Exhibit 99.1 atai Life Sciences Reports Fourth Quarter and Full Year 2023 Financial Results and Provides Corporate and Clinical Highlights • Strategic investment in Beckley Psytech to accelerate the development of psychedelic-based therapies that fit within the two hour in-clinic treatment paradigm established by Spravato® • Initial BPL-003 (intranasal 5-MeO-DMT) Phase 2a open-label results demonstrated a rapid and durable antidepressant ef ect through three months in TRD patients; top-line results from a c ...