Product ID FIBER-LINE® Coating Base Fiber Tensile Strength Load at 1% Elongation Absorption Capacity 2.3 mm FRP Swellcoat® Fiberglass ≥ 5115 N ≥ 2100 2.5 – 4.5 g/m .60 mm ARP N/A Kevlar® ≥ 340 N ≥ 165 N N/A 5.00 mm FRP N/A Fiberglass ≥ 24041 ≥ 9617 N/A .40 mm ARP N/A Kevlar® ≥ 210 N ≥ 95 N N/A .50 mm FRP Swellcoat® Fiberglass ≥ 300 N ≥ 130 ≤ 1.0 g/m POPULAR FRP ROD PRODUCTS LOCATIONS Headquarters, R&D, Manufacturing FIBER-LINE® LLC 3050 Campus Drive Hatfield, PA 19440 +1 215.997.9181 fiber@fiber-line.com Manufacturing Operations FIBER-LINE® LLC 280 Performance Drive SE Hickory, NC 28602 +1 828.326.8700 fiber@fiber-line.com EMEA & Asia Pacific Operations FIBER-LINE® INTERNATIONAL B.V.

Available as a granular masterbatch for injection molding, thermoforming or extrusion, these new additives offer superior performance for most clear polymers, including polyethylene (PE), polypropylene (PP), polycarbonate (PC), polyethylene terephthalate (PET) and polystyrene (PS).

OnCap™ Nucleating Foaming Agent Additive: essential ingredient for manufacturing coaxial PE cables via gas injection foaming

PE overmolding can be achieved with our Dynalloy™ OBC 8000 T grades.

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

The company noted that third quarter 2024 GAAP EPS includes $0.07 of special items (see Attachment 3) and $0.16 of intangible amortization expense (see Attachment 1). 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. 5 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 6 Attachment 1 Avient Corporation Summary of Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Sales $ 815.2 $ 753.7 $ 2,493.9 $ 2,423.8 Operating income 77.2 34.3 243.7 153.7 Net income from continuing operations attributable to Avient shareholders 38.2 5.1 121.2 48.0 Diluted earnings per share from continuing operations attributable to Avient shareholders $ 0.41 $ 0.06 $ 1.32 $ 0.52 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.

Name of topic CABLE PRODUCER P H O T O V O L T A I C C A B L E • Simplified supply chain and inventory by providing one solution for both insulation and jacket coating • Provided a material that gave cable a good surface finish and improved cable life time value (passed Arrhenius life time prediction as per IEC 60216-1 in internal lab test) • Reduced catalyst dosage resulting in lower material cost • Improved customer processing speeds • Enabled flame retardant performance to EN 50618 and IEC 60332-1 standards on complete cable ECCOH™ XL 8148 + ECCOH XL CAT 005 Formulations KEY REQUIREMENTS WHY AVIENT?

Page 1 / 1 has been assessed and certified as meeting the requirements of ISO 14001:2015 For the following activities The Design and Manufacturing of Plastic Color Concentrated, Plastic Additive Concentrated and Pigment Powder for Thermoplastic & Rubber Industries.

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

Birmingham, Alabama 1. Interest on the 2030 Notes is payable semi-annually in arrears on February 1 and August 1 of each year, commencing on February 1, 2023. Beggs, certify that: 1.