TECHNICAL BULLETIN 1 How to keep a sustainable PET recycling industry in Europe - EPBP - European PET Bottle Platform 2 How circular is PET? Picture of plaques originally made from preforms containing Fortis Amber-1 and Amosorb Solo2-2. Bottle A is the original bottle with 100% virgin material and a combination of Amosorb SolO2-2 at 4% with Fortis Amber-1 at 0.09% LDR.

Name of the company 2/2. Abbreviated name of the company 3/2. Tax number: 26500971-2-08.

Kateřiny Hájkové, LL.M., datum narození 03.06.1982, adresa místa pobytu Křižíkova 220/91, Karlín, 186 00 Praha 8, advokáta, evidenční číslo ČAK 13682, spolupracujícího s PRK Partners s.r.o., advokátní kancelář, IČO 266 92 392, se sídlem Jáchymova 26/2, Staré Město, 110 00 Praha 1, dle kterého výpis z obchodního rejstříku obsahuje stav aktuální ke dni konání valné hromady dne 21.10.2021. ----------------------------------- 2. Kateřina Hájková, LL.M., datum narození 03.06.1982, adresa místa pobytu Křižíkova 220/91, Karlín, 186 00 Praha 8, advokáta, evidenční číslo ČAK 13682, spolupracujícího s PRK Partners s.r.o., advokátní kancelář, IČO 266 92 392, se sídlem Jáchymova 26/2, Staré Město, 110 00 Praha 1 (dále též „Předsedající“). Obchodní firma: Avient Material Solutions ČR s.r.o.---------------------------------------------- 2.

To prepare samples with an active ingredient, a linear low-density poly(ethylene) masterbatch “AMPE 143101” 2 ZANDER ET AL. Figure 2 shows the performance of a select series of Versaflex™ and OnFlex™ GLS™ TPEs with a range of ZPT additive (1000–3000 ppm). Inoguchi, IHS Markit; Specialty Chemicals Update Program 2020, 1, 10. [2] N.

Enhanced customer focus 2. Play bigger and bolder in high growth markets and portfolios supported by secular trends to create product platforms of scale 2. Staying close to our customers to help them navigate the uncertain environment and execute their respective plans 2.

POLYMER FAMILY MATERIAL PRODUCT NAME PRODUCT TYPE DOSAGE Polyolefin PEAN698413 CESA Antimicro SE 99-58 Silver 2–7.5% Polyolefin PEAN698432 CESA Antimicro J8146 Zinc 1–4% Polypropylene PPA0698636 CESA Antimicro J8259 Zinc 1–4% Nylon ABA0820032 CESA Antimicro ABA0820032 Silver 2–7.5% Polyester NBAN698441 CESA Antimicro S58441 Silver 2–7.5% Polycarbonate NCAN820009 CESA Antimicro NCAN820009 Silver 2–7.5% TPU RUA0698433 CESA Antimicro J8843 Zinc 1–4% Styrenic SLA0820011 CESA Antimicro SLA0820011 Zinc 1–4%

Thursday, November 2, 2023 Thursday, November 2, 2023

Khandpur 12/1/2023 — — — — — 141,952 5,900,945 2/08/2021 — — — — — 7,291 303,087 2/14/2022 — — — — — 6,689 278,062 2/17/2023 — — — — — 7,959 330,856 2/08/2021 18,133 9,067 — 42.27 2/08/2031 — — 2/14/2022 — — 22,300 52.64 2/14/2032 — — 2/17/2023 — — 26,250 42.93 2/17/2033 — — M.A. Garratt 2/08/2021 — — — — — 5,417 225,185 2/14/2022 — — — — — 4,794 199,287 2/17/2023 — — — — — 5,701 236,991 2/04/2015 9,200 — — 38.27 2/04/2025 — — 2/15/2017 13,250 — — 34.10 2/15/2027 — — 2/14/2018 11,050 — — 41.89 2/14/2028 — — 2/11/2019 18,200 — — 31.54 2/11/2029 — — 2/10/2020 19,650 — — 31.48 2/10/2030 — — 2/08/2021 13,433 6,717 — 42.27 2/08/2031 — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — 2/17/2023 — — 18,800 42.93 2/17/2033 — — 2/08/2021 — — — — — 5,417 225,185 2/14/2022 — — — — — 4,794 199,287 2/17/2023 — — — — — 7,036 292,487 2/4/2015 2,500 — — 38.27 2/4/2025 — — 2/10/2016 10,400 — — 24.98 2/10/2026 — — 2/15/2017 10,100 — — 34.10 2/15/2027 — — 2/14/2018 10,400 — — 41.89 2/14/2028 — — 2/11/2019 17,150 — — 31.54 2/11/2029 — — 2/10/2020 19,200 — — 31.48 2/10/2030 — — 2/08/2021 13,433 6,717 — 42.27 2/08/2031 — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — 2/17/2023 — — 23,250 42.93 2/17/2033 — — L.K. Kunkle (3) 2/08/2021 — — — — — 5,792 240,773 2/14/2022 — — — — — 5,425 225,517 2/17/2023 — — — — — 6,470 268,958 2/15/2017 12,100 — — 34.10 2/15/2027 — — 2/14/2018 11,500 — — 41.89 2/14/2028 — — 2/11/2019 19,250 — — 31.54 2/11/2029 — — 2/10/2020 21,200 — — 31.48 2/10/2030 — — 2/08/2021 14,433 7,217 — 42.27 2/08/2031 — — 2/14/2022 — — 18,050 52.64 2/14/2032 — — 2/17/2023 — — 21,250 42.93 2/17/2033 — — R.M.

Lin 41,772 (2) — 41,772 * Kim Ann Mink 22,431 (2) — 22,431 * Ernest Nicolas 8,810 — 8,810 * Kerry J. Avient also makes available executive physicals to all Named Executive Officers (used by all Named Executive Officers). 2022 GRANTS OF PLAN-BASED AWARDS Grant Date Estimated Future Payouts Under Non-Equity Incentive Plan Awards Estimated Future Payouts Under Equity Incentive Plan Awards All Other Awards: Shares of or Units Exercise or Base Price of Option ($/Sh) (i) Grant Date Fair Value of Stock and Option (j) Threshold Target Maximum Threshold (f) Target (g) — 150,497(1) 1,504,973(1) 3,009,946(1) — — — — — — 215,000(2) 1,720,000(2) 3,440,000(2) — — — — — 2/14/2022 — — — 44,900(3) 134,700(3) — 52.64 2,006,642 2/14/2022 — — — — — 38,150(4) — 2,008,216 — 42,509(1) 425,086(1) 850,172(1) — — — — — — 35,625(2) 285,000(2) 570,000(2) — — — — — 2/14/2022 — — — 7,4333) 22,300(3) — 52.64 332,206 2/14/2022 — — — — — 6,350(4) — 334,264 — 31,169(1) 311,688(1) 623,376(1) — — — — — — 25,500(2) 204,000(2) 408,000(2) — — — — — 2/14/2022 — — — 5,333(3) 16,000(3) — 52.64 238,354 2/14/2022 — — — — — 4,550(4) — 239,512 — 31,641(1) 316,408(1) 632,816(1) — — — — — — 28,875(2) 231,000(2) 462,000(2) — — — — — 2/14/2022 — — — 6,017(3) 18,050(3) — 52.64 268,893 2/14/2022 — — — — — 5,150(4) — 271,096 — 34,459(1) 344,594(1) 689,188(2) — — — — — — 25,500(2) 204,000(2) 408,000(2) — — — — — 2/14/2022 — — — 5,333(3) 16,000(3) — 52.64 238,354 2/14/2022 — — — — — 4,550(4) — 239,512 Estimated Future Payouts Under Non-Equity Incentive Plan Awards (columns (c), (d) and (e)) (1) 2022 Annual Incentive Program Opportunities. PROXY STATEMENT 2023 | Annual Meeting of Shareholders 77 OUTSTANDING EQUITY AWARDS AT 2022 FISCAL YEAR-END Option Awards Stock Awards Grant Date Exercisable Unexercise- able (1) Unearned (1) Exercise Price Expiration Date Shares or Units of Stock that have not Vested (2) Market Value of Shares or Units of Stock that have not Vested Unearned Shares, Units or Other Rights that have not Vested (3) Market or Payout Value of Unearned Shares, Units or Other Rights that have not Vested 2/10/2020 — — — — — 59,071 1,994,237 — — 2/08/2021 — — — — — 46,178 1,558,969 — — 2/14/2022 — — — — — 39,116 1,320,556 — — 5/15/2014 — — — — — — — 58,845 1,986,607 2/14/2018 31,516 — — 41.89 2/14/2028 — — — — 2/11/2019 51,150 — — 31.54 2/11/2029 — — — — 2/10/2020 57,516 57,517 — 31.48 2/10/2030 — — — — 2/08/2021 59,233 118,467 — 42.27 2/08/2031 — — — — 2/14/2022 — — 134,700 52.64 2/14/2032 — — — — 8/24/2020 — — — — — 42,202 1,424,740 — — 2/08/2021 — — — — — 7,100 239,696 — — 2/14/2022 — — — — — 6,513 219,879 — — 2/08/2021 9,066 18,134 — 42.27 2/08/2031 — — — — 2/14/2022 — — 22,300 52.64 2/14/2032 — — — — 2/10/2020 — — — — — 6,764 228,353 — — 2/08/2021 — — — — — 5,274 178,050 — — 2/14/2022 — — — — — 4,667 157,558 — — 2/04/2015 9,200 — — 38.27 2/4/2025 — — — — 2/15/2017 13,250 — — 34.10 2/15/2027 — — — — 2/14/2018 11,050 — — 41.89 2/14/2028 — — — — 2/11/2019 18,200 — — 31.54 2/11/2029 — — — — 2/10/2020 13,100 6,550 — 31.48 2/10/2030 — — — — 2/08/2021 6,716 13,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — — — 2/20/2020 — — — — — 7,302 246,516 — — 2/08/2021 — — — — — 5,639 190,373 — — 2/14/2022 — — — — — 5,282 178,320 — — 2/15/2017 12,100 — — 34.10 2/15/2027 — — — — 2/14/2018 11,500 — — 41.89 2/14/2028 — — — — 2/11/2019 19,250 — — 31.54 2/11/2029 — — — — 2/10/2020 14,133 7,067 — 31.48 2/10/2030 — — — — 2/08/2021 7,216 14,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 18,050 52.64 2/14/2032 — — — — 2/10/2020 — — — — — 6,605 222,985 — — 2/08/2021 — — — — — 5,274 178,050 — — 2/14/2022 — — — — — 4,667 157,558 — — 2/11/2014 2,400 — — 35.07 2/11/2024 — — — — 2/04/2015 2,500 — — 38.27 2/4/2025 — — — — 2/10/2016 10,400 — — 24.98 2/10/2026 — — — — 2/15/2017 10,100 — — 34.10 2/15/2027 — — — — 2/14/2018 10,400 — — 41.89 2/14/2028 — — — — 2/11/2019 17,150 — — 31.54 2/11/2029 — — — — 2/10/2020 12,800 6,400 — 31.48 2/10/2030 — — — — 2/08/2021 6,716 13,434 — 42.27 2/08/2031 — — — — 2/14/2022 — — 16,000 52.64 2/14/2032 — — — — (1) Amounts in these columns represent stock-settled SARs that vest in one-third increments, with each one-third increment vesting on the later of (a) the first, second and third anniversary of the grant date, respectively and (b) the achievement of a stock price hurdle (based on Avient’s closing stock price and sustained for thirty consecutive trading days) applicable to that increment.

No. 0514.02) Revised 10/08/2019 Page 1 of 2 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2005 POLYMER DIAGNOSTICS INC. 33587 Walker Road Avon Lake, OH 44012 Ana De La Ree Phone: 440-930-3271 CHEMICAL Valid To: December 31, 2019 Certificate Number: 0514.02 In recognition of the successful completion of the A2LA evaluation process, accreditation is granted to this laboratory to perform the following rubber and plastics tests: Test Description: Test Method or Standard: Analysis of Volatile Contaminants from Polymers (Chromatography) VDA 277 FTIR (Fourier Transform Infrared) Spectroscopy ASTM E1252 (Except 7.6, 11.2, and 11.4) Flammability Horizontal Burn of Self-Supporting Plastics ASTM D635; UL 94; IEC 60695-11-10 Horizontal Burn of Materials Used in Occupant Compartments of Motor Vehicles ASTM D5132; FMVSS 302 (49 CFR 571.302) Vertical Burn, 20 mm ASTM D3801; UL 94; IEC 60695-11-10 Vertical Burn, 125 mm ASTM D5048; UL 94; IEC 60695-11-20 Oxygen Index ASTM D2863 FT1 Flame Test UL1581, Clause 1060; UL2556/CSA C22.2 No 2556, Clause 9.3 Cable Flame Test UL1581, Clause 1061 VW1 Flame Test UL1581, Clause 1080; UL2556/CSA C22.2 No 2556, Clause 9.4 FT2/FH Flame Test UL1581, Clause 1100; UL2556/CSA C22.2 No 2556, Clause 9.1 FV-1 Flame Test UL1581, Clause 1060; UL2556/CSA C22.2 No 2556, Clause 9.5 Thin Material Burning Test UL-94 Glow Wire Test IEC 60695 2-10, 2-11, 2-12, 2-13 RVCM in PVC ASTM D4443 (A2LA Cert. No. 0514.02) Revised 10/08/2019 Page 2 of 2 Test Description: Test Method or Standard: Thermal Analysis DSC (Differential Scanning Calorimetry) ASTM D3418, E794, E1356 TGA (Thermogravimetric Analysis) ASTM E1131 Karl Fischer Moisture Content ASTM D6869 Phthalate Determination by CPSIA CPSC-CH-C1001-09.3 1 The Consumer Product Safety Improvement Act (CPSIA) requires that every children's product subject to a federal consumer product safety requirement be tested by a Consumer Product Safety Commission (CPSC) accepted laboratory for compliance with the applicable federal children's product safety requirements.