You may see us use both terms, MSDS and SDS, as GHS becomes more familiar in all of our global market. EUROPE: SDS for Europe can be obtained by contacting the appropriate regional office. Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

You may see us use both terms, MSDS and SDS, as GHS becomes more familiar in all of our global market. EUROPE: SDS for Europe can be obtained by contacting the appropriate regional office. Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

You may see us use both terms, MSDS and SDS, as GHS becomes more familiar in all of our global market. EUROPE: SDS for Europe can be obtained by contacting the appropriate regional office. Shipment Notification - under "Material Header" MSDS - labeled as the "Product Number" (in Section 1)

Thermoplastic and polymer composites are found in a variety of end-use products and markets, including packaging, building and construction, wire and cable, transportation, medical, furniture and furnishings, durable goods, electrical and electronics, adhesives, inks and coatings. 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: 1-855-598-2615 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: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 14, 2015 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Eric Swanson Director, Investor Relations Phone: 440-930-1013 Fax: 440-930-1446 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.

Thermoplastic and polymer composites are found in a variety of end-use products and markets, including packaging, building and construction, wire and cable, transportation, medical, furniture and furnishings, durable goods, electrical and electronics, adhesives, inks and coatings. 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: 1-855-598-2615 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: 440-930-1522 ANNUAL MEETING The annual meeting of shareholders of PolyOne will be held May 12, 2016 at 9:00 a.m. at PolyOne’s Corporate headquarters, 33587 Walker Road, Avon Lake, Ohio. FINANCIAL INFORMATION Security analysts and representatives of financial institutions are invited to contact: Eric R.

Among other responsibilities, the Non-Executive Chairman of the Board: • Chairs executive sessions of the non-employee Directors and provides feedback and perspective to the CEO regarding discussions at these sessions; • Facilitates communications between other members of the Board; • Approves meeting agendas and meeting schedules for the Board; • Communicates with the CEO regarding the quality, quantity and timeliness of the flow of information from management to the Board; • Interviews all Board candidates and provides the Governance and Corporate Responsibility Committee with recommendations on each candidate; • Maintains close contact with the Chair of each standing committee and assists in ensuring communications between each committee and the Board; • Considers the retention of advisers and consultants who report directly to the Board; and • Chairs Board meetings. The Consultant regularly attends Compensation Committee meetings, maintains regular contact with the Compensation Committee, and interacts with management to gather the data needed to prepare reports for Compensation Committee review. If you hold your shares through a bank, broker or other nominee, you must follow the instructions found on your voting instruction card, or contact your bank, broker or other nominee in order to revoke your previously delivered proxy, or participate in the Annual Meeting and vote electronically online during the Annual Meeting.

HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 82 Reporting Practice 102–52 Reporting cycle At minimum, biennial 102–53 Contact point for questions regarding the report https://www.avient.com/contact-us-now 102–54 Claims of reporting in accordance with the GRI standards This report has been prepared in accordance with the GRI Standards: Core Option Economic Topic Disclosures GRI 201: Economic 103-1, 2 and 3 Management approach—GRI 103 Performance—Performance Overview Page 66 201–1 Direct economic value generated and distributed Avient 2023 Annual Report—Form 10-K Pages 19–20 201–2 Financial implications and other risks and opportunities due to climate change Avient 2023 Annual Report—Form 10-K Page 9–10 Performance—Enterprise Risk Management Page 70 Planet—Climate Change, Energy and Greenhouse Gas (GHG) Emissions Page 53 201-3 Defined benefit plan obligations and other retirement plans Avient 2023 Annual Report—Form 10-K Pages 25 & 42 GRI 205: Anti-Corruption 103-1, 2 and 3 Management approach—GRI 103 Performance—The Highest Ethical Standards Page 68 205–1 Operations assessed for risks related to corruption Products—Supplier Collaboration Page 48 Performance—The Highest Ethical Standards; Enterprise Risk Management Pages 68, 70 205–2 Communication and training about anti-corruption policies and procedures Performance—The Highest Ethical Standards Page 68 205–3 Confirmed incidents of corruption and actions taken There were no incidents of corruption in 2023. GRI 301: Materials 301–1 Materials used by weight or volume About Avient—What We Do: Materials Science Page 12 Avient 2023 Annual Report—Form 10-K Page 3 301–2 Recycled input materials used Products—How Our Products Enable Sustainability Page 40 301–3 Reclaimed products and their packaging materials Products—How Our Products Enable Sustainability Page 40 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 83 https://www.avient.com/contact-us-now GRI 302: Energy 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52–53 302–1 Energy consumption within the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 302–2 Energy consumption outside of the organization Planet—Protecting Our Planet; Climate Change Pages 52–53 302–3 Energy intensity Metrics—Planet Data and Metrics Page 76 Our energy intensity evaluates all energy usage within the organization. 302–4 Reduction of energy consumption Planet—Protecting Our Planet; Climate Change Pages 52–53 302–5 Reductions in energy requirements of products and services Products—How Our Products Enable Sustainability Page 40 GRI 303: Water and Effluents 303–1 Interactions with water as a shared resource Planet—Water Stewardship Pages 60 303–3 Water withdrawal Planet—Water Stewardship Pages 60 Metrics—Planet Data and Metrics Page 78 GRI 305: Emissions 103–1, 2 and 3 Management approach—GRI 103 Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–1 Direct (Scope 1) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–2 Energy indirect (Scope 2) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–3 Other indirect (Scope 3) GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–4 GHG emissions intensity Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–5 Reduction of GHG emissions Planet—Protecting Our Planet; Climate Change Pages 52, 53-54 305–7 Nitrogen oxides (NOX), sulfur oxides (SOX), and other significant air emissions Planet—Conventional Air Emissions Page 61 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 84 GRI 306: Waste 103–1, 2 and 3 Management approach—GRI 103 Planet—Waste: All Sections Pages 57-58 306–1 Waste generation and significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–2 Management of significant waste-related impacts Planet—Waste: All Sections Pages 57-58 306–3 Waste generated Planet—Waste: All Sections Pages 57-58 306–4 Waste diverted from disposal Planet—Waste: All Sections Pages 57-58 306–5 Waste directed to disposal Planet—Waste: All Sections Pages 57-58 GRI 307: Environmental Compliance Products—Product Stewardship Page 45 Planet—Protecting Our Planet Page 52 Avient 2023 Annual Report—Form 10-K Pages 6–7 307–1 Non-compliance with environmental laws and regulations Products—Product Stewardship Page 45 Avient 2023 Annual Report—Form 10-K Pages 6–7 GRI 308: Supplier Environmental Assessment 308–1 New suppliers that were screened using environmental criteria Products—Product Stewardship Page 45 308–2 Negative environmental impacts in the supply chain and actions taken Products—Product Stewardship Page 45 GRI 401: Employment 103–1, 2 and 3 Management approach—GRI 103 People—Training and Development; Diversity & Inclusion Pages 23, 24 401–1 New employee hires and employee turnover People—Workforce Demographics Page 28 We hired 988 new associates in 2023 401–2 Benefits provided to full-time employees that are not provided to temporary or part-time employees People—Associate Benefits / Awards and Recognition Program; Health and Wellness Pages 27, 30 401–3 Parental leave People—Health and Wellness Page 30 HOME | Contents | Message from the CEO | About Us | People | Products | Planet | Performance | Metrics | Index Sustainability Report | 2023 85 GRI 403: Occupational Health & Safety Avient 2023 Annual Report—Form 10-K Pages 5–7 Avient’s Human Rights Policy 403–1 Occupational health and safety management system Avient 2023 Annual Report—Form 10-K Pages 5–7 People—Occupational Safety & Health Page 20 403–2 Hazard identification, risk assessment, and incident investigation People—Environmental, Health & Safety Page 18 403–3 Occupational health services People—Occupational Safety & Health Page 20 403–4 Worker participation, consultation, and communication on occupational health and safety 403–5 Worker training on occupational health and safety People—Environmental, Health & Safety; People—Training and Development Pages 18, 23 403–6 Promotion of worker health People—Occupational Safety & Health; Health and Wellness Pages 20, 30 403–7 Prevention and mitigation of occupational health and safety impacts directly linked by business relationships Products—Product Stewardship; Products—Supplier Collaboration Pages 45, 48 Avient 2023 Annual Report—Form 10-K Pages 5–7 403–8 Workers covered by an occupational health and safety management system 403–9 Work-related injuries 403–10 Work-related ill health People—Environmental, Health & Safety Page 18 GRI 404: Training & Education 10–1, 2 and 3 Management approach—GRI 103 People—Training and Development Page 23 404–1 Average hours of training per year per employee People—Training and Development; Career Training and Performance Feedback Pages 23, 31 In 2023, associates received 197,471 hours of training through a variety of delivery methods.

Fearon to serve as independent Lead Director Among other responsibilities, the independent Lead Director: Chairs�executive�sessions�of�the�non­employee�Directors�and�provides�feedback�and�perspective�to�the�Chief� Executive�Officer�regarding�discussions�at�these�sessions� Facilitates�communications�between�the�Chairman�and�other�members�of�the�Board� Provides�input�from�the�Directors�to�the�Chairman�of�the�Board�with�regard�to�agendas�and�schedules�for�Board� meetings� Advises�the�Chairman�of�the�Board�as�to�the�quality,�quantity�and�timeliness�of�the�flow�of�information�from� management�to�the�Board�and�regarding�the�effectiveness�of�Board�meetings� Interviews�all�Board�candidates,�and�provide�the�Nominating�and�Governance�Committee�with� recommendations�on�each�candidate� Maintains�close�contact�with�the�Chair�of�each�standing�committee�and�assists�in�maintaining�communications� between�each�committee�and�the�Board� Considers�the�retention�of�advisers�and�consultants�who�report�directly�to�the�Board�of�Directors� Chairs�Board�meetings�when�the�Chairman�of�the�Board�is�unable�to�do�so� Board Oversight of Risk Management The Board oversees risk management, setting appropriate “tone at the top” The Board assesses and analyzes the most likely areas of current and future risk for the Company on an on- going basis The Board regularly communicates with management regarding materials risks and to convey its expectations clearly Stock Ownership Requirements We maintain robust stock ownership requirements The stock ownership requirement for our Chief Executive Officer is 125,000 shares and for all other directors is 12,500 shares (within five years of onboarding) Board Practices Our Board annually conducts an evaluation of its performance, which includes a peer evaluation of each Director The Nominating and Governance Committee reviews criteria for Board membership and considers changes as needed so that the Board continues to reflect the appropriate mix of skills and experience Non-employee Directors may not stand for re-election following the date of the Director’s 72nd birthday, although the Board may waive this limitation if it determines such waiver to be in the best interests of the Company All Directors stand for election annually We maintain a majority voting policy for uncontested Director elections PROXY STATEMENT POLYONE CORPORATION PolyOne Center 33587 Walker Road Avon Lake, Ohio 44012 PROXY STATEMENT Dated March 29, 2018 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 17, 2018, and at any adjournments of that meeting. The Consultant maintains regular contact with the Compensation Committee and interacts with management to gather the data needed to prepare reports for Compensation Committee review.

Among other responsibilities, the independent Lead Director: • Chairs executive sessions of the non-employee Directors and provides feedback and perspective to the CEO regarding discussions at these sessions; • Facilitates communications between the Chairman of the Board and other members of the Board; • Provides input from the Directors to the Chairman of the Board with regard to agendas and schedules for Board meetings; • Advises the Chairman of the Board as to the quality, quantity and timeliness of the flow of information from management to the Board and regarding the effectiveness of Board meetings; • Interviews all Board candidates and provides the Governance and Corporate Responsibility Committee with recommendations on each candidate; • Maintains close contact with the Chair of each standing committee and assists in ensuring communications between each committee and the Board; • Considers the retention of advisers and consultants who report directly to the Board; and • Chairs Board meetings when the Chairman of the Board is unable to do so. The Consultant regularly attends Compensation Committee meetings, maintains regular contact with the Compensation Committee, and interacts with management to gather the data needed to prepare reports for Compensation Committee review. If you hold your shares through a bank, broker or other nominee, you must follow the instructions found on your voting instruction card, or contact your bank, broker or other nominee in order to revoke your previously delivered proxy, or participate in the Annual Meeting and vote electronically online during the Annual Meeting.

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