9:00 a.m.

An observable increase in Shore A durometer hardness occurred relative to the control with increased ZPT loading. ZPT- containing TPEs inhibited the growth (rating = 0) for a mixture of environmentally relevant fungal species during ASTM G21-15 testing (Table 2) and also yielded ≥3-log reductions (99.9%) in E. coli and ≥4-log reductions TABLE 3 Typical physical and mechanical properties observed for Versaflex™ GP 2810-40N thermoplastic elastomer with increasing zinc pyrithione (ZPT) loading levels Property Control ZPT loading (ppm) 1000 2000 3000 Specific gravity (g/cm3) 0.877 ± 0.001 0.877 ± 0.001 0.878 ± 0.001 0.879 ± 0.001 Hardness, Shore A 37.2 ± 1.7 39.0 ± 1.2 40.2 ± 1.4 41.1 ± 1.9 Tensile strength (MPa) 3.45 ± 0.14 3.58 ± 0.19 3.63 ± 0.16 3.57 ± 0.26 Tensile elongation (%) 712 ± 22 696 ± 24 667 ± 16 679 ± 31 300% modulus (MPa) 1.65 ± 0.12 1.73 ± 0.10 1.86 ± 0.12 1.78 ± 0.12 Viscosity at 1340 s�1 (Pa s) 38.5 ± 2.5 40.1 ± 1.6 38.9 ± 1.3 39.8 ± 0.9 Viscosity at 11 170 s�1 (Pa s) 7.8 ± 0.3 8.1 ± 0.4 8.0 ± 0.4 8.5 ± 0.4 FIGURE 3 (A) A plot of haze and yellowness index as a function of zinc pyrithione (ZPT) loading level shows a relatively monotonic relationship as well as a clear reduction in yellowness index with the addition of blue tint.

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 103­23­1 Bis(2­ethylhexyl) adipate 0.0000 N/A N/A N/A tonnes 117­81­7 Bis(2­ethylhexyl) phthalate 0.0001 N/A N/A N/A tonnes 85­44­9 Phthalic anhydride N/A N/A N/A N/A tonnes Extension 73642 Fax: 4164994687 Email: darryl.chartrand@ch2m.com Contact Type Highest Ranking Employee Name: Robert Greenop Position: Plant Manager Telephone: 5199385865 Email: robert.greenop@polyone.com Mailing Address: Address Line 1:  City, Province/Territory, Postal Code: None  Country: None Contact Type Person who prepared the report Name: Najat Kamal Position: EHSQ specialist Telephone: 5148089920 Email: najat.kamal@polyone.com Mailing Address: Delivery Mode: GeneralDelivery Address Line 1:  City, Province/Territory, Postal Code: None  Country: None Number of employees: 16 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 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): 07:00 CAS RN Substance Name Releases Releases (Speciated VOCs) Disposals Recycling Unit 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 103­23­1 Bis(2­ethylhexyl) adipate Yes Yes Yes 117­81­7 Bis(2­ethylhexyl) phthalate Yes Yes No 85­44­9 Phthalic anhydride Yes Yes No 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 103­23­1 Bis(2­ ethylhexyl) adipate Yes Yes No 117­81­7 Bis(2­ ethylhexyl) phthalate Yes Yes No 85­44­9 Phthalic anhydride No 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 103­23­1 Bis(2­ ethylhexyl) adipate No No No 117­81­7 Bis(2­ ethylhexyl) phthalate No No No 85­44­9 Phthalic anhydride No 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 103­23­1 Bis(2­ethylhexyl) adipate For sale/distribution As a formulation component As a by­product 117­81­7 Bis(2­ethylhexyl) phthalate For sale/distribution As a formulation component As a by­product 85­44­9 Phthalic anhydride As a by­product As a reactant As a by­product TRA Quantifications CAS RN Substance Name Use, Creation, Contained in Product Quantity Use ranges for public reporting 103­23­1 Bis(2­ethylhexyl) adipate Use 0.000 tonnes Yes 103­23­1 Bis(2­ethylhexyl) adipate Creation 27.159 tonnes Yes 103­23­1 Bis(2­ethylhexyl) adipate Contained in Product 27.159 tonnes Yes 117­81­7 Bis(2­ethylhexyl) phthalate Use 0.000 tonnes Yes 117­81­7 Bis(2­ethylhexyl) phthalate Creation 0.104 tonnes Yes 117­81­7 Bis(2­ethylhexyl) phthalate Contained in Product 0.104 tonnes Yes 85­44­9 Phthalic anhydride Use 4228.7 tonnes Yes 85­44­9 Phthalic anhydride Creation 0.000 tonnes Yes 85­44­9 Phthalic anhydride Contained in Product 4228.7 tonnes Yes TRA Quantifications ­ Others CAS RN Substance Name Change in Method of Quantification Reasons for Change Description of how the change impact tracking and quantification of the substance Description of how an incident(s) affected quantifications Significant Process Change 103­23­1 Bis(2­ ethylhexyl) adipate No 117­81­7 Bis(2­ ethylhexyl) phthalate No 85­44­9 Phthalic anhydride No CAS RN Substance Name Change in Method of Quantification Reasons for Change Description of how the change impact tracking and quantification of the substance Description of how an incident(s) affected quantifications Significant Process Change Total Quantity Released (All Media) CAS RN Substance Name Category Basis of Estimate Detail Code Quantity 103­23­1 Bis(2­ethylhexyl) adipate Total Quantity Released O ­ Engineering Estimates 0.0000 tonnes 117­81­7 Bis(2­ethylhexyl) phthalate Total Quantity Released O ­ Engineering Estimates 0.0001 tonnes On­site Releases ­ Quarterly Breakdown of Annual Releases CAS RN Substance Name Quarter 1 Quarter 2 Quarter 3 Quarter 4 117­81­7 Bis(2­ethylhexyl) 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. 

Webcast Details Avient will host a webcast on Wednesday, April 20, 2022 at 9:00 a.m.

NOTICE OF 2019 ANNUAL MEETING OF SHAREHOLDERS Thursday, May 16, 2019 9:00 a.m.

There is a broad spectrum of TPEs available that have higher flow lengths, however, there are some limitations at certain durometers — particularly with harder formulations that measure greater than 50 Shore A durometer.

Softer SEBS formulations (below 30 Shore A) will shrink more than harder materials.

The harder (40 Shore A and above) SEBS or SEPS formulations contain higher temperature ingredients and process at temperatures similar to polypropylene (350°F to 410°F).

Webcast Details Avient will provide additional details on its 2024 second quarter and 2024 full-year outlook during its webcast scheduled for 8:00 a.m.

8:00 a.m. 12:00 p.m.