X0306 4 2019-04-16 0 0001300699 Athenex, Inc. ATNX 0001427110 Zuo William Wei C/O ATHENEX, INC. 1001 MAIN STREET, SUITE 600 BUFFALO NY 14203 0 1 0 0 President, China Division Common Stock 2019-04-16 4 A 0 3426 0.00 A 1122203 D Stock Option (Right to Buy) 7.50 2025-06-11 Common Stock 120000 120000 D Stock Option (Right to Buy) 11.00 2018-06-13 2027-06-13 Common Stock 1 1 D Stock Option (Right to Buy) 17.30 2028-03-27 Common Stock 25000 25000 D Stock Option (Right to Buy) 13.17 2029-02-28 Common Stock 25000 25000 D The option vests in three equal installments beginning on June 11, 2016. This option vests in four equal annual installments beginning on March 27, 2019. The option vests in four equal annual installments beginning on February 28, 2020. /s/ Teresa Bair, Attorney-in-Fact 2019-04-17