Days Expedite 2 $200 1 Business Day Expedite 3 $300 4 Business Hours 2.

Beggs joined Avient in August 2020 and has more than 20 years of experience in finance and business leadership roles in both public and private organizations with an emphasis on specialty materials and diverse end markets. She previously served as chief financial officer of Hunt Consolidated, Inc., a diversified holding company whose businesses served many industries including energy, real estate and private investments. Prior to Hunt, she worked for Celanese Corporation, where she served in a variety of finance and business positions, including vice president and corporate treasurer, and earlier as chief financial officer of the materials solutions business.

WHAT WE DO: MATERIAL SCIENCE 4 CUSTOM FORMULATION SUSTAINABILITY FOR A BETTER TOMORROW Revenue From Sustainable Solutions* 2016-2021 $310 205 140 80 75 45 40 20 $915M2021 Sales *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Color business Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 5 Key Updates • Provided progress on 2030 Sustainability Goals • Emphasized commitment to U.N. Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies 11.9% 16.3% 2019PF 2022E EBITDA Margins CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORIC SPECIALIZATION THROUGH M&A 13 Distribution DSM Protective BOLT-ON ACQUISITION HISTORY 14 Commercial Resources Operating Income Operating Margins 259 363 $40 $139 Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W SPECIALTY TRANSFORMATION T O D A Y 46% 67% 86% 0% 60% 80% 2005 2010 2019 2021 2022 PF % o f A d ju st ed E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Building & 43% 14% Telecom. 2% 2006 2022 Pro Forma 21% Building & Telecom. EBITDA Margins • Focus on organic growth combined with transformative and bolt-on acquisitions • Divested commodity businesses tied to more cyclical end markets • Expanded presence in high growth areas of sustainable solutions, specialty healthcare applications, composites and more resilient end markets 5.4% 11.5% 16.1% 2006 2018 2022PF $142 $408 $585 2006 2018 2022PF 2006 figures exclude joint venture results 19 RETURNING CASH TO SHAREHOLDERS Growing Dividend 0.1 0.1 0.2 0.5 0.6 0.7 0.8 0.9 0.9 1.0 1.0 1.0 11 12 13 14 15 16 17 18 19 20 21 22 0.16 0.20 0.26 0.34 0.42 0.50 0.58 0.72 0.79 0.81 0.85 0.95 0.99 11 12 13 14 15 16 17 18 19 20 21 22 23 ~$1Bn REPURCHASED OVER LAST 11 YEARS ~$550MM PAID OVER LAST 11 YEARS Dividends Share Repurchases Cumulative Buybacks $B n $ p e r sh ar e 2022 PRO FORMA ADJUSTED EPS Earnings Growth Expanding Profitability $0.15 $1.09 $2.08 $2.67 2009 2012 2015 2018 2022PF T H IR D Q UART ER 2022 RE S U LTS $110 $119 $0.61 $0.59 Q3 2022 PERFORMANCE (TOTAL COMPANY CONT.

WHAT WE DO: MATERIAL SCIENCE 4 CUSTOM FORMULATION SUSTAINABILITY FOR A BETTER TOMORROW Revenue From Sustainable Solutions* 2016-2021 $310 205 140 80 75 45 40 20 $915M2021 Sales *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) **2020 is Pro Forma to include full year of the Clariant Color business Future Growth Revenue Assumptions From Sustainable Solutions: 8 - 12% 5 Key Updates • Provided progress on 2030 Sustainability Goals • Emphasized commitment to U.N. Purchase price multiple rapidly declining on strength of business and synergy capture 12 $133 $201 2019PF 2022E 12 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.4x 2019PF 2021 2022E w/ Full Synergies 11.9% 16.3% 2019PF 2022E EBITDA Margins CLARIANT COLOR: TRANSFORMATIONAL ACQUISITION (1) Financial information is pro forma to include a full year of Clariant Color business SUNBELT PVC Resins DSS 20 Acquisitions $4.8B Investment $2.7B of Annual Revenue 5 Divestments $2.3B Proceeds TPE PP&S HISTORIC SPECIALIZATION THROUGH M&A 13 Distribution DSM Protective BOLT-ON ACQUISITION HISTORY 14 Commercial Resources Operating Income Operating Margins 259 363 $40 $139 Established Acquisitions (> 7 years) + 40% + 248% + 1300 bps I N V E S T T O G R O W SPECIALTY TRANSFORMATION T O D A Y 46% 67% 86% 0% 60% 80% 2005 2010 2019 2021 2022 PF % o f A d ju st ed E B IT D A • Commodity JVs • Distribution • Performance Products & Solutions • Specialty Businesses (1) Adjusted EBITDA is EBITDA excluding corporate costs and special items (2) Pro forma for the acquisition of Dyneema® and divestiture of Distribution (1 ) (2) 15 Building & 43% 14% Telecom. 2% 2006 2022 Pro Forma 21% Building & Telecom. EBITDA Margins • Focus on organic growth combined with transformative and bolt-on acquisitions • Divested commodity businesses tied to more cyclical end markets • Expanded presence in high growth areas of sustainable solutions, specialty healthcare applications, composites and more resilient end markets 5.4% 11.5% 16.1% 2006 2018 2022PF $142 $408 $585 2006 2018 2022PF 2006 figures exclude joint venture results 19 RETURNING CASH TO SHAREHOLDERS Growing Dividend 0.1 0.1 0.2 0.5 0.6 0.7 0.8 0.9 0.9 1.0 1.0 1.0 11 12 13 14 15 16 17 18 19 20 21 22 0.16 0.20 0.26 0.34 0.42 0.50 0.58 0.72 0.79 0.81 0.85 0.95 0.99 11 12 13 14 15 16 17 18 19 20 21 22 23 ~$1Bn REPURCHASED OVER LAST 11 YEARS ~$550MM PAID OVER LAST 11 YEARS Dividends Share Repurchases Cumulative Buybacks $B n $ p e r sh ar e 2022 PRO FORMA ADJUSTED EPS Earnings Growth Expanding Profitability $0.15 $1.09 $2.08 $2.67 2009 2012 2015 2018 2022PF T H IR D Q UART ER 2022 RE S U LTS $110 $119 $0.61 $0.59 Q3 2022 PERFORMANCE (TOTAL COMPANY CONT.

IATF Certificate CH-S 证书制作地点及日期: 证书认可签发机构: Katy, TX, 2024年12月 10日 DNV - Business Assurance 1400 Ravello Drive, Katy, TX, 77449-5164, USA Sherif Mekkawy 管理代表 未履行认证协议中规定条款会导致此证书失效，获证组织必须定期接受监督审核并经审核合格此证书方继续有效。 获得认可的单位: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com 管理体系认证证书 证书号码: 273138-2018-AQ-RGC-IATF IATF证书号码: 0558323 有效期限: 2024年12月 10日 – 2027年12月 09日 兹证明 普立万聚合体（深圳）有限公司 中国广东省深圳市宝安区沙井镇蚝乡路启航工业园1号 518104 统一社会信用代码：9144030076498189X0(USI: C5M65R) 外部支持场所： 见附页 质量管理体系符合 : IATF 16949:2016 此证书对下列范围有效: 塑料改性材料的设计和制造 豁免：无 http://www.dnv.com 证书号码: 273138-2018-AQ-RGC-IATF IATF证书号码: 0558323 证书制作地点及日期: Katy, TX, 2024年12月 10日 未履行认证协议中规定条款会导致此证书失效，获证组织必须定期接受监督审核并经审核合格此证书方继续有效。 获得认可的单位: DNV Business Assurance USA Inc., 1400 Ravello Drive, Katy, TX, 77449-5164, USA - TEL: +1 281-396-1000. www.dnv.com 页 2 / 2 证书附页 普立万聚合体（深圳）有限公司 外部支持场所： 场所名称 场所地址 外部支持场所活动 认证机构 普立万企业管理（上海）有限公司 中国上海浦东金桥经济开发技术区 金苏路200号C幢2楼 201206(USI: PKFHC3) 产品设计，过程设计 DNV 普立万聚合体（苏州）有限公司 中国江苏省苏州工业区胜港街77号 215127(USI: CF4943) 合同评审，销售，供应商管理 DNV http://www.dnv.com

titel 20 21 -0 4- 12 1 4: 06 :2 8 Business Register extract Netherlands Chamber of Commerce CCI number 34246357 Page 1 (of 2) Legal entity RSIN 815617781 Legal form Besloten Vennootschap (comparable with Private Limited Liability Company) Statutory name Avient Colorants Netherlands B.V. This extract has been certified with a digital signature and is an official proof of registration in the Business Register. Business Register extract Netherlands Chamber of Commerce CCI number 34246357 Page 2 (of 2) N/A 2021-04-12T14:06:40+0200 Utrecht Kamer van Koophandel Dit document is digitaal ondertekend 2021-04-12T14:06:42+0200

Versaflex™ PF formulations are specially developed for the manufacture of co-extruded surface protective films Read how technical expertise and broad TPE portfolio shortened the development timeline and delivered a durable performance Sync design with manufacturability: Learn about how Avient Design can help simplify your new product development process

Versaflex™ PF formulations are specially developed for the manufacture of co-extruded surface protective films Read how technical expertise and broad TPE portfolio shortened the development timeline and delivered a durable performance Sync design with manufacturability: Learn about how Avient Design can help simplify your new product development process

https://entreprises.revenuquebec.ca/EntNa/SX/SX00/SX00.SXCLT20A You can use this service to validate a business’s QST registration number. Registration number 1019288451 TQ 0004 Status Valid Effective date of status 2017-08-01 Date viewed 2021-02-04 Business's name AVIENT CANADA ULC Business name SPARTECH PLASTIQUES Registration number to validate 1019288451TQ0004 Page 1 of 1Validate a QST Registration Number - Revenu Québec 2/4/2021https://entreprises.revenuquebec.ca/EntNa/SX/SX00/SX00.SXCLT20A.ValiderInscription/...

Merklein joined Avient in July of 2020 through the acquisition of the Clariant Masterbatch business. Merklein previously served in management positions at Clariant International, Ltd., including Head of Group Procurement; Vice President, Business Line Plastics and Special Applications, and Head of Region Europe for the Pigments and Additives Division. Merklein studied and graduated in Business Administration from IHK Frankfurt institution in Germany.