On April 13, 2022, Kim Campbell informed the Board of Directors of Athenex, Inc. (the Company") that she will not stand for re-election to the Board of Directors at the 2022 annual meeting of stockholders (the Annual Meeting") and will retire from the Board of Directors as of the conclusion of the Annual Meeting when her current term expires. After the Annual Meeting, the size of the Board will decrease from nine to eight directors. Ms. Campbell's retirement is not related to any disagreement with the Company on any matter relating to the Company's operations, policies or practices.

In connection with her retirement, the Board of Directors approved the acceleration of the vesting of Ms. Campbell's unvested restricted stock units and stock options, which will vest at the conclusion of the Annual Meeting.