No. 10231X Form W-9 (Rev. 10-2018) AVIENT CORPORATION AVIENT COLORANTS USA LLC ✔ 5 E 33587 WALKER ROAD AVON LAKE, OH 44012 3 4 1 7 3 0 4 8 8 1/15/2021 Form W-9 (Rev. 10-2018) Page 2 By signing the filled-out form, you: 1. Exemption from FATCA reporting code. 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.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. 50120WOA WILFLEX OASIS RETARDER GEL To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. LIB0516 LIBRA RETARDANT To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. SOLV1329 TROPICAL RETARDER To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. AQUARIUS RETARDER To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. AQUARIUS RETARDER To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. 50100WOA WILFLEX OASIS RETARDER To search using the product code please remove the last two characters from the code for your search.

NORTH AMERICA (Goods manufactured by Avient): Use the search boxes on the current page to use the online search for SDS for products manufactured by Avient. AQUARIUS RETARDER GEL To search using the product code please remove the last two characters from the code for your search.

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In no single year in our Company’s history has such a monumental specialty portfolio improvement taken place as in 2019. Our in-house innovation pipeline remains robust, as we leverage our formulation expertise and sustainable solutions portfolio. Another excellent measurement of our innovation performance is our Vitality Index, which represents Company revenue from products that have been in our portfolio for less than five years.