lang=En&n=FD9B0E51-1 https://ec.ss.ec.gc.ca/auth/en/Services about:/ about:/ about:/ City * Orangeville Province/Territory ** Ontario Postal Code: ** L9W3K3 Physical Address Address Line 1 17 Tideman Drive City Orangeville Province/Territory ** Ontario Postal Code ** L9W3K3 Additional Information Land Survey Description National Topographical Description Parent Companies Empty Facility Validation The information in this section was copied from the Single Window Information Manager (SWIM) at the time the plan summary was created. Facility Information Facility Name: * Orangeville Plasticizer NAICS Code: * 326198 NPRI Id: * 2277 ON Reg 127/01 Id Facility Mailing Address Delivery Mode General Delivery PO Box Rural Route Number Address Line 1 15 ­ Tideman Drive City * Orangeville Province/Territory ** Ontario Postal Code: ** L9W3K3 Physical Address Address Line 1 15 Tideman Drive City Orangeville Province/Territory ** Ontario Postal Code ** L9W3K3 Additional Information Land Survey Description National Topographical Description NPRI Facility Location Latitude (decimal degrees) * 43.91330 Longitude (decimal degrees) * ­80.11580 UTM Zone UTM Easting UTM Northing Contact Validation The information in this section was copied from the Single Window Information Manager (SWIM) at the time the plan summary was created.

Attendance and Participation Our Annual Meeting will be conducted on the internet via live webcast. CORPORATE GOVERNANCE PROXY STATEMENT 2025 | Annual Meeting of Shareholders 30 Code of Ethics, Code of Conduct and Corporate Governance Guidelines In accordance with applicable NYSE listing standards and SEC regulations, the Board has adopted a Code of Ethics, Code of Conduct and Corporate Governance Guidelines. Related Person Transactions Under our Code of Conduct, we prohibit all employees, including our officers and non-employee Directors from engaging in activities that would impact their ability to carry out their duties in an independent, objective fashion.

Est-il conforme au Code et aux valeurs d’Avient? Violations du code Nous prenons très au sérieux les violations de notre Code. Ce Code a été élaboré dans le cadre des valeurs d’Avient.

Est-il cohérent avec le Code et les valeurs d’Avient ? Violations du code Nous prenons très au sérieux les violations de notre Code. Ce Code a été développé dans le cadre des valeurs d’Avient.

Business Number: 898451794 Mailing Address: Address Line 1: 17 Tideman Drive City, Province/Territory, Postal Code: Orangeville Ontario L9W3K3 Country: Canada Facility Name: Orangeville Compound NAICS Code: 326198 NPRI ID: 4358 Physical Address: Address Line 1: 17 Tideman Drive City, Province/Territory, Postal Code: Orangeville Ontario L9W3K3 Country: Canada Latitude: 43.91230 Longitude: ­80.11300 Number or Permit Number: ON9820023 Government Department, Agency, or Program Name: Ontario MOE ­ Hazardous Waste Generator Number Number or Permit Number: 0778­6DZLMV Government Department, Agency, or Program Name: Certificate of Approval Air Number or Permit Number: 5626­5DFQF2 Government Department, Agency, or Program Name: Certificate of Approval Industrial Sewage Works Contact Type Technical Contact, Company Coordinator Name: Brian Greer about:/V003/Html http://www.canada.gc.ca/home.html http://www.servicecanada.gc.ca/eng/home.shtml http://www.canada.gc.ca/aboutgov-ausujetgouv/depts/menu-eng.html https://ec.ss.ec.gc.ca/auth/en/Services about:blank# about:blank# about:blank# about:/V003/Logout_Deconnexion http://ec.gc.ca/default.asp? lang=En&n=FD9B0E51-1 https://ec.ss.ec.gc.ca/auth/en/Services about:/ about:/ about:/ General Information Substance List CAS RN Substance Name Releases Releases (Speciated VOCs) Disposals Recycling Unit NA ­ 01 Antimony (and its compounds) 0.0004 N/A N/A N/A tonnes NA ­ 02 Arsenic (and its compounds) 0.0007 N/A N/A N/A kg 103­23­1 Bis(2­ethylhexyl) adipate 0.0106 N/A N/A N/A tonnes 117­81­7 Bis(2­ethylhexyl) phthalate 0.0283 N/A N/A N/A tonnes 85­68­7 Butyl benzyl phthalate 0.0008 N/A N/A N/A tonnes NA ­ 14 Zinc (and its compounds) 0.0000 N/A N/A 0.0002 tonnes Applicable Programs CAS RN Substance Name NPRI ON MOE TRA ON MOE Reg 127/01 First report for this substance to the ON MOE TRA NA ­ 01 Antimony (and its compounds) Yes NA ­ 02 Arsenic (and its compounds) Yes 103­23­1 Bis(2­ethylhexyl) adipate Yes 117­81­7 Bis(2­ethylhexyl) phthalate Yes 85­68­7 Butyl benzyl phthalate Yes NA ­ 14 Zinc (and its compounds) Yes Position: EHS Manager Telephone: 5192150535 Email: brian.greer@polyone.com Contact Type Certifying Official Name: Najat Kamal Position: EHSQ specialist Telephone: 5148089920 Email: najat.kamal@polyone.com Number of employees: 45 Activities for Which the 20,000­Hour Employee Threshold Does Not Apply: None of the above Activities Relevant to Reporting Dioxins, Furans and Hexacholorobenzene: None of the above Activities Relevant to Reporting of Polycyclic Aromatic Hydrocarbons (PAHs): Wood preservation using creosote: No Is this the first time the facility is reporting to the NPRI (under current or past ownership): No Is the facility controlled by another Canadian company or companies: No Did the facility report under other environmental regulations or permits: No Is the facility required to report one or more NPRI Part 4 substances (Criteria Air Contaminants): No Was the facility shut down for more than one week during the year: No Operating Schedule ­ Days of the Week: Mon, Tue, Wed, Thu, Fri Usual Number of Operating Hours per day: 24 Usual Daily Start Time (24h) (hh:mm): 00:00 General Information about the Substance ­ Releases and Transfers of the Substance CAS RN Substance Name Was the substance released on­site The substance will be reported as the sum of releases to all media (total of 1 tonne or less) 1 tonne or more of a Part 5 Substance (Speciated VOC) was released to air NA ­ 01 Antimony (and its compounds) Yes Yes No NA ­ 02 Arsenic (and its compounds) Yes No No 103­23­1 Bis(2­ethylhexyl) adipate Yes Yes No 117­81­7 Bis(2­ethylhexyl) phthalate Yes Yes No 85­68­7 Butyl benzyl phthalate Yes Yes No NA ­ 14 Zinc (and its compounds) Yes No No General Information about the Substance ­ Disposals and Off­site Transfers for Recycling CAS RN Substance Name Was the substance disposed of (on­site or off­ site), or transferred for treatment prior to final disposal Is the facility required to report on disposals of tailings and waste rock for the selected reporting period Was the substance transferred off­site for recycling NA ­ 01 Antimony (and its compounds) No No No NA ­ 02 Arsenic (and its compounds) No No No 103­23­1 Bis(2­ ethylhexyl) adipate No No No 117­81­7 Bis(2­ ethylhexyl) phthalate No No No 85­68­7 Butyl benzyl phthalate No No No NA ­ 14 Zinc (and its compounds) Yes No No General Information about the Substance ­ Nature of Activities CAS RN Substance Name Manufacture the Substance Process the Substance Otherwise Use of the Substance NA ­ 01 Antimony (and its compounds) For on­site use/processing As a reactant As a by­product NA ­ 02 Arsenic (and its compounds) For on­site use/processing As a reactant As a by­product 103­23­1 Bis(2­ethylhexyl) adipate For on­site use/processing As a reactant As a by­product 117­81­7 Bis(2­ethylhexyl) phthalate For on­site use/processing As a reactant As a by­product 85­68­7 Butyl benzyl phthalate For on­site use/processing As a reactant As a by­product NA ­ 14 Zinc (and its compounds) For on­site use/processing As a reactant As a by­product On­site Releases ­ Releases to air CAS RN Substance Name Category Basis of Estimate Detail Code Quantity NA ­ 02 Arsenic (and its compounds) Stack or Point Releases O ­ Engineering Estimates 0.0000 kg NA ­ 14 Zinc (and its compounds) Stack or Point Releases O ­ Engineering Estimates 0.0000 tonnes On­site Releases ­ Releases to air ­ Total CAS RN Substance Name Total ­ Releases to Air NA ­ 02 Arsenic (and its compounds) 0.0000 kg NA ­ 14 Zinc (and its compounds) 0.0000 tonnes On­site Releases ­ Releases to land CAS RN Substance Name Category Basis of Estimate Detail Code Quantity NA ­ 02 Arsenic (and its compounds) Other O ­ Engineering Estimates 0.0007 kg Onsite Releases ­ Nature of Other Land Release CAS RN Substance Name Nature of Other Land Release NA ­ 02 Arsenic (and its compounds) Landfill disposal CAS RN Substance Name Nature of Other Land Release On­site Releases ­ Releases to land ­ Total CAS RN Substance Name Total ­ Releases to Land NA ­ 02 Arsenic (and its compounds) 0.0007 kg Total Quantity Released (All Media) CAS RN Substance Name Category Basis of Estimate Detail Code Quantity NA ­ 01 Antimony (and its compounds) Total Quantity Released O ­ Engineering Estimates 0.0004 tonnes 103­23­1 Bis(2­ethylhexyl) adipate Total Quantity Released O ­ Engineering Estimates 0.0106 tonnes 117­81­7 Bis(2­ethylhexyl) phthalate Total Quantity Released O ­ Engineering Estimates 0.0283 tonnes 85­68­7 Butyl benzyl phthalate Total Quantity Released O ­ Engineering Estimates 0.0008 tonnes On­site Releases ­ Total CAS RN Substance Name Total releases NA ­ 02 Arsenic (and its compounds) 0.0007 kg NA ­ 14 Zinc (and its compounds) 0.0000 tonnes On­site Releases ­ Quarterly Breakdown of Annual Releases CAS RN Substance Name Quarter 1 Quarter 2 Quarter 3 Quarter 4 NA ­ 01 Antimony (and its compounds) 25 25 25 25 NA ­ 02 Arsenic (and its compounds) 25 25 25 25 103­23­1 Bis(2­ethylhexyl) adipate 25 25 25 25 117­81­7 Bis(2­ethylhexyl) phthalate 25 25 25 25 85­68­7 Butyl benzyl phthalate 25 25 25 25 On­site Releases ­ Reasons for Changes in Quantities Released from Previous Year CAS RN Substance Name Reasons for Changes in Quantities from Previous Year Comments 103­23­1 Bis(2­ethylhexyl) adipate No significant change (i.e. < 10%) or no change 117­81­7 Bis(2­ethylhexyl) phthalate No significant change (i.e. < 10%) or no change 85­68­7 Butyl benzyl phthalate No significant change (i.e. < 10%) or no change NA ­ 01 Antimony (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 02 Arsenic (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 14 Zinc (and its compounds) No significant change (i.e. < 10%) or no change Disposals ­ On­site Disposal (excluding Tailings and Waste Rock) CAS RN Substance Name Category Basis of Estimate Detail Code Quantity NA ­ 14 Zinc (and its compounds) Landfill O ­ Engineering Estimates 0.0002 tonnes Disposals ­ On­site Disposal (excluding Tailings and Waste Rock) ­ Total CAS RN Substance Name Total ­ On­site Disposals NA ­ 14 Zinc (and its compounds) 0.0002 tonnes Disposals ­ Total Quantity Disposed (All Media) CAS RN Substance Name Total Quantity Disposed (All Media) NA ­ 14 Zinc (and its compounds) 0.0002 tonnes Disposals ­ Reasons and Comments CAS RN Substance Name Reasons Why Substance Was Disposed Reasons for Changes in Quantities from Previous Year Comments 103­23­1 Bis(2­ethylhexyl) adipate No significant change (i.e. < 10%) or no change 117­81­7 Bis(2­ethylhexyl) phthalate No significant change (i.e. < 10%) or no change 85­68­7 Butyl benzyl phthalate No significant change (i.e. < 10%) or no change NA ­ 01 Antimony (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 02 Arsenic (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 14 Zinc (and its compounds) Production residues No significant change (i.e. < 10%) or no change About us News Contact us Stay connected HEALTH healthycanadians.gc.ca TRAVEL travel.gc.ca SERVICE CANADA servicecanada.gc.ca JOBS jobbank.gc.ca ECONOMY actionplan.gc.ca Canada.gc.ca Terms and Conditions Transparency Version: 3.13.0 Recycling ­ Reasons and Comments CAS RN Substance Name Reasons Why Substance Was Recycled Reasons for Changes in Quantities Recycled from Previous Year Comments 103­23­1 Bis(2­ethylhexyl) adipate No significant change (i.e. < 10%) or no change 117­81­7 Bis(2­ethylhexyl) phthalate No significant change (i.e. < 10%) or no change 85­68­7 Butyl benzyl phthalate No significant change (i.e. < 10%) or no change NA ­ 01 Antimony (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 02 Arsenic (and its compounds) No significant change (i.e. < 10%) or no change NA ­ 14 Zinc (and its compounds) No significant change (i.e. < 10%) or no change Pollution Prevention Does the facility have a documented pollution prevention plan?

Stat-Tech™ ST7400-8010 ESD Formulations improved electrical conductivity for fire alarm

Stat-Tech™ ST7400-8010 ESD Formulations improved electrical conductivity for fire alarm

Electrical and/or thermal conductivity

Please review this material for information concerning the business to be conducted at the Annual Meeting and the nominees for election to our Board of Directors (the “Board”). Code of Ethics, Code of Conduct and Corporate Governance Guidelines In accordance with applicable NYSE listing standards and Securities and Exchange (“SEC”) regulations, the Board has adopted a Code of Ethics, Code of Conduct and Corporate Governance Guidelines. Preete C Chair of the Committee The Board and each Committee also conduct an annual self-evaluation and each Board member completes an assessment of his or her peers.

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