BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF AMENDMENT OF “CLARIANT PLASTICS & COATINGS USA LLC”, CHANGING ITS NAME FROM "CLARIANT PLASTICS & COATINGS USA LLC" TO "AVIENT COLORANTS USA LLC", FILED IN THIS OFFICE ON THE ELEVENTH DAY OF JANUARY, A.D. 2021, AT 10:39 O`CLOCK A.M.

G1QCertificate Number: 82756 Certificate of Incorporation on Change Of Name For Registrar of Companies I hereby certify that CLARIANT PLASTICS & COATINGS (IRELAND) LIMITED having, by a Special Resolution of the Company, and with the approval of the Registrar of Companies, changed its name, is now incorporated as a LTD - Private Company Limited by Shares under the name AVIENT COLORANTS IRELAND LIMITED and I have entered such name on the Register accordingly.

What role do color and additives play in recyclability? NOTE: On July 1, 2020, PolyOne and Clariant Masterbatches joint together as Avient, a new kind of materials company focused on conquering customer challenges and unlocking the potential for innovation and sustainability around the globe. 

F548 White Foam / Clariant WHITE PP FR 8-6 LMS-1000

MB CLARIANT WHITE VER. 3 ALCON WHITE PP FR 8-6 LMS-1000

& Canada 64% 36% Specialty Engineered Materials Color Additives and Inks 40% 37% 18% 9% 4% 4% Building & Energy Telecom Geography Segment Industry 4 CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. GUIDANCE $800 $754 $128 $123 Sales Adjusted EBITDA $0.56 $0.57 13 • Demand impacted by destocking and cautious customer sentiment • Positive net price benefit: o CAI - Pricing flat and raw material deflation o SEM - Pricing flat with unfavorable mix related to healthcare, more than offset with raw material deflation • Cost reductions driven by Clariant synergies and reduced administrative costs Q3 EBITDA BRIDGE ($ millions) CAI: Price / Mix -) Deflation 22) SEM: Price / Mix (6) Deflation 13) Net Price Benefit 29) Cost Reductions 13) Wage Inflation (8) FX 1) Q3 2023 Actual $ 123) Adjusted EBITDA Q3 2022 Pro Forma $ 137) Demand (49) 14 2023 G U I DAN CE Q4 2023 GUIDANCE VS. Avient reflects 2023 adjusted EBITDA guidance of $500M and estimated run-rate CAPEX of $110M. 2023E (%) 27 78 89 84 82 80 77 88 81 76 70 69 60 54 (6) Av ie nt PP PM FM C C Avient Specialty Other Specialty / MULTIPLE EXPANSION Note: Avient reflects 2023 adjusted EBITDA guidance of $500M and closing share price of $31.18.

NORBERT MERKLEIN Vice President and General Manager EMEA, Color, Additives and Inks Norbert Merklein serves as vice president and general manager for the Europe, Middle East and Africa (EMEA) region of Color, Additive and Inks at Avient Corporation, a premier provider of specialized and sustainable material solutions and services. 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.

LABORATORY EQUIPMENT MANUFACTURER P C R W E L L P L A T E S • Very high level of TiO2 to prevent “cross-talk” between the wells during the qPCR fluorescence testing procedure • Minimized background phosphorescence caused by agglomeration of TiO2 and/or oxidized (stressed) polystyrene • Preservation of polystyrene grade properties • Change control of formulation and manufacturing process • Robust product quality from batch to batch • Developed optimally dispersed, ready-to-use white formulation that maintains adequate signal transmission, as well as minimizing “cross-talk” and background phosphorescence • Optimized the use of general purpose polystyrene (GPPS) for a good balance between melt flow and other physical properties, such as stiffness • Provided comprehensive change control of raw materials and formulation, with a robust manufacturing process and quality control under a third party ISO 13485:2016 certified QMS Mevopur Healthcare Colorants and Formulations – pre-colored solution WHY AVIENT? https://www.avient.com/products/polymer-colorants/healthcare-colorants/mevopur-healthcare-colorants-and-formulations Slide 1: laboratory equipment manufacturer

& Canada 64% 36% Specialty Engineered Materials Color Additives and Inks 37% 9% 4% 4% Building & Energy Telecom 4 CREATING A WORLD-CLASS SUSTAINABLE ORGANIZATION 1. 6.5% annualized long term sales growth leveraging sustainable solutions, composites, healthcare and emerging regions 2. GUIDANCE 12 14.8% 15.8% Adjusted EBITDA Margin % Better-than-expected margins driven by: • Resilient demand for composites and sustainable solutions which improved mix of higher margin applications • Deceleration of raw material inflation • Cost reduction activities Q1 EBITDA BRIDGE 13 $ millions CAI: Price / Mix 19) Inflation (4) SEM: Price / Mix 6) Inflation (4) Net Price Benefit 17) Wage and Energy Inflation (13) Cost Reductions 8) FX (6) Q1 2023 Actual $134) Adjusted EBITDA Q1 2022 Pro Forma $ 176) Demand (48) • Weak demand conditions in-line with previous expectations • Pricing continues to cover inflation of raw materials, wages and energy U.S. & Canada 38% 17% Q1 2023 SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS 23% Building and 6%Telecommunications END MARKET REVENUE (1) Total company sales and adjusted EBITDA of $846M and $134M, respectively, include intercompany sales eliminations and corporate costs $537M $91M $310M $64M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $134M$846M (1) 14 Q1 2023 SALES BY REGION Yo Y C H A N G E ( E X C L . Three Months Ended March 31, 2023 Three Months Ended March 31, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 20.8 $ 0.23 $ 64.4 $ 0.70 Special items, after tax 22.3 0.24 6.4 0.07 Amortization expense, after-tax 15.1 0.16 $ 10.8 $ 0.12 Adjusted net income / EPS $ 58.2 $ 0.63 $ 81.6 $ 0.89 March 31, Reconciliation of Pro Forma Sales 2023 2022 Sales $ 845.7 $ 892.2 APM pro forma adjustments — 94.9 Pro forma sales $ 845.7 $ 987.1 1 Three Months Ended Reconciliation to EBITDA and Adjusted EBITDA: 2023 2022 Net income from continuing operations – GAAP $ 21.3 $ 64.7 Income tax expense 7.7 20.0 Interest expense, net 28.8 16.9 Depreciation and amortization 50.5 37.6 EBITDA from continuing operations $ 108.3 $ 139.2 Special items, before tax 27.3 6.7 Depreciation and amortization included in special items (1.8) (2.1) Adjusted EBITDA $ 133.8 $ 143.8 Pro forma APM adjustments — 32.0 Pro forma adjusted EBITDA $ 133.8 $ 175.8 Pro forma adjusted EBITDA as a % of sales 15.8 % 17.8 % 2023 2022 Sales: Color, Additives and Inks $ 537.0 $ 649.5 Specialty Engineered Materials 309.7 243.1 Corporate (1.0) (0.4) Sales $ 845.7 $ 892.2 Operating income: Color, Additives and Inks $ 65.6 $ 94.5 Specialty Engineered Materials 43.1 38.3 Corporate (51.6) (30.6) Operating income $ 57.1 $ 102.2 Depreciation & amortization: Color, Additives and Inks $ 25.8 $ 26.0 Specialty Engineered Materials 21.2 7.8 Corporate 3.5 3.8 Depreciation & Amortization $ 50.5 $ 37.6 Earnings before interest, taxes, depreciation and amortization (EBITDA): Color, Additives and Inks $ 91.4 $ 120.5 Specialty Engineered Materials 64.3 46.1 Corporate (48.1) (26.8) Other income (expense), net 0.7 (0.6) EBITDA $ 108.3 $ 139.2 AVNT June IR Conferences w Non GAAP Recs.pdf AVNT Q1 2023 Earnings Presentation.pdf AVNT Q1 2023 Earnings Presentation 5.2 221pm IR Deck - AVNT-2023.03.31 (002).pdf

PVC WHITE ESO MB CLARIANT WHITE VER. 2 PP FR 8-6 LMS-1000