The extract contains both the existing activities under the old classification of 2003, valid until 31/12/2007, as the new classification of 2008, valid from 1/1/2008. The extract contains both the existing activities under the old classification of 2003, valid until 31/12/2007, as the new classification of 2008, valid from 1/1/2008. The extract contains both the existing activities under the old classification of 2003, valid until 31/12/2007, as the new classification of 2008, valid from 1/1/2008.

Avient acquired the Clariant Masterbatch business (CMB) on July 1, 2020 (the “Acquisition Date”). Q 2 2 0 2 1 P E R F O R M A N C E U P D AT E $69 $122 2020PF 2021 $0.42 $0.87 2020PF 2021 Q2 2021 – ORGANIC PERFORMANCE ( T O TA L C O M PA N Y ) 10 Sales Adjusted Operating Income $870 $1,235 2020PF 2021 + 42% Adjusted EPS + 77% + 107% (in millions) (in millions) (1) (1) (1) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition Q2 2021 SEGMENT PERFORMANCE 11 CAI $488 $624 Sales ($ in millions) SEM Distribution $54 $86 Operating Income +28% +59% $239 $404 Sales $15 $24 Operating Income +69% +60% (1) $159 $241 Sales $17 $37 Operating Income +52% +118% (1) (1) Financial information is pro forma to include a full year of Clariant Masterbatch business acquisition SPECIALTY EBITDA MARGIN EXPANSION 12 CAI (1) 2018-2020 financial information is pro forma to include a full year of Clariant Masterbatch business acquisition 15.3% 15.2% 16.2% 18.5% 2018 2019 2020 YTD 2021 14.8% 15.2% 17.6% 19.1% 2018 2019 2020 YTD 2021 (1) SEM • Continued portfolio transformation to high-growth end markets and sustainable solutions • Clariant Masterbatch synergy realization • Investments in composites and outdoor high performance applications drive growth and mix improvements CAI EBITDA MARGIN EXPANSION 13 Legacy CAI 18.9% 18.9% 20.3% 2019 2020 YTD 2021 Legacy Clariant MB 11.9% 13.8% 16.8% 2019 2020 YTD 2021 • Synergy capture translating to the bottom line • Positive mix with growth in healthcare, consumer and packaging end-markets • World-class vitality index of 35% represents sales from products introduced in the last five years. Clariant MB acquired July 1, 2020 COLORWORKS I N S P I R AT I O N .

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KEY PERFORMANCE ADVANTAGES Southern Yellow Pine1 Equivalent Wood Pole GridCore FRP Pole2 14 in x .750 in Length (ft) Load Class3 Allowable Class Load4 (kip) Weight (lb) Deflection5 (in) Weight (lb) Deflection5 (in) 40 3 1.95 1360 35 1040 12 2 2.41 1580 32 14 1 2.93 1810 30 18 H1 3.51 2050 28 21 H2 4.16 2310 26 25 45 3 1.95 1630 45 1170 17 2 2.41 1880 41 21 1 2.93 2160 38 26 H1 3.51 2450 36 31 H2 4.16 2760 33 37 50 3 1.95 1910 56 1300 24 2 2.41 2210 52 30 1 2.93 2530 48 36 H1 3.51 2880 45 44 H2 4.16 3240 42 52 55 3 1.95 2210 68 1430 33 2 2.41 2550 63 40 1 2.93 2930 58 49 H1 3.51 3320 54 59 H2 4.16 3740 51 70 60 3 1.95 2520 82 1560 43 2 2.41 2910 76 53 1 2.93 3340 70 65 H1 3.51 3790 65 78 H2 4.16 4270 61 92 65 3 1.95 2840 97 1690 56 2 2.41 3290 90 69 1 2.93 3770 83 84 H1 3.51 4280 77 100 H2 4.16 4820 72 119 70 3 1.95 3180 114 1820 71 2 2.41 3690 105 87 1 2.93 4220 97 106 H1 3.51 4790 90 127 H2 4.16 5390 85 150 POLE SELECTION GUIDE 1 Wood properties data are per ANSI O5.1-2022 Table 1. Allowable Class loads are based on NESC Table 261-1. GridCore FRP Pole Southern Yellow Pine Equivalent Wood Pole Nominal Fiber Stress, F (psi) 45,000 8,000 NESC constructiona Grade B Strength factor, ɸa 1.0 0.65 Modulus of Elasticity, Eb (106 psi) 5.00 2.13 Estimated Density (lb/ft3) 120 65 DESIGN PARAMETERS a Per NESC Table 261-1 b Wood data are per ANSI O5.1-2022 Table 1.

Polyamides represent the highest polarity in Figure 1. REFERENCES 1. No Nylon Type Nylon description TPE Hardness Aging condition Peel, N/mm / lb / in 1 Capron 8333GHI Glass and impact 60A(1) Aging A 3.7 / 21 2 Capron 8333GHI Glass and impact 60A(1) Aging B 3.2 / 20 3 Capron 8333GHI Glass and impact 60A(1) Aging C 3.3 / 19 4 Capron 8333GHIHS Glass, impact and heat stabilized 60A(1) Aging A 3.2 / 20 5 Capron 8333GHIHS Glass, impact and heat stabilized 75A Aging A 3.0 / 17 6 Ultramid B3ZG6 Glass and impact 60A(1) Aging A 3.2 / 18 7 Zytel 70G33L Glass 60A(1) Aging A 3.9 / 22 8 Zytel 408AHS Heat stabilized and flow aid 60A(1) Aging A 3.7 / 21 9 Zytel 409AHS Heat stabilized and flow aid 60A(1) Aging A 3.2 / 20 Aging A: nylon substrate conditioned at room temperature and humidity for 4 weeks before TPE overmolding.

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PP32075932-LDR 1% PP62076443-LDR 1% PP42075700-LDR 1%PP52076733-LDR 1 % PP62076444-LDR 1% PP52076664-LDR 2% PP52075745-LDR 0.5% PP32076405-LDR 1% PP42075706-LDR 1%PP6N075015-LDR 1% PP13075926-LDR 2% PP63076317-LDR 0.5% PP82076957-LDR 2% PP12075762-LDR 2% PP82077077-LDR 2%PP52076834-LDR 2% PP33076395-LDR 3% PP5N075037-LDR 2% PP53076820-LDR 3% PP84076978-LDR 4% PP54076838-LDR 4%PP34076341-LDR 3% PP63076492-LDR 3% PP43075702-LDR 2%

Enter the owner's name on line 1. Form W-9 (Rev. 10-2018) Page 5 1. You can reach TAS by calling the TAS toll-free case intake line at 1-877-777-4778 or TTY/TDD 1-800-829-4059.