X0306 4 2022-04-21 1 0001782223 Pyxis Oncology, Inc. PYXS 0001734389 Chin Mark C/O PYXIS ONGOLOCY, INC. 35 CAMBRIDGEPARK DRIVE CAMBRIDGE MA 02140 0 0 0 1 Former Director Common Stock 2022-04-21 4 S 0 1745761 3.05 D 0 I See footnote The securities were held directly by Arix Bioscience Holdings Limited ("Arix"). The Reporting Person is one of for members of the Investment Committee of Arix and, in such capacity, may be deemed to share voting and dispositive power over the securities held by Arix. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his respective pecuniary interests therein. /s/ Mark Chin 2022-04-25