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. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. Three Months Ended December 31, 2023 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income (loss) from continuing operations attributable to Avient shareholders $ 27.8 $ 0.30 $ (17.0) $ (0.19) Special items, after tax (Attachment 3) 5.4 0.06 38.3 0.42 Amortization expense, after-tax 15.0 0.16 14.6 0.16 Adjusted net income / EPS $ 48.2 $ 0.52 $ 35.9 $ 0.39 (1) Per share amounts may not recalculate from figures presented herein due to rounding Year Ended December 31, 2023 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 75.8 $ 0.83 $ 82.8 $ 0.90 Special items, after tax (Attachment 3) 79.3 0.86 116.2 1.26 Amortization expense, after-tax 61.5 0.67 49.0 0.53 Adjusted net income / EPS $ 216.6 $ 2.36 $ 248.0 $ 2.69 (1) Per share amounts may not recalculate from figures presented herein due to rounding 1 Three Months Ended December 31, Year Ended December 31, Reconciliation to EBITDA and Pro Forma Adjusted EBITDA 2023 2022 2023 2022 Sales - GAAP $ 719.0 $ 790.4 $ 3,142.8 $ 3,396.9 Pro forma APM adjustments — — — 256.1 Pro forma adjusted sales $ 719.0 $ 790.4 $ 3,142.8 $ 3,653.0 Net income (loss) from continuing operations – GAAP $ 27.6 $ (16.6) $ 76.3 $ 83.1 Income tax (benefit) expense (7.0) (60.8) 11.0 (19.3) Interest expense 26.8 49.4 115.3 119.8 Depreciation and amortization from continuing operations 44.2 48.6 188.8 162.5 EBITDA from continuing operations $ 91.6 $ 20.6 $ 391.4 $ 346.1 Special items, before tax 22.4 104.3 114.6 194.0 Interest expense included in special items (0.1) (16.0) (2.3) (26.0) Depreciation and amortization included in special items — (1.5) (1.9) (5.5) Adjusted EBITDA $ 113.9 $ 107.4 $ 501.8 $ 508.6 APM pro forma adjustments - 8 months 2022* — — — 83.1 Pro forma adjusted EBITDA $ 113.9 $ 107.4 $ 501.8 $ 591.7 Pro forma adjusted EBITDA as a percent of sales 15.8 % 13.6 % 16.0 % 16.2 % * Pro forma adjustment for January - August 2022 APM results (period before Avient ownership).

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. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. Avient 2011 and 2018 valuations reflect trailing 12 months EBITDA at December 31 of the respective years. 38 EV / 2023E EBITDA Historic Multiple 6.5 8.3 9.6 13.2 13.0 12.8 11.3 8.6 17.9 16.8 10.7 8.8 8.8 8.7 7.5 6.9 A vi e n t (2 0 1 1 ) A vi e n t (2 0 1 8 ) A vi e n t (2 0 2 3 ) K W R P P G R P M A V Y F U L E C L H X L F M C S C L C E A S H E M N H U N Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except for per share data) Senior management uses comparisons of adjusted net income from continuing operations attributable to Avient shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to Avient shareholders, excluding special items, to assess performance and facilitate comparability of results.

POLYMER FAMILY MATERIAL PRODUCT NAME DOSAGE Polyolefin PEA0820031 CESA Nox PEA0820031 0.5–1% Polypropylene PPA0820055 CESA Nox PPA0820055 0.5–1% Polyamide ABA0820029 CESA Nox ABA0820029 0.5–1% Polyester NBA0820022 CESA Nox NBA0820022 0.5–1% Polycarbonate NCA0820015 CESA Nox NCA0820015 0.5–2.5% Styrenic SLA0820009 CESA Nox SLA0820009 0.5–2.5% TPU RUA0820029 CESA Nox RUA0820029 0.3–1.5%

CESA™ Release Additives Lubrication PRODUCT SELECTION GUIDE CESA RELEASE – STANDARD OFFERINGS POLYMER FAMILY MATERIAL PRODUCT NAME DOSAGE Polyolefin PEA0820046 CESA Release PEA0820046 0.5–2.5% Polypropylene PPA0820053 CESA Release PPA0820053 0.5–2% Polyamide ABA0820031 CESA Release ABA0820031 1–3% Polyester NGA0820008 CESA Release NGA0820008 1–2% Polycarbonate NCA0820014 CESA Release NCA0820014 1–2% Styrenic SLA0820008 CESA Release SLA0820008 1–5% TPU RUA0820025 CESA Release 20025 0.5–2% CESA Release additives can be used in combination with other CESA masterbatches, and formulations can be customized for most applications.

In this case, a top tier-1 automotive molder was routinely running cycle times longer than originally quoted, as inconsistencies in CFA performance were creating processing issues and generating more scrap. THE SOLUTION The Avient technical team leveraged expertise in liquid formulations with the science of dispersion to develop Excelite™ IM, a CFA solution that targeted automotive injection molding applications and would help address the issues of this tier-1 molder. This tier-1 molder could now achieve a uniform, statistical distribution of active CFA content with an added degree of control that is unrivaled in the industry today.

AVNT-2021.06.30-News Release 1 NEWS RELEASE FOR IMMEDIATE RELEASE Avient Announces Registration Details for December 9th Investor Day CLEVELAND – November 3, 2021 – Avient Corporation (NYSE: AVNT), a leading provider of specialized and sustainable material solutions, will host an Investor Day for investment professionals on Thursday, December 9, 2021, from 8:00 a.m. to 1:00 p.m., at the New York Marriott Marquis hotel. Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G. Rose Vice President, Corporate Communications Avient Corporation +1 440-930-3162 kyle.rose@avient.com https://www.avient.com/ https://www.avient.com/news mailto:giuseppe.disalvo@avient.com mailto:kyle.rose@avient.com NEWS RELEASE

No. 0962.01) 09/05/2023 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 AVIENT CORPORATION 80 North West Street Norwalk, OH 44857 Craig Polta Phone: 419 660 4278 MECHANICAL Valid To: September 30, 2025 Certificate Number: 0962.01 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following tests on plastics: Test Method(s) Test Name ASTM D256; ISO 180 Notched Izod ISO 179 (1eA) Determination of Charpy Impact ASTM D523 Gloss ASTM D618 (Method A) Conditioning of Test Specimens ASTM D792 (Method A) Specific Gravity ASTM D1238 (Method B) Melt Flow Rate ASTM D3012 Thermal Oxidative Stability ASTM D3641 Injection Molding Test Specimens FMVSS 302 Flammability ASTM E1331; SAE J1545 Spectrophotometric Color Difference SAE J1885 (Rev. MAR2005)1, J2412, J2527; BO 116-01 Xenon Arc Weathering (Exposure Testing) SAE J361 Visual Inspection of Automotive Trim GM9302P, GMW17141 Stress Mark Susceptibility GMW14688 Scratch and Mar Resistance (Erichsen) BN108-13, BO162-01 Resistance to Scratching GMW3205 Resistance to Odor Propagation of Interior Materials 1 This laboratory’s scope contains a superseded method.

TIER 1 SUPPLIER V E H I C L E H V A C S Y S T E M • Rapidly develop formulations for 7 types of thermoplastic • Help Tier 1 meet VW requirements for anti-static solutions • Able to quickly develop 7 SmartBatch (color + effect additive) solutions, for 7 types of thermoplastic • Avient formulated the TPE used in the air vents for this HVAC system SmartBatch™ Combination Colorants and Additives, Cesa™ Stat Additives, and OnFlex™ TPE KEY REQUIREMENTS WHY AVIENT? AVIENT SOLUTION IMPROVE VIAQ Copyright © 2022, Avient Corporation LEARN MORE https://www.avient.com/products/thermoplastic-elastomers/onflex-thermoplastic-elastomers Tier 1 supplier

View PDF The SQS herewith attests that the organisation named below has a management system that meets the requirements of the normative base mentioned. 7 0 0 1 _1 /A p ri l 2 0 2 2 /V er si o n 2 .0 Certificate Avient Colorants Germany GmbH Kornkamp 50 22926 Ahrensburg Germany Scope Production of Color- and Additives Concentrates, Compounds and Foaming Agents Normative base ISO 50001:2018 Energy Management System Reg. no. 46090 Page 1 of 1 Validity 20. 01. 2024  – 19. 01. 2027 Issue 20. 01. 2024  A.Grisard, President SQS F.

Avient की वैश्विक रिश्वतखोरी-रोधी एवं भ्रष्टाचार-रोधी नीति जार ी कि या: 1 ज लुाई, 2020 वि षय-सचू ी हमारी वैश्विक रिश्वतखोरी-रोधी एवं भ्रष्टाचार-रोधी नीति 1 अनुपालन का महत्त्व 1 हमारी ज़िम्मेदारी 1 रिश्वत क्या है? जबकि वय्कत्ि गत द ेश क े काननू अलग-अलग होत े ह ै,ं य े 1 आपके प्रस्तावित व्यय को अनुमति है या नहीं यह पता करने के लिए Avient की आचार संहिता और हमारी उपहार व मनोरंजन नीति के उपहार एवं सत्कार अनुभाग को देखें। Avient की बहियों और अभिलेखों में भ्रामक, अपूर्ण या मिथ्या प्रविष्टियां करना • तृतीय पक्षों के साथ कार्य-व्यवहार करते समय खतरे के संकेतों को नज़र-अंदाज़ करना विषय-सूची उत्तरी अमेरिका वैश्विक मुख्यालय एवन लेक, संयुक्त राज्य अमेरिका 33587 वॉकर रोड एवन लेक, OH, संयुक्त राज्य अमेरिका 44012 टोल फ्री: +1 866 765 9663 फोन: +1 440 930 1000 फैक्सः +1 440 930 3064 एशिया प्रशांत प्रक्षेत्रीय मुख्यालय शंघाई, चीन 2F, ब्लॉक C 200 जिन्सू रोड पुडोंग, 201206 शंघाई, चीन दूरभाष: +86 (0) 21 6028 4888 फैक्सः +86 (0) 21 6028 4999 दक्षिण अमेरिका प्रक्षेत्रीय मुख्यालय साओ पॉलो, ब्राज़ील Av.