Abernathy 69 2018 Yes M M Richard H. Director since: 2018 Age: 69 • Haemonetics Corporation Former Directorships: • Halyard Health, Inc. • RadioShack Corp. • Lubrizol Corp. • Kimberly-Clark de Mexico Richard H. Garratt Cash Severance Benefit (2)(8) — — — — — 1,135,506 1,600,500 Annual Incentive for Year of Termination — 165,506 165,506 165,506 — — — Cash-Settled Performance Units (3) — 513,359 513,359 513,359 — — 717,400 Restricted Stock Units (4) — 407,427 407,427 407,427 — — 661,462 Health and Welfare Benefits (6) — — — — — 107,119 107,119 Financial Planning Services (7) — — — — — — 10,000 Lump Sum for Defined Contribution Plans — — — — — — 66,479 PROXY STATEMENT 2024 | Annual Meeting of Shareholders 69 Name Benefits and Payments Voluntary Retirement(1)   ($) Disability  Death With Cause Cause Cause or for Good  Reason Following a Change of Control Cash Severance Benefit (2)(8) — — — — — 1,256,719 1,837,500 Annual Incentive for Year of Termination — — 206,719 206,719 — — — Cash-Settled Performance Units (3) — — 529,358 529,358 — — 765,400 Restricted Stock Units (4) — — 423,390 423,390 — — 716,958 SARs (4) — — — — — — — Health and Welfare Benefits (6) — — — — — 46,037 46,037 Financial Planning Services (7) — — — — — — 10,000 Outplacement Benefits — — — — — 12,000 — Lump Sum for Defined Contribution Plans — — — — — — 75,440 L.K.

Ahrensburg, Germany 69. The following table summarizes our liquidity as of December 31, 2023: Cash and cash equivalents $ 545.8 Revolving credit availability 199.7 Liquidity $ 745.5 As of December 31, 2023, approximately 69% of the Company’s cash and cash equivalents resided outside the United States. Wulfsohn 69 AVIENT CORPORATION [This page intentionally left blank] [This page intentionally left blank] [This page intentionally left blank] STOCK EXCHANGE LISTING Avient's Common Stock is listed on the New York Stock Exchange, Symbol: AVNT SHAREHOLDER INQUIRIES If you have any questions concerning your account as a shareholder, name or address changes, inquiries regarding stock certificates, or if you need tax information regarding your account, please contact our transfer agent: Equiniti Trust Company 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2615 or 1-651-450-4064 www.shareowneronline.com Additional information about Avient, including current and historic copies of Annual Reports on Form 10-K and other reports filed with the Securities and Exchange Commission, is available online at www.avient.com or free of charge from: Investor Relations 33587 Walker Road Avon Lake, Ohio 44012 Phone: 1-440-930-1000 ANNUAL MEETING The annual meeting of Avient will be held virtually via live webcast at 9:00 a.m.

End of Fill Part Length Dynamic Pressure Hydrostatic Pressure P ss Gate End Part FIGURE 61 - Deflection Equations H F WLMax Deflection: 0.002" (0.05mm) 1 = W • H3 12 _______ bending = F • L3 48 • E • I _______ k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = FIGURE 60 - Pressure vs Part Length FIGURE 61 - Deflection equations FIGURE 62 - For Plate Shaped Parts FIGURE 63 - For Cylindrical Shaped Parts Design Guide 49 • MMoldings = Combined mass of molded parts • Cp = Specific Heat of the material Step 3 – Heat Removal Rate • Nlines = The total number of independent cooling lines there are in the mold • tc = The cooling time required by the part (Determined in step 1) Step 4 – Coolant Volumetric Flow Rate • ΔTMax,Coolant = Change in coolant Temperature During Molding (1°C) • ρCoolant = Density of coolant • CP = Specific heat of coolant Step 5 – Determine Cooling Line Diameter • ρCoolant = Density of coolant • VCoolant = Volumetric flow rate of coolant • μCoolant = Viscosity of coolant • ΔPline = Max pressure drop per line (Usually equals half of the pump capacity) • LLine = Length of the cooling lines COOLING LINE SPACING k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = k Vcoolant nmax, coolant • Pcoolant • Cp, coolant Dmin = 2D < H < 5D H < W < 2H FIGURE 70 - Cooling Line Spacing FIGURE 64 - Heat Transfer Equation FIGURE 65 - Total Cooling for Mold FIGURE 66 - Cooling Required by Each Line FIGURE 68 - Max Diameter Equation FIGURE 69 - Min Diameter Equation FIGURE 67 - Volumetric Flow Rate Equation 50 Gravi-Tech ADHESIVE ADVANTAGES DISADVANTAGES Cyanoacrylate Rapid, one-part process Various viscosities Can be paired with primers for polyolefins Poor strength Low stress crack resistance Low chemical resistance Epoxy High strength Compatible with various substrates Tough Requires mixing Long cure time Limited pot life Exothermic Hot Melt Solvent-free High adhesion Different chemistries for different substrates High temp dispensing Poor high temp performance Poor metal adhesion Light Curing Acrylic Quick curing One component Good environmental resistance Oxygen sensitive Light source required Limited curing configurations Polyurethane High cohesive strength Impact and abrasion resistance Poor high heat performance Requires mixing Silicone Room temp curing Good adhesion Flexible Performs well in high temps Low cohesive strength Limited curing depth Solvent sensitive No-Mix Acrylic Good peel strength Fast cure Adhesion to variety of substrates Strong odor Exothermic Limited cure depth Design Guide 51 Bibliography 1.

The payout was earned by PolyOne exceeding adjusted earnings per share thresholds over four, equally-weighted performance periods as noted below. 2015 – 2017 Cash-Settled Performance Units Performance Measure: Adjusted Earnings Per Share Performance Periods Weighting Target Result Payout % January 1, 2015 – December 31, 2015 25% $2.07 $1.96 69% January 1, 2016 – December 31, 2016 25% $2.42 $2.13 64% January 1, 2017 – December 31, 2017 25% $2.43 $2.18 81% January 1, 2015 – December 31, 2017 25% $6.92 $6.27 74% Total Attainment 72% All financial measures (threshold, target and maximum levels, and results) with respect to the incentives described above were calculated with adjustments for acquisitions, divestitures and special items pursuant to the terms of the 2017 Annual Incentive Program and 2015 - 2017 long-term incentive program (the “2015-2017 Long-Term Incentive Program”) and as approved by the Compensation Committee. The Named Executive Officers received a cash payout based on achieving 72% of the target level performance for this goal, reflected below. 2015 – 2017 Cash-Settled Performance Units Performance Measure: Adjusted Earnings Per Share* Performance Periods Weighting Threshold Target Maximum Result Payout % January 1, 2015 – December 31, 2015 25% $1.89 $2.07 $2.25 $1.96 69% January 1, 2016 – December 31, 2016 25% $2.02 $2.42 $2.85 $2.13 64% January 1, 2017 – December 31, 2017 25% $1.78 $2.43 $3.21 $2.18 81% January 1, 2015 – December 31, 2017 25% $5.69 $6.92 $8.31 $6.27 74% Total Attainment 72% * All financial measures (performance measures and results) reported in the table above were calculated with adjustments for acquisitions, divestitures and special items (as noted on Appendix A) pursuant to the terms of the plans and as approved by the Compensation Committee.

$12M+ For United Way Since 2006 2.0 1.0 .5 09+22+36+55+83+90+94 2006 2008 2010 2012 2014 2016 2018 $ il li s U .S . d ll ar Sustainability Report | 2018 69 Global Vision 2020 PolyOne collaborates with Global Vision 2020, a non-profit organization that provides a system for diagnosing and creating eyeglasses onsite for people in low resource countries with no access to eye care.

Cergy, France 69. Headquartered in Avon Lake, Ohio, with 2021 sales of $4.8 billion, we have manufacturing sites and distribution facilities around the globe, with 69% and 46% of our respective Color, Additives and Inks and Specialty Engineered Materials segments' sales outside the United States. PRINCIPAL ACCOUNTANT FEES AND SERVICES Information regarding fees paid to and services provided by Avient’s independent registered public accounting firm and the pre-approval policies and procedures of the audit committee is incorporated by reference to the information contained in the 2022 Proxy Statement. 69 AVIENT CORPORATION PART IV ITEM 15.

Other Avient CDP Climate Change Questionnaire 2021 Tuesday, August 3, 2021 69 C7.9b (C7.9b) Are your emissions performance calculations in C7.9 and C7.9a based on a location-based Scope 2 emissions figure or a market-based Scope 2 emissions figure?

Tossiat, France 69. LLC, as joint-lead arrangers and joint-book managers, Jefferies Finance LLC, KeyBanc Capital Markets Inc. and SunTrust Robinson Humphrey, Inc., as co-managers, and several other commercial lending institutions that are parties thereto (incorporated by reference to Exhibit 10.6 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015, SEC File No. 1-16091) 10.4 Amendment Agreement No. 1 to the Credit Agreement, dated as of June 15, 2016, among the Company, certain subsidiaries of the Company, Citibank, N.A., as administrative agent, and the additional lender party thereto (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30. 2016, SEC File No. 16091) 69 AVIENT CORPORATION 10.5 Amendment Agreement No. 2, dated August 3, 2016, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Citibank, N.A, as administrative agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on August 5, 2016, SEC File No. 10.6 Amendment Agreement No. 3, dated January 24, 2017, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Citibank, N.A., as administrative agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2017, SEC File No. 1-16091) 10.7 Amendment Agreement No. 4, dated August 15, 2017, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Citibank, N.A., as administrative agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2017, SEC File No. 1-16091) 10.8 Amendment Agreement No. 5, dated April 11, 2018, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Citibank, N.A., as administrative agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2018, SEC File No. 1-16091) 10.9 Amendment Agreement No. 6, dated November 9, 2018, by and among PolyOne Corporation, the subsidiaries of PolyOne Corporation party thereto, Citibank, N.A, as administrative agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on November 13, 2018, SEC File No. 10.10+ Amendment Agreement No. 7, dated as of August 29, 2022, by and among Avient Corporation, the lenders party thereto and Citibank, N.A., as administrative agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K filed on September 1, 2022, SEC File No. 1-16091) 10.11+ Amended and Restated Avient Corporation 2010 Equity and Performance Incentive Plan (incorporated by reference to Appendix B to the Company’s definitive proxy statement on Schedule 14A filed on April 3, 2015, SEC File No. 10.12+ First Amendment to the Avient Supplemental Retirement Benefit Plan (As Amended and Restated Effective January 1, 2014), dated as of March 16, 2016; Amendment No. 2 to the Avient Supplemental Retirement Benefit Plan (As Amended and Restated Effective January 1, 2014), dated as of December 19, 2018; and Amendment No. 3 to the Avient Supplemental Retirement Benefit Plan (As Amended and Restated Effective January 1, 2014), dated as of April 18, 2019 (incorporated by reference to Exhibit 4.5 to the Company's Registration Statement on Form S-8, filed on May 6, 2019, SEC File No. 333-231236) 10.13+ Avient 2017 Equity and Incentive Compensation Plan (incorporated by reference to Appendix B to the Company's definitive proxy statement on Schedule 14A filed on March 31, 2017, SEC File No. 1-16091) 10.14+ Avient Corporation Deferred Compensation Plan for Non-Employee Directors (As Amended and Restated Effective July 15, 2021) (incorporated by reference to Exhibit 10.1 of the Company’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2021, SEC File No. 1-16091) 10.15+ Form of Management Continuity Agreement for Executive Officers prior to 2011 (incorporated by reference to Exhibit 10.13 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2007, SEC File 10.16+ Form of Management Continuity Agreement for Executive Officers after 2011 (incorporated by reference to Exhibit 10.12 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013, SEC File No. 10.17+** Schedule of Executive Officers with Management Continuity Agreements 10.18+ Avient Supplemental Retirement Benefit Plan (As Amended and Restated Effective January 1, 2014) (incorporated by reference to Exhibit 10.14 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013, SEC file No. 1-16091) 10.19 Assumption of Liabilities and Indemnification Agreement, dated March 1, 1993, amended and restated by Amended and Restated Assumption of Liabilities and Indemnification Agreement, dated April 27, 1993 (incorporated by reference to Exhibit 10.14 to The Geon Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 1996, SEC File No. 1-11804) 10.20+ Executive Severance Plan, as amended and restated effective May 15, 2014 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014, SEC File 10.21+ Form of 2013 Award Agreement under the Avient Corporation 2010 Equity and Performance Incentive Plan, as amended (incorporated by reference to Exhibit 10.27 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013, SEC File No. 1-16091) 10.22+ Form of Director and Officer Indemnification Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on July 5, 2006, SEC File No. 1-16091) 10.23+ Form of 2014 Award Agreement under the Avient Corporation 2010 Equity and Performance Incentive Plan, as amended (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014, SEC File No. 1-16091) 10.24+ Avient Corporation 2020 Equity and Incentive Compensation Plan (incorporated by reference to Appendix B to the Company’s definitive proxy statement on Schedule 14A filed on March 30, 2020, SEC File No. 1-16091). 10.25+ Form of 2021 Award Agreement under the Avient Corporation 2020 Equity and Incentive Compensation Plan (incorporated by reference to Exhibit 10.25 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, SEC File No. 1-16091) 70 AVIENT CORPORATION Exhibit No.

For additional information about our financing arrangements, see Note 5, Financing Arrangements, to the accompanying consolidated financial As of December 31, 2011, approximately 69% of the Company’s cash and cash equivalents reside outside the United States. Wulfsohn 69 EXHIBIT INDEX 2.1† Purchase Agreement, dated as of February 28, 2011, by and among PolyOne Corporation, 1997 Chloralkali Venture, LLC, Olin Corporation and Olin SunBelt II, Inc.

Biodiversity (4.1.2.1) Positions of individuals or committees with accountability for this environmental issue Select all that apply ☑ Board chair ☑ Board-level committee (4.1.2.2) Positions’ accountability for this environmental issue is outlined in policies applicable to the board Select from: 69 ☑ Yes (4.1.2.3) Policies which outline the positions’ accountability for this environmental issue Select all that apply ☑ Other policy applicable to the board, please specify :Governance and Corporate Responsibility & EHS Committee (4.1.2.4) Frequency with which this environmental issue is a scheduled agenda item Select from: ☑ Scheduled agenda item in every board meeting (standing agenda item) (4.1.2.5) Governance mechanisms into which this environmental issue is integrated Select all that apply ☑ Reviewing and guiding annual budgets ☑ Overseeing and guiding scenario analysis ☑ Overseeing the setting of corporate targets ☑ Monitoring progress towards corporate targets ☑ Reviewing and guiding innovation/R&D priorities ☑ Approving and/or overseeing employee incentives ☑ Overseeing and guiding major capital expenditures ☑ Overseeing and guiding the development of a business strategy ☑ Overseeing and guiding acquisitions, mergers, and divestitures ☑ Reviewing and guiding the assessment process for dependencies, impacts, risks, and opportunities (4.1.2.7) Please explain Climate Change related issues are the responsibility of Avient’s Chairman of the Board. Row 26 (9.3.1.1) Facility reference number Select from: ☑ Facility 69 (9.3.1.3) Value chain stage Select from: ☑ Direct operations (9.3.1.4) Dependencies, impacts, risks, and/or opportunities identified at this facility Select all that apply ☑ Risks (9.3.1.5) Withdrawals or discharges in the reporting year Select from: ☑ Yes, withdrawals and discharges 479 (9.3.1.7) Country/Area & River basin Germany ☑ Rhine (9.3.1.8) Latitude 0 (9.3.1.9) Longitude 0 (9.3.1.10) Located in area with water stress Select from: ☑ No (9.3.1.13) Total water withdrawals at this facility (megaliters) 0 (9.3.1.14) Comparison of total withdrawals with previous reporting year Select from: ☑ About the same (9.3.1.15) Withdrawals from fresh surface water, including rainwater, water from wetlands, rivers and lakes 0 (9.3.1.16) Withdrawals from brackish surface water/seawater 0 480 (9.3.1.17) Withdrawals from groundwater - renewable 0 (9.3.1.18) Withdrawals from groundwater - non-renewable 0 (9.3.1.19) Withdrawals from produced/entrained water 0 (9.3.1.20) Withdrawals from third party sources 0 (9.3.1.21) Total water discharges at this facility (megaliters) 0 (9.3.1.22) Comparison of total discharges with previous reporting year Select from: ☑ About the same (9.3.1.23) Discharges to fresh surface water 0 (9.3.1.24) Discharges to brackish surface water/seawater 0 (9.3.1.25) Discharges to groundwater 0 481 (9.3.1.26) Discharges to third party destinations 0 (9.3.1.27) Total water consumption at this facility (megaliters) 0 (9.3.1.28) Comparison of total consumption with previous reporting year Select from: ☑ About the same (9.3.1.29) Please explain Avient does not externally disclose water information at the site level. Row 69 (9.3.1.1) Facility reference number Select from: 611 ☑ Facility 3 (9.3.1.3) Value chain stage Select from: ☑ Direct operations (9.3.1.4) Dependencies, impacts, risks, and/or opportunities identified at this facility Select all that apply ☑ Risks (9.3.1.5) Withdrawals or discharges in the reporting year Select from: ☑ Yes, withdrawals and discharges (9.3.1.7) Country/Area & River basin Canada ☑ Mississippi River (9.3.1.8) Latitude 0 (9.3.1.9) Longitude 0 (9.3.1.10) Located in area with water stress Select from: ☑ Yes 612 (9.3.1.13) Total water withdrawals at this facility (megaliters) 0 (9.3.1.14) Comparison of total withdrawals with previous reporting year Select from: ☑ About the same (9.3.1.15) Withdrawals from fresh surface water, including rainwater, water from wetlands, rivers and lakes 0 (9.3.1.16) Withdrawals from brackish surface water/seawater 0 (9.3.1.17) Withdrawals from groundwater - renewable 0 (9.3.1.18) Withdrawals from groundwater - non-renewable 0 (9.3.1.19) Withdrawals from produced/entrained water 0 (9.3.1.20) Withdrawals from third party sources 0 (9.3.1.21) Total water discharges at this facility (megaliters) 0 613 (9.3.1.22) Comparison of total discharges with previous reporting year Select from: ☑ About the same (9.3.1.23) Discharges to fresh surface water 0 (9.3.1.24) Discharges to brackish surface water/seawater 0 (9.3.1.25) Discharges to groundwater 0 (9.3.1.26) Discharges to third party destinations 0 (9.3.1.27) Total water consumption at this facility (megaliters) 0 (9.3.1.28) Comparison of total consumption with previous reporting year Select from: ☑ About the same (9.3.1.29) Please explain Avient does not externally disclose water information at the site level.