Persons entitled to direct the vote of shares held by The PolyOne Retirement Savings Plan and the PolyOne Canada Inc. Prior to joining PolyOne, Mr. The mailing envelope and letter must contain a clear notation indicating that the enclosed letter is either a “Shareholder-Board of Directors Communication” or an “Interested Party-Board of Directors Communication,” as appropriate.

The site of the system user is certified as: Compounding Plant The scope of the certificate includes the following chain of custody options: (not applicable for paper traders) Mass balance Warszawa, 30.12.2024 Place and date of issue Stamp, Signature of issuing party The issuing Certification Body is responsible for the accuracy of this document. Version / Date: 1 (no adjustments) / 30.12.2024 Page 2 of 2 Annex I to the certificate: Sustainable materials handled by the certified site (This annex is applicable for all scopes except of Trader, Trader with storage, Warehouse, Logistic centres, MTBE and ETBE) This annex is only valid in connection with the certificate: ISCC-PLUS-Cert-PL214-26100824 issued on 30.12.2024 Input material Output material Add-ons (voluntary)1) Raw material category2) SAI FSA3) FEFAC4) Polypropylene (PP) Plastic Compounds (PP) NO Bio Bio-circular Circular N/A N/A Polyethylene (PE) Plastic Compounds (PE) NO Bio Bio-circular Circular N/A N/A 1) ISCC PLUS add-ons (voluntary application, see www.iscc-system.org for further information): • 202-04: Food Security Standard • 205-02: Consumables • 202-07: Low ILUC-risk feedstock • 205-03: Non GMO for food and feed • 205-01: GHG emission requirements • 205-04: Non GMO for technical markets 2) Bio raw materials complies with the ISCC Principles 1 – 6 for the cultivation and harvesting of sustainable biomass.

Row 1 Bulk organic chemicals Bulk inorganic chemicals Other chemicals Other, please specify Polymer Compounding C1. A clear example is our Sustainability Portfolio, that has been developed to help our customers meet their innovation and sustainability goals through material science. This portfolio has grown at a compounded annual growth rate of 14% since 2016, and the megatrends of the future indicate continued growth and demand.

Startup & Shutdown Recommendations Purge Compound HDPE or HIPS Recycling Recycling Gravi-Tech up to 25% is permissible. PC Compounds: 0.001"–0.002" depth and 0.250" width PC/PSU Compounds: 0.002"–0.003" depth and 0.250" width PES Compounds: 0.003"–0.004” depth and 0.250" width PEI Compounds: 0.001"–0.003” depth and 0.250" width PP Compounds: 0.001"–0.002” depth and 0.250" width ABS Compounds: 0.0015"–0.0025” depth and 0.250" width PEEK Compounds: 0.002"–0.004” depth and 0.250" width Nylon Compounds: 0.002" min. depth and 0.250" width Increase vent depth to 1.0mm (0.040") at 4.0mm (0.250") away from the cavity and vent to atmosphere.

ECCOH™ LSFOH LOW SMOKE AND FUME, NON-HALOGEN PROCESSING GUIDE To learn more about ECCOH wire and cable solutions, contact us at +1.844.4AVIENT (1-844.428.4368) www.avient.com General Extrusion Guidelines ECCOH™ compounds are thermoplastic polyolefin-based low smoke and fume, non-halogenated systems. EXTRUDER Screw 3/4" to 6" Polyethylene type—Single flight, no mixing section, 1.5–2:1 compression ratio Tooling Semi-Pressure type: 30°–40° angle Die On size with 1/8" or less land L/D 24:1 recommended Screen Pack No screen pack (Optional depending on pressure) Cooling Trough 120–150°F (50–65°C) recommended Feeder Gravimetric type preferred—3 compartment for cross-linked Dryer Desiccant type, 4 hours at 160°F (70°C) For ECCOH™ compound only; never put Dry Silane in Dryers PROCESSING Temperature ECCOH 5000 Series ECCOH 6000 Series Wire Preheat 180–250°F (80–120°C) 180–250°F (80–120°C) Feed Zones 200°F (93°C) 275°F (135°C) Transition 275°F (135°C) 325°F (163°C) Metering 300°F (150°C) 375°F (190°C) Head/Die 330°F (165°C) 420°F (215°C) Target Melt 330–340°F (165–170°C) 420–440°F (215–225°C) Flame at Die Tip Yes—as needed Line Speed Shear sensitive: Observe Melt Temperature, Motor Amperage, and Pressure Purge Compound HDPE Copyright © 2020, Avient Corporation.

In smaller quantities, the presence of water may create cloudiness in fused parts, especially those parts produced from clear or transparent plastisols. The visual appearance of a clear surface layer, or the formation of sediment on the bottom of the container, is an indication that separation has occurred and the plastisol needs to be re-mixed.

PolyOne Investor Presentation May 2017 POLYONE CORPORATION 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. POLYONE CORPORATION 3 Use of Non-GAAP Measures  This presentation includes the use of both GAAP (generally accepted accounting principles) and non-GAAP financial measures. Senior management believes these measures are useful to investors because they allow for comparison to PolyOne's performance in prior periods without the effect of items that, by their nature, tend to obscure PolyOne's operating results due to the potential variability across periods based on timing, frequency and magnitude.

PolyOne Corporation Page 4 Agenda 1:00 Introduction Robert M. Patterson PolyOne Corporation Page 5 Introduction Robert M. Patterson President and Chief Executive Officer PolyOne Corporation Page 6 PolyOne Corporation Page 7 Robert M.

Geon(TM) DB5414 DARKER CLEAR BLUE NP Geon(TM) DB5414 CLEAR GREEN NP Geon(TM) DB5414 CLEAR RED NP

DB3873 CLEAR MB2353 BLUE CLEAR MB2352 BLUE CLEAR