WITH ADDITIONAL FACILITIES LISTED ON THE ATTACHED ANNEX) has been assessed by ABS Quality Evaluations, Inc. and found to be in conformance with the requirements set forth by: RCMS®:2013 (Option 2) The Environment, Health, Safety and Security Management System is applicable to: Design and Manufacture of Plastic Compounds Certificate No: 55543 Effective Date 21 December 2017 ABS Quality Evaluations, Inc. 16855 Northchase Drive, Houston, TX 77060, U.S.A.

LEADING ANTENNA MANUFACTURER A N T E N N A C O M P O N E N T S • Extremely tight performance tolerance • Dielectric performance of 3 – 7Dk • Ability to utilize existing injection molding machinery • High mold flow index (MFI) • On demand material delivery • Provided technical support throughout the development of multiple, highly technical materials • Formulated high quality materials that aligned with stringent specification, at a cost effective price • Provided order flexibility, allowing customer to order on demand • Collaborated across the supply chain, enabling customer to take a premium solution to market that can reduce maintenance and construction costs for end users Custom PREPERM™ Low-Loss Dielectric Formulations KEY REQUIREMENTS WHY AVIENT?

DAIRY PRODUCTS PRODUCER U H T M I L K B O T T L E S • >99% light blocking to protect riboflavin and vitamins • Monolayer bottle design • Product integrity • Premium package aesthetic • Delivered a superior white light blocking additive offering 99.99% light blocking for dairy products • Provided effective visible light blocking for extended shelf life of UHT milk in a monolayer bottle • Achieved bright white, premium bottle aesthetics for enhanced shelf appeal ColorMatrix Lactra LX Light Blocking Additive for PET KEY REQUIREMENTS WHY AVIENT?

In addition, operating income before the effect of special items is a component of Avient’s annual and long-term employee incentive plans and is used in debt covenant computations. Senior management believes the measures described above are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. A reconciliation of these measures to their most directly comparable GAAP measures is provided in the tables below. 1 Reconciliation of EBITDA by Segment Three Months Ended December 31, Year Ended December 31, 2020 2019 2020 2019 Sales: Color, Additives and Inks $ 525.8 $ 226.7 $ 1,502.9 $ 1,003.8 Specialty Engineered Materials 190.6 177.5 708.8 745.7 Distribution 305.1 272.4 1,110.3 1,192.2 Corporate and eliminations (24.5) (18.0) (79.9) (79.0) Sales $ 997.0 $ 658.6 $ 3,242.1 $ 2,862.7 Operating income: Color, Additives and Inks $ 57.5 $ 27.2 $ 180.8 $ 147.4 Specialty Engineered Materials 30.4 18.8 94.4 83.7 Distribution 18.0 17.0 69.5 75.4 Corporate and eliminations (40.9) (42.5) (155.4) (149.7) Operating Income $ 65.0 $ 20.5 $ 189.3 $ 156.8 Items Below Operating Income in Corporate: Other income, net $ 11.7 $ 10.7 $ 24.3 $ 12.1 Depreciation & amortization: Color, Additives and Inks $ 27.3 $ 10.7 $ 75.1 $ 42.7 Specialty Engineered Materials 7.4 7.0 30.0 29.5 Distribution 0.3 0.1 0.7 0.5 Corporate and eliminations 2.8 1.0 9.3 5.4 Depreciation & Amortization $ 37.8 $ 18.8 $ 115.1 $ 78.1 EBITDA: Color, Additives and Inks $ 84.8 $ 37.9 $ 255.9 $ 190.1 Specialty Engineered Materials 37.8 25.8 124.4 113.2 Distribution 18.3 17.1 70.2 75.9 Corporate and eliminations (26.4) (30.8) (121.8) (132.2) EBITDA $ 114.5 $ 50.0 $ 328.7 $ 247.0 EBITDA as a % of sales: Color, Additives and Inks 16.1 % 16.7 % 17.0 % 18.9 % Specialty Engineered Materials 19.8 % 14.5 % 17.6 % 15.2 % Distribution 6.0 % 6.3 % 6.3 % 6.4 % Corporate and eliminations nm nm nm nm Total Company 11.5 % 7.6 % 10.1 % 8.6 % nm - not meaningful 2 Three Months Ended December 31, Year Ended December 31, Reconciliation to Adjusted EBITDA: 2020 2019 2020 2019 Net income from continuing operations – GAAP $ 74.7 $ 6.4 $ 133.8 $ 75.7 Income tax expense (17.3) 12.9 5.2 33.7 Interest expense 19.3 11.9 74.6 59.5 Depreciation and amortization from continuing operations 37.8 18.8 115.1 78.1 EBITDA $ 114.5 $ 50.0 $ 328.7 $ 247.0 Special items, before tax 4.2 15.0 66.2 61.7 Interest expense included in special items — — (10.1) — Accelerated depreciation included in special items (0.7) — (3.2) — Adjusted EBITDA $ 118.0 $ 65.0 $ 381.6 $ 308.7 Three Months Ended December 31, 2020 Reconciliation of Adjusted Earnings per Share: Avient Special Items Adjusted Avient Sales $ 997.0 $ — $ 997.0 Operating income $ 65.0 $ 14.6 $ 79.6 Interest expense, net (19.3) — (19.3) Other income, net 11.7 (10.4) 1.3 Income taxes 17.3 (30.9) (13.6) Net income from continuing operations attributable to Avient shareholders $ 74.2 $ (26.7) $ 47.5 Weighted average diluted shares 92.1 Adjusted EPS - excluding special items $ 0.52 Reconciliation of Adjusted EBITDA from continuing operations: Operating income and other income, net $ 76.7 $ 4.2 $ 80.9 Depreciation and amortization 37.8 (0.7) 37.1 EBITDA from continuing operations $ 114.5 $ 3.5 $ 118.0 EBITDA as a % of sales 11.8 % 3 Three Months Ended December 31, 2019 Reconciliation of Pro Forma Adjusted Earnings per Share: Avient Special Items Adjusted Avient Clariant MB Pro Forma Adjustments(1) Pro Forma Adjusted Avient Sales $ 658.6 $ — $ 658.6 $ 263.5 $ 922.1 Operating income $ 20.5 $ 24.6 $ 45.1 $ 13.2 $ 58.3 Interest expense, net (11.9) — (11.9) (11.1) (23.0) Other income, net 10.7 (9.6) 1.1 — 1.1 Income taxes (12.9) 4.9 (8.0) (0.5) (8.5) Net income from continuing operations attributable to Avient shareholders $ 6.4 $ 19.9 $ 26.3 $ 1.6 $ 27.9 Weighted average diluted shares 77.5 Impact to diluted shares from January 2020 equity offering 15.3 Pro forma weighted average diluted shares 92.8 Pro forma adjusted EPS $ 0.30 Reconciliation of Pro Forma Adjusted EBITDA from continuing operations: Operating income and other income, net $ 31.2 $ 15.0 $ 46.2 $ 13.2 $ 59.4 Depreciation and amortization 18.8 — 18.8 15.1 33.9 EBITDA from continuing operations $ 50.0 $ 15.0 $ 65.0 $ 28.3 $ 93.3 EBITDA as a % of sales 10.1 % (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition Year Ended December 31, 2020 Reconciliation of Pro Forma Adjusted Earnings per Share: Avient Special Items Adjusted Avient Clariant MB Pro Forma Adjustments(1) Pro Forma Adjusted Avient Sales $ 3,242.1 $ — $ 3,242.1 $ 540.4 $ 3,782.5 Operating income $ 189.3 $ 73.7 $ 263.0 $ 45.0 $ 308.0 Interest expense, net (74.6) 10.1 (64.5) (18.1) (82.6) Other income, net 24.3 (17.6) 6.7 — 6.7 Income taxes (5.2) (41.4) (46.6) (6.2) (52.8) Net income attributable to noncontrolling interests (1.8) — (1.8) — (1.8) Net income from continuing operations attributable to Avient shareholders $ 132.0 $ 24.8 $ 156.8 $ 20.7 $ 177.5 Weighted average diluted shares 90.6 Impact to diluted shares from January 2020 equity offering 1.5 Pro forma weighted average diluted shares 92.1 Pro forma adjusted EPS $ 1.93 Reconciliation of Pro Forma Adjusted EBITDA from continuing operations: Operating income and other income, net $ 213.6 $ — $ 56.1 $ 269.7 $ 45.0 $ — $ 314.7 Depreciation and amortization 115.1 (3.2) 111.9 30.1 142.0 EBITDA from continuing operations $ 328.7 $ 52.9 $ 381.6 $ 75.1 $ 456.7 EBITDA as a % of sales 12.1 % (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition 4 Year Ended December 31, 2019 Reconciliation of Pro Forma Adjusted Earnings per Share: Avient Special Items Adjusted Avient Clariant MB Pro Forma Adjustments(1) Pro Forma Adjusted Avient Sales $ 2,862.7 $ — $ 2,862.7 $ 1,118.6 $ 3,981.3 Operating income $ 156.8 $ 71.7 $ 228.5 $ 72.9 $ 301.4 Interest expense, net (59.5) — (59.5) (33.4) (92.9) Other income, net 12.1 (10.0) 2.1 — 2.1 Income taxes (33.7) (5.9) (39.6) (9.1) (48.7) Net income attributable to noncontrolling interests (0.2) — (0.2) — (0.2) Net income from continuing operations attributable to Avient shareholders $ 75.5 $ 55.8 $ 131.3 $ 30.4 $ 161.7 Weighted average diluted shares 77.7 Impact to diluted shares from January 2020 equity offering 15.3 Pro forma weighted average diluted shares 93.0 Pro forma adjusted EPS $ 1.74 Reconciliation of Pro Forma Adjusted EBITDA from continuing operations: Operating income and other income, net $ 168.9 $ — $ 61.7 $ 230.6 $ 72.9 $ — $ 303.5 Depreciation and amortization 78.1 — 78.1 60.3 138.4 EBITDA from continuing operations $ 247.0 $ 61.7 $ 308.7 $ 133.2 $ 441.9 EBITDA as a % of sales 11.1 % (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition Three Months Ended March 31, 2020 Reconciliation of Pro Forma Adjusted Earnings per Share: Avient Special Items Adjusted Avient Clariant MB Pro Forma Adjustments(1) Pro Forma Adjusted Avient Sales $ 711.5 $ — $ 711.5 $ 279.4 $ 990.9 Operating income 52.8 9.7 62.5 23.0 85.5 Interest expense, net (9.4) — (9.4) (12.8) (22.2) Other income, net 1.6 (0.1) 1.5 — 1.5 Income taxes (11.9) (1.0) (12.9) (2.4) (15.3) Net income from continuing operations attributable to Avient shareholders $ 33.1 $ 8.6 $ 41.7 $ 7.8 $ 49.5 Weighted average diluted shares 86.7 Impact to diluted shares from January 2020 equity offering 6.1 Pro forma weighted average diluted shares 92.8 Pro forma adjusted EPS $ 0.53 (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition 5 Three Months Ended December 31, 2019 Year Ended December 31, 2019 Reconciliation of pro forma sales, operating income, and EBITDA: CAI Clariant MB Pro Forma Adjustments(1) Pro Forma CAI CAI Clariant MB Pro Forma Adjustments(1) Pro Forma CAI Sales $ 226.7 $ 263.5 $ 490.2 $ 1,003.8 $ 1,118.6 $ 2,122.4 Operating income $ 27.2 $ 13.2 $ 40.4 $ 147.4 $ 72.9 $ 220.3 EBITDA $ 37.9 $ 28.3 $ 66.2 $ 190.1 $ 133.2 $ 323.3 EBITDA as a % of sales 13.5 % 15.2 % (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition Year Ended December 31, 2020 Reconciliation of pro forma sales, operating income, and EBITDA: CAI Clariant MB Pro Forma Adjustments(1) Pro Forma CAI Sales $ 1,502.9 $ 540.4 $ 2,043.3 Operating income $ 180.8 $ 45.0 $ 225.8 EBITDA $ 255.9 $ 75.1 $ 331.0 EBITDA as a % of sales 16.2 % (1) - Pro forma adjustments for the periods prior to the acquisition date (July 1, 2020) and to give effects of the financing for the acquisition Free cash flow, defined as cash provided by operating activities excluding items associated with acquisitions and divestitures, less capital expenditures, is considered a non-GAAP financial measure.

Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior period s without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient's annual incentive plans and is used in debt covenant computations. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient's annual incentive plans and is used in debt covenant computations. Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

Lactra LX provided effective light blocking on monolayer UHT milk bottles OnColor™ Impress™ High Gloss Metallic Effect Colorants (English) Study of the effects of formulation and thickness on the dielectric, signal transparency properties of Versaflex TPEs

Senior management believes these measures are useful to investors because they allow for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude. In addition, operating income before the effect of special items is a component of Avient's annual incentive plans and is used in debt covenant computations. Senior management believes this measure is useful to investors because it allows for comparison to Avient's performance in prior periods without the effect of items that, by their nature, tend to obscure Avient's operating results due to the potential variability across periods based on timing, frequency and magnitude.

BUILDING MATERIALS COMPANY Q U A R T Z C O U N T E R T O P S • Offer custom color design for new product development • Provide regulatory support to help achieve compliance with new formulations • Deliver reliable color consistency • Meet high-volume, global production needs • Developed custom colorant technology to support end applications for new products • Provided effective global EH&S and regulatory support to help mitigate risk • Enabled lot-to-lot color consistency with exceptional dispersion uniformity • Met the need for a high degree of material consumption leveraging our global footprint Stan-Tone HCC Vinyl Paste Dispersions KEY REQUIREMENTS WHY AVIENT?

Application Snapshot NIR _ REJOIN Final COSMETICS BRAND P E R S O N A L C A R E & C O S M E T I C S P A C K A G I N G • Excellent color performance in PCR resin • Combinable with functional additives • Parts manufactured with 100% PCR • Worked with customer to create circular packaging options with glamorous and striking special effects • Provided a solution that enabled added shine, ensuring the customer achieved beautiful packaging without compromising NIR detectability • Ensured the solution was available for many cosmetics packaging types, including bottles, make-up and caps OnColor™ NIR Black & Dark Sortable Colorants & Rejoin™ PCR Masterbatch for Polyolefins KEY REQUIREMENTS WHY AVIENT?