Once risks are identified, the likelihood of occurrence and potential impact of each risk is evaluated and assessed considering mitigating activity. Despite past attacks, no cybersecurity incident has had a material impact on our business.

When a metal propeller blade strikes a submersed obstacle with severe impact forces, it can permanently bend or break. With a Piranha composite propeller, the blades flex and absorb energy from minor impacts. Avient’s Complēt MT composite materials enable up to 20% more impact resistance than standard long fiber reinforced materials.

OUR PRODUCT CARBON FOOTPRINT CALCULATOR In today’s world, understanding and mitigating the environmental impact of products is more important than ever. Understand Environmental Impact: Gain insights into the environmental impact of end-use products, helping to enhance sustainability efforts Develop Sustainable Products: Leverage Avient’s solutions to create new products that offer reduced environmental impact.

Senior management has referenced adjusted EPS excluding the impact of additional shares issued in February 2020. This guidance excluded the impact of the additional shares subsequently issued in February. 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)

No. 0514.01) 12/11/2023 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 AVIENT CORPORATION – ANALYTICAL SOLUTIONS 33587 Walker Road Avon Lake, OH 44012 Stephanie Mims Phone: 440 930 3499 MECHANICAL Valid To: September 30, 2025 Certificate Number: 0514.01 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following rubber and plastics tests: Test Description Test Method or Standard Brittleness Temperature (Impact) ASTM D746; ISO 812 Charpy Impact ISO 179-1 Color Determination by Spectrophotometer ASTM D2244, E1331; ISO 7724 Conditioning of Plastics for Testing ASTM D618; ISO 291 Deflection Temperature Under Flexural Load ASTM D648; ISO 75-1, -2 Durometer Hardness (Shore A and D) ASTM D2240; ISO 7619-1 Flexural Properties ASTM D790; ISO 178 Flow Rate (Extrusion Plastometer) ASTM D1238 (Procedures A and B); ISO 1133 Impact Resistance (Izod) ASTM D256; ISO 180 Instrumented Impact ASTM D3763; ISO 6603-2 Specific Gravity/Density ASTM D792 (Method A); ISO 1183-1 Specular Gloss ASTM D523; ISO 2813 Tackiness of Interior Materials BO 061-01 Tear Resistance ASTM D624, D1004; ISO 34 Tensile Properties ASTM D412 (Method A), D638, D882; ISO 37, 527-1, -2, -3, -4, -5 Xenon-Arc Exposure Testing ASTM D2565, G155; SAE J1885 (Withdrawn January 2008), J1960 (Withdrawn January 2008), J2412, J2527; BO-116-01 For the tests to which this accreditation applies, please refer to the laboratory’s Mechanical Scope of Accreditation.

Unless otherwise stated, Adjusted Operating Income, Adjusted EBITDA and Adjusted EPS figures included in this presentation exclude the impact of special items as defined in our quarterly earnings releases. EPS (ex Amort & Financing) 3.96$ 0.82$ 4.78$ (0.88)$ 3.90$ Impact of Financing - April Announcement - (0.47) (0.47) 0.30 (0.17) Incremental Interest Expense Since Announcement - (0.22) (0.22) (0.22) Adj. However, these impacts have moderated as of late.

Among the required properties were high strength and stiffness, impact resistance, moderate temperature resistance and low warpage. This material offers the stiffness and high impact performance required to support and secure multiple electronic attachments, and provides the impact and temperature resistance needed. Excellent performance = customer satisfaction: The strength, impact resistance, low warpage and additional properties of Bergamid resin help ensure the part meets stringent OEM requirements and satisfies its customers

Injection Moldable Polymer CFRTP Blank Auxiliary Heater Overmolded Finished Part Increase strength and impact resistance. As illustrated here, molding with continuous fiber reinforced composites enables improved flexural performance over filled polypropylene as well as increased impact resistance and overall weight reduction. With a single layer of Polystrand CFRTP: • Flexural strength increases more than 60% • Total energy absorbed on impact improves by nearly 35% • Peak force at puncture increases over 58% Increase strength and impact resistance.

This degradation can impact the processability, quality, and food safety of packaging made from rPET. Avient has developed a "Heat Stability Protocol" to screen new additive solutions for their impact on color and NIAS through two full recycle loops at 100% recycled content.

This degradation can impact the processability, quality, and food safety of packaging made from rPET. Avient has developed a "Heat Stability Protocol" to screen new additive solutions for their impact on color and NIAS through two full recycle loops at 100% recycled content.