SGR-3515-101 is a phase 1, first-in-human, single agent, dose-escalation study designed to evaluate the safety, tolerability, dose limiting toxicities, pharmacokinetics, pharmacodynamics, and preliminary anti-tumor activity of SGR-3515 and to identify the maximum tolerated dose, recommended phase 2 dose and schedule of SGR-3515, in participants with advanced solid tumors hypothesized to be sensitive to Wee1/Myt1 inhibition and any solid tumors with designated molecular perturbation relevant to DNA damage repair pathway, including but not limited to CCNE1 amplification.