CODE DE CONDUITE | 4 NOTRE CODE DE HONNÊTETÉ AU INTÉGRITÉ DANS RESPONSABILITÉ Résoudre les questions et signaler les situations de non-conformité Notre code de conduite fournit des directives que vous pouvez utiliser pour gérer les problèmes susceptibles de se poser dans votre travail, et pour vous aider à prendre les bonnes décisions. CODE DE CONDUITE | 19 NOTRE CODE DE HONNÊTETÉ AU INTÉGRITÉ DANS RESPONSABILITÉ Intégrité dans notre activité Il est essentiel qu’avient conserve des normes éthiques élevées dans toutes ses transactions commerciales, y compris ses relations avec les clients et les fournisseurs. NOTRE CODE DE HONNÊTETÉ AU INTÉGRITÉ DANS RESPONSABILITÉ CODE DE CONDUITE | 30 http://avient.ethicspoint.com http:// avient.ethicspoint.com http://avient.ethicspoint.com Amérique du Nord Siège mondial d’Avon Lake, États-Unis 33587 Walker Road Avon Lake, Ohio, États-Unis 44012 Numéro gratuit : +1 866 765 9663 Téléphone : +1 440 930 1000 Télécopie : +1 440 930 3064 Asie Pacifique Siège régional de Shanghai, Chine 2F, Block C 200 Jinsu Road Pudong, 201206 Shanghai, Chine Téléphone : +86 (0) 21 6028 4888 Télécopie : +86 (0) 21 6028 4999 Amérique du Sud Siège régional de Sao Paulo, Brésil Av.

Emitido no dia 02/06/2021 às 11:50:19 (data e hora de Brasília).

said, "As the COVID-19 vaccine brings hope for a recovery from the pandemic, we anticipate our businesses will continue to benefit from new product development requiring sustainable solutions as well as demand for consumer and healthcare applications.  Factors that could cause actual results to differ materially from those implied by these forward-looking statements include the impact the COVID-19 pandemic has on our business, results from operations, financial condition and liquidity; our ability to achieve the strategic and other objectives relating to the acquisition of Clariant's Masterbatch business, including any expected synergies; 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 effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; changes in polymer consumption growth rates and laws and regulations regarding plastics in jurisdictions 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; our ability to continue to pay cash dividends including at the increased rate; an inability to raise or sustain prices for products or services; an ability to achieve or delays in achieving or achievement of less than the anticipated financial benefit from initiatives related to acquisitions and integration, working capital reductions, costs reductions and employee productivity goals; information systems failures and cyberattacks; 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. Attachment 4

We are delivering record results against a backdrop of incredibly challenging conditions, including the ongoing COVID-19 pandemic, significant supply chain disruptions and inflation.  Factors that could cause actual results to differ materially from those implied by these forward-looking statements include 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 effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; the current and potential future impact of the COVID-19 pandemic on our business, results of operations, financial position or cash flows including without any limitation, any supply chain and logistics issues; our ability to achieve the strategic and other objectives relating to the acquisition of Clariant's Masterbatch business, including any expected synergies; changes in polymer consumption growth rates and laws and regulations regarding plastics in jurisdictions where we conduct business; 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 the anticipated financial benefit from initiatives related to acquisition and integration working capital reductions, cost reductions and employee productivity goals; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; our ability to consummate and successfully integrate acquisitions; and amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions. Attachment 4

more than offsetting extended COVID-19 lockdowns in Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: 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 effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks, including recessionary conditions; the current and potential future impact of the COVID-19 pandemic on our business, results of operations, financial position or cash flows; changes in polymer consumption growth rates and laws and regulations regarding plastics in jurisdictions where we conduct business; 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 raise or sustain prices for products or services; our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; information systems failures and cyberattacks; amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; any material adverse changes in the Dyneema Business; our ability to achieve the strategic and other objectives relating to the Dyneema Acquisition, and the possible sale of the Distribution business segment; and other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation and any recessionary conditions. Attachment 4

© 2020, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012

© 2020, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012

© 2022, All Rights Reserved Avient Corporation, 33587 Walker Road, Avon Lake, Ohio USA 44012 ANTIMICROBIAL TECHNOLOGY, CUSTOM COLORS AND PERFORMANCE ADDITIVES IN ONE MASTERBATCH.

我们的 《行为准则》 2023 首席执行官寄语 1 我们的愿景和战略 2 核心价值观和个人价值观 2 道德行为指南 4 个人价值观 4 解决问题和举报违规情况 6 道德热线 6 禁止打击报复 6 《行为准则》的适用范围 6 违反本准则的行为 6 尊重所有人กคน 多元和包容 8 歧视或骚扰 8 工作场所关系 8 物质滥用 9 人身安全和 工作场所暴力 9 准确的信息、数据和记录 11 会计诚信 11 公司通讯 13 资产的保护和使用 13 专有和机密信息、创意和知识产权 13 隐私、个人信息和数据保护 13 互联网和电子邮件的使用 14 社交媒体和社交网络 14 计算机安全、软件许可和版权 14 内幕信息和内幕交易 14 政治献金/活动和慈善捐款 15 政府调查和询查 15 公平交易 17 贿赂和回扣 17 代理人和顾问 18 竞争 18 礼品和招待 18 利益冲突 19 假公济私 19 国际贸易 19 可持续性 21 安全、健康和环境 21 产品和服务的安全 22 尊重人权 22 共同的承诺 22 资源和联系信息 23 1 首席执行官寄语 尊敬的 Avient 员工： 作为一家迅速发展的全球性企业的一部分，我们面临着充满挑战的形势和复杂的决策过程。 遵守所有法律；及 4. 19 问：尽管我们遇到了一系列问题，但有一位客 户始终对我们忠诚。

No. 0514.02) Revised 10/08/2019 Page 1 of 2 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2005 POLYMER DIAGNOSTICS INC. 33587 Walker Road Avon Lake, OH 44012 Ana De La Ree Phone: 440-930-3271 CHEMICAL Valid To: December 31, 2019 Certificate Number: 0514.02 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following rubber and plastics tests: Test Description: Test Method or Standard: Analysis of Volatile Contaminants from Polymers (Chromatography) VDA 277 FTIR (Fourier Transform Infrared) Spectroscopy ASTM E1252 (Except 7.6, 11.2, and 11.4) Flammability Horizontal Burn of Self-Supporting Plastics ASTM D635; UL 94; IEC 60695-11-10 Horizontal Burn of Materials Used in Occupant Compartments of Motor Vehicles ASTM D5132; FMVSS 302 (49 CFR 571.302) Vertical Burn, 20 mm ASTM D3801; UL 94; IEC 60695-11-10 Vertical Burn, 125 mm ASTM D5048; UL 94; IEC 60695-11-20 Oxygen Index ASTM D2863 FT1 Flame Test UL1581, Clause 1060; UL2556/CSA C22.2 No 2556, Clause 9.3 Cable Flame Test UL1581, Clause 1061 VW1 Flame Test UL1581, Clause 1080; UL2556/CSA C22.2 No 2556, Clause 9.4 FT2/FH Flame Test UL1581, Clause 1100; UL2556/CSA C22.2 No 2556, Clause 9.1 FV-1 Flame Test UL1581, Clause 1060; UL2556/CSA C22.2 No 2556, Clause 9.5 Thin Material Burning Test UL-94 Glow Wire Test IEC 60695 2-10, 2-11, 2-12, 2-13 RVCM in PVC ASTM D4443 (A2LA Cert.