Unified social credit code: 91320412MA1NMF5W4P is in conformity with Environmental Management System Standard: GB/T24001-2016 / ISO14001:2015 The certificate is valid to the following product(s)/service: Textile (Yarn), Glass Products (Yarn) Coating Processing and Related Management Activities Registration Address/ Physical Address: R&D Workshop 5, No. 8, Lanxiang Road, West Taihu Science and Technology Industrial Park, Changzhou City, Jiangsu Province, P.

Unified social credit code: 91320412MA1NMF5W4P is in conformity with Environmental Management System Standard: GB/T 24001-2016 / ISO 14001:2015 The certificate is valid to the following product(s)/service: Coating Processing of Textile (Yarn) and Glass Products (Yarn) and Related Management Activities Registration Address/ Physical Address: R&D Workshop 5, No. 8, Lanxiang Road, West Taihu Science and Technology Industrial Park, Changzhou City, Jiangsu Province, P.

Unified social credit code: 91320412MA1NMF5W4P is in conformity with Quality Management System Standard: GB/T 19001-2016 / ISO 9001:2015 The certificate is valid to the following product(s)/service: Coating Processing of Textile (Yarn) and Glass Products (Yarn) Registration Address/ Physical Address: R&D Workshop 5, No. 8, Lanxiang Road, West Taihu Science and Technology Industrial Park, Changzhou City, Jiangsu Province, P.

KEY FEATURES • Swellcoat can be applied to any yarn in fiber optic cable • Precision wound for optimal cable production speed • Single & dual ends available • Low dust • Replaces messy gels • High stability package allows for higher output FIBER-LINE™ FIBERS SUITABLE FOR WATER BLOCKING YARN • Para-Aramid • PET Polyester (standard, low, ultra low shrink) fiber • Liquid Crystal Polymer (LCP) • Fiberglass • Dyneema® Ultra-High Molecular Weight Polyethylene (UHMWPE) FIBER-LINE PERFORMANCE-ADDITIVE COATINGS • Swellcoat Coatings: water absorbing protection • Swellcoat Blocker: blocks water migration • Non-wick/Anti-wick Coatings: water resistant shield FIBER-LINE WATER BLOCKING APPLICATIONS • Binder yarn • Buffer tube thread • Filler yarn • Ripcords • Strength members Copyright © 2023, Avient Corporation. Headquarters, R&D, Manufacturing Fiber-Line LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 Manufacturing Operations Fiber-Line LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 European Headquarters, Operations, Sales Office Fiber-Line International B.V. Fahrenheitlaan 8 9207 HE Drachten The Netherlands +31(0) 58 216 7599 European Manufacturing Operations Fiber-Line International Unit 1B, Churnet Park, James Brindley Road Leek, Staffordshire, ST13 8YH Asia Pacific Operations & Sales Office Fiber-Line International Building 9, No. 8 Lanxiang road, Shimoxi Garden, Wujin Area Changzhou, Jiangsu, China, 213145 +86(0)519-8885 7566 MATERIALS MADE IN AMERICA BY AMERICAN COMPANIES Avient manufactures engineered fiber solutions for fiber optic cable manufacturing through its subsidiary Fiber-Line, LLC.

PolyOne Corporation Chairman, President and Chief Executive Officer, PolyOne Corporation

PolyOne Corporation chairman, president and chief executive officer, PolyOne Corporation

PolyOne Corporation Chairman, President and Chief Executive Officer, PolyOne Corporation

Avient corporation first quarter 2023 results AVIENT CORPORATION I N V E S T O R P R E S E N T A T I O N (NYSE: AVNT) J A N UA RY 2 0 2 4 DISCLAIMER Forward-Looking Statements Certain statements contained in or incorporated by reference into this presentation constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. For the same reasons, Avient is unable to address the probable significance of the unavailable information. Avient 2011, 2018 and 2021 multiples reflect trailing 12 months EBITDA at December 31. 28 EV / 2023E EBITDA 6.5 8.5 11.0 10.8 16.1 15.5 14.1 14.0 10.3 21.0 19.0 14.3 12.1 11.8 11.7 11.5 9.7 11 21 23 PM AV FM Avient Historic Multiple Avient Specialty Other Specialty / AP P E N DI X 30 Performance Additives 16% Pigments 12% TiO2 Dyestuffs 2% Polyethylene Nylon Polypropylene Styrenic Block Copolymer Other Raw Materials 33% ~40% hydrocarbon based (Grey shaded materials are hydrocarbon based, includes portion of “Other Raw Materials”) Non-hydrocarbon based materials 2022 pro forma results for the acquisition of Avient Protective Materials RAW MATERIAL BASKET SEGMENT DATA U.S. & Canada 40% 37% 18% 2022 PRO FORMA SEGMENT, END MARKET AND GEOGRAPHY GEOGRAPHY REVENUESEGMENT FINANCIALS Building and END MARKET REVENUE $2,355M $402M $1,300M $272M Sales EBITDA Specialty Engineered Materials Color Additives and Inks $592M$3,653M (1) 9% 32 (1) Total company sales and adjusted EBITDA of $3,653M and $592M, respectively, include intercompany sales eliminations and corporate costs 2022 REVENUE | $2 .4 BILLION US & Canada 34% 38% END MARKET REGION 33 34% 21% Building & 1% Energy 2% COLOR, ADDITIVES & INKS 2022 PRO FORMA REVENUE | $1 .3 BILLION US & Canada 52% 35% 34 19% 8%Industrial 16% 9% Defense Building & END MARKET REGION SPECIALTY ENGINEERED MATERIALS 32% 27% 14% Building & 3% 1% Defense 1% (18% of sales) 9% 2022 PROFORMA AVIENT REGIONAL SALES 27% 14% 17% Building & (37% of sales)Transportation 12% Building & US & Canada (40% of sales) 7% 56% 23% 7% Building & 1% LATAM (5% of sales) 3% 35 BY END MARKET 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.

These TPE grades, formulated for consumer applications, can be used in personal care products, lawn and garden tools, outdoor goods, office supplies, footwear, and houseware durables. Michelle Maniscalco Senior Manager, Marketing Communications Avient Corporation +1 440-930-1988 michelle.maniscalco@avient.com Company Officers

CLEVELAND – October 5, 2023 – Dyneema®, owned by Avient Corporation, a leading provider of specialty and sustainable material solutions, today announced the launch of a next-generation unidirectional (UD) material innovation based on its third-generation fiber: a groundbreaking development poised to enhance the safety and mobility of law enforcement officers and military forces. Media contact Crandall Turner Avient Corporation crandall.turner@avient.com Company Officers