SELLAS Life Sciences Group Inc. (NASDAQ:SLS) reported first-quarter (Q1) 2026 financial results on Tuesday while highlighting progress across its acute myeloid leukemia (AML) pipeline. CEO Angelos Stergiou said the company continued advancing its clinical programs during the quarter while preparing for the anticipated data readout from its pivotal Phase 3 REGAL study. SELLAS will release the upcoming data after the study reaches its pre-specified 80th event threshold — a major milestone for the