It is better to fill out the part at slower speeds in-order to let any compressed air escape, and to get the best surface finish on the part.3 • Using all of the previous settings, record the Transfer Pressure, Fill Time, and Injection speed • Reduce the injection velocity by 10% and record the same values Transfer (psi) Fill Time (sec) Injection Velocity (in/sec) Relative Shear Rate Relative Viscosity 1238 0.20 8.00 5.00 247.60 1125 0.22 7.00 4.55 247.50 1058 0.25 6.00 4.00 264.50 960 0.35 5.00 2.86 336.12 870 0.45 4.00 2.22 391.65 780 0.58 3.00 1.72 452.59 690 0.85 2.00 1.18 586.78 600 1.35 1.00 0.74 810.45 510 2.50 0.75 0.40 1275.83 420 5.23 0.50 0.19 2198.34 330 9.56 0.25 0.10 3157.99 240 15.26 0.10 0.07 3667.49 FIGURE 47 - Injection Speed 22 Gravi-Tech • Keep reducing the injection velocity until a fill time of 10-15 seconds is reached • Calculate the Relative Viscosity for each of the Injection Speeds using the equation above (Transfer Pressure * Fill Time) • Calculate the Relative Shear Rate for each of the injection speeds using the equation (1/Fill Time) • Plot the points on a graph and find the optimum velocity • The optimum velocity will be where the curve starts to level out In figure 48 above, the optimum velocity is where the plotted line crosses the black trend line; therefore the optimum velocity would be about 1.00 in/sec.

Morgan • New Senior Secured Term Loan B and new Senior Unsecured Notes • Potential proceeds from sale of Distribution business modeled to pay off 5.25% senior notes due 2023 and Term Loan • Acquisition aligned with Avient’s track record of disciplined capital allocation policy • Existing dividend policy maintained, focus on deleveraging in the near term (1) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution, including repayment of senior notes due 2023 and Term Loan Cash and Cash Equivalents 595$ Senior Secured Term Loan due 2026 605$ New Senior Secured Term Loan B 500 Total Senior Secured Debt 1,105$ Senior Unsecured Notes due 2025 650$ New Senior Unsecured Notes 740 Total Senior Unsecured Debt 1,390$ Total Debt 2,495$ Net Debt 1,900$ 2022 Pro forma Adjusted EBITDA 660$ Net Debt / Adjusted EBITDA 2.9x Pro Forma Capitalization (2022 estimates, all figures in $M) TWO-YEAR LEVERAGE GOAL 33 3.5x 2.7x 1.7x 2.9x 2.5x 2.2x 2019PF 2020PF 2022E 2022PF 2023E 2024E Dyneema® AcquisitionClariant Color Acquisition (1) Pro forma for the acquisition of the Clariant Color business (2) Pro forma for the acquisition of Dyneema® and potential divestiture of Distribution, including repayment of senior notes due 2023 and Term Loan (1) (1) (2) 34 PRO FORMA MODELING 2022E Pro Forma Pro Forma ($M) w/ Dyneema w/Sale Revenue 5,100$ 415$ 5,515$ (1,775)$ 3,740$ Adjusted EBITDA 635 130 765 (105) 660 EBITDA % 12% 31% 14% 6% 18% Pro Forma EPS (Adjusted) 3.50$ 0.00$ 3.50$ (0.56)$ 2.94$ Pro Forma EPS (excl. amortization) 3.96$ 0.35$ 4.31$ (0.56)$ 3.75$ Leverage (12/31/2022E) Net Debt / Adjusted EBITDA 1.7x 3.5x 2.9x Avient Dyneema Distribution® ® OUR SPECIALTY JOURNEY ACQUISITION HISTORY 36 Commercial Resources(1) Operating Margins 259 360 $40 $122 Established Acquisitions (> 7 years) + 39% + 210% + 1200 bps (1) Commercial Resources include associate headcount in R&D / Technical, Marketing and Sales CLARIANT COLOR ACQUISITION 37 $133 $205 2019PF 2021 37 Clariant Color EBITDA Growth Purchase Price Multiple 10.8x 7.0x 6.1x 2019PF 2021 2021 w/ Full Synergies • Acquisition of Clariant Color business significantly expanded presence in healthcare, packaging and consumer end markets • Strength of portfolio – double-digit annual EBITDA growth since acquisition • $54 million of synergies realized in 2021 • Acquisition completed on July 1, 2020 for $1.45 billion.

Operating Income $3,783 $4,100 (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Previous Guidance Current Guidance $3,783 $4,300 $308 $360 $308 $410 $1.93 $2.40 $1.93 $2.80 (1) (1)(1) (1)(1) (1) $442 $457 $560 $1.74 $1.93 $2.80 FULL YEAR 2019 – 2021 ORGANIC GROWTH 23 Sales Adjusted EBITDA $3,981 $3,783 $4,300 + 8% (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition (1)(1) + 27% + 61% 24 BALANCE SHEET • Deleveraging to 1.9x net debt to adjusted EBITDA by the end of 2021 • Driven by record adjusted EBITDA performance and strong free cash flow generation from asset light business • Future cash deployment: M&A, opportunistic share repurchases and balance sheet / continued leverage reduction 3.5x 2.7x 1.9x Net Debt / Adjusted EBITDA ($ in millions) 2021E Adjusted EBITDA 560$ Free Cash Flow 275$ Total Debt 1,860 Less: Cash (800) Net Debt 1,060$ 2021E Net Debt / Adjusted EBITDA 1.9x (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition PEER COMPARISONS 25 As a specialty formulator, we don’t require significant capital investment, as compared to the base resin raw material suppliers we purchase from.

It is better to fill out the part at slower speeds in-order to let any compressed air escape, and to get the best surface finish on the part.3 • Using all of the previous settings, record the Transfer Pressure, Fill Time, and Injection speed • Reduce the injection velocity by 10% and record the same values • Keep reducing the injection velocity until a fill time of 10-15 seconds is reached Transfer (psi) Fill Time (sec) Injection Velocity (in/sec) Relative Shear Rate Relative Viscosity 1238 0.20 8.00 5.00 247.60 1125 0.22 7.00 4.55 247.50 1058 0.25 6.00 4.00 264.50 960 0.35 5.00 2.86 336.12 870 0.45 4.00 2.22 391.65 780 0.58 3.00 1.72 452.59 690 0.85 2.00 1.18 586.78 600 1.35 1.00 0.74 810.45 510 2.50 0.75 0.40 1275.83 420 5.23 0.50 0.19 2198.34 330 9.56 0.25 0.10 3157.99 240 15.26 0.10 0.07 3667.49 FIGURE 47 - Injection Speed 22 Gravi-Tech • Calculate the Relative Viscosity for each of the Injection Speeds using the equation above (Transfer Pressure * Fill Time) • Calculate the Relative Shear Rate for each of the injection speeds using the equation (1/Fill Time) • Plot the points on a graph and find the optimum velocity • The optimum velocity will be where the curve starts to level out In figure 48 above, the optimum velocity is where the plotted line crosses the black trend line; therefore the optimum velocity would be about 1.00 in/sec.

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.

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.

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.

Specialty Engineered Materials and Performance Products & Solutions deliver record third quarter operating income

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.

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.