DOC ID ----> 202018203934 DOC ID ----> 202018203934 Page 1 of 2Form 540 Last Revised: 06/2019 Toll Free: 877.767.3453 | Central Ohio: 614.466.3910 OhioSoS.gov | business@OhioSoS.gov File online or for more information: OhioBusinessCentral.gov Certificate of Amendment (For-Profit, Domestic Corporation) Filing Fee: $50 Form Must Be Typed Check appropriate box: Amendment to existing Articles of Incorporation (125-AMDS) Amended and Restated Articles (122-AMAP) - The following articles supersede the existing articles and all amendments thereto. Check one box below and provide information as required: Complete the following information: Form 540 Prescribed by: POLYONE CORPORATION 1181191 1701.70(B)(6) DOC ID ----> 202018203934 Page 2 of 2Form 540 Last Revised: 06/2019 A copy of the resolution of amendment is attached to this document.

Improves recyclability for blended resins while reducing energy required during injection-stretch blow molding by up to 35%. N95 and surgical masks both rely on multi-layer construction, with a middle layer made from melt-blown non-woven material. With proper ingredient selection and processing, MagIQ™ Non-Woven Electret Plus helped the middle layer of these protective masks effectively trap particles as small as 0.3 microns.

Improves recyclability for blended resins while reducing energy required during injection-stretch blow molding by up to 35%. N95 and surgical masks both rely on multi-layer construction, with a middle layer made from melt-blown non-woven material. With proper ingredient selection and processing, MagIQ™ Non-Woven Electret Plus helped the middle layer of these protective masks effectively trap particles as small as 0.3 microns.

These advanced, comprehensive solutions help customers meet their sustainability goals while also improving performance."  Comptek, SilCoTec, Gordon Composites and Polystrand, including whether such businesses will be accretive, retain the management teams of acquired businesses, and retain relationships with customers of acquired businesses; 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; 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 and laws and regulations regarding the disposal of plastic 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; 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 and employee productivity goals; an inability to raise or sustain prices for products or services; our ability to continue to pay cash dividends, including at the increasing rate, which will be subject to, among other factors, market conditions, our cash flow and cash requirements and restrictions contained in any of our debt agreements; 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.

He shares my and our Board’s philosophy and strategy, while bringing his own unique perspective and background. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: 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 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 and employee productivity goals; 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 company will continue to operate and invest in its facilities in Novo Hamburgo and Itupeva, Brazil, while offering specialty solutions throughout the region. Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: the effect on foreign operations of currency fluctuations, tariffs, and other political, economic and regulatory risks; changes in polymer consumption growth rates where the Company conducts 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, including any developments that would require any increase in the Company’s costs and/or reserves for such contingencies; 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, and employee productivity goals; an inability to raise or sustain prices for products or services; an inability to maintain appropriate relations with unions and employees; the speed and extent of an economic recovery, including the recovery of the housing markets; the financial condition of the Company’s customers, including the ability of customers (especially those that may be highly leveraged and those with inadequate liquidity) to maintain their credit availability; disruptions, uncertainty or volatility in the credit markets that may limit the Company’s access to capital; other factors affecting the Company’s business beyond the Company’s control, including, without limitation, changes in the general economy, changes in interest rates and changes in the rate of inflation; the Company’s ability to realize anticipated savings and operational benefits from the realignment of assets, including the planned closure of certain manufacturing facilities; the timing of closings and shifts of production to new facilities related to asset realignments and any unforeseen disruptions of service or quality caused by such closings and/or production shifts; the timing of the recognition of the charges that will be incurred; separation and severance amounts and plant exit costs that differ from original estimates; amounts for non-cash charges related to asset write-offs, asset impairments, and accelerated depreciation realignments of property, plant and equipment, that differ from original estimates; the Company’s ability to identify and evaluate acquisition targets and consummate acquisitions; the ability to successfully integrate acquired companies into the Company’s operations, retain the management teams of acquired companies, and retain relationships with customers of acquired companies, including, without limitation, Spartech Corporation; and other factors described in the Company’s annual report on Form 10-K for the year ended December 31, 2013 under Item 1A, “Risk Factors.”

TEMPERATURE Material Rear °F (°C) Center °F (°C) Front °F (°C) Nozzle °F (°C) Melt °F (°C) Mold °F (°C) Nylon 6,6 14% NiCF 540–570 (280–300) 530–560 (275–290) 530–560 (275–290) 540–570 (280–300) 540–570 (280–300) 200–300 (90–150) Nylon 6,6 30% SS 540–570 (280–300) 530–560 (275–290) 530–560 (275–290) 540–570 (280–300) 540–570 (280–300) 200–300 (90–150) PBT 14% NiCF 510–410 (265–280) 490–540 (255–280) 480–530 (250–275) 480–530 (250–275) 480–530 (250–275) 150–250 (65–120) PC 14% NiCF 540–570 (280–300) 540–570 (280–300) 530–560 (275–290) 530–560 (275–290) 530–560 (275–290) 150–250 (65–120) ABS 14% NiCF 470–520 (240–270) 460–520 (240–270) 460–520 (240–270) 460–530 (240–275) 460–530 (240–275) 100–200 (40–90) PP 14% NiCF 440–480 (225–250) 440–480 (225–250) 430–470 (220–245) 420–460 (215–240) 420–460 (215–240) 125–175 (50–80) DRYING Material Temperature °F (°C) Time Minimum Moisture Maximum Moisture Nylon 6,6 14% NiCF 180 (80) 4–5 hours 0.05% 0.20% Nylon 6,6 30% SS 180 (80) 4–5 hours 0.05% 0.20% PBT 14% NiCF 250 (120) 6-8 hours 0.02% 0.03% PC 14% NiCF 250 (120) 3–4 hours 0.02% 0.02% ABS 14% NiCF 200 (90) 2–4 hours 0.05% 0.10% PP 14% NiCF 180 (80) 2–4 hours 0.20% 0.30% Equipment • Feed throats smaller than 2.5" may cause bridging due to pellet size - Larger feed throats will be more advantageous with long fiber EMI shielding resins • General purpose metering screw is recommended - Mixing/barrier screws are not recommended • L/D ratio - 18:1–20:1 (40% feed, 40% transition, 20% metering) • Low compression ratio - 2:1–3:1 • Deep flights recommended - Metering zone 3.5 mm - Feed zone 7.5 mm • Check ring - Three-piece, free-flowing check ring • General purpose nozzle (large nozzle tips are recommended) - Minimum orifice diameter of 7/32" - Tapered nozzles are not recommended for long fiber EMI shielding resins • Clamp tonnage: - 2.5–5 tons/in2 Gates • Large, free-flow gating recommended - 0.25" x 0.125" land length - 0.5" gate depth Runners • Full round gate design • No sharp corners • Minimum of 0.25" diameter • Hot runners can be used PROCESSING Screw Speed Slower screw speeds are recommended to protect fiber length Back Pressure Lower back pressure is recommended to protect fiber length Pack Pressure 60–80% of max injection pressure Hold Pressure 40–60% of max injection pressure Cool Time 10–30 seconds (depends on part geometry and dimensional stability) PROCESS CONSIDERATIONS Recommended – retain fiber length (maximize conductivity) • Low shear process • Low screw speed and screw RPM • Slow Injection speed • Fill to 99–100% on first stage of injection - Reduces potential nesting of fibers at gate location - Improves mechanical performance near gate location - Promotes ideal fiber orientation Resin Rich Surface • Achieved when using a hot mold temperature and longer cure times ≥ Max mold temperature recommendation • Improved surface aesthetic • Reduced surface conductivity • Could reduce attenuation performance in an assembly Fiber Rich Surface • Achieved when using a cold mold temperature and shorter cure times ≤ Minimum mold temperature recommendation • Improved surface aesthetic • Reduced surface conductivity • Could improve attenuation performance in an assembly www.avient.com Copyright © 2020, Avient Corporation.

Each of such adjustments has not yet occurred, are out of Avient’s control and/or cannot be reasonably predicted. To provide comparable results, the company references “pro forma” financial metrics, which include the business results of Avient Protective Materials for periods prior to the Acquisition Date, as if the transaction occurred on January 1, 2021 and reflect Distribution as a discontinued operation. The Q3 2022 "Pro Forma APM" adjustments reflect periods prior to the acquisition date and are preliminary estimates for APM’s results for the months of July and August. 2 Reconciliation of Avient consolidated pro forma EBITDA Q3 2022 Q3 2021 Avient(1) Pro forma APM(1) Pro forma Avient Avient Pro forma APM Pro forma Avient Net income from continuing operations (27.8) 3.9 (23.9) 33.4 0.3 33.7 Income tax expense (1.2) 0.6 (0.6) 2.0 2.5 4.5 Interest expense 37.3 1.8 39.1 19.0 11.2 30.2 Depreciation and amortization 39.8 10.9 50.7 36.6 18.4 55.0 EBITDA 48.1 17.2 65.3 91.0 32.4 123.4 Special items, before tax 82.0 — 82.0 19.9 — 19.9 Interest expense included in special items (10.0) — (10.0) — — — Depreciation included in special items (0.8) — (0.8) (0.9) — (0.9) Adjusted EBITDA $ 119.3 $ 17.2 $ 136.5 $ 110.0 $ 32.4 $ 142.4 (1) - Q3 2022 Avient results reflect one month of APM’s results while owned by Avient, as the acquisition closed on September 1, 2022.

To facilitate investor review, Avient has provided pro forma financial information to reflect the Distribution segment as discontinued operations and the Dyneema acquisition as if it occurred on 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; the ability to obtain required regulatory approvals and otherwise consummate the proposed sale of the Distribution business; 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. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted.

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; our ability to successfully integrate Clariant's Masterbatch business and achieve the expected results of the acquisition of Clariant's Masterbatch business, 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 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; the amount and timing of share repurchases, if any; 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. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted. Each of such adjustments has not yet occurred, are out of the Company's control and/or cannot be reasonably predicted.