The underlying growth in these regions helped offset softer demand in Europe and Southeast Asia." 2 2024 Outlook “Looking ahead to the second quarter, we expect adjusted EPS of $0.71, a 13% increase over the prior year," said Jamie Beggs, Senior Vice President and Chief Financial Officer, Avient Corporation. To access Avient’s news library online, please visit www.avient.com/news-events. Three Months Ended March 31, Reconciliation to Consolidated Statements of Income 2024 2023 Sales $ 829.0 $ 845.7 Gross margin - GAAP 278.2 247.6 Special items in gross margin (Attachment 3) 0.4 8.0 Adjusted gross margin $ 278.6 $ 255.6 Adjusted gross margin as a percent of sales 33.6 % 30.2 % Operating income - GAAP 94.0 57.1 Special items in operating income (Attachment 3) 6.2 27.1 Adjusted operating income $ 100.2 $ 84.2 Adjusted operating income as a percent of sales 12.1 % 10.0 % Three Months Ended March 31, Reconciliation to EBITDA and Adjusted EBITDA: 2024 2023 Net income from continuing operations - GAAP $ 49.7 $ 21.3 Income tax expense 16.8 7.7 Interest expense, net 26.6 28.8 Depreciation and amortization 44.3 50.5 EBITDA from continuing operations 137.4 108.3 Special items, before tax 6.2 27.3 Depreciation and amortization included in special items (0.5) (1.8) Adjusted EBITDA $ 143.1 $ 133.8 Adjusted EBITDA as a percent of sales 17.3 % 15.8 % Year Ended December 31, 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS Net income from continuing operations attributable to Avient shareholders $ 75.8 $ 0.83 Special items, after-tax 79.3 0.86 Amortization expense, after-tax 61.5 0.67 Adjusted net income / EPS $ 216.6 $ 2.36 13 Three Months Ended June 30, 2023 Reconciliation to Condensed Consolidated Statements of Income $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 Special items, after-tax 19.6 0.21 Amortization expense, after-tax 16.2 0.18 Adjusted net income / EPS $ 57.9 $ 0.63 NEWS RELEASE Attachment 1

Avery Johnson, Vice President, Tax 

We are looking forward to sharing how and where our material science is helping customers achieve their sustainability goals and the megatrends that are underpinning the future growth of our sustainable solutions portfolio.” To access Avient’s news library online, please visit www.avient.com/news. Three Months Ended June 30, 2023 Three Months Ended June 30, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 22.1 $ 0.24 $ 62.8 $ 0.68 Special items, after tax (Attachment 3) 19.6 0.21 3.2 0.03 Amortization expense, after-tax 16.2 0.18 10.5 0.12 Adjusted net income / EPS $ 57.9 $ 0.63 $ 76.5 $ 0.83 Six Months Ended June 30, 2023 Six Months Ended June 30, 2022 Reconciliation to Condensed Consolidated Statements of Income $ EPS $ EPS Net income from continuing operations attributable to Avient shareholders $ 42.9 $ 0.47 $ 127.2 $ 1.38 Special items, after tax (Attachment 3) 41.9 0.46 9.6 0.10 Amortization expense, after-tax 31.3 0.34 21.3 0.23 Adjusted net income / EPS $ 116.1 $ 1.27 $ 158.1 $ 1.71 8 Attachment 2 Avient Corporation Condensed Consolidated Statements of Income (Unaudited) (In millions, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Sales $ 824.4 $ 891.0 $ 1,670.1 $ 1,783.2 Cost of sales 583.7 630.1 1,181.8 1,267.9 Gross margin 240.7 260.9 488.3 515.3 Selling and administrative expense 178.4 160.8 368.9 313.0 Operating income 62.3 100.1 119.4 202.3 Interest expense, net (29.4) (16.2) (58.2) (33.1) Other (expense) income, net (0.2) 1.6 0.5 1.0 Income from continuing operations before income taxes 32.7 85.5 61.7 170.2 Income tax expense (10.4) (22.7) (18.1) (42.7) Net income from continuing operations 22.3 62.8 43.6 127.5 Income (loss) from discontinued operations, net of income taxes — 21.9 (0.9) 41.7 Net income 22.3 84.7 42.7 169.2 Net income attributable to noncontrolling interests (0.2) — (0.7) (0.3) Net income attributable to Avient common shareholders $ 22.1 $ 84.7 $ 42.0 $ 168.9 Earnings (loss) per share attributable to Avient common shareholders - Basic: Continuing operations $ 0.24 $ 0.69 $ 0.47 $ 1.39 Discontinued operations — 0.24 (0.01) 0.46 Total $ 0.24 $ 0.93 $ 0.46 $ 1.85 Earnings (loss) per share attributable to Avient common shareholders - Diluted: Continuing operations $ 0.24 $ 0.68 $ 0.47 $ 1.38 Discontinued operations — 0.24 (0.01) 0.45 Total $ 0.24 $ 0.92 $ 0.46 $ 1.83 Cash dividends declared per share of common stock $ 0.2475 $ 0.2375 $ 0.4950 $ 0.4750 Weighted-average shares used to compute earnings per common share: Basic 91.1 91.4 91.1 91.4 Diluted 91.9 92.1 91.9 92.2 9 Attachment 3 Avient Corporation Summary of Special Items (Unaudited) (In millions, except per share data) Special items (1) Three Months Ended June 30, Six Months Ended June 30, 2023 2022 2023 2022 Cost of sales: Restructuring costs, including accelerated depreciation $ (1.2) $ (2.6) $ (7.8) $ (7.0) Environmental remediation costs (13.0) (3.0) (14.4) (5.0) Reimbursement of previously incurred environmental costs — 7.6 — 8.2 Impact on cost of sales (14.2) 2.0 (22.2) (3.8) Selling and administrative expense: Restructuring (0.5) (2.9) (11.9) (1.3) Legal and other (6.4) 1.2 (10.6) 1.5 Acquisition related costs (0.7) (2.1) (4.2) (5.0) Impact on selling and administrative expense (7.6) (3.8) (26.7) (4.8) Impact on operating income (21.8) (1.8) (48.9) (8.6) Other income (loss), net 0.1 0.9 (0.1) 1.0 Impact on income from continuing operations before income taxes (21.7) (0.9) (49.0) (7.6) Income tax expense (benefit) on above special items 5.5 0.2 12.4 2.0 Tax adjustments(2) (3.4) (2.5) (5.3) (4.0) Impact of special items on net income from continuing operations $ (19.6) $ (3.2) $ (41.9) $ (9.6) Diluted earnings per common share impact $ (0.21) $ (0.03) $ (0.46) $ (0.10) Weighted average shares used to compute adjusted earnings per share: Diluted 91.9 92.1 91.9 92.2 (1) Special items include charges related to specific strategic initiatives or financial restructuring such as: consolidation of operations; debt extinguishment costs; costs incurred directly in relation to acquisitions or divestitures; employee separation costs resulting from personnel reduction programs, plant realignment costs, executive separation agreements; asset impairments; settlement gains or losses and mark-to- market adjustments associated with gains and losses on pension and other post-retirement benefit plans; environmental remediation costs, fines, penalties and related insurance recoveries related to facilities no longer owned or closed in prior years; gains and losses on the divestiture of operating businesses, gains and losses on facility or property sales or disposals; results of litigation, fines or penalties, where such litigation (or action relating to the fines or penalties) arose prior to the commencement of the performance period; one-time, non-recurring items; and the effect of changes in accounting principles or other such laws or provisions affecting reported results

ColorMatrix™ Select™ Rapid Color Prototyping Technology Color creation, selection and supply service for greater control, choice and speed in color development for injection molded plastic products WHAT IT IS With the ColorMatrix™ Select™ system, managing your own color creation and supply online couldn’t be easier. TECHNOLOGY COMPONENTS Select Rapid Color Prototyping Technology includes: Select Color Cell • Color scanning or matching • Creation of color plaques Online Software • Formulation and price generator • Web-based processor Automated Dispenser • Globally standard base colors • Consistent production from recipes HOW IT WORKS Select allows you to: • Instantaneously create a new color using your own standards, spectrophotometer or colorimeter data, or the software’s built-in design tools • Produce small quantities of color masterbatch for use in validating your color match • Combine advanced liquid colorants, cloud-access software and automated dispensing technology • Carry out color modeling and rapid iteration Select also helps you: • Choose the right color by providing a quick and cost effective way to model, sample, and test color options • Facilitate prototyping and variation testing PRODUCT BULLETIN CONVENTIONAL COLOR DEVELOPMENT PROCESS Multiple rounds of sampling, trials and approvals, usually over many weeks. Typically used within extrusion, injection molding and blow molding processes with specific benefits for: • Manufacturers – Take control of your color supply • Brand Owners – Efficient online color management • Designers – Rapid visualization of your color www.avient.com Copyright © 2020, Avient Corporation.

Homepage // News Center // PolyOne Collaborates to Help CelebriDucks Offer Safe Water Toys for Children MCHENRY, Ill. – PolyOne announced today that it has helped manufacturer CelebriDucks launch The Good Duck™, a toy for babies and children with a smooth texture for teething. To access PolyOne’s news library online, please go to www.polyone.com/news

Homepage // News Center // PolyOne Helps Schneider Electric Achieve Sustainability Goals CLEVELAND – PolyOne Corporation (NYSE: POL), a premier global provider of specialized polymer materials, services and solutions, has announced that its advanced, eco-friendly solutions are helping Schneider Electric to engineer better product performance, improve efficiency and strengthen its globally recognized sustainability strategy. To access PolyOne’s news library online, please go to www.polyone.com/news.

Homepage // News Center // PolyOne Helps Global Vision 2020 Bring the USee™ to Life Designers Brian Everett, Jane Spikowski, and John Church of PolyOne’s IQ Design team donated design time and expertise to help White, executive director of GV2020, develop his invention, a diagnostic device called the U-See™. To access PolyOne’s news library online, please go to www.polyone.com/news

Homepage // News Center // PolyOne Helps PolyCase Win “Ammo of the Year” with Polymer-Based Ammunition Patterson said, “Drawing from our full breadth of services and solutions we are uniquely positioned to help our customers introduce lighter weight, more durable and aesthetically appealing products for the outdoor enthusiast.”                                                                                        # # # To access PolyOne’s news library online, please go to www.polyone.com/news

Through PolyOne Academy, associates can participate in classroom, online, and webinar based training sessions. Special “life skills” training sessions help HYPE participants in areas like benefits enrollment and filing a personal tax return.  Tax adjustments include the net tax benefit/(expense) from one-time income tax items, the set-up or reversal of uncertain tax position reserves and deferred income tax valuation allowance adjustments.

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 identify and evaluate acquisition targets and consummate acquisitions; • The ability to successfully integrate acquired companies into our operations, retain the management teams of acquired companies, retain relationships with customers of acquired companies, and achieve the expected results of such acquisitions, including whether such businesses will be accretive to our earnings; • 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; • Information systems failures and cyber attacks; • Our ability to continue to pay regular cash dividends and the amounts and timing of any future dividends; 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. Adjusted EPS attributable to PolyOne common shareholders is calculated as follows: 2009* 2010* 2011* 2012* 2013* 2014* 2015* 2016 2017 Net income from continuing operations attributable to PolyOne common shareholders $ 106.7 $ 152.5 $ 153.4 $ 53.3 $ 94.0 $ 78.0 $ 144.6 $ 166.4 $ 173.5 Joint venture equity earnings, after tax (19.0) (14.7) (3.7) — — — — — — Special items, before tax(1) (48.7) 24.2 (48.1) 55.1 46.3 164.2 87.6 23.8 32.9 Special items, tax adjustments(1) (27.2) (96.7) (24.7) (18.9) (13.7) (73.7) (58.7) (15.9) (24.8) Adjusted net income from continuing operations attributable to PolyOne common shareholders $ 11.8 $ 65.3 $ 76.9 $ 89.5 $ 126.6 $ 168.5 $ 173.5 $ 174.3 $ 181.6 Diluted shares 93.4 96.0 94.3 89.8 96.5 93.5 88.7 84.6 82.1 Adjusted EPS attributable to PolyOne common shareholders $ 0.13 $ 0.68 $ 0.82 $ 1.00 $ 1.31 $ 1.80 $ 1.96 $ 2.06 $ 2.21 * Historical results are shown as presented in prior filings and have not been updated to reflect subsequent changes in accounting principle, discontinued operations or the related resegmentation Tax adjustments include the net tax expense/benefit from one-time income tax items, the set-up or reversal of uncertain tax position reserves and deferred income tax valuation allowance adjustments.