Pyxis Oncology (PYXS) shares tumbled 47% in recent Thursday trading after William Blair downgraded the stock to market perform.
Late Wednesday, the company reported preliminary results from a phase 1 study of PYX-201, its lead oncology drug candidate.
Pyxis also announced a new clinical trial collaboration deal with Merck (MRK) to assess the combination of PYX-201 and Merck's Keytruda in patients with head and neck squamous cell carcinoma, HR+/HER2- breast cancer, triple-negative breast cancer and sarcoma.
Price: 2.03, Change: -1.79, Percent Change: -46.86