Knowsley, Merseyside, L34 9GT Unity Grove, Knowsley Business Park Liverpool, United Kingdom Phone: +44 151 632 8800 IQAP Masterbatch Group Headquarters & Factory Carretera de Vic a Olot (C153) km.5 08510 Masies de Roda Phone: +34 938 500 066 PolyOne Luxembourg S.à r.l 19 Route de Bastogne L9638 Pommerloch, Luxembourg Phone: +35 226 905 035 Asia/Pacific Magenta Master Fibers Co., Ltd. Rachatewa, Bangplee Samutprakarn, Thailand, 10540 Phone: +66 232 791 00 Americas The ColorMatrix Corporation 680 North Rocky River Drive Berea, 44017 OH, USA Phone: +1 216 622 0100 Innovation Center & Manufacturing Plant 2900 Shawnee Industrial Way Suwanee, GA, United States, 30024 Phone: +1 770 271 5900 ColorMatrix do Brasil Indústria e Comércio de Pigmentos e Aditivos Ltda. 13295-000 Itupeva, SP Brazil Av.

The company noted that second quarter 2024 GAAP EPS includes $0.24 of special items (see Attachment 3) and $0.16 of intangible amortization expense (see Attachment 1). We also generated 4% and 1% organic sales growth in EMEA and Asia, respectively. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 6 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.

Standard ISO 900 1:2O15 Scope of supply c o II +t (u U t-r- '.F t- (u () (n rU '- c) l cu q) t_ l m Design, development, marketing & sales and related application support of UHMWPE, Ultra-High-Motecutar-Weight PolyEthytene fibers and UniDirecfionat sheets. Originat Cycte Start Date: Expiry Date of Previous Cycle: Certification/Recertification Audit Date: Certification/Recertification Cycte Start Date: Subject to the continued satisfactory operation of the organization's Management System, this certificate expires on: Certificate No: N1027324 I Version: 1 02 December 2003 14 Septembe r 2O24 16 February 2024 06 March 2024 18 March 2027 Revision date: 06 March 2024 Ow^ An\qgKerbusch - Director Certification Benelux Managing Office: Bureau Veritas lnspection and Certification The Netherlands B.V. - Ptotterweg 38, 3821 BB nmersfoort lssuing Office: Bureau Veritas lnspection and Certification The Nethertands B.V. - Plotterweg 38, 3821 BB Amersfoort Further clarifications regarding the scope of this certificate and the appticabitity of the management system requirements may be obtained by consutting the organization. Standard ISO 900 1:2015 Scope of suppty Version: 1 Revision date: 06 March 2024 Kerbusch - Director Certification Benelux Managing office: Bureau veritas lnspecLion and certification The Nethertan

December 4, 2023 December 1, 2023 November 14, 2023

RUSSETT 4 GOLD SHIMMER 4 DP-9208-1-1000

FERC)1. 1http://www.ferc.gov/media/news-releases/2014/2014-4/11-20-14-E-4.asp#.Vuwyv3bmqUk Rose, Vice President, Corporate Communications, PolyOne Corporation, +1 440-930-3162, kyle.rose@avient.com

Southern States saw an opportunity to provide a unique solution to its utility customers, who were under pressure to comply with new physical security mandates from the Federal Energy Regulatory Commission (FERC)1. 1 http://www.ferc.gov/media/news-releases/2014/2014-4/11-20-14-E-4.asp#.Vuwyv3bmqUk EDITORS: For a high-resolution image, please click here: Southern States To access PolyOne’s news library online, please go to www.polyone.com/news.  Media contact Michelle Maniscalco Marketing Communications Manager, North America PolyOne Corporation +1 440-930-1988 michelle.maniscalco@avient.com 

Microsoft PowerPoint - PolyOne Investor Presentation 5.4.20_v8 • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • P E O P LE P RO D U CT S P LA N E T P E RF O R MAN C E •• •• •• JVs Performance Products & Solutions Distribution Specialty     To be the world’s premier provider of specialized polymer materials, services and solutions To be the world’s premier provider of specialized polymer materials, services and sustainable solutions • • • • • • • • • • • • • • 2016 2017 2018 2019 Lightweighting Reduced Material Requirements Improved Recyclability Renewable Energy Applications Eco-conscious Bio-derived Content Reduced Energy Use VOC Reduction $275M $325M $355M $410M 14% Total Annual Growth 9% Organic Annual Growth PolyOne Corporation 33 Senior management uses comparisons of adjusted net income from continuing operations attributable to PolyOne shareholders and diluted adjusted earnings per share (EPS) from continuing operations attributable to PolyOne shareholders, excluding special items, to assess performance and facilitate comparability of results. Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016** 2017** 2018 2018*** Q1 2019*** 2019 Q1 2020 Net income from continuing operations attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 166.4 $ 173.5 $ 161.1 $ 87.7 $ 22.4 $ 75.5 $ 33.1 Joint venture equity earnings, after tax (19.0) (14.7) (3.7) — — — — — — — — — — — Special items, before tax(1) (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 23.8 32.9 59.5 58.7 12.2 61.7 9.6 Special items, tax adjustments(1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) (25.3) (25.1) (1.2) (5.9) (1.0) Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 174.3 $ 181.6 $ 195.3 $ 121.3 $ 33.4 $ 131.3 $ 41.7 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 80.4 80.4 78.2 77.7 86.7 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 $ 2.43 $ 1.51 $ 0.43 $ 1.69 $ 0.48 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation. ** Pro forma for sale of Designed Structures and Solutions segment (DSS). *** Pro forma for sale of Performance Products and Solutions segment (PP&S). Reconciliation to Adjusted EPS Excluding Special Items and Impacts of February 2020 Equity Offering Three Months Ended March 31, 2020 Net income from continuing operations – GAAP $ 33.1 Special items, after tax(1) 8.6 After tax interest income earned on equity proceeds, included in Interest expense, net (0.7) Adjusted net income excluding special items and impact of interest income on equity proceeds $ 41.0 Diluted weighted-average shares used to compute earnings per common share 86.7 Weighted-average impact of 15.3 million shares issued in February 2020 equity offering (9.3) Diluted weighted-average shares excluding impact of shares issued in February 2020 equity offering 77.4 Adjusted EPS - excluding special items and the net impact of equity offering $ 0.53 Reconciliation of Non-GAAP Financial Measures (Unaudited) (Dollars in millions, except per share data)

KLA: 245806 - v5 - p. 1/8 TERMS AND CONDITIONS TERMOS E CONDIÇÕES 1. KLA: 245806 - v5 - p. 7/8 14. A provision elsewhere in this contract that conflicts with a provision in these general terms and conditions will govern. 14.

subject= http://avient.ethicspoint.com http://www.Avient.com/company/policies-and-governance/ethics-hotline http://www.Avient.com/company/policies-and-governance/ethics-hotline 1. ห้ามส่ือสารกับคูแ่ข่งในเรือ่งใด ๆ เกี่ยวกับการประมูล ห้ามมิ ให้ รบัข้อมูล ( โดยเฉพาะข้อมูลเกี่ยวกับราคา) โดยตรงจากคูแ่ข่ง 4. หลีกเล่ี ยงกลยุทธ ์ที่สามารถตคีวามไดว้า่ถูกออกแบบมาเพื่อแยก เปอรเ์ซ็นตท์ัง้หมดหรอืที่สำ�คญัของคูแ่ข่งของ Avient ในสาย ธุรกิจใด ๆ จากตลาดการคา้ หรอือาจถูกตคีวามไดว้า่เป็นความ พยายามในการทำ�ลายการตอ่ตา้นการแข่งขันคูแ่ข่งที่เฉพาะ เจาะจง หรอืควบคมุราคา ปรกึษาฝ่ายกฎหมายของ Avient หาก มีคำ�ถามใด ๆ 14.