Cable jacket/sheath– Made of PE or PVC 9 Fiber-Line Product PolyOne Materials F I B E R O P T I C A L G R O W T H D R I V E R S PolyOne Corporation 20 5G Networks  Enable lower latency, greater flexibility & efficiency  Installation of these networks are in the very early stages  Installation will start in urban hubs and will continue to expand into suburban and rural areas  By 2025, only 14% of the world will have 5G connections  Growth is expected over multi- year period 5G technology will be a leading growth driver in fiber optic cable for several years 10x Speed Increase & 8x More Antennae Required 5G vs. 4G PolyOne Corporation 21 Safety Technology Geography Service FinancialPeople Low EH&S risk profile New and complementary technologies Leverage our global footprint Strong customer relationships Foundational operating margins of 8-10% with ability to double Motivated team with a specialty culture I N V E S T - T O - G R O W M & A S T R A T E G Y PolyOne Corporation 22 Capture sourcing synergies Cross-sell & blend technology 8-10% operating margins I N V E S T - T O - G R O W M & A P L A Y B O O K Protect customers Retain employees Implement LSS to drive efficiency improvements Innovate with combined portfolio Safety First!

Cable jacket/sheath– Made of PE 9 Fiber-Line Product PolyOne Materials F I B E R O P T I C A L G R O W T H D R I V E R S PolyOne Corporation 20 5G Networks  Enable lower latency, greater flexibility & efficiency  Installation of these networks are in the very early stages  Installation will start in urban hubs and will continue to expand into suburban and rural areas  By 2025, only 14% of the world will have 5G connections  Growth is expected over multi- year period 5G technology will be a leading growth driver in fiber optic cable for several years 10x Speed Increase & 8x More Antennae Required 5G vs. 4G PolyOne Corporation 21 Safety Technology Geography Service FinancialPeople Low EH&S risk profile New and complementary technologies Leverage our global footprint Strong customer relationships Foundational operating margins of 8-10% with ability to double Motivated team with a specialty culture I N V E S T - T O - G R O W M & A S T R A T E G Y PolyOne Corporation 22 Capture sourcing synergies Cross-sell & blend technology 8-10% operating margins I N V E S T - T O - G R O W M & A P L A Y B O O K Protect customers Retain employees Implement LSS to drive efficiency improvements Innovate with combined portfolio Safety First!

Morgan • New Senior Secured Term Loan B and new Senior Unsecured Notes • Potential proceeds from sale of Distribution business modeled to pay off 5.25% senior notes due 2023 and Term Loan • Acquisition aligned with Avient’s track record of disciplined capital allocation policy • Existing dividend policy maintained, focus on deleveraging in the near term (1) (1) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution, including repayment of senior notes due 2023 and Term Loan Cash and Cash Equivalents 595$ Senior Secured Term Loan due 2026 605$ New Senior Secured Term Loan B 500 Total Senior Secured Debt 1,105$ Senior Unsecured Notes due 2025 650$ New Senior Unsecured Notes 740 Total Senior Unsecured Debt 1,390$ Total Debt 2,495$ Net Debt 1,900$ 2022 Pro forma Adjusted EBITDA 660$ Net Debt / Adjusted EBITDA 2.9x Pro Forma Capitalization (2022 estimates, all figures in $M) T WO - Y E A R L E V E R AG E G OA L 24 3.5x 2.7x 1.7x 2.9x 2.5x 2.2x 2019PF 2020PF 2022E 2022PF 2023E 2024E Dyneema® AcquisitionClariant Color Acquisition (1) Pro forma for the acquisition of the Clariant Color business (2) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution, including repayment of senior notes due 2023 and Term Loan (1) (1) (2) 25 P RO F O R M A M O D E L I N G 2022E Pro Forma Pro Forma ($M) w/ Dyneema w/Sale Revenue 5,100$ 415$ 5,515$ (1,775)$ 3,740$ Adjusted EBITDA 635 130 765 (105) 660 EBITDA % 12% 31% 14% 6% 18% Pro Forma EPS (Adjusted) 3.50$ 0.00$ 3.50$ (0.56)$ 2.94$ Pro Forma EPS (excl. amortization) 3.96$ 0.35$ 4.31$ (0.56)$ 3.75$ Leverage (12/31/2022E) Net Debt / Adjusted EBITDA 1.7x 3.5x 2.9x Avient Dyneema Distribution® ® OUR SPECIALTY JOURNEY AC Q U I S I T I O N H I S TO RY 27 Commercial Resources(1) Operating Income ($ in millions) Operating Margins 259 360 At Acquisition 2021 $40 $122 At Acquisition 2021 9% 21% At Acquisition 2021 Established Acquisitions (> 7 years) + 39% + 210% + 1200 bps (1) Commercial Resources include associate headcount in R&D / Technical, Marketing and Sales C L A R I A N T C O LO R AC Q U I S I T I O N 28 $133 $205 2019PF 2021 28 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.1x 2019PF 2021 2021 w/ Full Synergies • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • $54 million of synergies realized in 2021 • Acquisition completed on July 1, 2020 for $1.45 billion.

All Rights Reserved 2024 61 History of balanced capital deployment $0 .1 6 $0 .2 0 $0 .2 6 $0 .3 4 $ 0. 42 $0 .5 0 $ 0. 58 $0 .7 2 $0 .7 9 $0 .8 2 $0 .8 8 $0 .9 6 $1 .0 0 $1 .0 3 $1 .0 8 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 Dividend $ per shareAdj.

Cable jacket/sheath– Made of PE or PVC 9 Fiber-Line Product PolyOne Materials F I B E R O P T I C A L G R O W T H D R I V E R S PolyOne Corporation 22 5G Networks  Enable lower latency, greater flexibility & efficiency  Installation of these networks are in the very early stages  Installation will start in urban hubs and will continue to expand into suburban and rural areas  By 2025, only 14% of the world will have 5G connections  Growth is expected over multi- year period 5G technology will be a leading growth driver in fiber optic cable for several years 10x Speed Increase & 8x More Antennae Required 5G vs. 4G PolyOne Corporation 23 Safety Technology Geography Service FinancialPeople Low EH&S risk profile New and complementary technologies Leverage our global footprint Strong customer relationships Foundational operating margins of 8-10% with ability to double Motivated team with a specialty culture I N V E S T - T O - G R O W M & A S T R A T E G Y PolyOne Corporation 24 Capture sourcing synergies Cross-sell & blend technology 8-10% operating margins I N V E S T - T O - G R O W M & A P L A Y B O O K Protect customers Retain employees Implement LSS to drive efficiency improvements Innovate with combined portfolio Safety First!

The global antimicrobial plastics market is forecasted to grow signifi- cantly from 36.9 billion to 59.8 billion USD during 2020– 2025, a compound annual growth rate of 10.1%.[3] Similar to the specialty biocides market, the outbreak of COVID- 19 has undoubtedly increased consumer cognizance of high-touch plastic surfaces (e.g., phone cases, point-of- purchase equipment, shopping carts, etc.).

Globalization Positions us to ser ve our customers consistently, ever ywhere in the world. The Avient Ethics Hotline ser ves as a mechanism for associates to anonymously report any concerns regarding such decisions. For example, an EU directive for use of recycled PET (rPET) in beverage bottles will increase from 25 percent in 2025 to 30 percent in 2030.

Feb 10, 2025

Option Exercise Price ($) (e) Option Expiration Date (f) Market Value of Shares or Units of Stock That Have Not Vested ($) (h) Equity Incentive Plan Awards: Market or Payout Value of Unearned Shares, Units or Other Rights that Have Not Vested ($) (j) - - 14,650 (1) 465,284 - - - 25,724 (2) 816,994 - - - 8,384 (3) 266,276 - - - 24,306 (4) 771,959 - - - - 25,724 (9) 816,994 - - - 50,991 (10) 1,619,474 - - - 50,991 (10) 1,619,474 30,500 (12) 14.81 2/16/2021 - - 48,800 (13) 14.61 2/14/2022 - - 20,467 (14) 10,233 (14) 23.08 2/15/2023 - - 6,834 (15) 6,833 (15) 6,833 (15) 35.07 2/11/2024 - - 66,700 (16) 38.27 2/4/2025 - - - - 20,490 (5) 650,762 - - - 7,157 (3) 227,306 - - - 6,788 (4) 215,587 - 5,800 (15) 5,800 (15) 5,800 (15) 35.07 2/11/2024 - - 18,700 (16) 38.27 2/4/2025 - - - - 64,981 (1) 2,063,797 - - - 102,877 (6) 3,267,374 - - - 37,201 (3) 1,181,504 - 91,334 (14) 45,666 (14) 23.08 2/15/2023 - - 30,334 (15) 30,333 (15) 30,333 (15) 35.07 2/11/2024 - - - - 6,504 (1) 206,567 - - - 4,294 (3) 136,377 - - - 25,551 (7) 811,500 - - - 4,052 (4) 128,692 - - - - 25,551 (11) 811,500 9,134 (14) 4,566 (14) 23.08 2/15/2023 - - 3,467 (15) 3,467 (15) 3,466 (15) 35.07 2/11/2024 - - - 11,200 (16) 38.27 2/4/2025 - - - - 6,504 (1) 206,567 - - - 3,579 (3) 113,669 - - - 3,446 (4) 109,445 - 23,300 (13) 14.61 2/14/2022 - - 9,134 (14) 4,566 (14) 23.08 2/15/2023 - - 2,900 (15) 2,900 (15) 2,900 (15) 35.07 2/11/2024 - - 9,300 (16) 38.27 2/4/2025 - - - - 2,769 (8) 87,943 - - - 2,567 (8) 81,528 - - - 1,316 (8) 41,796 - - - 261 (8) 8,289 -- - -- -J.A.

Skills/Experience Ab er na th y Fe ar on G of f G re en Je lli so n Li n M in k N ic ol as Pa tt er so n P re et e Ve rd ui n W ul fs oh n Financial          International             Industry Expertise          Regulatory        Technology     Human Capital           Operations            Corporate Governance          IT and Cybersecurity      Sustainability             Background Gender Male Male Male Male Male Female Female Male Male Male Female Male Race/Ethnicity White White White Black White White White Black White White White White Other Public Company Boards 1 3 1 — — 2 2 — 1 2 — 1 PROXY SUMMARY PROXY STATEMENT 2022 | Annual Meeting of Shareholders 13 GOVERNANCE HIGHLIGHTS As part of our commitment to overall excellence, our Companyʼs governance practices include the following: Director Independence • Strong commitment to Director independence: Eleven out of our twelve Director nominees are independent Garratt 2/11/2019 — — — — 6,227 348,401 — — 2/10/2020 — — — — 6,596 369,046 — — 2/08/2021 — — — — 5,142 287,695 — — 2/04/2015 9,200 — 38.27 2/4/2025 — — — — 2/15/2017 13,250 — 34.10 2/15/2027 — — — — 2/14/2018 11,050 — 41.89 2/14/2028 — — — — 2/11/2019 12,133 6,067 31.54 2/11/2029 — — — — 2/10/2020 6,550 13,100 31.48 2/10/2030 — — — — 2/08/2021 — 20,150 42.27 2/8/2031 — — — — L.K. Rathbun 2/11/2019 — — — — 5,904 330,329 — — 2/10/2020 — — — — 6,441 360,374 — — 2/08/2021 — — — — 5,142 287,695 — — 2/11/2014 2,400 — 35.07 2/11/2024 — — — — 2/04/2015 2,500 — 38.27 2/4/2025 — — — — 2/10/2016 10,400 — 24.98 2/10/2026 — — — — 2/15/2017 10,100 — 34.10 2/15/2027 — — — — 2/14/2018 10,400 — 41.89 2/14/2028 — — — — 2/11/2019 11,433 5,717 31.54 2/11/2029 — — — — 2/10/2020 6,400 12,800 31.48 2/10/2030 — — — — 2/08/2021 — 20,150 42.27 2/8/2031 — — — — (1) Amounts in these columns represent stock-settled SARs that vest in one-third increments, with each one-third increment vesting on the later of (a) the first, second and third anniversary of the grant date, respectively and (b) the achievement of a stock price hurdle (based on Avientʼs closing stock price and sustained for thirty consecutive trading days) applicable to that increment.