A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. https://www.avient.com/investors https://edge.media-server.com/mmc/p/rgfk7qte/ https://www.avient.com/investors https://register.vevent.com/register/BIf718eaf1419a4d83a527f0aba7b74d90 https://www.avient.com/investors/events-presentations 4 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. To access Avient’s news library online, please visit www.avient.com/news.

A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. https://www.avient.com/investors https://edge.media-server.com/mmc/p/tay7mbuw/ https://www.avient.com/investors https://register-conf.media-server.com/register/BI648915d05d0c44c4bdef681472840ace https://www.avient.com/investors/events-presentations 3 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. To access Avient’s news library online, please visit www.avient.com/news.

A recording of the webcast and the slide presentation will be available at avient.com/investors/events-presentations immediately following the conference call and will be accessible for one year. https://www.avient.com/investors https://edge.media-server.com/mmc/p/uxwr6azx/ https://www.avient.com/investors https://register-conf.media-server.com/register/BI382391ef65ac4be8a89542609691ae56 https://www.avient.com/investors/events-presentations 3 Non-GAAP Financial Measures The Company uses both GAAP (generally accepted accounting principles) and non-GAAP financial measures. To access Avient’s news library online, please visit www.avient.com/news.

subject= https://secure.ethicspoint.com/domain/media/en/gui/49178/index.html http://Avient.com http://Avient.com https://secure.ethicspoint.com/domain/media/en/gui/49178/index.html Geen vergelding Avient zal geen vergelding dulden tegen iedere persoon die te goeder trouw advies inwint, een bezorgdheid uit, wangedrag meldt of die informatie geeft in een onderzoek in verband met een vermeende overtreding van de Gedragscode. Dit omvat online communicatie en sociale media. GEDRAGSCODE | 27 INHOUDSOPGAVE INLEIDING ONZE GEDRAGSCODE RESPECT VOOR IEDEREEN EERLIJKHEID OP HET WERK INTEGRITEIT IN ONS ZAKENDOEN SOCIALE VERANTWOORDELIJKHEID VAN HET BEDRIJF HULPBRONNEN https://www.avient.com/company/sustainability/sustainability-report http://Avient.com/sustainability http://Avient.com/sustainability https://www.avient.com/company/sustainability/sustainability-report/products/no-surprises-pledge-0 Vragen en Antwoorden V: Mijn supervisor heeft me gevraagd om een nieuwe afvalverwijderingsprocedure te volgen, maar ik weet niet zeker of dit wel veilig of wettelijk is.

Polym Eng Sci. 2021;1–8. wileyonlinelibrary.com/journal/pen 1 https://orcid.org/0000-0002-4114-1323 mailto:zach.zander@avient.com http://creativecommons.org/licenses/by/4.0/ http://wileyonlinelibrary.com/journal/pen http://crossmark.crossref.org/dialog/? SUPPORTING INFORMATION Additional supporting information may be found in the online version of the article at the publisher's website. Sci. 2021, 1. https://doi.org/10.1002/pen.25815 8 ZANDER ET AL. https://orcid.org/0000-0002-4114-1323 https://orcid.org/0000-0002-4114-1323 https://www.gupta-verlag.com/magazines/pu-magazine-international/02-2020 https://www.gupta-verlag.com/magazines/pu-magazine-international/02-2020 https://doi.org/10.1002/pen.25815 Microbial susceptibility of various polymers and evaluation of thermoplastic elastomers with antimicrobial additives 1 INTRODUCTION 2 EXPERIMENTS 3 RESULTS AND DISCUSSION 4 CONCLUSIONS Endnote REFERENCES

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Virgin Pulse Further supporting the wellness of our associates, we offer Virgin Pulse, an interactive, multi-faceted online platform that connects and inspires associates to make healthy, informed decisions. Through Avient Academy, associates can participate in classroom, online, and webinar based training sessions. Various levels of training are provided, depending on prior commercial experience and need, and participants train collaboratively—both online and regionally in-person to maximize collaborative learning.

 Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to:  The final amount of charges resulting from the planned North American asset realignment and the Company’s ability to realize anticipated savings and operational benefits from the asset realignment;  Our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies;  Our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive;  Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future;  The financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability;  The speed and extent of an economic recovery, including the recovery of the housing market;  Our ability to achieve new business gains;  The effect on foreign operations of currency fluctuations, tariffs, and other political, economic and regulatory risks;  Changes in polymer consumption growth rates in the markets where we conduct business;  Changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online;  Fluctuations in raw material prices, quality and supply and in energy prices and supply;  Production outages or material costs associated with scheduled or unscheduled maintenance programs;  Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters;  An inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions, employee productivity goals, and an inability to raise or sustain prices for products or services;  An inability to raise or sustain prices for products or services;  An inability to maintain appropriate relations with unions and employees;  The inability to achieve expected results from our acquisition activities;  Our ability to continue to pay cash dividends;  The amount and timing of repurchases of our common shares, if any; and  Other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation.  The above list of factors is not exhaustive.  We undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.

 Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to:  The final amount of charges resulting from the planned North American asset realignment and the Company’s ability to realize anticipated savings and operational benefits from the asset realignment;  Our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies;  Our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive;  Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future;  The financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability;  The speed and extent of an economic recovery, including the recovery of the housing market;  Our ability to achieve new business gains;  The effect on foreign operations of currency fluctuations, tariffs, and other political, economic and regulatory risks;  Changes in polymer consumption growth rates in the markets where we conduct business;  Changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online;  Fluctuations in raw material prices, quality and supply and in energy prices and supply;  Production outages or material costs associated with scheduled or unscheduled maintenance programs;  Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters;  An inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions, employee productivity goals, and an inability to raise or sustain prices for products or services;  An inability to raise or sustain prices for products or services;  An inability to maintain appropriate relations with unions and employees;  The inability to achieve expected results from our acquisition activities;  Our ability to continue to pay cash dividends;  The amount and timing of repurchases of our common shares, if any; and  Other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation.  The above list of factors is not exhaustive.  We undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.

 Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to:  The final amount of charges resulting from the planned North American asset realignment and the Company’s ability to realize anticipated savings and operational benefits from the asset realignment;  Our ability to achieve the strategic and other objectives relating to the acquisition of Spartech Corporation, including any expected synergies;  Our ability to successfully integrate Spartech and achieve the expected results of the acquisition, including, without limitation, the acquisition being accretive;  Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future;  The financial condition of our customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability;  The speed and extent of an economic recovery, including the recovery of the housing market;  Our ability to achieve new business gains;  The effect on foreign operations of currency fluctuations, tariffs, and other political, economic and regulatory risks;  Changes in polymer consumption growth rates in the markets where we conduct business;  Changes in global industry capacity or in the rate at which anticipated changes in industry capacity come online;  Fluctuations in raw material prices, quality and supply and in energy prices and supply;  Production outages or material costs associated with scheduled or unscheduled maintenance programs;  Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters;  An inability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to working capital reductions, cost reductions, employee productivity goals, and an inability to raise or sustain prices for products or services;  An inability to raise or sustain prices for products or services;  An inability to maintain appropriate relations with unions and employees;  The inability to achieve expected results from our acquisition activities;  Our ability to continue to pay cash dividends;  The amount and timing of repurchases of our common shares, if any; and  Other factors affecting our business beyond our control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation.  The above list of factors is not exhaustive.  We undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.