Expand EBITDA margins to 20% 3. Deliver annual EBITDA and EPS growth of 10% and 15% 4. EBITDA and Adjusted EBITDA are non-GAAP financial measures that management uses in evaluating operating performance.

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STARTUP & SHUTDOWN RECOMMENDATIONS Purge Compound HDPE or HIPS Recycling Recycling Edgetek™ up to 20% is permissible. Venting • Place vents at the end of fill and anywhere potential knit/weld lines will occur. • All vents need to be vented to atmosphere. • For circular parts, full perimeter venting is recommended. • Cut vent depths to: - PPA Compounds: 0.0015"–0.0025" depth and 0.250" width - PC Compounds: 0.002"–0.004" depth and 0.250" width - PSU Compounds: 0.003"–0.004" depth and 0.250" width - PES Compounds: 0.003"–0.004" depth and 0.250" width - PPS Compounds: 0.002"–0.003" depth and 0.250" width - Acetal Compounds: 0.0015" minimum depth and 0.250" width - PEEK Compounds: 0.002"–0.004" depth and 0.250" width - Nylon Compounds: 0.002" minimum depth and 0.250" width • Increase vent depth to 0.060" (1.5mm) at 0.250" (4.0mm) away from the cavity and vent to atmosphere. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

STARTUP & SHUTDOWN RECOMMENDATIONS Purge Compound HDPE or HIPS Recycling Recycling LubriOne up to 20% is permissible. Venting • Place vents at the end of fill and anywhere potential knit/weld lines will occur. • All vents need to be vented to atmosphere. • For circular parts, full perimeter venting is recommended. • Cut vent depths to: - PPA Compounds: 0.0015"–0.0025" depth and 0.250" width - PC Compounds: 0.002"–0.004" depth and 0.250" width - PSU Compounds: 0.003"–0.004" depth and 0.250" width - PES Compounds: 0.003"–0.004" depth and 0.250" width - PPS Compounds: 0.002"–0.003" depth and 0.250" width - Acetal Compounds: 0.0015" minimum depth and 0.250" width - PEEK Compounds: 0.002"–0.004" depth and 0.250" width - Nylon Compounds: 0.002" minimum depth and 0.250" width • Increase vent depth to 0.060" (1.5mm) at 0.250" (4.0mm) away from the cavity and vent to atmosphere. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

BASE RESIN ABS Drying Temperature 80–90°C Drying Time 2–3 Hours Barrel Temperatures °C Rear Zone 180–210 Center Zone 190–220 Front Zone 200–230 Nozzle 210–240 Mold Temperature 50–80 Screw Speed Moderate Back Pressure 3–10 bar Cushion 5–15 mm Injection Speed Low to medium Injection Pressure Moderate to high Holding Pressure 10–30% of injection pressure Screw Type General purpose Screw L/D 20:1 Screw Compression Ratio 2.0:1–2.5:1 Non-return Check Valve Free flow check ring Nozzle Type Reverse taper Barrel Capacity 30–80% of barrel should be used STARTUP & SHUTDOWN RECOMMENDATIONS Purge Compound 2–3 melt flow PP or purging compound. Venting • Place vents at the end of fill and anywhere potential knit/weld lines will occur. • All vents need to be vented to atmosphere. • For circular parts, full perimeter venting is recommended. • Cut vent depths to 0.0007″–0.0015″. You have the responsibility to conduct full-scale end-product performance testing to determine suitability in your application, and you assume all risk and liability arising from your use of the information and/or use or handling of any product.

The non-GAAP financial measures include: Adjusted Earnings Per Share, Net Debt / Adjusted EBITDA, and Adjusted EBITDA. Expand EBITDA margins to 20% 3. EBITDA MARGIN PERFORMANCE Results vs.

The non-GAAP financial measures include: Adjusted Earnings Per Share, Adjusted EBITDA, Adjusted EBITDA margins and Adjusted free cash flow. EBITDA margin up from about 5% (2006) to 16% (2023) Our evolution Specialty formulator of materials Copyright © . Year Ended December 31, Reconciliation to EBITDA and Adjusted EBITDA: 2006 2023 Sales $ 2,622.4 $ 3,142.8 Net income from continuing operations – GAAP $ 133.5 $ 76.3 Income tax expense 29.7 11.0 Interest expense, net 63.1 115.3 Depreciation and amortization from continuing operations 57.1 188.8 EBITDA from continuing operations 283.4 391.4 Special items, before tax (34.0) 114.6 Interest expense included in special items — (2.3) Depreciation and amortization included in special items — (1.9) JV - equity income (107.0) — Adjusted EBITDA $ 142.4 $ 501.8 Adjusted EBITDA as a percent of sales 5.4 % 16.0 % 1 Avient Investor Day_Dec 2024_Wednesday morning edition.pdf Investor Day - Dec24 - Non-GAAP v4 12.03.24 545PM.pdf Attachment

Page 93 2011 Highlights • Versus 2010, revenue growth of 9% drives 23% increase in adjusted operating income • Adjusted EPS expands 29% to all-time high of $1.02 Net Sales Adjusted Operating $1.02 Adjusted EPS $2,622 $2,643 $2,739 $2,061 $2,622 $2,864 Net Sales $88 $87 $72 $59 $147 $181 Adjusted Operating Income $0.12 $0.27 $0.21 $0.13 $0.79 $1.02 ($ millions) ($ millions) Page 94 2011 Highlights • Each platform contributed to our year over year operating income growth • Record OI achieved in Specialty and POD • Ten quarters of double-digit adjusted EPS expansion POD PP&SSpecialty Platform ROS%* 0.6% 1.5% 3.2% 4.3% 5.3% 8.4% 8.0% 2.9% 2.6% 3.0% 3.5% 4.0% 4.6% 5.6% 6.7% 5.5% 6.1% 3.1% 5.0% 7.0% 7.2% $20 $19 $22 $28 $25 $42 $56 O p e ra ti n g I n co m e POD $76 $64 $66 $31 $33 $54 $62 O p e ra ti n g In co m e PP&S $5 $13 $31 $46 $46 $87 $89 O p e ra ti n g I n co m e Specialty Platform *ROS% is defined as adjusted operating income % of revenue ($ millions) Page 95 2011 Highlights • Continued portfolio repositioning � Sale of SunBelt equity investment � Acquisition of specialty companies ColorMatrix and Uniplen • World-class working capital of 9.6% maintained while improving on-time delivery to 94%improving on-time delivery to 94% 81% 87% 88% 95% 93% 92% 94% 2005 2006 2007 2008 2009 2010 2011 14.3% 16.2% 14.4% 18.9% 11.7% 9.6% 9.6% 2005 2006 2007 2008 2009 2010 2011 On-Time Delivery Working Capital % of Sales Page 96 First Quarter 2012 Highlights • Revenues increased 9% over Q1 2011 to a new quarterly record • Adjusted EPS increased 12% $0.26 $0.29 Q1 2011 Q1 2012 Adjusted EPS • Adjusted EPS increased 12% over prior year • All platforms delivered double-digit operating income growth Q1 2011 Q1 2012 $25.2 $14.7 $29.1 $17.8 $16.7 Specialty PP&S POD Q1 2011 Q1 2012 Adjusted Operating Income $14.3 ($ millions) Page 97 • Total Debt at 3/31/12 Less: Cash Net Debt • Available Liquidity $706 186 $520 $300 $360 $250 $300 $350 $400 $450 Debt Maturities As of March 31, 2012 ($ millions) Debt Maturities & Liquidity Summary – 3/31/12 • Available Liquidity Cash ABL Availability Total Liquidity • Net Debt / EBITDA* = 1.9x $186 156 $342 *Adjusted EBITDA TTM Pro forma for ColorMatrix $50 $300 $0 $50 $100 $150 $200 $250 2015 2017 2020 Page 98 • Repurchased 6 million shares in 2011 Share Share RepurchaseRepurchase • Introduced a quarterly dividend in Q1 2011 and increased in Q1 DividendsDividends • Expanding our sales, marketing, and technical capabilities is top Organic Organic GrowthGrowth • Targets that expand our: • Specialty offering • End market presence AcquisitionsAcquisitions Use of Cash Current Cash Balance = $186M Net Debt / EBITDA* = 1.9X • 7.9 million shares remain available for repurchase under the current authorization increased in Q1 2012 • Objective of maintaining and growing capabilities is top priority • Investing in operational and LSS initiatives • CAPEX • End market presence • Geographic footprint • Synergy opportunities • Adjacent material solutions *Adjusted EBITDA TTM Pro forma for ColorMatrix Page 99 Page 100

The non-GAAP financial measures include: Adjusted Earnings Per Share, Adjusted EBITDA and Adjusted EBITDA Margin. Expand EBITDA margins to 20% 3. EBITDA MARGIN PERFORMANCE Results vs.

The non-GAAP financial measures include: Adjusted Earnings Per Share, Free Cash Flow, Net Debt/Adjusted EBITDA, Adjusted EBITDA and Adjusted EBITDA Margin. We also monitor earnings (defined as net income from continuing operations) before interest, taxes, depreciation and amortization (EBITDA) and adjusted EBITDA (EBITDA before the impact of special items) as a supplement to our GAAP measures. EBITDA and Adjusted EBITDA are non-GAAP financial measures that management uses in evaluating operating performance.