Through accurate and consistent metering, Excelite additives enable greater control of production tolerances and improve linear consistency. This process allows greater control over production tolerances, thus reducing scrap rates, improving quality, and optimizing process capacity. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment.

Avient uses a “systems approach” to develop the laser welding solution most adapted to your project, taking into consideration the following aspects: • Transmitting and absorbing parts • Polymer type and grade • Dispersion of the additive in the final part • Sufficient and consistent loading of the additive • Part design: attention to flow separation at the welding interface • Color and opacitiy • Quality control – e.g. establish suitable control parameters (UV Visible Spectra) • Laser wavelength and processing parameter Mevopur™ Healthcare Functional Additives formulated for laser welding are designed for use in healthcare applications. Some of the information arises from laboratory work with small-scale equipment which may not provide a reliable indication of performance or properties obtained or obtainable on larger-scale equipment. Please be aware that there are certain applications Avient’s Mevopur products have not been designed for, nor are they promoted or intended for use in: including, but not limited to long-term or permanent implants, birth control devices, or plastic surgery.

Activities that have the potential to adversely impact human health or the environment shall be appropriately managed, measured, controlled, and handled prior to release of any substance into the environment Comply with all applicable import and export controls, as well as trade compliance and antitrust laws Inform Avient of financial, economic, supply changes (including origin or conflict status of 3TG metals), government regulations or other materials conditions that could affect ongoing operations or operating decisions, or if the company has been debarred as a government contractor

Activities that have the potential to adversely impact human health or the environment shall be appropriately managed, measured, controlled, and handled prior to release of any substance into the environment Comply with all applicable import and export controls, as well as trade compliance and antitrust laws Inform Avient of financial, economic, supply changes (including origin or conflict status of 3TG metals), government regulations or other materials conditions that could affect ongoing operations or operating decisions, or if the company has been debarred as a government contractor

http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf http://polynet/ethics/Portals/23/documents/Cyber%20and%20Data%20Incident%20Response%20Policy/Cyber_Incident_Response_Policy-September%202018_EN%20-%20v1.pdf Confidential 6 Avient IT Department Information Systems Use Policy September 1, 2021 APPENDIX A: DEFINITIONS In addition to those terms defined within the body of this Policy, the following definitions are used: “Avient Data” – includes (a) all data and information generated, stored, collected, or processed by Avient through Information Systems; (b) all information under the control of Avient and originating from, belonging to, or received from customers, suppliers, or third parties; (c) all data and information regarding intellectual property of Avient; and (d) purely intra-Avient information connected to individual employees, such as Information System usernames, passwords, and company ID. For example, Personal Data could be an individual’s Social Security Number (SSN), name, address, date of birth, tax identification number or equivalent, credit or debit card number, or financial account number. Information Systems” – any software, hardware, firmware, data networks, physical or remote storage media, or other digital services used, owned, accessed, controlled, leased, or operated by Avient.

Use Targets What is the targeted reduction in use of the toxic substance at the facility?  No quantity Quantity Unit or     What is the targeted timeframe for this reduction?  No quantity Quantity Unit or     What is the targeted timeframe for this reduction? 

USE OF NON-GAAP MEASURES PolyOne Corporation 3 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, adjusted operating income, and return on invested capital A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

USE OF NON-GAAP MEASURES PolyOne Corporation 3 • This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. The non-GAAP financial measures include: adjusted EPS, adjusted operating income, and return on invested capital A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

The following relationships will not be considered to be material relationships that would impair a director’s independence: (i) If the director is, or has an immediate family member who is, a partner (general or limited) in, or a controlling stockholder, equity holder, executive officer, other employee, or director of, any organization to which the Company made, or from which the Company received, payments for property or services in the current or any of the past three fiscal years where the amount involved in such transaction in any such fiscal year was less than the greater of $1 million or 2% of the organization’s consolidated gross revenues for that year; (ii) If the director is, or has an immediate family member who is, a director or trustee of any organization to which the Company has made, or from which the Company has received payments for property or services, and the director (or his/her immediate family member) was not involved in the negotiations of the terms of the transaction, did not, to the extent applicable, provide any services directly to the Company, and did not receive any special benefits as a result of the transaction; or (iii) If the director, or an immediate family member of the director, serves as an officer, director or trustee of a foundation, university, charitable or other not-for-profit organization, and the Company’s discretionary charitable contributions to the organization, in the aggregate are less than the greater of $1 million or 2% of that organization’s latest publicly available annual consolidated gross revenues. The Board administers its risk oversight function directly and through its committees. 8 The Board has delegated specific risk oversight responsibility to the committees of the Board as follows: (i) the Audit Committee oversees risks related to the Company’s financial statements, financial reporting processes, internal controls, information technology, and cybersecurity; (ii) the Compensation Committee oversees risks related to the Company’s compensation programs; (iii) the Governance and Corporate Responsibility Committee oversees risks related to the Company’s programs, policies, and practices related to certain sustainability and governance matters, including a review of reports on corporate responsibility and/or sustainability published by the Company; and (iv) the Environmental, Health and Safety Committee oversees risks related to safety, health, physical security, environmental, and product stewardship matters. The Board and its Committees may, in appropriate circumstances 9 and at Company expense, consult and retain independent legal, financial or other advisors. 4.

ColorMatrix™ AAzure™ Acetaldehyde Control Technology for PET ColorMatrix™ AAzure™ Acetaldehyde Control Technology for PET ColorMatrix™ AAzure™ Acetaldehyde Control Technology for PET