of incorporation or organization) Avient Center 33587 Walker Road, 44012 Avon Lake, Ohio (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code (440) 930-1000 Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Shares, par value $.01 per share AVNT 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. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 1-440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com. Senior Vice President, Chief Technology Officer JOEL RATHBUN Senior Vice President, Mergers and Acquisitions KYLE G.

STOCK PERFORMANCE PolyOne’s stock performance has significantly outpaced the S&P 500 index and the S&P Mid Cap Chemicals index. 12.31.09 12.31.10 12.31.11 12.31.12 12.31.13 12.31.14 12.31.15 12.31.16 OPERATING INCOME % OF SALES Color, Additives & Inks Specialty Engineered Materials PP&S Distribution Designed Structures & Solutions 2006 “Where we were” 1.7% 1.1% 5.5% 2.6% N/A 2016 “Where we are” 16.0% 14.3% 11.1% 6.4% -0.9% 2020 Platinum Vision 20% + 20% + 12–14% 6.5–7.5% 8–10% 500 400 300 200 100 0 P E R C E N TA G E POL S&P MID CAP CHEMICALS S&P 500 A N N U A L D IV ID E N D $ /S H A R E RETURNING CASH TO SHAREHOLDERS .50 .40 .30 .20 .10 5+30+36+45+59+80+88+95 2.20 2.00 1.80 1.60 1.40 1.20 1.00 .80 .60 .40 .20 0 ADJUSTED EARNINGS PER SHARE*^ U .S . 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. Swanson Director, Investor Relations Phone: 440-930-1018 Email: eric.swanson@polyone.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on PolyOne’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.polyone.com.

Our range of offerings is RoHS-compliant, with non-phthalate versions available for applications that must meet the most severe international regulatory standards.

Mevopur™ ProTect Oxygen Scavenger extends shelf life for PET pharma packaging by limiting oxygen (O2) degradation for drugs and nutraceuticals stored in bottles, even in transparent mono-layer versions. ColorMatrix™ Amosorb™ 4020R addresses this performance issue and is the latest in a portfolio of solutions Avient has developed to enable high-quality recycled packaging.

CHAPTER 3 | PART DESIGN GUIDELINES Wall Thickness (mm) C o o li n g T im e ( S e c ) 40 35 30 25 20 15 10 5 0 0 1 2 3 4 ABS PC Nylon 6/6 Figure 2 - Designing for Wall Thickness Changes Bad Better Recommended Recommended Poor High Stress Ideal Figure 3 - Internal and External Radius Guidelines .5W Min Inside Rad + W Poor High Volume FIGURE 1 - Wall thickness vs. cooling time of various plastics FIGURE 2 - Designing for wall thickness changes FIGURE 3 - Internal and external radius guidelines Design Guide 9 RIB DESIGN GUIDELINES The minimum distance ribs should be spaced is three times the nominal wall thickness (3W).

Employer Identification No.) of incorporation or organization) 33587 Walker Road, Avon Lake, Ohio 44012 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code (440) 930-1000 Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Shares, par value $.01 per share AVNT 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. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com. Senior Vice President, Chief Technology Officer JOEL RATHBUN Senior Vice President, Mergers and Acquisitions KYLE G.

CHAPTER 3 | PART DESIGN GUIDELINES Wall Thickness (mm) C o o li n g T im e ( S e c ) 40 35 30 25 20 15 10 5 0 0 1 2 3 4 ABS PC Nylon 6/6 Figure 2 - Designing for Wall Thickness Changes Bad Better Recommended Recommended Poor High Stress Ideal Figure 3 - Internal and External Radius Guidelines .5W Min Inside Rad + W Poor High Volume FIGURE 1 - Wall thickness vs. cooling time of various plastics FIGURE 2 - Designing for wall thickness changes FIGURE 3 - Internal and external radius guidelines Design Guide 9 RIB DESIGN GUIDELINES The minimum distance ribs should be spaced is three times the nominal wall thickness (3W).

Employer Identification No.) of incorporation or organization) 33587 Walker Road, Avon Lake, Ohio 44012 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code (440) 930-1000 Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Shares, par value $.01 per share AVNT 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. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Treasurer and Investor Relations Phone: 440-930-1921 Email: giuseppe.disalvo@avient.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on Avient’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.avient.com.

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. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Joe Di Salvo Vice President, Investor Relations Phone: 440-930-1921 Email: giuseppe.disalvo@polyone.com AUDITORS Ernst & Young LLP 950 Main Ave., Suite 1800 Cleveland, OH 44113 INTERNET ACCESS Information on PolyOne’s products and services, news releases, corporate governance, EDGAR filings, Reports on Forms 10-K and 10-Q, etc. as well as an electronic version of this annual report, are available on the Internet at www.polyone.com.

End Market Transformation(1) � �� �� �� �� �� �� 2006 2022PF(2) 2006 2022PF(2) Transportation Building & Construction Healthcare Packaging Consumer 57% 19% 58% 22% 14% 43% 9% 10% 8% 10% 4% 24% 20% 8% Defense 6% (1) End market revenue as a percent of total company revenues (2) Pro forma for the acquisition of APM and divestiture of Distribution Increased End Market Diversification Provides Sustained EPS Growth Adjusted EPS Growth 2006 2018 2022PF(2) $2.67 $0.14 $3.04 E ar n in g s P e r S h ar e �� ����� ����� ����� ����� ����� ����� ����� 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 75Sustainability Report | 2022 75 *Avient Sustainable Solutions definitions aligned with FTC 2012 Guide for the Use of Environmental Marketing Claims (“Green Guides”) (1Pro Forma to include full year of the Clariant Color business (2)Pro Forma for the acquisition of APM and the divestiture of Distribution Revenue from Sustainable Solutions* 2016–2022 Lightweighting Eco-conscious Sustainable Infrastructure Human Health & Safety Reduced Energy Use Biopolymers Recycle Solutions VOC Reduction 2016 2017 2018 2019 2020PF(1) 2021 2022PF(2) $790M $550M $405M $455M $340M $915M $1,175M 11% Organic CAGR Organic Future Growth Revenue Assumptions From Sustainable Solutions: 8–12% Sustainable Solutions Performance As highlighted in our Products section, Avient has a highly technical and broad portfolio of material solutions that help our customers—and our planet—be more sustainable.