X0306 4 2018-06-12 0 0001300699 Athenex, Inc. ATNX 0001290865 Zhang Song-Yi C/O ATHENEX, INC. 1001 MAIN STREET, SUITE 600 BUFFALO NY 14203 1 0 1 0 0001709068 Mandra Medical Ltd NEWHAVEN TRUSTEES (BVI) LTD., 3RD FLOOR J&C BUILDING, P.O. BOX 933, ROAD TOWN TORTOLA D8 VG1110 VIRGIN ISLANDS, BRITISH 0 0 1 0 0001709077 Beansprouts Ltd NEWHAVEN TRUSTEES (BVI) LTD., 3RD FLOOR J&C BUILDING, P.O. BOX 933, ROAD TOWN TORTOLA D8 VG1110 VIRGIN ISLANDS, BRITISH 0 0 1 0 0001709117 Mui Bing How Tammy C/O ATHENEX, INC., 1001 MAIN STREET SUITE 600 BUFFALO NY 14203 0 0 1 0 Common Stock 2018-06-12 4 J 0 71794 0.00 D 5554914 I By Mandra Medical Limited Common Stock 4000 D Common Stock 181818 I By iBase Ltd. Common Stock 678880 I By Avalon Biomedical (Management) Limited Common Stock 287176 I By Mandra Health Limited Stock Option (Right to Buy) 7.50 2025-05-18 Common Stock 80000 80000 D Stock Option (Right to Buy) 9.00 2025-10-17 Common Stock 48000 48000 D Stock Option (Right to Buy) 11.00 2027-06-14 Common Stock 28500 28500 D Stock Option (Right to Buy) 9.00 2025-07-17 Common Stock 54904 54904 I By Avalon Biomedical (Management) Limited Represents a pro-rata, in-kind distribution by Mandra Medical Limited, without additional consideration. Each of Mandra Health Limited and Mandra Medical Limited are wholly-owned subsidiaries of Beansprouts Limited. Song-Yi Zhang ("Mr. Zhang") is a member of the board of directors of each of Mandra Health Limited and Mandra Medical Limited and, together with his spouse, owns all of the outstanding interests in Beansprouts Limited and shares voting and dispositive power over the shares held by it. Mr. Zhang disclaims beneficial ownership of the reported securities except to the extent, if any, of its or his pecuniary interest therein, and this report shall not be deemed an admission that Mr. Zhang is the beneficial owner of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. Mr. Zhang is the sole owner and director of iBase Ltd. and has sole voting and dispositive power over the shares held by iBase Ltd. Avalon Biomedical (Management) Limited ("Avalon Biomedical") is an indirect, wholly-owned subsidiary of Avalon Global Holdings Limited ("Avalon Global"). Mr. Zhang, together with his spouse, indirectly owns all of the outstanding interests in Mandra Medical Limited, which owns 10.82% of the outstanding interests in Avalon Global, and Mr. Zhang serves on the board of directors of Avalon Global and has shared voting and dispositive power with respect to the shares held by Avalon Biomedical. The option vested in full on May 18, 2016. The option vested in two equal annual installments beginning on October 17, 2016. The option vests in four equal annual installments beginning on June 14, 2018. The option vests in three equal annual installments beginning on July 17, 2016. Song-Yi Zhang, By: /s/ Teresa Bair, Attorney-in-Fact 2018-06-13 Mandra Medical Limited, By: Song-Yi Zhang, Director, By: /s/ Teresa Bair, Attorney-in-Fact 2018-06-13 Beansprouts Limited, By: Song-Yi Zhang, Director, By: /s/ Teresa Bair, Attorney-in-Fact 2018-06-13 Mui Bing How Tammy, By: /s/ Teresa Bair, Attorney-in-Fact 2018-06-13