Figure 1. Regarding tensile properties, three additional categories granted positive marks: 1. REFERENCES 1.

Page 1 of 4 https://abs.ez2xs.com https://abs.ez2xs.com ISO 9001:2015 Certificate Of Conformance ANNEX Certificate No.: 65799 Avient Corporation At the below facilities FACILITY NAME FACILITY ACTIVITY ADDRESS Avient Corporation - Avon Lake, OH Management of QMS, Design and manufacture of colour and additive concentrates, thermoplastic resins and specialty compounds 33587 Walker Road Avon Lake OH 44012 United States Avient (Argentina) SA Administration, Site management, Manufacture, Laboratory (QC and Colormatching), Procurement, Maintenance, Infrastructure, Warehouse and Transport, Sales Av. José Garibaldi 2401 1832 Lomas de Zamora Argentina Avient Austria GmbH Administration Alfred Feierfeilstraße 3 2380 Perchtoldsdorf Austria Avient Colorants Belgium SA Site management, CSD – Customer Services, Manufacture, Laboratory, Supply Chain Management, Maintenance, Infrastructure, Warehouse and Transport Parc Scientifique Fleming, Fond Jean Pâques 1 1348 Louvain-la-Neuve Belgium Avient Colorants Brasil Ltda. Kalisabi No. 1, Kec.

Avient acquired the Clariant Color business on July 1, 2020 (the “Acquisition Date”). We are Avient. 6 BETTER TOGETHER: POLYONE AND CLARIANT COLOR Key Financial Data 2021 Sales $4.8 billion 2021 EBITDA $581 million 87% of EBITDA from specialty applications 2021 PE RF O RM AN CE $80 $85 2020 2021 $0.52 $0.58 2020 2021 Q4 2021 PERFORMANCE (TOTAL COMPANY) 8 Sales Adjusted Operating Income $997 $1,202 2020 2021 + 21% Adjusted EPS + 6% + 12% (in millions) (in millions) $308 $429 2020PF 2021 $1.93 $3.05 2020PF 2021 FULL YEAR 2021 PERFORMANCE (TOTAL COMPANY) 9 Sales Adjusted Operating Income $3,783 $4,819 2020PF 2021 + 27% Adjusted EPS + 39% + 58% (in millions) (in millions) (1) Financial information is pro forma to include a full year of Clariant Color business (1) (1) (1) FULL YEAR 2021 SEGMENT PERFORMANCE 10 CAI $2,043 $2,402 Sales ($ in millions) SEM Distribution $226 $303 Operating Income + 18% + 34% $1,110 $1,631 Sales $70 $93 Operating Income + 47% + 33% (1) $709 $919 Sales $94 $132 Operating Income + 30% + 40% (1) Financial information is pro forma to include a full year of Clariant Color business (1) Full Year 2020 (Pro forma) $3,783 $308 Sustainable Solutions 147 19% 60 Healthcare 143 28% 30 Composites 58 43% 29 Growth in Asia / LATAM 107 21% 26 Other 543 30% 58 Sub-total $4,781 26% $511 Wage Inflation and Overtime (39) Other Supply Chain Costs (15) COVID Response Applications (22) (12) Synergies 44 FX, Incentives, Other Employee Costs 60 (60) Full Year 2021 $4,819 27% $429 FULL YEAR 2021 SALES AND OPERATING INCOME (TOTAL COMPANY) 11 Sales Growth Rate Adjusted Operating Income$ millions (1) Financial information is pro forma to include a full year of Clariant Color business (1) Adjusted EBITDA 12 Full Year 2020 (Pro forma) $ 457 Demand 135 $ millions CAI: Price / Mix 158 Inflation (120) SEM: Price / Mix 84 Inflation (65) Distribution: Price / Mix 318 Inflation (304) Net Price Benefit 71 Wage Inflation and Overtime (39) Other Supply Chain Costs (15) COVID Response Applications (12) Synergies 44 Incentives, FX, Other Employee Costs (60) Full Year 2021 $ 581    (1) Financial information is pro forma to include a full year of Clariant Color business (1) • Demand impact driven by growth in key focus areas: sustainable solutions, healthcare, composites and growth in Asia / LATAM • Price increases more than offset raw material and supply chain impacts FULL YEAR 2021 EBITDA BRIDGE SPECIALTY EBITDA MARGIN EXPANSION 13 CAI (1) 2018-2020 financial information is pro forma to include a full year of Clariant Color business 15.3% 15.2% 16.2% 17.0% 2018 2019 2020 2021 14.8% 15.2% 17.6% 17.8% 2018 2019 2020 2021 (1) SEM • Record margins in 2021 despite unprecedented supply chain challenges • Continued portfolio transformation to high-growth end markets and sustainable solutions • Clariant Color synergy realization • Investments in composites and outdoor high performance applications drove growth and mix improvements • 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 • $54 million of synergies realized in 2021 • Acquisition completed on July 1, 2020 for $1.45 billion. OUR VALUATION VERSUS PEERS Avient Specialty Formulators Other Chemical/Specialty Companies 5.4 8.5 10.1 10.0 15.7 15.0 14.2 12.7 10.2 25.0 19.7 17.7 13.2 12.3 10.0 9.9 8.9 8.5 8.3 6.6 A vi en t (2 01 1) A vi en t (2 01 6) A vi en t (2 02 1) A vi en t (T o da y) R P M K W R P P G A V Y F U L A L B E C L H X L A S H F M C B N R E M N U N V R C E S C L H U N Historic Multiple SUMMARY: WHY INVEST IN AVIENT?

No. 0514.01) 12/11/2023 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 AVIENT CORPORATION – ANALYTICAL SOLUTIONS 33587 Walker Road Avon Lake, OH 44012 Stephanie Mims Phone: 440 930 3499 MECHANICAL Valid To: September 30, 2025 Certificate Number: 0514.01 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following rubber and plastics tests: Test Description Test Method or Standard Brittleness Temperature (Impact) ASTM D746; ISO 812 Charpy Impact ISO 179-1 Color Determination by Spectrophotometer ASTM D2244, E1331; ISO 7724 Conditioning of Plastics for Testing ASTM D618; ISO 291 Deflection Temperature Under Flexural Load ASTM D648; ISO 75-1, -2 Durometer Hardness (Shore A and D) ASTM D2240; ISO 7619-1 Flexural Properties ASTM D790; ISO 178 Flow Rate (Extrusion Plastometer) ASTM D1238 (Procedures A and B); ISO 1133 Impact Resistance (Izod) ASTM D256; ISO 180 Instrumented Impact ASTM D3763; ISO 6603-2 Specific Gravity/Density ASTM D792 (Method A); ISO 1183-1 Specular Gloss ASTM D523; ISO 2813 Tackiness of Interior Materials BO 061-01 Tear Resistance ASTM D624, D1004; ISO 34 Tensile Properties ASTM D412 (Method A), D638, D882; ISO 37, 527-1, -2, -3, -4, -5 Xenon-Arc Exposure Testing ASTM D2565, G155; SAE J1885 (Withdrawn January 2008), J1960 (Withdrawn January 2008), J2412, J2527; BO-116-01 For the tests to which this accreditation applies, please refer to the laboratory’s Mechanical Scope of Accreditation.

This literature shall NOT operate as permission, recommendation, or inducement to practice any patented invention without permission of the patent owner. www.polyone.com Specialty Inks Global Headquarters and Manufacturing Plant 8155 Cobb Center Drive Kennesaw, GA 30152 Phone: +1 800.326.0226 Wilflex Warehouse Knowsley, Merseyside, L34 9GT Unity Grove, Knowsley Business Park Phone: +44 151 547 3800 Rutland Manufacturing Plant 10021 Rodney Street Pineville, NC 28134 Phone: +1 704.553.0044 Toll Free: +1 800.438.5134 Union Ink Manufacturing Plant 10021 Rodney Street Pineville, NC 28134 Phone: +1 704.553.0046 Toll Free: +1 800.438.5134 QCM Manufacturing Plant 10021 Rodney Street Pineville, NC 28134 Phone: +1 704.553.0046 Toll Free: +1 800.438.5134 Printop Manufacturing Plant Sociedad Química Alemana S.A. Revolución 842, Zona Industrial Ventanilla - Callao, Lima - Perú Phone: +51.1.613.4242 Rutland/Union Ohio Service Center 777-M-N Dearborn Park Lane Worthington, OH 43085 Phone: +1 614.846.3055 Rutland/Union Warehouse 28 Eldon Way Paddock Wood Kent TN12 6BE UK Phone: +44.0.1892.834.555 Rutland/Union/Wilflex Manufacturing Plant No. 1 QiHang Industrial Park HaoXiang Road, Shajing Town, BaoAn District Shenzhen, China, 518104 Phone: +86.755.2969.2888 Specialty Inks

ITEM 1. Newlin, certify that: 1. Richardson, certify that: 1.

ITEM 1. Patterson, certify that: 1. Committee: 2 COMMITTEES 1.

On December 1, 2023, Mr. Kunkle — 4,022(1) 321,750(1) 643,500(1) — — — — — — 28,875(2) 231,000(2) 462,000(2) — — — — — 2/17/2023 — — — 7,083(3) 21,250(3) — 42.93 269,117 11/1/2023 — — — (4) (4) — 42.93 95,223 11/1/2023 — — — (4) (4) — 52.64 27,135 11/1/2023 — — — (4) (4) — 42.27 5,130 2/17/2023 — — — — — 6,300(6) — 270,459 11/1/2023 — — — — — (7) — 151,675 11/1/2023 — — — — — (7) — 69,605 11/1/2023 — — — — — (7) — 15,354 R.M. Patterson was our First PEO from January 1 - December 1.

Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. WHAT WE DO: MATERIAL SCIENCE 5 CUSTOM FORMULATION FE BRUARY 1 5 , 2023 W EB CAS T Q4 2022 VS. EBITDA Margins (1) 5.4% 11.5% 16.2% 2006 2018 2022PF $142 $408 $592 2006 2018 2022PF 2006 figures exclude joint venture results 2022 pro forma for the acquisition of Avient Protective Materials Adj.

Petrem Elšíkem, notářem se sídlem v Litoměřicích, na místě samém v sídle PRK Partners s.r.o. advokátní kancelář, na adrese Jáchymova 26/2, Staré Město, 110 00 Praha 1, dle § 80a a násl. notářského řádu o ---------------------------------------------------------------------------------------------------------------------- r o z h o d n u t í valné hromady společnosti PolyOne ČR, s.r.o., identifikační číslo 26689537, sídlem Pobřežní 620/3, Karlín, 186 00 Praha 8, spisová značka C 87503 vedená u Městského soudu v Praze (dále též „Společnost“), o změně obsahu společenské smlouvy (dále též „Rozhodnutí“), konané dne 21.10.2021 v budově na adrese Jáchymova 26/2, Staré Město, 110 00 Praha 1. ------------------ I. 1. Kateřina Hájková, LL.M., datum narození 03.06.1982, adresa místa pobytu Křižíkova 220/91, Karlín, 186 00 Praha 8, advokáta, evidenční číslo ČAK 13682, spolupracujícího s PRK Partners s.r.o., advokátní kancelář, IČO 266 92 392, se sídlem Jáchymova 26/2, Staré Město, 110 00 Praha 1 (dále též „Předsedající“). Valná hromada Společnosti svým usnesením přijala toto --------------------------------------- r o z h o d n u t í o změně obsahu společenské smlouvy: a)Společenská smlouva Společnosti se mění tak, že v článku prvním „Obchodní firma, založení, vznik a právní forma společnosti“ odst. 1. a 2. nově zní takto: ---------------------- 1.