X0306 4 2021-10-08 0 0001870404 PHOENIX BIOTECH ACQUISITION CORP. PBAX 0001763316 Kosacz Barbara 2201 BROADWAY, SUITE 705 OAKLAND CA 94612 1 0 0 0 Class B Common Stock 2021-10-08 4 J 0 17500 A Class A Common Stock 17500 17500 I By Phoenix Biotech Sponsor, LLC The shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the issuer's initial business combination on a one-for-one basis, subject to certain adjustments described in the issuer's charter documents and have no expiration date. Allocated to the reporting person as a member of Phoenix Biotech Sponsor, LLC, for service on the issuer's board of directors. The reporting person disclaims beneficial ownership of these securities, except to the extent of her pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for any other purpose. /s/ Chris Ehrlich, as attorney-in-fact 2021-10-12