It can be combined with liquid colorant to offer an all-in-one color and barrier formulation with visible light protection up to 595nm. SEARCH INVESTOR NEWS

The new panels are currently available through Composites One, a leading materials distributor to the marine industry. SEARCH INVESTOR NEWS

Fiber-Line provides material science and polymer formulation expertise to engineer specified performance characteristics for fiber.  Patterson added, "This acquisition represents a significant investment for our Specialty Engineered Materials segment.  SEARCH INVESTOR NEWS

Avient will also showcase the following engineered materials: Our expanding portfolio of offerings includes colorants, advanced composites, functional additives, engineered materials, and Dyneema®, the world’s strongest fiber™. SEARCH INVESTOR 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. 2) Tax adjustments include the net tax impact from non-recurring income tax items, adjustments to uncertain tax position reserves and the establishment, reversal or changes to valuation allowances. 9 Special items (1) Three Months Ended March 31, 2023 Cost of sales: Restructuring costs, including accelerated depreciation $ (6.6) Environmental remediation costs (1.4) Impact on cost of sales (8.0) Selling and administrative expense: Restructuring and employee separation costs (11.3) Legal and other (4.4) Acquisition related costs (3.4) Impact on selling and administrative expense (19.1) Impact on operating income (27.1) Other loss (0.2) Impact on income from continuing operations before income taxes (27.3) Income tax expense on above special items 6.9 Tax adjustments(2) (1.9) Impact of special items on net income from continuing operations $ (22.3) Diluted earnings per common share impact $ (0.24) Weighted average shares used to compute adjusted earnings per share: Diluted 91.8 (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 Three Months Ended December 31, Year Ended December 31, 2023 2022 2023 2022 Sales: Color, Additives and Inks $ 459.4 $ 490.8 $ 2,007.4 $ 2,355.0 Specialty Engineered Materials 259.8 300.8 1,138.2 1,044.4 Corporate (0.2) (1.2) (2.8) (2.5) Sales $ 719.0 $ 790.4 $ 3,142.8 $ 3,396.9 Gross margin: Color, Additives and Inks $ 148.3 $ 134.5 $ 631.2 $ 681.3 Specialty Engineered Materials 78.1 82.4 341.8 283.7 Corporate (17.5) (44.9) (80.5) (82.3) Gross margin $ 208.9 $ 172.0 $ 892.5 $ 882.7 Selling and administrative expense: Color, Additives and Inks $ 86.5 $ 90.2 $ 371.3 $ 380.3 Specialty Engineered Materials 48.7 47.2 199.3 143.6 Corporate 30.6 34.2 125.1 115.5 Selling and administrative expense $ 165.8 $ 171.6 $ 695.7 $ 639.4 Operating income: Color, Additives and Inks $ 61.8 $ 44.3 $ 259.9 $ 301.0 Specialty Engineered Materials 29.4 35.2 142.5 140.1 Corporate (48.1) (79.1) (205.6) (197.8) Operating income $ 43.1 $ 0.4 $ 196.8 $ 243.3 13 Attachment 7 Avient Corporation Reconciliation of Non-GAAP Financial Measures (Unaudited) (In millions, except per share data) Senior management uses gross margin before special items and operating income before special items to assess performance and allocate resources because senior management believes that these measures are useful in understanding current profitability levels and how it may serve as a basis for future performance.

Our new lab will enable collaboration with product designers and engineers looking to improve performance, reduce weight, or consolidate parts with continuous fiber reinforced thermoplastic tapes and laminates. Caption: PolyOne invites product designers and engineers to collaborate on material development, product design, processing, and testing in their thermoplastic composite innovation cell in Englewood, CO. SEARCH INVESTOR NEWS

CLEVELAND – April 14, 2023 – Today, Avient Corporation announced the launch of its newly upgraded, advanced computer-aided engineering (CAE) capabilities. From the beginning to the end of the design process, we aim to help our customers streamline application development, improve speed to market, and have increased confidence in the performance of reinforced polymer materials in structural applications,” said Amit Kulkarni, global director of technology, Specialty Engineered Materials at Avient. SEARCH INVESTOR NEWS

Caption: Avient adds Maxxam™ REC recycled polyolefins and Maxxam™ BIO bio-based polyolefin grades to its broad portfolio of sustainable specialty engineered materials.  With brands across many industries making commitments to incorporate more recycled and bio-based materials into their products, we are constantly developing formulations that help enable these goals,” said Matt Mitchell, director global marketing, Specialty Engineered Materials. SEARCH INVESTOR NEWS

With tremendous growth forecast for 5G networks and user adoption over the next five years, design engineers and manufacturers need advanced materials that enable faster, more efficient networks,” said Matt Mitchell, global marketing director, Specialty Engineered Materials at Avient. SEARCH INVESTOR NEWS

We can engage with design engineers worldwide and support the manufacturing of their products where they need us,” said Matt Mitchell, Director, Global Marketing of Specialty Engineered Materials at Avient. SEARCH INVESTOR NEWS