Phoenix Biotech Acquisition Corp. was a special purpose acquisition company, established with the goal of identifying and combining with an operating business, particularly within the healthcare or related sectors across the United States and Europe. Incorporated in 2021 and headquartered in Oakland, California, the entity completed its business combination with CERo Therapeutics, Inc. in February 2024. Following the successful merger, Phoenix Biotech Acquisition Corp. transitioned into CERo Therapeutics Holdings, Inc., which now operates as an innovative immunotherapy company. The combined public company's shares are now listed on the Nasdaq Global Market under the ticker symbol CERO, focusing on advancing next-generation engineered T-cell therapeutics for oncology.