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March 2025 - Final and Approved version.pdf Avient Corporation Corporate Governance Guidelines The Board of Directors (the “Board”) of Avient Corporation (the “Company”) has adopted the following Corporate Governance Guidelines (the “Guidelines”). March 14, 2025

Avient 2023 Proxy Statement Pages 47-49, 51

TECHNICAL BULLETIN UV RESISTANCE • UV testing: QUV-A Test, 0.68 @ 45C • Comparable results to traditional TPEs reSound OM 5510-45N reSound OM 5510-60N Bio-derived Content (%) 40% 50% Hardness, Shore A 45 60 Delta E after 150 hrs. 0.22 0.23 Delta E after 300 hrs. 1.68 0.56 AGING – BONDING STRENGTH ONTO ABS reSound OM 5520-55N Room Temperature 70C Bio-derived Content (%) 49% 49% 49% 49% 49% 49% 49% Hardness, Shore A 54 54 55 54 55 56 OM Substrate ABS ABS ABS ABS ABS ABS ABS OM Avg. Peel (N/mm) 3.2 2.9 3.2 3.2 3.1 3.2 3.1 Failure Mode Cohesive Cohesive Cohesive Cohesive Cohesive Cohesive Cohesive KEY PROPERTIES AND OVERMOLD PERFORMANCE reSound™ OM 5510 grades for overmolding onto PP and reSound OM 5520 for ABS reSound OM 5510-30N reSound OM 5510-45N reSound OM 5510-60N reSound OM 5510-70N reSound OM 5520-55N Bio-derived Content (%) 40% 40% 50% 50% 49% Hardness, Shore A 30 45 60 70 54 Specific Gravity 0.88 0.88 0.89 0.89 0.95 50% Modulus, PSI 96 153 247 384 258 100% Modulus, PSI 137 251 343 462 353 Tensile Strength, PSI 264 438 625 608 637 Elongation, % 280 215 306 271 319 Tear Strength, PLI 58 84 109 132 146 OM Substrate PP PP PP PP ABS OM Avg. Peel, PLI 12 19 23 20 19 reSound OM 5510 for PP reSound OM 5510-60N Room Temperature 70C Bio-derived Content (%) 50% 50% 50% 50% 50% 50% 50% Hardness, Shore A 60 60 60 60 60 60 60 Specific Gravity 0.89 0.89 0.89 0.89 0.89 0.89 0.90 50% Modulus, PSI 247 241 244 251 234 244 240 100% Modulus, PSI 343 333 338 339 321 331 326 Tensile Strength, PSI 625 621 647 610 633 662 642 Elongation, % 306 314 309 313 312 315 315 Tear Strength, PLI 109 108 113 113 111 117 115 reSound OM 5520-55N Room Temperature 70C Bio-derived Content (%) 49% 49% 49% 49% 49% 49% 49% Hardness, Shore A 54 54 55 55 54 55 56 Specific Gravity 0.95 0.95 0.96 0.96 0.95 0.96 0.96 50% Modulus, PSI 258 256 256 265 266 271 257 100% Modulus, PSI 353 355 357 362 373 379 367 Tensile strength, PSI 637 615 637 669 651 674 642 Elongation, % 319 315 319 333 313 319 315 Tear Strength, PLI 146 136 133 142 137 138 141 reSound OM 5510-45N Room Temperature 70C Bio-derived Content (%) 40% 40% 40% 40% 40% 40% 40% Hardness, Shore A 45 46 47 46 46 45 45 Specific Gravity 0.88 0.89 0.89 0.89 0.89 0.89 0.90 50% Modulus, PSI 153 158 154 162 137 136 133 100% Modulus, PSI 251 259 259 261 226 222 218 Tensile Strength, PSI 438 481 451 495 417 470 486 Elongation, % 215 240 211 243 204 227 238 Tear Strength, PLI 84 81 87 82 83 85 84 AGING – PROPERTY RETENTION • Tested at room temperature and 70° C for comparison • Hardness, tensile strength elongation and modulus showed great retention Overmolding onto PP Overmolding onto ABS RHEOLOGY Suitable for injection molding and overmolding 1.0 10 100 1000 10000 100000 10.0 100.0 1000.0 reSound OM 5510-30N reSound OM 5510-45N reSound OM 5510-60N reSound OM 5510-70N Shear Rate, 1/s Ca pi lla ry V is co si ty , P a* s 1.0 10 100 1000 10000 100000 10.0 100.0 1000.0 reSound OM 5520-55N Shear Rate, 1/s Ca pi lla ry V is co si ty , P a* s Capillary viscosity at 200°C Capillary viscosity at 200°C reSound OM 5510 for PP reSound OM 5520 for ABS www.avient.com Copyright © 2020, Avient Corporation.

Copyright © . 2025 3 Avient at a glance EBITDA - Full year 2025 $540 to 570M ▲6% to ▲12% growth excluding FX ADJ. EPS - Full year 2025 $2.70 to $2.94 Q1 2025 $0.76 adj.

All Rights Reserved 2025 Q1 2025 highlights Q1 2025 results Q1 2025 VS. All Rights Reserved 2025 18 Color, Additives & Inks – Q1 2025 performance Sales 515 520 Q1 2024 Q1 2025 EXCL. All Rights Reserved 2025 19 Specialty Engineered Materials – Q1 2025 performance Sales 314 308 Q1 2024 Q1 2025 Flat EXCL.

in aggregate principal amount of senior notes due 2025 (the "notes") in an offering exempt from the registration requirements of the Securities Act of 1933 (the "Securities Act"). View original content:http://www.prnewswire.com/news-releases/polyone-announces-pricing-of-650-million-5-75-senior-notes-due-2025--301049717.html

For more than 50 years, closurelogic GmbH has been manufacturing aluminum closures in Germany. The company is headquartered in Worms, Germany, with subsidiaries in Spain and Turkey supplying more than 50 countries worldwide. Over half of closurelogic’s revenues are generated from sales outside of Germany.

In 2025, we will continue this collaboration by having our supplier’s complete compliance and ESG assessments to ensure adherence to standard modern slavery and human trafficking laws. In order to improve our internal processes and bring ColorMatrix in line to the global Avient system a more effective working process for identifying risk and measuring progress through KPI’s is targeted to be implemented through 2025, which will allow us to improve the mitigation and monitoring of risk across our suppliers. On behalf of the Board of Directors for ColorMatrix Europe Limited: Amanda Saal (Director) Signature: Date: 26th June 2025