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KEY PERFORMANCE ADVANTAGES Southern Yellow Pine1 Equivalent Wood Pole GridCore FRP Pole2 14.0 x 0.5 in 14.0 x 0.75 in Length (ft) Load Class3 Allowable Class Load4 (kip) Weight (lb) Deflection5 (in) Weight (lb) Deflection5 (in) Weight (lb) Deflection5 (in) 40 4 1.56 1160 38 707 13 1041 8 3 1.95 1360 35 17 10 2 2.41 1580 32 21 13 1 2.93 1810 30 25 16 H1 3.51 2050 28 30 19 H2 4.16 2310 26 36 22 H3 4.88 2580 24 42 26 H4 5.66 2870 23 * 30 45 4 1.56 1390 49 795 20 1171 12 3 1.95 1630 45 24 15 2 2.41 1880 41 30 19 1 2.93 2160 38 37 23 H1 3.51 2450 36 44 27 H2 4.16 2760 33 52 33 H3 4.88 3090 31 61 38 50 4 1.56 1630 61 884 27 1301 17 3 1.95 1910 56 34 21 2 2.41 2210 52 42 26 1 2.93 2530 48 52 32 H1 3.51 2880 45 62 39 H2 4.16 3240 42 73 46 H3 4.88 3620 39 * 54 55 4 1.56 1890 75 972 37 1431 23 3 1.95 2210 68 47 29 2 2.41 2550 63 58 36 1 2.93 2930 58 70 44 H1 3.51 3320 54 84 52 H2 4.16 3740 51 99 62 H3 4.88 4180 48 * 73 60 4 1.56 2150 90 1060 49 1561 31 3 1.95 2520 82 62 38 2 2.41 2910 76 76 47 1 2.93 3340 70 92 58 H1 3.51 3790 65 111 69 H2 4.16 4270 61 * 82 H3 4.88 4770 58 * 96 POLE SELECTION GUIDE Southern Yellow Pine1 Equivalent Wood Pole GridCore FRP Pole2 14.0 x 0.5 in 14.0 x .75 in Length (ft) Load Class3 Allowable Class Load4 (kip) Weight (lb) Deflection5 (in) Weight (lb) Deflection5 (in) Weight (lb) Deflection5 (in) 65 4 1.56 2430 107 1149 63 1691 40 3 1.95 2840 97 79 50 2 2.41 3290 90 98 61 1 2.93 3770 83 119 74 H1 3.51 4280 77 143 89 H2 4.16 4820 72 * 106 70 3 1.95 3180 114 1237 100 1821 63 2 2.41 3690 105 124 77 1 2.93 4220 97 150 94 H1 3.51 4790 90 180 113 H2 4.16 5390 85 * 134 75 3 1.95 3540 131 1325 125 1951 78 2 2.41 4090 121 154 96 1 2.93 4690 112 187 117 H1 3.51 5320 104 * 140 80 3 1.95 3900 150 1414 152 2081 95 2 2.41 4520 138 188 118 1 2.93 5170 128 229 143 H1 3.51 5870 119 * 172 1 Wood properties data are per ANSI O5.1-2022 Table 1. Allowable Class loads are based on NESC Table 261-1. Southern Yellow Pine Equivalent Wood Pole Nominal Fiber Stress, Fa (psi) 8,000 NESC constructionb Grade B Strength factor, ɸb 0.65 Modulus of Elasticity, Ea (106 psi) 2.13 Estimated Density (lb/ft3) 65 WOOD POLE DESIGN PARAMETERS a Average properties per ANSI O5.1-2022 Table 1. b Per NESC Table 261-1 Wood Species2 Southern Yellow Pine Design Basis Matching Deflection Matching Strength GridCore Pole Size 14 x 0.50 14 x 0.75 14 x 0.50 14 x 0.75 Pole Length (ft) 40 1 H2 H6 H6 45 1 H2 H6 H6 50 2 H1 H4 H6 55 2 H1 H4 H6 60 3 1 H3 H5 65 3 1 H2 H5 70 3 1 H1 H4 75 * 1 H1 H4 80 * 3 H1 H4 LOAD CLASS EQUIVALENCIES1 1 This table is to assist users to size GridCore™ composite poles to match performance of common wood poles based on mean moduli of elasticity of wood and FRP (NESC Grade B construction). 2 Average modulus of elasticity and fiber stress per ANSI O5.1-2022 were used in the calculations. * No data for wood poles from ANSI O5.1 for this length and load class.

Avient acquired the Clariant Color business on July 1, 2020 (the “Acquisition Date”). OUR VALUATION VERSUS PEERS Avient Specialty Formulators Other Chemical/Specialty Companies 5.4 8.5 10.1 10.0 15.7 15.0 14.2 12.7 10.2 25.0 19.7 17.7 13.2 12.3 10.0 9.9 8.9 8.5 8.3 6.6 A vi en t (2 01 1) A vi en t (2 01 6) A vi en t (2 02 1) A vi en t (T o da y) R P M K W R P P G A V Y F U L A L B E C L H X L A S H F M C B N R E M N U N V R C E S C L H U N Historic Multiple SUMMARY: WHY INVEST IN AVIENT? Avient acquired Clariant Color on July 1, 2020 (the “Acquisition Date”).

Figure 1. Picture of plaques originally made from preforms containing Fortis Amber-1 and Amosorb Solo2-2. BOTTLE COMPOSITION L* a* b* 95.91% Virgin PET/0.09% Fortis Amber-1/4% SolO2-2 76.9 3.6 39.5 50% Regrind/50% Virgin PET 83.5 2.8 19.5 50% Regrind/50% Virgin PET/0.045% Fortis Amber-1 75.6 5.5 34.5 RESULTS FOR RE-GRIND COMBINATION STUDY CONCLUSIONS Our study has shown that the combined use of Amosorb SolO2-2 and Fortis-Amber 1 in bottle applications allows for the material to be recycled through multiple recycle loops.

Base Resin PC PC/PSU PES PEI PP ABS PEEK PA Barrel Temperatures* °F (°C) Rear Zone 530–560 (277–293) 550–575 (288–302) 660–700 (349–371) 675–725 (357–385) 390–420 (199–216) 425–460 (219–238) 680–730 (360–388) 430–500 (221–260) Center Zone 515–560 (269–288) 540–565 (282–296) 650–690 (343–366) 655–710 (352–377) 380–405 (193–207) 415–450 (213–232) 670–710 (354–377) 420–490 (216–254) Front Zone 510–525 (266–274) 530–555 (277–291) 640–680 (338–360) 655–700 (346–371) 370–395 (188–202) 405–440 (207–227) 650–690 (343–366) 410–480 (210–249) Nozzle 520–535 (271–280) 540–565 (282–296) 650–690 (343–366) 665–710 (352–377) 380–400 (193–204) 415–450 (213–232) 660–700 (349–371) 420–490 (216–254) Melt Temperature 525–560 (274–293) 530–580 (277–304) 650–700 (343–371) 660–730 (349–388) 375–395 (191–202) 410–460 (210–238) 650–730 (343–388) 420–500 (216–260) Mold Temperature 175–250 (80–121) 160–220 (71–104) 280–350 (138–177) 275–350 (135–177) 100–135 (38–57) 150–180 (66–82) 300–425 (149–219) 160–230 (71–110) Pack & Hold Pressure 50%–75% of Injection Pressure Injection Velocity in/s 0.5–2.0 Back Pressure psi 50 Screw Speed rpm 40–70 40–70 40–70 40–70 40–70 40–70 40–70 40–70** Drying Parameters °F (°C) 6 hrs @ 250 (121) 4 hrs @ 250 (121) 4 hrs @ 275 (135) 4 hrs @ 250 (121) 3 hrs @ 300 (150) 2 hrs @ 200 (93) 3 hrs @ 275 (135) 4 hrs @ 180 (82) Cushion in 0.125–0.250 Screw Compression Ratio 2.0:1–2.5:1 2.0:1–2.5:1 2.5:1–3.5:1 2.5:1–3.5:1 2.5:1–3.5:1 2.5:1–3.5:1 2.5:1–3.5:1 2.5:1–3.5:1 Nozzle Type General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose General Purpose Reverse Taper Clamp Pressure 5–6 Tons/in2 * A reverse temperature profile is important to obtain optimum conductive properties. Half-round runners are not recommended. • Only naturally balanced runner systems (“H” pattern) are recommended. • Runner diameters larger than 0.150" (3.8mm) and not exceeding 0.375" (9.5mm) are recommended. • Step each 90° bend in the system down in size (from sprue to gate) approximately 1/16" (1.5mm) to reduce pressure drop. • Place vents at each 90° intersection and vent to atmosphere. • Hot runner molds are acceptable and should be sized by the manufacturer. Draft Angle • Maintain a minimum draft angle of 1/2° per side.

Data not dependent on company form 1. Tax number of the company 21/1. Company numbers 49/1.

The company noted that full year 2024 GAAP EPS includes special items of $0.17 (see attachment 3) and $0.65 of intangible amortization expense (see attachment 1). Organic sales grew in all geographic regions with the U.S. and Canada growing at 6%, EMEA at 1%, Asia at 7% and Latin America at 14%.” 2 Commenting on full year 2024 results, Dr. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. 6 Investor Relations Contact: Giuseppe (Joe) Di Salvo Vice President, Treasurer and Investor Relations Avient Corporation +1 440-930-1921 giuseppe.disalvo@avient.com Media Contact: Kyle G.

Pro Forma Financial Information The Company acquired Avient Protective Materials (“Dyneema”) on September 1, 2022 (the “Acquisition Date”) and sold the Distribution segment on November 1, 2022. EBITDA Margins (1) 5.4% 11.5% 16.2% 2006 2018 2022PF $142 $408 $592 2006 2018 2022PF 2006 figures exclude joint venture results 2022 pro forma for the acquisition of Avient Protective Materials Adj. Three Months Ended December 31, 2022 2021 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net (loss) income from continuing operations attributable to Avient shareholders $ (17.0) $ (0.19) $ 11.2 $ 0.12 Special items, after tax (Attachment 3) 38.3 0.42 23.9 0.26 Amortization expense, after-tax 14.6 0.16 11.3 0.12 Adjusted net income / EPS $ 35.9 $ 0.39 $ 46.4 $ 0.50 Year Ended December 31, 2022 2021 Reconciliation to Condensed Consolidated Statements of Income $ EPS(1) $ EPS(1) Net income from continuing operations attributable to Avient shareholders $ 82.8 $ 0.90 $ 151.8 $ 1.65 Special items, after tax (Attachment 3) 116.2 1.26 50.0 0.54 Amortization expense, after-tax 49.0 0.53 44.9 0.49 Adjusted net income / EPS $ 248.0 $ 2.69 $ 246.7 $ 2.68 (1) Per share amounts may not recalculate from figures presented herein due to rounding 1 Three Months Ended December 31, Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA 2022 2021 2022 2021 Net (loss) income from continuing operations – GAAP $ (16.6) $ 10.3 $ 83.1 $ 151.6 Income tax (benefit) expense (60.8) 17.1 (19.3) 51.9 Interest expense 49.4 17.5 119.8 75.2 Depreciation and amortization from continuing operations 48.6 38.0 162.5 145.1 EBITDA $ 20.6 $ 82.9 $ 346.1 $ 423.8 Special items, before income tax 104.3 20.5 194.0 57.1 Interest expense included in special items (16.0) — (26.0) — Depreciation and amortization included in special items (1.5) (1.6) (5.5) (1.7) APM pro forma adjustments - 2021 — 30.4 — 120.5 APM pro forma adjustments - 8 months 2022* — — 83.1 — Adjusted EBITDA $ 107.4 $ 132.2 $ 591.7 $ 599.7 * Pro forma adjustment for January - August 2022 APM results (period before Avient ownership).

Figure 1. Regarding tensile properties, three additional categories granted positive marks: 1. REFERENCES 1.

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