Exhibit 99.1 Plus Therapeutics Reports Fourth Quarter and Full Year 2023 Financial Results and Business Highlights Began enrollment of the 5th of an anticipated 7 planned dosing cohorts for the ReSPECT-LM Phase 1 dose escalation trial with rhenium (186Re) obisbemeda for leptomeningeal metastases (LM) Reached agreement to expand ReSPECT-GBM Phase 2 trial and add new sites Current financial forecast for sufficient runway to fund operations into 2H 2025 Management to Host Conference Call March 5, 2024 at 5:00 ...