Liên hệ ngay với Phòng Pháp chế của Avient và ghi lại sự việc. 10 Bắc Mỹ Trụ sở chính Avon Lake, Hoa Kỳ 33587 Walker Road Avon Lake, OH, Hoa Kỳ 44012 Số điện thoại miễn phí: +1 866 765 9663 Điện thoại: +1 440 930 1000 Fax: +1 440 930 3064 Châu Á Thái Bình Dương Trụ sở Khu vực Thượng Hải, Trung Quốc 2F, Block C 200 Đường Jinsu Phố Đông, 201206 Thượng Hải, Trung Quốc Điện thoại: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 Nam Mỹ Trụ sở Khu vực Sao Paulo, Brazil Av.

OUR CODE OF INTEGRITY IN OUR CORPORATE SOCIAL CODE OF CONDUCT | 30 http://avient.ethicspoint.com http://avient.ethicspoint.com North America Global Headquarters Avon Lake, United States 33587 Walker Road Avon Lake, OH, United States 44012 Toll Free: +1 866 765 9663 Phone: +1 440 930 1000 Fax: +440 930 3064 Asia Pacific Regional Headquarters Shanghai, China 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, China Telephone: +86 (0) 21 6028 4888 Fax: +86 (0) 21 6028 4999 South America Sao Paulo, Brazil Av.

Commission file number 1-16091 PolyOne Corporation (Exact name of registrant as specified in its charter) Ohio   34-1730488 (State or other jurisdiction of incorporation or organization)   (IRS Employer Identification No.) 33587 Walker Road,   44012 Avon Lake, Ohio   (Zip Code) (Address of principal executive offices)   Registrant’s telephone number, including area code            (440) 930-1000 Securities registered pursuant to Section 12(b) of the Act: Title of each class   Name of each exchange on which registered Common Shares, par value $.01 per share   New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.     For more information about our international operations, see Note 14, Segment Information, to the accompanying consolidated financial Where You Can Find Additional Information Our principal executive offices are located at 33587 Walker Road, Avon Lake, Ohio 44012, and our telephone number is (440) 930-1000. 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: 1-855-598-2815 or 1-651-450-4064 www.shareowneronline.com Additional information about PolyOne, 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.polyone.com or free of charge from: Investor Affairs Administrator 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 17, 2018 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.

Commission file number 1-16091 PolyOne Corporation (Exact name of registrant as specified in its charter) Ohio 34-1730488 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.) 33587 Walker Road, 44012 Avon Lake, Ohio (Zip Code) (Address of principal executive offices) Registrant’s telephone number, including area code (440) 930-1000 Securities registered pursuant to Section 12(b) of the Act: Title of each class Name of each exchange on which registered Common Shares, par value $.01 per share New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. For more information about our international operations, see Note 14, Segment Information, to the accompanying consolidated financial 7POLYONE CORPORATION 8 Where You Can Find Additional Information Our principal executive offices are located at 33587 Walker Road, Avon Lake, Ohio 44012, and our telephone number is (440) 930-1000. 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: Wells Fargo Shareowner Services 1110 Centre Pointe Curve, Suite 101 Mendota Heights, MN 55120-4100 Phone: 1-855-598-2815 or 1-651-450-4064 www.shareowneronline.com Additional information about PolyOne, 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.polyone.com or free of charge from: Investor Affairs Administrator 33587 Walker Road Avon Lake, Ohio 44012 Phone: 440-930-1000 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 11, 2017 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio.

i NOTICE OF 2023 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 11, 2023 9:00 a.m. Please carefully review the proxy materials for the Annual Meeting, which will be held virtually via live webcast on Thursday, May 11, 2023 at 9:00 a.m. The Annual Meeting webcast will begin promptly at 9:00 a.m.

NOTICE OF 2017 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 11, 2017 9:00 a.m. Our telephone number is (440) 930-1000. For inforff mation on the terms and conditions of these incentive programs, see the “What We Pay and Why: Elements of Compensation” section of this proxy statement. 4 POLYONE CORPORATRR ION PolyOne Center 33587Walker Road Avon Lake, Ohio 44012 DatedMarch 31, 2017 Our Board respectfully requests your proxy for use at the Annual Meeting to be held at PolyOne’s corporate headquarters located at PolyOne Center, 33587 Walker Road, Avon Lake, Ohio 44012 at 9:00 a.m. on Thursday, May 11, 2017, and at any adjournments of that meeting.

Animal Testing Policy Audit Committee Charter California Transparency in Supply Chains Act Disclosure Code of Conduct Code of Ethics—Applicable to Avient Senior Officers ColorMatrix Europe Limited—Modern Slavery and Human Trafficking Statement Compensation Committee Charter Conflict Minerals Policy Corporate Governance Guidelines Environmental Policy Equal Employment Opportunity Global ISO Certificate Library Global Policy on Anti-Bribery and Anti-Corruption Global Policy on Antitrust Governance and Corporate Responsibility Committee Charter Position on Human Rights Privacy Policy Product Stewardship Policy Quality Policy Responsible Care Policy Safety and Health Policy Security Policy Supplier Code of Conduct HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 82 https://www.avient.com/sites/default/files/2022-03/Sustainability%20ESG%20Disclosures_Animal%20Testing%20Policy.pdf https://www.avient.com/sites/default/files/2020-07/avient-audit-committee-charter-rev-10-2019.pdf https://www.avient.com/california-transparency-act-disclosure https://www.avient.com/sites/default/files/2022-03/2022%20Senior%20Financial%20Officer%20Code%20of%20Conduct%20Policy%5B75%5D.pdf https://www.avient.com/sites/default/files/2022-05/Compensation%20Committee%20Charter%20(REV%2010-2019).pdf https://www.avient.com/sites/default/files/2020-10/avient-conflict-minerals-policy-10.2020.pdf https://www.avient.com/sites/default/files/2021-03/corporate-governance-guidelines-2021.pdf https://www.avient.com/sites/default/files/2021-04/eeo-updated-2020.pdf https://www.avient.com/company/policies-and-governance/global-policy-anti-bribery-and-anti-corruption https://www.avient.com/company/policies-and-governance/global-policy-antitrust https://www.avient.com/sites/default/files/2020-07/avient-governance-and-corporate-responsibility-committee-charter-rev-2020.pdf https://www.avient.com/sites/default/files/2021-07/avient-human-rights-position-statement-updated-july-2021.pdf https://www.avient.com/company/policies-and-governance/polyone-corporation-privacy-statement https://www.avient.com/sites/default/files/2022-05/Avient_ProdStewardship_Policy_2022%20Update.pdf https://www.avient.com/sites/default/files/2022-05/Avient%20Quality%20Policy.pdf https://www.avient.com/sites/default/files/2021-05/avient-responsible-care-ehs-s-policies-2021.pdf https://www.avient.com/sites/default/files/2020-10/avient-security-policy-august-2020.pdf METRICS Aldringen, Belgium by Lavinia Bocan HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | IndexHOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 83Sustainability Report | 2022 83 People Data and Metrics Category 2019 2020 2021 2022 Total TRIR (#—Direct) 0.56 0.50 0.55 0.51 Total TRIR (#—Contractors) 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 36 37 55 57 Recordable Illnesses (Total #) 0 0 0 0 Total LTIR (#—Direct) 0.29 0.24 0.14 0.15 Total LTIR (#—Contractors) 0.00 0.00 0.00 0.00 Total Injuries of High Consequence (% of TRIR) 14 5 2 0 Total Fatality Rate (#—Direct) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Contractors) 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 Transport Incidents (#—US DOT 5800/EU ADR) 0 0 0 0 Safety Improvements Completed (#) N/A N/A 10,100 14,658 EH&S Internal Audits (#) 58 37 25 40 Workers covered by an EH&S Management Systems (%) 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 Facilities externally certified ISO45001 (or equivalent — %)* N/A 52 56 54 Suppliers externally certified ISO45001 (% of surveyed) N/A 44 56 53 *Certificates can be found at (https://www.avient.com/company/policies-and-governance/global-iso-certificate-library) HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 84 Planet Data and Metrics ENERGY1 Total Energy (GJ) 2,377,860 2,242,291 2,361,107 2,265,482 Energy Intensity (GJ/MT Sales) 5.09 5.04 4.77 5.05 Renewable Electricity (MWh)** 104,880.63 122,505.22 174,701.68 232,488.43 Electric Power (MWh) 461,426.13 439,773.23 460,693.35 439,215.11 Renewable Electricity (%) 23 28 38 53 Renewable Energy (%) 16 20 27 37 Total Self-Generated Energy (GJ) 11,845 14,590 11,461 12,019 Energy Saving Activities (#) 59 74 102 129 Annual Savings from Energy Saving Activities (GJ) 35,573 19,470 72,845 439,347 Capital Invested in Energy Savings ($MM USD) 1.97 2.43 1.74 5.05 PURCHASED ENERGY (%) Purchased Electricity (%) 49.74 51.70 51.05 69.79 Purchased Natural Gas (%) 12.89 14.11 13.46 29.45 Purchased Steam (%) 0.00 0.00 0.00 0.00 Purchased Diesel Fuel (%) 0.87 0.95 1.12 0.76 SOURCES OF PURCHASED ELECTRICITY (%)2 Non-Renewable: Coal 46.72 45.53 41.12 40.04 Non-Renewable: Natural Gas 33.69 36.12 17.51 17.41 Non-Renewable: Other Fossil Fuels 0.00 0.00 0.26 0.21 Non-Renewable: Nuclear 11.95 11.37 9.86 9.01 Non-Renewable: Oil 2.16 1.60 1.82 1.70 Renewable: Hydro 3.24 2.23 14.79 15.22 Renewable: Wind 0.70 0.88 7.94 9.02 Renewable: Solar 1.48 2.20 3.76 4.67 Renewable: Biomass 0.06 0.07 2.53 2.44 Renewable: Geothermal 0.00 0.00 0.29 0.28 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 85 EMISSIONS1 Greenhouse Gas Emissions (MT Scope 1 GHG)** 36,680 39,023 36,147 34,792 Greenhouse Gas Emissions (MT Scope 2 GHG)** 169,789 102,479 100,595 99,465 Greenhouse Gas Emissions (MT Scope 3 GHG)3 584,622 1,440,584 2,122,338 6,421,128 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG)** 206,469 141,502 136,742 134,257 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Sales) 0.44 0.32 0.28 0.30 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ B Revenue) 51,864 63,886 41,249 39,524 Annual GHG Emissions Avoidance from ESA & WMP (MT) 8,378 10,235 33,631 115,099 Reportable Releases—above permitted limits (#) 0 0 0 0 EMISSIONS OF SOX/NOX/VOC/HAPS (MT) SOx 0.14 0.13 0.13 0.25 NOx 14.74 10.85 11.77 12.96 VOC 695.40 659.43 648.17 563.96 Top 4 Hazardous Air Pollutants 0.98 1.00 1.18 6.96 Particulate Matter 33.78 30.99 32.88 28.02 WASTE Total Waste (MT) 31,087 29,783 33,090 32,267 Total Waste Intensity (Kg Waste/MT Sales) 66.60 66.92 66.90 71.88 Total Waste Intensity (MT Waste/ B Revenue) 7,809 13,447 9,982 9,499 Percent of Total Waste Recycled/Beneficially Reused (%) 51.45 50.51 47.85 48.60 Percent of Total Waste Landfilled (%) 40.13 40.20 43.26 44.24 Total Waste Landfilled (MT)** 12,476 11,972 14,315 14,274 Total Non-Hazardous Waste (MT) 27,608 26,606 29,298 28,503 Waste Minimization Projects (#) 34 53 142 114 Annual Diversion from Waste Minimization Projects (MT) 2,087 743 3,136 8,425 Capital Invested in Waste Minimization ($MM USD) 0.00 0.33 1.48 2.68 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2022 86 HAZARDOUS WASTE Hazardous Waste US & Canada (%) 29 16 19 21 Hazardous Waste Latin America (%) 5 5 6 6 Hazardous Waste Europe (%) 36 51 41 34 Hazardous Waste Asia Pacific (%) 27 25 30 36 Hazardous Waste Middle East & Africa (%) 3 3 4 3 Total Hazardous Waste (MT) 3,480 3,177 3,792 3,850 WATER Total Water Withdrawal (1000 m3) 1,356 1,801 1,796 1,738 Total Water Withdrawal Intensity (m3/MT Sales) 2.90 4.05 3.63 3.87 Total Wastewater Discharge (1000 m3) 892 1,032 1,164 1,122 Wastewater Recycled (% of Total) 34 43 35 35 Total Water Related NoV (#) 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) 38 35 30 28 Water Minimization Projects (#) 4 6 19 19 Annual Diversion from Water Minimization Projects (1000 m3) 9 19 55 115 Capital Invested in Water Minimization ($MM USD) 0.04 0.38 0.24 0.07 CERTIFIED ENVIRONMENTAL MANAGEMENT SYSTEMS Facilities externally certified to ISO14001/RC14001 (%)4 N/A 50 52 57 Facilities externally certified to ISO50001 (# of high energy sites)4 2 2 2 2 Suppliers externally certified ISO14001 (% of surveyed) N/A 70 75 72 Suppliers externally certified to ISO50001 (% of surveyed) N/A 17 19 24 * Includes estimated full year performance of APM acquisition ** 2019 baseline data revised to account for acquisition pro-forma performance and divestitures 1 Refer to CDP Climate Change Report for finalized Energy/Emissions information at https://www.avient.com/company/sustainability/sustainability-report/reporting/cdp-climate-change-report 2 Estimates.

Sustainability Report | 2020 33Sustainability Report | 2020 33 https://www.avient.com/company/policies-and-governance/global-policy-anti-bribery-and-anti-corruption http://linkedinlearning.com 1000 2000 3000 4000 5000 6000 7000 8000 700 1400 2100 2800 3500 Customer Centric Selling CCS is at the core of how we serve our customers and collaborate with them to solve their most pressing challenges. Certificates can be found at: https://www.avient.com/company/policies-and-governance/global-iso-certificate-library Sustainability Report | 2020 83 https://www.avient.com/company/policies-and-governance/global-iso-certificate-library Category 2016 2017 2018 2019* 2020* ENERGY 1 Total Energy (GJ) 677,579 775,091 869,390 1,523,524 1,547,647 Energy Intensity (MWh/MT Production) 0.99 0.86 0.91 0.95 0.98 Renewable Electricity (%) 0 0 0.49 0.69 31 Total Self-Generated Energy (GJ) 0 0 3808 4588 5001 Energy Saving Activities (#) NA 26 45 60 74 Annual Savings from Energy Saving Activities (Cumulative MWh) 0 1,507 4,116 11,570 16,978 PERCENT ENERGY (%) Purchased Electricity 73.18 75.11 Purchased Natural Gas 25.80 21.02 Purchased Steam 0.00 0.00 Purchased Diesel Fuel 1.02 3.87 EMISSIONS Greenhouse Gas Emissions (MT Scope 1 GHG) 33,362 21,527 11,882 18,749 21,092 Greenhouse Gas Emissions (MT Scope 2 GHG) 238,100 244,927 85,112 155,086 87,776 Greenhouse Gas Emissions (MT Scope 3 GHG)2,3 NA NA 193,483 564,359 1,440,584 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) 254,995 275,811 96,994 173,835 108,868 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Production) 0.43 0.35 0.38 0.39 0.25 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/$B Revenue) 76,346 84,674 36,723 43,666 28,778 Annual GHG Emissions Avoidance from ESA & WMP (Cumulative MT) 0 1,548 6,668 13,558 19,746 Reportable Releases (above permitted limits) 0 0 0 0 0 EMISSIONS OF SOx/NOx/VOC/HAPS SOx 0.04 0.05 0.06 0.08 0.08 NOx 0.05 0.05 0.06 0.09 0.08 VOC 30.28 32.18 31.14 43.58 40.26 Top 4 Hazardous Air Pollutants 0.49 0.58 0.60 0.98 1.00 Particulate Matter 23.29 24.70 23.76 33.78 30.99 Sustainability Report | 2020 84 Category 2016 2017 2018 2019* 2020* WASTE Total Waste (MT) 11,234 12,453 13,396 26,065 23,709 Total Waste Intensity (Kg Waste/MT Production) 17.23 20.18 17.79 58.27 54.16 Total Waste Intensity (MT Waste/$B Revenue) 993 1,572 1,357 6,547 6,267 Waste Minimization Projects (#) NA 47 44 68 59 Percent of Total Waste Recycled/Beneficially Reused (%) 67.31 57.07 62.65 48.79 47.43 Percent of Total Waste Landfilled (%) 29.55 40.77 35.11 45.82 41.82 Total Waste Landfilled (MT) 3,320 5,077 4,703 11,943 9,915 Total Non-Hazardous Waste (MT) NA NA 12,722 24,135 21,823 HAZARDOUS WASTE Hazardous Waste US & Canada (%) NA NA NA 1.0 1.3 Hazardous Waste Latin America (%) NA NA NA 6.4 6.9 Hazardous Waste Europe (%) NA NA NA 51.4 60.2 Hazardous Waste Asia Pacific (%) NA NA NA 35.6 26.4 Hazardous Waste Middle East & Africa (%) NA NA NA 5.6 5.2 Total Hazardous Waste (MT) NA NA 674.35 1,930 1,886 WATER Total Water Withdrawal (1000 m3) 498 662 666 1,159 1,309 Total Water Withdrawal Intensity (m3/MT Production) 2.58 2.64 2.57 2.59 2.99 Total Wastewater Discharge (1000 m3) NA NA NA 691 553 Wastewater Recycled (% of Total) NA NA NA 40.38 57.75 Total Water Related NoV (#) 0 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) NA NA NA 39.3 40.8 * Includes full calendar year data for Clariant Masterbatch acquired sites unless otherwise noted at the metric level. 1 Refer to CDP Climate Change Report for additional detail and finalized Energy/Emissions information. 2 Not all Scope 3 emissions from Clariant Masterbatch acquired sites available at the time of this report. 3 Year-over-year change due to increased data coverage and revised emission factors.

CCS Customer Centric Selling 1000 2000 3000 4000 5000 6000 7000 8000 Associates Trained in LSS (Cumulative) LSS Projects Completed (Cumulative) 2009 2011 2013 2015 2017 2019 500 1000 1500 2000 2500 3000 3500 2009 2011 2013 2015 2017 2019 Sustainability Report | 2019 24 Since 2013, the executive leadership selects 14–16 high performing, high potential associates each year to participate in the NextGen leadership development program. Sustainability Report | 2019 86 Total TRIR (#—Direct) 0.74 0.69 0.51 0.56 Total TRIR (#—Contractors) 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 51 43 35 36 Recordable Illnesses (Total #) 0 0 0 0 Total LTIR (#—Direct) 0.29 0.20 0.13 0.29 Total LTIR (#—Contractors) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Direct) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Contractors) 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 Residual Risk Reduction (# of assessments) NA NA 13,267 7,102 Residual Risk Point Reduction (#) NA NA 1,035,177 864,997 EH&S Internal Audits (#) 40 53 53 58 Workers covered by an EH&S Management Systems (%) 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 Facilities covered by an externally certified EH&S MS (%) 20 24 30 35 Transport Incidents (#—US DOT 5800/EU ADR) 0 0 0 0 Capital Invested in EH&S ($MM USD) 5.305 5.201 8.858 7.870 Sustainability Report | 2019 87 ENERGY Total Energy (GJ) 677,579 775,091 869,390 899,679 Energy Intensity (MWh/MT Production) 0.99 0.86 0.91 0.85 Renewable Energy (%) 0 0 0.49 0.69 Total Self-Generated Energy (GJ) 0 0 3808 4588 Energy Saving Activities (#) NA 26 45 60 Cumulative Annual Savings from Energy Saving Activities (MWh) 0 1,507 2,609 6,879 PERCENT ENERGY (%) Purchased Electricity 73.18 Purchased Natural Gas 25.80 Purchased Steam 0.00 Purchased Diesel Fuel 1.02 EMISSIONS Greenhouse Gas Emissions (MT Scope 1 GHG) 33,362 21,527 11,882 12,767 Greenhouse Gas Emissions (MT Scope 2 GHG) 238,100 244,927 85,112 87,427 Greenhouse Gas Emissions (MT Scope 3 GHG) NA NA 193,483 584,622 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) 254,995 275,811 96,994 100,194 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Production) 0.43 0.35 0.38 0.34 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/$B Revenue) 76,346 84,674 36,723 37,872 Cumulative Annual GHG Emissions Avoidance from ESAs (MT) 0 1,548 2,609 6,879 Reportable Releases (Above Permitted Limits) 0 0 0 0 EMISSIONS OF SOx/NOx/VOC/HAPS SOx (MT) 0.04 0.05 0.06 0.06 NOx (MT) 0.05 0.05 0.06 0.06 VOC (MT) 30.28 32.18 31.14 29.22 Top 4 Hazardous Air Pollutants (MT) 0.49 0.58 0.60 0.55 Particulate Matter (MT) 23.29 24.70 23.76 22.21 WASTE Total Waste (MT) 11,234 12,453 13,396 13,273 Total Waste Intensity (Kg Waste/MT Production) 17.23 20.18 17.79 19.70 Total Waste Intensity (MT Waste/$B Revenue) 993 1,572 1,357 2,008 Percent of Total Waste Recycled/ Beneficially Reused (%) 67.31 57.07 62.65 51.87 Percent of Total Waste Landfilled (%) 29.55 40.77 35.11 43.88 Total Hazardous Waste (MT) NA NA 674.35 730.26 Waste Minimization Projects (#) NA 47 44 68 WATER Total Water Withdrawal (1000 m3) 498 662 666 565 Total Water Withdrawal Intensity (m3/MT Production) 2.58 2.64 2.57 1.91 Total Water Related NoV (#) 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) NA NA NA 22.1 Sustainability Report | 2019 88 INDICES Sustainability Report | 2019 89Sustainability Report | 2019 89 GRI Standards Content Index Organizational Profile 102–1 Name of the organization About Avient—Who We Are 102–2 Activities, brands, products, and services Products—All Sections Avient products are not banned in any market. 102–3 Location of headquarters PolyOne 2019 Annual Report—Form 10-K Cover Page 102–4 Location of operations About Avient—Where We Are: Global Locations PolyOne 2019 Annual Report—Form 10-K Page 11 102–5 Ownership and legal form PolyOne 2019 Annual Report—Form 10-K Cover Page 102–6 Markets served About Avient—Communities Counting on Avient 102–7 Scale of the organization Performance—Performance Overview PolyOne 2019 Annual Report—Form 10-K Pages 2–10 & 15 102–8 Information on employees and other workers People—All Sections PolyOne 2019 Annual Report—Form 10-K Pages 2 & 4 Currently we report on the number of associates.

CCS Customer Centric Selling 1000 2000 3000 4000 5000 6000 7000 8000 Associates Trained in LSS (Cumulative) LSS Projects Completed (Cumulative) 2009 2011 2013 2015 2017 2019 500 1000 1500 2000 2500 3000 3500 2009 2011 2013 2015 2017 2019 Sustainability Report | 2019 24 Since 2013, the executive leadership selects 14–16 high performing, high potential associates each year to participate in the NextGen leadership development program. Sustainability Report | 2019 86 Total TRIR (#—Direct) 0.74 0.69 0.51 0.56 Total TRIR (#—Contractors) 0.00 0.00 0.00 0.00 Recordable Injuries (Total #) 51 43 35 36 Recordable Illnesses (Total #) 0 0 0 0 Total LTIR (#—Direct) 0.29 0.20 0.13 0.29 Total LTIR (#—Contractors) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Direct) 0.00 0.00 0.00 0.00 Total Fatality Rate (#—Contractors) 0.00 0.00 0.00 0.00 Process Safety Incident Count (#) 0 0 0 0 Process Safety Total Incident Rate (#) 0.00 0.00 0.00 0.00 Process Safety Incident Severity Rate (#) 0.00 0.00 0.00 0.00 Residual Risk Reduction (# of assessments) NA NA 13,267 7,102 Residual Risk Point Reduction (#) NA NA 1,035,177 864,997 EH&S Internal Audits (#) 40 53 53 58 Workers covered by an EH&S Management Systems (%) 100 100 100 100 Workers covered by an internally audited EH&S MS (%) 100 100 100 100 Facilities covered by an externally certified EH&S MS (%) 20 24 30 35 Transport Incidents (#—US DOT 5800/EU ADR) 0 0 0 0 Capital Invested in EH&S ($MM USD) 5.305 5.201 8.858 7.870 Sustainability Report | 2019 87 ENERGY Total Energy (GJ) 677,579 775,091 869,390 899,679 Energy Intensity (MWh/MT Production) 0.99 0.86 0.91 0.85 Renewable Energy (%) 0 0 0.49 0.69 Total Self-Generated Energy (GJ) 0 0 3808 4588 Energy Saving Activities (#) NA 26 45 60 Cumulative Annual Savings from Energy Saving Activities (MWh) 0 1,507 2,609 6,879 PERCENT ENERGY (%) Purchased Electricity 73.18 Purchased Natural Gas 25.80 Purchased Steam 0.00 Purchased Diesel Fuel 1.02 EMISSIONS Greenhouse Gas Emissions (MT Scope 1 GHG) 33,362 21,527 11,882 12,767 Greenhouse Gas Emissions (MT Scope 2 GHG) 238,100 244,927 85,112 87,427 Greenhouse Gas Emissions (MT Scope 3 GHG) NA NA 193,483 584,622 Greenhouse Gas Emissions (MT Scope 1 & 2 GHG) 254,995 275,811 96,994 100,194 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/ MT Production) 0.43 0.35 0.38 0.34 Greenhouse Gas Emissions Intensity (MT 1&2 GHG/$B Revenue) 76,346 84,674 36,723 37,872 Cumulative Annual GHG Emissions Avoidance from ESAs (MT) 0 1,548 2,609 6,879 Reportable Releases (Above Permitted Limits) 0 0 0 0 EMISSIONS OF SOx/NOx/VOC/HAPS SOx (MT) 0.04 0.05 0.06 0.06 NOx (MT) 0.05 0.05 0.06 0.06 VOC (MT) 30.28 32.18 31.14 29.22 Top 4 Hazardous Air Pollutants (MT) 0.49 0.58 0.60 0.55 Particulate Matter (MT) 23.29 24.70 23.76 22.21 WASTE Total Waste (MT) 11,234 12,453 13,396 13,273 Total Waste Intensity (Kg Waste/MT Production) 17.23 20.18 17.79 19.70 Total Waste Intensity (MT Waste/$B Revenue) 993 1,572 1,357 2,008 Percent of Total Waste Recycled/ Beneficially Reused (%) 67.31 57.07 62.65 51.87 Percent of Total Waste Landfilled (%) 29.55 40.77 35.11 43.88 Total Hazardous Waste (MT) NA NA 674.35 730.26 Waste Minimization Projects (#) NA 47 44 68 WATER Total Water Withdrawal (1000 m3) 498 662 666 565 Total Water Withdrawal Intensity (m3/MT Production) 2.58 2.64 2.57 1.91 Total Water Related NoV (#) 0 0 0 0 Withdrawal & Consumed from High Water Stress Areas (% of Total) NA NA NA 22.1 Sustainability Report | 2019 88 INDICES Sustainability Report | 2019 89Sustainability Report | 2019 89 GRI Standards Content Index Organizational Profile 102–1 Name of the organization About Avient—Who We Are 102–2 Activities, brands, products, and services Products—All Sections Avient products are not banned in any market. 102–3 Location of headquarters PolyOne 2019 Annual Report—Form 10-K Cover Page 102–4 Location of operations About Avient—Where We Are: Global Locations PolyOne 2019 Annual Report—Form 10-K Page 11 102–5 Ownership and legal form PolyOne 2019 Annual Report—Form 10-K Cover Page 102–6 Markets served About Avient—Communities Counting on Avient 102–7 Scale of the organization Performance—Performance Overview PolyOne 2019 Annual Report—Form 10-K Pages 2–10 & 15 102–8 Information on employees and other workers People—All Sections PolyOne 2019 Annual Report—Form 10-K Pages 2 & 4 Currently we report on the number of associates.